05000395/LER-1982-004, Forwards LER 82-004/03L-0.Detailed Event Analysis Encl

From kanterella
Jump to navigation Jump to search
Forwards LER 82-004/03L-0.Detailed Event Analysis Encl
ML20065P181
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 10/15/1982
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20065P183 List:
References
NUDOCS 8210220438
Download: ML20065P181 (4)


LER-2082-004, Forwards LER 82-004/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3952082004R00 - NRC Website

text

.

SOUTH CAROLINA ELECTRIC & GAS COMPANY post oprice 7s4 COLuusiA. SOUTH CAROUNA 29218 O. W. Otxon, Jn.

vice Pnestormt uvet .. o ...tions October 15, 1982 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 St 'lon ..

Docket No. 50/395 N ._

Operating License No. NPF-12 g ..d Thirty Day Written Report s z ;D

-4 0 LER 82-004 -

  • :* n p

Dear Mr. O'Reilly:

- p,[-

Please find attached Licensee Event Report #82-004 for vi'rgil' '

This Thirty Day Report is c:s C. Summer Nuclear Station. '

required by Technical Specification 6.9.1.13(b) as a resuR of entry into Action Statement (b) of Technical Specification - 3.4.1.4, " Reactor Coolant System - Cold Shutdown - Loops Filled" on September 15, 1982.

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

Very truly yours, a ,

O. W. xon/ J ARK:OWD:dwf Attachment cc: See Page Two OFFICIALCDP9f-I 8210220438 821015 PDR ADOCK 05000395 Y-

  1. [

S PDR

Mr. James P. O'Reilly LER 82-004 Page Two October 15, 1982 cc: V.C. Summer T.C. Nichols, Jr.

G.H. Fischer O.W. Dixon, Jr.

H.N. Cyrus H.T. Babb D.A. Nauman M.B. Whitaker, Jr.

W.A. Williams, Jr.

O.S. Bradham R.B. Clary M.N. Browne A.R. Koon H. Radin Site QA C.L. Ligon (NSRC)

G.J. Braddick J.L. Skolds J.B. Knotts, Jr.

B.A. Bursey I&E (Washington)

Document Management Branch NPCF File k

Mr. James P. O'Reilly LER No.82-004 Page Three October 15, 1982 DETAILED DESCRIPTION OF EVENT On September 15, 1982, with the plant operating in Mode 5, maintenance personnel attempted to perform Surveillance Test Procedure STP-340.008, "PORV Analog Channel Operational Test (Cold Overpressurization Protection P-402 and P-403)". This

est simulates high RCS pressure which closes RHR Train A and E header suction isolation valves to protect the low pressure RHR piping from overpressurization. Both trains of RHR suction consist of two isolation valves in series (all normally closed). Pressure transmitter P-402 and P-403 each feed one isolation valve in each train. In performing the STP on P-402, with Train "B" RHR in service, isolation valve 8702B shut when the test signal was generated.- The operator immediately tripped the "B" RHR pump and maintenance cleared the test signal. The suction isolation valve was then reopened, and the associated RHR pump was restarted. The incident lasted approximately one minute.

PROBABLE CONSEQUENCES There were no adverse consequences resulting from the occurrence since the RHR pumps are equipped with a minimum flow recirculation line. Also, the situation was corrected within one minute.

CAUSE(S) OF OCCURRENCE This occurrence is attributed to the STP being incorrect in that it did not adequately address the closure of the pressure transmitter's associated isolation valves.

Therefore, operations personnel did not expect inadvertent valve closure.

Mr. James P. O'Reilly LER No.82-004 Page Four October 15, 1982 IMMEDIATE CORRECTIVE ACTION TAKEN The operator took prompt action to trip the "B" RHR pump and requested the maintenance personnel to exit the test. The RHR suction isolation valve, 8702B, was then reopened and the "B" RHR pump restarted.

ACTION TAKEN TO PREVENT _ RECURRENCE STP-340.008 is being rev12 d to require the suction isolation valve in the Operating RHR Train to be de-energized when the associated pressure transmitter is being tested. This precludes future occurrences of this nature. This action will be complete by October 31, 1982.