During annual plant inspection which had been started in April of this year, the reactor was automatically shutdown due to signal "SG water level abnormally low". This event occurred during preparation of power generation following the reactor restart. As a result of investigation, it was found that the wiring, which had been temporarily disconnected from the relay terminals during the functional test of the main feed water pump (secondary system), was inadvertently touched to adjacent terminals during restoring work and caused short circuiting. Due to the short circuiting, the no fuse breaker (NFB) for relay circuit was opened. Tripping the motor driven main feedwater pump. This caused the lowering of the steam generator water level, which led to automatic reactor shutdown. There were no releases of radioactive materials outside the reactor facility, and also there were no unplanned exposures of employees under radiation. BASIS FOR RATING: The initiating event is a loss of feedwater flow in PWR seconday system or a reactor automatic trip, each of which is an "expected" event. All safety systems are available ("full"). A level 0 or a level 1 can be selected due to Table 1. A-1R. Operational limits and conditions were not exceeded, and reactor trip sequence proceeded normally, which selects a level 0 due to "5" below scale. There was a single human error which caused the trip of a motor driven main feedwater pump, but it did not reveal deficiency in safety culture. This also supports to select a level 0 instead of a level 1 due to "5 (below scale). Thus, level 0 is selected. DIFFICULTIES IN RATING:
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Anke Herold, Executive Director Oeko-Institut, Freiburg (Germany), in Brussels about the claim to triple nuclear by 2050: IPCC scenarios vs forecast development of nuclear.
Yesterday, the ANVS, the Dutch nuclear supervisor, authorized the transport of up to six shipments of fissile enriched uranium from Russia to Urenco in Almelo. This is remarkable because after the Russian invasion, almost two years ago, the uranium-enriching state-owned company in Almelo claimed to be "very concerned" about developments in Ukraine and therefore "stopped […]
[The Guardian]: "As nuclear plant is hit by further delay, real cost will be far higher after inflation is included, as project uses 2015 prices. The owner of Hinkley Point C has blamed inflation, Covid and Brexit as it announced the nuclear power plant project could be delayed by a further four years, and cost […]
From WNN: In 2022, 13 EU countries with nuclear electricity production generated 609,255 GWh of nuclear electricity - down 16.7% compared with 2021, according to figures released by Eurostat, the statistical office of the European Union. It noted this is the lowest level registered in the period from 1990, the first year for which comparable […]