ML20041E748

LER 82-011/03L-0:on 820203,during Performance of Leak Tests Per Dts 1600-1,leakage Rate of 284.84 Scfh Observed on HPCI Turbine Exhaust Check Valve 3-2301-45.Cause Not Determined. Valve Repaired & Vol Retested

ML20041E748
Person / Time
Site:	Dresden
Issue date:	03/02/1982
From:	Anandappa A COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20041E744	List: ML20041E743 ML20041E748
References
LER-82-011-03L, LER-82-11-3L, NUDOCS 8203110306
Download: ML20041E748 (2)

Text

LICENSEE EVENT REPORT

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7 8 60 61 QoCKET NUMEER 68  % EVENT QATg 74 75 REPCRT QATE 30 EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h t o 12 l l While performing local leak rate tests per DTS 1600-1, a leakage rate of 284.84 SCFH was l

,g,,,  ; observed on the HPCI turbine exhaust check valve 3-2301-45. This is in excess of Tech. l

,g,,, g Spec. 4.7.A limit of 29.38 SCFH for single valve leakage. There was no effect on public l

, , , health or safety. This event is of minimal safety significance since the leakage was y only through the valve and not through the entire volume being tested. Last occurrence ,

of this type was reported by R.O. 82-07/03L on Docket 50-249.

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CAUSE CESCRIPTION AND CORRECT 1vE ACTIONS @

liiol l The cause of the event cannot be determined at this time. The check valve will be re-  !

ii;,j l paired and volume retested prior to unit startup. If any other valve leaks above Tech. I

,,,,,g Spec. limits it will be repaired and reported at that time. Testing of the valve will l continue to be performed during each refueling outage.

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DEVIATION REPORT

.I g y) Commonwealth Edison DvR NO. 12 - 3 15 j STA UNIT YEAR NO.

PART 1l T I TL E O F DEVIATION .

OCCURRED Failure of IIPCI Turbine Exhaust Check Valve to Pass LLRT 2- 1p0 SYSTEM AFFECTED PLANT STATUS AT TIME OF EVENT TESTING 2300 HPCI MODE 9 h n e d m rn . PAR (M4T) O . LOAD (MAE) O y g oESCRIPTION OF EVENT While performing DTS-1600-1. Local Leak Rate Testing of Primary Contain-ment Isolation Valves, it was determined that the HPCI turbine exhaust check valve 3-2301-45 was leaking excessively (284.84 SCFH); Tech. Spec. 4.7.A. limit is 29.38 SCFH for single valve leakage.

10 CFRSO.72 NRC RED PHONE b NOTIFICATION MADE YES NO EQUIPMENT FAILURE 913333 OVES O NO *0Rn RE0uFST NO. Resp 0NSiRtE SUPERVISOR Edt,.ard J. Rowley oArt 2-3-82 PART 2 l 0PERATING ENGINEER'S COMMENTS The local leak rate test determined that the leakage is-only through the 3-2301-45, not volume through leakage. The 3-2301-45 valve will be repaired and the volume retested prior to startup from the refueling outage.

EVENT OF PUBL IC I N TE R E ST O 2 4-HOUR NeC NOTI Fi CATI O~ REO.D TELEPH b 0 TECN. SPEC. violation REGION iii DATE TIME C NON REPORTABLE OCCURRENCE TELEGM/TELECOPY O I4 OAY R E PO R T A BL E / T. S . REGION lll DATE TIME Q 30 DAY REPOR TA BLE/ T. S. 6. 6. 3. 2. d CECO CORPORATE No rlFIC ATION MADE ANNUAL /SPECL REPORT RE0'D IF ABOVE NOTIFICATION l$ PER 10CFR21 A.I.R. #

C 5-DAY WRI TTEN REPORT RE0'D PER 10CFR21 L.E.R. 82-ll/03L-0 7gtepg F. A. Palmer 2-8-82 1305 CECO CORPORATE OFFICER DATE TIME PRELIMINARY REPORT COMPLETED AND REVIE4ED Michael Wright 2-5-82 OPERATING ENGrNEER , D A Tf u f ,

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INVESTIGATED REPORT & RESOLUTION ,

ACCEPTED BY STATION REviE4 pen m > . /7 3 3\$ h RESOLUTION APPROVED AND AUTHOR I ZED FOR DI STR I BUTICN

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