ML19290E879

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Forwards Recommendations for Fire Protection Design Review Items 3.1.2 & 3.1.23 Re Carbon Dioxide Hose Reel Nozzles & Smoke Exhaust
ML19290E879
Person / Time
Site: Point Beach  NextEra Energy icon.png
Issue date: 11/30/1979
From: Macdougall E
BROOKHAVEN NATIONAL LABORATORY
To: Fergunson R
Office of Nuclear Reactor Regulation
References
TAC-11079, TAC-11080, NUDOCS 8003170255
Download: ML19290E879 (2)


Text

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7.a BROOKHAVEN NATIONAL LABORATORY

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l ASSOCIATED UNIVERSITIES, INC.

n u Upton, New York 11973 Department of Nuc!ect Energy (516) 345 2362 November 30, 1979 Mr. Robert L. Ferguson Plant Systens Branch U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Bob:

Attached are our reconmendations for design review itens 3.1.2 and 3.1.23 for Point Beach Nuclear Plants - Units 1 and 2.

Very truly yours, Edward A. MacDougall Reactor Engineering Analysis E/N: sd attachment cc.: R. Cerbone wo/att.

R. Hall W. Kato wo/att.

V. Panciera wo/att.

E. Sylvester S

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POINT BEACH NUCLEAR PLANT FIRE PROTECTION REVIEW SER Item 3.1.23 Carbon Dioxide Hose Reel Nozzles Item 3.1.23 of the Point Beach SER indicates that the nozzles for the Con-trol rom carbon dioxide hose reels will be modified to facilitate manual sup-pression inside Control rom panels. The existing nozzles are large and would be difficult to maneuver within the cabinets.

The utility has submitted a drawing of a typical Cardox hose reel illus-trating the proposed nozzle. This unit has a horn diameter of approximately 5-13/16 inches and a length of approximately 12 inches. Attached to the horn is an extension handle approximately 12 inches long with a control valve at the attachment point to the hose.

This arrangement is a standard carbon dioxide hote reel / nozzle arrangement and is acceptable in meeting the concern addressed in SER its 3.1.23.

3.1.2 Smoke Exhaust Item 3.1.2 of the Point Beach SER states that a manually - actuated smoke exhaust system will be installed for the cable spreading rom, control rom and caputer room and that additional portable smoke venting equipment will be provided .

The submittal fra the licensee includes specifications and plans covering the design and construction of the system. The design consists of a single integrated system with one vent fan and several rmotely operated dampers located in the ductwork. The system is arranged to be operated from a control panel which includes a start switch, damper actuation switches and indicator lights. The installation is specified to withstand 350*F hot gas application with a capacity of 12000 SCFM at 1.75 inches W.G. static pressure.

This design meets the requirements of the concern for a manually-actuated smoke exhaust system serving the control rom, cmputer room and cable sprea-ding rom. The design documents do not, however, include specific testing re-qui rements . They indicate only that appropriate test procedures are to be es-tablished and implemented. Specific test requirments should be included in the design criteria which will assure that the system will perform as intended including operation of the dampers, fan and proper air movements.

With the addition of these specific testing requirments the proposed manually-actuated smoke exhaust system for the control rom, cmputer room and cable spreading rom is acceptable.

This response does not address the requirment for additional portable smoke venting.