![]() ![]() In this way, a massive amount of thermal energy can be created by such chain reactions of nuclear fission. These neutrons are absorbed by other uranium nuclei, such that nuclear fission occurs continuously in this chain-linked manner. At this time, two or three neutrons are emitted from the nucleus of the uranium-235. ![]() In the reactor, the uranium-235 absorbs neutrons to cause nuclear fission, resulting in the release of a large amount of thermal energy. In a 1.1 million-kW boiling water reactor, 764 of these fuel assemblies are loaded into the nuclear reactor. Numerous of these rods are then bundled together to create a fuel assembly. These are then loaded into a long alloy-construction tube called a fuel rod. It then undergoes various processes until it can be baked into hard pellets with an approximate diameter and height of approximately 1 cm each. As natural uranium contains only approximately 0.7% uranium-235, it is concentrated until this ratio reaches approximately 2% to 4%. “The number of indiscriminate attacks hitting civilian infrastructure, killing and injuring civilians, have reached unimaginable levels – these attacks violate international humanitarian law,” she added, calling on Russia to stop indiscriminate attacks.Uranium functions as fuel for nuclear power stations with uranium-235 used for nuclear fission. “It is utterly inadmissible,” Denise Brown said. Attack targeting hotel in ZaporizhzhyaĪlso on Thursday, the UN Humanitarian Coordinator for Ukraine said that a hotel, frequently used by UN and Non-Governmental Organizations (NGOs) personnel was hit by a Russian strike in Zaporizhzhia. They added that the safety and security at the facilities were not affected. Meanwhile, IAEA teams at other Ukrainian nuclear power plants – Khmelnitsky, Rivne, and South Ukraine, as well as the Chornobyl site – reported air-raid alarms on Wednesday. The experts were informed by ZNPP that a drone was spotted and intercepted near the city of Enerhodar on Wednesday, but confirmed it had no impact on the plant’s safety. While the team did not observe mines or explosives in any new locations during the past week, they did confirm the presence of the mines previously observed on 23 July, IAEA added. In one of the visits, on Tuesday, to the main control room, emergency control room and other safety-related rooms, the team did not observe any mines or usual objects in the main control but in the turbine hall of unit 2, they noted the presence of a number of military trucks parked in an area reserved for vehicle maintenance. IAEA experts at the nuclear power plant have also conducted multiple walkdowns in different parts of the site, including visits to spent fuel storage and reactor control rooms, the agency said. Grossi said.Īvailability of cooling water remains relatively stable, with measures to mitigate water loss from the cooling pond by pumping in water from the ZNPP inlet channel. “The repeated power line cuts underline the continuing precarious nuclear safety and security situation at the plant,” Mr. NRCs regional offices implement this program in the states. The ZNPP had to rely on 330 kV backup line, to supply the electricity required, for example, to perform safety functions such as pumping cooling water for the plant and there was no total loss of off-site power to the site and emergency diesel generators were not needed.Īccording to IAEA, the nuclear power plant has been experiencing major off-site power problems since the conflict began in February 2022, exacerbating the nuclear safety and security risks facing the site currently located on the frontline. The Office of Nuclear Reactor Regulation has overall responsibility for NRCs reactor program. Grossi reported that there were power disruptions on Thursday after the 750kV power line disconnected twice during the day. The ZNPP is controlled by Russian forces but operated by its Ukrainian staff. The IAEA has been monitoring the situation at Europe’s largest nuclear power plant since the early days of the conflict. “The IAEA team on the site will closely monitor the operations for the transition between the shutdown states of Units 4 and 6,” said Mr. Unit 6 had been in cold shutdown since 21 April to facilitate safety system inspections and maintenance. There was no radiological release to the environment, the statement noted, adding that over the next three days, the nuclear power plant will move unit 6 to hot shutdown to continue steam production. The purpose of placing reactor unit 4 in cold shutdown is to investigate the exact cause of the leak and carry out necessary maintenance to repair the affected steam generator, according to a statement by Rafael Mariano Grossi, IAEA Director General. ![]()
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