ENS Event | |
|---|---|
10:15 Feb 18, 2013 | |
| Title | |
| Event Description | On February 18, 2013 at 0515 hours0.00596 days <br />0.143 hours <br />8.515212e-4 weeks <br />1.959575e-4 months <br />, with the reactor at 100% core thermal power, 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 time during performance of quarterly surveillance testing of the Scram Discharge Instrument Volume Vent and Drain Valves. This action was taken consistent with NRC IE Bulletin 80-14.
Currently, station engineering is evaluating the valve stroke time trend data of CV-302-22B and a plan to address this issue will be developed as part of the Corrective Action Program. Pilgrim Technical Specification 3.3.G applies due to the inoperability of CV-302-22B. This notification is being made in accordance with NRC IE Bulletin 80-14, 'Degradation of BWR Scram Discharge Volume Capability,' Part A.3, which states, 'By procedures, require that the SDV [scram discharge volume] vent and drain valves 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). This event has no impact on the health and safety of the public. The NRC Senior Resident Inspector has been informed. The licensee will inform the State. |
| Where | |
|---|---|
| Pilgrim Massachusetts (NRC Region 1) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+6.25 h0.26 days <br />0.0372 weeks <br />0.00856 months <br />) | |
| Opened: | Mike Hettwer 16:30 Feb 18, 2013 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Feb 18, 2013 |
| 48766 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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 | |