The incident is not included in the international scope of INES, and nuclear accidents and accidents are classified according to their radiological risks. There is no doubt that it is more complicated in politics than in industry or the environment.
EDF experts provided technical details about the EPR 1 reactor incident that occurred at the Taishan plant in southwestern China on Monday, June 14. A few hours ago, American TV Channel CNN According to the report, on June 8, Famatong, a subsidiary of American Power Corporation and the designer of the third-generation reactor, issued a warning to the US authorities about this failure. Two of the reactors have been operating on-site in China since 2019.
“We are not in an accident dynamic with a melting heart”, A spokesman for the French group said, thus relativizing the severity of the problem, even if Chinese operators have to “Achieving Atmospheric Emissions” Rare gas “In line with the regulatory restrictions defined by the Chinese security department”He added that it is the fuel assembly cladding that is the source of the escape of xenon and krypton from the main pressurized water circuit of the reactor building during fission.
The sealing problem occurred in October 2020, when the Taishan No. 1 reactor restarted after refueling, and the uranium pellets were embedded in the metal cladding. EDF stated that at this stage, based on information provided by Chinese partners, “It is too early to say whether the reactor must be shut down to solve the problems found.”.
Such incidents have already happened in France. “According to the operating procedures, these rare gases exceed a certain concentration threshold, and the reactor must be shut down. Recalled Karine Herviou, deputy director of the Institute of Radiation Protection and Nuclear Safety (IRSN). We have no information about this threshold and whether it has been reached. When such an incident occurred in France, the EDF had not yet reached the threshold set by the operating rules, and the defective bars could only be removed until the end of the cycle. “
How to explain such an event? “This may be due to a manufacturing defect in the sheath or “Immigration agency“ (Moving screw…), Answer MI Hervio. Obviously, as Taishan’s #1 reactor is a seed [c’est même le premier EPR mis en service dans le monde], We will pay close attention to this matter. ” According to her, empirical feedback should be particularly beneficial to EPR in Flamanville (Mansh), whose connection to the network is now planned for 2023.