We are supposed to take their word for it that it's not active and that the plant is is safe.
Fukui Shinbun reports that KEPCO, Ooi Plant operator, cannot find photographs of the crushed zone that runs through the plant compound, between Reactor 2 and Reactor 3 buildings.
Two university researchers have said publicly that the crushed zone could be active faults or that it could be activated by the active faults nearby.
From Fukui Shinbun (6/26/2012):
KEPCO hasn't submitted the photos of faults at Ooi Nuke Plant despite the request from NISA
It has been pointed out by researchers that the crushed zone at the Ooi Nuclear Power Plant may cause the slippage of the ground surface when the active faults move. The plant is currently being prepared for the restart in Ooi-cho in Fukui Prefecture. The Nuclear and Industrial Safety Agency disclosed on June 25 that the photographs of the crushed zone that the agency had asked KEPCO to submit weren't submitted.
According to NISA, the request was not legally binding. KEPCO says "We're looking for the photographs but we can't find them." NISA says the request for the photographs is part of the information gathering, and the agency hasn't changed its opinion that the crushed zone at Ooi Nuke Plant is not active.
NISA disclosed this information during the meeting with citizens' groups held at the Office Building for the members of the House of Councilors (Upper House).
NISA started collecting information after Professor Mitsuhisa Watanabe of Toyo University (tectonic geomorphology) had pointed out the danger of the crushed zone shifting, earlier this month. The agency requested the original survey map that was attached to the application submitted by KEPCO to the national government in 1985 to build Reactors 3 and 4 at Ooi Nuclear Power Plant, and the photographs of the crushed zone. NISA said KEPCO only submitted the original survey map.
NISA also said it had unofficially asked the agency's 6 expert commissioners who were knowledgeable about active faults, and some of them were of the opinion that a field survey should be carried out.
I have a feeling that KEPCO is looking all over the place for the photographs, in all locations where they know for sure they don't keep.
The Ooi plant is set to restart on July 1.