Diablo Canyon NPP, near San Luis Obispo, California, should be shut down pending a safety review, says NRC senior federal nuclear expert Michael Peck in an internal report that was finally made public by Friends of the Earth August 25 .

The NRC  has allowed PG&E to continue operating the plant despite known safety questions.

At issue is the recently discovered Shoreline Fault. However, the other three faults, especially the Hosgri Fault, reportedly responsible for a devastating earthquake in Santa Barbara in the 1900’s, are also issues.

This is in addition to “normal” radioactive emissions from Diablo Canyon and other nuclear reactors that are a biological hazard to all life.

Here is a petition by Friends of the Earth to shut down Diablo Canyon:
http://action.foe.org/p/dia/action3/common/public/?action_KEY=16332

Last year, the Union of Concerned Scientists released a report on Diablo Canyon. They found the NRC was not holding Diablo Canyon to the same earthquake safety standards as other nuclear power plants.

“This is a dangerous double standard,” said David Lochbaum, director of UCS’s Nuclear Safety Project and author of the report. “At other facilities, the NRC enforced its safety regulations and protected Americans from earthquake threats. Today, in the case of Diablo Canyon, the NRC is ignoring its regulations, unfairly exposing millions of Americans to undue risk.”

When similar concerns surfaced at nuclear facilities in California, Maine, New York, Pennsylvania and Virginia, the NRC did not allow the plants to continue to operate until the agency determined they met safety regulations…In contrast, the NRC has allowed PG&E to continue to operate Diablo Canyon’s reactors despite this known threat.
http://www.ucsusa.org/news/press_release/diablo-canyon-report-0381.html
NRC Fails to Apply Standard Earthquake Protection Protocols to Diablo Canyon Nuclear Plant, Report Finds, November 13, 2013

Peck first raised his concerns in September 2010 when he filed non-concurrence papers and later elevated them to differing professional opinion, the highest level of official dissent within the agency. His report said that pipes and other important plant equipment at the plant may not be able to withstand the maximum shaking that could be generated by the Shoreline fault, which runs 2,000 feet offshore of the plant.

“We find it completely disgraceful that the NRC hid these concerns for all these years,” said Jane Swanson, spokeswoman for the antinuclear group San Luis Obispo Mothers for Peace.

Peck recommended that Diablo Canyon be shut down until it can be proved that the plant could withstand a quake along the Shoreline fault, a process that could require an amendment to the plant’s current operating license.
http://www.sanluisobispo.com/2014/08/25/3211883_report-diablo-canyon-closure-nrc.html?rh=1
Report calling for Diablo Canyon’s closure raises concerns locally, August 25, 2014

According to Peck’s filing, PG&E research in 2011 determined that any of three nearby faults – the Shoreline, Los Osos and San Luis Bay – is capable of producing significantly more ground motion during an earthquake than was accounted for in the design of important plant equipment. In the case of San Luis Bay, it is as much as 75 percent more.
http://www.ktvu.com/news/news/ap-exclusive-expert-calls-diablo-canyon-shutdown/ng8Tj/
AP Exclusive: Expert calls for Diablo Canyon shutdown, Aug. 25, 2014

On August 26, Friends of the Earth filed a formal petition with the NRC:

Friends of the Earth — an advocacy group critical of the nuclear power industry — filed a petition with the Nuclear Regulatory Commission asking for a hearing and charging the Diablo Canyon plant is violating its operating license.

… The group argues the reactors located between Los Angeles and San Francisco should remain closed until a rigorous safety review is completed and PG&E amends its federal license.
http://www.sanluisobispo.com/2014/08/26/3213001/group-files-petition-to-idle-california.html#storylink=relast
Group files petition to idle Diablo Canyon nuclear plant, August 26,, 2014

To make a comment to the NRC, here is an editable letter you can send, courtesy of Friends of the Earth. My comment was to shut down Diablo Canyon permanently:

http://action.foe.org/p/dia/action3/common/public/?action_KEY=16332

Sources:

http://www.ktvu.com/news/news/ap-exclusive-expert-calls-diablo-canyon-shutdown/ng8Tj/
AP Exclusive: Expert calls for Diablo Canyon shutdown, Aug. 25, 2014

http://www.sanluisobispo.com/2014/08/25/3211883_report-diablo-canyon-closure-nrc.html?rh=1
Report calling for Diablo Canyon’s closure raises concerns locally, August 25, 2014

http://www.sanluisobispo.com/2014/08/26/3213001/group-files-petition-to-idle-california.html#storylink=relast
Group files petition to idle Diablo Canyon nuclear plant, August 26,, 2014

http://www.ucsusa.org/news/press_release/diablo-canyon-report-0381.html
NRC Fails to Apply Standard Earthquake Protection Protocols to Diablo Canyon Nuclear Plant, Report Finds, November 13, 2013