ML18153C504
| ML18153C504 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 01/18/1991 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 91-014, 91-14, IEB-88-004, IEB-88-4, NUDOCS 9101240322 | |
| Download: ML18153C504 (3) | |
Text
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VIRGINIA ELECTRIC AND PowER COMPANY RICHMOND, VIRGINIA 23261 January 18, 1991 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555 Serial No.91-014 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 1 NURCS/ets Docket No.
50-280 License No.
DPR-32 NRC BULLETIN 88-04, POTENTIAL SAFETY RELATED PUMP LOSS COMPLETED ACTIONS In accordance with NRC Bulletin 88-04, this letter provides notification of the completion of the long term corrective action for safety-related pumps for Unit 1. A summary of our completed corrective actions is provided in the Attachment to this letter.
Should you have any further questions, please contact us.
Very truly yours, JL~-
- w. L.S(e~)
Senior Vice President - Nuclear Attachment cc:
U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Mr. W. E. Holland NRC Senior Resident Inspector Surry Power Station 9101240:322 PDR A:OOC~~
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ATTACHMENT REPLY TO A REQUEST FOR ADDITIONAL INFORMATION ON STATUS OF CORRECTIVE ACTIONS FOR NRC BULLETIN 88-04 POTENTIAL SAFETY RELATED PUMP LOSS I.
RESIDUAL HEAT REMOVAL (AHR)
Corrective Actions Status:
No -corrective actions necessary. Engineering will initiate a study to evaluate enhancements of cooldown and possible heatup operation which may reduce pump maintenance requirements.
- COMPLETE II.
LOW HEAD SAFETY INJECTION (LHSI)
Corrective Actions:
Status:
Small break LOCA scenarios will be conducted by November 1, 1988 on the simulator to verify the EOPS adequately address and therefore minimize operation of the LHSI pumps.
COMPLETE Ill. HIGH HEAD SAFETY INJECTION (HHSI)
Corrective Actions:
Status:
No corrective actions are deemed necessary.
COMPLETE IV. AUXILIARY FEED WATER (AFW)
Corrective Actions:
Status:
Status:
Short Term
- a.
Appropriate procedures will be reviewed and revised, as necessary, by November 1, 1988 to minimize operation at low flow/minimum flow recirculation.
COMPLETE
- b. Operation/Engineering personnel will be directed to limit use of these pumps in leak testing.
COMPLETE
L e
IV. AUXILIARY FEED WATER (continued)
Corrective Actions:
Status:
Status:
Long Term
- a. One.
auxiliary feedwater pump will be disassembled and inspected for degradation during the 1990 and 1991 refueling outage for each unit.
The remaining pumps will be inspected during subsequent outages. Inspection results will determine the required future inspection frequency and number of pumps inspected.
COMPLETE.
Aux*iliary feedwater pump, 1-FW-P-3A, was disassembled and inspected for degradation during the recent refueling outage for Unit 1. The inspection results were evaluated and it was conservatively estimated that at least six years of remaining pump life exist under current operating conditions for the Unit 1 pumps. In addition, the 100% full flow test lines described below will improve operating conditions and should further prolong pump life.
- b. Larger minimum flow recirculation lines are scheduled to be installed in the 1990 and 1991
. refueling outages for Units 1 and 2, respectively.
COMPLETE.
100% full flow test lines were installed in Unit 1 during the refueling outage which completed on December 20, 1990.