ML19312D192

Forwards BNL Input to Plant Fire Protection Review,Items 3.1.3,3.1.4 & 3.1.5.Gas Suppression Sys & Water Suppression Sys Are Satisfactory & Should Be Accepted.Fire Water Sys Should Be Rejected.Approved Fire Pump Controller Needed

ML19312D192
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	03/14/1980
From:	Randy Hall BROOKHAVEN NATIONAL LABORATORY
To:	Ferguson R Office of Nuclear Reactor Regulation
References
NUDOCS 8003210448
Download: ML19312D192 (4)

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,1 BROOKHAVEN NATIONAL LABORATORY N

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- ASSOCIATED UNIVERSITIES, INC.

ypicn. New verk 11973

? Deportroent offJue:ect Erergy; (516) 345-2144

. March 14, 1980

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Mr.(RobertL.Ferguson

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Plant Systems Branch _

iDivision ofzOperating Rtoctors.

LU.S.. Nuclear Regulatory Commission

' Washington,:D.C. 20555

'.RE:

Zion.1-2, Fire Protection. Review, -Items 3.1.3, 3.1.4, and 3.1.5.

Dear' Bob:

Enclosed ^are ltems -3.1.3, Gas Suppression Systems, 3.1.4, Water Suppres-

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sion Systems, and 3.1.5, Fire Water Systems for Zion 1 and' 2 Nuclear Power

. Pl ant.

-- The items _-quoted in the'SER' for item 3.1.5 are the ones either noted with

--an asterisk or ones-that we were ask_ed to-look at verbally. Note that the

. storage' area ; adjacent to the;fifth battery room-is not included.

This completes our: Zion 1-2 input for the items on hand.

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- Please note that.this review is 'a duplicate of the one sent to you dated

. March 7, '1980 with one minor paragraph change in. Item 3.1.3.

5 Respectfully yours, l'

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. /)16WI. C Wp Q

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Robert.E. Hall, Group Leader.

Reactor' Engineering: Analysis-

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?cc.: L.-Derderian' D. Eisenhut-

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[00la E. ' MacDougall*

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~ ZION 11and 2 ~

Fire Protection Review.

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' 11 tem 3.1.'3

Gas' Suppression Systems.

The SER states that 'an automatic Halon: suppression system backed up by a man-y:!ually; actuated C02 system will be-provided to protect the following areas:

11.nInner and outer-cable spreading-areas-

12. ; Containment penetration cable: vaults Cables routed' through the. stairwell adjacent to the cable spreading area will-be enclosed. in a fire-barrier and protected by an automatic gas. suppression system.

j-An automatic gas' suppression system will be installed to protect the diessi-driven contrinment spray pumps. A curb will be provided to limit the spread offan oil s Illifire in this area.

The.licenste on 0ctober 31,.1979 submitted design information on 3.1.3, Gas Suppression. Systems The areas in' the submittal included the inner and outer cableispreading areas, containment penetration cable vaults, and contaiscent s,uay! pump rooms. The = licensee has eliminated the gas suppression system for

' the protection-of. the. proposed enclosure ~ of the cables-in the stairwell and has-~ indicated the; redundant cables will be protected by a rated enclosure.

Design'information on this' protection of the cables in the stairwell was not

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includedlinltheLpackage.= The-licensee. proposed in this letter to install an automatic'Halon system in each of. the cable spreading areas and each of the containment penetration cable ' vaults. Each of these four areas is backed up with a manualy activated CO2 system. For the containment spray pump rooms,

' the licensee-proposed an: automatic total flooding C02 system.~

' e ~ accept the licensee's propos'al on the stairwell without the automatic gas W

system provided the redundant cables.in the. stairwell are protected by a two

.hourfenclosure encompassing.each division. Fire detection should be provided

' n each enclosure'with separate annunciation in the control room.

i Th'e areasiprotected bycgas suppression systems are designed for 5% Halon-1301 concentration with.as soak time of.10 minutes. - The. system is actuated auto-matically,by' a detectton system in each area and is backed up by manual sactuated-carbon-. dioxide. systems for each area. : The. systems are designed to 1 maintain.a 50% concentration ~ for-10 minutes.

-The -licensee' has demonstrated to the NRC that alternate shutdown exists from theicable-vaults'.._ Sincelthis has been done',cwe recommend that the staff

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Laccept the 5% Halon concentration for a 10 minute soak time.- The 'NRC.is also

. requiring. the license _e to providelalternate shutdown for the inner and outer

'cablelspreading' areas.- Shenithis requirement has been fulfilled, we recommend.

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that:thelstaff'acceptLthe 5% Halon concentration for a 10 minute soak time.

>Th(automatic ; total; flooding carbon dioxide systems for the containment -Spray.

Pump rooms tare. acceptable.

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! Based :uponithe 'above~ review we find' 3.1.3 Gas' Suppression Systems' satisfactory -

'and we:recommcad that this itea:be, accepted by the staff.-

Item 3.1.4-TWater Suppression System The SER states that:

d 11.1 n: automatically ~ actuated water curtain will be provided ;to protect the.

= diesel generator air intake.

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'2.- (An automatic directed water spray system willabe installed over the Ediesel-driven { fire pump and day-tank.

The area will be curbed and drains provided.to a' separator..

3.

The turbine building' sprinkler system-will. be extended to cover the track-way.at the north and south end of the building.

4.. - Automatic fire suppression systems will.be installed in the areas of the

= remote shutdown. panels,- auxiliary feed pumps, and component cooling water

-pumps..

The-licensee on October 31, 1979 submitted design information on.3.1.4, Water Suppression Systems. The areas included in this submittal include-(1) water curtai.n for.~ diesel generator air intakes, (2) water spray system for diesel fire pump,land (3) sprinkler system for trackways in turbine building.

=1..The water curtain designs protecting the diesel generator air intakes are acceptable providing the systems. are deluge systems automatically actuated

.by a' detection: system.

2.

The following are recommendations on the automatic water spray system for

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the diesel. fire pump. We recommend that upon implementation of these

' recommendations, the staff accept the water spray system.-

'a.- ~ Heat collectors should be provided for all.the detectors. The purpose of-the collectors'isl that the products of combination will collect at s

the detectors and therefore give ~a faster re'ponse.

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b. - The water; feed for the system should'be connected on the system side

-.oflthe pump isolation valves'.. The reason for-this is that. if. the pump lis isolated from the: system for. maintenance work and.a fire breaks out cat the! pump area,.the sprinklers will come on and extinguish the fire.

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' c.. :The ' density -was not?notedL in the_ licens'ee's: submittal; in accordance

with NFPA 15 paragraph 4-4~.2.2, a density of 0.5 : gallon per minute' per isquare. foot should be provided for the projected surface area..NFPA 15Eparagraph' 4-4.2.2' reads asi follows " Nozzles shall be installed to

. impinge on the. areas'-Lof the source of, fire, and where spills may-travel 'or accumulate. - The water application rate on' the probable; sur-face:of! the' spill _.shall be at the rate of not less'than 0.50 gpm per

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- di r [The~ remote actuator for the deluge: valve-should'be provided at the

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ehtrance to1the? crib house: inner room. so that the system can be oper-m ated withoutL thef necessity of= thef operator-going-into the pump room where the fire is11n' progress.

3.; rThs(turbine? building lsprinklerisystem extension for the protection of the

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north an~d southitrackways is acceptable..

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JThellicensee has provided-local' automatic application carbon dioxide systems Efor the protection'of. the auxiliary feed' pumps-and component ; cooling water pumps 11nsteadfof-the. requested. water suppression system; The staff has re -

quired

the: licensee toJprovide-: alternate shutdcwn from these areas. Based'on

this ' requirement the loca11 application l carbon dioxide system is acceptable.

The. licensee.did nct submit design details for tim suppression system to pro-tectTthe! re' mote-shutdown panels.- We ' recommend that the staff require cable

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trayLbarriers'and area automatic sprinkler protection be provided if alternate-1shutdowa is.not.availabletoutside this area.

'WeRfurther recommend that-the details o'f the protection of the remote shutdown panelsebe: reviewed byJNRC.

Based upon1the:above review we find 3.'1.4,1 Water Suppression Systems, satis-factoryf and we recommend that the staff accept this~ item.

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! Item 3.1'.5 - Fire Water-System' This item was: addressed :in our submittal to you on December 28, 1979. At that

. time the-concern was the leak detection system.

A review of the fcurrent concer.i of Item 3.1.5 was 'not originally called for in

.the"SER.

!Thellicenseeis;proposingtoiinstallaSquareDCatalog#9001KYC-6,JU.L.

. Guide #NFCR File E 42259. We have' checked the UL listing and FM approval 2

. guide forifire pump; controllers and this unit is.not listed. We recommend

..that the: staff 1 require ^that.this 1.ensee install an approved fire pump con-

' troller thateisfin'accordance with JFPA approval guide and UL. listing.

LThs: licensee'shletter.of;0ctober 31,1979; indicates that the control room will have the ability.to start' and'stop the fire pump. ' Paragraph 7-5.2.3 of NFPA 1

' 20: states'When additional? control stations _for causing nonautomatic con-

tinuous; operation of:the pumping unit, independent of the pressure. actuated

switch, arciprovided atilocations' remote from.the controller, such stations-shall'not.beioperable to stop the motor." -We recommend that' the staff request:

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1 nthatithelstop; switch :for the fire pump be disconnected _in the control room.

We recommend th' t.the staff reject-this : item.

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