05000272/LER-1981-101, Forwards LER 81-101/03L-0.Detailed Event Analysis Encl

Forwards LER 81-101/03L-0.Detailed Event Analysis Encl

ML20033B569
Person / Time
Site:	Salem
Issue date:	11/18/1981
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20033B570	List: 05000272/LER-1981-101, Forwards LER 81-101/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-101-03, /03L-0:on 811021,while Cycling Pressurizer Auxiliary Spray Line Isolation Valve 1CV75 During Surveillance,Pressure in Pressurizer Dropped Below 2205 Psia.Caused by Incorrect Valve Liftoff Pressure Setting
References
NUDOCS 8112010529
Download: ML20033B569 (3)

LER-1981-101, Forwards LER 81-101/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721981101R00 - NRC Website

text

1 O PSEG Public Service Electric and Gas Company P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Station November 18, 1981 Mr.

R. C. Haynes A

Director of USNRC

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Office of Inspection and Enforcement

/V [pr Region 1 b

II 631 Park Avenue fg7 NOV3 01981w #

King of Prussia, Pennsylvania 19406 T,,4 p.s.acan.awan

Dear Mr. Haynes:

Nssa s

k LICENSE NO. DPR-70 q\\'

DOCKET NO. 50-272 REPORTABLE OCCURRENCE 81-101/03L 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 81-101/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours, f.

/cr t~y H.

J. Midura General Manager -

Salem Operations CC:

Distribution Ighsj 9sm9 d iim The Energy People 9

S

Report Number:

81-101/03L Report Date:

11-18-81 Occurrence Date:

10-21-81 Facility:

Salem Generating Station, Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Departure from Nucleate Boiling Parameters - Low Pressurizer Pressure.

This report was initiated by Incident Report 81-417.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 95% - Unit Load 1040 MWe DESCRIPTION OF OCCURRENCE:

On October 21, 1981, while cycling Pressurizer Auxiliary Spray Line Isolation Valve 1CV75 during surveillance, the pressure in the pressurizer dropped below 2205 PSIA for a total of five minutes.

Action Statement 3.2.5.b was entered at 1820 hours0.0211 days <br />0.506 hours <br />0.00301 weeks <br />6.9251e-4 months <br />.

This occurrence constituted operation in a degraded mode in accordance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The loss of pressurizer pressure was due to incorrect valve liftoff pressure setting requiring excessive time to cycle the 1CV75 air-operated valve open and closed, allowing an excessive amount of makeup water to condense the, team bubble in the pressurizer.

ANALYSIS OF OCCURREi?CE:

j Technical Specification 3.2.5.b requires:

l With pressurizer pressure exceeding it's limit, restore the pressure to within it's limit within two hours or reduce thermal power to less than

(

5 percent of rated thermal power within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

I LER 81-101/03L.

CORRECTIVE ACTION

The 1CV75 valve was closed by the Control Operator and the pressurizer pressure returned to normal.

Action Statement 3.2.5.b was terminated at 1825 hours0.0211 days <br />0.507 hours <br />0.00302 weeks <br />6.944125e-4 months <br />, October 21, 1981.

It was subsequently discovered that the valve liftoff pressure setting provided by the manufacturer was incorrect at 11 PSI.

The liftoff pressure was adjusted to 23 PSI and the valve was tested satisfactorily.

FAILURE DATA:

Copes - Vulcan, Inc.

Air-Operated Globe Valve Model XA-26 Prepared By K. Whitcomb

',7 f/

General Wanager -

Salem Operations SORC Meeting No.

81-119B i