05000272/LER-1981-074, Forwards LER 81-074/01T-0.Detailed Event Analysis Encl

From kanterella
(Redirected from ML20010G455)
Jump to navigation Jump to search
Forwards LER 81-074/01T-0.Detailed Event Analysis Encl
ML20010G455
Person / Time
Site: Salem 
Issue date: 09/08/1981
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010G456 List:
References
NUDOCS 8109210181
Download: ML20010G455 (3)
v • d • e


LER-1981-074, Forwards LER 81-074/01T-0.Detailed Event Analysis Encl
Event date:
Report date:
2721981074R00 - NRC Website
v • d • e

text

ict O PSEG Public Service Flectric and Ca Company P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Station September 8, 1981 e ~.'s[,

s d

/C

,6} th J b

z;

- SEP181981* -

( h peh'* M i Ys h

Mr.

R. C. Haynes Director of USNRC V)

Office of Inspection and Enforcement UN s7 Region 1 m/

g^i 631 Park Avenue King of Pr'tssia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DPR-70 DOCKET NO. 50-272 4

REPORTABLE OCCUllRENCE 81-74/0lT Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 81-74/OlT.

This report is required within fourteen (14) days of the occurrence.

Sincerely yours,

'sh H. J. Midura Manager - Salem Generating Station CC:

R. A. Uderitz General Manager - Nuclear Production Director, Office of Inupection and Enforcement (40 copies)

Director, Office of Management Information and Program Control (3 copies) f 0109210181 010903-p 4DOcx 0300027, ce osmo,,,,,

PDR

Report Number:

81-74/0lT Report Date:

9-8-81 Occurrence Date:

8-26-81 Facility:

Salem. Generating Station, Unit 1 s

Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENC'.:

Containment Fan Coil Unit - Service Water Leak.

This report was initiated by Incident Report 81-343.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 96% - Unit Load 1020 MWe DESCRIPTION OF OCCURRENCE:

On August 26, 1981, during a routine containment inspection, an operator discovered service water leaking from the bottom secondary coil on No. 11 containment fan coil unit (CFCU), at a rate of approximately 0.5 gallons per minute.

In accordance with NRC IE Bulletin 80-24, the NRC was noti-fied of the service water leak in containment by telephone, with written confirmation transmitted within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

No. 11 CFCU was removed from service, and declared inoperable.

Action statement 3.6.2.3.b was entered at 0125 hours0.00145 days <br />0.0347 hours <br />2.066799e-4 weeks <br />4.75625e-5 months <br />, August 26, 1981, because No. 13 CFCU was also out of service.

This occurrence constituted operation in a degraded mode in accord-ance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Equipment failure.

The service water leak was due to a pinhole leak in the bottom secondary coil on No. 11 CFCU.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.2.3.b requires with:

Two groups of containment cooling fans. inoperable, and both Containment Spray Systems operable, restore at least one group of cooling fans 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 />.

Restore both groups of cooling fans to operable status within 7 days of initial loss 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 with>a the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

2

LER 81-74/0lT CORNECTIVE ACTION:

The bottom secondary coil on No. 11 CFCU was isolated from the remainder of the coils by installing a blank flange insert between the service water inlet and outlet flanges.

As per engineering analysis, it is possible to isolate an individual cooler in this manner while retaining acceptable efficiencir of the cooler.

This cooler will be replaced during the next scheduled outage; however, no sapplementary report will lua issued.

No. 11 CFCU was tested satisfactorily and returned to service.

Action Statement 3.6.2.3.b was terminated at 1853 hours0.0214 days <br />0.515 hours <br />0.00306 weeks <br />7.050665e-4 months <br />, August 26, 1981.

1 FAILURE DATA:

Westinghouse Coil Cooler Spin No. RCMECF Prepared By F.

Dickey I

Manager - Salem /Genersting Station SORC Meeting No.

81-87

Retrieved from "https://kanterella.com/w/index.php?title=05000272/LER-1981-074,_Forwards_LER_81-074/01T-0.Detailed_Event_Analysis_Encl&oldid=4644460"