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Columbia Generating Station Sets
Longest Run Record of 683 Days

by Staff
Tri-City Herald, May 9, 2015

An aerial view of Energy Northwest's Columbia Generating Station near Richland. Energy Northwest's nuclear power plant set a record early Saturday for its longest continuous operational run.

When the reactor at Columbia Generating Station was shut down for a scheduled refueling and maintenance outage, the station had been operating for 683 days straight.

It was the first time the plant achieved a "breaker to breaker" run in its 30-year history, according to Energy Northwest officials. During that time, Columbia produced nearly 18 million megawatt-hours of electricity and operated at a more than 98 percent capacity factor, a news release said.

The previous record of 505 days, set in April 2011, was broken in November.

Columbia Generating Station sells its power at-cost to the Bonneville Power Administration, and 92 Northwest utilities receive a percentage of its output.

Energy Northwest is spending a budgeted $106 million on this outage, with about $28.5 million of that capital costs. A portion of the fuel in the plant is replaced every two years, with this outage expected to last 42 days.

Columbia Generating Station Sets Longest Run Record of 683 Days
Tri-City Herald, May 9, 2015

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