05000395/LER-1982-018, Forwards LER 82-018/03L-0.Detailed Event Analysis Encl

Forwards LER 82-018/03L-0.Detailed Event Analysis Encl

ML20027D875
Person / Time
Site:	Summer
Issue date:	11/05/1982
From:	Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20027D876	List: 05000395/LER-1982-018, Forwards LER 82-018/03L-0.Detailed Event Analysis Encl 05000395/LER-1982-018-03, /03L-0:on 821008,during Surveillance Test Procedure 303.006,pressure Bistable Failed to Change Output State.Caused by Failure of Printed Circuit Logic Card.Card Replaced & Test Procedure Performed Satisfactorily
References
NUDOCS 8211100295
Download: ML20027D875 (2)

LER-1982-018, Forwards LER 82-018/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3951982018R00 - NRC Website

text

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e SOUTH CAROLINA ELECTRIC & GAS COMPANY Porf OFFICE 784 e

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VH".E PRE SIDENT November 5y@@E) g P3 00 necu.o,E.no~,

Mr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission Region II, Suite 3100 101 Marietta Street, N.W.

Atlanta, Georgia 30303

SUBJECT:

Virgil C.

Summer Nuclear Station Ducket No. 50/395 Operating License No. NPF-12 Thirty Day Written Report LER 82-018

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #82-018 for Virgil C. Summer Nuclear Station.

This Thirty Day Report is required by Technical Specification 6.9.1.13.(b) as a result of entry into Action Statement 19 of Technical Specification 3.3.2, Table 3.3-3, " Engineered Safety Feature Actuation System Instrumentation," on October 8,1982.

Should there be any questions, please call us at your convenience.

Very truly yours,

/

O.

W.

Dixo, Jr.

ARK:0WD:dwr Attachment cc:

V. C.

Summer A.

R.

Koon T.

C.

Nichols, Jr.

H.

Radin G.

H.

Fischer Site QA

0. W.

Dixon, Jr.

C.

L.

Ligon (NSRC)

H.

N.

Cyruc G.

J.

Braddick H. T.

Babb J.

L.

Skolds D.

A.

Nauman J.

B.

Knotts, Jr.

M.

B.

Whitaker, Jr.

B.

A.

Bursey W.

A. Williams, Jr.

I&E (Washington)

O.

S.

Bradham Document Management Branch R.

B.

Clary NPCP M.

N.

Browne File 9' coy 5.'s.

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r Mr. James P.

O'Reilly

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.ag LER No.82-018 J

Page Two November 5, 1982

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DETAILED DESCRIPTION OF EVENT

~

On October 8, 1982, with the Plant in Mode 3, Surveillance 4

Test Procedure (STP) 303.006, " Steam Generator "B" Steam

.'.i Pressure (IPT-0484) Instrument Operational Test," was bsin'g

.x 4 '

performed.

During the test, it was discovered that a pressure bistable (IPB-0484C) would not change output state despite varying the input about the trip and reset points.

This bistable provides a signal to the "B" loop main feedwater isolation valve logic.

The channel was placed in the tripped position per Technical Specification 3.3.2, (Table 3.3-3) te s.

Action Statement 19.

Investigation revealed that a logic card s

had failed.

The logic card was replaced, and the system was y

returned to operable status per STP-303.006 on October 8, 1982.

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PROBABLE CONSEQUENCES There was no adverse consequence as the Action Statement of- ~

the applicable Technical Specification was being complied with.

CAUSE(S) OF THE OCCURRENCE The occurrence is attributed to a failed printed circuit logic card.

IMMEDIATE CORRECTIVE ACTION TAKEN 4

The affected bistable was placed in the tripped position as required by Action Statement 19 of Technical Specification 3.3.2.

The failed card was replaced, and STP-303.006 was performed satisfactorily.

The system was returned to operable status on October 8, 1982.

ACTION TAKEN TO PREVENT RECURRENCE The licensee plans no further action regarding this event since this appears to be an isolated failure.