05000315/LER-1982-003, Corrected LER 82-003/04T-1:on 820115,unplanned Gas Release Detected by Elevated Vent Stack Monitor Reading.Exact Cause Undetermined.Helium Leak Testing of Waste Gas Sys Probable Cause.Test Procedure Changed

Corrected LER 82-003/04T-1:on 820115,unplanned Gas Release Detected by Elevated Vent Stack Monitor Reading.Exact Cause Undetermined.Helium Leak Testing of Waste Gas Sys Probable Cause.Test Procedure Changed

ML20133C836
Person / Time
Site:	Cook
Issue date:	05/03/1985
From:	Paris J, Will Smith INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-82-003-04T, LER-82-3-4T, NUDOCS 8507220008
Download: ML20133C836 (3)

LER-2082-003, Corrected LER 82-003/04T-1:on 820115,unplanned Gas Release Detected by Elevated Vent Stack Monitor Reading.Exact Cause Undetermined.Helium Leak Testing of Waste Gas Sys Probable Cause.Test Procedure Changed

Event date:
Report date:
3152082003R00 - NRC Website

text

N - tMEUIOUS REPORT LICENSEE EVENT REPORT / 5/82 CoaTRotstcCie1 i l I 1 1 l@ (PLEASE PQiNT OR TYPE ALL REQUIRED INFORMATIONI QlM e e II ID ICccoe ucaNsec IC 11 l@l i. a 0101 -l 010101010a l-a 1010 uceNsa w n ed uctwe Tv t a I@l 4I$i1111111 6-1 24l@

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e9 Ja tw&NT CATE i% REPORT DATE e9 EVENT'OESCRIPTION AND PRC9 ABLE CONSEQUENCE 1 io ,,,l ON JANUARY 15,1982, AT 1300 HOURS,0'o AN UNPLANNED GAS RELEASE WAS DETECTED BY AN l

, ELEVATED UNIT-1 VENT STACK GASE0US MONITOR (R-26) READING.

THE EVENT CONTINUED UNTIL I g ,,,j ,1500 HOURS. DURING THIS TIME PERIOD, A TOTAL OF 3.L5 CI SERE RELEASED AT 'A RAT I g ,,y , 4.05 E-4 CI/SEC. WHICH IS 0.68% OF TECHNICAL SPECIFICATION.

THE MAXIMUM RELEASE RATE Ii i o ,6 ,  ; WAS 1.66 E-3 CI/SEC WHICH IS 2.80% OF TECHNICAL SPECIFICATION. ,, y<

THIS RELEASE OCCtlRRED Ii

o ,,; i WITHOUT.THE SAMPLING AND ANALYTICAL REQUIREMENTS OF TECHNICAL SPECIFIC l

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i , ,1 THAT THE RELEASE WAS THE RESULT OF ONE OF THE PHASES OF i

, , , , , i THE WA5TE GAS SYSTEM.

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SUPPLEMENT TO CAUSE DESCRIPTION AND CORRECTIVE ACTIONS PAGE 2 '

l THE EXACT CAUSE OF THE UNPLANNED GAS -RELEASE COULD NOT BE DETERMINED.IT IS BELIEVED THAT THE RELEASE WAS THE RESULT OF ONE OF THE PHASES OF THE HELIUM ,

LEAK TESTING 0F THE WASTE GAS SYSTEM. LEAK TESTING 0F THE UNIT I VOLUME CONTROL l TANK (VCT) WAS BEGUN AT 1200 ON JANUARY 15, 1982. THE VCT WAS LINED UP TO THE l NUCLEAR SAMPLING SYSTEM THROUGH VALVE NS-187. ABOUT THE SAME TIME THE VALVE LINEUP FOR THE UNIT 2 VCT WAS BEGUN.

TESTING WAS STOPPED WHEN THE VENT STACK MONITORRALA' MED. LATER IN THE DAY BOTH VCTs WERE TESTED AND NO LEAKS WERE FOUND.

ACTIONS TO PREVENT RECURRENCE:

1. THE PROCEDURE FOR THE HELIUM GAS TEST WAS CHANGED TO ALLOW ONLY ONE PORTION OF THF WASTE GAS SYSTEM TO BE TESTED AT A TIME. ,

2. NUCLEAR SAMPLING SAFETY VALVES (SV-38) HAVE BEEN FOUND TO CAUSE PROBLEM c LEAKS AND HAVE BEEN REPLACED.

SINCE THE UNPLANNED UNIDENTIFIED GAS RELEASE OF JANUARY 15, 1982, NO FURTHER UNIDENTIFIED GAS RELEASES HAVE OCCURRED. THE HEALTH AND SAFETY OF THE PUBLIC WERE NOT AFFECTED.

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,,,,,, INDIANA &. MICHIGAN ELECTRIC COMPANY DONALD C. COOK NUCLEAR PLANT

=i P.O. Box 468, Bridgman, Michigan 49106 (616) 465-5901 .,

May 3, 1985

, Mr. J.G. Keppler, Regional Administrator United States Nuclear Regulatory Commission Region III 799 Roosevelt Road 1 Glen Ellyn, IL 60137 Operating License DPIt-58 Docket No. 50-315

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Dear Mr. Keppler:

Pursuant to the requirements of the Appendix B. Technical :rt 4

Specifications, the following report /s are submitted:

RO 82-003/04T-1 Sincerely, g ,{ M ) w u l l W.G. mith D /.

Plant Manager

/cbm Attachment cc: John E. Dolan l

Document Control Manager M.P. Alexich R.F. Kroeger H.B. Brugger R.W. Jurgensen NRC Resident Inspector l R.C 'len, MPSC G.( ff, Esq.

J.M. . nigan INPO PNSRC A.A. Blind J.F. Stietzel Dottie Sherman, ANI Library l ,

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