ML18009A939

Special Rept:On 910528,stack 5 Exhaust Sys Radiation Monitor Declared Inoperable When Monitor Removed from Svc to Perform Test Procedure.Caused by Failed Capacitor.Capacitor Replaced

ML18009A939
Person / Time
Site:	Harris
Issue date:	06/14/1991
From:	Richey R CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
HO-910080-(O), NUDOCS 9106200177
Download: ML18009A939 (5)

Text

ACCELERATED DIS UTION DEMON ION SYSTEM ii I REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9106200177 DOC.DATE: 91/06/14 NOTARIZED: NO DOCKET FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina 05000400 AUTH.NAME AUTHOR AFFILIATION RICHEY,R.B.

Carolina Power

& Light Co.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)-

SUBJECT:

Special rept:on 910528,WPB Stack 5 Exhaust Sys Radiation Monitor declared inoperable when monitor removed from svc to perform test procedure.

DISTRIBUTION CODE:

IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.

NOTES:Application for permit renewal file'd.

05000400 RECIPIENT ID CODE/NAME PD2-1 LA MOZAFARI,B.

INTERNAL: ACNW AEOD/DOA AEOD/ROAB/DSP NRR/DET/EMEB 7E NRR/DLPQ/LPEB10 NRR/DREP/PRPB11 NRR/DST/SICB8H3 NRR/DST/SRXB 8E RES/DSIR/EIB EXTERNAL': EGGG BRYCE,J.H NRC PDR NSIC POOREiW COPIES LTTR ENCL 1

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NOTE TO ALL"RIDS" RECIPIENTS:

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PLEASE HELP VS TO REDUCE WASIH CONTACfTHE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAMEFROM DISEIBUTION LISTS FOR DOCUMENTS YOU DON'T NEEDI TOTAL NUMBER OF COPIES REQUIRED:

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CPKL Carolina Power & Lighl Company 0

HARRIS NUCLEAR PROJECT P.O.

Box 165 New Hill, North Carolina 27562 JUN 1

4 1991 Letter Number:

HO-910080 (0)

United States Nuclear Regulato'ry Commission ATTN:

Document Control Desk Washington, DC 20555 HARRIS NUCLEAR PROJECT UNIT 1 DOCKET NO. 50-400, LICENSE NO. NPP-63 NRC 14-DAY SPECIAL REPORT In accordance with Technical Specification 3.3.3.6 and 6.9.2 for the Shearon Harris Nuclear power Plant, Unit No. 1, Carolina Power

& Light Company hereby submits this Special Report.

This Special Report concerns the operability of a radiation monitor.

Very truly yours, R. B. Richey Vice President'arris Nuclear Project MRH:dmw Enclosure cc:

Mr. S.

D. Ebneter (NRC-RII)

Ms. B. L. Mozafari (NRR)

Mr. J.

E. Tedrow (NRC SHNPP)

MEM/HO-9100800/1/OS1 9106200177 910614 PDR ADGCK 05000400 S

PDR

k

ACCIDENT RADIATION MONITOR SPECIAL REPORT Descri tion of Event On May 28,

1991, at 16:37, the Waste Processing Building (WPB)

Stack 5

Exhaust System Radiation

Monitor, RM-*1WV-3546-1, was declared inoperable when the monitor was removed from service to perform test procedure MST-I0375, WPB Stack 5 Accident Monitor RM->1WV-3546-1 Channel Calibration.

A failure identified during performance of this test procedure resulted in the monitor not being returned to service within 7

days.

This monitor is identified in Technical Specification Table 3-3.10 as Item 24(a).

The compensatory actions required by Technical Specifications to allow continued effluent releases are'(1) noble gas grab sampling every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and (2) continuous particulate and iodine sampling with auxiliary sampling equipment.

These compensatory actions were performed while the monitor was inoperable.

The monitor was out of service for greater than 7

days; thus a

Special Report is required to be submitted per the Technical-Specifications.

Cause/Corrective Action On May 28, 1991, radiation monitor RM-*1WV-3546-1 was taken out of service to perform MST-I0375.

During performance of this surveillance

test, a

failed remote grab sample timer was identified."

The timer failure was due to failed capacitor which is now obsolete.

An alternate capacitor was identified and evaluated by the CP&L Nuclear Engineering Department as an acceptable replacement.

The failed capacitor is currently being replaced to correct the timer problem.

Following completion of

repairs, RM-"-1MV-3546-1 will be tested per MST-I0375 prior to declaring it operable.

This radiation monitor should be operable by June 21,

1991, in the meantime compensatory actions will be continued.

MEM/HO-9100800/2/OS1

0