- Japan’s Nuclear Regulation Authority last week began examining a fissure beneath Japan Atomic Power Co.’s Tsuruga nuclear energy facility in Fukui prefecture to determine whether it is associated with a nearby active fault. NRA officials investigated samples of rock strata extracted in a field survey. If the agency decides that the plant is located above an active fault, the facility’s two reactors are unlikely to be allowed to resume operation. The agency is expected to finalize its assessment after a Dec. 10 meeting. Several other reactors are slated for similar investigations. A separate team last month failed to reach a definitive conclusion about Kansai Electric Power Co.’s Ohi site, where Japan’s only two operating reactors are located.