Yonggwang unit 4 was operated at the rated power. At full power operation, maintenance crew had to open 2A breaker to check the function of the inverter 02NN but he opened other breaker, 3/A, which is connected to power supply of main feedwater pump no.2 etc. by confusion. As a result of this wrong action of worker, main feed water pump was tripped by power supply line failure due to 3A breaker open. Reactor power cut-back signal was initiated but actuation relay was de-energized because the power supply of this relay is connected to 3A breaker. At 11:20, May 1996 reactor trip occurred by main feed water pump stop which resulted in S/G low level signal. There was no release of radioactive materials outside the reactor building and no unplanned exposure to employees. Justification: As full safety functions were available, the event is rated at level "0" as per User's Manual, Part III, Table III, A1
Everywhere you look, the nuclear industry’s hype machine is in overdrive. Goldman Sachs, Microsoft, and the UK government all tout small modular reactors as the silver bullet for climate change and energy security. Tech billionaires are hiring nuclear veterans. Wall Street is whispering about “round-the-clock power” for artificial intelligence data centers. For those old enough […]
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Big batteries and EVs to the rescue again as faults with new nuclear plant cause chaos on Nordic grids The Finnish nuclear power plant Olkiluoto was finally connected to the grid last year, at an estimated cost of €11 billion compared to the original budget of €3 billion. That cost blowout forced its developer, the […]
A vast subsea nuclear graveyard planned to hold Britain’s burgeoning piles of radioactive waste is set to become the biggest, longest-lasting and most expensive infrastructure project ever undertaken in the UK. The project [UK's nuclear waste dump] is now predicted to take more than 150yrs to complete with lifetime costs of £66bn in today’s money...The […]
Last year, the Dutch Province of Limburg started an alliance in which, besides the local government, research institutes, small nuclear reactor (SMR) developers, utilities, industrial customers and funders cooperated. With this "Limburg SMR alliance" Limburg tried to lead the way towards an SMR in Limburg. The preferred site for a first SMR would be Chemelot, […]
