Event Number: 46965, Current Event Notification Report for June 17, 2011, U.S. Nuclear Regulatory Commission, June 17, 2011:
Facility: FORT CALHOUN
Notification Date: 06/16/2011
Notification Time: 14:46 [ET]
Event Date: 06/16/2011
Event Time: 12:30 [CDT]
Event Text: ADDITIONAL PENETRATION IDENTIFIED FOR MITIGATION DURING WALKDOWN
“Operations identified a potential flooding issue in the Intake Structure 1007 ft. 6 in. level. The area of concern is a the hole in the floor at the 1007 ft. 6 in. level where the relief valve from FP-1A discharge pipe goes through the raw pump bay and discharges into the intake cell. There is one penetration of concern. Flooding through this penetration could have impacted the ability of the station’s Raw Water (RW) pumps to perform their design accident mitigation functions.
“Efforts are in progress to seal the penetration.
“This eight-hour notification is being made pursuant to 10 CFR 50.72 (b)(3)(v).”
The licensee notified the NRC Resident Inspector.
h/t Granny M
Published: June 17th, 2011 at 11:56 am ET
- May 16 report foreshadowed yesterday’s “event” at Calhoun nuke plant: Flooding of Intake Structure could jeopardize abilty to cool reactor June 17, 2011
- Gundersen: Intake Structure that cools reactor and spent fuel pool is probably most vulnerable part of Ft. Calhoun nuke plan — Critical that it stays dry (VIDEO) June 28, 2011
- Many containers of fuel to power pumps were washed away after breach at Ft. Calhoun nuke plant June 27, 2011
- NRC Event at flooded Ft. Calhoun nuke plant: Both Fire Suppression Pumps are inoperable — Water levels too high for surveillance tests July 25, 2011
- NRC: Alert still in effect at NJ nuclear plant — High water levels in Oyster Creek’s water intake structure remain October 30, 2012