ML18022A601

Special Rept:On 871212,waste Processing Bldg Vent Stack 5 Wide Range Gas Monitor Declared Inoperable in Excess of 7 Days.Caused by Defective photo-multiplier Tube on Low Range Channel.Tube Replaced

ML18022A601
Person / Time
Site:	Harris
Issue date:	01/04/1988
From:	Watson R CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
HO-880001-(O), NUDOCS 8801130341
Download: ML18022A601 (4)

Text

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AC CELKRATED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8801130341 DOC DATE: 88/01/04

~ NOTARIZED-'O DOCKET FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina 05000400 AUTH. NAME AUTHOR AFFILIATION WATSON,R.A. Carolina Power & Light Co.

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

SUBJECT:

Special rept:on 871212,waste processing bldg vent stack 5 wide range gas monitor declared inoperable.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL 3 SIZE-TITLE: .50.73 Licensee Event Report (LER), Incident Rpt, etc. I NOTES:Application for permit renewal filed. 0500040+

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME PD2-1 LA BUCKLEY,B LTTR ENCL 1

1 1

1 ID CODE/NAME PD2-1 PD LTTR ENCL 1 1 j A

INTERNAL: ACRS MICHELSON 1 1 ACRS MOELLER 2 2 AEOD/DOA 1 1 AEOD/DSP/NAS 1 1 AEOD/DSP/ROAB 2 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB 1 1 DEDRO 1 1 NRR/DEST/ADS 1 0 NRR/DEST/CEB 1 1 NRR/DEST/ELB 1 1 NRR/DEST/ICSB 1 1 NRR/DEST/MEB 1 1 NRR/DEST/MTB 1 1 NRR/DEST/PS B 1 1 NRR/DEST/RS B 1 1 NRR/DEST/SGB 1 1 NRR/DLPQ/HFB 1 1 NRR/DLPQ/QAB 1 1 NRR/DOEA/EAB 1 1 NRR/DREP/RAB 1 1 NRR/DREP/RPB 2 2 N ~SIB 1 1 NRR/PMAS/I LRB 1 1 REG FIL~ 02 TELFORD,J 1 1 RES DEPY IB GI 1 1 RES 1 1 RES/DE/E 1 1 RGN2 FILE 01 1 1 EXTERNAL: EG&G GROH,M 5 5 FORD BLDG HOY,A 1 1 H ST LOBBY WARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC HARRIS,J 1 1 NSIC MAYS,G 1 1 S

1' TOTAL NUMBER OF COPIES REQUIRED: LTTR 46 ENCL 45

Carolina Power & Light Company

." HARRIS NUCLEAR PROJECT P. 0. Box 16S 5 Nmr! Hill, North Carolina 27S62 Ji 4 l988 File'Number--. SHF/29 13510C Letter"Xumbe2:: H~0001 (0) 7 United %?ates: Nuclmm Regulatory Commission Att~on: 3)ocumemt;>Control Desk Washington, 3)C 2D555 HARRXS MJCIZRR PRQZKT UNIT 1 DOCKET'WO.59-400 LICENSE'.MO -%PP-.63 NRC 34-ICILY ZPZCIAL-3EPORT Gent2mnan'.

In accordaace ~itb 'Technical Specifications 3.3.3.6 and 6.9.2 for the Shaaron;-'Harris,";Nuclear Power Plant, Unit No. 1, Carolina Power.X-.I.ight ,Cottqamy hereby submits this Special Report. This Special Repaxt:cazmarns operability of a radiation monitor.

Very truly yours, R. A. Watson Vice President Harris Nuclear Project JRJ adam Enclosure cc: I3r .U -3% .Cxtaaa! (NRC-RII)

-B 33uckley 4NRR)

.G fhucsral1 '4NRC-SHNPP) 8801130341 880k 04 ." iOS1!

PDR ADOCK 05000400 S DCD

'QCCIDENT RADIATION MONITOR SPECIAL REPORT

~Back round:

The"Waste Pzocessing Building Vent Stack 5 wide range gas monitor (WRGM) ARM-3.WV-3546 1 was declared inoperable under Technical Specification 3.3 3 11, Radioactive Gaseous Effluent Monitoring Instrumentation, an5 Technical Specification 3.3.3.6, Accident Monitoring ZastrumerRation, on December 12, 1987, at 1729. This was due to <<epeatad spiking into a high alarm that could not be attributed Xo actual. radioactivity in the process flow going up ver: stack 3 Efforts to ~turn hava been

'e

~successful.

monitor to operable status within 7 days Therefore, this special report is submitted pursuant:tu Technical Specification 3.3.3.6, Action C.

Descxi tion'af Event.-.

On december 62~ 1987, the Waste Processing Building vent stack 5 WRGH began 'apiking::into the high alarm. Portable grab sampling of the - stack ".:;proctess flow revealed no evidence of high radioactiv~ .'haanonitor was declared inoperable at 1729 and a

~Je request.smitten to test and repair the monitor.

Xba " compensatory:."actions required by Technical Specifications 3 3"'3.11, Table 3 ~3,3, Actions 46, 49, and 52 were taken. Since tba " particxilat:e-ieihne"gas (PIG) monitor ARM-lWV-3546, which samples stack ',3 in: parallel with the WRGM, was still operational, tha garticu1ata anxl 3.odine pre filters for the WRGM were switched to '%he PIG '.

~e'.MG monitor then provided the primary sampling far .noble gas-:".whelm the WRGM was inoperable. All compensatory nmrsures for'sgasenus effluent and accident monitoring for stack 5 wane. satisHad Cense:

Mai'ntenance~na< the monitor revealed a defective photo-multiplier (P 'K.) tube',on".the 1ow range channel. This tube was replaced and

~f the problem ,>was ,corrected.

monitor to be The low range channel ac to~ye ca19%ra ted in accordance wi th MST-I0375, and the

~"'. may returned to service was on December 2B~!'-1987 Before the system could be declared operational ~>the high range channel failed. Another work request was .issued .~by.'perat:ions personnel to test and repair the high range channe1.'his work was begun on December 30, 1987, but has not ".been completed. To date, maintenance personnel have not yet bean able to.determine the problem with the high range channel.

MEM/HO-8800010/2/Osl;

a Corrective Actions.

The corrective actions taken to restore the monitor to operable status were Xo replace the photo-multiplier tube in the low range channel and to recalibrate the monitor. This was completed on

. December 28~ 1987. Work is still in progress to determine the

'='ause of the additional failure of the high range channel. An

c estimated campletion date for this work is not available at this

-== time. The results of the subsequent repair work will be submitted a as a supplement to this report.

. '4 MEM/HO-8800010/3/OS1