05000316/LER-1981-034-04, /04T-0:on 810715,detector Was Found to Be Inoperable During Testing on Regulatory Manual Sys Channel R-19.Cause Not Stated.Procedures Changed to Require Source Check to Verify Operability

/04T-0:on 810715,detector Was Found to Be Inoperable During Testing on Regulatory Manual Sys Channel R-19.Cause Not Stated.Procedures Changed to Require Source Check to Verify Operability

ML20010C866
Person / Time
Site:	Cook
Issue date:	08/14/1981
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20010C865	List: 05000316/LER-1981-034-04, /04T-0:on 810715,detector Was Found to Be Inoperable During Testing on Regulatory Manual Sys Channel R-19.Cause Not Stated.Procedures Changed to Require Source Check to Verify Operability
References
LER-81-034-04T, LER-81-34-4T, NUDOCS 8108210121
Download: ML20010C866 (2)

LER-1981-034, /04T-0:on 810715,detector Was Found to Be Inoperable During Testing on Regulatory Manual Sys Channel R-19.Cause Not Stated.Procedures Changed to Require Source Check to Verify Operability

Event date:
Report date:
3161981034R04 - NRC Website

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60 61 COcKET NLM8 ER 58 69 EVENT QATE 74 75 REPORT DATE 30 EVENT OESCRIPTION AND PROBABLE CONSECUENCES j,121lDURINGASURVEILLANCETESTONRMSCHAf L R-19 (S.G. BLOWDOWN), THE DETECTOR WAS FOUND T0 i y ;BE INOPERABLE. THE DETECTOR FAILED SOMETIME BETWEEN 06-17-81 AND 07-15-81. DURING THIS

,,,, l TIFiE PERIOD THE 5.G. BLOWDOWN FLASH TANK WAS IN SERVICE TWICE. WITH THIS UNIT EXPERIENC-l l,,,,i ING A St:ALL PRIl1ARY-T0-SECONDARY LEAK, THE Rf1S OPERABILITY REQUIREMENTS OF APPENDIX-B T.S. l

,,, i ; 2.4.2.g. WAS NOT MET IF THE R-19 DETECTOR WAS IN0PERABLE DURING THE tit 1ES WHEN THE S.G.

j,,,,; BLOWDOWN WAS ROUTED TO THE FLASH TANK.

THIS EVENT WAS DETERMINED TO BE REPORTABLE ON l

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3J 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACT1CNS h I

,Iol I NVESTIGATION COULD NOT REVEAL WHEN THIS DETECTOR ACTUALLY FAILED. A REVIEW 0F APPLICABLE l

,,,i RECORDER CHARTS INDICATED THAT THERE WAS METER FLUCTUATION UP U!TIL THE TIf1E R-19 WAS I

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,,,; FUNCTIONALLY TESTED ON 07-15-81. AT WHICH TIME THE INSTRUMENT (MANUFACTURED BY HARSHAW i

j,,,; CHEMICAL C0., MODEL N0. 654) FAILED TO RESPOND TO A KNOWN RADIATION SOURCE.

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,g i WERE MADE TO QUANTIFY THE RELEASES MADE FRG1 THE STEAM GENERATOR (SEE ATTACHED SUPPLEMENT)l

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ATTACHMENT TO LER#81-034/04T-0 SUPPLEMENT TO CAUSE DESCRIPTION 1

b BLOWDOWN FLASH TANK. TH-sE CALCULATIONS WERE BASED ON RECORDED BLOWDOWN ATTES FOR 07-13-81 AND ESTIMATED MAXIMUM 6 LOWDOWN RATES FOR 07-11-81, DUE TC THL '.0SS OF THE RECORDER CHART PAPER FOR BLOWD0WN VALVE POSITION.

I RELEASE CALCULATIONS DATE ISOTOPE RELEASED AMOUNT 07-11-81 I-131 4.16 E-2 Durries H-3 2.697E-3 Curries Xe-133 2.70 E-3 Curries Cs 134 1.23 E-3 Curries Cs 136 6.87 E-4 Curries Cs 137 2.31 E-3 Curries 07-13-81 1-1 31 2.42 E-4 Curries H-3 2.58 E-4 Curries THESE FIGURES CORRESPOND TO THE FOLLOWING PERCENT TECHNICAL SPECIFICATION RELEASES:

ISOTOPE AVERAGE MAXIMUM AVERAGE MAXIMUM I-131 9.129E-1%

1.805E0%

1.017E0%

1.998E0%

Xe-133 N.A.

N.A.

1.454L-5%

1.454E-5%

H-3 5.371E-4%

1.052E-4%

1.926E-1%

3.809E-l%

Cs 134, 136, 137 3.429-E-3% 3.429E-3%

2.034E-1%

2.034#-1%

THE ACTIVITY IN THE SECONDARY SYSTEM nID NOT SHOW ANY SIGNIFICANT CHANGE DURING THE INTERVAL, WHEN R-19 MAY HAVE BEEN IN0PERABLE, AS MONITORED BY PRIMARY-T0-SECONDARY CHEMISTRY LEAK SURVEILLANCES.

TO PREVENT RE0CCURRENCE, OPERATIONS PROCEDURES HAVE BEEN CHANGED RE-QUIRING R-19 TO BE SOURCE CHECKED, TO VERIFY OPERABILITY, PRIOR TO PLAC-ING THE STEAM GENERATOR BLOWDOWN FLASH TANK IN SERVICE.

THIS REPORT IS BEING SUBMITTED AS THE OPERABILITY OF R-19 COULD NOT BE PROVEN DURING THE TIMES THE STARTUP FLASH TANK WAS IN 3ERVICE.