ML20236L436

Special Rept:On 870718,fire Detection Zone FDZ-A208 Declared Inoperable.Caused by Failure of Fire Detector.Hourly Fire Watch Established.Main Work Order Initiated to Repair Detector

ML20236L436
Person / Time
Site:	Davis Besse
Issue date:	11/06/1987
From:	Storz L TOLEDO EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
KA87-0249, KA87-249, NUDOCS 8711100337
Download: ML20236L436 (2)

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Docket-No. 50-346: EDISON l ' t

               ' License:No. NPF-3:                                                         LogNo;KA87-0249j

• NP-40-87-01 'l Serial No. 1 766 1

               . November.6, 1987'                                                      ,

d U. S.'NucleaE Regul't'ory a Commission. y Document' Control Desk ' Vashington', D. C. 20555 I Gentlemen j

Subject:

Special Report of: an Inoperable Fire Detection Zone Resulting from a Failed Detector in that Zone-1 On July'18, 1987 at 0700 hours, fire detection zone'FDZ-A208 was declared- ) inoperable. The required. fire watch hourly patrol:of-the zone ~ panel was immediately. established:in:accordance with Technical Specification'3.3.3.'8, action: statement "a". This fire' detection zone' monitors the 590 foot' elevation in the Shield Building annulus. . When:the FDZ-A208 alarm was' received,lthe:areaf j was surveyed, and no source of-fire or smoke'vas.found. JIt,vas determined that. ,1 one of the ten fire detectors (Allison, A1200 series ionization. detector) that lj . make up FDZ-A208 had failed. With this detettor' inoperable'the zone; alarm  ; i remains in alarm. Once the zone alarm is actuated, alarms from additional-  ; detectors in that zone are received at the. local' zone panel but do not  ; re-actuate the zone alarm into the control room.- > Maintenance'Vork Order (MVO) 1-87-2273-00. vas initiated on July'24,.1987fto. - repair the failed detector. Due to the' detector's location in a high radiation i area, the HWO vill;be worked during an outage of sufficient duration-to permit-scaffolding erection without excessive worker exposure'(planned.for the 5th refueling outage, approximately February 1988). .The detector will be examined' at that time to investigate the cause of its failure. ' 1 The hourly fire watch will continue until this detector / zone is returned to an operable status. On Oc ober 7, 1987, the Fire Protection Group noted that-the' fire protection. zone panel C-2720 had been in alarm since July 18, 1987 and the required'Special-Report had not'been submitted. Technical Specification 3.3.3.8 action! statement-

               '"b" requires a Special Report within 30 days after the fire detection zone had been inoperable for 14 days, h

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THE TOLEDO EDISON COMPANY ' EDISON PLAZA 000 MADISON AVENUE ., TOLEDO, OHIO 43652) fj y 4

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4 JDocksti No. 50-346.

   ;f License No. NPF-3                                                                                      '
         -Serial No.._1-766 November 6, 1987.                                                                                    )
        -Page 2 This Special Report was not' submitted within the required; time limit due to-
          . failure to follov. procedure. Personnel did not initiate a Potential' Condition                    1
                                                                                                                 )

Adverse to Quality Report (PCA0R) at the time FDZ-A208 was declared inoperable. i The Station's PCAQR system tracks the relevant action. statements'and informs'the appropriate group of the potential Special Report. _I

         'The Shift Supervisor ~ made his Unit Log entry indicating the zone was inoperable                    1 and noted that the' hourly fire'vatch patrol'was established.-   However,-he did                     I not-initiate a PCAQR. The Nuclear Group Procedure NG-0A-702 requires the                          -{

initiation of a PCA0R for an event potentially " reportable to anfoutside agency". As corrective action for the late Special Report, all Shift Supervisors vill be  ! required to review this incident to-improve their understanding of the proper , mechanism for ensuring such incidents are reviewed and reported appropriately. " These review vill be completed by November 20, 1987. This report is submitted in'accordance with Technical Specification 3.3.3.8 and-6.9.2. l Yours truly,. 1 ?fn - ) Louis F. S z j l Plant Manager . j Davis-Besse Nuclear Power Station j LFS/ed. cc: Mr. A. Bert Davis Regional Administrator i USNRC Region III I Mr.~ Paul Byron' DB-1 NRC Resident Inspector 1 _ _ _ - . _ _ - - _ - _}}