ML20134N164
| ML20134N164 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 11/20/1996 |
| From: | Peckham M NEBRASKA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NLS960221, NUDOCS 9611260197 | |
| Download: ML20134N164 (3) | |
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COOPER NUCLEAR STATON r
i-P.O. BOX 98. SROWNVLLE. NESRASKA 08321 Nebraska Public Power District
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3 NLS960221'-
- November 20,1996 r
U. S. Nuclear Regulatory Commission Attention: Document Control Desk
- Washington, D.C. 20555-0001 P
Subject:
Special Report Pursuant to Technical Specification 3.15.C.2 l
Cooper Nuclear Station, NRC Docket 50-298, DPR-46 l
Gentlemen:
On November 19,1996, the_ electric-driven and diesel-driven fire pumps were placed in the pull-to-lock position to accommodate planned maintenance on the Fire Suppression Water (FSW) System.
- The FSW system was thereupon rendered inoperable for approximately five and one half hours.
Cooper Nuclear Station (CNS) Technical Specification 3.15.C.2 requires the submittal of a Special Report by the following working day whenever the FSW System is inoperable. The report is to discuss the cause of the inoperability, action taken, and plans and schedule for restoring the system to an operable status.
Cause of the Inonerability Flow for the CNS FSW System is provided by one electric-driven pump (FP-P-E) and one diesel-driven pump (FP-P-D). An additional non-Technical Specification electric pump (FP-P-C) is j
available as an installed backup. The Fire Water Pumps auto-start on low fire water header pressure.
l An electric jockey pump maintains the header pressurized to prevent inadvertent pump starts.
At 0800 on November 19,1996, fire water pumps FP-P-E and FP-P-D were placed in the pull-to-lock position to prevent inadvertent pump starts while maintenance _was performed on the jockey pump. Planned maintenance was concurrently performed on the discharge relief valve for FP-P-E.
With thejockey pump out of service, alternate means were established to pressurize the fire water header (albeit below normal system pressure). This configuration left FP-P-D available for manual starting and the backup electric pump FP-P-C available for providing alternate automatic FSW
- system capability.
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961126019'T 961120 PDR. ADOCK 05000298?
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a NLS960221 November 20,1996 Page 2 of 2 Action Taken FP-P-E and FP-P-D were returned to service at 1332 that day following the completion of the' planned maintenance on the jockey pump and the FP-P-E discharge relief valve. The NRC was -
informed of this event by a required 24-hour telephone notification at 1439 on November 19,1996.
Plans and Schedule for Restorina System to Ooerability As discussed above, the FSW system has been restored to operability. Owing to the availability of backup automatic FSW pump capacity and the ability to manually actuate r" P-D if required, the safety significance of this configuration was minimal.
Sincerely, M. F. Peckham Plant Manager
/wrv cc:
Regional Administrator USNRC - Region IV Senior Project Manager USNRC - NRR Project Directorate IV-1 Senior Resident Inspector USNRC NPG Distribution
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l ATTACHMENT 3 LIST OF NRC COMMITMENTS Correspondence No:
'NLS960221 The following table identifies those actions committed to by the District in this document.
Any other actions discussed in the submittal represent intended or
. planned actions by the District.
They e.re described to the NRC for the NRC's information and are not regulatory commitments.
Please notify the Licensing Manager at Cooper Nuclear Station of any questions regarding this document or any
{
associated regulatory commitments.
COMMITTED DATE COMMITMENT OR OUTAGE None 1
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PROCEDURE NUMBER 0.42 l
REVISION NUMBER 1.2 l
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