SAN ONOFRE (CNS) - The California Coastal Commission voted 10-0 in a special meeting Thursday to approve an inspection and maintenance program allowing Southern California Edison to store spent nuclear fuel in a storage site at the San Onofre Nuclear Generating Station.
The program outlines actions SCE will take to inspect the canisters that contain spent nuclear fuel, as well as how potential issues with the canisters will be remedied.
Robotic devices will be used to inspect the canisters and site conditions will be simulated on a test canister, which will be observed for potential degradation. Two spent fuel storage canisters will be inspected every five years starting in 2024, and the test canister will be inspected every two to three years.
Canister flaws will be repaired by applying a nickel-based metallic spray, and the presence of flaws may result in increased canister inspection frequency and an increase in the number of canisters inspected.
The inspection and maintenance program was also reviewed by the engineering consulting firm LPI, which provided recommendations that included the increase in canister inspections should flaws arise.
Nearly 3.6 million pounds of spent nuclear fuel are stored at the plant, which stopped producing electricity in 2012.
Concerns remain over the plant's proximity to the ocean and the potential for the site to be affected by rising sea levels, tsunami inundation, seismic hazards.
By 2035, the commission may look to relocate the canisters to another site, although no such location is available, according to a commission report.
The report states that though the commission "has consistently voiced its concern that there is no permanent or long-term repository for spent nuclear fuel from SONGS or the other nuclear power plants along the California coast," no such repository has been identified by the federal government, necessitating storage on-site at SONGS and many other nuclear power plants across the country.
The inspection and maintenance program is designed to ensure the canisters "will remain in a physical condition sufficient to allow both on- site transfer and off-site transport," should such a site become available.