So, as far as Kansai Electric Power Company and the Nuclear Regulatory Authority are concerned, an accident at Ooi Nuclear Power Plant that could involve station blackout, multiple core melt, severe damages to reactor buildings and turbine buildings not to mention damaged water intake for the secondary cooling systems can be dealt with as long as KEPCO keeps a room next to the central control room available which will serve as the emergency response headquarters.
Also recall that the main access route to Ooi Nuke Plant, the only nuclear power plant in operation in Japan right now, is via the tunnel under the mountains. When KEPCO forced the restart, the company sent employees on a boat to avoid the protesters on land. Good luck with that after an earthquake and tsunami.
From Jiji Tsushin (6/11/2013):
No objection on alternative emergency response HQ at an NRA meeting to confirm whether Ooi Nuke Plant meets the new safety standards
Nuclear Regulatory Authority held a meeting on June 11 to confirm whether Reactors 3 and 4 at Ooi Nuclear Power Plant by KEPCO (Ooi-cho, Fukui Prefecture), the only operating nuclear power plant in Japan, meet the new regulatory standards. The focus was on the emergency response headquarters in a major accident that would involve meltdown (core melt). KEPCO explained that a room located next to the central control room for Reactors 1 and 2 at Ooi Nuke Plant would serve as the alternative emergency response headquarters, and there was no major objection [from NRA].
NRA also decided to conduct a survey of the plant on June 15, and it will decide whether the plant should continue to operate by the end of this month. If there is no significant safety problem, NRA is going to approve continued operation until the scheduled maintenance in September.
Reactors 1 and 2 at Ooi Nuclear Power Plant have been in the scheduled maintenance.
TEPCO had the multi-story Anti-Seismic Building at Fukushima I Nuke Plant that was completed just in time, and it has been used as the emergency response headquarters. KEPCO says a room next to the control room will be sufficient, and no one at NRA thinks it is not.
The NRA doesn't seem to have any problem with KEPCO's estimate either that in case of an earthquake caused by a 90-kilometer-long active fault in Wakasa Bay a 3-meter-high tsunami (max) will hit the water intake at the plant, which is located at 9.7 meters above the sea level.
Where have we seen the similar numbers before? And what has happened to the nuclear plant?
Dismissing its own internal estimates (10 to 15 meters), TEPCO settled for the max 5.7-meter tsunami in case of a large earthquake of Magnitude 7.9. It was 15-meter tsunami/run-up, and M.9.0 earthquake.
From Jiji Tsushin (6/10/2013):
Study of earthquake, tsunami almost complete, in evaluation of Ooi Nuke Plant on the new regulatory standards, says NRA
Nuclear Regulatory Authority held a meeting on June 10 to evaluate whether Reactors 3 and 4 at Ooi Nuclear Power Plant meets the new regulatory standards. The plant, operated by KEPCO, is the only nuclear power plant operating in Japan. NRA will continue to confirm the safety measures at the plant, and will decide whether the plant should continue to operate by the end of this month.
In the June 10 meeting, KEPCO showed the data that says a tsunami with the maximum height of 3 meters would reach the water intake for Reactors 3 and 4 if they assume the 90-kilometer-long fault moves in Wakasa Bay, where Ooi Nuke Plant is located, and submarine landslide occurs. The site elevation at Reactors 3 and 4 is 9.7 meters from the sea level, but NRA will ask for evaluation of the effect on the facilities if the tsunami water flows in from the water intake.
Uh... How about some evaluation if the tsunami water is much, much higher than the operator anticipates, like it happened in Fukushima two years ago?
It looks more and more like NRA is another NISA after all, agency to enable electric power companies to operate nuclear power plants with minimum oversight.
In other words, Japan has fully recovered from the biggest nuclear accident in the nation's history.