ML19323E564

Presents Review of Util Re Fire Protection Mods Identified as Open Items in Fire Protection Safety Evaluation.Mods Re Cable Tray Tests & Containment Fire Suppression Are Acceptable

ML19323E564
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	05/09/1980
From:	Benaroya V Office of Nuclear Reactor Regulation
To:	Varga S Office of Nuclear Reactor Regulation
References
NUDOCS 8005230766
Download: ML19323E564 (2)

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" Sic:'NiO'!! FQh Steven Varga, Chief J

Operating Projects Branch 21 Division of Project Itanagcoent FRO:t:

V. Senaroya, Chief Chemical Engineering Branch Division of Engineering SU3 JECT:

TROJAt: liUCt.EAP. FLNIT: OPE!i FIP.E PROTECTICii ITEns (TAC 11073)

By letter dated April 14, 1920, the Pertland C-encral Electric Canpany, prcvided information regarding two specific fire protection nodificctions tJentified as "open" in the Trojan Fire Protection SEC. We have c xplated cur revieu and it is presented belev:

Iten 0.2.2 - Cable Tray Tests In the SER, uc expressed a concern for separation of redundant equipment and cabling in the switch gear reoc. The licensec proposed to install a three-hour fire rated Wall to separate Train A and Train a equipment in the arca. He have reviewed this proposal and detemined that an appropriate design basis has been selected.

Cased cn our evaluation, uo conclude that the installation of the three-hour fire rated wall in the switch gear rem will preclude the possibility of a fire affecting redundant equipaent and, therefore, it is acceptabic.

Item 3.2.G - Containcent Fire Suporession The licensee had ccznitted to a RCP oil collection systca, however, we were concerned as to whether this system would be designed for leaks and/cr dropping of systen coc:ponents during an SSE. The licensee responded to this concern by stating that the oil collection s'nts will be seisnically supported and sized for the largest oil icak that couId occur during the SSE. We have reviewed this proposal ar.d are satisfied that an appropriate design basis has been selected.

Based on our ehluation, we conclude that the installation of a seisaically designed RCP oil collec* ion system meets our fire protection guidelines, and, it is, therefore, acceptable.

The licensee had previously comitted to installing a remote shutdown systen for the cable spreading reco. However, the licensee in their letter of /fril 14, also requested that we re-review the necessity for requiring a remota shutdown system for the cable spreading rom if a special autenatic fire suppression syst m ucrc installed. We reviewed this request and determined c=ncip.

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Stevan "arga that their latest caproach was conceptually not acceptable. The PrcJect

!!anacer on !!ay 2 infon.:ed the licensec of this ccnclusion by tc1cphene.

The licensec indicated that they uculd stay with their original comitnant for the time being.

V. Benaroya, Chief Checlical Engineering Branch Division of Engineering Ocdtact:

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