Trojan Nuclear Power Plant

Trojan Nuclear Power Plant was a pressurized water reactor nuclear power plant (Westinghouse design) in the northwest United States, located southeast of Rainier, Oregon, and the only commercial nuclear power plant to be built in Oregon. There was much public opposition to the plant from the design stage. The three main opposition groups were the Trojan Decommissioning Alliance, Forelaws on the Board, and Mothers for Peace. There were largely non-violent protests from 1977, and subsequent arrests of participants.

Trojan Nuclear Power Plant
May 2006, shortly before demolition
CountryUnited States
LocationColumbia County, Oregon, U.S.
(near Rainier, Oregon)
Coordinates46°2′18″N 122°53′6″W
StatusDemolished
Construction began1 February 1970
Commission date20 May 1976
Decommission date9 November 1992
Construction cost$460 million ($1.85 billion in 2022)
Operator(s)Portland General Electric
Nuclear power station
Reactor typePWR
Reactor supplierWestinghouse
Cooling towers1 × Natural Draft
Thermal capacity1 × 3411 MWth
Power generation
Units decommissioned1 × 1095 MW
Capacity factor53.6% (lifetime)
Annual net output4,962 GW·h (lifetime average)
External links
CommonsRelated media on Commons

The plant was connected to the grid in December 1975.

After 16 years of irregular service, the plant was closed permanently in 1992 by its operator, Portland General Electric (PGE), after cracks were discovered in the steam-generator tubing. Decommissioning and demolition of the plant began the following year and was largely completed in 2006.

While operating, Trojan represented more than 12% of the electrical generation capacity of Oregon. The site lies about twelve miles (20 km) north of St. Helens, on the west (south) bank of the Columbia River.

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