World Nuclear Nuclear Incident on Taishan EPR in China: The Cause Identified

12:05  28 november  2021
12:05  28 november  2021 Source:   leparisien.fr

The nuclear nuclear is needed in the presidential campaign

 The nuclear nuclear is needed in the presidential campaign while the right and far-right candidates defend without hesitation the construction of new reactors, those on the left are more divided on the part to be granted to this energy in the ecological transition . © Provided by the world The President of the Republic, Emmanuel Macron, during the presentation of the France 2030 investment plan, at the Palais de l'Elysee, in Paris, on October 12, 2021.

Cette centrale EPR située à Taishan, en Chine, est la seule en service dans le monde. AFP/Xinhua © AFP This EPR plant located in Taishan, China, is the only one in service in the world. AFP / Xinhua The incident that led in July to the stop of a reactor at the Taishan Nuclear Power plant (China) would be due to a vessel design of the tank. This is said Saturday La Circirarad (Independent Research and Information Commission on radioactivity). It warns against the risk of identical problem on other EPRs, pressurized reactors. Association created in the aftermath of the Ukrainian reactor disaster of Chernobyl in 1986, the CRIIRAD wrote Saturday to the management of the Nuclear Safety Authority (ASN) to inform him of this information that it says to hold a " alert launcher ". "This is a Frenchman who works in the nuclear industry, having access to very specific technical elements on the situation of the heart of the reactor of Taishan 1," said Bruno Chareyron, director of the Laboratory of Criirarad. The Chinese operator CGN, the main operator of the plant (70% of the Units) with EDF (30%), announced on July 1 "Stop for maintenance" the reactor 1 of the Nuclear power plant EPR de Taishan, near Hong Kong, the only EPR installation currently in service in the world. The incident was reported on June 14: a small number of damaged uranium fuel bars ("pencils") caused an accumulation of radioactive rare gases in the primary, waterproof circuit of the plant. The authorities had qualified the phenomenon of "current" and dismounted any danger. Doubts from 2007-2008 In his mail, whose AFP has obtained a copy, the written CRIIRAD, on the basis of information transmitted by this alert launcher, that these "degradations observed on the nuclear fuel assemblies (...) are mainly due to abnormal vibrations "of these assemblies. These vibrations "would be linked to a defect in the design of the vessel of the EPR sector. According to the CRIIRAD, the "results of 0.2 model tests" in the French nuclear enterprise Framatome at Creusot (Saône-et-Loire), would have revealed, from 2007-2008, these shortcomings on the hydraulics of the tank . The association thus asks the ASN, among others, if it has been informed "the detection of an abnormal level of vibration of pencil assemblies in Taishan". It also challenges it on Flamanville's EPR (Manche), under construction: Should not it "impose to EDF to change the tank cover before any divergence? " Does it consider as "acceptable, safety and radiation protection, that the fuel nine (...) is loaded into the heart of the reactor in the state? The ASN did not wish to express themselves. "Taishan reactor's 1 fuel inspection and tank, launched from unloading, is still in progress. The origin of the unseanness of combustible pencils will only be determined at the end of these expertise, "has indicated EDF.

US warns it will not let Iran 'slow walk' nuclear talks .
The United States warned Saturday it would not allow Iran to "slow walk" international negotiations over its nuclear program while at the same time ramping up its atomic activities -- but stopped short of slamming the door on talks. "We can't accept a situation in which Iran accelerates its nuclear program and slow walks its nuclear diplomacy," said the official -- echoing a recent warning by Secretary of State Antony Blinken, and also reflecting concerns voiced by some of the Europeans taking part in the talks.

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