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Sanmen Unit 1: Cold Hydro Test Complete

Successful completion of the cold hydrostatic test (CHT) at Sanmen Unit 1 occurred on May 25, 2016. The CHT confirms that the reactor systems meet design pressures under operating and accident conditions and signifies the completion of the plant’s design and construction programs. The test was completed within four hours with the unit’s reactor systems successfully maintaining a test pressure of 3,107 psig (pounds per square inch gauge) for 10 minutes without leakage. Inspection of the more than 1,800 required welds in the reactor coolant system test boundary found no leaks at that pressure.