ML20042B976
| ML20042B976 | |
| Person / Time | |
|---|---|
| Issue date: | 03/08/1982 |
| From: | Faulkner H Office of Nuclear Reactor Regulation |
| To: | John Miller Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8203290081 | |
| Download: ML20042B976 (14) | |
Text
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J'CE B.
DETERMINE POSSIBLE PERFORMAtlCE, PROBLEMS C.
USE A & B TO REVI'EW BY PLANT CATEGORY D.
EVALUATE MODIFICATIONS (HARDWARE Af1D PROCEDURES)
WHICH ARE RESPONSIVE 2.
IDENTIFY AND EVALUATE OTHER MEANS FOR WATER LEVEL DETECTION INADEQUATE CORE COOLING DETECTION 3.
REVIEW RESULTS AND FURTHER PLAtlS WITH NRC 4.
M0RE DETAILED EVALUATION AS APPROPRIATE 5..
REVIEW FIllAL RESULTS AND PLANS WITH NRC 8
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'BWR INSTRUMENTATION AND PROCEDURE 5 FOR INADEQUATE CORE CO
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SUMMARY
REPORT)
OUTLINE DESCRIPTION OF BWR INSTRUMENTATION r
FACTORS AFFECTING MEASUREMENT ACCURACY OPERATIONAL PERFORMANCE AND OPERATOR / CONTROL SYSTEMS INFLUENCES ON MEASUREMENT ACCURACY EMERGENCY PROCEDURES TO PREVENT INADEQUATE CORE COOLING AND TO MITIGATE AGAINST INSTRUMENT PROBLEMS EXPERIMENTAL VERIFICATION POSSIBLE INSTRUMENTATION MODIFICATIONS CONCLUSIONS i
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WHAT IS IT TO D0?
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PROVIDE INFORMATION TO LIMIT CORE DAMAGE IN-THE EVENT OF WATER LEVEL SYSTEM AN0 MOLY r
DETECT GLOBAL INADEQUATE CORE COOLING i -
DETECT RETURN OF ADEQUATE CORE COOLING 9
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SUITABLE INDICATION i
i BINARY INDICATION OF:
CORE UNC0VERY
-OR-HIGH CLADDING TEMPERATURE
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NUMEROUS CLADDING FAILURES e
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EVENT SPECTRA RESPONSIVE TO SLOW TRANSIENTS COMBINED WITH WATER LEVEL SYSTEM A!10 MOLY NOT INTENDED FOR LARGE LOSS OF COOLANT ACCIDENT RESPONSE O
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-DEV1CE EVALUATION CONSIDERATIONS o
POSSIBLE AMBIGUITY OF IllDICAT10fl o
TESTABILITY o
INDEPENDENCE FROM WATER LEVEL INDICATION SYSTEM o
PRACTICALITY o ~ RELIABILITY o
FEASIBILITY OF INSTALLATION o
POSSIBLE CONFLICIS WITH WATER LEVEL' INDICATION M
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BASIC DEVICES WATER LEVEL EX:
HEATED JUNCTION TC, RESISTANCE PROBES, FLOAT SWITCHES CORE TEMPERATURE EX:
THERM 0 COUPLES, (PREVIOUSLY DISCUSSED)
RADI0 METERS RTD'S FISSION GAS RELEASE EX:
NAI (TL)
CRYSTAL P
-GE (LI)
CRYSTAL ELECTROMAGNETIC TRANSMIS'SION 5
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