ENS Event | |
|---|---|
19:00 Nov 2, 2004 | |
| Title | Unanalysed Condition - Inadequate Cable Separation |
| Event Description | On 11/2/04 at 1400, Seabrook Station determined that a potential scenario involving a fire could result in the loss of the Train A and Train B centrifugal charging pumps (CCP). During a fire, inadequate cable separation could result in the spurious closure of one of two series volume control tank (VCT) outlet valves. This would result in a loss of suction to the operating CCP and eventual loss of the pump. The second CCP is assumed to be lost as a result of the same fire. This condition was concluded to be reportable pursuant to 10CFR50.72(b)(3)(ii)(B) as a condition that resulted in the plant being in an unanalyzed condition that significantly degrades plant safety.
Compensatory measures include establishing a roving fire watch in the affected fire zones, operator briefings, and limiting combustible material in the affected fire zones. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Seabrook  New Hampshire (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+-1.4 h-0.0583 days <br />-0.00833 weeks <br />-0.00192 months <br />) | |
| Opened: | Pat Leary 17:36 Nov 2, 2004 |
| NRC Officer: | Bill Gott |
| Last Updated: | Nov 2, 2004 |
| 41167 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 411672004-11-02T19:00:0002 November 2004 19:00:00
[Table view]10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalysed Condition - Inadequate Cable Separation 2004-11-02T19:00:00 | |