Plant Safety


spooky Diablo view

The Nuclear Regulatory Commission (NRC) does not live up to its charge by Congress to provide for the protection of the public and the environment.  The NRC places a higher priority on protecting corporate profits.

2018 - 12 - 28 Embrittlement letter to Gavin Newsom

Unit 1 reactor vessel at Diablo Canyon has been identified as one of the five most embrittled reactor vessels in the U.S. This raises serious environmental concerns as well as grid reliability and safety issues.

2018 - 12 - 09 MFP Comments on Diablo Canyon Decommissioning Engagement Panel Draft Report

San Luis Obispo Mothers for Peace submitted the following comments on Public Review Draft of the Strategic Vision of the Diablo Canyon as written by the Decommissioning Engagement Panel (DCDEP), dated November 2018. The DCDEP consists of eleven volunteer citizens and all of their workshops and meetings are open to the public. For more information about the schedule and work of the DCDEP go to


There are proposals before the Nuclear Regulatory Commission (NRC) to construct an interim storage facility for our country’s high-level radioactive waste. This would involve transporting up to 173,000 metric tons of toxic material on our roads, rails, and waterways through our cities – and then storing them in a centralized location until a permanent solution can be found. On September 14, 2018, a coalition of seven environmental organizations filed a legal challenge with the NRC opposing the plans of Holtec International/Eddy-Lea Energy Alliance (ELEA) to construct and operate a centralized interim storage facility (CISF) for high-level radioactive waste in southeastern New Mexico. Holtec intends to store up to 173,000 metric tons of radioactive wastes, more than twice the amount that currently exists.

2018 - 04 - 18 Position on Consolidated Interim Storage

Over 75,000 metric tons of radioactive wastes have piled up at nuclear power plants across the United States. After more than 75 years of making this lethal waste, there are still no viable solutions to the problem of how to protect the environment from the dangers it will pose for a million years. If implemented, Consolidated (or Centralized) “Interim” Storage (CIS) facilities would be sites to which irradiated high-level nuclear waste would be moved and stored temporarily. Then, at some point, it would be shipped to a currently non-existent permanent repository. These facilities would provide temporary storage of commercial irradiated waste, mostly in dry storage casks, from all over the country. Currently there are two proposed facilities, one in Texas and the other in New Mexico.

2017 - 09-14 Mothers for Peace asks CPUC for Diablo Shut Down in 2019/2020

Statement of Mothers for Peace at the Public Utilities Commission meeting in San Luis Obispo on September 14, 2017: San Luis Obispo Mothers for Peace (MFP) applauds PG&E for its decision to close the Diablo Canyon nuclear plant. However, our organization asserts that it would be in the best interests of the ratepayers and the citizens of California if the shut-down date were moved forward to 2019/2020, rather than the 2024/2025 dates proposed by PG&E.


San Luis Obispo Mothers for Peace is a party to the California Public Utilities Commission proceeding A1608006, in which Pacific Gas and Electric Company has filed its Joint Proposal to shut down Diablo in 2025 when both operating licenses will expire. Mothers for Peace contends that the plant should close in 2019, thereby avoiding problems related to safety, reliability and costs.

2016 - 07 - 05 Mothers for Peace Will Continue to Advocate for Safety

On June 21, 2016, Pacific Gas and Electric Company (PG&E) announced a Proposal to shut down Diablo Canyon nuclear plant at the end of its current licensing period and to bring renewables on-line. There were a number of organizations that joined with PG&E to work out this plan: International Brotherhood of Electrical Workers Local 1245, Coalition of California UtilityEmployees, Friends of the Earth, Natural Resources Defense Council, Environment California, and Alliance for Nuclear Responsibility

2015 - 08 - 29

Scoping Comments on NRC Environmental Impact Study required for PG&E license renewal application for Diablo Canyon nuclear plant.

2015 - 07 - 31 MFP Comments on Scoping for EIS

These Comments on Environmental Issues for Diablo Canyon Nuclear Plant License Renewal are submitted San Luis Obispo Mothers for Peace. The Comments offer sufficient information to justify inclusion of the issues raised in the scoping of the Environmental Impact Statement (EIS) to be developed by the NRC.


The Nuclear Regulatory Commission (NRC) is developing an environmental impact statement (EIS) for the proposed license renewal of the Diablo Canyon Nuclear Power Plant and is seeking public comment on issues to be covered by the report. Supporters of MFP are encouraged to consider speaking on any of the topics below - or other matters that concern you.

2014-10-29 Mothers for Peace joins other environmental groups and NRDC in lawsuits challening NRC failure to comply with 2012 court ruling on nuclear waste storage

Nine environmental groups and the Natural Resources Defense Council (NRDC) filed separate lawsuits today in the D.C. Court of Appeals challenging the U.S. Nuclear Regulatory Commission (NRC) decision to proceed with an “extended waste storage rule” and a generic environmental impact statement that fail to comply with a 2012 federal court ruling that had previously reversed the NRC.

2014 - 06 - 18 Mothers for Peace demands resignation of Commissioner Magwood

34 GROUPS, INCLUDING SAN LUIS OBISPO MOTHERS FOR PEACE, URGE NUCLEAR REGULATORY COMMISSION’S “FATALLY COMPROMISED” WILLIAM MAGWOOD TO RESIGN IMMEDIATELY Failed to Recuse Himself on Key Votes: Pursuit of Job Promoting Nuclear Power Put NRC Commissioner at Odds with “Safety First” Requirement of U.S. Federal Law; Parallel Seen to OIG Investigation Into Job-Seeking Misconduct of Ex-Commissioner Merrifield.