ML20040A185

LER 81-073/03L-0:on 811210,two of Four RCS Hot Leg Temp Indications & Two Wide Range Pressure Indications Found Reading Low.On 811016,low Current Condition Found to Be Causing Low Reading.Subj Instruments Disconnected

ML20040A185
Person / Time
Site:	Cook
Issue date:	01/08/1982
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040A176	List: ML20040A175 ML20040A185
References
LER-81-073-03L, LER-81-73-3L, NUDOCS 8201200487
Download: ML20040A185 (2)

Text

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LICENSEE EVENT REPORT CONTROL EsLOCK- l l l l l l l (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIONI i e

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Oio lo L2] I DURING NORMAL OPERATION, TWO 0F THE FOUR REACTOR COOLANT S(STEM (RCS) H0T LEG TEMPER- l l

o 3 l ATURE INDICATIONS AND THE TWO RCS WIDE RANGE PRESSURE INDICATIONS WERE FOUND TO

) lo g l READING LOW, (ONLY TWO WIDE RANGE TEMPERATURE CHANNELS ARE REQUIRED TO BE OPERABLE l 1 f

}loisl l PER TECHNICAL SPECIFICATION TABLE 3.3-11). THE EVENT WITH THE WIDE RANGE PRESSURE l -

lIFTi~1I INDICATORS WAS NON-CONSERVATIVE WITH RESPECT TO TECHNICAL SPECIFI

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, CAUSE DESCRIPilON AND CORRECTIVE ACTIONS h j i j o j l ON OCTOBER 16, 1981, A PORTION OF THE NEW REACTOR VESSEL LEVEL INDICATION SYSTEM l 3 , l (RVLIS) WAS INSTALLED. DURING INITIAL TESTING OF THE INSTALLATION, A LOW CURRENT l INDICATION LOOP TO BE l

, ;, l CONDITION WAS FOUND TO BE CAUSING THE WIDE RANGE PRESSURE i,j,il READING LOW. THE RVLIS INSTRUMENTS WERE DISCONNECTED AND AN AMENDMENT TO THE RFC l

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ATTACHMENT TO LER# 81-073/03L-0 SUPPLEMENT TO CAUSE DESCRIPTION ON OCTOBER 16, 1981, A PORTION OF RFC-12-2444, REACTOR VESSEL LEVEL INDICATION SYSTEM (RVLIS) WERE INSTALLED WHICH REQUIRED CROSS-TIES INTO THE WIDE RANGE INDICATION SYSTEM. ON DECEMBER 12, 1981, DURING TROUBLESHOOTING AND INITIAL TESTING OF RVLIS IT WAS DISCOVERED THAT A LOW CURRENT CONDITION WAS PRESENT WHICH CAUSED THE WIDE RANGE INDICATORS TO READ LOW. THE RVLIS INSTRUMENTS WERE DISCONNECTED AND THE WIDE RANGE INDICATORS RETURNED TO NORMAL. AN AMENDMENT TO THE RFC WAS INITIATED TO INSTALL CURRENT ISOLATORS BETWEEN RVLIS AND THE AFFECTED INDICATORS.

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