Auxiliary building at Ft. Calhoun surrounded by water after berm failure — NRC letter said if water enters auxilary building, could have station blackout with core damage in hours

Published: June 26th, 2011 at 3:04 pm ET
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Flood berm collapses at Nebraska nuclear plant, Associated Press, June 26, 2011:

[...] The [NRC] had inspectors at the plant 20 miles north of Omaha when the 2,000-foot berm collapsed about 1:30 a.m. Sunday. Water surrounded the auxiliary and containment buildings at the plant, it said in a statement. [...]

A Nuclear Plant’s Flood Defenses Trigger a Yearlong Regulatory Confrontation, New York Times, June 24, 2011:

[...] At 1,010 feet, water would begin to enter the auxiliary building, “shorting power and submerging pumps. The plant could then experience a station blackout with core damage estimated within 15 to 18 hours,” under a worst-case scenario, the NRC said. [...]

The power supply has now been cut at Ft. Calhoun after water surrounded the main electrical transformers. The plant is currently running on emergency generators as workers try to restore electricity.

Published: June 26th, 2011 at 3:04 pm ET
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Related Posts

  1. 8-month-old NRC letter: At 1,010 ft water would enter Ft. Calhoun’s auxiliary building, shorting power and submerging pumps; Could then have a station blackout with core damage within 15-18 hours — Water now at 1,007 ft June 25, 2011
  2. River water now surrounds spent fuel pool building and main reactor building at Ft. Calhoun after collapse of water-filled dam — Barriers at entrances to keep water out June 27, 2011
  3. Floodwater enters turbine building at Ft. Calhoun nuclear plant June 27, 2011
  4. Ft. Calhoun nuke plant now running on emergency generators as workers try to restore electricity — Power supply cut after water surrounded main electrical transformers June 26, 2011
  5. 100% chance of reactor core damage if floodwaters went above 1010 ft. at Ft. Calhoun nuke plant, NRC said in 2010 — River now around 1,007 ft. and expected to rise June 27, 2011

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