ML20236N403
Text
O 10 M e s Szptember 15. 1997 MEMORANDUM TO:
Alexander W. Dromerick, Acting Director Project Directorate 1-1 Division of Reactor Projects 1/11 FROM:
Jared Warmiel, Chief instrumentation and Controls Branch
)
Division of Reactor Controls J
and Human Factors
SUBJECT:
R. E. GINNA NUCLEAR POWER PLANT, REVIEW OF THE TIA FROM REGION 1 FOR OPERABILITY ASSESSMENT OF AN INTERMEDIATE RANGE NEUTRON MONITORING (IRM)
INSTRUMENT WHILE THE INSTRUMENT WAS UNDERCOMPENSATED FOR PROPER DETECTOR VOLTAGE (TAC NO. M99364)
As requested in the TIA from Region I, attached is the Instrumentation and Controls Branch evaluation for operability assessment of the IRM instruments at R.E. Ginna Nuclear Plant. These instruments were undercompensated for proper detector voltage to nullify the effects of gamma radiation. Our review concluded that although the P-6 permissive ir.terlock function of the undercompensated instrument was in a degraded condition, but I
appropriate Technical Specifications requirements were met. The staff believes that although restarting the plant without calibrating undercompensated IRM channel was not a desirable action, the effect of the undercompensated IRM channel on the plant's safety was not significant and did not violate the plants licensing basis.
Attachment:
As stated DISTRIBUTION:
Central File HlCB R/F (2)
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0FFICIAL RECORD COPY 9807150118 900624 PDR FOIA UNNERST98-155 PDR
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3 licensee and encourage the licensee to establish procedural controls requiring maintenance of SCI during similar activities in the future.
Based upon the above conclusions. NRR considers TIA No.97-006 to be closed.
Docket Nos. 50-SES-andSh l
)lSTRIB X ON bcket F1 e
B. Boger J. Zwolinski i
M. Shymlock D. Trimble C. Patterson T. Liu 4
FILENAME - G:\\BRUNSWIC\\BR199043.TIA *See previous concurrence Nts "A errrer anieori.i.
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