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Event Notification Report for April 15, 2008
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U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
04/14/2008 - 04/15/2008
** EVENT NUMBERS **
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| Power Reactor |
Event Number: 44138 |
Facility: FT CALHOUN
Region: 4 State: NE
Unit: [1] [ ] [ ]
RX Type: [1] CE
NRC Notified By: ERICK MATZKE
HQ OPS Officer: JOE O'HARA
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Notification Date: 04/14/2008
Notification Time: 16:05 [ET]
Event Date: 04/14/2008
Event Time: 12:45 [CDT]
Last Update Date: 04/14/2008
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Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
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Person (Organization):
JEFFREY CLARK (R4)
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| Unit |
SCRAM Code |
RX CRIT |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 1 |
N |
Y |
100 |
Power Operation |
100 |
Power Operation |
Event Text
HIGH ENERGY LINE BREAK ANALYSIS REVEALED POTENTIAL ACCIDENT MITIGATION DEFICIENCY
"During review of a High Energy Line Break (HELB) analysis a condition was discovered where a break in the auxiliary steam system could result in a loss of all the containment fans and coolers, which are required to be maintained operable due to procedural restrictions to mitigate a design basis accident.
"The plant entered Technical Specification (T.S.) 2.0.1 at 1245 CDT. This specification requires a plant shutdown within 6 hours. Operations personnel isolated auxiliary steam to the affected areas of the Auxiliary Building at 1305 CDT. With auxiliary steam isolated to the Auxiliary Building, containment fans and associated coolers were restored to an operable status. Plant exited T.S. 2.0.1 at 1305 CDT."
The licensee notified the NRC Resident Inspector. |
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