ML20206S149

Special Rept 86-5:on 860524,fire Damper 2CAF207 Failed to Close Upon Receipt of Automatic Trip Signal.Caused by Trip Mechanism Binding & Not Being Properly Adjusted to Ensure Automatic Operation.Mechanism Replaced

ML20206S149
Person / Time
Site:	Salem
Issue date:	06/30/1986
From:	Zupko J Public Service Enterprise Group
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
86-5, NUDOCS 8607070299
Download: ML20206S149 (3)

Text

________

UPSEG -

Public Service Electric and Gas Company P O. Box E Hancocks Bridge, New Jersey 08038 Salern Generating Station June 30, 1986 U. S. Nuclear Regulatory Coraaission Docuraent Control Desk Uashington, DC 20555

Dear Sir:

1 SALELI GCUERATING STATIOli LICENSE NO. DPR-75  ;

DOCKET NO. 50-311 i UNIT NO. 2 REPORT NO. 86-5 SPECIAL REPORT This Special Report, describing the circurastances currounding a degraded fire barrier due to an inoperable fire damper, is being submitted pursuant to the requirements of Technical Specification Action Stateacnt 3.7.11.a. This report is required within thirty l (30) days following the inoperability of a fire barrier penetration for any seven (7) day period.

l Sincerely yours, 860707 [g $ P U

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PDR General llanager-6 Salem Operations JLR:ama C Distribution The Energy People IE 3. 3.

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SPECIAL REPORT NUMBER 86-5

! PLANT IDENTIFICATION:

Salem Generating Station - Unit 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 98038 IDENTIFICATION OF OCCDBRENCE:

4 Fire Barrier Penetration (Damper 2CAF297) Inoperable Event Date: 05/24/86 Report Date: 06/39/86 I This report was initiated by Incident Report No.86-164 CONDITIONS PRIOR TO OCCURRENCE:

_ Mode 1 - Rx Powar 95 % - Unit Load 1999 MNe This special report describes the circumstances surrounding the degradation of a fire barrier penetration, caused by the inoperability of a fire damper. This report is submitted for informational purposes i in accordance with the requirements of Technical Specification Action Statement 3.7.11.a, which states:

With one (1) or more of the required fire barrier penetrations i non-functional, within one (1) hour either establish a continuous fire watch on at least one (1) side of the affected penetration, or verify the operability of fire detectors on at least one (1)

side of the non-functional fire barrier and establish an hourly fire watch patrol. Restore the non-functional fire barrier penetration (s) to functional status within seven (7) days or, in lieu of any other report required by Specification 6.9.1, prepare

, and submit a Special Report to the Commission pursuant to Specification 6.9.2 within the next thirty (39) days outlining the action taken, the cause of the non-functional penetration (s) and plans and schedule for restoring the fire barrier penetration (s) to functional status.

i DESCRIPTImi OF.OCCDRRENCEr On May 24, 1986, Fire Damper No. 2CAF207, located in a branch duct i from the ventilation header supplying the control room console, f ailed ,

post maintenance testing; the damper. f ailed to 'close upon receipt of ]

an automatic trip signal. Technical Specification Action Statement 3.7.11.a was entered at 9538 hours0.11 days <br />2.649 hours <br />0.0158 weeks <br />0.00363 months <br /> and the damper was declared

inoperable.

APPARENT CADSE OF OCCDRRENCE Investigation revealed that the trip mechanism was binding and could not be _ properly. adjusted to ensure automatic operation of the fire damper.

j SPECIAL REPORT 86-5  !

ANALYSIS OF OCCURRENCE: '

The functional integrity of the penetration fire barriers ensures that fires will be confined or adequately retarded from spreading to adj acent portions of the f acility. This design feature minimizes the possibility of a single fire rapidly involving several areas of the f acility prior to detection and extinguishment. The penetration fire barriers are a passive element in the facility fire protection program and are subject to periodic inspections. The inoperable fire damper constitutes a breach of the associated fire barrier. Howev er, compliance with the requirements of Technical Specification 3.7.11 provides adequate assurance that a fire will be readily detected and extinguished; thus, alleviating the possibility of a fire af fecting adjacent portions of the, facility. Additionally, this inoperable damper is in series with Fire Damper No. 2 car 204 (located in the main )

header) which isolates all three branch lines supplying the main console and recorder panel. 2CAF204 remained in an operable status; consequently, upon receipt of a fire alarm, the branch containing the inoperable fire damper (2CAF207) would be isolated. This occurrence therefore involved no undue risk to the health or safety of the public. However, because the fire damper was not returned to an operable status within the seven (7) days specified by Technical Specification 3.7.11, the occurrence became reportable as of May 31, 1986, and this special report is therefore submitted pursuant to the requirements of Technical Specification 6.9.2.

CORRECTIVE ACTION:

The fire damper trip mechanism was replaced. The damper was then tested with satisfactory results and restored to an operable status.

Technical Specification Action Statement 3.7.ll.a was terminated at 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br />, June 1,19 86. Due to the isolated nature of this occurrence, no further corrective actions were deemed necessaary.

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d eral Manage -

Salem Operations JLR:tns SORC Mtg 86-048 i

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