ENS 48801
ENS Event | |
|---|---|
15:45 Mar 1, 2013 | |
| Title | |
| Event Description | Scram Discharge Volume (SDV) Valve Declared Inoperable.
On March 1, 2013 at 1045 hours0.0121 days <br />0.29 hours <br />0.00173 weeks <br />3.976225e-4 months <br />, with the reactor at 94% core thermal power (CTP), a scram discharge volume valve, CV-302-22B was declared inoperable as required by station procedural direction due to an observed degradation in opening stroke timing during performance of a compensatory surveillance test of the Scram Discharge Instrument Volume Vent and Drain Valve. This report is provided consistent with NRC IE Bulletin 80-14. Currently, station engineering is evaluating the valve stroke time trend data of CV-302-22B and plans to address this issue will be developed as part of the Corrective Action Program (CAP). Pilgrim Technical Specification (TS) 3.3.G applies due to the inoperability of CV-302-22B. This notification is being made in accordance with the NRC IE Bulletin 80-14, 'Degradation of BWR Scram Discharge Volume Capability,' Part A.3., which states, 'By procedures, require that the SDV vent and drain valve be normally operable, open and periodically tested. If these valves are not operable or are closed for more than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> in any 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period during operation, the reason shall be logged and the NRC notified within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Prompt Notification).' A similar event report was generated for the same valve on February 18, 2013. Compensatory measures applicable to the original event report included a revised lubrication application and additional surveillance testing. Although surveillance tests subsequent to the original February 18, 2013 tested demonstrated valve operability, the initial March 1, 2013 test did not meet opening stroke time operability requirements for the valve. Subsequent stroke time testing has met the opening stroke time operability requirements for the valve. This event has no impact on the health and safety of the public. The USNRC Senior Resident Inspector has been informed. See similar event EN #48766. |
| Where | |
|---|---|
| Pilgrim Massachusetts (NRC Region 1) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+1.87 h0.0779 days <br />0.0111 weeks <br />0.00256 months <br />) | |
| Opened: | Kenneth Gracia 17:37 Mar 1, 2013 |
| NRC Officer: | Charles Teal |
| Last Updated: | Mar 1, 2013 |
| 48801 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (94 %) |
| After | Power Operation (94 %) |
Pilgrim with Other Unspec Reqmnt | |
WEEKMONTHYEARENS 488012013-03-01T15:45:0001 March 2013 15:45:00
[Table view]Other Unspec Reqmnt 24 Hour Notification of Inoperable Scram Discharge Volume Valve Based on Nrc Bulletin 80-14 ENS 487662013-02-18T10:15:00018 February 2013 10:15:00 Other Unspec Reqmnt 24 Hour Notification of Inoperable Scram Discharge Volume Valve Based on Nrc Bulletin 80-14 2013-03-01T15:45:00 | |