05000316/LER-1981-034, Updated LER 81-034/04X-0:between 810617 & 810715,detector on RMS Channel R-19 Failed & Steam Generator Blowdown Flash Tank Experienced Small primary-to-secondary Leak.Caused by Failure of Meter,Model 654.Procedures Revised

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Updated LER 81-034/04X-0:between 810617 & 810715,detector on RMS Channel R-19 Failed & Steam Generator Blowdown Flash Tank Experienced Small primary-to-secondary Leak.Caused by Failure of Meter,Model 654.Procedures Revised
ML20010E259
Person / Time
Site: Cook 
Issue date: 08/25/1981
From: Rischling J
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20010E254 List:
References
LER-81-034-04X, LER-81-34-4X, NUDOCS 8109030248
Download: ML20010E259 (3)
v • d • e


LER-1981-034, Updated LER 81-034/04X-0:between 810617 & 810715,detector on RMS Channel R-19 Failed & Steam Generator Blowdown Flash Tank Experienced Small primary-to-secondary Leak.Caused by Failure of Meter,Model 654.Procedures Revised
Event date:
Report date:
3161981034R00 - NRC Website
v • d • e

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8 60 61 DOC AET NUYBER 68 69 EVENT DATE 14 15 HEPORT DATE 80 EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES O'o l0 ll l DURING A SURVEILLANCE TEST ON RMS CHANNEL R-19 (S.G BLOWDOWN), THE DETECTOR WAS FOUNDj

o,, TO BE INOPERABLE.THE DETECTOR FAILED SOMETIME BETWEEN 06-17-81 AND 07-15-81. DURING l

THIS TIME PERIOD THE S.G. BLOWDOWN FLASH TANK WAS IN SERVICE TWICE. WITH THIS UNIT l

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EXPERIENCING A SMALL PRIMARY-TO-SECONDARY LEAK, THE RMS. OPERABILITY REQUIREMENTS OF l

,o,s, i o,3 i ; APPENDIX-B T.S. 2.4.2.g. WAS NOT MET IF THE R-19 DETECTOR WAS IN0PERABLE DURING THE l

ol,; ; TIMES WHEN THE S.G. BLOWDOWN WAS ROUTED TO THE FLASH TANK. THIS EVENT WAS DETERMINED l TO BE REPORTABLE ON 08-10-81.

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JJ J4 JS 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h liloll INVESTIGATION COULD NOT REVEAL WHEN THIS DETECTOR ACTUALLY FAILED. A REVIEW 0F APPLIC-I giJi,lABLE RECORDER CHARTS INDICATED THAT THERE WAS McTER FLUCTUATION UP UNTIL THE TIME R-19l WAS FUNCTIONALLY TESTED ON 07-15-81. AT WHICH TIME THE INSTRUMENT (MFG. BY HARSHAW l

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g,i,; l CHEMICAL CO., MODEL #6S4) FAILED TO RESPOND TO A KNOWN RADIATION SOURCE.

CALCULATIONS l g i i.,; ; WERE MADE T0 QUANTIFY THE RELEASES MADE FROM THE STEAM GENERATOR (SEE SUPPLEMENT)

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COTTE NT ACTiviiv AELE ASED OF HE LE ASE AYOUNT OF ACTIVITY LOCATION OF RELE ASE liInl lM l @ l Ml @ lSEE CAUSE DESCRIPTION l

l S.G. BLOWN FLASH TANK TO ATMOSPHERE l

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8109030248 810825 J* L' RISCHLING NOM PDR ADOCK 05000316 Anen pnONe:

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i ATTACHMENT TO LER # 81-034/04T-0 SUPPLEMENT TO CAUSE DESCRIPTION BLOWD0Wil FLASH TANK.

THESE CALCULATI0'IS MERE BASED Of1 RECORDED BLOWDOWN RATES FOR 07-13-81 AND ESTIMATED MAXIMUit BLOWDOWN RATES FOR 07-11-81, DUE

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TO THE LOSS OF THE RECORDER Ci: ART PAPER FOR BLOWDOWN VALVE POSITION.

RELEASE CALCULATIONS DATE IS0 TOP _E_

RELEASED AMOUNT 07-11-81 1-131 4.16 E-2 Curries H-3 2.697 E-3 Curries Xe-133 2.70 E-3 Curries 1

Cs 134 1.23 E-3 Curries Cs 136 6.87 E-4 Curries Cs 137 2.31 E-3 Curries 07-13-81 1-131 2.42 E-4 Curries H-3 2.58 E-4 Curries THESE FIGURES CORRESPOND TO THE FOLLOWING PERCENT TECHN' CAL SPECIFICATION RELEASES:

07-13-81 07-11-81 fAXI!1UM ISOTOPE AVERAGE MAXIMUM AVERAGE j

.i I-131 9.129E-1%

1.805E0%

1.017E0%

1.998E0%

An-133 N.A.

N.A.

1.454E-5%

1.454E-5%

H-3 5.371E-4%

1.052E-4%

1.926E-l%

3.809E-1%

Cs 134, 136 &

3.429E-3%

3.429E-3%

2.034E-l%

2.034E-l%

137 THE ACTIVITY IN THE SECONDARY SYSTEl1 DID NOT SHOW ANY SIGNIFICANT CHANGE DURING THE INTERVAL, WHEN R-19 f1AY HAVE BEEN IN0PERABLE, AS MONITORED BY PRIMARY-TO-SECONDARY CHEMISTRY LEAK SURVEILLANCES.

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e TO PREVENT RE0CCURRENCE, OPERATIONS PROCEDURES HAVE BEEN CHANGED RE-QUIRING R-19 TO BE SOURCE CHECKED, TO VERIFY OPERABILITY, PRIOR TO PLAC-ING THE STEAf1 GENERATOR BLOWDOWN FLASH TANK IN SERVICE.

THIS REPORT IS BEING SU",MITTFn AS THE OPERABILITY OF R-19 COULD NOT BE PROVEN DURING THE TIMES THE STARTUP FLASH TANK WAS IN SERVICE.

THIS REVISED LER ADDS THE DATES TO THE AB0VE TABLE WHICH LISTS THE PERCENTAGE OF THE T.S. VALUES INCURRED DURING THE RELEASE PERIODS.

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