05000311/LER-1982-031, Forwards LER 82-031/03L-0.Detailed Event Analysis Encl

Forwards LER 82-031/03L-0.Detailed Event Analysis Encl

ML20053E846
Person / Time
Site:	Salem
Issue date:	05/19/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20053E847	List: 05000311/LER-1982-031, Forwards LER 82-031/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8206100146
Download: ML20053E846 (3)

LER-2082-031, Forwards LER 82-031/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3112082031R00 - NRC Website

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O PSEG Putilic Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station May 19, 1982 Mr. R. C. Ilaynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Ilaynes:

LICENSE NO. DP R-7 5 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-031/03L Pursuant to the requirements of Salem Generating Station Unit No. 2, Technical Specifications, Section 6.9.1.9.b, we are subm_tting Licensee Event Report for Reportable Occurrence 82-031/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

// k[bd W H. J. Midura General Manager -

Salem Operations f

F:ks CC: Distribution F206100146 820519 PDR ADOCK 05000311 S PDR The Energy People M towww.o n m

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Deport Number: 82-031/03L Report Date: 05-19-82 l l

Occurrence Date: 04-24-8?

l Facility: Salem Generating Station, Unit 2 '

Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

1 Loss of No. 2C Vital Bus - Undervoltage.

This report was initiated by Incident Report 82-098.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 100% - Unit Load 1140 MWe DESCRIPTION OF OCCURRENCE:

On April 24, 1982, while diluting with No. 22 Primary Water Makeup Pump, the 2C Vital Bus Undervoltage overhead annun-ciator, 2B and 2C SEC Loss of Voltage auxiliary annunciators, and 2A SEC Control Voltage auxiliary annunciator alarmed.

The Control Room Operator discovered that No. 2C Vital Bus Infeed Breaker 22CSD had tripped, de-energizing the bus.

At 0830 hours0.00961 days <br />0.231 hours <br />0.00137 weeks <br />3.15815e-4 months <br />, No. 2C Vital Bus was declared inoperable, and Action Statement 3.8.2.1.a was entered.

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

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Breaker 22CSD tripped as a result of a known noise problem with the Safeguards Equipment Control (SEC) System.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.8.2.1.a requires:

With less than the specified complement of A.C. busses operable or energized, restore the inoperable bus (ses) to an operable and energized status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 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 />.

l

LER 82-031/03L . . . .

I j CORRECTIVE' ACTION:

At 0835 hours0.00966 days <br />0.232 hours <br />0.00138 weeks <br />3.177175e-4 months <br />, April 24, 1982, Breaker 21CSD was closed in, and No. 2C Vital Bus was re-energized. The bus was declared operable, and Action Statement 3.8.2.1.p was terminated.

2 Design Change Request 2Ecl387 has been issued to install noise suppression circuitry in the SEC System. A 'committment to sub-mit a Supplemental Report upon completion was made in LER 82-Ol9/03L, Unit 2. s s

i FAILURE DATA: .

! Automation Industries, Inc. '

Card File Assembly Vitro Dwg. No. 1964-1033 i

I i

i Prepared By R._Frahm //kb[O General' Manager Salem Operations SORC Meeting No'. 82-51 i

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