Nine Mile Point 2 nuclear unit taken offline

The Nine Mile Point 2 nuclear unit, which is operated by Exelon (NYSE:EXC), was taken offline Feb. 18, after water levels in the unit’s reactor temporarily increased, according to a company press release.

Unit 2 was still listed at zero generation in the Nuclear Regulatory Commission (NRC) daily reactor status report issued early Feb. 19. Nine Mile Point 1 continued to operate at 98% capacity.

Station equipment responded as designed during the shutdown. The unit remains offline and reactor water levels have returned to normal. Company technical experts are working to determine the cause of the level increase.

Like most other companies, Exelon does not say when it expects units to return to service from unplanned outages.

Both the NRC resident inspector and the New York State Public Service Commission were notified.

The Nine Mile Point nuclear station is located seven miles northeast of Oswego, N.Y., and 50 miles north of Syracuse, N.Y.  The station can produce more than 1,937 MW.

Unit 2 is the larger and newer of the two units, according to GenerationHub data. Both units are boiling water reactors (BWRs).

In 2014, Exelon assumed operational control of five Northeast units held by Constellation Energy Nuclear Group (CENG). The CENG units are jointly owned by Exelon and EDF Group.

EDF has an option to sell its stake in the CENG units to Exelon at fair market value between 2016 and 2022.

About Wayne Barber 4201 Articles
Wayne Barber, Chief Analyst for the GenerationHub, has been covering power generation, energy and natural resources issues at national publications for more than 20 years. Prior to joining PennWell he was editor of Generation Markets Week at SNL Financial for nine years. He has also worked as a business journalist at both McGraw-Hill and Financial Times Energy. Wayne also worked as a newspaper reporter for several years. During his career has visited nuclear reactors and coal mines as well as coal and natural gas power plants. Wayne can be reached at