paloverde


Nuclear Regulatory Commission: Contradictory Decisions Undermine Nuclear Safety

, director, Nuclear Safety Project

As described in a recent All Things Nuclear commentary, one of the two emergency diesel generators (EDGs) for the Unit 3 reactor at the Palo Verde Nuclear Generation Station in Arizona was severely damaged during a test run on December 15, 2016. The operating license issued by the Nuclear Regulatory Commission (NRC) allowed the reactor to continue running for up to 10 days with one EDG out of service. Because the extensive damage required far longer than the 10 days provided in the operating license to repair, the owner asked the NRC for permission to continue operating Unit 3 for up to 62 days with only one EDG available. The NRC approved that request on January 4, 2017.

The NRC’s approval contradicted four other agency decisions on virtually the same issue. Read more >

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Nuclear Leaks: The Back Story the NRC Doesn’t Want You to Know about Palo Verde

, director, Nuclear Safety Project

As described in a recent All Things Nuclear commentary, one of two emergency diesel generators (EDGs) for the Unit 3 reactor at the Palo Verde Nuclear Generation Station in Arizona was severely damaged during a test run on December 15, 2016. The operating license issued by the Nuclear Regulatory Commission (NRC) allowed the reactor to continue running for up to 10 days with one EDG out of service. Because the extensive damage required far longer than 10 days to repair, the owner asked the NRC for permission to continue operating Unit 3 for up to 62 days with only one EDG available. The NRC approved that request. Read more >

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Palo Verde: Running Without a Backup Power Supply

, director, Nuclear Safety Project

The Arizona Public Service Company’s Palo Verde Generating Station about 60 miles west of Phoenix has three Combustion Engineering pressurized water reactors that began operating in the mid 1980s. In the early morning hours of Thursday, December 15, 2016, workers started one of two emergency diesel generators (EDGs) on the Unit 3 reactor for a routine test. The EDGs are the third tier of electrical power to emergency equipment for Unit 3. Read more >

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TVA’s Nuclear Allegators

, director, Nuclear Safety Project

The Nuclear Regulatory Commission (NRC) receives reports about potential safety problems from plant workers, the public, members of the news media, and elected officials. The NRC calls these potential safety problems allegations, making the sources allegators. In the five years between 2012 and 2016, the NRC received 450 to 600 allegations each year. The majority of the allegations involve the nuclear power reactors licensed by the NRC. Read more >

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Visit to the Palo Verde Nuclear Generating Station

, director, Nuclear Safety Project

Last fall, I read something about the Department of Energy (DOE) partnering with the Palo Verde Nuclear Generating Station (PVNGS) on a digital instrumentation upgrade project. The topic interested me for two reasons. Read more >

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