ML20077D058

Itemizes Clarification of Encl to Re Request for App R Fire Protection Exemptions,Including Revised Description of Proposed Plant Mods to Fire Zones 1-4

ML20077D058
Person / Time
Site:	Point Beach
Issue date:	07/20/1983
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	Clark R, Harold Denton Office of Nuclear Reactor Regulation
References
TAC-11079, TAC-11080, NUDOCS 8307260335
Download: ML20077D058 (2)

Text

l lHsconson Electnc macoww 231 W. MICHIGAN, P.O. BOX 2046, MILWAUKEE, WI 53201 July 20, 1983 Mr. H. R. Denton, Director Office of Nuclear Reactor Regulation U.

S. NUCLEAR REGULATORY COMMISSION Washington, D. C.

20555 Attention:

Mr. R. A. Clark, Chief Operating Reactors Branch 3 Gentlemen:

DOCKETS 50-266 AND 50-301 APPENDIX R EXEMPTION REQUESTS POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 By letter dated April 28, 1983 and enclosure thereto, Wisconsin Electric Power Company submitted a revised scope of requested Appendix R fire protection exemptions and included a revised description of proposed plant modifications.

As a result of subsequent telephone discussions with the NRR staff, we believe that further clarification of the modifications proposed for the Point Beach auxiliary building would be helpful.

The following itemized clarification of the enclosure to our April 28 letter is therefore provided:

Page 8, Item 7.1, Fire Zone 1 The proposed automatic fire suppression system for this fire zone will include specific coverage of the open archways to Fire Zone 2 on the north side and to the HVAC room on the south side, as well as providing coverage over the doorways to the charging pump cubicles.

Additionally, fire stops will be installed in cable trays routed in the east-west direction which constitute intervening combustibles between redundant charging pump cables.

This provision will restrict the propagation of a potential fire and enhance the separation of redundant cables.

/poh l0 8307260335 830720 PDR ADOCK 05000266 F

PDR

. ~ -.. -

<,r' Mr..H. R. Denton July 20, 1983 I'

Page 8, Item 7.2, Fire Zene 2 The existing automatic fire suppression system for i

this fire zone will be modified.to include specific coverage of open archways :o Fire Zone 3 on the north side and.to Fire. Zone 1.on.the south side.

The system will also be expanded in the west direction to assure that one division of charging pump cables and the i

intervening. cable trays are protected.

Page 9, Item 7.3, Fire Zone 3 The installation of.a fire.s' top in cable tray FV07.

has been. proposed.

The section of tray FV07 and

. conduits'containing Unit.2. division B, charging pump cables which.are located between the proposed fire stop and Fire Zone 3 walls will be enclosed.

The enclosure will be composed of a material which in a i

tested configuration has passed ~an one-hour fire test.

Page 10, Item 7.4, Fire' Zone 4 The proposed automatic fire suppression system for this fire zone will include specific coverage of the open archways to Fire Zone 3 on the south side, as

~

well as coverage over the doorways to the charging i

pump cubicles.

i Additionally, fire stops will be installed in cable i

trays routed in the east-west' direction which

. constitute intervening combustibles.between' redundant charging pump cables.

This provision will restrict i

L the propagation of a potential fire and' enhance the l-separation of redundant cables.

The above clarification' demonstrates more fully the I

strength of the fire protection measures which we propose to provide-for the Point Beach auxiliary building.

Very truly yours, Vice President-Nuclear Power C. W. Fay Copy to NRC Resident Inspector l

t lc 1

.u-.

,...__,_,..~,....____.m.--_a.._,--._-_.--.,_,.__..-.._-.._

,