ML20099B042

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Forwards Response to NRC Bulletin 92-001, Failure of Thermo-Lag 330 Fire Barrier Sys to Maintain Cabling in Wide Cable Trays & Small Conduits Free from Fire Damage. Roving Fire Watches Established for Areas Listed in Table 1
ML20099B042
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 07/24/1992
From: Cottle W
ENTERGY OPERATIONS, INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GNRO-92-00095, GNRO-92-95, IEB-92-001, IEB-92-1, NUDOCS 9207300119
Download: ML20099B042 (8)
v • d • e


Text

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July 24, 1992 U.S. Nucient Regulatory Commission  !

fin t ] 8 tat ion PI-137 l Washitigt.on , D.C. 20555 l

Attontlon: Dotiiment Control Desk

Subject:

Grand Gul f Nuclear St at lon Unit 1 Docknt No. 50-416 1.f conno No. NPF-29 Responso to NRC Hulletin 92-01 GNRO-42/000%

Gentlement This nubmittnl provides the Grand Gu,f Nuclear Station (GGNS) responso t o NRC !!ulletin (NRCD) 02-01, "rn flure of Thntmo-l.ng 330 Fire linrrier System to finintniti Cabl A it in Wido Cabin Trays and Small Conduits Tree from Fire Damngo". This Bunatin notifind liennsens of failuros in f.iro nndurnuco t es t ing - nssocint.ed with t hn Thormo-l.ng 330 firo barrinr' system that .l s used to prot ect sofn sinitdown capabil j ty, NR::B 92-01 requested 1iconsees to

- take certain iminediat e act ions and provido a written response within 30 days descrJbing tho actions taken and actions planned ta rnsolve thn noticu rtis . -

OGNS has identified the pinnt arens which have Thntmo-i.ng 330 installnd and implement ed t he immedint n compensat ory nctions specified in it ems 1 nnd

of thn Dullotin. In response to iter 'l of N'?CD 92 n!, 6GNS is participatlng in ihn 1,0!iARC eff orts to coordinato an induntry wido evaluntion of Thermo-l.ag 330. Discussion of these actJons is providnd in Attachment 1.

( As requested by NRCH 92-01, thin informat ion in being submitted under onth i

and a f firmat Jon in accordanen wit h 10CFR50.54( f) ( At tachment 2). P!nnso

( t.outact'this-office should you have any questions, or need additional L informntion regarding this matter.

j' Yours tru y,_

.f s WTC/CED/nms i attachments: 1) ' GGNS Response to NRC Dullet in 92-01

2) Dath and Affirmation per 10CFR50.54(n cc: (Sco Nnxt page) i 09207171/SNI.lCFI,R 1 9207300119 920724 m E90u,,19 s PDR. ADOCK 05000416 0 PDR

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July 24, 1992-

. GNRO-92/00095 Page 2 of 3

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cc Mr. D. C. Illntr. (w/n)

Mr. J. 1.. Mathin (w/n)

Mr. R. D. McGehno (w/n)

Mr. N. S. Reynolds (w/n)

Mr. II, b. Thoman (w/a)

Mr. Stewart. D. Ebneter (w/n)

Regionni Administ rntor U.S. Nuclear Reguintory Comminnion -

Hngton 11 101 Harlott n St. , N.W. . Suite 2900 Atlante, Georgia 30323 Hr. P. W. O'Connor, Projnct Managnr (w/2)

Of fIce of Nucicar Reactor Reguintton U.S. Nucionr Roguintory Commission Hn11 Stop 13113

. Washington, D.C. 20555 h

~

Mr. Diff Bradley (w/n)

Nucient-Hanngement and Resourcnn Council 1776 Eyn Street, N.W.

Sulta 300

-Washington, D.C. -20006-2496 :I s.

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09207171/SNLICFl.R - 2'

t Attachment I t-o G"RO-92/00095 f s

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l GGNS Response to NRC Bulletin 92-01 ,

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4 At t nehment 1 t o GNRO-92/00095 Pago 1 of 3 Grnnd Gulf Nucient Station

. Response to NRC Bulletin -01

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Report ing Rorpiirement s applienhlr to holders of opersting licensoH for nucionr pownr reactors NRCil it em No. 1: Plants that use either 1- or 3-hour pre-formed Thermo-l.ng 330 panels and conduit shnpos are requested to identify the arens of the plant which havn Thermo-I,ng 330 fire barrior anterial installed and determino the plant arens which usn this motorial for protecting nither amnll diamater conduit or wido _.

cable trays (widthai grentnr than 14 inches) that. provide t4afn shutdown capability.

GONS Responsn: GUNS usns both I hour and 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> pro-formed Thermo-i.ag 330 firn barrior material for protecting equipment required to achinvn and maintain safe shutdown in the event of a fire. Tho areas applying Thermo-l.ng 330 to protect small conduit and wido cabin trays worn 4 identified using the following criteria:

"Small diamotor conduit" includes conouit 4 inches in dinmnter and seniler; " wide cable trays"- includo

> trays wider thnn 14 . inches. Table 1 lista thn specific arnas ~ 1 dent ified. in addition, non-circuit /rncewey

- _ applications outalde the scope of NRCB - - -

92-01 worn identified and nrn listed in Tnblo 1.

NRCD lte,iNo. 2 for plant arcan in which Thnrmo-i.ng firn barriern arn used to protect widn cabin i trays, smal1 conduits, or both, the licensen should implement , in accordance with pinnt procedures, thn oppropriate compensatory measurns, such as fire watches,' consistent with those which

,, would be implemented by nither the plant technical specifications or the operating license for an-inoperable fire-barrier.

GGNS Response: As stipulated by the Bullntin, GGNS-established compensatory measures consistent with the ac lons normally.

taken for inoperabic firn barriers.

09207171/SNI.lCPIR - 5

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4 At tochment 1 to GNRO-92/00095 Page 2 of 3'

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I Grand Gulf Nuclear Station Responso to NRC Bulletin 92-01 GGNS Response: Rov.ing hoorly fire watchna were (Continued) os.nblished per the GGNS fire protection program for arens listed in Tabla 1, both wit.hin arul without the scope of NRCh 92-01. )

1

- NRCB It em No. 3: Each licenson, within 30 days of l receiving this bullotin,.is required to provide a written notificnt.f on stating.

, whether it has or dons not have Thormo-l.ng 330 firn barrier systems Installed in its far t11 tics. Each ifconsen who han installed Thntmo-1,ng-330~.<.istn11cd fire barrior is required to inform the NRC in writing whether the actions in items 1 and 2 have been impicmented and la required to describo.  !

the measures being taken to enr. urn or

  • rentore firo barrier opernbility.

GGNS Responne: This submittal satisfies the-30 dny

  • reporting requirement of NRC Dulletin i 92-01. GGNS has Thermo-1,ng 330 installed '

fire barrior systems within the scopo of  ;

NRCD 92-01. Approprinto actions to resolve fire betrier concerns are being developed through an industry program being coordinated by NUMARC. This ,

program will include establishment of a l tost. database, developmentiof guidance j for' npplienbility of tests, and '

t coordination of addit.f onni testing as  ;

appropriate. We will apply the results of these offorts, when completed, to the Thermo-I.ng 330 installations at GGNS.

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Attachment I to CNRO-92/00095 '

Page 3 of 3

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Ctand Culf Nuclear Station  ;

. Itenponse to NRC lhillotin 92-01 [

Tahin 1 _;

Aronn using Thormo-l.ng *30 to protect unto shutdown racewayn i Crit oria: Conduit with diamotor of 4 inchns or inss.

Cabin trays wider than 14 inches.

Fire Zono . .

Dencription _ _ _ ,

.00202 Unit 1 Division 1 Switchgonr Area I 00214- Unit 2 Division i Switchannr Arna ,

0C302 IIVAC Equipmnnt Room I

-00308 Unit 1 Control Building Corridor 0C402 Unit 1 I,ownr Cable Spreading Room

  • 0C702 Unit 1 Upper Cable Spreading Room 1A316 Motor Cont rol Center IA539 Cabin Spaco Non-Circuit / Raceway Applications of

- >---- Thermo-hag 330 at. CGNS l

OC214 -Unit 2 Division i Switchgoar Aron-(Thermo-1,ag 330 enhnncement of fire ,

barrier which separates Firn Zonen 0C217 and.OC214).

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.00303 IIVAC Equipment Room (Thnrmo-1,ng 330

({

nnhancement of firo barrier which

( separaten Firo Zones 0C217 and OC303).

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C9207171/SNI,1CFI,R - 7

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Attachment 2 to GNRO-92/00095 i:

i GGNS Response to NRC Bulletin 92-01 4 Dath and Affirmation for Response to NRC Dulletin 92-01 6

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. AFril)AVIT STATE OF HISSISSIPPf col'NTY OP Ci,AlllOENE C. R. Ilutchinson states that he is Conoral 11anager, P l a n t. Oporet ions of Entergy Opnrnti- luc. (Grntid Gulf Nuclear Station); that hn is nuthorized on t' ,- it of said company to sign and flin with thn Nuclear Regaln t or y Corami '

this responnn to NRC Holletin No. 92-01 on behalf of the company nnd . south Mississippi 1,lectric Power Asr.ociation; that he _

signed the foregoing letter ns Gener n l 11anage r , Plant Operatlonn of Entergy Opern t tons , Inc. (Ornnd Gulf Nuclent Station); and that the statements mndo atul tra tt e rs set fort h t hernin Arn tiun ntal accuratn to the best of his knowledgn, informatlon and belief.

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(U. R. thit c h inson SUBSCRillED AND SWORN To bnforn mn, a Not a ry l'nbl ic, in atul for the County and Statn abovn ncmed, this A ___ day of __._. '

__ , 1992.

( S E Al.) " ,

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. QJYs Notary Public ity commission expires:

A commt,% rqw Ms ! i

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G9207 ' 71/SNI.1CFI,K - 12

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