Category: Nuclear Energy

Source: International Atomic Energy Agency – IAEA

International Atomic Energy Agency (IAEA) experts at Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) have not yet been given access to the reactor halls of units 1, 2 and 6, hindering their ability to monitor the nuclear safety and security situation at the plant, as well as the five concrete principles established at the United Nations Security Council, IAEA Director General Rafael Mariano Grossi said today.

Following a successful rotation of IAEA experts yesterday – the fifteenth team of experts to arrive at the plant since the IAEA Support and Assistance Mission to the ZNPP (ISAMZ) was established in September 2022 – the new team repeated the request for access to the reactor hall of unit 6.

The ZNPP did not give permission for that access today, stating that the reactor hall is “sealed”. The ZNPP informed the team that it was not denying access and has instead proposed that the team access the area in about a week’s time.

In December 2023, the ISAMZ team was refused access to the reactor hall of units 1, 2 and 6 which was the first time that the IAEA experts have not been granted timely access to a reactor hall that was in cold shutdown. Until then, all ISAMZ teams had been able to access the reactor hall of any unit in cold shutdown, without the plant making any reference to the status of containment as being “sealed”.

“These restrictions on the experts’ timely access to the ZNPP are impeding the IAEA’s ability to assess the safety and security situation, including confirming the reported status of the reactor units, spent fuel ponds and associated safety equipment, independently and effectively,” Director General Grossi said.

Also, since 18 October last year, ISAMZ teams have been unable to access parts of the turbine hall of each unit. Most recently, access was again restricted at the turbine halls of units 1 and 2 on Wednesday, 10 January.

“The nuclear safety and security situation remains very precarious, and I reiterate my request for unhindered access so that the IAEA can assess the Seven Pillars for nuclear safety and security and monitor adherence to the five concrete principles to help ensure nuclear safety and security at the ZNPP in order to prevent a nuclear accident and ensure the integrity of the plant,” Director General Grossi added.

The new team of IAEA experts will observe the ongoing maintenance situation at the ZNPP. Following observation of deposits of boric acid on the valves, a pump and on the floors of several of the safety system rooms of unit 6 on 22 December, the IAEA team conducted a follow-up walkdown on 9 January to assess the status. Borated water is used in the primary coolant to help maintain nuclear safety functions. Although leaks may occur, prompt investigation, repair, and clean-up are crucial to prevent further damage and avoid any impact on safety.

During its walkdown, the team noted a significant reduction in boric acid deposits compared to the December 22 walkdown, with the leak also considerably diminished. However, some deposits persisted in three rooms of the unit 6 containment building, one at the same level and two showing significantly reduced levels.

The team was informed that the cause of the leak was due to micro-cracks in the boron tank due to ageing, and a blockage in the leak detection pipe. Whilst the blockage has been repaired, some smaller leaks persist as a result of the micro-cracks in the boron tank. The ZNPP stated that the leak rate is currently within technical specifications, and that the micro-cracks can be repaired after draining the tank, which will be addressed during scheduled maintenance. The IAEA team will continue to monitor the situation.

Additionally, this week the IAEA experts at the ZNPP accessed the pumping stations for units 3 and 4 and the main control rooms of units 1 to 6. All nine mobile diesel boilers installed at the plant were utilised during the past week to provide additional heating needs during winter. 

As the winter weather gets colder, IAEA experts reported that the ambient temperature at the ZNPP has dropped as low as -10°C in the mornings. The team reported that this fall in temperature had no impact on the operation of the 11 wells providing cooling water for the sprinkler ponds used for reactor cooling and other nuclear safety and security functions. The flow level of water remained constant.

Five of the ZNPP’s six reactors remain in cold shutdown, while unit 4 is in hot shutdown to produce steam and heat, including for the nearby town of Enerhodar, where most plant staff live.

The new ISAMZ team continues to pay close attention to the staffing situation at the plant, in particular the staff operating in the main control rooms and those responsible for maintenance of critical safety infrastructure and processes. 

Today, the new team of experts conducted a walkdown of the site including the four new diesel boilers. They observed the new equipment and were informed that the installation has been completed and commissioning activities have commenced. These new diesel boilers are intended to generate steam to meet the ZNPP’s needs.

In daily reminders of the physical proximity of the conflict to the ZNPP, the IAEA experts there continue to hear loud explosions at varying distances to the plant.

The IAEA teams at the Rivne, Khmelnitsky, South Ukraine nuclear power plants (NPPs) and the Chornobyl site continue to report that nuclear safety and security is maintained despite challenges related to the multiple missile attacks on Ukraine in the past week.

The IAEA experts at the Khmelnitsky NPP were once again required to take shelter several times over the weekend of 6 and 7 January. The teams at the Rivne and South Ukraine NPPs were also required to take shelter last Saturday.  At the Chornobyl site, the team reported hearing explosions in the distance throughout the past week.

Director General Grossi has reiterated that everything should be done to prevent a nuclear accident during this war. “It is essential that nuclear power plants and their related infrastructure are not impacted. No one would gain from a nuclear accident and it must be avoided,” he said.

Also this week, the IAEA delivered radiocommunication systems to the Rivne and South Ukraine NPPs. The equipment was procured using funding from the United Kingdom. This was the 34th IAEA delivery of nuclear safety and security-related equipment to Ukraine that aims at ensuring diverse and reliable communication means are available at the sites when needed.

Source: International Atomic Energy Agency – IAEA

Kenya has made significant progress in the development of the national nuclear infrastructure for the country’s new research reactor programme, according to an International Atomic Energy Agency (IAEA) review mission.

An IAEA team of experts concluded a nine-day mission to review the preparations for a research reactor programme in Kenya. The Integrated Nuclear Infrastructure Review for Research Reactors (INIR-RR) was conducted at the invitation of the Kenyan Government, from 11 to 19 December 2023.

Mission team members reviewed the status of the country’s nuclear infrastructure development in accordance with the Phase 1 criteria and conditions of the IAEA’s Milestones Approach for research reactors.

Some countries embarking on a nuclear power programme, including Kenya, are pursuing the development of their first research reactor, which can serve as a stepping stone towards their future nuclear power programme. Kenya plans to commission its first research reactor between 2030 and 2034.

Recommendations and suggestions were provided by the IAEA team for the further development of the nuclear infrastructure for the new research reactor programme.

“Kenya has demonstrated a sustained and very professional approach to the development of its research reactor programme,” said Andrey Sitnikov, who led the IAEA review mission and is the Technical Lead of the IAEA Research Reactor Section. “We noted that before making the final decision, Kenya did a great job of developing and preparing laws and regulatory documents, actively involving interested stakeholders in the programme, and developing human resources of both the future operator and the regulator.

The INIR-RR review team comprised two experts from India and the United States of America, and six IAEA staff members.

About INIR-RR missions

INIR-RR missions are designed to assist countries in determining the status of their national nuclear infrastructure and to identify further development needs to support a new research reactor project. They follow the IAEA’s Milestones Approach for research reactors, which provides guidance on the preparation of a research reactor project by addressing 19 issues, ranging from nuclear safety and security to the nuclear fuel cycle, waste management, and funding and financing.

Source: International Atomic Energy Agency – IAEA

The International Atomic Energy Agency (IAEA), in cooperation with Argentina, launched its first scientific research expedition today to investigate the presence of microplastics in Antarctica as part of efforts to combat this growing environmental problem, even in the planet’s most remote areas.

The President of Argentina, Javier Milei, and IAEA Director General Rafael Mariano Grossi joined the IAEA scientific team at the Marambio and Esperanza Argentine Antarctic Bases to mark the start of their mission. Defence Minister Luis Petri, Interior Minister Guillermo Francos and Foreign Minister Diana Mondino were also present. The two-person research team will then set off for one month to assess the impact of microplastics by investigating its occurrence and distribution in seawater, lakes, sediments, sand, discharge water and animals of the Antarctic ecosystem near the Argentine Carlini scientific research station.

The IAEA mission to Antarctica, the world’s southernmost continent, is being carried out through the IAEA’s NUTEC plastics initiative. Established in 2020, NUTEC is an IAEA flagship initiative to fight plastic pollution with nuclear technologies. Through a network of NUTEC Plastic Monitoring Laboratories, nuclear and isotopic techniques are being used to produce data on marine microplastics distribution by sampling and analysing the prevalence of microplastics in the environment. These precise scientifi­c data represent important information for developing plastic mitigation and disposal measures and policies.

The first evidence of microplastics – plastic particles below 5 mm in diameter- found in Antarctic coastal fast ice, dates to 2009 when researchers from the University of Tasmania sampled sea ice in East Antarctica.  However, there is still almost no information available on where and how much microplastics arrive in the Antarctic and how much is taken up by Antarctic organisms. There is also very little data existing on the types of microplastics reaching this pristine area through ocean currents, atmospheric deposition and the presence of humans in the Antarctic.

At an event to launch the mission on 5 January at the Argentine Antarctic Base Marambio, Director General Grossi said that the discovery of microplastics in the once untouched Antarctic environment serves as a testament to the influence of the widespread and detrimental pollutant. “Microplastics are a global problem, but the international community still lacks the scientific data needed to make informed decisions. This is the goal of NUTEC plastics: by understanding the plastic origin, movement and impact, we can make informed decisions on how to address the problem.”

The presence of microplastics can contribute to accelerating the ice-loss in Antarctica by reducing ice reflectivity, altering surface roughness, promoting microbial activity, acting as thermal insulators, and contributing to mechanical weakening of the ice structure. When combined with climate change, atmospheric conditions, and oceanic influences, the presence of microplastics will deepen the devastating impact of polar ice melting in Antarctica. In addition, microplastics entering the food chain of Antarctic organisms negatively affects the health of Antarctic life and their resilience to climate change.

International Treaty 

In a resolution from March 2022, Member States of the United Nations pledged to initiate negotiations for a new global treaty on banning plastic pollution including in the marine environment, with the objective of formal adoption by 2025.

The IAEA’s expanding NUTEC network of laboratories for monitoring marine (micro-) plastic pollution, including in polar areas, will play a crucial role in providing essential scientific evidence to support for informed decision-making during the treaty negotiations and contribute to its effective implementation, particularly in the marine environment.

Director General Grossi emphasized, “the well-being of Antarctica, a true wilderness on Earth, is vital for the overall health of the planet. Extending our presence throughout the globe, we have brought our specialized expertise to Antarctica where our efforts can bring about much needed change.”

Harnessing the precision of nuclear science

Over the next month, two IAEA experts will monitor the presence of microplastics in the environment at 22 sites near the Carlini research base in different environments: the Antarctic Ocean water, Antarctic lakes, and Antarctic land. They will take seawater samples from 12 sites, sediment samples from four sites, three samples from lakes and sample three different sandy beaches. The team will also monitor the presence of microplastic in organisms by collecting clams and limpets, and the faeces of penguins.

The IAEA’s work to address and monitor the presence of microplastics in Antarctica is carried out in cooperation with Argentina’s Instituto Antartico Argentino (IAA), the office in charge of advising, addressing and performing scientific and technical research and studies in Antarctica, and the Dirección Nacional del Antártico (DNA) which is responsible for guiding, directing and controlling scientific and technical activity in the Antarctic.

During the next month, samples will be collected and prepared by the IAEA team and sent to the IAEA’s Marine Environment Laboratories in Monaco to be analysed. Vibrational spectroscopy will be used to count the number of microparticles of plastic and to characterize the type of polymers to potentially assess the source of microplastic pollution.

Samples will also be sent to the IAA in Buenos Aires where, under the NUTEC initiative, a state-of-the-art microscope and a spectrometer have been installed, as well as a series of trainings provided, to strengthen Argentina’s microplastics research capabilities.

Since its establishment in 1961, the IAEA Environment Laboratories in Monaco have provided IAEA Member States with the tools and knowledge necessary to understand and tackle pressing marine environmental challenges. The IAEA hosts the only marine environment laboratory of the UN system.

NUTEC Plastics (NUclear TEChnology for Controlling Plastic Pollution) builds on the IAEA’s efforts to deal with plastic pollution through recycling using radiation technology and marine monitoring using isotopic tracing techniques. It provides science-based evidence to characterize and assess marine microplastic pollution, while also demonstrating the use of ionizing radiation in plastic recycling, transforming plastic waste into reusable resources.

Source: International Atomic Energy Agency – IAEA

Following discussions with the International Atomic Energy Agency, Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) has taken action to ensure an immediate supply of back-up electricity in case its main external power line is lost, as has happened repeatedly during the military conflict, IAEA Director General Rafael Mariano Grossi said today.

Frequent power cuts have remained a source of serious concern for safety and security at Europe’s largest nuclear power plant (NPP) as it needs electricity to cool its reactors and for other essential functions, even when all reactor units have been shut down. Since August 2022, the ZNPP has suffered eight events with a complete loss of off-site power.

When the ZNPP’s only remaining 750 kilovolt (kV) line is cut, the plant may still have access to off-site power through a 330 kV back-up line, if it remains connected to the grid. However, since mid-2023, this line has required manual intervention to become operational.

In discussions with the plant, the IAEA experts present at the ZNPP stressed that it was important for nuclear safety and security to address this matter. As a result, the plant carried out work on its back-up electrical transformers and two out of three are now operational, of which one is permanently connected to the on-site back-up power lines – known as busbars – of all six reactor units.

“This means that if the main power supply through the 750 kV switchyard is lost, the back-up line will automatically be able to provide electricity to the plant without manual, and hence delayed, intervention, provided it remains operational,” Director General Grossi said. “This is a significant development, as it enables independence and redundancy in the site’s power supply scheme, even though the overall off-site power situation at the Zaporizhzhya Nuclear Power Plant remains extremely fragile. This solution will only be effective if the 330 kV power line remains available, which – as we know from experience – is far from guaranteed.”

Underlining the continued dangers facing the plant, the IAEA team has in recent weeks continued to hear regular explosions some distance away from the site.

Five of the ZNPP’s six reactors remain in cold shutdown, while unit 4 is in hot shutdown to produce steam and heat, including for the nearby town of Enerhodar, where most plant staff live.

The IAEA team has continued to conduct walkdowns across the site as part of activities to monitor the nuclear safety and security situation at the ZNPP, as well as adherence to the five concrete principles for the protection of this major facility.

However, the IAEA experts remain unable to gain access to all parts of the site, and for the past two weeks they have not been allowed to access the reactor halls of units 1, 2 and 6. This is the first time that IAEA experts have not been granted access to a reactor hall of a unit that was in cold shutdown. This is where the reactor core and spent fuel are located. The team will continue to request this access.

In addition, access to some parts of the ZNPP’s turbine halls continues to be restricted, including those areas of reactor units 3, 4 and 6 over the past week. Also, the IAEA experts still await the access to the reactor rooftops planned on 19 December that didn’t happen due to stated security concerns.

In a separate development during a walkdown of the safety system rooms of unit 6 on 22 December, the IAEA experts observed boric acid deposits on valves, a pump and on the floors of several rooms in the containment building. The plant informed the team that the source of the leak is one of the boric acid storage tanks and that considering the small magnitude of the leak it is not planned to be repaired immediately, but rather as part of the planned maintenance of the impacted system. This type of leak can occur during the operation of a plant. However, this kind of event requires proper and timely attention, investigation and response from the operator, to prevent further and potentially more severe safety implications. The team will closely follow developments regarding this issue.

As reported earlier, the IAEA team continues to ask the plant for the maintenance schedule for 2024, which has not yet been provided.

The IAEA team has over the past two weeks continued to observe progress in the installation of four mobile diesel boilers at the site. As reported previously, the new units will generate additional steam needed for various nuclear safety functions at the site, including for waste treatment.

The site currently has nine mobile boilers, of which at least eight have been operating, providing additional heating during the winter.

The IAEA teams of experts at the Rivne, Khmelnitsky, South Ukraine NPPs and the Chornobyl site continue to report that nuclear safety and security is being maintained, despite wide-ranging missile attacks on Ukraine in the past week, which forced the IAEA experts at the Khmelnitsky NPP to take shelter three times.  

The IAEA experts at the Rivne NPP were informed that a cruise missile flew close to the plant on 29 December, and their colleagues at the South Ukraine NPP were informed that missiles and drones crossed the region where the plant is located.