California nuclear plant

California nuclear plant

TOKYO, Japan - A March 2011 file photo shows the San Onofre Nuclear Generating Station in southern California in the United States. Electric utility Southern California Edison announced on June 7, 2013, that two reactors at the plant taken offline in early 2012 due to faulty steam generators made by a Japanese manufacturer will be shut down for good.

San Onofre nuclear power plant

San Onofre nuclear power plant

TOKYO, Japan - File photo taken in March 2011 shows San Onofre nuclear power plant in California. Mitsubishi Heavy Industries Ltd. and a local utility in California were aware of a design flaw in Mitsubishi-made steam generators for a reactor at the plant before a radiation leak in January 2012, according to a document released by the U.S. nuclear regulator.

San Onofre nuclear power plant

San Onofre nuclear power plant

TOKYO, Japan - File photo taken in March 2011 shows the San Onofre nuclear power plant in southern California. The number of incidents of abnormal attrition -- or wearing away or grinding down by friction -- found in Japanese-made steam generator tubes in two reactors at the power plant has reached around 15,000, the U.S. Nuclear Regulatory Commission said in a report on July 12, 2012.

Antinuclear protest in U.S.

Antinuclear protest in U.S.

LOS ANGELES, United States - Sendai residents Hirohide Sakuma (L) and Kyoko Sugasawa (C) address the crowd at an antinuclear protest near the San Onofre Nuclear Generating Station (back) on the California coast on March 11, 2012, the first anniversary of the massive earthquake and tsunami in Japan that triggered the crisis at the Fukushima Daiichi nuclear power plant. Residents near the two-reactor San Onofre plant say its location puts it in danger of earthquakes and possible tsunamis.

Antinuclear protest in U.S.

Antinuclear protest in U.S.

LOS ANGELES, United States - Sendai residents Hirohide Sakuma (L) and Kyoko Sugasawa (C) address the crowd at an antinuclear protest near the San Onofre Nuclear Generating Station (back) on the California coast on March 11, 2012, the first anniversary of the massive earthquake and tsunami in Japan that triggered the crisis at the Fukushima Daiichi nuclear power plant. Residents near the two-reactor San Onofre plant say its location puts it in danger of earthquakes and possible tsunamis. (Kyodo)