ENS 41212
ENS Event | |
|---|---|
22:22 Nov 19, 2004 | |
| Title | Technical Specification Required Shutdown Due to a Steam Leak on an Instrument Isolation Valve Inside Containment |
| Event Description | The following information was obtained from the licensee via facsimile:
On November 9, 2004, NMC personnel performed a containment entry for Point Beach Nuclear Plant Unit 2 to locate and identify the source of a secondary steam leak. A leak was suspected due to increased pumping of the Unit 2 containment sump 'A'. A steam leak was identified on the body of valve 2MS-465D. This valve is an isolation valve for main steam flow transmitter 2FT-465. For containment isolation considerations, the main steam system is considered to be a closed system inside containment. The steam leak discovered on 2MS-465D cannot be isolated from containment penetration P-1, the main steam line penetration. Accordingly, we declared Technical Specification Condition 3.6.3.C not met. (This condition is applicable to penetration flow paths with only one containment isolation valve and a closed system) and entered TSAC [Technical Specification Action Condition] C.1. The required action for this condition is to isolate the affected penetration flow path with a completion time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. In order to repair this valve wall leak, it will be necessary to shutdown and cooldown PBNP Unit 2. Accordingly, at 1622 CST we initiated a reactor shutdown of PBNP Unit 2. Since we anticipate that we would be unable to [meet] the allowed completion time for this TSAC, we have determined that this reactor shutdown is required by the Technical Specifications and is reportable in accordance with 10 CFR 50.72.(b)(2)(i). The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Point Beach  Wisconsin (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| LER: | 05000301/LER-2004-003 |
| Time - Person (Reporting Time:+-3.35 h-0.14 days <br />-0.0199 weeks <br />-0.00459 months <br />) | |
| Opened: | Mike Meyer 19:01 Nov 19, 2004 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Nov 19, 2004 |
| 41212 - NRC Website | |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 503962014-08-24T05:00:00024 August 2014 05:00:00
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