Decommissioning Timeline

Key Milestones

June 7
2013
SCE announces it will permanently retire San Onofre Units 2 and 3.

June 12
2013
SCE notifies the NRC it has permanently ceased operation of Units 2 and 3.

July
2013
SCE transfers fuel from San Onofre Unit 2 reactor to the spent fuel pool, triggering a federal license change to an NRC possession license from an NRC operating license.



Dec 14
2014
SCE awards Independent Spent Fuel Storage Installation contract.
June 15
2015
NRC approves changes to San Onofre emergency planning requirements.

Oct
2015
California Coastal Commission approves Independent Spent Fuel Storage Installation expansion.
Dec
2016
SCE selects SONGS Decommissioning Solutions as decommissioning general contractor
Nov
2017
SCE completes expansion of dry cask storage facility
Jan
2018
SCE begins transferring spent nuclear fuel from wet to dry cask storage
Mar
2019
California State Lands Commission approves final Environmental Impact Report.

Oct
2019

California Coastal Commission unanimously approves Coastal Development Permit, clearing the way for dismantlement and decontamination to proceed.

Jan
2020

SCE issues Notice of Deconstruction to 12,000 residents living within a 5-mile radius of SONGS.


Mar
2020

California Department of Public Health - Radiologic Health Branch publishes data from the SONGS ISFSI radiation monitoring system for the first time.


July
2020

The Unit 1 reactor pressure vessel arrives at its disposal site in Utah. "From start to finish, the project was done with safety as the top priority," said Doug Bauder, SONGS chief nuclear officer.


July
2020

Southern California Edison’s two-year project to expand the Wheeler North Reef off the Orange County coast comes to a close. Initially started in 2008, the Wheeler North Reef was constructed as a mitigation measure related to the operation of SONGS to help increase the number of residential fish in the area.


July
2020

California Coastal Commission unanimously approves Inspection and Maintenance Program for the Holtec UMAX spent fuel storage system at SONGS.


Aug
2020

All spent nuclear fuel at San Onofre is placed in dry storage. The site switches to an "ISFSI-only" license that essentially means the nuclear focus is reduced to the spent fuel storage installation. The majority of San Onofre becomes an industrial deconstruction site, with critical functions, including oversight, focused on the safe dismantlement of plant structures.


October
2020

The first railcar laden with dismantlement debris leaves SONGS. The first shipment included roughly 82,000 lbs. of asbestos-containing material.


December
2020

Crews remove the Unit 3 generator rotor for shipment to the Fermi 2 nuclear plant in Michigan. The heavy lift is performed safely. This rotor joins its sister from Unit 2 at the Fermi plant.

March 15
2021

Southern California Edison distributed a three-volume set of plans supporting the offsite relocation of the spent nuclear fuel currently stored at the San Onofre Nuclear Generating Station. The strategies are outlined in the Action Plan, Strategic Plan and Conceptual Transportation Plan.

To further build momentum toward commercially reasonable offsite storage or disposal solutions, and to urge the federal government to meet its legal obligations, SCE and the counties of Orange and San Diego announced the formation of a stakeholder coalition, Action for Spent Fuel Solutions Now.


March
2021

Building demolition begins at SONGS. The K-60 warehouse, along with the K-40/50 building are the first to come down. In the months that follow, additional perimeter buildings would be dismantled, including the Unit 3 diesel generator building.


June 7
2021

The SONGS team is honored with a Top Innovative Practice award from the Nuclear Energy Institute for our spent nuclear fuel canister repair method using a metallic overlay.