A large Southern California nuclear plant is out of commission indefinitely, and will remain so until there is an understanding of what caused problems at two of its generators and an effective plan to address the issues, the nation's top nuclear regulator said Friday. Gregory Jaczko, chairman of the U.S. Nuclear Regulatory Commission, refused to give a timetable as to when the San Onofre nuclear plant could resume operation. He said only that his agency had "set some firm conditions" as to when that could happen.
Unit 4 is leaning and could topple if hit with another earthquake or tsunami, resulting in a deadly high-level radioactive waste fire. The ability for the unit to withstand another seismic event is rated at zero.
“If the cooling water supply is lost to the high-level radioactive waste storage pool in Unit 4, it could be just a matter of hours before the irradiated nuclear fuel is on fire,” warned Kevin Kamps, radioactive waste specialist at Beyond Nuclear. “A fire in the Unit 4 high-level radioactive waste storage pool could release up to eight times more hazardous cesium-137 than the Chernobyl reactor explosion. That in turn would mean the site would have to be evacuated, risking the potential for all seven high-level radioactive waste storage pools at the site to ignite. If that happened, Fukushima Daiichi would release 85 times the levels of cesium released by Chernobyl, potentially forcing an evacuation, and permanent condemnation, of hundreds to thousands of square miles
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