ML20214G304

Provides Addl Info Re 861016 Request for Exemption from Requirements of 10CFR50,App R.Field Check Verified That Lower Sprinkler Head Not Below All Cable Trays.Sketch of Elevation View Encl

ML20214G304
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	11/17/1986
From:	Lindblad W PORTLAND GENERAL ELECTRIC CO.
To:	Varga S Office of Nuclear Reactor Regulation
References
TAC-55831, TAC-63463, NUDOCS 8611260054
Download: ML20214G304 (3)

Text

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l'ORTLANn GENERAL ELucTurc COMPANY 12 f S. W. S A LM O N STREET WILLIAM J. LIN DBLAD PoRTLAN D, OR EGO N 97204 (SON 226-8875 November 17, 1986 Trojan Nucl ar Flant Docket 50-344 License NPF-1 l Director of Nuclear Reactor Regulation

{ ATTN: Mr. Steven A. Varga j Director, PWR-A

Project Directorate No. 3 i U.S. Nuclear Regulatory Commission j Washington DC 20555 I

Dear Mr. Varga:

4 I TROJAN NUCLEAR PLANT 10 CFR 50 Appendix R Exeastion Requests

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References:

1. PGR (B. D. Withers) to NRC (J. R. Miller) Letter, j Amendment 1 to 10 CFR 50 Appendix R Review, Dated May 31 I 1985.

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2. PCR (B. D. Withers) to NRC (S. A. Varga) Letter.

l Information on Appendix R Exemption Request, Dated 2

Dacomber 20, 1985.

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3. PCR (B. D. Withers) to NRC (S. A. Varga) Letter, 10 CFR 50 j

Appendix R Exemption Request, Dated October 16, 1986.

} Pursuant to 10 CFR 50.12 and discussions with Messes. Terence Chan and i John Stang of your staff, the following additional information is provided i in regard tu the specific exemptions previously requested per References 1 3

and 3 from the requirements of Appendix R to 10 CFR 50.

t l Special circumstances, as identified in 10 CFR 50.12(11), exist for granting i exemptions requested in References 1 and 3 to the requirements of 10 CFR 50 l Appendix R,Section III.G.2. For each of the exemption requests, applica-

! tion of the regulation is not necessary to achieve the underlying purpose

( of the rule. Rather, modifications required to meet Section III.C.2 of I Appendix R in addition to those described in the requests, would not i enhance fire protection above that already proposed. The specific j exemption requests have been previously submitted to the NRC and address:

a. Fire Areas A4 and A4a as described in Section 5.2.1 of Reference 1 and Sections 280.1, 280.2, and 280.4 of Reference 2.

b. Fire Area El as described in Section 5.2.2 of Reference 1 and I Section 280.1 and 280.7 of Reference 2.

1 0611260054 861117 F

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POHTLAND GENERAL ELECTRIC CSMPANY 4

Mr. Steven A. Varga November 17, 1986 Page 2

c. Fire Area T1, as described in sectio,n 5.2.3 of Reference 1, Section 280.1 of Reference 2, and Reference 3.

d. Fire Area Y1, as described in Section 5.2.5 of Reference 1 and Section 280.5 of Reference 2.

In a separate matter, in response to our conversation with Mr. Chan and Mr. Stang concerning the water curtain between Fire Areas A4 and A4a for the exemption request pertaining to these areas, a field check verified that the lower sprinkler head (below the 40-in. beam) is not below all l cable trays. A sketch of the elevation view is enclosed to ascist in your review. Please note that water flow from the suppression system is designed to be approximately twice that required by the NFPA Code. We believe the existing configuration has the attributes the NRC desires and, therefore, should be acceptable.

( We would be pleased to diacuss any questions or comments you may have regarding this information.

Sincerely,

, ==q#[

Attachment c: Mr. Lynn Frank, Director i State of Oregon Department of Energy 1

i Mr. John B. Martin i Regional Administrator, Region V U.S. Nuclear Regulatory Commission J

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