ML20042B447

LER 82-015/04L-0:on 820222,flow Indicator SFR-201 for Turbine Gland Seal Leakoff Failed Low.Probably Caused by Moisture in Sys.Replacement Probes Found Calibr to Incorrect Range.New Sys to Be Installed

ML20042B447
Person / Time
Site:	Cook
Issue date:	03/19/1982
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20042B442	List: ML20042B441 ML20042B447
References
LER-82-015-04L, LER-82-15-4L, NUDOCS 8203250323
Download: ML20042B447 (2)

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- LICENSEE EVENT REPORT CON OL BLOCK: l l l I l l (PLEASE PRINT OR TYPE ALL CEQUIRED INFORMATION)

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REPORT DAT E 80

1. 8e 60 61 DOCK ET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo 121 l DURING NORMAL OPERATION, THE FLOW INDICATOR (SFR-201) FOR THE TURBINE GLAND SEAL LEAK l F5TT110FF (GSLO) FAILED LOW. THE INSTRUMENTATION WAS DECLARED INOPERARI F AT 07ac; HOURS ON l 1o141IFEBRRUARY 22. 1982. CONTINUOUS FLOW MEASUREMENT IS REOUIRFD RY TFCHNICAI SPFCTFICAI.IDNI, O s l APPENDIX B. 2.4.4.b AND TABLE 2.2.4 PREVIOUS OCCURRENCES INCLUDE 050-316/81-75. I I

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44 47 33 34 36 37 40 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h liioilTHE CAUSE OF THE FLOW INDICATION FAILURE IS UNKNOWN SINCE THE PROBE IS A SEALED UNIT: I li t i l IH0 WEVER, M0ISTURE IN THE SYSTEM IS BELIEVED TO HAVE BEEN A CONTRIBUTING FACTOR. DURTNG l

, , 1 INVESTIGATION OF THE FAILURE IT WAS DISCOVERED THAT THE REPLACEMENT PROBES WERE CALI, f I

I TT1 i BRATED TO AN INCORRECT RANGE. THE CORRECT EQUIPMENT WILL BE INSTALLED UPON RECEIPT.

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/ 8 9 b 69 69 80 3 NAME OF PREPARER ROBERT A. PALMER pgoyg. 616-465-5901

'kTTACHMENT TO LER#82-015/04L-0 SUPPLEMENT TO CAUSE DESCRIPTION THE CAUSE OF THE FLOW INDICATION FAILURE IS UNKNOWN SINCE THE PROBE IS A SEALED UNIT: HOWEVER, M0ISTURE IN THE SYSTEM IS BELIEVED TO HAVE BEEN A CONTRIBUTING FACTOR. PRESENTLY, A DESIGN STUDY IS IN PROGRESS TO REDUCE THE M0ISTURE PROBLEM IN THIS AREA. DURING REPAIR AND INVESTIGATION OF THE PROBE PROBLEM, IT WAS DISCOVERED THAT REPLACEMENT PROBES HAVE BEEN CALIBRATED TO A RANGE OF 0 TO 200 FEET PER SECOND (FPS) BY THE MANUFACTURER (THERM 0-SYSTEM INC.) RATHER THAN IN CUBIC FEET PER MINUTE (CFM). FURTHER INVESTIGATION REVEALED THAT ALL PROBES USED IN THE PAST FOR THE REPAIR OF THE FLOW INDICATOR HAVE APPARENTLY BEEN OF THE SAME FPS CALIBRATION. THE DIFFERENCE BETWEEN THE FPS AND CFM CALIBRATION HAS MADE VARIOUS ELEMENTS OF THE FLOW MEASURING CIRCUIT INCOMPATIBLE. T0 RESOLVE THIS PROBLEM AN INTERIM SYSTEM FOR MEASURING FLOW HAS BEEN INSTALLED AND WILL BE UTILIZED UNTIL A PERMANENT SYSTEM CAN BE PLACED IN OPERATION. THE NEW SYSTEM WILL BE INSTALLED PENDING THE RECEIPT OF EQUIPMENT FROM THE SUPPLIER.

SINCE THE PROBLEM WAS DISCOVERED, A REVIEW 0F RADI0 ACTIVE EFFLUENT REPORTS HAS BEEN PERFORMED. THIS REVIEW INDICATED THAT THE FLOW MEASUREMENT WAS NOT REQUIRED FOR QUANTIFICATION OF ANY RELEASE AND THEREFORE DOES NOT AFFECT ANY ROUTINE REPORTING.