ML20082H125

Special Rept:On 910716,wide-range Noble Gas Monitor Taken Out of Svc for Primary Calibr for More than 7 Days.Monitor Will Be Returned to Svc When Required Parts Delivered. Primary Calibr Scheduled to Be Completed by 910830

ML20082H125
Person / Time
Site:	Calvert Cliffs
Issue date:	08/14/1991
From:	Denton R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9108230100
Download: ML20082H125 (2)

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B ALTIMORE GAS AND ,

ELECTRIC CHARLES CENTER e P.O. BOX 1475 e t3ALTIMORE 'AARYLAND 21203 1475 GtoRot C. CRttL v.ca e ti m o August 14,1991 Nuctg am rNtoov iso.) see 4 4ss U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant

' Unit Nos.1 & 2: Docket Nos.30-317 & 50-318 Radiation hionitoring Instrumentation Special Report .,

Technical Soccification 3.3.3.1 ACTION Statement b Gentlemen:

Per the requirements of, Technical Specification 3.3.3.1 ACTION Statement b, we hereby submit the attached Special Report concerning a Wide Range Noble Gas hionitor being inoperable for greater than 7 days.

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Should you have any further questions reaarding this matter, we will be pleased to discuss them 'vith you.

Very truly yours, Ir RED /JV/bjd Attachment cc: D. A. Brune, Esquire J. E. Silberg, Esquire R. A. Capra, NRC D. G. hicDonald, Jr., NRC T. T. hiartin, NRC L E. Nicholson, NRC R. I. hicLean, DNR J. H. Walter, PSC 0

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N1'l'ACilM ENT (1)

UNIl' 2 WIDE IIANGE NOllLE G AS MONITOlt SPECIAld(EPORT On July 16, IWI, the Unit 2 Wide Range Noble Gas hionitor (WRNGM) was taken out of service ,

for primary calibration. Technical Specification 3.3.3.1 ACTION Statement b, Table 3.3-6, Action i 30, was entered. An alternate method of monitoring appropriate paramet'; s was initiated within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. This evolution was planned for 10-14 days because of the time required for the primary calibration procedure, fiased on the results of the primary calibration,it was determined that the low range detector required corrective maintenance. The WRNOM will be returned to service when the required parts, which have been ordered, are received and rebuilding is complete. Primary recalibration is scheduled to be completed approximately August 30, lW1.

Technical Specification 3.3.3.1 ACFION Statement b, Table 3.3-6, Action 30-2 states that if the WRNGM is not restored to OPERABLE status within 7 days, a Special Report pursuant to Technical Specification 6.9.2 must be prepared and submitted to the Commission outlining the actions taken, the cause of the inoperability, and the plans and schedule for restoring the system to OPERABLE status, This Special Report fulfills these requirements.

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