Category: Press Release

Source: International Atomic Energy Agency – IAEA

The main power line supplying electricity to Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) has been restored after a sudden cut in the connection during the weekend, the latest reminder of the fragile nuclear safety and security situation at the site during the ongoing military conflict, Director General Rafael Mariano Grossi said today.

Underlining the potential dangers Europe’s biggest nuclear power plant is continuing to face, the IAEA experts present at the facility heard – for a second time in the past few days – the distinctive sound of several rockets that appeared to have been fired from close to the plant. Also today, the team heard multiple artillery rounds which also seemed to have been fired from near the ZNPP.

Director General Grossi said the apparent military action in the vicinity of the plant could heighten the nuclear safety and security risks at the site and potentially undermine the five concrete principles for the protection of the ZNPP that he presented at the United Nations Security Council in May earlier this year.

“I call on all sides to exercise utmost restraint at or near the Zaporizhzhya Nuclear Power Plant. No one would gain a military advantage from causing a nuclear accident during this terrible war, on the contrary,” he said. “The troubling events of recent days – with rockets launched from close to this major nuclear power plant – are further deepening our nuclear safety and security concerns.”

In a separate development, the ZNPP’s single remaining 750 kilovolt (kV) power line is again able to deliver the external electricity the plant needs for reactor cooling and other essential nuclear safety and security functions. The connection was lost on Sunday morning after a short circuit that reportedly occurred around 100 kilometres north of the site, but the power line connection was restored later the same evening.

During the time when the 750 kV line was disconnected, the ZNPP received off-site electricity from the only remaining 330 kV back-up power line. This means that there are once again two independent power lines essential for delivering external power to the plant.

“The plant’s vulnerable off-site power supplies remain one of our main concerns when it comes to nuclear safety and security in Ukraine. As we have experienced multiple times, including last winter, attacks far away from the site can cause severe disruptions in the electricity grid that also serves the Zaporizhzhya Nuclear Power Plant. All military action that could endanger nuclear safety and security must be avoided,” Director General Grossi said.

Source: International Atomic Energy Agency – IAEA

Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) lost the connection to its main off-site power line today, forcing it to rely on back-up electricity for reactor cooling in the latest incident underlining the precarious nuclear safety and security situation at the site during the ongoing military conflict, Director General Rafael Mariano Grossi said.

Separately today, the IAEA experts present at the ZNPP heard several rockets that appeared to have been fired from close to the plant. The IAEA team did not see the projectiles because of clouds but the distinctive sound indicated they were fired from a Multiple Launch Rocket System (MLRS) nearby.

“Today’s events once again clearly demonstrate the extremely fragile nuclear safety and security situation at the Zaporizhzhya Nuclear Power Plant. Europe’s largest nuclear power plant – located on the frontline – continues to face many potential threats as a result of this tragic war,” Director General Grossi said.

“I remain deeply concerned about nuclear safety and security at the plant, both when it comes to its vulnerable off-site power supplies – which can be affected by attacks far away from the site – and the more direct military risks it is facing, potentially undermining the principles that I set out at the United Nations Security Council in May. In this context, the apparent firing of rockets from near the plant is a special source of concern,” he said.

The ZNPP said a short circuit that occurred around 100 kilometres north of the plant caused the cut in the connection to its sole remaining 750 kilovolt (kV) power line – out of the four that existed before the conflict – at around 10:30am local time.

The plant continues to receive external power from its only available 330 kV back-up power line. However, one emergency diesel generator also started operating to supply reactor unit 4 after the power loss, indicating a possible issue with its electrical configuration. The diesel generator was manually shut down after ten minutes.

The plant said the 750 kV line is being repaired but it was not clear when it will be reconnected.

The ZNPP has lost external power supplies repeatedly during the conflict, including seven complete loss of off-site power events. On each of those occasions, the operation of emergency diesel generators at the site was required to provide the electricity needed by the plant for vital nuclear safety and security functions, including reactor cooling. The connection to the 750 kV line was last lost on 10 August, when the line disconnected and was reconnected twice on the same day.

Source: International Atomic Energy Agency – IAEA

International Atomic Energy Agency (IAEA) experts observed an emergency exercise conducted at  Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) this week, the latest such drill in the country’s nuclear facilities during the military conflict, Director General Rafael Mariano Grossi said today.

Thursday’s exercise focused on actions that should be taken in response to a hypothetical break of a pipe containing radioactive wastewater and the disconnection of power from one reactor unit.

The IAEA experts followed the two-hour exercise from the ZNPP’s temporary emergency centre, observing the coordination of emergency response actions. They also observed field activities during the exercise, including radiation and contamination monitoring as well as preparations for the evacuation of some plant staff. After the exercise was completed, the IAEA team observed the standard debriefing. Overall, the IAEA experts said the exercise scenario was carried out as planned.

Last week, the IAEA team based at Ukraine’s Rivne Nuclear Power Plant (NPP) observed an emergency exercise at that site. Also this week, the IAEA team at the Chornobyl site observed an emergency drill at the radioactive liquid waste treatment plant.

“Having effective emergency preparedness and response arrangements is one of the seven indispensable pillars for ensuring nuclear safety and security in an armed conflict. It is vital that the Zaporizhzhya Nuclear Power Plant tests its emergency response arrangements. We encourage  the plants in Ukraine to conduct more exercises in future to further test their emergency preparedness,” Director General Grossi said.

The ZNPP has throughout the conflict been at the centre of the IAEA’s concerns about nuclear safety and security in Ukraine. It is located on the frontline and has lost all off-site power as many as seven times. Director General Grossi told the IAEA Board of Governors on Wednesday that the situation at the plant remained challenging, with six out of the seven pillars of nuclear safety and security during an armed conflict “compromised either fully or partially”.

Earlier this week, the ZNPP’s unit 5 reached cold shutdown, leaving one of the plant’s six reactors in hot shutdown to produce steam and heating. The plant decided to move the unit from hot shutdown after boron was detected in a secondary cooling circuit, albeit at levels below the limits set by its technical specifications. No radioactivity has been detected in the secondary cooling circuit. Borated water is used in the primary coolant to help maintain nuclear safety functions.

After the cold shutdown state was reached at unit 5, the ZNPP informed the IAEA team that it will not immediately investigate the cause of the presence of boron in the secondary cooling circuit of one of the unit’s steam generators. The IAEA experts will continue to monitor this issue during its discussions with ZNPP and walkdowns of the plant. 

The IAEA experts are also continuing to gather information to fully understand why unit 6 temporarily lost power on 14 November and relied on a diesel generator for 90 minutes. They held multiple discussions on this issue with the ZNPP’s electrical department this week.

Unit 4 remains in hot shutdown to provide steam for nuclear safety related activities at the ZNPP and also for heating at the site and the nearby town of Enerhodar, where most plant staff live. Additional heating is provided by mobile diesel boilers installed at the ZNPP together with boilers located in the nearby industrial zone. Reactor units 1, 2, 3, 5 and 6 are now in cold shutdown.

Elsewhere in Ukraine, the IAEA experts at the Chornobyl site have successfully conducted a planned rotation today, with a new team arriving from headquarters in Vienna.

The IAEA teams at the Khmelnitsky, Rivne and South Ukraine NPPs and the Chornobyl site report safe and secure operations of these nuclear facilities despite the continuation of the conflict.

Source: International Atomic Energy Agency – IAEA

An International Atomic Energy Agency (IAEA) team of experts said that the operator of the Beloyarsk Nuclear Power Plant (NPP) in the Russian Federation has shown a commitment to enhancing operational safety. The team also encouraged the operator to further improve safety in areas including accident management and safety assessments.

Requested by the Government of Russian Federation, the Operational Safety Review Team (OSART) mission ran from 6 to 23 November. The Team reviewed operational safety in Unit 4 of the Beloyarsk NPP.

OSART missions independently assesses safety performance against the IAEA’s safety standards. The aim is to advance operational safety by proposing recommendations and, where appropriate, suggestions for improvement. Safety is an essential element during commissioning and the subsequent safe operation of a nuclear power plant.

The Beloyarsk NPP is located at Zarechny, in the Sverdlovsk region, roughly 1800 kilometres east of Moscow. The plant is owned by State Atomic Energy Corporation Rosatom (ROSATOM) and operated by Beloyarsk NPP, a subsidy of the Rosenergoatom Joint Stock Company. The plant consists of four units. Units 1 and 2 – both light water graphite reactors – are permanently shutdown. Units 3 and 4 are two fast neutron reactors with gross electrical capacity of 600 and 885 megawatt electrical (MW(e)), respectively. Russia has 37 nuclear power reactors in operation, providing almost 20 per cent of the country’s total electrical production. 

The team reviewed operating practices in Unit 4 in the areas of leadership and management for safety, training and qualification, operations, maintenance, technical support, radiation protection, chemistry and accident management. The team was composed of six experts from Armenia, Belarus, China and the Islamic Republic of Iran, as well as four IAEA staff members and three observers from Russia.

To make its assessment, the team reviewed documents from the Beloyarsk plant on its main technical features, staff organization and responsibilities, and its operational programmes, procedures and performance prior to the mission. During the mission, the team observed the plant in operation, examined indicators of its performance and held in-depth discussions with plant personnel.

The OSART team observed that the staff at the plant are knowledgeable and professional, and are committed to improving the operational safety and reliability of the plant. The team said that the technical exchanges with the plant’s staff were fruitful and that there was a good exchange of experience and knowledge on how the common goal of excellence in operational safety could be further enhanced.

The team identified one area of good practice to be shared with the nuclear industry globally. They said the connection used by the plant to sample gases in the reactor circuit minimizes the potential for impurities to impact the gas analysis, whilst ensuring that the gas does not escape into the work area.

The mission also provided some suggestions to further improve safety, including that:

• The plant should consider enhancing its accident management programme to include the full range of ‘beyond design’ external hazards for all modes and states of operation and all fuel locations on site.
• The plant should consider extending the scope of its probabilistic safety assessments (PSA) to ensure that all potential failure scenarios are identified to cover all operational modes, all fuel locations on site as well as the full spectrum of external hazards.
• The plant should consider improving the effectiveness of the checks carried out during field operator walkdowns, so all deficiencies and adverse conditions are identified to ensure safe and reliable operation of plant structures, systems and components.

“It is the first time an IAEA OSART mission was held at the power unit of a BN-800 fast neutron reactor,” said Ivan Sidorov, Director of Beloyarsk NPP. “For three weeks, the reviewers and the counterparts have worked hard, performing dozens of plant tours, interviews and observations, and analysing plant documentation for all reviewing areas. We appreciate the reviewers’ professional point of view, and we are ready to learn from their experience to improve safety at Beloyarsk NPP.”

The team provided a draft report of the mission to the plant management. They will have the opportunity to make factual comments on the draft. These comments will be reviewed by the IAEA, and the final report will be submitted to the Government within three months.

Background

General information about OSART missions can be found on the IAEA website. An OSART mission is designed as a review of programmes and activities essential to operational safety. It is not a regulatory inspection, nor is it a design review or a substitute for an exhaustive assessment of the plant’s overall safety status.

Follow-up missions are standard components of the OSART programme and are typically conducted within two years of the initial mission.

The IAEA Safety Standards provide a robust framework of fundamental principles, requirements and guidance to ensure safety. They reflect an international consensus and serve as a global reference for protecting people and the environment from the harmful effects of ionizing radiation.

Source: International Atomic Energy Agency – IAEA

Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) is transitioning its reactor unit 5 to cold from hot shutdown and intends to determine the cause of boron detected in a cooling circuit, still leaving one of the plant’s six reactors in hot shutdown to produce steam and heating, Director General Rafael Mariano Grossi of the International Atomic Energy Agency (IAEA) said today.

The unit’s transition to cold shutdown began yesterday and is expected to be completed later today, according to the ZNPP. Unit 4 will remain in hot shutdown. There are currently no plans to bring a second unit into hot shutdown to replace unit 5, the plant said.

Once in cold shutdown, the ZNPP will carry out tests to identify why low levels of boron were found in the secondary cooling circuit of one of the unit’s steam generators.

The ZNPP informed the IAEA experts at the site that the boron concentration in the affected cooling circuit remained below the limits permitted by its technical specifications. In addition, no radioactivity has been detected in the secondary cooling circuit. Borated water is used in the primary coolant to help maintain nuclear safety.

The ZNPP decided to move the unit to cold shutdown after one of the three 17.4 megawatt diesel boilers located off-site started operating on 17 November, providing additional heating to the nearby town of Enerhodar, where many plant staff live.

The ZNPP had been keeping reactor units 4 and 5 in hot shutdown to provide heating and steam for nuclear safety purposes on site, as well as heating for Enerhodar. The IAEA continues to follow the ZNPP’s progress to find an alternative source of steam generation. Ukraine’s national regulator, the State Nuclear Regulatory Inspectorate of Ukraine (SNRIU), issued regulatory orders in June to limit the operation of all six units of the ZNPP to a cold shutdown state.

Separately, the IAEA experts on the site are continuing to gather information to fully understand the cause of the event that occurred last week which resulted in unit 6 losing power and relying on a diesel generator for 90 minutes.

Later this week, the IAEA team has been invited to observe the ZNPP’s planned emergency exercise.

“We look forward to observing the emergency response exercise at the Zaporizhzhya Nuclear Power Plant from both the temporary emergency control centre and in the field,” Director General Grossi said. “Emergency exercises are very important for nuclear safety, especially in these times of heightened risk caused by the conflict.”

The IAEA team at the Rivne Nuclear Power Plant (NPP) last week observed an emergency exercise at that plant and today the IAEA team at the Chornobyl site observed an emergency drill at the radioactive liquid waste treatment plant.

The IAEA teams at the Khmelnitsky, Rivne and South Ukraine NPPs and the Chornobyl site report safe and secure operations of these nuclear facilities despite the continuation of the conflict.

Source: International Atomic Energy Agency – IAEA

An International Atomic Energy Agency (IAEA) team of experts said the Philippines is committed to the safe operation of the Philippine Research Reactor-1 (PRR-1) Subcritical Assembly for Training, Education and Research (SATER) facility, following completion of recent commissioning tests and the start of its utilization for training and education. The team also found the need for further improvement of the effectiveness of the reactor’s operational organization structure, its maintenance and operating procedures.

The five-day Integrated Safety Assessment for Research Reactors (INSARR) mission to the PRR-1 SATER facility was conducted at the request of the Philippine Nuclear Research Institute (PNRI), part of the Department of Science and Technology. The mission team comprised three experts from China, the Netherlands and the United States of America, and one IAEA staff member.

The INSARR team visited the PRR-1 SATER facility and met with the PNRI management.

The mission, which concluded on 17 November, reviewed regulatory supervision, the management system, and training and qualification. It also covered technical aspects, such as the commissioning results, maintenance, operating procedures, utilization and experiments, radiation protection, and emergency planning.

PRR-1 SATER is operated by the PNRI and housed in the building of the original PRR-1 – located at the University of the Philippines in Quezon City, northeast of Manila – which was shut down in 1988. Construction work on PRR-1 SATER began in 2017 and concluded in 2021. Commissioning began in June 2022, when PNRI started to load TRIGA (Training, Research, Isotopes General Atomics) fuel elements into the subcritical assembly. Following PNRI’s review of the commissioning tests, PRR-1 SATER was granted authorization for operation and began operating in March 2023.

The facility is subcritical, meaning that the chain nuclear fission reaction is initiated and maintained through an external neutron source, as opposed to a critical facility where the nuclear chain reaction is self-sustaining. The facility is used for training and education programmes initiated by PNRI at universities in the Philippines and permits researchers to conduct experiments and demonstrate neutron activation analysis and operation of a nuclear installation.

The INSARR team observed that the established practices in the use of the facility and experiments, as well as in radiation protection and waste management, are in line with the IAEA safety standards. It also noted improvement in safety documents following the commissioning tests.

“PNRI has shown a commitment to safety by requesting an IAEA INSARR mission,” said Kaichao Sun, team leader and Nuclear Safety Officer at the IAEA. “Transition from commissioning to routine operation of a nuclear installation could be challenging. Continued implementation of measures of effective leadership and management for safety, in accordance with the IAEA safety standards, ensures this challenge is addressed.”

The mission team made recommendations and suggestions for further improvements, including the need for:

• Enhancing the effectiveness of the safety committee of the facility by including in its scope the review of proposed changes in operational procedures, new experiments and modifications projects.
• Establishing procedures for qualification of the operating personnel with an assessment of the capabilities of the personnel to be authorized, including a comprehensive examination based on the training programme.
• Establishing a maintenance programme for safety-related systems and components, based on the design and surveillance requirements and manufacturers’ instructions.
• Including requirements on periodic testing of safety-related systems and components in the operational rules.  

“The PNRI requested the INSARR mission under the support of the IAEA Technical Cooperation Programme. With the recent start of operation of PRR-1 SATER, the facility operator welcomed the significant inputs from the INSARR team to improve the safety of the facility and to ensure its efficient and safe operation and utilization,” said Ryan Olivares, the reactor manager of PRR-1 SATER. “Operating this newly repurposed training facility is a significant milestone for the Philippines after almost four decades of extended reactor shutdown. Notwithstanding the significant steps undertaken and efforts invested for continuous advancement, the INSARR mission still provided the operator with valuable inputs, and the team remains committed to implement safety improvements.”

PNRI plans to request a follow-up INSARR mission in 2025.

About INSARR Missions

INSARR missions are an IAEA peer review service, conducted at the request of a Member State, to assess and evaluate the safety of research reactors based on IAEA safety standards. Follow-up missions are standard components of the INSARR programme and are typically conducted within two years of the initial mission. More information about INSARR missions can be found on the IAEA website.

The IAEA Safety Standards provide a robust framework of fundamental principles, requirements and guidance to ensure safety. They reflect an international consensus and serve as a global reference for protecting people and the environment from the harmful effects of ionizing radiation.

Source: International Atomic Energy Agency – IAEA

An International Atomic Energy Agency (IAEA) team of experts last week completed a review of long term operational safety at the Forsmark Nuclear Power Plant (NPP) in Sweden.

Unit 1 and 2 at Forsmark NPP went into commercial operation in 1980 and 1981, respectively. They were designed with an initial operational life of 40 years and entered their long term operation (LTO) phase in 2020 and 2021. Vattenfall AB, the operator, has decided to extend their operational life to 60 years.

Swedish NPP licenses are not time-limited, but regulatory consent to operate is subject to a periodic safety review every ten years.  

The mission, requested by the Swedish Radiation Safety Authority (SSM), continues a comprehensive, multi-year evaluation of the two units. In 2016, SSM invited an IAEA pre-SALTO mission to review the long term safety of the two units, followed by another pre-SALTO mission in 2019 and a follow-up mission in 2021.

During the recent ten-day mission from 7 to 16 November, the team reviewed the plant’s preparedness, organization and programmes for safe LTO of the two units. The mission was conducted by a ten-person team comprising experts from Argentina, Canada, Germany, France, the Netherlands and Switzerland, as well as two observers from Armenia and the United Kingdom and two IAEA staff members. The team met and had in depth discussions with staff from the Forsmark NPP and   conducted a plant walkdown during the review.  

“The team observed that the operator is implementing measures for safe LTO in a timely manner and the staff at the plant are professional, open and receptive to suggestions for improvement,” said team leader and IAEA Nuclear Safety Officer Martin Marchena, adding that “most of the ageing management and LTO activities are already in alignment with IAEA safety standards. We encourage the plant to address the review findings and implement all remaining activities for safe LTO as planned.”

The team identified good practices and good performances that will be shared with the nuclear industry globally, including:

• The plant developed and implemented a detailed process for the identification of components not directly important to safety that may influence intended functions of safety components.
• The plant developed and implemented a comprehensive obsolescence management programme.
• The plant developed a programme to coordinate specialist activities to foster the growth of a specialized workforce in specific areas, such as ageing management.

The team also provided recommendations to further enhance the preparations for LTO safety:

• The plant should address some of the remaining elements in plant programmes to ensure effectiveness in ageing management.  
• The plant should improve the grouping of components for implementation of ageing management activities (so called commodity groups).  
• The plant should improve ageing management programmes for civil structures, systems and components for LTO.

The plant management expressed a determination to address the areas identified for improvement and to continue its cooperation with the IAEA.

“The review has assured us that we are on the right track for safe and reliable operation in the long term perspective,” said Johan Börjesson, Deputy Managing Director at Forsmark NPP. “The results of the mission will help us to further develop and improve our abilities that will ensure safe and long operation at Forsmark. I would also like to thank the IAEA for their knowledge and efforts in order to help us improve.” 

The team provided a draft report to the plant management and to SSM at the end of the mission. The plant management and SSM will have an opportunity to make factual comments on the draft. A final report will be submitted to the plant management, SSM and the Swedish Government within three months.

Background

Information on SALTO missions can be found here.

A SALTO peer review is a comprehensive safety review addressing strategy and key elements for the safe long term operation of nuclear power plants. They complement OSART missions, which are designed as a review of programmes and activities essential to operational safety. Neither SALTO nor OSART reviews are regulatory inspections, nor are they design reviews or substitutes for an exhaustive assessment of a plant’s overall safety status.

LTO of nuclear power plants is defined as operation beyond an established time frame determined by the license term, the original plant design, relevant standards or national regulations. As stated in IAEA safety standards, to maintain a plant’s fitness for service, consideration should be given to life limiting processes and features of systems, structures and components (SSC), as well as to reasonably practicable safety upgrades to enhance the safety of the plant to a level approaching that of modern plants.

Source: International Atomic Energy Agency – IAEA

A reactor unit of Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) temporarily lost power earlier this week, forcing it to rely on an emergency diesel generator for the electricity it needs for cooling and other vital functions, Director General Rafael Mariano Grossi of the International Atomic Energy Agency (IAEA) said today.

The ZNPP is investigating the cause of the 90-minute power outage that occurred late on Wednesday at reactor unit 6. The IAEA experts at the site are also gathering information to make their own independent assessment. The affected unit is in cold shutdown, but still needs access to power. None of the ZNPP’s five other reactors lost power, three of which are also in cold shutdown, while two are in hot shutdown to generate steam and heating.

“While this was not a total loss of off-site power, as we have seen seven times before during the conflict, it once again highlights the precarious nuclear safety and security situation at the Zaporizhzhya Nuclear Power Plant,” Director General Grossi said. “The IAEA will continue to collect information so we can inform the international community about the situation at the plant.”

The day after the power outage, the ZNPP informed the IAEA experts that part of the safety system of the same unit was placed under planned maintenance.

The ZNPP continues to be connected to the electricity grid through a single 750 kilovolt (kV) main power line – out of four before the conflict – as well as a back-up 330 kV line, compared with six less than two years ago.

IAEA experts present at the ZNPP are continuing to hear explosions on a near-daily basis some distance away from the site, on the frontline of the conflict.

Separately, the IAEA experts have been informed that the chemical boron has been detected in the secondary cooling circuit of one of the steam generators of reactor unit 5, which is currently in hot shutdown. Borated water is used in the primary coolant to help maintain nuclear safety. The site has increased the frequency of boron measurements in the secondary cooling circuit of unit 5. The measurements remain relatively stable and are within the limits permitted by the reactor’s technical specifications. No radioactivity has been detected in the secondary cooling circuit.

The ZNPP stated that, as the boron concentration remains within the allowable limits, the site intends to keep unit 5 in hot shutdown, which will be reassessed after all the boilers, used for heating in the nearby town of Enerhodar, have started operating. At that time, the site will determine whether to move unit 5 to cold shutdown.

The ZNPP has been keeping reactor units 4 and 5 in hot shutdown to provide heating and steam for nuclear safety purposes on site, as well as heating for Enerhodar, where most plant staff live. The IAEA continues to follow the ZNPP’s progress to find an alternative source of steam generation. Ukraine’s national regulator, the State Nuclear Regulatory Inspectorate of Ukraine (SNRIU), issued regulatory orders in June to limit the operation of all six units of the ZNPP to a cold shutdown state.

In other activities conducted by the IAEA experts over the past week, the team performed – for the first time – a walkdown on Wednesday of all six main reactor control rooms at the ZNPP, one after the other. It provided the team with an opportunity to gather more information about staffing there and to confirm the status of each reactor unit.

“This has been a positive development regarding access. I strongly encourage the plant to ensure that timely access and information sharing take place regularly. It will enhance our capability to report about the overall situation at the plant,” Director General Grossi said.

The same day, the IAEA experts also conducted a walkdown of the turbine hall of unit 5, but their access was partially restricted, as was the case also during a visit to the turbine hall of unit 1 last week, and of the turbine halls of units 1, 2, 4 and 5 during walkdowns in October. The IAEA experts continue to request access to all six turbine halls together as part of their activities to monitor compliance to the seven indispensable pillars and the five concrete principles for protecting the ZNPP.

Following last month’s closure of the reactor vessel of unit 3, the plant informed the IAEA experts this week that testing of the reactor’s primary cooling circuit was completed, and pressure testing of the secondary cooling circuit is expected to be completed in the coming days.

Over the past week, up to seven of the nine mobile diesel boilers installed at the ZNPP to provide additional heating during the winter have been in operation most days. Their usage depends on the requirements for steam at the plant and for heating in Enerhodar.

Elsewhere in Ukraine this week, IAEA experts observed an emergency exercise conducted at the Rivne Nuclear Power Plant (NPP) on 15 and 16 November, which also included support from staff at the South Ukraine and Khmelnitsky NPPs. The IAEA has teams continually present at these three plants, who followed the different aspects of the exercise, at the Rivne NPP from both the onsite and offsite emergency control room.

During the exercise, the SNRIU – the Ukrainian Competent Authority under the Convention on Early Notification of a Nuclear Accident and the Convention on Assistance in the case of a Nuclear Accident or Radiological Emergency – shared information with the IAEA’s Incident and Emergency Centre.

Following the emergency exercise, the Rivne NPP conducted a debriefing to discuss the conduct of the exercise, document lessons learned and to identify areas for improvement.

The ZNPP plans to conduct an emergency exercise next week, which the IAEA team will also observe.

The IAEA teams at the Khmelnitsky, Rivne and South Ukraine NPPs and the Chornobyl site report safe and secure operations of these nuclear facilities despite the continuation of the conflict.

Source: International Atomic Energy Agency – IAEA

International Atomic Energy Agency (IAEA) experts have been informed that 21 natural gas boilers have been installed at the industrial zone nearby Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) as part of measures to provide additional heating during the winter, including for the nearby city of Enerhodar, Director General Rafael Mariano Grossi of the International Atomic Energy Agency (IAEA) said today.

The IAEA Support and Assistance Mission to Zaporizhzhya (ISAMZ) team confirmed that the new gas boilers can provide an extra 57MW of heating. In addition, all nine mobile diesel boilers, located at the ZNPP, have been in operation most days to generate the heating needed as the autumn weather gets colder prior to the onset of winter for the plant and the nearby city of Enerhodar.

The ISAMZ team have learned that the three large capacity diesel boilers located at the Zaporizhzhya Thermal Power Plant (ZTPP) and at the industrial zone are planned to be converted to natural gas within the next month. Additional heating is provided by the ZNPP units 4 and 5 in hot shutdown, which also produce the steam required for nuclear safety and security related activities at the ZNPP, and by over 50 mobile boilers located throughout the city of Enerhodar.

Ukraine’s national regulator, the State Nuclear Regulatory Inspectorate of Ukraine (SNRIU), issued regulatory orders in June to limit the operation of all six units of the ZNPP to a cold shutdown state. Units 1, 2, 3 and 6 are currently in cold shutdown.

“With the continuing precarious nuclear safety and security situation at the Zaporizhzhya nuclear power plant, the team will monitor closely the efforts taken to prepare for the difficult coldest months of the year,” Director General Grossi said. “Our presence remains essential.”

During the past week, the new team of IAEA experts who recently crossed the frontline to begin their rotation at the ZNPP heard explosions outside the plant on a near-daily basis, highlighting the dangers posed by an armed conflict in such close proximity to a nuclear power plant.

The team was informed of the maintenance activities being performed in recent days. Pressure testing of unit 3’s steam generators – a necessary procedure following the closure of its reactor vessel, which had been left open for over 18 months – was completed successfully and sealing of the steam generators is being performed. The ZNPP informed the IAEA experts today that maintenance is being performed on the primary circuit this week, after which final pressure testing will be conducted on it.

ZNPP also informed the IAEA that maintenance of the number 1 safety train of unit 6 would take place in the near future. ZNPP reactors each have three separate and independent redundant systems – known as safety trains – comprising the units’ safety systems, which are normally in stand-by mode ready to activate if needed to maintain safety. Maintenance on the other two safety trains was conducted in October.

During the past week the team was informed that maintenance of the main unit transformers of units 1, 2 and 3 will commence this week, similar to that recently performed on the unit transformers of units 4, 5 and 6.

The IAEA has been concerned that some of the maintenance activities that have been carried out on the safety systems of the reactor units may have been  incomplete, warranting additional maintenance to be carried out. This was apparent in July and August after unit 4 was placed in hot shutdown following maintenance on its safety systems. However, after unit 4 was returned to cold shutdown in August due to a water leak in one of the steam generators, further maintenance was also required to clean the heat exchangers of the unit’s safety systems.

“As a result of the ongoing conflict, the Zaporizhzhia Nuclear Power Plant, Europe’s largest nuclear power plant, has not been able to maintain a comprehensive systematic maintenance programme, especially due to the reduction of experienced maintenance staff,” Director General Grossi said. “Nuclear safety and security remain at risk the longer the plant has reduced levels of trained and experienced staff. It is not a sustainable situation for Europe’s largest nuclear power plant”.

The IAEA team at the site continues to perform daily walkdowns. On 7 November, during a visit to the main control room, emergency control room and electrical room of unit 3, the team confirmed the unit’s cold shutdown status. A walkdown of the emergency diesel generators of units 1 and 2 was conducted on 8 November and on 10 November, respectively, the IAEA experts also visited the ZNPP cooling pond and cooling towers and confirmed the integrity of the isolation gates.

The Agency continues to stress that it needs access to all six turbine halls to assess safety but again on November 10 the experts at the site were prevented from visiting parts of the turbine hall of unit 1, after receiving similar restricted access to the turbine halls of units 1, 2 and 4 during walkdowns in October.

During walkdowns of the site perimeter on 3 and 5 November, the team did not observe any mines or explosives, including in areas where they had been previously observed.

Outside of the perimeter of the site, the IAEA visited the three large diesel fuel storage tanks at the storage facility. This stored fuel is required to run the 20 emergency diesel generators at the ZNPP for at least 10 days. The storage facility is also being used to supply fuel for the mobile diesel boilers. The team was informed of the amount of fuel in the tanks and observed the filling of trucks taking diesel fuel to the mobile boilers.

Regarding the water used at the site for reactor cooling and other nuclear safety and security functions, the ZNPP confirmed that insulation of the 11 groundwater wells was ongoing. The wells feed approximately 250m³/h of cooling water to the sprinkler ponds for reactor cooling. Insulation works are planned to be completed by the end of November. The IAEA experts were also informed that the power supply for the pumps in the wells is provided by the essential electricity consumer outlets. In case of a loss of off-site power, the IAEA experts were informed that the pumps from the wells can be powered through the two common emergency diesel generators, thus ensuring the availability of cooling water if all off-site power was lost.

The IAEA team at the site learned that the ZNPP emergency exercise is planned to be conducted later in November. The last major exercise at ZNPP was conducted in November 2021, prior to the start of the conflict. Since that time, there has been an unprecedented change in the number of the ZNPP staff which could impede the site’s ability to be able to effectively respond to emergency situations. The Agency stresses the need for the ISAMZ team to be permitted to observe the upcoming exercise and to receive the lessons learned from the exercise.

As part of its work at the site, the IAEA continues to gather information on the status and condition of staff. This includes building an understanding of the training and licensing of operating staff at the plant under Russian Federation regulations.  The IAEA experts visited the ZNPP training centre on 7 November and gathered more information regarding the number of trainers and their training processes.

In terms of regulatory functions at the site, the IAEA was also informed this past week that Rostekhnadzor, the Russian regulatory body for nuclear and radiation safety, is establishing a more permanent presence at the ZNPP with the arrival at the site of the Head of ZNPP Nuclear and Radiation Safety Inspections. The team was informed that the intent is to provide constant supervision and regulatory control of the nuclear power plant (NPP), in accordance with Russian state laws and to give licenses to the employees.

Separately last week, the IAEA conducted successful rotations of its teams at the Chornobyl site, and the Rivne, Khmelnitsky and South Ukraine NPPs. The teams each reported the safe and secure operations of these nuclear facilities.

The IAEA team at Khmelnitsky NPP observed a plant-wide emergency response exercise on 11 October, noting at the time that the exercise was well planned and implemented and that emergency response arrangements appeared to be effective. During the past week the Agency’s experts were informed that the follow-up activities for the exercise were conducted and an action plan has been developed for the identified areas of further improvement, including on- and off-site communication, fire protection, and decontamination.

Additionally, over the last week, the IAEA conducted a medical and coordination assistance mission in Ukraine. The team visited the Chornobyl site, Slavutych Municipal Hospital and the Slavutych local center that provides mental health support for staff at Chornobyl. The team also met various authorities in Kyiv to discuss the coordination and collaboration on the overall technical support and assistance to Ukraine, including on the mental health support programme.

The team noted progress in recent months in various areas impacted by the armed conflict owing to the support provided through the Agency, as well as through other bilateral or multilateral arrangements and from the national authorities, but noted the difficult and improvised living conditions of the operating staff at the Chornobyl site. Staff are required to sleep in adapted living conditions and in unventilated and humid premises, in rooms often accommodating six persons or more, which lack the basic supplies.

“Such a situation is taking its toll on the physical and mental health of the operating staff and is not sustainable in the longer term” Director General Grossi said.

Also in the last week the Agency arranged the 32nd delivery of equipment to Ukraine. The equipment was donated by Canada under the IAEA Response and Assistance Network, RANET. This delivery was the second shipment of equipment from Canada, and one additional and final shipment is in preparation. With this delivery the Rivne and South Ukraine NPPs, Chornobyl, as well as the Public Health Centre of Ministry of Health, the State Register of Ionizing Radiation Sources and Individual Radiation Doses and SNRIU, received personal protective equipment, IT equipment, potassium iodide pills, first aid kits and similar items.

Source: International Atomic Energy Agency – IAEA

The International Atomic Energy Agency (IAEA) and the International Civil Aviation Organization (ICAO) have agreed to enhance their cooperation around the transport of radioactive materials by air, notably to improve the efficiency and speed of these shipments that are vital for cancer care and other medical uses around the world.

In a joint statement signed today, IAEA Director General Rafael Mariano Grossi and ICAO Secretary General Juan Carlos Salazar and underscored that the agreement also “highlights the importance of adherence to the IAEA safety standards for the safe use of radioactive materials and to ICAO standards for global civil aviation safety and security.”

The agreement builds on the cooperation between both UN bodies on matters of common interest that began in 1960.

Nuclear medicine is based on access to radiopharmaceuticals for a variety of diagnostic uses and specific therapies. Getting radiopharmaceuticals from the manufacturer to hospitals and medical clinics depends on fast and reliable transport, including by air. Over 10,000 hospitals worldwide use radioisotopes in medicine, mostly for diagnosis.

“The IAEA’s role in ensuring the safe transport of radioactive material by air is essential in the carriage of short-lived radiopharmaceuticals and other crucial radioactive materials,” remarked ICAO Secretary General Salazar. “ICAO welcomes the heightening of our collaboration in this vitally important area of mutual interest.”

IAEA Director General Grossi said: “It is very important that the work the IAEA and ICAO undertake in developing and strengthening the implementation of international standards is complementary. The IAEA greatly values ICAO’s long-standing contribution to the development and review of IAEA safety standards. We can work even more closely together in other areas of common interest, such as in reducing denials of, and delays in, shipment of radioactive material by air.”  

The agreement encompasses the development and review of relevant IAEA safety standards and the harmonization of best practices globally, with the IAEA and ICAO collaborating to collect and analyse associated information.

Raising stakeholder awareness through education, training, and outreach are also foreseen, including around emergency preparedness.

Radiation research and information exchange towards radiation protection in civil aviation, especially regarding cosmic radiation exposure to flight crews, is a further focus of the agreement.

Today’s joint statement highlights that the “stronger mutual cooperation will create a conducive environment for countries to harness the benefits of the peaceful uses of nuclear technology in meeting the United Nations Sustainable Development Goals,” and helps set the stage for deeper collaboration in the near future.