ML20028E785
| ML20028E785 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 01/13/1983 |
| From: | Midura H Public Service Enterprise Group |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20028E786 | List: |
| References | |
| NUDOCS 8301280195 | |
| Download: ML20028E785 (3) | |
Text
~
O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station January 13, 1983 Mr. R. C. Haynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. Haynes:
LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-149/03L Pursuant to the requirements of Salem Generating Station Unit No. 2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-149/03L. This report is required within thirty (30) days of the occurrence.
Sincerely yours, Y Y' '
H. J. Midura General Manager -
Salem Operations RF:ks CC: Distribution l
8301280195 830113
{DRADOCK 05000311 PDR
- The Energy People $6#
95 2189 (20M) 1181
1.
Repprt Number: 82-149/03L Report Date: 01-13-83 Occurre r 7 ate: 12-28-82 Facility: Salem Generating Station Unit 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey. 08038 -
IDENTIFICATION OF OCCURRENCE:
Plant Systems - No. 21 Service Water Loop - Inoperable.
This report was initiated by Incident Report 82-524.
I CONDITIONS PRIOR TO OCCURRENCE:
Mode 1 - RX Power 66 % - Unit Load 690 MWe.
t DESCRIPTION OF OCCURRENCE:
At 1738 hours0.0201 days <br />0.483 hours <br />0.00287 weeks <br />6.61309e-4 months <br />, December 28, 1982, during routine surveillance on_No.
21 Service Water Pump, an operator noticed that the discharge strainer differential pressure was greater than the 30 psid required. On December 29, due to the excessive differential, the pump was de-energized and tagged out for investigation of the problem. 103. 122 Service Water Pump was already inoperable due to a damaged breaker, and with No. 21 Pump out of service, No. 21 Service Water' Loop was
. rendered inoperable. Technical Specification Action Statement 3.7.4 was entered, retroactive to the time of' discovery of the problem. The redundant service water loop was operable throughout the occurrence and was capable of meeting plant service water requirements.
3 APPARENT CAUSE OF OCCURRENCE:
~
Investigation revealed that grassy. debris and silt which are drawn into the service water system had plugged the pump discharge strainer.-
A program to routinely remove and clean strainer tubes is in effect, and reduces the frequency of problems with plugged strainers to an acceptable level.
The problem would not normally result in the inoperability of a service water loop unless related portions of the system are concurrently inoperable. Due to A.C. power' source requirements,'
repair of No. 22 Pump breaker cannot be completed until the forthcoming refueling outage. 'The occurrence may'be related to an increase in detritus passing down the Delaware River associated with fall weather conditions. For these reasons, and since no previous occurrences of this nature were noted, the event was assumed to be of an isolated nature.
ANALYSIS OF OCCURRENCE: ,
The operability of the Service Water System ensures that sufficient cooling capacity is available for continued operation of safety 1 . .
LER 82-149/03L .
ANALYSIS OF OCCURRENCE: (cont'd)'
related equipment during normal and accident conditions. The redundant cooling capacity of this system, assuming a single failure,.
is consistent with assumptions made in the accident analyses..
Since the redundant loop was operable, no risk to the health and safety of the public was involved. Due to the loss _in redundancy, the event constituted operation in a degraded mode permitted by a' limiting condition for operation. The occurrence is therefore reportable in accordance with Technical Specification 6.9.1.9b.
Action Statement 3.7.4 requires:
With only one service water loop operable, restore at least two loops to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and.in cold shutdown within-the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
CORRECTIVE ACTION:
The strainer tubes were removed and cleaned, the strainer was reassembled, and No. 21 Service Water Pump was satisfactorily tested.
No. 21 Service Water Loop was declared operable at 0140-hours, December 30, 1982, and Action Statement 3.7.4 was terminated. In view of the nature of the occurrence, no further action was deemed necessary.
FAILURE DATA:
Not Applicable Prepared By R. Frahm / h)t/[ b d deneral Manager -
Salem Operations SORC Meeting No. 89-03 1
l l
l l
l
-. - _ _ - -. - . .-- --. . _ - _ .