San Onofre 1
DECONSouthern California Edison·San Clemente, CA·PWR·436 MWe
Reactor Data
Reactor Units
Every power reactor at this site as listed in the IAEA Power Reactor Information System (PRIS): reactor type and model, net electrical capacity, grid connection and commercial operation dates, and current status.
1 unit: 1 permanent shutdown.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| San Onofre 1 | PWR | PWR | 436 | 1964-05-01 | 1967-07-16 | 1968-01-01 | 1992-11-30 | Permanent Shutdown |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| San Onofre 1 | 436 | 456 | 1,347 | 1967-06-14 | WESTINGHOUSE ELECTRIC CORPORATION | WESTINGHOUSE ELECTRIC CORPORATION |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| San Onofre 1 | 51.1 TWh | 53.2% | 59.8% | 55.1% |
Operator: SOUTHERN CALIFORNIA EDISON Co.
Owner: SOUTHERN CALIFORNIA EDISON Co.
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-26.
Working Here
Jobs in CA 17 active
Active nuclear industry job listings in CA from the NukeWorker job board. Click a job title for full details, or click the header to search all jobs in this state.
Per Diem Rates FY 2027
Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from GSA for FY 2027.
$199
Lodging/Night
$86
M&IE/Day
$285
Total/Day
Los Angeles, Los Angeles / Orange / Ventura / Edwards AFB less the city of Santa Monica County, CA
Unemployment Benefits CA
Maximum state unemployment insurance benefits for CA. Actual benefits depend on your earnings history and may be lower than the maximum. Data as of Jan 2026.
$450
Max Weekly
26
Max Weeks
$11,700
Max Total
7-day waiting period before benefits begin
Photos
Photos of this facility from the NukeWorker photo gallery. Click the header or any photo to browse the full album.
!["The Arch" Tijuana Mexico](https://www.nukeworker.com/pictures/albums/userpics/33308/thumb_mex1[1].jpg ""The Arch" Tijuana Mexico
2307 views")
Facility Map
Interactive satellite map showing the facility's geographic location. Marker color indicates current status: green for online, red for offline, orange for reduced power. Click the header to open in Google Maps satellite view.
33.3691, -117.555
Location & Contact
Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
Phone:
(714) 302-1212
Website:
http://www.sce.com
NukeWorker Member Ratings 92 votes
Community ratings from NukeWorker members. Vote to share your experience working at this facility. Score uses a Bayesian average that accounts for vote count — facilities with few votes are pulled toward the fleet average, so rankings reflect confidence, not just raw percentages.
Above Average
27 (29%)
Average
31 (33%)
Below Average
34 (36%)
Plant Facts
About This Site
Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: San Onofre Nuclear Generating Station.
San Onofre Nuclear Generating Station stands on the Pacific coast in San Diego County, California, just south of San Clemente, on land within Marine Corps Base Camp Pendleton.
Read more
Unit 1, a Westinghouse pressurized water reactor, began construction in August 1964, entered commercial operation on January 1, 1968, and was shut down on November 30, 1992. Units 2 and 3 are Combustion Engineering two-loop pressurized water reactors that entered commercial operation on August 8, 1983, and April 1, 1984. In January 2012 both units went offline after premature wear was found in replacement steam generators installed in 2010 and 2011, and Unit 3 had a radioactive leak on January 31, 2012. Southern California Edison announced the permanent retirement of Units 2 and 3 in June 2013.
Ownership & Construction
The utility or company that owns and operates the facility, the architect-engineer responsible for plant design, and the primary construction contractor. Click names to view all facilities by that entity on the map.
Owner/Operator:
Southern California Edison
EIX
Edison International
NYSE
$57.62
▲ +0.27 (+0.47%)
Previous Close
57.35
Day's Range
57.06 – 58.00
52-Week Range
51.10 – 81.62
Volume
1,750,016
Delayed quote as of Oct 26, 2026 3:51 PM ET.
Source: Yahoo Finance.
Full quote on Yahoo Finance
Technical Specs
Reactor design specifications including type (PWR/BWR), containment design, nuclear steam supply system manufacturer, thermal and electrical power ratings, and current operational status.
Licensing
NRC licensing history including docket number, license type and number, construction permit date, operating license issuance, commercial operation date, license renewal, and expiration date.
Const. Permit:
1964-05-01
Operating Lic:
1967-07-16
Commercial Op:
1968-01-01