Nuclear Power Plants in the USA - Arizona & California
Bodega Head
Location: CA
Operator: Pacific Gas and Electric Co
Configuration: 1 X 325 MW BWR
Operation: n/a
Reactor supplier: GE
T/G supplier: ??
EPC: PG&E
Quick facts: This photo shows the 142ft wide excavation made for a NPP sited at Horshoe Cove on Bodega Bay north of San Francisco. This was to be the world's largest BWR and a follow-on to the 50-MW pilot BWR at Humboldt Bay. After its announcement in 1957, the project was the object of considerable and increasingly organized opposition, and on 30 Oct 1964, PG&E announced that the project was cancelled. The excavation was known as the "Hole in the Head". It wsa allowed to fill with water and remains a local landmark.

Photograph courtesy of www.sonomamag.com
Posted 26 Dec 2015

Diablo Canyon
Location: CA
Operator: Pacific Gas and Electric Co
Configuration: 2 X 1,197 MW PWR
Operation: 1985-1986
Reactor supplier: WH
T/G supplier: WH
EPC: PG&E
Quick facts: Diablo Canyon is on an isolated 750ac site on the central California coast The two units were under construction for almost 20yrs and cost about $5.8bn. They supply about 20% of PG&E's electricity and are the most important baseload units on the Northern California grid.

Photograph courtesy of Pacific Gas and Electric Co
Posted 18 Feb 2011

Humboldt Bay
Location: CA
Operator: Pacific Gas and Electric Co
Configuration: 2 X 51 MW conventional steam, 1 X 75 MW BWR, 2 X 15 MW gas turbines
Operation: 1956-1976
Reactor supplier: GE
Boiler supplier: B&W, Riley
T/G supplier: GE, WH
EPC: PG&E
Quick facts: This photo shows Units 1-3 at upper left and two GTs and foundation work on a new gas-engine power station lower center. Unit-3 came online in 1963 and  was shut down in 1976 for refueling, seismic upgrades, and repairs. As there had been significant changes to nuclear safety standards, the decision was made that further modifications were not economical, and that Unit-3 was not restarted. In 1986, PG&E requested an NRC license amendment for SAFSTOR, a condition which would permit Unit-3 to store nuclear fuel, but not operate and this was received in 1988. In Oct 2009, nuclear unit disassembly got underway and, in Jul 2010, the new gas engines went online and Units 1&2 were closed.

Photograph courtesy of Pacific Gas and Electric Co
Posted 19 Mar 2011

Palo Verde
Location: AZ
Operator: Arizona Public Service Co
Configuration: 3 X 1,428 MW PWR
Operation: 1986-1988
Reactor supplier: CE
T/G supplier: GE
EPC: Bechtel
Quick Facts: Palo Verde NGS is the largest nuclear power plant in the USA. Lead owner and operator Arizona Public Service has a 29.1% stake in the plant. Other owners are Salt River Project (17.5%), El Paso Electric (15.8%), Southern California Edison (15.8%), PNM Resources (10.2%), Southern California Public Power Authority (5.9%), and Los Angeles Dept of Water & Power (5.7%). 2015 generation was 32.5 TWh, an all-time record. Over the last decade, the plant has installed new steam generators, turbine rotors, reactor vessel heads, and rapid refueling systems. Palo Verde was originally to have two additional units. By 2015, total plant generation reached 780 TWh.

Photograph courtesy of Arizona Public Service Co
Re-posted 25 Feb 2015

Rancho Seco
Location: CA
Operator: Sacramento Municipal Utility Dist
Configuration: 1 X 963 MW PWR
Operation: 1975 (ret 1989)
Reactor supplier: B&W
T/G supplier: WH
EPC: Bechtel
Quick facts: Rancho Seco was closed after a public referendum. In Oct 2009, the NRC released 80ac of the site for unrestricted public use. Approximately 11ac of land including a storage building with low-level radwaste and a dry-cask spent fuel storage area remain under NRC license.

Photograph courtesy of Power
Posted 26 May 2007

San Onofre Unit-1
Location: CA
Operator: Southern California Edison Co
Configuration: 1 X 456-MW PWR
Operation: 1968 (ret 1992)
Reactor supplier: WH
T/G supplier: WH
EPC: Bechtel
Quick Facts: SONGS-1 was a 3-loop reactor rated at 1347 MWt. It began commercial operation on 1 Jan 1968 and was stopped on 30 Nov 1992. Defuelling was completed on 6 Mar 1993. Decommissioning began in 1999 and the majority of the plant's structures and facilities were decontaminated, dismantled and removed from the site by 2008 at a cost of about $460mn. The containment sphere for SONGS Unit-1 is shown under construction in this image dating to 1966.

Photograph copyright by and courtesy of Smithsonian Institution
Posted 30 Dec 2011

 
San Onofre 2&3
Location: CA
Operator: Southern California Edison Co
Configuration: 2 X 1,200 MW PWR
Operation: 1983-1984 (ret)
Reactor supplier: CE
T/G supplier: GEC
EPC: Bechtel
Quick Facts: The T/G sets for Units 2&3 are the only GEC machines in the USA and the largest the company ever built. Alstom supplied replacement welded LP rotors at SONGS in 1999. In Feb 2010, a 2yr, $671mn project to replace all four 640t steam generators was completed. These were ordered from Mitsubishi Heavy Industries in Sep 2004. On 9 Jan 2012, Unit-2 was taken ofline for a routine outage. On 31 Jan 2012, Unit-3 was taken offline after a small SG tube leak was detected. This reportedly turned out to result from a SG design flaw and/or other mechanical issue. After months of analysis and communication with the NRC nd other authorities, SCE announed on 7 Jun 2013 that the units would not restart and that they would be permanntly retired.

Photograph courtesy of Power
Posted 18 Jun 2004

Vallecitos
Location: CA
Operator: Pacific Gas and Electric Co
Configuration: 1 X 5 MW BWR
Operation: 1957 (ret 1963)
Reactor supplier: GE
T/G supplier: GE
EPC: GE, Bechtel
Quick facts: Vallecitos was the first privately-owned and operated nuclear power plant to deliver significant quantities of electricity to the grid supplying, about 40 GWh from Oct 1957 to Dec 1963. It was used by GE as a pilot plant and test bed for fuel, core components, controls, and staff training for the Dresden power station built in Illinois 5yrs later. The 1,600ac site in Alameda Co is still in use by GE Hitachi Nuclear Energy for nuclear R&D.

Photograph by Don Sleeter (wikimedia)
Posted 5 Dec 2009

 

Abbreviations

Data: industcards, Platts UDI World Electric Power Plants Data Base

Updated 09-Mar-2016

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