ML20083E145

RO 83-112/0:on 831110,smoke Detectors in Zones 1-4 & 1-11 in Alarm Would Not Restart.Caused by Accumulation of Dust Particles on Ionization Detectors.Zones Reset & Restored to Operability

ML20083E145
Person / Time
Site:	Grand Gulf
Issue date:	12/16/1983
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RO-83-112, RO-83-112-0, NUDOCS 8312280473
Download: ML20083E145 (2)

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,s e-E(E MISSISSIPPI POWER & LIGH Helping Build Mississippi P. O. B O X 164 0, J AC K S O N, MIS SIS SIP PI 3 9 2 0 5 g % mbgy (66 $983 NUCLE AR PRODUCTION DEP ARTMENT U. S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Regional Administrator

Dear Mr. O'Reilly:

SUEJECT: Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/L-835.0 Special Report 83-112/0 -

2 Smoke Detectors Alarmed and Would Not Reset AECM-83/0797 On Ncvember 10, 1983, smoke detectors in zones 1-4 and 1-11 were in alarm and would not reset. Fire watches were established in accordance with Technical Specification 3.3.7.9.

Maintenance personnel cleaned the detectors and performed a functional check. The zones were reset and restored to operability on December 12, 1983.

The cause is attributed to the accumulation of dust particles on the ionization detectors.

This is reported as a Special Report pursuant to Technical Specification 6.9.2 since the fourteen (14) day Limiting Condition for Operation (LCO) was exceeded. The event had no effect on the health and safety of the public and did not constitute a threat to plant safety. This is n final report.

Yours truly,

), d $h fp L. F. Dale

/ Manager of Nuclear Services EBS/SHH: sap cc: (See Next Page)

T 8312280473 8.71216 .

PDR S

ADOCK 05000416 PDR fSD Member Middle South Utilities System h

'* AECM-83/0797 MISSISSIPPI POWER O Ll2HT COMPANY cc: Mr. J. B. Richard Mr. R. B. McGehee Mr. T. B. Conner Mr. G. B. Taylor Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Document Control Desk U. S. 'suelesr Regulatory Commission Washington, D. C. 20555 s

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