ENS 43223
ENS Event | |
|---|---|
19:50 Mar 8, 2007 | |
| Title | Technical Specification Shutdown Due to a Degraded Seal in the "a" Reactor Recirculation Pump |
| Event Description | Reactor Recirculation Pump 'A' removed from service due to a degraded seal. TS 3.4.1 entered to meet requirement for single loop operation at 1050. When the pump was secured, the 3D monicore system failed preventing verification of thermal limits. TS 3.4.1 action D entered at 1450 required to be in mode 3 (Hot Shutdown) within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
The NRC Resident Inspector was notified of this event by the licensee. Reactor Recirculation Pump 'A' seal is degraded, no increase in leakage. Licensee is in contact with General Electric in trying to restore the 3D monicore system. All Emergency Core Cooling Systems and the Emergency Diesel Generators (all 3 divisions) are fully operable if needed and the electrical grid is stable. Nine Mile Point Unit 1 is in coastdown for a scheduled refueling outage. Nine Mile Point Unit 2 should be in Mode 3 (Hot Shutdown) by 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> on 03/09/07.
On March 8, 2007 at 1709, surveillance for thermal limit verification was completed satisfactorily and TS 3.4.1 was exited. The reactor was no longer required to be shutdown per Technical Specifications; however, the plant shutdown continued for performance of maintenance activities. R1DO (Neil Perry) notified. The NRC Resident Inspector was notified of this update by the licensee. |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.58 h-0.149 days <br />-0.0213 weeks <br />-0.0049 months <br />) | |
| Opened: | Roy Green 16:15 Mar 8, 2007 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Mar 9, 2007 |
| 43223 - NRC Website | |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (50 %) |
WEEKMONTHYEARENS 496772013-12-26T18:01:00026 December 2013 18:01:00
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