ML20099B217
| ML20099B217 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 07/24/1992 |
| From: | Parker T NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-92-001, IEB-92-1, NUDOCS 9207300257 | |
| Download: ML20099B217 (3) | |
Text
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Northem Statea Power Company 414 Nicollet MaH Minneapobs. Mmnesota 55401 1927 Telephone (612) 330M00 July 24, 1992 NRC Bulletin 92 01 U S Nuclear Regulatory Conanission Attn:
Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NULLEAR LENERATING PIANT Docket Pos. 50 282 License Nos. DPR-42 50 306 DPR-6P b
Response to NRC Bulletin 09-01 I%11ure of Thermo Lag 330 'rire Barrior System To Maintain Cablinh in Wide "nb.
Trays and itnall Conduit s Free Jm.t rire Damann 1
On June 24, 1992, an advance copy of NRC Bulletin 92 01 " Fall.ure of Thermo Lag 330 Fire Barrier System to Maintain Cab ing in Wide Ctble Trays and Small Conduits Free From Fire Damage" was received at Prairic Island.
The bulletin required that each licensee submit a written response to questions concerning usage of Thermo-Lag at each facility.
Based on an evaluation of the information contained in this bulletin, several fire barriers were declared inoperable on June 24, 1992 and compensatory measures were established.
'.le of9er the following as our response to the third reque sted action of Bulletin 92-01 and it also provides the information necessary to satisfy Technical Specification 3.14.G.2., which requires tha* a special report be submitted to the Commissio.1 when an inoperable fire larrier cannot be restored to operabic status within 7 days:
t Each licensee, within 30 days of receiving this bulletin, is requircd to provide a written notificaticn statlng whether it has or does not have Thermo Lag 330 fire barrier sys ems installed in its facilities.
The Prairie Island Nuclear Generating Plant presently uses Thermo-Lag 330 Fire barr'ar Systems !.n six (6) individual fire areas. There are approximately sevin he tred (700) linear feet of cable trays and conduits that are protected by tha 'thurmo Lag materials.
Each licensee who has installed Therco-Lo: 330 fire barriers is required to inform the NRC, in writing, whether it has taken the above actions and is required to describe the measures being taken to ensure or restore fire barrier operability.
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July 24, 19 %
Page 2 Presently a Special Order bra been implemented which directs the site's compensatory actions.
These actions include a once per hour roving fire watch covering the six affected fire areas.
The Special Order also directs that, in the event that the fire detection system in these areas is rendered or found inoperable, a continuous fire wat ch win be established in that area.
These compensatory actions are consistent with the Prairie Island Nuclear Generating Plant Ts chnical Specifications for Penetration Fire 13arriers (TS.3.14.G.2).
Appropriate actions to rer. ore fire barrier operability 9re being developeJ through an industry program being coordinated by NUMARC.
This program will include establishment of a test database, development of guidance for applicability of ten,ts, development of generic installation guidance, and consideration and coordination of additionel testing as appropriate.
We will apply the results of these efforts, when completed, to Thermo Lag installations within the ecope of bulletin 92-01.
Please contact us if you have any questions related to our response
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hbmas M Parker Manager Nuc1 car Support Services c: Regional Administrator - Region III, NRC Senior Resident Inspector, NRC NHR Project Manager, NRC J E Silberg
Attachment:
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d UNITED dTATES NUCLEAR REGU!ATORY COMMISSION NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENI. RATING PIANT DOCKET NO. 50 282 50 306 Response to NRC Bulletin 92 01, " Failure of Thermo Lag 330 Fire Barrier System to Maintain Cab 1' 3 in Wide Cable Trays and Small Conduits Free From Fire Damage",
Northern States Power Company, a Minnesota co: poration, hereby provides the information requested by NRC Bulletin 92 01, titled " Failure of Therno-lab 330 Fire Barrier System to Maintain Cabling in Wide Cable Trays and Small Conduits Free From Fire Damage", Pursuant to 10 CFR 50.54(f).
Answers to the specliic questions asked by the bulleth are provided in attachment 1 to this submittal.
This letter contains no restricted or other defenso information.
NORTHERN STAT S POWE MPANY By _ _ #
})/u Thomas M Parker Manager, Nuclear Support Services on thisc[h y of
,_ e dcQ,heforemeanotarypublicinandforsaid County, personally ppefre'd 'lhomas M Parker, Manager, Nuclear Support Services, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he j
knows the contents thereof, and that to the best of his knowledge, information, and belief the statements made in it ere true and that it is not interposed for delay.
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