ENS 41821
ENS Event | |
|---|---|
20:48 May 12, 2005 | |
| Title | Invalid Actuation of the Division 2 Shutdown Service Water (Sx) System Pump. |
| Event Description | The following 60-day report is being made under 50.73 (a)(2)(iv)(A) for an invalid actuation of the Division 2 Shutdown Service Water (SX) system pump that occurred at 1548 hours0.0179 days <br />0.43 hours <br />0.00256 weeks <br />5.89014e-4 months <br /> on May 12, 2005. As allowed by 10CFR50.73(a)(1) this notification is being made via telephone. NUREG-1022, Revision 2 identifies the information that needs to be reported as follows:
(a) The specific train(s) and system(s) that were actuated. "On May 12, 2005, the Division 2 SX system pump automatically started during the performance of surveillance testing procedure, 9069.01, SX Operability, while preparing to secure the pump and restore the Plant Service Water (WS) system feed to the Division 2 SX piping. As part of the restoration of the system to its normal standby lineup, the handswitch for the 1SX014B (WS to SX cross-tie) valve was being held in the Open position while the handswitch for the Division 2 SX pump was held in the Off position. While monitoring system pressure to allow releasing the handswitch for the SX pump, system pressure had not increased above the automatic initiation setpoint when the operator's hand relaxed on the grip of the handswitch of the pump enough to allow the pump to start. The inadvertent actuation of the Division 2 SX pump was not in response to plant conditions requiring the pump to automatically start. (b) Whether each train actuation was complete or partial. "The automatic start of the Division 2 SX pump was complete, but was limited to Division 2 only. Divisions 1 and 3 were in standby and were not affected by the opening of the Division 2 WS to SX cross-tie valve. (c) Whether or not the system started and functioned successfully. "The automatic start of the Division 2 SX pump was a successful start and functioned successfully. The NRC Resident Inspector was notified of this notification. |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1292.4 h53.85 days <br />7.693 weeks <br />1.77 months <br />) | |
| Opened: | Jim Peterson 17:12 Jul 5, 2005 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Jul 5, 2005 |
| 41821 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (95 %) |
| After | Power Operation (95 %) |
WEEKMONTHYEARENS 528622017-05-18T16:15:00018 May 2017 16:15:00
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