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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E J*- i l m j-'dj i 'l )' t y >v l 9 , e,1 TOLEDO' 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 Commission. a Document' Control Desk y 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 the HWO vill;be worked during an outage of sufficient duration-to permit-

area, 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 K-00 6 s

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,x / : THE TOLEDO EDISON COMPANY ' EDISON PLAZA 000 MADISON AVENUE., TOLEDO, OHIO 43652) 4 fj y ..____..m__ m.--.

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f JDocksti No. 50-346.

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. '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 _}}