ML20094J012

Fire Endurance Evaluation of Thermo-Lag Fire Barrier in Fire Area D-8

ML20094J012
Person / Time
Site:	Clinton
Issue date:	10/19/1995
From:	Scott Wilson ILLINOIS POWER CO.
To:
Shared Package
ML20094H993	List: ML20094J005 ML20094J008 ML20094J012 U-602512, Forwards Response to NRC RAI Re Thermo-Lag Installations
References
IP-M-0343, IP-M-0343-R01, IP-M-343, IP-M-343-R1, NUDOCS 9511150049
Download: ML20094J012 (26)

Text

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l CALCULATION COVER SHEET SnEET i OF ,7 l TITLE / DESCRIPTION: DEPT /DIV CALCULATION NO.  !

M/NSED IP-M-0343 l FIRE ENDURANCE EVALUATION OF THERMO-LAG FIRE BARRIER IN FIRE AREA D-8. QUALITY SYSTEM CODE TOPIC BLDG /ELEV/ AREA l l RELATED (or NA) (or NA)

(Q or N)

. O XD H98 DGR62 l

APPROVALS - NAME/ SIGNATURE /DATE l l

CORP PREPARING REVislON VOLUM E READY FOR INCORPORATION. ,

PREPARED BY Simon R. Wilson THIS REV. l IO llliq5 .- -

MICROFICHE ATTACHED:

DArs ,

sionATJRc CONFIRMATION REQUIRED l lYES NO PAGE NO(s) YES d NO CHECKED BY Br'an T. Ford i PRIVT VOL. INCORP. ASSGNMNT. Not Applicable l logMG '

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MOD. NA NA

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s4GNATURE ECN NA CR  !

2 COMMENTS: MWR NA )

REVIEWED BY Brian T. Ford l

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• E REVISION VOLUME READY FOR INCORPORATION CORP PREPARING ,

THis REV.

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/ / 1 DATE CONFIRM ATION REQUIRED MICROFICHE ATTACllED '

3,cy,3.gyt l l Y ES l l NO YES l NO PAGE NO(>) _ _ . _

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DATE EIGNATURE MOD. ECN CR COMMENTS: MWR l REVIEWED B' rRivt cs DATE SIGNATURE CORP PREPARING REVISION VOLUME READY FOR INCORPORATION:

h u PREPARED BY THIS REV I

Z PkiNT l lYES l lNO lN/A I I Dais siouATuns CONFIRM ATION REQUIRED MICROFICHE ATIACHED: j l l YES l l NO PAGE NO(6) . _ . _ _ _ _ . _ _ . . _ l YES NO CHECKED BY

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• VOL. INCORP. ASSGNMNT. i ;

I l l DAT E ElGNATURE MOD. ECN CR i COMMENTS: Mwn l

REVIEWED Bi PRINT I I DALE $1GN ATt'R E 9511150049 951103 PDR ADDCK 05000461 P PDR

CALCULATION COVER SHEET SnEETAF .1Er3w 4 0 id I

TITLE /DESCRIFFION: DEPT /DIV CALCULATION NO. I L ~ 5 61't I M/NSED IP-M-0343 FIRE ENDURANCE EVALUATION OF THERMO-LAG FIRE BARRIER IN FIRE AREA D-8. QUALITY SYSTEM CODE TOPIC BLDG /ELEV/ AREA  ;

RELATED (or NA) (or NA) )

(Q or N) )

. O XD H98 DG/762 i APPROVALS - NAME/ SIGNATURE /DATE ARING REVISION VOLUME READY FOR INCORPORATION:

PREPARED BY b i mom k . Dtd .g.HIS EV lt /ggig Q_k,Ms IP 0 NA l YES lNO X N/A CONFIRMATION REQUIRED MICROFICHE ATTACHED:

g 7, g l lYES l X l NO PAGE NO(s) YES X NO uw. ma.,ruu) AM, CR TKH MC (m NA)

COMMENTS:

REVIEWED BY hit NN "#

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APPROVED BY 8M f. 8H AT NRC GL 92-08. l lL/ID99 NAY i COU PREPARING REVISION VOLUME READY FOR INCORPORATION:

p p YES NO N/A

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CHECKED BY l lYES l l NO PAGE NO(s) l l YES l l NO uw. mu Iu2o Au, ca ucu mc 4 wA3 COMMENTS:

REVIE%TD BY

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APPROVED BY S / /

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PREPAREDBY H R

$ l lYES l lNO l lN/A CONFIRMATION REQUIRED MICROFICHE ATTACHED:

CHECKED BY YES l NO

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COMMENTS:

REVIEWED BY

/ /

APPROVED BY

/ /

Page 3 of U REVISION HISTORY i Dept./Div. NSED1Dso__ Calc. # IP.-M-0343 I Revision 01 Volume (if applicable) N/A Objective: To correct _editoriaLerrors.

l Reason: due to erlitarial errors. _

I List of Affected Pages: All .

I 1

Revision Volume (if applicable) l Objective:

I l

Reason:

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List of Affected Pages:

l Revision Volume (if applicable) _ _ . _ _ . . _ . . . . . _ _

Objective:

Reason:

List of Affected Pages:

NF-303 (10/95)

l NSED/Desien & Analysis /Thermo-Lac Proicct IP-M-0343 R/l Pagedof1]

1 TABLE OF CONTENTS SECTION PAGE REVISION 1 COVER SHEET 1 REVISION 0 COVER SHEET 2

. REVISION HISTORY 3 TABLE OF CONTENTS 4 1.0 OBJECTIVE 5 2.0 DEFINITIONS 5 3.0 ASSUMPTIONS 5-6 J 4.0 METHODOL.OGY 6

5.0 REFERENCES

6-8 6.0 EVALUATION / ANALYSIS 9-15 7.0 JUSTIFICATION ANALYSIS 16-17 i

8.0 RESULTS / CONCLUSIONS 17 l l

ATTACHMENTS:  !

' A) AS-BUILT CONDUlT CONFIGURATION THAT IS ( l page )

PROTECTED BY THERMO-LAG 330-1 FIRE BARRIER  :

(The original installation drawing was marked up for this cale. to show l additional dimensional details)

]

B) APPLICABLE INSTALLATION DETAllS FROM

- VENDOR MANUAL K-10003-0002 AND BISCO INSTALLATION MANUAL ( 4 pages )

C) THERMO-LAG MATRIX (EXCERPT FROM REFERENCE 2) ( l page )

D) Tabulation of NEI Thermocouple data. ( Excerpt of Ref.4 data) ( l page )

E) RECORD OF COORDINATION ( R O C ) Y-104476 ( l page )

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I 1.,0 OIUECTIVE:

1 As noted in NRC Generic Iztter 92-08 and 92-08 Supplement 1, Thermo-Lag 330-1 firewrap i material produced by Thermal Science, Inc.( TSI), has repeatedly failed to meet the manufacturer's claims with regard to fire rating. Additionally, baseline qualification tests

]

performed by TSI have been discredited due to lack of pertinent detail and testing QA control. i Subsequent tests of Thermo-Lag have been performed for Nuclear Energy Institute (NEI) which have the necessary controls and configuration details, and these tests provide very detailed installation drawings and temperature data which can be used to determine a minimum expected fire endurance rating of installed Thermo-Lag.

l The purpose of this analysis is to qualify the minimum expected fire endurance rating of the Thermo-Lag fire barrier system installed on 5"O conduits C92118 and C92120 in CPS Fire Area D-8. The original design intent was to provide a 1-hour rated fire barrier for these conduits.

2.0 DEFINITIONS

1. Exposure fire - A fire initiated and propagated by some fuel source other than the referenced item.

2. Maximum allowable temperature limit - From Reference 6, similar thermocouples are allowed to rise an average of 250 F above ambient, and any one thermocouple is allowed to rise 325 F above ambient.

3. Reference 1 defines industry terms applicable to Thermo-Lag.

4 Reference 2 defines CPS-specific terms applicable to Thermo-Lag.

5. Reference 3 defines CPS-specific Safe Shutdown Methods.

3.0 ASSUMPTIONS

1. Where exact determination of commodity or barrier parameters cannot be accomplished without barrier dismantling, the more-limiting value for the parameter is assumed. I These individual assumptions area identified as such in the evaluation sections. I

2. As documented in CPS Thermo-Lag turnover packages, certain parameters were inspected by QA personnel upon installation. These parameters will be assumed to be unchanged from their inspected status when no other source (i.e., design, walk down document, etc.) can positively determine the parameter's value.

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3.0 ASSUMPTIONS (Continued) l 3., Although the Vendor Manual states that the prefabricated Thermo-Lag 330-1 used at CPS contained V-Ribs at 6" centers, it is not possible to verify this statement without

. destructive examination. It is therefore conservatively assumed that V-Ribs are not used in the CPS installation.

4.0 METIIODOLOGY

1. Define individual fire barrier system segments of the subject item.

2. For each individual fire barrier system segment of the subject item, use the  !

methodology from Reference 1 to perform a detailed comparison of as-installed i

- parameters from Reference 2 to as-tested parameters from Reference 4. Determine the minimum fire endurance rating of each fire barrier system segments by limiting parameter, where the rating is the time just before the measured temperature exceeds its maximum allowable limit.

3. Determine the minimum fire endurance rating of the fire barrier system for this item by the limiting segment.

5.0 REFERENCES

1. NSED Standard ME-09.00 Rev. I dated 7/27/94, "Thermo-Lag 330-1 Fire Endurance Application Guide" , Nuclear Energy Institute.

l l 2. U-602250, Illinois Power's Response to the Nuclear Regulatory Commission's Request for Additional Information Regarding Generic Letter 92-08, "Thermo-Lag 330-1 Fire Barriers," dated 2/9/94.

l

3. NSLD Calculation CL-FP-SS-1 Rev. 2, Identification of Safe Shutdown Systems, dated 1/21/86.

l 4. NEI Test 2-1, Fire Endurance Test of Thermo-Lag 330-1 Fire Protective Envelope (6 in.,4 in.,2 in., & 3/4 in. Aluminum Conduit Assemblies), Omega Point Laboratories, dated April 7,1994.

! 5. NSED Calculation IP-M-0182 Rev. 2, Heat Content Values for Cable Insulation (SLICE cable trays and free-air).

I

6. ASTM El19-88, Standard Test Methods for Fire Tests of Building Construction and Materials, American Society for Testing and Materials.

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NSED/Desien & Analysis /Thermo-Lac Proicct IP-M-0343 R/l Page]of{9 1 1

i 5.0 REFERENCE (Continued) 7., USAR Appendix F Section 3.4.8.

8., Vendor Manual K-10003-0002 [ BISCO- Fire Barrier ( Thermo-lag) Installation], .

Rev.0, dated 8-14-91.

l 1

9. K-2999 Electrical Installation Specification, amendment 15, dated 05-30-86.

10. . BISCO - Turn over package for D-8 Fire Area in Diesel Generator Building 762'-0" ,

dated 03-03-86.

11. ME-08-00 Rev. O " Thermo-Lag 330-1 Combustibility Evaluation Methodology Plant Screening Guide" dated 7-25-94.

12. K-2980 Cable Tray and Supports Amendment 6, dated 04-25-86.

13. Record of Coordination ( R O C ) Y-104476, " Telephone conversation dated November 14 and 21 1994 between R.P. Bhat and S. R. Wilson of IPC with Mr. C.

Banning of Vectra".

14. Texas Utilities Electric Comp. (TUEC) Scheme 9-1, Fire Endurance Test of a Thermo-Lag 330-1 Fire Protective Envelope ( % in.,3 in., and 5 in. Conduits with Radial Bends ), Omega Point Laboratories, dated November 23,1992.

15. Field Change Request (FCR) No. 45633 " Fire Barrier " dated 3-17-86.

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6.0 EVALUATION / ANALYSIS:

Tijermo-Lag Barrier System: Conduits C92118 and C92120 and associated thermal shorts (includes supports).

Location: Fire Area D-8, consists of the Division 1 diesel generator ventilation fan room and air intake located along the south wall of the diesel generator building at elevation 762 feet 0 inch.

Purpose of Thermo-Lag: The main power feed cables IDG31 A and IDG31B for the Division 2 diesel generator are routed in conduits through this area along the south side, and are protected by a 1-hour fire rated Thermo-Lag 330-1 material.

Basis: In order to preclude the possibility of a fire destroying both Division 1 and 2 cables that serve safe shutdown equipment, the Division 2 cable were protected with a material that has a 1-hour fire rating.

A walk down of Fire Zone D-8 revealed that the structural integrity of the fire barrier wrappings on conduits C92118 and C92120 appear to be intact.

l Installation of the Preshaped Conduit section desien ( Procedure No. SP-FBI-01 Rev. 3 dated 3-28-86. Ref.8)

This is a description of the installation method used to install the principal commodity (i.e.,

Fire Barrier for Conduits) at CPS.-

I The edges on one (1) of the one hour fire rated Thermo-Lag preshaped conduit sections are l precoated with 1/4 to 1/2 inch bead of Thermo-Lag 330-1 Subliming Trowel Grade Material. l l

The coated section is mounted on the other one hour fire rated section on the conduit with the edges flush with each other to form a cylindrical section around the conduit. The two sections are fasten together using 14 ga. minimum stainless steel tie wires or 0.5" x 0.020" minimum banding material at a maximum of twelve (12) inch intervals as shown in attachment B.

A 1/4 to 1/2 inch bead of Thermo-Lag 330-1 Subliming Trowel Grade Material is applied to ,

the end of the installed section, and the next section is attached, making sure that the ends are butted and flush.

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d 6.0 EVALUATIONS / ANALYSIS (Continued)

Tije applicable commodity tested, its fire resistive barrier construction and its tested acceptance basis are as described in References 4 & 14 and are tabulated below:

Commodity Tested Fire Resistive Barrier Test Acceptance Basis Construction NEI Test 2-1, Ref. 4. 0.5 in. nominal pre- Satisfactory bare conductor 4" O standard weight rigid shaped Thermo-Lag 330- temperatures when test stopped at 50 aluminum conduit. I sections, pre-buttered minutes. No thermocouple exceeded Thermo Couples 220-233 joints. the temperature requirements.

However the average temperature was exceeded at 47 Min. ( See attachment D) Prior to the Hose Stream test no openings were observed, following the Hose Stream test the Thermo-Lag pieces remained affixed and the stainless steel banding was sagging slightly from the assembly.

TUEC Scheme 9-1, Ref.14 0.5 in. nominal pre- Satisfactory surface conduit 5" O rigid steel conduit. ( shaped Thermo-Lag 330- temperatures, barrier conditions, cable Horizontal section only, I sections, pre-buttered visual inspection, and cable Thermo Couples 122-127) joints, with TSI 350 functionality after 60 minutes. No Topcoat applied. failure openings or other severe damage was noticed prior to the Hose Stream test, following the Hose Stream test the Thermo-Lag pieces remained firmly affixed and the stainless steel banding was still tightly wrapped around the assembly.

The comparison to the Ref.14 TUEC Test was made mainly due to the application of the TSI 350 Topcoat on the wrapped commodity, however due to the uncertainty related to the actual material thickness, the NEl Test was use in this conclusion.

Segment ID Segment Description D8-01 Two 5* O steel rigid conduits C92118 & C92120, extending for 38'-2" in a horizontal orientation from wall penetration on the west side of the room to wall penetration on east side of the room, each supported by five supports (CC63D-H & CC64D-H) , wall interface consisting of Thermo-Lag panel pieces bolted to the wall ( See Attachment B for installation details).

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NSED/Desien & AnalysisfThermo-Lac Project IP-M-0343 R/l Page ! O of G  ;

t FIRE BARRIER SYSTEM: C92118 & C92120 }'

FIRE ZONE

D-8 (Diesel Generator Bld*g El. 762'-0",1 Ilr. rating)

SEGMENTS: D8-01 l l

AS-BUILT TESTED CONFIGURATION (S) COMPARISON EVALUATION LIMITING ENDURANCE  !

PERFORMANCE PARAMETERS CONFIGURATION UTILIZED FOR EVALUAT10N (Ref. 4) ,

Conduit. Conduit Same. See other parameters.

COMMODITY TYPE

[

I 5 in diameter. 4 m diameter. Smaller tested size bounds larger size See other parameters.

COMMODrfY SIZE due to lower thermal capacity, lower f

thermal resistance.

Steel. Aluminum. Aluminum tested conduit bounds Test was terminated at 50 COMMODITY MATERIAL (Rigid. zine coated hot-dip, installed steel conduit due to lower minutes,'none of the tenno galvanized per ANSI Spec. thermal capacity and higher thermal couples in the segment of l conductivity of aluminum. NEI Test 2- intcrest (i.e.,220-223)

C80.1) i Thenno Couples 220-233. exceeded temperature  ;

limits when the test was tenninated.llowever the  ;

average temperature was >

exceeded at 47 Min.

Thermal mass ofinstalled See other parameters.

COMMODITY CONTENTS Conduit = 13.140 #/ft (Ref 9)

Cables = 11.248 #/R configuration is greater than tested configuration, and is therefore i (Ref.1 & 5)  ;

Total = 3.40 #/ft bounded, due to its higher internal Total = 24.388 #/n thermal capacity.  !

llorizontal llorizontal NEl Test 2-1 (Thermo Couples Same. 46 minutes.

COMMODITY ORIENTATION 220-233)

Thermo-Lag 330-1, pre-shaped 'lhermo-Lag 330-1, pre-shaped conduit Same, except no V-ribs on panel pieces See panes 12-14 for BAIUUER TYPE conduit half round sections I half round sections 1 IIr. rating for the for CPS hanger installations, however, evaluation of barrier with <

Iir. rating for the conduit conduit sections. Support sections were the presence of V-Ribs on the panel Topcoat.

i sections. Support sections . Thermo-Lag 330-1 prefabricated panel pieces have no impact on the thermal

' were Thermo-Lag 330-1 sections with V-ribs,1lir. rating. or structural chanKteristics in this prefabricated panels, ilIr. configuration, mainly due to the short l rating. unsupported spans. No Topcoat ,

TSI 350 Topcoat applied. applied to NEI tested configuration. l I

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NSED/Desien & Analvsis/Thermo-Lac Project IP-M-0343 R/l Page](ofI]~

FIRE BARRIER SYSTEM: C92118 & C92120 FIRE ZONE: D-8 (Diesel Generator Bld'g El. 762'-0*, I fir. rating) -

SEGMENTS: D8-01 PERFORMANCE AS-BUILT TESTED CONFIGURATION (S) COMPARISON EVALUATION LIMITING ENDURANCE PARAMETERS CONFIGURATION IfflLIZED FOR EVALUATION (Ref. 4)

Min 1/2" 1/2" Nominal,(0.5 +R125-0 0) Installed Thermo-Lag is botmded by See other parameters.

BARRIER TIIICKNESS Mat unknown tested T.L, since installed thickness is at least same as test.

( See R O C. Y-104476 )

V-Ribs is not apphcable to V-Ribs is not applicable to conduit pre- Same, except no V-Ribs on panel 46 Mmutes BARRIER STIFFNESS V-RIB LOCATION & ORIENTATION conduit pre-shaped sections. shaped sections. pieces for supports, the presence of V.

No V-Ribs on panel pieces for V-Ribs on panel pieces for supports. Ribs on the panel pieces have no supports. impact on the thermal or structural characteristics in this configuration, mainly due to the short unsupported spans.

Inside face of the panel. Inside face of the panel. Same. See other parameters.

BARRIER STRESS-SKIN LOCAllON Precoated edges with 330-1 330-1 T.L. Trowel grade used to eaulk all NEl Test 2-1 Thermo Couples 220-233. 46 Minutes BARRIER JOINT TYPE Thermo-Lag trowel grade joints and seams between panels (Pre- on 4"O conduit.

material and butt joined at Buttered butt joints) on straight run ends (Pre-Buttered butt joints) sections BARRIER FASTENERS TYPE,  %"x.020" Stainless Steel  %" wide Stainless Steel band 0.020* thick, Tested bounds installed. See other parameters.

SPACING AND DISTANCE banding with %" wing seals wing seals,2" on each side of panel, butt-FROM JOINT. #202SS 10" O C. Mat joint at 12" interval.

spacing,2* max spacing from joints.

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IP M-0343 R/l Page I Lof (

NSED/Desien & Analysisffhermo-Lac Proicct_

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FIRE BARRIER SYSTEM: C92118 & C92120 '!

FIRE ZONE: D-8 (Diesel Generator Bld*g El. 762*-0", I Hr. rating)

, SEGMENTS: D8-01 AS-BUILT ... TESTED CONFIGURATION (S) COMPARISON EVALUAT10N LIMmNG PERFORMANCE ENDURANCE PARAMETERS CONFIGURATION UTILIZED FOR EVALUATION (Ref. 4) 12" Max. Shorter distance bounds installed See other parameters.

BARRIER UNSUPPORTED 10" Max.

configurations.

SPAN This was a base-line test, no upgrades in Same. See other parameters.

BARRIER JOINT None specified in mstallation or inspection details. the form ofjoint re-enforcement was REINFORCEMENT t performed.

One hour rated Thermo Lag 330-1 V- Shorter distance from conduit envelope See other parameters  !

BARRIER STRUCTURAL AND llangere wrapped per detail 5 '

& 6 Attachment B. using Ribbed Panel material coverage extending bounds instaIIed configurations. The INTERVENING STEEL Thermo-Lag 330-1 at a 9" distance from the conduit presents of V-Rib does not affect the PROTECTION prefabricated panel 0.5" mm protective envelope. structural or thermal integrity of the (llangers, Non-Dedicated Conduits, ConduitAVall thickness , wrapped from the urapped commodity in this point where the hanger configuration. ,

Interface) supports the conduit all the way to the point the support

• attaches to the auxiliary steel.

No intervening steel present.

Not specifically tested. See section 7.0, item I for acceptance 46 minutes.

ConduitAVall Interface =>

f I hour rated contiguration justification.

desenbed in section 7.0, r item 1.

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I FIRE BARRIER SYSTEM: C92118 & C92120 FIRE ZONE: D-8 (Diese! Generator Bld'g El. 762*-0,1 IIr. rating)

SEGMENTS: D8-01 i

PERFORMANCE AS-BIIILT TESTED CONFIGURATION (S) COMPARISON EVALUATION LIMITING ENDURANCE  !

PARAMETERS CONFIGURATION LIITLIZED FOR EVALUATION (Ref.14) .[

COMMODITY TYPE Conduit. Conduit. Same. See other parameters i

COMMODITY SIZE 5 in. diameter. 5 in. diameter. Same. See other parameters. ,

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COMMODITY MATERIAL Steel. Steel, rigid. Same. See other parameters (Rigid, zinc coated, hot-dir,  ;

galvanized per ANSI Spec. j C80.1). ,

COMMODITY CONTENTS Conduit = 13140 #/t1(Ref 9) Conduit = 13.70 #/ft lhennal mass ofinstalled Sce other parameters. j Cables = 11.248 #/t1 Cables = 6 71 #/11 configuration is greater than tested i configuration, and is therefore Total = 24.388 #/11 Total = 20.4 i #/IT bounded, due to its higher intemal 'i thermal capacity. .

! COMMODITY ORIENTATION llorizontal llorizontal (Thermo Couples 122-127).- Same. 60 minutes.

BARRIER TYPE Thenno-Lag 330-1, pre-shaped Thenno-Lag 330-1, pre-shaped conduit Same, except no V ribs, the presence See other parameters.

conduit half round sections I half round sections I lir. rating for the of V-Ribs on the panel pieces have no lir. rating for the conduit conduit sections. Support sections were impact on the thermal or structural sections. Support sections Thenno-Lag 330-1 prefabricated panel characteristics in this configuration, were Thenno-Lag 330-1 sections with.V-ribs, Ilir. rating. mainly due to the short unsupported prefabricated panels, Ilir. TSI 350 Topcoat applied. spans.  ;

rating.

TSI 350 Topcoat applied.

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-_- ___=-__-__-____________- __- _ _ _ _ _ _ _ _. __. . _ . - - - - -- . - . _ . - --

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l FIRE BARRIER SYSTEM: C92118 & C92120 FIRE ZONE: D-8 (Diesel Generator Bld'g El. 762'-0", I Hr. rating) i SEGMENTS: D8-01 l

l PERFORMANCE AS-BUILT TESTED CONFIGURATION (S) COMPARISON EVALUATION LIMIENG ENDURANCE PARAhETERS CONFIGURABON ITI'ILIZED FOR EVALUATION (Ref.14) t BARRIER DIICKNESS Min.1/2' 5/8" Nommal,(0.625 +/-0.125) per Ref. Installed Hermo-Lag is bounded by See other parameters.

Max. unknown 1.0 Appendix C, page C-5. Ref.15 test tested T.L, since installed thickness is report indicates 1/2" nominal. at least same as test.

( See conclusion sect. 8.0)

BARRIER STIFFNESS V-RIB V-Ribs is not applicable to V-Ribs is not applicable to conduit pre- Same, except no V-Ribs on panel See other parameters.

LOCARON & ORIENTATION conduit pre-shaped sections. shaped sections. pieces for supports the presence of V-No V-Ribs on panel pieces for V-Ribs on panel pieces for supports. Ribs on the panel pieces have no supports. impact on the thermal or structural i

characteristics in this configuration, mainly due to the short unsupported spans.

BARRIER STIESS-SKIN Inside face of the panel. Inside face of the panel. Same. See other parameters 1.OCATION BARRIER JOINT TYPE Precoated edges with 330-1 330-1 T.L. Trowel grade used to caulk all Average temperature increase at 60 60 minutes.

Hermo-Lag trowel grade joints and seams between panels (Pre- minutes was less than 250*F ( 246*F material and butt joined at Buttered butt joints)on straight run vs.250*F ). t ends (Pre-Buttered butt joints) sections. TUEC Scheme 9-1,5" in.

conduit , Reimo Couples 122-127.

BARRIER FASTENERS TYPE,  %"x.020" Stainless Steel  %* wide Stainless Steel band 0.020' thick, Tested bounds installed. See other parameters.  !

SPACING AND DISTANCE banding with %* wing seals wing seals,2" on each side of panel, butt-FROM JOINT. #202SS 10" O.C. Max. joint at 12" interval.

I spacing 2* max spacing from .

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t C92118 & C92120 5 FIRE BARRIER SYSTEM:

FIRE ZONE: D-8 (Diesel Generator Bld'g El. 762*-0", I Hr. rating) j SEGMENTS: D8-01 ,

PERFORMANCE AS-BUILT TESTED CONFIGURATION (S) COMPARISON EVALUATION - LIMIENG PARAhETERS CONFIGURATION UTILIZED FOR EVALUATION (Ref.l.8) ENDURANCE BARRIER UNSUPPORTED 10" Max. 12" Mat Shorter distance bounds installed See other parameters. [

SPAN configurations.

BARRIER JOINT None specified in installation Upgrades to the 5"O conduit were only to Same. See other parameters. i REINFORCEMENT or inspection details. the radial and lateral bends, no upgrades to the horizontal sections.

BARRIER STRUCTURAL AND llanger=> nrapped per detail 5 One hour rated Thermo Lag 330-1 V- Shorter distance from conduit envelope See other parameters. t INTERVENING STEEL & 6 Attaclunent B, using Ribbed Panel material coverage extending bounds installed configurations. The PROTECTION Thermo-Lag 330-1 at a 9" distance from the conduit presents of V-Ribs does not alTect the (l{ angers, Non-Dedicated prefabricated panel 0 5" min. protective envelope. structural or thermal integrity of the Conduits, ConduitAVall thickness , wrapped from the wrapped commodity in this i Interface) point where the hanger configuration.

supports the conduit all the way to the point the suppon attaches to the auuliary steel. ,

No intervening steel present.

ConduitAvallInterface=> 1 Not speciGeally tested See section 7.0, item I for acceptance 60 minutes.

4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> rated con 0guration justification. ,

desenbed in section 7.0, item l.

I i

___._____________________________.___.m _--___.._.u.___ . _ -.. _ _ _ _ _ _ _ _ __ _ _ _ _ . _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _

d NSElWesien & Analnisffhermo-I,ae Project IP-M-u343 R/l Page ((o of ]

I I 7.0 JUSTIFICATION ANALYSIS:

Th'e following are justification analysis for the performance parameters that were found to be unbounded or configurations that were not specifically tested. ,

l 1 The installation of the interface between the conduits and the wall Penetration (Attachment B page 1) is as follows:

a) The conduits are covered with Thermo-Lag 330-1 preshaped conduit sections as previously described in section 6.0 and illustrated in Attachment B , is flush to the wall penetration.

b) A piece of prefabricated Thermo-Lag panel is cut large enough to allow for the installation of concrete fasteners. Holes for conduits that penetrate the wall are cut out l from the panel piece as required. The sections created by the cutting out of the one piece are such that each piece can be fastened to the concrete wall using %"xl%"

Tapcon Screws of sufficient length to ensure %" concrete penetration, and carbon steel washer / plates .

c) The sections are mounted to the concrete wall using at least two fasteners per section at a maximum interval of 12".

d) Sufficient amount of Thermo-Lag is applied to cover the bolt heads of the concrete fasteners with the %" min. envelope thickness.

e) The installation is than completed by filling in all edges and joints with Thermo-Lag 330-1 Subliming Trowel Grade material.

There are no external forces acting on the vertical Thermo-Lag pieces. From a walkdown of this area, it appears that there are four separate pieces butted together with the seams running vertically to form the cover for the face of the penetration. It appears that each piece mounted by two Tapcon screws. The size of each piece is conservatively estimated as 12" X 12" ( Ift2 ),

The weight of %" thick Thermo-Lag panel is approximately 5.25 Lbs/ft2 (Ref.11), it is calculated that the maximum force per screws is approximately 3 lbs. This force produces negligible stresses compared to the tensile and shear stress allowables of the

%" screws, the punching shear effect of the bolts trying to punch / pry through the Thermo-Lag is minimize due to the stress skin and the washer / plate arrangement utilized in this installation. Hence the bolts are considered adequate to support the Thermo-Lag pieces and therefore maintained the butt joints and seams together.

The Thermo-Lag cover of the penetration is not impacted by fire fighting or interaction of falling debris due to its mounting flush against the wall.

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-. . ~_- -- - .- . . . . . - .-- - .- - _ .- . -

NSED/Desien & Analysis /Thermo-l,ae Proicct IP-M-n343 R/1 'Page (]of t]

i 7.0 JUSTIFICATION ANALYSIS (Continued) i

! Of critical importance in this evaluation is the structural integrity of the vertical l ,

sections of Thermo-Lag panel to ensure that the joints surrounding the conduits where l- the Grewrap conduits penetrate the Penetration will remain intact during a fire.

The construction of the joint interface between the wall mounted Thermo-Lag and wrapped conduits is an overlapping of two pieces and as such it exhibits better thermal protection characteristics than the butting of pieces of Thermo-Lag together methods used in the Reference 4 & 14 NEI & TUEC tested conduits . Hence these joint formations are considered bo'unded by thejoint configuration of the test.

It is therefore concluded that the structural and thermal integrity of the installed configuration is at least supported by the test until temperature criteria were exceeded or test was terminated, (i.e.,46 or 60 minutes), including the Hose Stream test.

8.0 RESULTS / CONCLUSIONS:

Based on parameter comparison of the segment in Sections 6.0, the installed configuration is bounded by the 4"O Aluminum conduit configurations in NEl Test 2-1 or the 5"O Steel conduit con 6guration in TUEC Scheme 9-1 with the exception of the specific commodity and i configuration deviation that are analyzed in Section 7.0. l Justification provided in Section 7.0 shows that the items described therein exhibit  !

characteristics and attributes that are comparable to tested configurations and are therefore j supported by the NEl Test 2-1 or TUEC Scheme 9-1 Test Reports, until temperature criteria were exceeded or test was terminated, (i.e.,46 or 60 minutes).

The comparison to the Ref.14 TUEC Test was made mainly due to the application'of the TSI 350 Topcoat on the wrapped commodity, however due to the uncertainty related to the actual ,

material thickness, the NEI Test was used in this conclusion. However, it appears that the I application of Topcoat on the fire barrier material used in the Ref.14 TUEC Test, did not have a significant impact on the test results. l

)

In conclusion the installed CPS configurations of conduits C92118 and C92120 in Fire Area D-8 that are protected by Thermo-Lag fire Barrier System, would conservatively meet the temperature acceptance and structural integrity criteria in accordance with NEI Test for 46 i minutes of fire duration, u,a

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Illinois Power Company.

Nuclear Station Encineerine Department P. O. Box 678 Clinton. IL 61727 AWM4 EAlT E. .

(217) 935-8881 i l

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RECORD OF COORDINATION l Y-104476 Prepared by R P. .R. WilsondN ' Date 11/21/94 Copies to B.T. Ford File Code Bsi-18co.94f11-21)-e RCCL No.

l Meeting Telecon X Other Date 11/14/94 and 11/21/94 -

Time 0900 and 1100 l

l Participants R.P. Bhat (NSED). S.R. Wilson (NAD). and Cat Banning. Vectra. (817) 737-1145 1

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Subject Thermo-Lag Panel Thickness NEl Tested vs. CPS As-Installed.

SUMMARY

l The following question arose during the generation of the CPS AS-Installed Thermo-Lag Fire Endurance f

calculations.

l l

The NEl Test samples are stated to be 1/2" nominal with tolerance of +1/8", -0", and 1" nominal with tolerance of

+1/4",-0". The CPS purchase specifications called for 1/2"and 1" minimum panels. Would the NEl tests be applicable to CPS 7 I

l Ram called Cal on 11/14/94 and Simon called on 11/2114. Mr. Banning was called because he was the prime i techical coordinator for NEl during the TSI-NEl fire tests conducted at Omega Point Labs. Cat stated that the l

+1/8", -0" and 1/4", -0" tolerances were provided because QA acceptance criteria for the panels required tolerances.

There was a special effort made during the NEl tests to ensure that the panels were closer to 1/2" and 1". This was done by shaving off excess materialin some cases.

The NEl 1/2", +1/8",-0" and 1", +1/4". -0" panels muld envelop the CPS panels because CPS panels were at i least 1/2" and 1" thick.

j ATTACHMENT A.3-1

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FILE D2194(/M -/ -L- f CALCULATION #

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FORM NUMBER TITLE / DESCRIPTION NF-258 NSED COMMENT CONTROL FORM NF-2141 & 2 DESIGN VERIFICATION CHECKLIST -

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