China denies radiation leaks in nuclear reactors and admits damage to fuel rods

Shanghai — Chinese government said Wednesday that “about 5” of internal uranium fuel rods Nuclear power plant He added that although it had been damaged in southeastern China, no radiation was leaking from the reactor at the site.

China’s Nuclear Safety Agency said in a statement that regulators also considered and approved limits on the amount of radioactive gas that could accumulate in reactor water. In an interview earlier this week, US and European nuclear scientists said that the accumulation of radioactive gas in the water and steam surrounding fuel rods is not uncommon in other reactors, but is poorly designed, manufactured and controlled. He said that it often indicates that there is.

The Taishan Nuclear Power Plant is located on the southeastern coast of China, about 80 miles southwest of Hong Kong. Reactor 1 of a power plant, which has recently faced difficulties, has more than 60,000 fuel rods.

According to safety agencies, the reactor is designed to operate safely if up to 0.25 percent of the fuel rods are damaged. It will be at least 150 fuel rods.

Najmedin Meshkati, an engineering professor specializing in nuclear safety at the University of Southern California, said it is fairly common for some fuel rods to be damaged in a nuclear reactor. However, it is less common for radioactive gas to accumulate in water and steam around fuel rods, and regulators need to consider what level is safe, he said.

“There is no doubt that something has happened,” he said, adding that events inside the reactor are unlikely to pose a serious safety threat.

Oyama’s two reactors use a new design developed in France. Framatome and EDF, two major French companies involved in the construction and operation of the reactor, publicly acknowledged on Monday that there was a problem with the operation of reactor 1 on site.

The fuel rods of western reactors also occasionally leak trace amounts of radioactive gas into the surrounding water and steam. Leaks can occur if the outer coating of the rod is damaged by bristles from brushes and other contaminants used during maintenance.

However, China’s safety regulator, which is part of the Ministry of Ecology and Environment, said no leaks to the environment have occurred. “Currently, the results of monitoring the radiation environment around the Taishan Nuclear Power Plant show that there are no abnormalities in the radiation levels around the Taishan Nuclear Power Plant,” the statement said.

According to safety agencies, the fuel rods are leaking a little into the surrounding water and steam, but the water system itself is not. And even if the water system leaks, the entire reactor is in an unbroken, very thick concrete dome, officials added.

Liu Yi Contributed to the research.

China denies radiation leaks in nuclear reactors and admits damage to fuel rods

Source link China denies radiation leaks in nuclear reactors and admits damage to fuel rods

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