ML20091C247

Engineering Assessment Turbine Bldg Fire Area Ie,Ja Fitzpatrick Nuclear Power Plant

ML20091C247
Person / Time
Site:	FitzPatrick
Issue date:	07/30/1991
From:	POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:
Shared Package
ML20091C245	List: JAFP-91-0455, Forwards Engineering Assessment Turbine Bldg Fire Area IE Ja Fitzpatrick Nuclear Power Plant, to Support App R Exemption for area-wide Detection in Turbine Bldg ML20091C247
References
NUDOCS 9108060105
Download: ML20091C247 (10)

Text

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1 ENGINEERING ASSESSMENT TURBINE BUILDING FIRE AREA IE JAMES A. FITZPATRICK NUCLEAR POWER PLANT I

NEW YORK POWER AUTHORITY l

l Evaluation No:

Date Prepared:  ! '>d .I A Prep ed by:

r T. 4 C L -( {L . j J t d <!,/ o

(- Revieued by: hkrYk fhlr$b> & b;r E EO /chn k}r /

l FuuvM mbe of, ciet of Fire Protection Engineers Approved by: J { -

m/ / SJ, r ~ ~ r,n 4:-

9 L

tRS2268REA85NA2 F.

ls

s, ENGINEERING ASSESSMENT TURBINE BUILDING FIRE AREA IE APPENDIX R DETECTION AND SUPPRESSION 1.0 PURPOSE This engineering assessment will examine the adequacy of the existing fire detection and suppression capabilities in Turbine Building (Fire Area IE) necessary to assure the avzid!/..4.ty J of Appendix R hot and/or cold shutdown chpdisa & .

2.0 a tNhor:.*M

1. 2RC TJene' c Letter 86-10 " Implementation of Fire Protection Requirementc" dated April 24, 1986.

2. James A. FitzPatrick Huclear Power P16nt Fire Hazards '

Analysis revised October 1985.

3. James A. FitzPatrick Nuclear Power Plant Evaluation of ,

the Compliance to Appendix R Section III.G. October 1985. I

4. Minor Modification Package M1-91-179, " Isolation of UC-  ;

16A and 16B Fans."  ;

5. NYPA letter, J.P.Bayne to H.R. Denton, dated July 13, 1982 (J PN-8 2 -061) submits "A Reassessment of Conformance to Appendix R." This report supersedes Appendix II to the Safe Shutdown Analysis in its entirety.

6. NRC 2/2/83 letter ([[::JAF-83-44|JAF-83-44]]) D.B. Vassallo to L.W.Sinclair, regarding draft safety evaluation on Appendix R exemption requests. Letter requests that the Authority review the draf t report for technical accuracy and inform the PRC of any corrections necessary within three weeks. The draft report recommends the denial of exemptions for four zoneu in the reactor building while granting exemptions for five other areas.

7. NRC 7/1/83 ([[::JAF-83-235|JAF-83-235]]) letter, D.B. Vassallo to J.P.

Bayne, regarding exemption requests - 10 CFR 50.48 Fire Protection and Appendix R to 10 CFR 50. Transmits NRC Exemption for the Control Room and Torus Room in response to the Authority's request.

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3.0 INTRODUCTION

i Calculations performed to predict the temperaturo in the East l

Electric Bays indicate that if power to the and West ventilation fana la lost, temperatures could exceed

, 150 degrees F. Ilowever, these calculations are based on " worst-l case" assumptions (i.e. hottest day, maximum solar heat load, water

" operating" heat loads, 80 degree F lake normal The ability of all equipment in the temperature, etc.). 1 electric bays to oporate at those temperatures Calculations using more cannot realistic be assured at this time.

assumptions may render this modification unnecessary for either hot and/or cold shutdown conformance strategios.

l I Equipmont in the bays is required to shutdown the plant in the event of a firo. A fire in either the Control Room or Turbino Building could damage electrical cables " associated" with the electric bay fans. As a result, the Authority modified the electrical circuitry associated with those fans to assure their availability in the event of a fire.

Panels 6711V-2A and 6711V-2B provided local control of Electric Bay f ans 67F11-16Al and 67Fli-16A2 and 67F13-16B1 and 67F11-16B2 respectively. In the ovent of a fire in Fire Area VII (Control Room, Relay Room or Cable Spreading Room) prior to the modifications, a short circuit in the annunciator and

' light circuit for fans 67 Fli- 16 B1, 67 Fil- 16 B2 , 67 Fli-16 Al A13D 67F11-16A2 could blow the control power fuses and cause the fan to be inoperable. Without an operable f an, the temperature in  !

the electric bay will increase and may cause the equipment in the bay to potentially overheat and fail.

A fire in the Turbine Building (Fire Area 1E) could damage two local control panols (6711V-2A and 6711V-2B) , which could result in electric bay f ans 67F13-16A1, 67Fli-16A2, 67Fil-1681 Af1D 67Fli-16B2 being made inoperable and overheating electric bay equipment.

To assure that fans will function in the event of fire in either the Control Room or Turbine Building, modification M1-91-179 (Reference 4) eliminated all control of Electric Bay Ventilation fans 67 Fli-16B1 and 67Fil-16B2 from the Control Room, and 67Fli-16Al and 67Fli-16A2 from the local area.

4.0 ANALYSIS 4.1 Apolicable Regulatory Criteria Apnendix R to 10CJ3110 Section III.G 3 of Appendix R to 10CFR50 requires detection and fixed suppression in locations where alternato capability is provided to ensure safe shutdown capability prior to the transition to cold shutdown.

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Prior to the modification of the electric bay ventilation system circuitry (Referenco 4), the Authority rolled upon circuit separation. With the installation of this modification, FitzPatrick now falls within the provisions of Section III.G.3 and III.L of Appendix R to 10CFRSO based on the assumption that electric bay ventilation is required prior to the transition to cold shutdown.

Section III.G.3 requires that detection and fixed suppression be installed in areas, rooms, or zones where alternato shutdown capability is required. As outlined in Generic Lotter 86-10 (Reference 1), loss than total detection and total supprossion in the area, room, or zone can be adequato if justified by analysis; however, if either no detection or no supprossion is provided in the location under considoration, an exemption is required.

4.2 Assessment of Turb_inq_ittildina (Firo Area IE)

The equipment for which alternativo shutdown capability is provided, given a fire in Fire Area IE, consists of local control panels 671tv-2A and 6711V-2B located along column line 19 on the outsido of the north wall of the Electric Bays.

The immediato vicinity of ventilation equipment betwoon columns 19-20/A-B without detection or supprossion contains negligible quantition of exposed combustible material. A small caged area is used to store radioactivo materials, primarily noncombustible material. An approved flammablo liquids storage cabinet is also in this location. Thoro are no other potential. sourcoc of combustible materials within those column linos. The modifications described in Referenco 4 did not introduce any additional combustible materials into the location of concern.

Thorofore, the location contains minimal quantities of exposed combustible material, and the probability of damage due to a fire either starting in or spreading to this location is considered highly unlikely.

The existing configuration of firo protection features in Fire Area IE are documented in Reference 2. The immediato vicinity of ventilation equipment betwoon column lines 19-20/Al-B contains no detection or suppression capabilities. Open areas of elevation 272'-0" which can present an exposure fire hazard to the location of concern are protected by automatic sprinklers. Automatic detection is not provided in the open areas of elevation 272'-0" which can present an exposure fire hazard to the location of concern. Potential fire scenarios involving exposed combustible materials in those adjacent locations would result in supprossion system actuation.

Sprinkler system water flow would result in a local alarm and an alarm in the Main Control Room, resulting in dispatch of the fire brigado. Supprossion system actuation would act to control and/or extinguish the fire prior to arrival of the fire brigade.

Pacto 4 of 6

4 The existing configuration of automatic detection and suppression in Turbine Building Fire Area IE in order to support conformance with Appendix R Section III.G.3 is

, acceptable "as is". The bases for this assessment are a ccabination of the fire hazards in the location of concern, existing protection provided for exposure fire hazards, and the ability to establish ventilation to the East or West ,

Electric Bays independent of the location of_ concern. Even should damage occur, there will be no impact on safa shutdown capability since the modification described in Reference 4 ensures the availability of ventilation to the East Electric Bay, which is associated with the Main Control Room shutdown path. ,

4 4.3 bggessment of Control Room (Fire Area VII)

An exemption has been granted for the lack of Hain Control  :

Room detection and suppression under III.G.3 alternate '

shutdown criteria (Reference 5,6 and 7). Therefore, further review of the Main control Room is not required. i

- 5.0 CONCLUS20N Based on the results of the preceding assessment, the existing configuration of fire protection' features provides adequate protection for the location of concern. The bases for this conclusion are summarized as follows:

. _There are minimal exposed combustible materials in l

the immediate vicinity; of the location of ventilation equipment for which alternative shutdown capability is provided.

. Adjacent locations on--elevation 272'-0" of Turbine Building Fire Area - IE that contain significant exposure fire hazards are protected by automatic wet pipe sprinkler systems.

l .

Actuation of suppression systems in adjacent

! locatio'is would act to control and/or extinguish I

postulated _ fires prior to arrival of the fire brigade.

• Due to the location and protection provided for exposed combustible materials, damage due to a fire occurring in or spreading to the location under

-consideration is considered to be highly unlikely. <

Even should fire damage occur in the location under consideration, there will be no impact on safe shutdown- capability since the availability of L ventilation to the East Electric Bay is provided l outside cf Turbine Building Fire Area IE.

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• Providing additional detection and/or suppression capabilities in the location under consideration does not result in a significant improvement to existing fire protection features.

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p Sheet 5 et 8 h rp MhA[ FIRE MA2ARD ANALYSIS S12t1 ART SHEET (Cont'd)

FRA Total

• Avail. _ Type of Fire Suppression ,

se Dwg Fire Fire Col. Plant Area safety Ares Quantity Loading TotalStu's Btu /Ft 2 pg,fyg t Primary Actuation Barkup Deterties

• h_te j IA.c. Identification Criteris Sq.Ft. Material Lb. Btu /Ft No. Area 2one El.

l 2,867 86,010 34.4s10' 86,010 153,990 Veter Manual Portable lontration 10 BR-4 272 12-D Battery SR 400 Cable SK2 IV bone CD Charging Roos . insulation station j q f

~, "% j 5 Wet Fusible Water Sprinkler 6 l 770 Lube oil 216,000 5.72s10 8 4.40 10' 5.72s10 [ SKI IE OR-1 252 13-B Turbine Oil NSR pipe link bose alare Room sprink. station ,

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{ 8 Wet Fusible Water Sprinkler 6 l 770 Lube oil 84,000 2.23:10* 1.72s108 2.23:10 A OR-2 ??2 13-K airbine Oil SK2 IE NSR pipe link bose alare I' Ron sprink. station i

400 107,368 11.8s10 8 107,368 12,632 Wet Fusible Water Spriekler

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SE2 IE OR-3 272 22-B Misc. Oil MSR 110 Misc. oil pipe link base alors Storage sprink. station 14,000 232,783 391stk' 31,081 208,919 Wet Fusible Water Sprinkler $

SKI IE TB-1 252 16-T Turbine Bldg NSR 1,6ho Resia 8 pipe tank bose etern l \\ 54,000 Cable *21,532 12,785 690s10 l

(TB-It) insulation station I

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I,400 Lube oil 944 13,755 19.3x10 8 sprink.

i 540 Lube oil 1.c80 40,800 22:10 8 '

- 2,062 Lnbe oil 14,400 142,464 294 10' 0 26,465 5.88s10*

' .} 9 /!J 222 Lrabe oil 288

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' /~[. ry)k,C 1 V 32.,000 256s10_s 400. M _640,00_0.. -

8, 24.942 215,058 Wet Fusible Water Sprinkler TB-1 272 t6-T Turbine Bldg NSR 53,600 Lube ot! 44,504 9,964 534x10 8 bose alare 16 9

SE2 ,lE link

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pipe (r (TB-12) 53,600 Cable 59,655 13,356 716:10 8 1320 179,520 26.9s10 8 sprink. station 150 Misc oil L

500 Wood 3000 48,000 24s10' 300 Plastic 3000 10,345 36sI0 8 8 2,184 237,816 Water Man aa l Water Elec. MAD 7 -

-.S IE TB-1 300 16-T Turbine Bldg MSR - 679 Lubc Til 336 10,095 6.85 10 spray bos.sta.

7 f' K3 op. Floor t.36 Cable 9,186 168,035 IlonIDs (TB-13) insutstion

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FIRE MAZARD ANALYSIS

SUMMARY

SNEET (Cont'd) ,

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• Avail. Type of Fire Surpreselee FMA Quantity Imading Total Total ine Dw Col. Plant Area Safety Ares Lb. Btu /Ft' Btu's 8tu/Ft 2 Ptu/Ft 2 Primary Actuation Backup Detection ** Tote

6. % .sAres YireZoneFireEl. tec. Identiferation Criterie Sq.ft. Material Elec. IIAD/ Wat.bos. Fome

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108,000 333,818 2.2x10' 333,818 Air TB-1 244 16-T Condenser Pit NSR 6,600 Lube oil f aae . emenal station alsru g,

% SKI IE ,

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, (78-14 ( . ,

73,199 390x10 8 73,199 166,801 Preact. Elec. MAD / Water Sprinkler 5,330 Imbe oil 19,125 sprink. fue. link bos.sta. e tars & (N 5 SK3 VIII IlG-1 300 6-T Motor Gen.Roon NSR

-8 2,619 2.23 10* 7,104 232,896 Water flanual Portable Ionization 891 Lebe oil 114 & elect. RAD 6 SK4 Ill SP-1 255 24-A Safety Related SR 334 75.423 4.0x10 8 hos.sta. CO Pumps 53 Cable 1,703 2.33 10' 5,412 234,588 Weter Manual Portable Ioetrets a 511 XIII SP-2 255 26-A Safety Related SR 1,310 Imbe ett 114 bos.ste. Con I" *Iett MAD 7

53 Cable 405 91,671 4.86ml0*

Pumps insulation 1,439 2.0 10* 1,439 238,561 Water Manuel Portable Iceinstion RSR 1,390 Peper,etc. 250 CO2 8 SKI IB CR-2 284 24-C Radwaste has.sta.

Control Room 8, s 6,189 233,811 Water Manual Portable None RW-1 250 25-N Radvaste aldg PSR 16,400 Cable 6,260 5,217 75.lslo hos.ste. CD: 16 9 SKI IB insulation 60 Reste 500 232,783 14.0m10e 24,273 215,727 Wet Tusib'.e Water Sprinkler 9

!:W-1 272 25C Radweste Bldg NSR 9,910 Cable 9,152 11.082 110:10' pipe link base alarm O SK2 IB Baler Area, station 100 Papers, 200 16,000 1.6 10 8 Laundry Area rage, etc. 8, 1,580 Clothes 10,525 53,291 84.2x10' 16 8

1,250 Resin 500 11.174 14.0x10 1,580 Rubber 1,600 19,595 31.0x10e 69,013 170,987 Water Manual Portable None NSR 108 Cable 3,286 365,156 39.4x10e hose CI7

,1 SKI IB SH-13 235 23-5 Cire. Water insulation (5H-11) Pumps Pat 29,178 28.9mlo e station 990 Lube ott 1,416 3.150 237,450 Water Manual Portable h e MSR 14,900 Cable 3,150 3,812 46.9x10' hose CO

.*2 SKl IB S11-13 260 27-S Screenwell (SH-12) House insulation station l 7.1-8 h- - _ _

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