ML19246A926

Submits Info Re Conceptual Design of Plant Fire Protection Sys

ML19246A926
Person / Time
Site:	Yankee Rowe
Issue date:	07/02/1979
From:	Moody D YANKEE ATOMIC ELECTRIC CO.
To:	Ziemann D Office of Nuclear Reactor Regulation
References
WYR-79-73, NUDOCS 7907090255
Download: ML19246A926 (4)

Text

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United States f.'uclear Regulatory Connicsion Washington, D.C.

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Attention:

D. L. Zicnann, Chief Operating Reactors Eranch #2

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Division of Operating Reactors t

9eferencen:

(a) License fio. DPR-3, (Dccket !!o. 50-29) j (b) US!!RC letter to YAEC dated March 15, 1979, l

Subject:

Amendreat No. 56 to Facility Operating Licence (c) YAEC letter WYR 79-45 to DDR dated April 10, 1979,

Subject:

Submittal Schedule

Subject:

Infcrmatica for !!BC Review Reft 'ence (c) above trancmitted to you a schedule for cub.rittal of design information on Yankee Rowe fire protection systers.

The cenceptual design hac been donc on most of the systers, and the information is contained in this letter.

SER Paragraph 3 1.1, a tcans of detecting fires in the containment.

This nubject in still under study, due tu the locatien and srplexity of decifn.

Once a decision hca been made, the information will be sent for your review.

SER Paragraph 3 1.5, Water Supprecnicn Systens Diesel Generatcr Room Protecticn A dry pipe cprinkler system will be installed in each diesel generator reor.

The cystr r ill be t,,nually actuat ed frca a valve station outside cach room.

r?.ch rprinkler will be capable of providing a cpray density of.3 Cp:/cq. ft.

I;ozzles will be of the standard upright type and thermally activitated at 212CF.

A strainer is to be installed in the cormon feedline to the sprinkler systern.

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e A single 75' hose staticn will be i ns',a ll ed in the bui)di housing the diecel generators.

The hose ntation in accessible f:

an outside door and is rincd in accordance with ?!PFA !!o. 14

/6 to provide Clasa II scr' ice.

Water cupplien will tm provided to the hace ntiticn and aprinkler systems from two < idely ceparated ? ocations on the yard fire main, cach with isolatico c 1pability.

l Hydrogen Seal Oil *: nit and Tranaformer Oil Cooler Protection An automatically initiatod deluge system will provide nuppression capability for the ce31 oil and transforner oil cooler are7.

This nynten will consist of tho exinting open h?ad nczzles supplied by a piping netwcrk and cn automatically operated deluge valve.

A series of detectora located in the protected areas chall be connected so that an oil or hydrogen fire activating any tuo detectors will cauce the deluge valve to o;a n.

"anu11 actuation vill also be provided.

Alarrs indic7 ting cyctcm operation will be provided.

Turbine Building Sprinkler System The turbine buildinc cprinkler cystem wi'l be codified and will concist of thermally actuated cprir.k1c" heads supplied from a continu:.uuly precourined piping net. tor.

Tha cprinkler coverage will be increas d and will include the iren under t he :1. itchgear room which containa the steari generator feed pumps and the air c rprescors.

The open head nozzlea previously uned to cover cpecial hazards (turbine lube oil tar, and trancformer oil coolers) will be supplied from a different cource deceribed elcewnere.

Area oprinkler will also cover thece special hazards.

Thermally actuated cpray nozzles will be installed to cool and protect tho turbine building columns adjacent to :,he control room /

cwitchgear room area.

?.uxiliary Doller Room Protecticn An automatically initiated sprinkler Lintcr will be installed in the auxiliary boiler roc.' to provide aupprercicn c7pability to the entire area with an average spray density of 0 3 cpm eer square foot.

SEP Pararraph 31.6 Turbire Lube Oil Reservoir Protectica The turbin lobe oil " > 2 ;rvoir will be pro. ided with two modifications to reduce its potential fire h.12ard.

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An aute~ntically actuated fo^n delu,e nyctem will be installed to b1; > :et the lube oil tar? and the area encloned by the wall describ: 1 35072.

A fire dM catien cynter. locatee eove the lube oil storxe tank will natuM : the foam system and rcund appropriate alarm.

A timira device will be ircluded which will allou _ufficient fe r ". m. fcr fire aupprescicn but limit the amount to prevent overficwing the containing wall.

SER Paragraph 3 1.7, cas Supprecnicn Systems Halen 1301 Suppreccion An automatic fixed Ihlen 1331 supprencion cycten will be installed in the uitchcear roc:r.

The cyctem sill be decinced in accordance with LTPA 12A, and will include bcth a detection and extinruishing

,sycten.

The detection will be designed in a croca-cr;cd or similar arrangement.

The firct detectcr etuation will initiate necennary dar.per clocures r.nd fan cut-offs, and alarm in the the control roon.

The second detector netuatien will cause a release of the !blon cupprernant.

The extinguiching cyctem will provide a high speed releane of ihlon 1301, and Jill totally flood the switchicar room.

A uniftrm extinguishing ccncontration will be created inside the roon.

The concentration, amount of agent and time for which the concentratic,,;ill be r.aintain2d will be baned upon the ofze of the room, an5ient temperature, ar? ccncentration required to extinguish or inert th" particular fuel invol/ed.

This data will be developed during the detailed design phase of this cystem.

SER Paragraph 3 1.12, Modificaticns Outside the Diesel Generator Rooms There are three modifications to be made.

They are:

1.

Spray Shield:

A cpray shield will be added south of the D/G fuel oil supply 12 ne.

inis ahield, made of a fire retardant plactic, will be hung frca the roof within the diecel generator buildjn~ and run east to.nt in front of the fuel oil line.

The chield will be cut and fitted around existing pipe and condulta, with any cuts cr Sales repaired with the race material factencd in cuch a manner that an oil apray will not bypara the shield.

The chield will bS fashioned co that an-y fuel oil leak will hit the shield and drain to within the moat in frcnt of the dienel generator cubicles.

2.

Oil Ca A 4" high curb ':ill be added in front of the die sel genera ter cubielec.

The rcot will cervo twa purpeces; the firnt is to eclloet any 011 w: !rh @ airs off the nora) -..ield in co;e of a pipe break, the recend is to prevent any fuel oil fron rit S"tb:r ';ith: 1

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A drai n're nycte:a will oe added within the r.o:L.

Thin nynte"' will dr lin to the oil receivin; tank, which hic level indientica ned alarm, out"ide the c7fety injetinn building.

rne pipig will : a/u a back:witer valve to prevent dieael fuel oil frcn flo.-zing back ur the pipin; if the tank ww co fill from the draina in ca 'h dienel cubicle.

We trust that tha above infocation ic adequate for your review at this tir".

Due to cer-clalar co:.i t ents, detailed dvair,n and procurement will be p: v;reenin<', d < ira, your review.

Ire re fore, if you have any questions or c c:.~.cn ts, ple^_

parn the~1 on to uc as coon rc possible.

Very truly yours, YA? ::EE ATOMIC ELECTRIC CC"?A: Y C

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