ML20101G047

Rev 3 to Calculation 2-FP-0085 Raceway & Firezone R Cable Supports Analysis

ML20101G047
Person / Time
Site:	Comanche Peak
Issue date:	06/17/1992
From:	STONE & WEBSTER ENGINEERING CORP.
To:
Shared Package
ML20101G029	List: ML20101G024 ML20101G047
References
2-FP-0085, 2-FP-0085-R03, 2-FP-85, 2-FP-85-R3, NUDOCS 9206250270
Download: ML20101G047 (49)

Text

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FIGURE 7.1 2EP-& Os

! REVISION 3 CALCULATION TITLE PAGE PAGE 1 OF 1 4

PAGE11

{ TEXAS UTIUTIES ELECTRIC CO. / CPSES UNIT 2 TOTAL NO. OF PAGES M CALCULATION TITLE (Indicattve of the Objective): i CALCULATION CLASStFICATIONS:

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C A6 LE S UPPORTS ArdALY S1.5 l I c: NON SAFETY I

CALCULATION IDENTIFICATION ORGANIZATION:  ; CALCULATION NUMBER iTYPE NUMBER SWEC i r:PT L l-FP-CD85 WPST NUMBER t COMPUTER OUTPUT SYSTEM /SUB-SYSTEM

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STONE & WEBSTER ENGINEERING CORPORATION O REVIEW STATEMENT FOR CALCULATIONS CALCULATCN IDENTIFICATCN NUMBER t P ACE 1 l CALCULATICN NG AEYtS C N hcl  ! CALC. CHANGE NCmCE NCL

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1) UNE BY UNE REYlEW ASSUMPTIONS TO ASSURE THElR VAUOffY AND NEED FOR LATER S)

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2 FP 0085,-Rev.- 1 Page 4 of 40-TABLE OF CONTENTS SECTION PAGE TITLE PAGE 1 COMPUTER OUTPUT / CROSS REFERENCE 2 REVIEW STATEMENT FOR CALCULATION 3 TABLE OF CONTENTS 4

1.0 INTRODUCTION

5 2.0 DEFINITIONS 5 3.0 ASSUMPTIONS 8 4.0 METHODOLOGY 9 5.0 DESIGN INPUTS / REFERENCES 10 6.0 RESULTS 12 ATTACHMENT A - RACEWAY SUPPORT ANALYSIS MATRIX Al-A5 ATTACHMENT B-- FIRE SEVERITY EXPECTED BY OCCUPANCY B1 ATTACHMENT C - FIRE SEVERITY TIME --TEMPERATURE CURVE Cl ATTACHMENT D - DERIVATION OF THE MAXIMUM HEAT RELEASE RATE D1-D2-

2 FP 0085,-Rev. 1 Page 5 of 40

1.0 INTRODUCTION

1.1 The Unit 2 Fire _ Safe Shutdown Analysis (Ref. 5.1) and Physical Separation Analysis (Ref. 5.2) establish the electrical raceways requiring a one-hour fire-rated barrier (i.e. Thermo-Lag 3301 System) to meet the. separation requirements of DBD-ME-020 (Ref.

5.3). -In some instances, one-hour fire rated cable (Firezone R cable) is credited to meet separation requiremerts. .The purpose of this evaluation is to assess the ability-of-supports associated with Thermo Lagged raceways and the-support mechanisms associated with Firetone R (FZR) cable to withstand the effects of a design basis fire as postulated by the Fire Hazards Analysis.

1.2 This evaluation is based on the provision of NRC Ceneric Letter 86-lu (7.ef. 5.4) whereby licensees may analyze the fire loading and automatic fire suppression system capability in given plant areas to determine if fire barrier material application e' raceway-(and one-hour fire-rated ~ cable) supports is required.

1.3 Raceways protected with Thermo-Lag include both cable tray and -

conduit systems. The Thermo-Lag installation on raceway supports extends a distance of 9" (min.) to-11" (max.) as measured frem the outside of the raceway protective envelope (Ref. 5.5).

- Tt 3 remaining portions of supports for Thermo-Lagged raceways s exposed.

1.4 FZR cable is primarily installed in cable trays. FZR cable has been qualified for a one-hour fire endurance-rating (Ref.-5.6),

however the cable trays and associated tray supports are exposed.

Similarly, for the minor amount of FZR cable-installed in free air, the associated support assemblies (clamps, tube tracks, etc.)-

are also exposed.

1.5 Sprinkler system coverage is provided in all areas where Thermo-Lag barriers and FZR cables are located except the six (6) firezones-identified in Attachment.A._ These firezones are evaluated in detail in Section 6.0 Sprinkler systems are installed in accordance with NFPA 13 (Ref. 5.16), such that sprinkler heads positioned at the ceiling and under obstructions ensure full spray.

coverage throu Additionally, gh-out the respective room and/or Firezone. sprinkler protection for congested ca is provided in accordance with American Nuclear Insurers' criteria (Ref. 5.16). Sprinkler system-hydraulic designs are conservative and consider the occupancy hazards of each protected area.

Therefore, the cooling ef'fects of sprinkler system spray coverage -

-for cable trays and associated supports will maintain design basis fire temperatures well below the critical temperature of steel as described in Sections 2.3 and 3.9.

2.0 DEFINITIONS

• 2.1 Combustible' Loading

'The total heat release of an area, in Britisn Thermal Units (BTU's) of in-situ combustibles, divided by. the square feet-of the:

area to give a BTU /Sq. FT. rating b . _ _ - _ _ _ _ _ _ _ . . _ _

I 2-FP-0085,.Rev. 1.

Page 6-of 40 1 2.2 conttalled Storage Area Rooms where Class A combustible' material (wood, paper, cardboard, cloth, ete') can be utilized without com

. -All ,

other classes of combustible materials (pensatory measures. oils, paints, solvents, plastic, rubber, etc.) require compensatory measures when left-unattended. In no case shall any class of combustible materials be stored under cable trays which are protected by a fire barrier such as Thermo-Lag -(Ref. 3.7) .

2.3 Oritical Temperature The critical temperature for steel is normally considered to be 1100*F. At this temperature, the steel loses sufficient strength to reduce-the yield stress to the value' commonly used for the working stress design. Consequently, the load carrying capacity is reduced to approximately the design load capacity. The temperature of 1100*F is, therefore, considered to be the-approximate failure temperature of-steel. This is consistent with-the AISC guidelines which are utilized in the design for the cable trays and supports (Ref. 5.8 through 5.10). 3 2.4 Fire Protection Insta11ation Release The Fire Protection Installation Release (FPIR) is the site document for authorizing the installation of Thermo-Lag material on electrical raceways. The use of this form is controlled by Construction / Quality procedure CQP-CV 107-(Ref. 5.11),

i 2.5 Fire Area A fire area is that portion of a building or plant that is separated from other fire areas by fire barriers (walls, floors or roofs) with openings and penetrations protected by seals or closures having a fire resistance rating at least equal to the '

rating assigned to the barrier. The fire areas may extend through more than one elevation.

L 2.6 Fire Severity / Fire Duration l

The approximate time, expressed in minutes, that combustible material will burn. The duration is based on the heat release.

that will produce an expcaure equivalent to the Standard Time-Tempete re Curve ("E" Curve) or, in some instances, the "C" curve '

i. where justification is provided (Ref. 5.12) .

2.7 Fire Zone A subdivision of a Fire Area that may or may not have ratedi l l boundaries.

'- 2.8 Fire Zone R Cable i

-Fire resistent cable which has been qualified to remain functionci l by a one-hour fire endurance test in accordance with the Standard-Time Temperature Curve ("E" Curve), (Ref. 5.12). The cable-is:

constructed of a continuously welded corrugated 12 mil thick stainless steel sheath with high temperature nickel-clad copper; l

conductors, glass braid cable jacket and.a 600 V composite 1

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- 2 FP 0085, Rev. 1-

Page 7 of 49-insulation consisting of silicone rubber. mica and ceramic tape.

This cable will be used in power and control circuits for fire safe shutdown applications. This cable-is predom nately-installed i in cable trays with a minor amount supported-in I se air.

j' '2 . 9 in situ Combustibles ,

combustible materials which are permanently installed (i.e.,

exposed cabling. fire hose, cloth, etc.).

2.10 Maximum Permisrible Fire Load (MPFL)

The maximum permissible fire loading (MPFL) is the maximum fire -

loading (Btu /sq. ft.)-which can be expected to be contained within a fire area by the fire area boundaries without compromising. safe shutdown capability. It represents the maximum loading which can be substantiated by -an engineering evaluation to justify -that safe:

shutdown capability will not be compromised during a fire event.

Iu is calculated by analyzing both the fire area boundary and the fire protection features provided for protection of redundant safe ,

shutdown equipment.. Each area of concern identified in the-analysis is reviewed and the most restrictive of all the features ,

.is then used to assign the MPFL, For example: If a fire area has boundaries which are capable of containing a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire,'but also has redundant safe shutdown equipment pro **cted by 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> barriers, the FPFL for that. area would be 80,000 htu/sq. ft.. or 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

2.11 No Storage Area Rooms rLat require compensatory measures whenever-transient-combuscibles-are brought into them. These rooms are designated as "No Storage Areas" based on deviations in the Fire Protection Report. Partial Sprinkler Coverage Evaluation, Cable Tray Hanger Analysis, Commitments, and areas where a high fire load already exists (Ref. 5.7).

2.12 Storage Any transient combustible left unattended.

2.13 Thermo-Lag A Thermal Science, Inc. (TSI). protective barrier envelope which, as used at Comanche Peak Steam Electric Station (CPSES), consists of Thermo-Lag Stress Skin Type 330-69 and Thermo-Lag 330-1 Subliming Material designed and installed to-provide a one hour rated fire barrier system. (Ref. 5.5) 2,14 Transient combustiblac Combustible materialt ha. r.re not designed into the plant, but are brought into the p. ant ue-to operation, maintenance, or plant modification activities.

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4 2 FP-0085, Rev. 1~

Page 8 of 40 2.35 The following are defined from a combustible loading standpoint only:

ANTI-C STATION Wheeled storage units which store anti-contamination clothing and equipment. Total weight of combustibles in a typical atation is approximately 210 lbs, for 1 cabinet and 365 lbs. plus 9 cubic feet of wood benches for 2 cabinet. For the 1 cabinet'statiot, 45% of the combustible loading is ordint.ry combustibles such as cloth coveralls; liners. hoods, and lab coats, cardboard boxes and v rolls of masking tapes. 55% of the combustible load.ing is rubber and plastic gloves shoe covers and suite For a 2 cabinet arrangement,-the type of combustib'es it the same but 70% of the combustible loading is ordinary combustibles. Combustibles are stored on metal shelves in boxes or stored in well arranged stacks.

FRISKER STATION The total weight of combustibles in a typical Frisker Station is approximately 53 lbs. and-vinyl co cring for lead blankets. 70%

of the combustible loading is plastic bags and tags an6 30% is ordinary combustibles such as cloth, tape and paper sample smears.

RADIATION BAG DISPENSER A typical dispenser includes 4 rolls of plastic herculite and trash bags weighing approximately 35 lbs, per roll.

SPILL KIT GANG BOX A typical spill kit gang box consists of approximately 105 lbs of combustible, 65% of the combustible loading is rubber and plastic such as gogrles, squeegees, spray bottles, buckets, gloves she covers and ',ose.

h 35% is ordinary combustibles such as cloth mopheads, liners and decontaminated clothes, wood mop handles and clipboards, paper kay-drys and eample_ smears.

3.0 ASSUMPTIONS 3.x Two Design Basis Accidents (e.g., fire and seismic events)-do not occur simultaneously. Therefore, degradation of the: ability of caceway supports to withstand design basis saismic loads under fire conditions is acceptable (s*e- Ref. 5. 3) .

3.2 All raceways requiring Thermo-Lag are identified on M2-1700, Rev, CP-1; all Firezone R cables are identified in INDMS (Ref. 5.15) .

3.3 All Firezones where Thermo Lag is installed are identified on M2-1700 (Ref. 5.14).

3.4 All Firezones where Firetone R cable is installed are identified in INDMS (Ref. 5.15).

3.5 Sprinkler systems in the areas evaluated are designed and-installed in accordance with NFPA 13-(Ref. 5.16). Field walkdowns conducted in accordance with 2-EAP-016 (Ref. 5.17) provide assurance that this assumption is-valid.

L 2-FP 0085, Rev. 1 Page 9 of- 40 3.6 Protruding items (i.e., raceway supports, etc.) directly attached to a raceway requiring Thermo-bg. are protected with 9 inches minimum to 11 inches maximum of Thermo Lag. This assumption is based on the requirements of the Thermo Lag installation specification (Ref, 5.5) and. inherent quality controls therein.

3.7 The internal temperature of raceway support steel'is.the same as

• the ambient temperature. This introduces a safety factor into the evaluation because in actual fire conditions, steel takes a relatively long time for its internal temperature to reach ambient air temperature. Steel has a high thermal conductivity allowing it to transfer heat away from a localized heat source. This -

property.in con; unction with its thermal capacity enables. steel to act as a heat snnk.

3.8 Combustible loading for a given Firezone adequately represents combustible-loading for each. room within that-Firezone.

3.9 Cable trays, cable tray support materials, conduit, conduit support materials and FZR cable support materials-(other than-cable tray) are all composed of steel materials which satisfy pre.uiling CPSES criteria and requirements for safety related, Seismic Category I applications. References 5.8 through 5.10-provide source documents for traceability'to actual steel types and grades for raceways and supports.

' Example: For FZR cable free air supports, specification CPES S-2005 (Ref. 5.9) refers te-the "RC" series of details' provided in the PESD sheets-of drawing S2-0910.

Detail RC-2 specifies Unistrut P-2014 one hole clamps-

.(ASTM A-575) mounted to structure with A 36 plate steel and 1/4" diameter--HILTI-KWIK bolt.

The critical temperature of 1100*F for-all~ raceway and support materials is therefore acceptable based on review of the applicable reference documents.

3.10 The three Unit 2 Electrical-Switchgear Rooms (Fire Zones 2SD9, 2SE16 and 2SE18) containing 'Thermo-Lagged cables are protected by manually actuated sprinkler systems which provide full spray coverage throughout the respective area. .The-manual actuation is considered equivalent to automatic suppression in these areas due to complete ionization detection in the area,. low combustible loading, and the combustibles in the room being cables which are expected to result in.a slow developing-fire. Therefore, a Fire will be. detected in the incipient stages allowing for actuation of the system well before significant temperatures 1can be developed.

4.0 METHODOLOGY l I

4.1 The following: data will be compiled into Attachment A and assessed in Section 6 of this evaluation.-

A. Determine the Fire Areas, Fire zones and rooms-containing Thermo Lag and/or FZR cable based on1the FPIR's for Thermo-Lagged raceways (see definition 2.4) and applicable Design Change Authorizations for FZR cables (Ref. 5.20). Enter-z this.information into columns A, B and C in Attachment A, l

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! 2-FP 0085, Rev. 1 j Page 10 of 40 t

i B. Determine if the room contains Thermo Lag and/or FZR; cable - i

j. by entering "T" and/or "R" respectively in column D.

C. Determine if sprinkler coverage is provided for the rooms '

containing Thermo-Lag or FZR cable by reviewing' the Fire

Hazards Analysis (FHA) drawings (Ref. 5.21 through 5.25), or t l the Fire Protection system-layout drawings (Ref. 5.26 '

! throu h 5.39). Enter "yes" or "no" in column E of s Attac iment A. Follow the response with an "M" when the

! sprinkler system requires manual actuation (see assumption ,

i 4

3.10).

f D. Determine the MPFL (Ref. 5.18 and 5.19) and;the actual fire i loading, fire duration for time temperature curve E and the-l types of combustibles (Ref.-5.18 and 5.19). Enter this

! information into columns F, C, H and I in Attachment A; j Also determine the maximum temperature developed for an E-curve fire from Attachment C.

l

! E. Determine it the type and arrangement of combustibles and i the construction can qualify for the C curve- based on

! Attachment B, if Curve C can be utilized. provide 3 justification in section 6.0 and calculate the fire duration j for the Firezones that qualify for thenuse of Curve C. This-

is done by dividing the combustible loading of the Fire zone .

I by the maximum heat release rate delivered in Attachment D and multiply the result by 60 minutes. Determine the l

> maximum temperature-developed for a C curve fire'from l Attachment A. In column J of Attachment A, enter "NA" if the C curve does not apply- or enter the duration and maximum temperature developed if it does. apply.

l F. Where. Therr.o-Lag or FZR are installed in' rooms which have l

partial or no suppression system coverage ("No" in column E ,

Attachment A), the rooms shall be designated as "No Storage" areas (see Def; 2.11) and an "A" shall be entered in column-

[

K of Attachment A. Determine if Thermo-Lag'or FZR cable is-installed in rooms designated as "No Storage" -because a -

2 deviation _ exists to justify compliance with _20; foot . _

se cagaration les and com requireuents-onents (Ref. for -5.18 fire safe and 5.19). shutdown analysis Enter B" in=

column K for t ese rooms, ' If neither "A" ory"B"Lapply,

{ enter "NA" in column K.

t - . - _ . _

4.2 In Section 6.0,' evaluate the acceptability of the unprotectedi i steel supports in accordance with the guidance contained in p generic letter 86-10_(Ref. 5.4) utilizing the information accumulated with attachment A. The evaluation shall take into

! consideration combustible loading,' automatic _ suppression, administrative controls and-test information, 5.0 DESIGN INPUTS / REFERENCES i 5,1 2+ME-0282, Rev. O, " Unit 2 FireJSafe: Shutdown Analysis" l-5.2 2-ME-0279, Rev. O, ' _" Physical Separation Analysis Unit 2 and Unit 2 Cables:and Components in Coumon:

i Areas" i

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_.____...,..__..___..._ . . . _ . . _ _ . _ . _ . _ _ - _ _ _ _ _ _ . _ _ . . _ _.. _ _. _ .m 2 FP 0085, Rev. l' Page-11 of 40 5.3 DBD-ME 020, Rev. 2, ~" Fire Safe Shutdown Analysis" 5.4 NRC Generic Letter 86-10, Section 3.3.4 5.5 CPES-M 2032, Rev. 0,- " Procurement and Installation of Fire Barrier and Fireproofing Materials" 5.6 Underwriters Laboratories

• Report on Fire Resistant Cables" File R -109251 -Project 84NK2320, ,

dated April 10,.1984.

5.7 STA-729, Rev. 4,- " Control of Transient Combustibles, Ignition Sources and Fire Watches" 5,8 CPES-E-2004, Rev. 1, " Electrical Installation" 5.9- CPES-S-2005, Rev. 2,. " Electrical-Raceway installation"'

5.10 CPES-S-2006, Rev. 1 " Structural Steel" 5.11 -CQP-CV 107, Rev. O, " Application of Fire Barrier and Fireproofing Materials" 5.12 National Fire Protection Association-(NFPA) Handbook, 16th:

Edition, Section 7; 14th Edition, Section 14.

5.13 2-FP 0080, Rev, 0, " Unit 2 MPFL Non Rated Feature Analysis" 5.14 M2-1700, Rev. O, " Unit 2 Thermo-Lag and RES Schedule" 5.15 Unit.2 Integrated Nuclear Data Management System-(INDEMS) .Rev.

3.04.

5.16 DBD-ME-225,-Rev. 2, " Fire Suppression System" 5.17 2 EAP-016, Rev. O, " Engineering Assessment' Procedure Fire Protection Features Walkdown" 5.18 LDCR FP 92-002 Dated 3/31/92 to the CPSES Fire Protection-Report-(Added-Unit 2) a 5.19 CPSES Unit 1 Fire Protection Report, Rev. S-5.20 Firezone R Cable DCA's 97609 Rev. 2 _

97081 Rev. 2 95554 Rev. 1 97610 Rev. 0 97259 Rev. 2' 97611 Rev. 0 95975 Rev. 4 99744 Rev. 0 5.21 M2-1920, Sht.101, CP-1,: Fire Hazard Analysis Unit 2.' Containment and Safeguard- Buildings Plans at E1=. ' 790 -6 5.22 M2-1921, Sht. 01, CP-1,_-Fire Hazard Analysis - Unit'2, Containment and Safeguard Buildings 1 Plans at El. 808 -O' & 810'-6" i

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) 2 FP-0085, Rev. 1 Page 12 of 40-

5.23 M2-1922, Sht, 01, CP 1, Fire; Hazard Analysis --Unit'2, Containment

, and Safeguard Buildings-Plans at El. 831'-6" & 832'-6" 5.24 M2-1923, Sht. 01, CP-1, Fire-Hazard Analysis - Unit 2 Containment '

a and Safeguard Buildings Plans at=El. 852 -6" & 860'-0" 5.25 M2-1924, Sht. 01, CP 1, Fire Hazard Analysis - Unit 2, Containment and Safeguard Buildings Plans at El. 873 6" 5.26 DWG #-0099, R/10, Grinnell Fire Protection Systems, El 790t 6" 5.27 DWG u 0100, R/8, Grinnell Fire Protection Systems. El. 790'-6" 5.28 DWG a 0101, R/12, Grinnell Fire Protection Systems. El, 810'-6" 5.29 DWG #-0103, R/12, Grinnell Fire Protection Systems, El. 831'-6"~

5.30 DWG n-0106 R/10, Grinnell Fire Protection Systems, El. 852'-6" 5,31 DWG n-0106A, R/2, Grinnell Fire Protection Systems, El. 852'-6" 5.32 DWG # 0118 R/8, Grinnell Fire Protection Systems, El. 810'-6"~

5.33 DWG # 0130, R/9. Grinnell Fire Protection Ststems, El 831'-6" 5.34 DWG #-0134, R/8, Grinnell Fire Protection nystems,:El. 790'-6" 5.35 DWG #-0135, R/7, Grinnell Fire Protection Systems, El 790'-6" L 5.36 DWG p-0146, R/6, Grinnell Fire Protection Systems, El. 790'-6" 5.37 DWG n-0154, R/5, Grinnell Fire-Protection Systems, El. 790'-6" 5.38 DUC #-0183, R/5, Grinnell Fire Protection Systems, E1. 852'-6" .

5.39 DWG #-0184, R/5, Grinnell Fire Protection Systems, El. 852'-6" 6.0 RESULIS 6.1 JUSTIFICATION FOR UTILIZING C-CURVE l

The standard time temperature curve is utilized in developing the combustible loading duration. -This curve contemplates a, severe fire-exposure in a masonry walled, wood of1por and' roof building2 and' a ---

combustible loading 'of 200,000 BTU /FT to 400,000 BTU /FT .(Ref. 5.12).

As indicated in attachment A,- the combustible loading except in Fire zone 2SB8 is less than 80,000 BTU /FT2 and in.most2 cases much less. Fire zone. 2SB8 has a fire loading of 101,300 BTU /FT All areas'being.

evaluated in -this calculation easily qualify'for temperature-Curve C-which contemplates a moderately sever occupancy with well arranged a non combustible building and a fire loading between 100,000

-storagg,and BTU /FT 200,000 BTU /FT 2 (Ref. 5.12). Utilization of the ' C Curve preserves an acceptable safety factor and is-justified as follows:

1. Combustibles. consist of exposed-cables.: fire hose in cabinets, Frisker and-Anti-C Stations with minor amounts of lube-oils,--

grease and miscellaneous combustibles including.small quantities of combustibic and' flammable liquids in equipment or.in containers-in designated storage' areas'.

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! -2 FP-0085,-Rev. l-

!: -Page 13 of 40 i 2, combustibles are well arranged. Cables which represent the

! majority fire loading are in trays. :The'other combustibles are

associated with- the anti-contamination clothing,- frisker stations.,

the radiation bag dispensers and the spill kit gang boxes.

Storage is in boxes, dispensers or in stacks on-non-com'suscible j

shelves. Minor amounts of other combustibles including some flammable and combustible lube oils, grease and other liquids are either in equipment or stored in containers in designated storage j areas.

J l 3. There is no concentrated storage of combustibles as would be the I case in a warehouse occupancy.

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4 The buildings and areas within.the buildings being evaluated are 3 all fire resistive construction.

l 6.2 Underwriters Laboratories " Report on Fire Resistant Cables" (Ref. 5.6) describes the one hour Fire endurance testing performed for FZR cable.

Included-in this test were configurations of No. 14 and No. 6 AWG FZR power cables installed in exposed galvanized steel open ladder type i cable trays loaded with 41,5% fill of random lay " fuel loading" cables.

Since CPSES utilizes No. 8 AWG FZR cable (Ref. 5.8), the test l effectively-bounds the cable size installed in the plant. The " Fuel loading" cables consisted of power and control cables representative of those installed at CPSES (Ref. 5.6). The trapeze type supports associated with the tested cable tray configurations, which consisted of-1/2" diameter threaded steel rod with 4 x 3 x 1/2 inch steel angle, were protected with Zonolite Type MK-5 fireproofing material. As described in Section 1.4 of this evaluation, supports _ associated with FZR cable at CPSES are unprotected.. However, the type-and construction of the cable trays tested are consistent with cable trays containing FZR cable at CPSES, i.e., galvanized steel open-ladder design. For purposes of this evaluation, the following test report excerpt-is relevant:

"The profuse flaming and smoking of the Fuel loading cables continued throughout the Fire exposure test. At 40 min, it was noticed that the galvanized coatins on the cable trays and conduits was oxidized. During the-final 20 min of fire exposure .

the cable tray '

siderails bowed inward and several-of the cable tray rungs disengaged from the-cable tray siderails and-allowed-the fuel loading cables to deflect downward."

Based on the above test report, the.following conclusions can be reasonably drawn to substantiate unprotected support mechanisms'at CPSES:

a. The steel supporting elements associated with-Thermo-Lagged raceways and FZR cable-at CPSES (cable-trays, support channel and tube steel, base- plates, one -hole clamps , etc.)

are at-least as substantial as the No. 14 and 16-gauge steel comprising the siderails and laddor rungs which started to exhibit loss of structural integrity 40 minutes-into_the test,

b. The cable tray test configurations with " fuel loading" cable-fills of 41.5% conservatively represent a " worst case" challenge to exposed support material integrity. This is.

based on CPSES design limitations of-30% fill for power cables in tray and 40% for instrumentation and control' cable-

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1 2-FP 0085,.Rev. 1 Page 14 of 40 Y

i (Ref. 5.8). The exposure fire utilized in the test was 4

based on the standard temperature curve which is the most

severe, and the fuel loading cables experienced fully i developed flaming conditions. Additionally, typical plant support configurations would experience less severe exposure

]i conditions due to inherently lower combustible load I conditions (more closely represented by the E-119 "C" temperature curve - see Section 6.1) and the heat sink

effect of the plant concrete structure, t

c. It is not credible to postulate fully developed fire i conditions for a period of 40 minutes without either j sprinkler system activation or manual responso with hose

stations which would maintain support steel temperatures i below 1100*F. This is based on the provision of fire j detection capability in all plant areas with Thermo-Lagged I raceways and/or FZR cable.

1 j 6.3 SPRINKLER SYSTEM COOLING OF STEEL i .

1- The cooling effects of water and more appropriately water in spray form-

such as would be the case with water discharged from a sprinkler head, i has long been recognized (Ref. 5.12, Section 13, Chapter 1). A-4 sprinkler system designed in accordance with NFPA 13 requirements which 8

includes ceiling level suppression and obstruction level coverage (when ceiling sprinklers cannot provide complete coverage due to obstructions) -

- will provide an even distribution of water that will effectively provide i coverage for all objects in a protected area (Ref. 5.16).

j in addition to the inherently high latent heat of vaporization of water,

. the dynamics of sprinkler system discharge which promote cooling include i rapid air entrainment into the spray which removes heat and effectively-1 knocks down the hot gas layer resul' ting in rapid temperature reduction at ceiling levels. Therefore, sprinkler system discharge will provide-l adequate cooling of exposed raceway: support elements given a worst case situation involving support steel immersed in the bouyant hot gas layer

at the ceiling level i

! Sprinkler systems at CPSES optimize coverage to obtain: maximum cooling effect from the sprinkler system. They have been designed and installed l

j in accordance with NFPA 13 and system walkdowns-have been conducted-for-

verification. Also, the ceiling and obstruction. level coverage required by NFPA has been augmented by special- application spray nozzles at congested cable tray locations to provide-an extra' level of_ protection 2 and cooling in these areas -(Refi 5;

26 through 5.39),

i An additional feature which helps to-optimize the coolink effect of.

! water spray is that the occupancies of the areas where Thermo-Lag and-i-- FZR Cables are installed are such that a fire would be slow developing

and would not have a high velocity fire plume. -As a result the

discharged water will be able to penetrate effectively to1 reach the fire i origin.

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l 2-FP 0085, Rev. 1 Page 15 of 40 1

J 6.4 RESULTS FOR INDIVIDUAL FIRE ZONES 6.4.1 FIRE ZONE AA 21a 6,4.1.1 General i

Firezone AA 21a is located on the 790' - 6" Elevation of the Auxiliary Building. There are 22 rooms in the fire zone, 5 of which contain Unit 2 Thermo Lag or FZR cable (Rooms X 165, X-172, X-173, X-174 and X-180). Of the 5 rooms only room X 180 has complete automatic sprinkler protection. The combustible loading for the zone is 10,500 BTU /FT and the fire duration utilizing the C Curve (see 6.1) is 11 minutes with a minimum 2 temperature of 760*F. The MPFL is reduced to 37,300 BTU /FT due to the non sprinklered rooms and the nonsprinklered rooms will be designated as "no storage" (Ref. 5.7) 6.4.1.2 Discussion l Room X-165 is a 911 ft2 room with a combustible loading consisting of a minor amount of exposed cables, paper and plastic. There is no equipment in the area which contributes significantly to combustible loading. There is no sprinkler protection for the

! room so it will be designated as a "no storage" room. Ionization detection is provided and manual suppression capability with hose stations and portable extinguishers is provided.

Room X-172 is a 150 ft2 room with a combustible loading consisting of only a minor amount of cables. There is no equipment in the area which contributes significantly to combustible loading.

There is no sprinkler protection for the room so it will be designated as "no storage". Ionization detection is being added to this room via a Design Modification (DM)4 Manual suppression capability with hose stations and portable extinguishers is provided.

Room X-173 is a 100 ft2 room with a combustible loading consisting of a minor amount of exposed cables. There is no equipment in the area which contributes significantly to combustible loading.

There is no sprinkler protection for the room so it will be designated as "no storage". Ionization detection is being added to this room via a Design Modification (DM)$ Manual suppression capability with hose stations and portable extinguishers is-provided I Room X-174 is a 4694 ft2 roca with a combustible loading consisting of exposed cables, hire hose in cabinets and a radiation bag dispenser. There is no equipment which contributes significently tc the combustible loading. There is no sprinkler protection for the room and it has been designated "no storage" .4 for Unit 1 operation. It will also be designated "no storage" for l Unit 2 operation. Ionization detection is provided for the room  ;

and manual suppression capability with-portable extinguishers and '

hose stations is provided.

Room X-180 is the 3456 ft2 main corridor. With a combustible loading consisting of exposed cables, a frisker station, anti-contamination clothing and a spill kit gang box. The corridor has complete automatic sprinkler protection with ceiling level,

• CONFIRM ATiorJ RE GtulRED FOR DE.stG rJ MODiF n CNTIOlsl TO ADD DETECTIOtJ l

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2 FP-0085 Rev. 1 Page 16 of 40 obstruction level and cable tray coverage. Ionization detection is provided and manual suppression capability with portable-extinguishers and hose station is provided 6.4.1.3 gesults Room X-165. X-172. X-173 and X 174 Thermo-Lag and cable trays which support FZR cables are not required to be protected based on the following:

1. The combustible loading is low to very low in these areasi The fire duration is no more than 11 minutes on the C Curve and the maximum temperature developed is 760*F which is well below the 1100*F critical temperature for steel, Also the arrangement of the combustibles and the lack of congested storage is not conducive to an intense, fast developing fire.

2. There is no sprinkler protection, but the addit _on of sprinkler protection would not substantially affect the ability of the supports to withstand a desian basis fire due to the low severity and' duration of a fire In these rooms.

Ionization detection is provided throughout and manual suppression capability is provided by hose stations and portable extinguishers.

3. There are administrative controls for the combustibles'in these rooms:

a. The rooms are designated "no-storage"

b. Additional margin of safepy is provided by limiting the MPFL to 37,300 BTU /FT

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until the steel was subjected to much higher temperatures for a much longer _

time than could occur with a fire in these rooms (See Section 6.2),

Room X-180 Thermo-Lag and cable trays =which support 1FZR cables are not-required to be protected based on the following:

1. Although=the combustible loading in Room X-180 could be as much as 30% to 40% higher than the overall: loading for the fire zone, it would still not produce-critical temperatures because over half of the- combustibles would have to be in the room before a C-Curve fire could reach the critical temperature of steel if allowed to burn freely without suppression being utili =d. .Also the arrangement and type of cosbustibles, predominately electrical cables in trays and ordinary combustibles and plastics well1 arranged-in rolls, dispensers,-boxes and on non combustible shelves, is more-conducive to a slow developing or smoldering fire which would be detected early and at relatively low temperatures.

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b 2 FP 0085, Rev. 1-Page 17 of=40-

-2. .There is complete automatic.-sprinkler protection-in the--room

' (see Section 1,5). There is also ionization detection throughout and manual suppression capability is provided by.

hose stations and portable extinguishers,

3. Thereareadministrativecontrolsonthecombustjbles.-in this room which limits the MPFL to 37,300 BTU /ft

4. The fire test conducted on~FZR cable did not have deterioration on exposed cable tray steel until the steel had been exposed to the test fire-for over 40 minutes and-had reached a-temperature of over 1600'F. Also the test was-performed in accordance with the standard temperature curve (E Curve) which is more severe than would occur with the combustible loading. A fire in Room X-280 would not reach the intensity. level of the test fire'even if no suppression was utili::ed and 'the fire was~ allowed ~ to burn freely.

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2-FP 0085, Rev. 1 Page 18 of 40 6.4.2 FIREZONE AA-21B 6.4.2.1 General Firezone AA 21B is located on the 790' 6" elevation of the:

Auxiliary Suilding. There are 10 rooms in the fire zone, 2 of which contain Unit 2 Thermo Lag or FZR cable (Rooms X 202 and X-207). Both rooms have complete automatic sprinkler 2protection.

The combustible loading for the zone is 36,200-BTU /ft and the fire duration utilizing temperature Curve C is 39 minutes with a maximum temperature of 1050*F. The MPFL is limited to 80,000 BTU /ft'.

6.4.2.2 Discussion lag- X-202 is a 300 ft room 2

with a combustible loading consisting of a minor amount of exposed cables. There is no equipment in the-area which contributes significantly to combustible loading.

There is complete automatic sprinkler protection in the room, Ionization detection is pt vided throughout and manual suppression capability with portable extinguishers and hose stations is provided.

Room X-207 is the 9887-fta main corridor area which is 75% of the-fire zone area. The combustible loading consists of exposed-cable, fire hose, frisker station, anti-contamination clothing and various other minor amounts of ordinary combustibles (cloth, wood, paper, etc.) and plastics. The corridor has complete automatic-sprinkler suppression with ceiling level, obstruction level and- /

cable tray coverage. Ionization detection is provided and manual suppression capability with portable extinguishers and hose stations is provided.

6.4.2.3 Results Thermo-Lag and FZR cable supports and cable trays which support FZR cables are not requ. red to be protected based on.the following:

1. The combustible loading is such that a C-Curve fire could-reach temperatures near the critical temperatures of steel if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, predominantly electrical cables in trays and-ordinary.

combustibles and plastics well arranged in rolls,.

dispensers, and boxes on non combustible shelves, is more conducive to a slow developing-or smoldering fire which would be detected early at relatively low temperatures.

2. There is complote automatic sprinkler protection (see Section 1.5). There is also ionization detection throughout and manual suppression capability is provided with hose stations and portable extinguishers.

3. There ;re administrative controls on the combustibles in these' rooms which limit the.MPFL to 80,000 BTU /ft2 -

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2-FP-0085,-Rev. 1 Page 19'of 4C

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until the . steel.

had been exposed to the test fire for over 40 minutes and had reached a: temperature of over 1600'F. Also, the test-was. performed in accordance with theistandard temperature-cu;ve_(E Curve) which is more severe than would occur with-the combustible loading. A fire-in these rooms would not reach the'incensity level of the test even-if no suppression was utilized and the fire was allowed to burn freely, i.

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2-FP-0085, Rev. 1..

Page 20:of 40 6.4.3 FIRE ZONE AA-21C 6.4.3.1 General Fire Zone AA-21C is located on the 8228 -0" elevation of the Auxiliary Building. Inere are 2 rooms in this fire zone and only Room X-208 contains Unit 2 Thermo Lag or FZR cable. There is no sprinkler protection foe the room. The combustible loading for-the zone is 2800 BTU /ft and the-fire duration utilizing the C-Curve is 3 minutes-with a maximum temperature of 400'F. The MPFL is reduced to 37,300 BTU /fta due to the non sprinklered rooms and Room X 208 will be designated as "no storage".

6.4.3.2 Discussion Room X-208 is a 1400 ft2 room with a combustible loading consisting of a minor amount of exposed cables. There is no.

equipment in the-area which contributes significantly to combustible loading. There is no sprinkler protection for the room so it will be designated as a "no storage" room. Ionization detection is provided throughout and manual suppression capability with bose stations and portable extinguishers is provided.

6.4.3.3 Results l

The supports associated with Thetus-Lagged raceways are not l required to be protected based on the following:

1. The combustible loading is low in this room. The fire duration is only 4 minutes on the C-Curve and the maximum temperature developed'is 400*F which is well below the-1100'F critical temperature for steel. Also-the arrangement of the combustibles and troe lack of congested storage is not conducive to an intense, fast developing fire.

2. There is no sprinkler protection, but the addition.of-sprinkler protection would not substantially istrove the ability of the supports to witnstand a design basis firo due to the low severity and' duration of a fire in this room.

Ionization detection is provided throughout and manual i

suppression capability is provided by. hose stations and portable extinguishers.

3. There are administrative controls for the combustibles in these rooms:

a. The rooms are designated "no storage"

b. The MPFL is limited to 37,300 BTU /f t a.

4 The fire test conducted on FZR- cable did not nave deterioration of exposed cable tray steel until the steel was subjected to much higher temperatures for a much longer time than could occur.with a fire in.this room-. . Support -

. steel for Thermo-Lagged raceways is more substantial than the steel construction of the cable trays in the test.

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2 FP-0085, Rev. l' Fage 21:of-40 6.4.4 FIRE ZONE AA-21D 6.4.4.1 General Fire Zone AA-21D is located on the 831' -6" elevation of the Auxiliary Building. There are-12 rooms in the fire zone and 3-contain Unit 2 Thermo Lag or FZR cables-(Rooms X-219, X 219A and X-226) which are the corridor areas. Rooms 1X-219 and X-226 have complete automatic sprinkler protection and room.X-219A does not.

The combustible loading for the zone:is 17,000 BTU /ft and 2 the fire duration utilizing tem erature Curve C is 18 minutes with a maximum temperature of 900* . The MPFL is limited to 37,300 BTU /ft2 due to room X 219A not being sprinklered.

6.4.4.2 Discussion Room X-219 is a 936 fta east / west connecting corridor between corridors X-219A and X-226. The combastible loading in this room consists of exposed cable,-spill kit gang boxes,-radiation bag dispenser, frisker station.and some miscellaneous paper and 5 plastic materials. There is complete automatic sprinkler' suppression in the room. Ionization detection is provided throughout and manual suppression capability with portable extinguishers and hose stations is provided.

Room X-219A is a 2088 ft2 corridor. The combustible loading in this room is considerably lower than:the-loading-for the remainder of the zone and consists of exposed cables, spill kit gang boxes, fire hose stations, radiation bag dispenser, frisker station and-some miscellaneous paper-and plastic materials. There is no automatic sprinkler suppressiot in-chis-room. Ionization-detection is provided throughout and manual suppression capability-with portable extinguishers and hose stati:as is provided.

Room X-226 is a 3460 2ft corridor. The combustible-loading in-this room is exposed cables,. fire hose stations, anti contamination clothes and miscellaneous minor amounts-of-ordinary combustibles (plastic and rubber materials). There-is complete automatic sprinkler suppression in this room. - Ionization detection is provided throughout and manual suppression capability _

witn portable extinguishers and hose stations is=provided.

6.4.4.3 Results The Thermo-Lag and FZR cable supports and cable trays which support FZR cables are not required to be protected based on the following:

The combustible loading is such-that a C Curve fire would reach temperatures-near the critical temperature of steel if-allowed to burn freely.without suppression being utilized.

The arrangement- and type of- combustibles ; predominantly

. electrical cables-in trays and ordinary combustibles and plastics well arranred in rol19, dispensers and boxer on non combustible sheYves is more conducive to'a slow developing or smoldering fire which would-be detected early

,at relatively low temperatures.

2-FP-0085, Rev. 1-Page-22-of 40- -

2. There is complete automatic sprinkler suppression infrooms X 219 and X-226 (see Section 1.5).. There is no automatic-suppression'in room-X-219A,:but due to the reduced combustible loading in this room plus the ionization.

detection and manual suppression coverage by portable ,

extinguishers and hose stations, the addition of automatic suppression would not significantly. add to the ability-of-these supports to withstand the expected fire in this area.-

3.

Thereareadm}nistrativecontrolswhichlimit 37,300 BTU /ft . the as Room X-219A will be desi6nated MPFL "no to storage" due to the room not having sprinkler protection.

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel-until the steel

-had been exposed in the test fire for over 40 minutes and-had recched a temperature of over 1600*F. Also the test vas-performed accordance with the standard-time-temperature curve-(Curve E) which is more severe than would occur with the combustible loading-in these rooms. A fire in-these ,

rooms would not reach the intensity level of the test. fire-even if no suppression was utilized'and the fire was allowed-to burn freely.

2 FP 0085, Rev, 1 Page 23 of 40 6,4,5 FIRE ZONE AA-21F 6,4.5.1 General Fire Zone 21F is located on the 852' - 6" elevation of the Auxiliary Building. There are 7 rooms in the fire zone and 1 contains Unit 2 Thermo Lag or FZR Cables (Room X 241)~, Room-X 241 has complete automatic s rinkler protgetion. The combustible-loading for the zone is 2,900 BUT/ft and the fire duration utilizing temperature Curve C is 14 minutes with a maximum 2 temperature of 875'F. The MPFL is limited to 15,000 BTU /ft due to the 20 foot separation deviation in this area, 6,4,5,2 Discussion Room X-241 is-a 7978 ft2 corridor area, The combustible loading consists of exposed cables, fire hose stations, lube oil in-equipment, anti contamination clothing ion exchange _ resin, frisker station, radiation bag dispenser, spill kit gang box and some miscellaneous minor plastic and paper materials. There:is-complete-automatic sprinkler protection in the room. Ionization detection is provided throughout and manual suppression capability -

with portable extinguishers and hose stations is provided.

6.4.5.3 Results Thermo-Lag and FZR cable supports and cable trays which support FZR cables are not-required to be protected based on the following:

1. The combustible loading is such that a C Curve fire would reach temperatures considerably below the critical-temperature of steel even if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, mainly electrical ccbles in trays, ordinary _

combustibles and plastics well arranged in rolls,.

dispensers, and boxes and on non combustible shelves and lube oils and resins in equipment-is more conducive to a sisw developing or smoldering fire which would be detected early at relatively low temperatures,

2. There is complete automatic sprinkler supp: ssion in the room (see Section 1.5), Thers h. ionization detection throughout and manual suppres:!an capability is provided by hose stations--and pnretble ext..- .ishers.

3. There are administrative conttols on the combustibles in the room which limits the MPFL to 15,000 BTU /ft a, 4 The fire. test conducted on FZR cable did not have deterioration of exposed cable trayisteel-until the steel-had been exposed in _the test fire for over 40 minutes and had reached a temperature of over 1600*F. -Also the test was performed in accordance wit'. the-standard temperature curve (Curve E) which is more severe-than would occur with the-combustible loading in room X 241, A fire in room X-241' would not reach the intensity level of the test fire even if no suppression was utilized and the fire was allowed to burn freely

2-FP 0085, Rev, 1 Page 24 of 40 6.4.6 FIRE ZONE AA-154 6.4.6.1 General Fire Zone AA 154 is located on the 778'-0" elevation of-the Electrical Controls Building. Room 115B is the only room in the fire zone. This is the Unit 2 Chillor Room. The room has-complete2 automatic suppression. The combustible loading-is 22,800 BTU /ft and the fire duration utilizing temperature Curve C is 25 minutes with a maximum temperature of 950*F. The MPFL is limited to 80,000 BTU /ftz.

6.4.6.2 Discussion Room X-115B is a-1672 ft 2 room with a combustible loading he room consisting of exposed cables and lube oil in equipment. T is subdivided into 3 compartments by a combination of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> rated fire walls and fire protection water trcains. There is complete automatic suppression in the room, ionization detection _is rovided throughout and manual suppression capability is provided y portable extinguishers and hose stations 6.4.6.3 Results Supports associated with Thermo Lagged raceways are not required -

to be protected based on the fallowing:

1. The combustible loading is such that a C-Curve fire-could-reach temperatures near the critical temperatures of steel if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, predominantly electrical cables in trays and lube oil in equipment is more conducive to a slow developing or smoldering-fire which would be detected early at relatively.

low temperatures.

2. There is complete automatic' sprinkler protection _(see-Section 1.5). There is also ionization detection throughout and manual suppression capability is provided by hose stations.and portable extinguishers.

3. There are administrative controls on the combustibles in these rooms which limit the MPFL to-80,000-BTU /ft a,

4. The fire test conducted on FZR cable did-not have deterioration of exposed cable tray steel until the steel had been exposed to the test fire-for over 40 minutes and had reached a temperature of over 1600*F. Also, the-test was performed in accordance vith the standard temperature curve (E-curve) which is more severe-than would occur with the-combustible loading. A fire in this room would not reach the intensity level of the test fire even if the no suppression.was utilized and the fire allowed to burn freely.

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7 2-FP 0085, Rev. 1 Page 25 of -40 6.4,7 FIRE ZONE EA-43 6.4.7.1 General Fire Zone EA43 is located.on the 778-0" elevation of the Electrical Controls Building. Room X 113 is the only room in the fire zone. The room has complete autonapic sprinkler suppression.

The combustible loading is 15,800 BTU /ft and the fire duration utilizing temperature curve C is 28 minutes with a maximum 2 temperature of 950*F. The MPFL is limited to 80,000 BUT/ft .

6.4.7.2 Discussion Room X-113 is a-9480 fta room with a combustible-loading consisting of exposed cables, lube oil in equipment, fire hose stations and minor amounts of paper and plastic materials. There is complete automatic suppression in the room, ionization detection is provided throughout and manual suppression is capability provided by portable extinguishers and hose stations.

6.4.7.3 Results Support associated with raceways are not required to be protected-based on the following:

1. The combustible loading is such that a C-Curve fire could reach temperatures near the critical temperatures of-steel if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, predominantly electrical cables in trays, ordinary combustibles and plastics well arranged in rolls and-lube.

oilinequipmentismoreconducivetoaslowdevelopinfvor smoldering fire which would be detected early at relat ely low temperatures.

2. There is complete automatic sprinkler protection (see Section 1.5). There is also ionization detection-throughout and manual suppression capability is provided by hose-stations and portable extinguishers.

3. There are administrative controls on the combusti les in these rooms which limit the MPFL to 80,000. BTU /ft

4. The fire test conducted on FIR cable'did not have deterioration of exposed cable tray steel- until the steel had been exposed-to the test fire for over~40 minutes and had reached a temperature of over 1600*F. Also, the; test-fire was performed in accordance with the _ standard temperature curve (E-curve) which is more severe than would occur with the combustible loading. A fire in this rooms would not reach the intensity level of the test-fire even if no suppression was utilized and the fire allowed to burn freely.

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_PAge 26 of 40.

6.4.8 FIRE ZONE EAS4 6.4.8.1 Ceneral Fire Zone EA 54 is located on the.792 0" elevation of the Electrical control Beilding. Room X .22 is-the only room in the fire zone. The room has complete automatic-sprinkler protection.

The combustible loading is-13,000 BTU /ft2 and the fire duration utilizing temperaturs Curve C- is 24 minutes with a maximum a temperature of 950 F. The MPFL is limited to 80,000 BUT/ft ,

6.4.8.2 Discussion Room X-122 is a 516 ft2 corridor area outside of the battery rooms. The combustible loading consists of exposed cable and a fire hose cabiner. There is complete automatic suppression in the room, ionization detection-is provided throughout and manual' _

suppression capability is provided by portable extinguishers and hose stations.

6.4,8.3 Results Supports associated with Thermo Lagged raceways are not required to be protected based on the following:

1. The combustible loading is such that a C-Curve fire could reach temperatures neer the critical temperatures of steel if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles,-

predominantly electrical cables in trays,- is more conductive to a slow developing or smoldering fire which would be detected early at relatively low temperatures.

2. There is complete automatic sprinkler protection (see Section 1.5). There is also ionization detection throughout and manual suppression capability is provided by hose stations and portable extinguishers.

3. These are administrative controls on the combustibles in these rooms which limit the MPFL to 80,000 BTU /ft a,

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The fire test conducted on FZR-cable did not have deterioration of exposed cable tray steel until the . steel had been exposed to the- test 1 fire for over 40 minutes and had reached a temperature of over 1600 F. Also, the test was performed in accordance with the standard temperature curve (E-curvo) which is more severe than would occur with the-combustible loading. A fire in this room;would not reach the intensity level of the test fire even if no suppression was~ut'ilized-and the fire was allowed to burn freely.

2 Fp 0085, Rev. 1 Page 27 of 40 6.4.9 FIRE ZONE 2SAIC 6.4.9.1 Ceneral Fire Zone 2SA1C is located on the 790' 6" elevation of Unit 2 Safe 6uards. There are 3 rooms in the fire zone and 2 roon (2 063 and 2 064) have FZR cable. Room 2 063 has complete automatic sprinkler protection. Room 2 066 has po automatic suppression.

The combustible loading is 8400 BTU /ft and the fire duration uti'iting temperature Curva C is 9 minutes with a maximum temt.rature of 750'F. The MPFL is limited to 37,300 BTU /ft due to roca 2 064 not having automatic sprinkler protection.

6.4.9.2 Discus 11.20 Enom 2-06? is a 922 ft: room with a combustible loading consisting of exposed cables. There is complete automatic suppression in-the room, ionization detection is provided throughout and manual suppression capability is provided-by portable extinguishers and hose stations.

Room 2-066 is a 546.ft a room with a combustible loadin oi-exposed cables. There is no automatic suppression in g consisting the room so it will be designated as a "no sto.* age" room.- Ionization detection is provided throughout and manual suppression capability with portable extinguishers and hose stations is provided.

6.4.9.3 Results Thermo Lag and FZR cable supports and cable trays which support FZR cables are not required to be protected based on the following:

1. The combustibio loading is low in these rooms. The fire duration is only 9 minutes-on the C-Curve and'the maximum i temperature developed is 740'F which is well below the -

1100'F critical tempetature for steel. Also, the arrangement of the combustibles and the lack of congested storage is not conductive to an intense, fast developing fire.

2. There is auismatic sprinkler protection in room 2 063 but none in room 2-066. Addition of sprinkler prerection would r.ot substantially-improve the ability of the iepports to withstand a design basis fire due to the low severity and duration of a fire in this room. Ioaizar!on detection is provided throughout and manual suppress.at capability is provided by hose stations and portable extinguishers.

3. There are admirdstrative controls ~ for the combustibles in these rooms:

a. Room 2 066 will be designated "no storage"

b. The MPFL is limited to 37,300 BTU /ft .

2

=4 The fire-test conducted on FZR cable oid not have deterioration of exposed cable tray . teel until the steel was subjecte' so much higher temperatu'es e for a much longer time than ce ld occur with'a fire in th's room.

i

1 4

2.rp.0085 Rev. 1 ,

Page 26 of 40 I l

6.4.10 F1p.E ZONE 2SA142 6.4.10.1 General Fire Zone 2SA142 is located on the 810' 6" elevation of Unit 2 Safeguards. Room 2 077A is the only room in the fire zone. Room 2 077A has complete automatic sprink.ler protection. The combustible loading is 11,800 BTU /ft 2 and the fire duration utilizing temperature Curve C is 13 minutes with a maximum 2 temperature of 850'F. The MPFL is limited to 80,000 BTU /ft ,

6.4.10.2 DJscussion Room 2 077A is a 1195 f t* room with a combustible loading consisting of exposed cables. There in complete automatic j suppression in the room,-ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.10.3 Results Supports associated with Thermo lagged raceways are not required to be protected based on the following: ,

1. The combustible loading is such that a C. curve fire would.

not reach temperatures near the critical temperatures of sten 1 even if allowed-to burn freely without suppression-being utilized. The arrangement and type of combustibles, electrical cables-in trays, is-more conducive to a slow developing.or smoldering fire which would be detected early at relatively low temperatures.

2. There is complete automatic sprinkler protection (see Section 1.5). There is also ionization detection throughout and manual suppression capability is provided by hose ,

stations and portable extinguishers.

3. Thereareadministrativecontrolsonthecombust}blesin.

e these room which limit the MPFL to 80,000 BTU /ft

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until the steel-had been exposed to the test fire for over 40 minutes and ,

had reached a temperature of over-1600'F. Also,-th: test-was performed in accordance with the standard temperature. ,

curve (E. curve). which is more . severe than would occur with the combustible loading. A fire in this room would not reach the intensity level of.the test even if no suppression.

.was utilized and the fire was allowed to burn freely.

h a.me m- a n w erW,ete + , , w-%.r--g n- -e n +,v e y -. M g v e.i , w tve-n ,w.w- ey -r- ower e c + -ar -t + - - r e = 1r-e f-:x rag =M 4 y p. -e w -w e,-+s - --g **>mvW*

• 2 FP 0085 Rev. 1 Page 29 of 40 6.4.11 FIRE ZONE 2SB4 6.4.11.1 General Fire Zone 2SB4 is located on the 790' 6" elevation of Unit 2 Safeguards. This fire zone consists of 5 rooms, 2 of which have Thermo Lag or FZR cable (Rooms 2 070 and 2 071). Rooms 2 070 and 2-071 loadingare forcorridor areas this fire onisthis zone elevation.8 26,200 BTU /ftThe and combustible the fire duration utilizing temperature Curve C is 28 minutes with a maximum a temperature of 950'F. The MPFL is limited-to 80,000 BTU /ft ,

6.4.11.2 Discussion Poom 2 070 is a 4155 fta corridor crea with a combuetible loading consisting of exposed cables, 3 fire hose stations,- anti.

contamination, clothing and frisker stations. There is complete automatic suppression in the room._ ionization detection is previded throughout and manual suppression capability is provided by portable extinguishers and home stations.

E2em 2 071 is a 610 fta corridor area with a combustible loading consisting of exposed cables and a fire hose station. There is complete automatic suppression in the .oom, ionization detection is provided throughout and manual supt cession capability is provided by portable extinguishers and hose stations.

6.4.11.3 Results Thermo Lag and FZR cable supports and cable trays which support FZR cables are not required to be protecte d based on t' t followin5:

1. The combustible loading is such that a C Curve fire would not reach temperatures near the critical temperatures of steel even if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, electrical cables in trays, is more conducive to-a slow developing or smoldering fire which would be detected early at-relatively-low-temperatures.

2. There is complete automatic sprinkler protection (see Section 1.5). There is also ionization detection throughout-and manual suppression capability is provided by hose stations and portable extinguishers.

3. There are administrative controls on the combustibles in these room which limit the MPFL to 80,000 BTU /ftz ,

4. The fire test conducted on-FZR cable did not have deterioration of exposed cable tray steel until the-steel-had been exposed to the test fire for over 40 minutes and had reached a temperature of over 1600*F. Also, the test was performed in accordance with the standard temperature curve (E curve) which is more severe than would occur with-the combustible loading. A fire in this room would not reach the intensity level of the test fire-even if no suppression was utilized and the fire was allowed to burn freely.

lll

2 FP 0085, Rev. 1 Page 30 of 40 6.4.12 FIRE ZONE ?SB8 6.4.12.1 General Fire Zone 2SB8 is located on the 810'-6" elevation of Unit 2 Safeguards. The fire area consists of 3 rooms, 2 of which have Thermo ter or FZR cable (2 079 and 2-082). Rooms ?-079 and 2 082 are corridor areas on this elevation. The combustible loading for the zone is 101,300 BUT/ft 2 and the fire duration utilizing temperature Curve C is 109 minutes with a maximum temperature of The MPFL is 80,000 BTU /ft2 so the actual fire loading 950 F. a exceeds the MPFL. This has been justified in the Fire Protection Report (Ref. 5.18) due to provision of ionization detection and automatic sprinkler protection commensurate with the hazards in the area to ensure a postulated fire will not spread out of the area.

6.4.12.2 Discussion Room 2 074 is a 774 ft2 corridor area with a combustible loading consisting of exposed cables and a fire hose station. There is complete ,mtomatic suppression in the room, ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations Room 2 082 is a 2702 ft2 corridor area with a combustible loading consisting of exposed nables, fire hose stations, anti-contamination clothing, spill kit gang box, frisker station and radiation bag dispenser. There is complete automatic suppression in the room, ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.12 Results Thermo Lag supports and cable trays which support FZR cables are not required to be protected based on the following:

1. The combustible loading is such that a C-Curve fire will 6 reach temperatures above the critical temperatures of steel '

even if allowed to burn freely without suppression being utilized. However, the arrangement and type of 5h combustibles, electrical cables in trays is more conducive to a slow developing or smoldering fir'e which would be

• detected early at relatively low temperatures.

2. There is com Section 1.5)plete automatic sprinkler protection (seeDue to the congestion oi cable trays area, most of the trays have cable tray suppression as well as ceiling level and obstruction level coverage. There is also ionization detcction throughout and manual suppression capability is provided by hose station and portable extinguishers.

3. Thereareadministrativecontrolsonthecombust}bles in these room which limit the MPFL to 80,000 BTU /ft Since the actual comtustible loading exceeds MPFL there can be no additional combustibles brought into area.

I

-2.FP.0085, Rev. 1 Page 31 of 40

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until the steel had been exposed to the test fire for over 40 minutes and had reached a ternperature of over 1600'F. Also, the test was performed in accordance with the standard temperature ,

curve (E curve) which is more severe than would occur with the combustib4e loading. A fire in this room would not reach the intensity level of the test even if no suppression was utilized and the fire was allowed to burn freely.

2 FP-0085, Rev. 1 page 32 of 40

/ M 'i'U% Ad%? L

.!) , .; _cd

?<<m 3 ne 2SB15 is located on the 831' 6" elevation of Unit 2

!si' osards. This fire zone consists of 2 rooms, 1 of which has Thermo Lag or FZR cable (Room 2 094). Room 2+094 is the corridor area on this elevation. The combustible loading for the fire zone 8

is 43,200 BTU /ft and the fire duration utilizing temperature CurveCis46minuteswithamaxjmumtemperatureof1300*F. The HPFL is limited to 80,000 BTU /ft 6.4.13.2 Discussion Room 2 094 is a 3468 ft2 corridor area with a combustible loading consisting of exposed ca51er, fire hose station, spill kit gang box, frisker station, anti contamination clothing and some miscellaneous ordinary combustibles, rubber and plastics. -There is complete automatic suppression in the room, ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.13.3 Results Supports associated with Thermo Lagged racevays are not required to be protected based on the-following:

1. The combustible loading is such that a C Curve fire could exceed critical temperatures of steel if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, predominantly electrical cables in trays and ordinary combustibles and plastics well arranged in rolls, dispensers, boxes and on non combustible shelves, is more conductive to a slow developing or smoldering fire which would be detected encly at relatIvely low temperatures.

2. Thore is com

--Section 1.5)plete automatic

.- There is also sprinkler protection-(see ionization detection-throughout and manual suppression capability is provided by-hose stations and portable extinguishers.

3. There are administrative controls on the combusti les in these rooms which limit the HPFL to 80,000 BTU /ft

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until the steel had been exposed to the tost fire 'for over 40 minutes and had reached a tempetature of over 1600*F. Also, the test was performed in accordance with the standard temperature curve (E-curve) which:is more- severe than would occur with -

the combustible loading. Although a fire in this room would reach the intensity level of the test fire if'no suppression-was utilized and the fire burned at the intensity of a C-curve, the type and arrangement of combustiblea would not result in a fast developing fire and suppression would be utilized before the fire reached the critical temperature.

l i

1

2 FP 0085, Rev. 1 Page 33 of 40 s

i 6.4.14 FIRE ZONE 2SB144

. 6.4.14.1 general Fire Zone 2SB144 is located on the 831'.6" elevation of Unit 2 Safeguards. Thisfirezoneconsispsonlyofroom2-088. The combustible loading is 7300 BTU /ft and the fire duration utilizing temperature Curve C is 8 minutes with a maximum a temperature of 700*F.

j The MPFL is limited to 80,000 BTU /ft ,

6.4.14.2 Discussion Room 2 058 is a 1843 ft: room with a combustible loading ,

consis*.ing of exposed cables. There is complete automatic suppression in the room, ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations. ,

6.4.14.3 Results ,

Thermo. Lag supports and cable trays which support FZR cables are not required to be protected based on the following:

1. The combustible loading is such that a C. Curve fire would be considerably less than the critical temperatures of steel if

~

allowed to burn freely without suppression being utilized.

The arrangement and type of combustibles, electrical cables in trays is more conducive to a slow developing or-smoldering fire which would be detected early at relatively low temperatures.

2. There is complete automatic sprinkler protection (see Section 1.5). There is.also ionization detection throughout and manual suppression capability is provided by hose stations and portable extinguishers.

3. There are administrative controls on'the combusti les in l these rooms which limit the MPFL to 80,000 BTU /ft

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until the steel had been exposed to the test fire for'over 40 minutes and had reached a temperature of over 1600*F. Also, the test was performed in accordance with the standard temperature curve -(E-curve) which is more severe than would occur with the combustible loading. Although a: fire-in this room would J reach the intensity level of the test fire if-no suppression was utilized and the fire burned at the intensity of a C cu rve , the type and arrangement of combustibles would not result in a fast developing fire and suppression would be utilized before the fire reached the -critical temperature :  ;

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1 2-FP 0085, Rev. 1 Page 34 of 40 l 6.4.15 FIRE 20M MJL9, 6.4.15.1 General Fire Zone 2SD9 is located on the 810' 6" elevation of Unit 2 Safeguards. The fire zone consists of 2 rooms, 1 of which has Thetmo Lag (Room 2 083)). The combustible loading is 44.300 BTU /ft a and the fire duration utilizing temperature Curve C is 48 minutes with a maximum temperature of 1350*F. The MPFL is limited ,

to 80,000 BTU /ft 8. l 6.4.15.2 Discussion Room 2 083 is a 6554 ft2 electrical equipment room with a combustibic loading consisting of exposed cables, fire hose 4 ru stations and various amounts of ordinary combustiblesThere is complete manual plastics. I cuppression in the room, ionization detection i; provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.15.3 Results 3

Support associated with Thermo Lagged raceways are not required to be protected based on the following:

1. The combustible loading is such that a C-Curve fire would  !

exceed temperatures near the critical temperatures of steel if allowed to burn freely without suppression being utilized. The arrangement and type of combustibles, predominantly electrical cablos in trays and ordinary combuctibles and plastics well arranged in rolls, e dispensers, boxes and on now combustible shelves, is more 4 conducive to a slow developing or smoldering fire which would be detected eacly at relatively low temperatures.

2. There is complete manually actuated sprinkler protection (see Section 1.5). There is also ionization detection throughout and manual suppression capability is provided by

. hose stations and portable extinguishers.

3. There are administrative controls on the combusti les in these rooms which limit the MPFL to 80,000 BTU /ft

4. The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel until-the' steel had been exposed to the test fire for over 40 minutes- and had reached a temperature of over 1600*F. Also, the test was performed in accordance with the standard temperature curve which is more severe than would occur with the combustible loading. A fire in this room would not reach the intensity level of the test even if no suppression'was-utilized and the fire was -allowed to burn' freely due to the type and configuration of the combustibles.

't-

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2 FP 0085, Rev. 1 Page 35 of 40 6.4.16 FIRE ZONE 2SE16 6.4.16.1 General Fire Zone 2SE16 is located on the 831' .6" evaluation of Unit 2 safeguards. The fire zone consists pf Room 2-096 only, The combustible loading is 31.700 BTU /ft and the fire duration utilizing temperature Curve C is-34 minutes with a maximum 3 temperature of 1000*F. The MPFL is limited to 80,000 BTU /ft .

6.4.16.2 Discussion Room 2-056 is a 5105-ft2 electrical equipment room with a-combustible loading of exposed cables, and minor amounts of-ordinary combustibles, plastics, rubber, grease and small containers of flammable and combustible IIquids. There is complete manually operated sprii.kler suppression in the room, ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.16.3 Results Thermo Lag supports-are not required to be protected based on the following:

1. The combustible loading is such that a C. curve fire could reach temperatures _near the critical temperatures if steel is allowed to burn freely without suppression bein5 utilized. The arrangement and type of combustibles, predominantly electrical cables in trays and ordinary combustibles and plastics well arranged in rolls dispensers, boxes and on non combustible shelves, is more conducive to a slow developing or smoldering fire which would be detected early at relatIvely low temperatures.

2. There is complete manually actuated sprinkler protection (see Section 1.5). There is also ionization detection throughout and manual suppression capability.is provided by-hose stations and portable extinguishers.

3. There are administrative controls on the combustibles in these rooms which limit the MPFL to 80,000 BUT/ft z, 4 The fire test conducted on FZR cable did not have deterioration of exposed cable tray steel unti'. the steel had been exposed to the test fire for over 40 minutes and had realized 4 temperature of over 1600'F. Also, the test was performed in accordance with the standard temperature curve- (E Curve) which is- more severe than would occur with the combustible loading. A fire in this room would not reach the intensity level of the test even if no suppression utilized and the fire _was allowed to burn freely.

_ . - . ~ . - . - - .

i 2 FP.0085, Rev. 1 l PaEe 36 of 40 a

6.4.17 TIRE ZONE 2SE18

/ 6.4.17.1 General l Fire Zone 2SE18 is located on the 852-6" evaluation of Unit 2 l Safeguards. The Fire Zone consists of 3 rooms. 1 of which ha0 f Thermo-Lag (2 103). The combustible loading is 21,000 BTU /ft and the fire duration utilizing temperature Curve C is 21 minutes with l The HPFL is limited to 80,000 4 a maxipum temperature of 900'F.

l BTU /ft j 6.4.17.2 Discussion I Room 2 103 is a 7259 ft z electrical equipment room with a i l combustible loading consistin6 of exposed cables, fire hose l 1 stations, plastics in equipment and some miscellaneous paper, j rubber and plastic materials. There is complete manually operated-

! sprinkler suppression in the room, ionization detection is >

provided throughout and manual suppression capability-is provided

! by portable extinguishers and hoses. stations. i l 6.4.17.3 Results i

a Supports associated with Thermo Lagged raceways are not ~ required j to be protected based on the followIng:

} 1. The combustible loading is such that C Curve-fire could l

reach temperatures near the critical temperatures of steel i if allowed to burn freely without suppression being

= utilized. The arrangement and type of combustibles, predominantly electric.a1 cables in' trays and ordinary >

combustibles and plaeics well arranged in rolls, dispensers, boxes and on non-combustible shelves, is more conducive to a slow developin or smoldering fire which

would be detected early at re atively low temperatures.

3 2. There is complete manually actuated sprinkler protection l (see Section 1.5). There is also ionization detection 1 throughout and manual suppression capability-is provided by  ?

! hose stations and portable extinguishers, i

3. Thereareadministrativecontrols'onthecombustiplesin these rooms which limit the MPFL to - 80,000 BTU /f t

- 4. The fire test conducted on FZR cable did:not have deterioration of exposed cable tray steel until the steel-had been exposed to the test firo for over 40 minutes and 1

reached = a temperature of over 1600'F. Also, the test was performed in accordance with the standard temperature curve (E-curve) which is more severe than would occur with the._

combustible loading'. A fire in this room would-not reach the intensity level of.the test even if no. suppression was utilized and the fire was allowed to burn freely.

i n

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2 FP 0085. Rev. 1 Page 37 of 40

+

6.4.18 FIRE 20NE ?SK17A ,

f 6.4.18.1 General ,

Fire Zone 2SK17A is located on the 852' 6" elevation of Unit 2 Safeguards. The Fire Zone consists of 8 approximately equal sited rooms. 2 of which contain Thermo Lag f Rooms 2-100B and 2 100F) .

The combustible loading is 800 BTU /ft and the fire duration -

utiliting temperature Curve C is 1 minute with the maximum 2 temperature of 300'F. The MPFL is limited to IBOO BTU /ft . ,

6.4.18.2 Discussion Rooms 2 100B and 2-100F are each approximately 460 ft2 rooms with a combustible loading consisting of a minor amount of exposed cables and lube oil In a valve In Room 2 100F. There is-complete automatic sprinkler suppression for both rooms. ionization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.18.3 Results supports associated with Thermo Lagged raceways are not required" to be protected based on the following:

1. The combustible loading is such that a C Curve fire would be much less than the critical temperatures of steel even if1 e allowed to burn freely without suppression being utilized.

The arrangement and type of combustibles, predominantly electrical cables in trays and a mi.1or amout- of lube oil in ,

valves is more conducive to a slow developing or smoldering

~

fire which would be detected early at relativelf low

- temperatures.

2. There is complete automatic sprinkler protection (see Section 1 ~~. There is also ionization detection throughout and mant-$' ppression capability is provided by hose j station ano portable extinguishers. ,

3. There are administrative controls on the combustibles in -

these rooms which limit the.MPFL to IBoo BTU /ft 2. Also the rooms are designated as "no storage" due to a 20 foot separation deviation.

4 The fire test conducted on FZR cable did not have deterioration of exposed-cable trav steel until the steel had been exposed to the test fire 'for over 40 minutes-and had reached a temperature of~over 1600*F. Also. the test was performed in accordance with the standard temperature curve (E Curve) which is more severe than would occur with the combustible loading. A fire in this room would not >

reach the intensity level of the test even if no suppression was utilized and the fire was allowed to burn freely.

I l

l

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'-FP 0085, Rev. 1 Page 38 of 40

6.4.19 FIRE 20NES ?SM17B AND 17C

! 6.4.19.1 General  !

i 1

Fire Zones 2SK17B and 17C are located on the 873' 6" and 880'-6" elevation, respectively, of-Unit 2 Safeguards. Although they are 1

considered separate fire zones there is no physical separation.

Rooms 2 108B and 2-109B, which are the only room in these zones to have Thermo Lag, are actually the same room physically. The i combustible loading for zone 17B is 1800 BTU /f't and the fire

, duration, utilizing temperature Curve C is 1 minute with a maximum 4 temperature of 400 F. Fire Zone 17C has no combustible loading. '

4 Both rooms will be designated as "no storage" due to a deviation i for 20' separation requirements. The MPFL is limited to l e CX: -

BTU /ft*,  !

6.4.19.2 Discussion Rooms 2 108B and 2-109B are 460 ft 2 rooms with a combustible loading consisting of a minor amount of exposed cables. There is complete automatic sprinkler suppression in the room, ionization

, detection is provided throughout-and manual suppression _ capability is provided by portable' extinguishers and-hose stations.

6.4.19.3 Results Supports associated with Thermo Lagged raceways are- not required to be protected based on the followin5:

1. The combustible loading is such that a C-Curve fire would '

not result in-temperatures any where near the critical temperatures of steel even if allowed'to burn freely without suppression being utilized. The arrangement and type of combustibles, predominantly a minor amount of electrical cables is more conducive to a slow developing or smoldering fire which would be detected early at relatively low temperatures.

2. There is comolete automatic sprinkler- protection -(see Section 1.5T. There is also ionization detection throughout and manual suppression capability is provided by hose stations and portable extinguishers.

3. There are administrative controls on the combustibles in these rooms which 1.mit the MPFL to 1800 BTU /ft.2 Also .

the rooms are designated as "no storage" due to a 20 foot separation deviation.

4. The fire test-conducted on FZR cable did not have

-deterioration of exposed cable tray steel'until the steel had been exposed to the test fire for over 40 minutes and t had reached a temperature of over 1600'F, - Also, the. test was performed'in accordance with the standard temperature curve (E Curve) which is more severe than would: occur with' ,

the combustible loading. A fire in these rooms would'not-reach' the intensity level of the test even if no suppression was utilized aad the fire was allowed'to burn freely. ,

__._u._.,__.w- ., . . .,~,-...._._,_.__..a. _,,.u.-.,.. _._._ _ - .-...;__

I 4

9 2 FP 0085; Rev. 1 Page "$9 of 40 6.4.20 FIRE ZONE 2SL S"12Q 6.4.20,1 General Fire Zone 2SL 2K100 is located on the 852' 6" elevation of Unit 2 Safeguards. Room 2100 is the only Joorn in this fire zone. The combustible loading is-48,400 BUT/ft and the fire duration

< utilizing temperature curve C is 52 minutes with a maximum 2 temperature of 1500'F. The MPFL is limited to 80,000 BTU /ft ,

6.4.20.2 Dig.cussion Room 2 100 is a 751-ft 2 room with a combustible loading of' exposed cables and a fire hose station. .There is complete automatic sprinkler suppression in the room, ionization detection-is grovidedthroughoutandmanualsuppressioncapabilityisprovided y pertable extinguishers and hose stations 6.4.20.3 Results Cable trays-which support FZP, cables are not required to be ,

protected based on the following: .

The combustible loading is such that a C Curve fire could 1.

reach temperatures in excess of the critical temperatures of steel'if allowed to burn-freely without suppression being utilized. The arrangement and type of_ combustibles, ,

predominantly electrical cables in trays and a minor amount of lube oil in valves .is more conducive to a slow developing or smoldering fire which would be detected early at relatively low temperatures.

2. There-is complete automatic sprinkler protection (see-Section 1.5). There is also ionization detection throughout- >

and manual suppression capability is provided by hose stations and portable extinguishers.

3. There are administrative controls on the combusti es in these rooms which limit tae MPFL to 80,000 BTU /ft

4. The fire test conducted on FZR cable did not-have deterioration of exposed cable tray steel until the steel had been exposed to the test fire for over 40 minutes and had reached a_ temperature of-over 1600*F. Also, the test t was performed in'accordance with the-standard temperature curve (E-Curve) which is_more severe than would occur with the combustible loading. A fire in:this room would not reach the intensity level of the test even if no suppression was utilized and the-fire was allowed _to burn freely.

. - . . _ _ , . _ . - ~ , , _ __ a . . _ . . . , ._._ u. _._w, _a.c _. a. _ _. . m ., _ ~ ~ _ .~. a

e 2 FP 0085, Rev. 1 Page 40 of 40 6.4.21 FIRE ZONE 2S03 6.4.21.1 General Fire Zone 2S03 is a stairway which extends from the 773' 0" to the 860' 0" elevations in Unit 2 Safeguards. Each elevation had its own room number. The FZR cable passes through this zone ot, the 790' 6" elevation (Room 2-074A), The combustible loading is 8000 BTU /fta and the fire duration utilizing temperatures Curve C is 9 minutes with a maximum temperature of iOO'F. The MPFL.is limited to 37,300 BTU /ft2 due to Room 2 074A being non sprinklered.

6.4.21.2 Discussion Room 2 074A is the stairwell landing on the 790' 6" elevation.

There is negligibic combustible loading at this location. .The combustible loading for the zone consists mainly of a fire hose cabinet at the 773' 0" elevation and exposed cables at the 860'-0" elevation. There is no automatic sprinkler suppression so the room will be designated as "no storage". lonization detection is provided throughout and manual suppression capability is provided by portable extinguishers and hose stations.

6.4.21.3 Results FZR cable supports are not required to be protected based on the following:

1. The combustible loading is such that a C. Curve fire would not reach temperatures near the critical temperatures of steel if allowed to burn freely without suppression being utilized. The lack of combustibles in the room, the only combustibles beneath this area being an enclosed hose cabinet and the nearest significant combustibles.being located on the 860'0" elevation makes it extremely unlikely that any kind of fire will expose this cable.

2. There is no automatic suppression but the addition of suppression would not-improve on the ability of the supports to withstand the type of fire expected in thn room due in the very low combustible loading. There is ionization detection throughout and manual suppression capability is provided by hose stations and portable extinguishers.

3. There are administrative controls on the combustibles a in these rooms which limit the MPFL to 37,300 . BTU /ft and the room will be designated as "no storage".

/. The fire test conducted on FZR cable did not have deterioration of exposed cable. tray-steel until the steel had been exposed to the test fire for over 40 minutes ~and had reached a temperature of over 1600*F. Also, the test-was performed in accordance with.the standard temperature curve (E-curve) which is more severe than would occur with .

the combustible loading LA fire in.this room would not-reach the intensity level of the test even if no suppression was utilized and the fire-was allowed to burn freely.

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,. Cotton and waste paper storage (baied) and we66 ananged, non. -

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,, Paper ensiong processes, noncombusable building.

Noncombusable instNutional buildings with combustible occupancy. ,

Temperature Curve C (teodorutney Severe)  !

Wel6 arranged combustible storage, e.g., wooden pattoms, non.

combusable buddings.

Machine shop hawng noncombustible floors. 1 23 Temperature Curve D (Severs)

" Mar =_%nng areas, combusebie prooucts, noncomousebio a budding.

to Congested cembustible storage areas noncombusable buildeg.

30 3i n

] Temperatute Curve E (Standard Fire 8veure.--Severe)

Rammable liauids.

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34 Omce, combusable fumsture and iniidings. -

n Paper wor 6ang, prreng, etc.

n

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Fumsture manufacturing and finishing.

n Machine shop having con *=m floors.

NDlt: THIS P'IG U R E IS A REPRODUCTION \

., FROM FAGE 7-112.,NFPA '

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2 A T T A C H M E NJ T D 4

R AT E l DERIVATION Of# THE MAXtMUM F4 EAT RELEASE 5

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FOR A Ft R.G SuA81:eJG lt) ACCORDArJCE W ITH A

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