St. Laurent

Technical specifications, photos, nearby jobs, and satellite map for St. Laurent.

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Reactor Data

Reactor Units

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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.
4 units: 2 operational, 2 permanent shutdown. Net capacity in service: 1,830 MWe.
Unit Type Model Net MWe Construction Grid Commercial Op Shutdown Status
St. Laurent A-1 GCR UNGG 390 1963-10-01 1969-03-14 1969-06-01 1990-04-18 Permanent Shutdown
St. Laurent A-2 GCR UNGG 465 1966-01-01 1971-08-09 1971-11-01 1992-05-27 Permanent Shutdown
St. Laurent B-1 PWR CP2 915 1976-05-01 1981-01-21 1983-08-01 Operational
St. Laurent B-2 PWR CP2 915 1976-07-01 1981-06-01 1983-08-01 Operational
Capacity, milestones and suppliers
Unit Design MWe Gross MWe Thermal MWt First Criticality Reactor Supplier Turbine Supplier Notes
St. Laurent A-1 480 500 1,650 1969-01-07 FRAMATOME ALSTOM
St. Laurent A-2 515 530 1,475 1971-07-04 FRAMATOME ALSTOM
St. Laurent B-1 915 956 2,785 1981-01-04 FRAMATOME ALSTOM
St. Laurent B-2 880 956 2,785 1981-05-12 FRAMATOME ALSTOM
Lifetime performance, through 2025
Unit Electricity Supplied Load Factor Energy Availability Operating Factor
St. Laurent A-1 45.3 TWh 58.6% 71.0% 71.9%
St. Laurent A-2 46.9 TWh 54.1% 58.0% 64.4%
St. Laurent B-1 245.5 TWh 71.8% 74.7% 77.2%
St. Laurent B-2 236.4 TWh 68.2% 72.3% 75.4%
Operator: ÉLECTRICITÉ DE FRANCE
Owner: ÉLECTRICITÉ DE FRANCE
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-14.

Working Here

Per Diem Rates FY 2026

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Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from the U.S. State Department foreign per diem tables for FY 2026.
$220
Lodging/Night
$132
M&IE/Day
$352
Total/Day
France: rate for locations the State Department does not list separately
U.S. Department of State foreign per diem, for U.S. government and contractor travel.

Photos

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Photos of this facility from the NukeWorker photo gallery. Click the header or any photo to browse the full album.

Facility Map

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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.

47.7201, 1.57904

Location & Contact

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Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
Address:
Saint-Laurent-Nouan, Centre-Val de Loire, France
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Plant Facts

About This Site

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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: Saint-Laurent Nuclear Power Plant; ASN: Les cahiers Histoire de l'ASN #1.

Saint-Laurent is a nuclear power site in the commune of Saint-Laurent-Nouan, in the Loir-et-Cher department of Centre-Val de Loire, on the Loire river. It lies about 28 km upstream of Blois and 30 km downstream of Orléans.

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Construction began in 1963. The two A units were gas-cooled, graphite-moderated (UNGG) reactors, connected to the grid in March 1969 and August 1971 and permanently shut down in April 1990 and May 1992. On 17 October 1969 fuel elements melted in A-1, and on 13 March 1980 fuel melted in A-2. Both events were later rated level 4 on the International Nuclear Event Scale, which was created in 1994. The two B units are pressurized water reactors connected to the grid in January and June 1981.