ML18093A325

Rev 1 to Special Rept 87-6:on 870723,fire Barrier Seal Found Degraded.On 870724,four Inadequately Sealed Penetrations Identified.Cause of Degraded Seal Not Determined.Hourly Roving Fire Watch Established

ML18093A325
Person / Time
Site:	Salem
Issue date:	08/26/1987
From:	Zupko J Public Service Enterprise Group
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
87-6, NUDOCS 8708310182
Download: ML18093A325 (4)

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SPECIAL REPORT NUMBER ---6 (Revision 1)

PLANT IDENTIFICATION:*

Salem Generating Station - Units 1 and 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Technical Specification 3.7.11 - Identification of Fire Barrier Impairments; Repair > 7 Days Discovery Date:- 07/23/87 Report Date: 08/26/87 This report was initiated by Incident Report Nos.87-293, 87-294, and 87-295 CONDITIONS PRIOR TO OCCURRENCE:

N/A DESCRIPTION OF OCCURRENCE:

On July 23, 1987 at 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br />, a Unit 1 fire barrier penetration seal was found degraded. The penetration is located between 64' and 84' elevations in the Auxiliary Building. An hourly roving fire watch had been established for this area previously due to other fire protection deficiencies. Therefore, the requirements of Technical Specification Action Statement 3.7.ll~a, were met.

On July 24, 1987, four (4) inadequately sealed penetrations, located in the vicinity of the Unit 1 impaired penetration were identified.

Investigation of seals in the mirrored location in the Unit 2 Auxiliary Building revealed three (3) similarly inadequately sealed penetrations.: In accordance with the requirements of Technical Specification Action Statement 3.7.11.a, an hourly roving fire watch was established in the vicinity of the Unit 2 inadequately sealed penetrations.

• Unit 1 Technical Specification 3.7.11 states:

nAll fire penetrations (including cable penetration barriers, fire doors and fire dampers), in fire zone boundaries, protecting safety related areas shall be functional.n Action Statement 3.7.11.a states:

nwith one (1) or more of the above required fire barrier penetrations non-functional, within one (1) hour either establish a continuous fire watch on at lea~t 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-function~l fire barrier penetration(s) to functional statqs within 7 days or, in lieu of any other report required by Specification 6.9.1, prepare and submit a Special Report to the 8708310182 8=~72 I t:-i'J. ), I\

~DR ADOCK 0 PDR ~

UNIT 1 SPECIAL REPORT ~ (Rev. 1) \ DESCRIPTION OF OCCURRENCE: (cont'd)

Commission pursuant to Specification 6.9.2 within the next (30) days outlining the action taken, the cause of the non-functional penetration and plahs and schedule for restoring the fire barrier penetration(s) to functional status.n Note - Unit 1 Technical Specification 3.7.11 differs from Unit 2.

The Unit 1 words nfunctional" and "non-functional".are replaced by the words noPERABLE" and "inoperable".

APPARENT CAUSE OF OCCURRENCE:

The cause of the Unit 1 degraded fire barrier penetration seal first found could not be positively determined. It had a foam type of seal which had loosened.

The cause of the Unit 1 and Unit 2 inadequately sealed fire barrier penetrations is inadequate design review. These penetrations were sealed with approximately four (4) inches of concrete during plant construction in 1971. Four (4) inches of concrete has not been shown to be adequate to provide a three (3) hour fire rating as is required for this fire barrier. In 1976, Branch Technical Position (BTP) 9.5.1, "Guidelines for Fire Protection for Nuclear Power Plants Docketed Prior to July 1, 1976", was issued. When PSE&G reviewed BTP

9. 5.1_, to ensure compliance, these penetrations were not identified.

It should be noted these penetrations are not visible from 84' Elevation and the height of the 64' Elevation ceiling is 18 feet, therefore, visual observation of these penetrations is difficult.

ANALYSIS OF OCCURRENCE:

The functional integrity of the penetration fire barriers ensures that fires will be confined or adequately retarded from spreading to adjacent portions of the facility. This design feature minimizes the possibility of a single fire involving several areas of the facility. The penetration fire barriers are a passive element in the facility fire protection program and are subject to periodic inspections. This report satisfies the reporting requirements of Technical* Specification Action Statement 3.7.11.a pursuant to Technical Specification 6.9.2 (both Units) since the time between discovery and eventual repair of the fire barrier impairment is greater than seven (7) days. Appropriate actions were taken in accordance with the requirements of Technical Specification Action Statement 3.7.11.a (both Units) to establish a one hour roving fire watch for the impaired fire barrier once the impairments were identified.

With the penetration impaired, it cannot be assured a fire in one area would not affect the adjacent fire area. Both areas contain detection and an independent suppression system in ~ddition to the roving fire watch patrol. Therefore, it is reasonable to assume that a fire in either area would be detected and extinguished before it could. involve the adjacent area. This occurrence therefore involved no undue risk*to the health or safety of the public.

, UNIT 1 SPECIAL REPORT ~6 (Rev. 1) >

CORRECTIVE ACTION:

l A one hour roving fire watch was established, in accordance with Technical Specification Action Statement 3.7.11.a. Due to the nature of the design change, the repair of the penetrations could not be accomplished within seven (7) days. The penetrations will be sealed with three (3) hour rated seals as per design change packages #1 &

2EC-2285. Long term corrective action includes a complete review of all fire barrier penetration seals in order to provide traceable identification of their adequacy as rated fire barrier seals.

G.f+/-l:::r Salem Operations MJP:pc SORC Mtg.87-065

Public Service Electric and Gas Companv P.0. Box E Hancocks Br*idge, New Jersey 08038 Salem Generating Station August 26, 1987 U. s. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Dear Sir:

SALEM GENERATING STATION LICENSE NO. DPR-70 DOCKET NO. 50-272 UNIT NO. 1 SPECIAL REPORT 87-6 (Rev. 1)

This Special Report addresses fire barrier penetration impairments in Salem Unit 1 and Unit 2 which have not been restored to functional status within seven (7) days. This revision corrects the date (s) of discovery from "June 23 and 24° to "July 23 and 24°.

Sincerely yours, J. fl:!:f.

General Manager-Salem Operations MJP:pc Distribution