05000272/LER-1983-014, Forwards LER 83-014/03L-0.Detailed Event Analysis Encl

Forwards LER 83-014/03L-0.Detailed Event Analysis Encl

ML20069D184
Person / Time
Site:	Salem
Issue date:	03/10/1983
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20069D188	List: 05000272/LER-1983-014, Forwards LER 83-014/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8303180305
Download: ML20069D184 (3)

LER-2083-014, Forwards LER 83-014/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2722083014R00 - NRC Website

text

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O PSEG l Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station March 10, 1983 i

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Mr. R. C. Haynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE _ OCCURRENCE 83-014/03L 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 83-014/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours, H. J. Midura General Manager -

! Salem Operations RF:ks f//[

CC: Distribution 8303180305 830310 PDR ADOCK 05000272 n7 S PDR fr The Energy People 'f s wo vow n m

Report Number: 83-014/03L Report Date: 03-07-83 Occurrence Date: 02-09-83

-Facility:L Salem Generating Station Unit 1 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Reactor Coolant System - Leakage Detection Systems - Containment Sump Monitoring System - Inoperable.

This report'was initiated by Incident' Report 83-038.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 4 - RX Power 0 % - Unit Load 0 MWe.

DESCRIPTION OF OCCURRENCE:

At 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br />, February 9, 1983, during routine shutdown operation, the Control Room Operator discovered that the auxiliary alarm typewriter had failed. Since containment sump pump start and stop times are printed out on the typewriter, the failure rendered the Containment Sump / Monitoring System inoperable. Appropriately, Technical Specification Action Statement 3.4.6.1 was entered. A meter was temporarily connected to monitor containment sump pump operation directly. Redundant Reactor Coolant System (RCS) leakage detection systems were operable throughout the occurrence.

APPARENT CAUSE OF OCCURRENCE:

~

Investigation of the problem with the auxiliary alarm typewriter revealed _that the failure had resulted from a failed printed circuit- ,

board in the Auxiliary Annunciator-System. No recent failures of this type had.been noted; several previous instances where problems with annunciator sytem circuit boards had resulted in inoperability of the Containment Sump Monitoring System have been documented (See LERs 80-015/03L and 81-095/03L).

-A number of other cases where failures of the auxiliary alarm typewriter itself had occurred are also documented. The dependence of the Containment Sump Monitoring System on the auxiliary alarm typewriter for. indication underlies the occurrence.

ANALYSIS OF OCCURRENCE:

The; Containment Sump Monitoring System is utilized as an RCS leakage detection system to monitor and detect leakage from the Reactor Coolant 1Presaure Boundary. The boundary is one of multiple fission product boundaries required to contain radioactive fission' products

LER 83-014/03L. 3 ANAIYSIS OF~ OCCURRENCE: (cont'd) during accident conditions. Since the redundant leakage detection-systems were operable, and no degradation of the boundaries occurred, the. event involved no risk ~to the health and safety of_the public.

=Due to the~1oss of redundancy, the occurrence constituted operation in a degraded mode permitted by a-limiting condition for operation. The event is therefore reportable in accordance with Technical Specification 6.9.1.9b.

Action Statement-3.4.6.1 requires:

With only_two of the above required leakage detection systems' operable, operation may continue for up to 30 days provided grab

. samples of the containment atmosphere are obtained and analyzed at least once per.24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> when the1 required gaseous and/or particulate radioactivity monitoring system is inoperable; otherwise, 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:

With the temporary meter installed, indication of containment sump-pump operation was regained. The Containment Sump Monitoring System was declared operable and Action Statement 3.4.6.1 was terminated-at 2145 hours0.0248 days <br />0.596 hours <br />0.00355 weeks <br />8.161725e-4 months <br />, February 9, 1983. . The Auxiliary Annuncia:or System vendor was contacted; the vendor identified the problem and replaced the failed circuit board. The system including the typewsiter was

- satisfactorily tested and restored to service on Febrt ary 13, 1983.

Due to the recurrence of this type of problem, Design Change Request

.1SC-0900 has been submitted to install-overhead annunct.ators for direct indication-of containment sump pump operation. Implementation of the design change commenced December 2, 1982.

FAILURE DATA:

Rochester Instrument Systems, Inc.

Disk Interface Module Model RA-1814 Prepared By R. Frahm '

G'eneral Manager -

Salem Operations SORC Meeting No.83-028 e