ML19208A940

Test to Qualify Cable & Pipe Penetrations in Fire Walls & Floors.

ML19208A940
Person / Time
Site:	Calvert Cliffs
Issue date:	09/14/1979
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML19208A939	List: ML19208A938 ML19208A940
References
PROC-790914, NUDOCS 7909180324
Download: ML19208A940 (14)

Text

PROCEDURE TEST TO QUALIFY CABLE AND PIPE PENETRATIONS IN FIRE WALLS AND FLOORS FOR CALVERT CLIFFS NUCLEAR POWER PLANT A. SCOPE:

Where cable trays, conduit and pipe pass through a floor or wall cpening, these openings are sealed with fire retardant materials and are considered to be an integral part of the wall or floor construction. Materials which have been used at Calvert Cliffs Nuclear Power Plant to seal openings and to serve as fire stops will be tested. In addition, other materials and systems which may be utilized in the future for seals er fire stops in fire-rated walls, barriers, and floors will be tested.

B. PURPOSE:

The purpose of the test is to evaluate existing penetration fire stop design and construction and to qualify them by test per ASTM E-119 - 1976 Standard Time-Temperature Curve at an independent test laboratory.

C. DESCRIPTION OF TEST MATERIALS:

1. A fire wall or floor construction having a three-hour fire resistance rating will be constructed (10 feet x 10 feet).

2. The attached Figure 1 shows the configuration of the test. Table 1 describes the system for each seal or fire stop.

3. Cable trays will be approximately 6 feet long x 2 feet wide x 3 inches high. The trays shall be galvanized rigid steel. Cable tray covers will be galvanized and installed as shown on Figure D-2.

4. Cable tray and cable will extend into the furnace a minimum of one foot and at least three feet beyond the wall on the unexposed side.

5. Cable loading in trays will be 50%, consisting of low voltage power, control and instrumentation cables, which will have silicone rubber insulation covered with glass braid and an overall asbestos braid jacket.

6. Conduit is 2 inch diameter rigid steel, galvanized schedule 40 pipe.

The system will consist of two penetrations and connecting conduit as shown in Figure 1.

7. Cable in conduit will have silicone rubber insulation covered with glass braid and an overall asbestos braid jacket which will be ener-gized to its design ampacity.

8. Pipe and sleeve penetration fire stop will utilize 6 inch diameter black iron schedule 40 pipe, capped and 10 inch diameter black iron pipe sleeve.

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7909180 N Y

D. DESCRIPTION OF TEST:

1. The fire stop configuration will be tested to the ASTM E-119 - 1976 Standard Time-Temperature Curve for a minimum of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

2. Following the fire endurance test of the fire stops, the assembly will be exposed to a hose stream for 2-1/2 minutes per 100 square feet of exposed surface. The hose stream will be a 1-1/2 inch nozzle set at a discharge angle of 300 with a nozzle pressure of 75 psi and a minimum discharge of 75 gpm with the tip of the noz-zie a maximum of 10 feet from the exposed surface.

3. A circuit cc.itinuity test will be conducted for the conduit / silicone rubber insulated cable assembly. Conductors will be energized to 120 volts and 480 volts and shall be connected to resistive loads before, duriig, and after the fire exposure and hose stream test.

E. ACCEPTANCE CRITERIA:

The Cable tray, conduit and pipe penetration fire stops are acceptable for use provided the following is met:

1. The fire stops withstand the fire endurance test as described with-out passage of flame and gases hat enough to ignite the cable or other fire stop materials on the unexposed side.

2. The fire stops withstand the hose stream test without the hose stream causing an opening through the test specimen.

3. The conduit / silicone rubber insulated cable assembly shall with-stand the fire endurance and hose stream tests to demonstrate cir-cuit continuity to perform its electrical function (i.e., without failing phase to phase or to ground) before, during, and after the fire exposure.

F. DOCUMENTATION:

The results, pass or fail, shall be recorded and supplemented with photographs and a statement of the conclusions drawn made by those conducting the test for the independent laboratory.

Installation methods will be described and will meet Quality Assur-ance Procedures as applicable to materials and installation methods.

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TABLE 1 A. FIRE STOPS FOR CABLE TRAY PENETRATION SYSTEMS THROUGH WALLS AND FLOORS (SEE FIGURE 1):

Tray No. 1: Cable tray fire stops will be constructed to simulate installed fire stops at Calvert Cliffs Nuclear Power Plant. (See Figure D-2)

In case the existing cable tray fire stop design fails the test, the following variations (modifications) will be tested simultaneously to study and modify existing cable tray stops.

Cable tray fire stops will be constructed the same as Tray No. I above but the following listed modification will be made prior to the tests.

Trav No. lA: Variation of Cable Tray Fire Stop Design shown in Tray No. 1. (See Figure D-2.1)

Tray No. IB: Variation of Cable Tray Fire Stop Design shown in Tray No. 1. (See Figure D-2.2)

Tray No. 2: The void space will be entirely filled with Dow-Corning's Silicone RTV Foam. (See Figure D-2.3)

Trav No. 3: An INTUMESCENT (VIHASCO P.O.F. 62-10) paint will be applied on the outside surface of the fire stops, trays and metal covers, on both exposed and unexposed surfaces.

Tray No. 4: In this test, an additional 6" space will be filled with silicone RTV foam. (See Figure D-2.4)

Tray No. 5: A sheet metal cover will be installed to protect the Flame-mastic from impact during the hose stream test. (See Figure D-2.5)

B. FIRE STOPS FOR WIREWAYS AND CONDUITS THROUCH CONTROL ROOM FLOOR (SEE FIGURE 1):

B_ lockout No. l_: Control Room floor penetrations will be constructed to simulate installed fire stops at Calvert Cliffs Nuclear Power Plant. (See Figure D-3)

In case the existing floor penetration fire stop design fails the test, the following variations (modifications) will be tested simultaneously to study and modify existing floor penetration fire stops.

Floor penetration fire steps will be constructed the same as Blockout No. 1 above but the following listed modifications will be made prior to the tests.

361113

Blockout No. 2: The Flamemastic coating at the top level of the floar will be opened to remove the loose vermicul.te to a depth of 10 inches and this space filled with silicone RTV foam. (See Figure D-3.1)

Blockout No. 3: A 3 inch noncombustible dam will be installed and filled with silicone RTV foam. (See Figure D-3.2)

C. CONDUIT / SILICONE RUBBER INSULATED CABLE:

Two rigid steel conduits will be grouted in place and interconnected by conduit two feet long. Multiconductor cable having silicone rubber insulation covered with glass braid and an overall asbestos briad jac-ket will be pulled in the conduit and will be connected to a power source and energized to its design ampacity to demonstrate its circuit continuity when exposed to flame and heat. (See Figure 1)

D. PIPE PENETRATION FIRE STOPS:

An 8 inch pipe installed in a 12 inch sleeve will be sealed to simulate pipe penetration fire stops at Calvert Cliffs Nuclear Power Plant.

(See Figure 1)

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TEST LAYOUT 2 NOTES:

MINIMUM 2 FT. THICK I3 / W ALL OR FLOOR

1. ALL TRAYS ARE TO BE 6 ROUTED IN s

g,-O'X 3*-O' BLOCK 0UT.

• #b 0 t' 0 S '- C " ,

l *- 9* 15' 3j - -

= -

2. FOR FIRE STOP DETAILS, REFER TO g 4"X 4' GALV. TABLE 1.

3 $9 STEEL WLREWAY

.r a l FOR DETAILS

[ t . .p f. o

3. SILICONE RUBBER LMSULATED CABLES 8

+g 2 t' v <

SEE FIG. D.3

, WITH ASBESTOS BR AID JACKET WILL f '

-_ BE TESTED IN CONDUlT. circuli J FOR DETAILS = --

t;-  ! ,' RIGID STEEL CONTINUITY WILL BE M AlHTAINED 3 SEE FIG. D-2. q*t b. U CONDUlT ONLY ON THESE CABLES, a I #lA l' - e l_ y n*

1 000 . FOR DETAILS j{ ,

I

• 18 1

. ";l SEE FIG. D.S I l #2 1

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ll FOR DETAILS 81 .

I =3 1 000 y - _[. SEE FIG. D.B.2.

63 BLOCK-0UT e l 4 l 'e US Gi O* A S'- 0" . 2*CONDUlTS WITH f3 g ,5 y CL _ _-_ _ _. D --- SillCONE RUBBER

, APPR01.1'-0"y g INSUL ATED WIRES

)3

. i_

j B' PAPE (CAPPED)

=

g.8 11' SLEEVE ( STD. PIPE) il ,

f p l 2'- O' d ,= =

34 L. BALTIMORE GAS & ELEC TRIC CO.

l # 0 '- 0*

I CALVERT CLIFFS NUCLEAR POWER PLANT e

h 9 2

FIGURE 1 FIRE STOP PENETRATION TEST SLAB LAYOUT h

r i"*

H-(n

t P

7 3 APPLICATION OF APPROX.Il /

'n WET FL AMEMASTIC 71 A

_4 - _&- // (FL AMEMASTIC./l S f .

6" THRIJ W ALL )

$ FLOOR (TYP.) g BLOCK 0UT IN FLOOR

/ -

/ OR WALL i , i i t /

I-e

,.["Tl iM' I lo

j. I'~ ~l 15i1 I I KA0 WOOL

( APPROX. S")

' I "D l ,I .

l l N

-- SOLID CABLE TRAY

/ 4- 4 - COVER p

- L ADDER TRAY TRAYS TO BE GROUTED IN POSITION AFTER CABLES AND COVERS ARE INSTALLED 3U1116 BALTIMORE GAS AND ELECTRIC COMPAW CALVERT CLIFFS NUCLEAR POWER PLANT ,

TYPICAL TRAY INSTALLATION THROUGH ELECTRICAL BLOCKOUTS FLOOR AND WALLS FIGURE D-2

s 3 APPLICATION OF APPROX./I[

f WET FLAMEMASTIC 7l A 3

_+- >c / ( SPR AN) TO FORM /e" DRY FLAMEMASTlC 6"THRU WALL ;

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& FLOOR (TYP.) / .

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e

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( APPROX 3")

lI l , . .

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'o } / 9 4 I v 4 -N

-- SOLID CABLE TRAY c -

>r- COVER

/_a

- L ADDER TRAY TRAYS TO BE GROUTED IN POSITION AFTER CABLES AND COVERS ARE INSTALLED NOTE'.

FIRE Si 5 WILL BE CONSTRUCTED OUTSIDE THE TRAY COVER.

361117 BALTIMORE GAS AND ELECTRIC COMP'NY CALVERT CLIFFS NUCLEAR POWER PL ,NT TYPICAL TRAY INSTALLATION THROUGH ELECTRICAL BLOCKCUTS FLOOR AND WALLS FIGURE D-2.1

3 APPLIC ATI0t10F APPROX.'/4" WET FL AMEM ASTIC ?l A 3

SPRAY) TO FORM $ / (SPRAY) TO FORM 3/e" DRY FLAMEMASTIC l!

/

/

& FLOOR 6"THRU (TYP.) WALL] <- BLOCK 0UT lN FLOOR f

, i i P i/

FILL WITH SILICONE ', <- l Oj i t RTV FOAM I l~31 1 1 7 KAOWOOL f, , , ( APPROX S )

lTEI b, ' -

! wi / '_ \ l

---

SOLID CABLE TRAY

/

/4 4- COVER

- LADDER TRAY TRAYS TO BE GROUTED IN POSITION AFTER CABLES AND COVERS ARE INSTALLED

% 1119 BALTIMORE GAS AND ELECTRIC COMPANV CALVERT CLIFFS NUCLEAR POWER PLANT TYPICAL TRAY INSTALLATION THROUGH ELECTRICAL BLOCKCUTS FL0nR AND WALLS FJGURE D-2.3

[SWETAPPLICATION

-LAMEMASTIC 7t A OF

// (SDRAY) TO FORM 3/e' DRY

_+- _+- // FL AMEMASTIC.

ll

[/

$ FLOOR6"THRU (TYP.) WALL) /! BLOCKOUT IN FLOOR

, :I m w/ / [

R WALL p ,, I g'f') . - ,['jy"1. I I

I .. 'l I iv P - K A0 WOOL lc ,

I l'l F II ( APPROX 5")

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/ FILL W TH SILICONE RTV

/ \ FOAM' SOLID CABLE TRAY j/

[ -h -

>- COVER j

/ LADDER TRAY TRAYS TO BE GROUTED IN P0stil0N AFTER CABLES AND COVERS ARE INSTALLED 3U11'30 BALTIMORE GAS AND ELECTRIC COMPANY CALVERT CLIFFS tlUCLEAR POWER PLANT TYPICAL TRAY INSTALLATION THROUGH ELECTRICAL BLOCKOUTS FLOOR AND WALLS FJGURE D-2.4

3 APPLIC ATION OF APPROX.I/4'

WET FL AMEMASTIC ll A

_4- _u- if FL (SPRAY)

AMEMASTIC. TO FORM %" DR l

6"THRtJ WALL 6 FLOOR (TYP.) 7 f- BLOCKOUT IN FLOOR

-[ -

/ OR WALL l t i I P /

f'~

l l~ l I

If l- f KA0 WOOL t ( APPROX. f)

I I IIl l 83 -

)\ see DETAIL SELow

/ j

- SOLID CABLE TRAY

+- COVER

/ /-&-

/-- L ADDER TRAY TRAYS TO BE GROUTED IN POSITION AFTER CABLES AND COVERS ARE INSTALLED y'

/

/ -

p

/ e g SWEET METAL FLAP

/ / h TR AY cone R s.] / B ALTIMORE GAS AND ELECTRIC COMPA+' ,:

p CALVERT CLIFFS NUCLEAR POWER PLANT TYPICAL TRAY INSTALLATION THROUGH ELECTRICAL BLOCKCUTS LAD ER TRW FLOOR AND WALLS F.lGURE D 2.5

WET FLAMEMASTIC li A SEAL TOFS OF CONDUlT WIREWAY WITH MIN. '/4 DRY FLAMEMASTIC ?t A (MASTIC)

A AROUND AND]\ 6

,' D W A R PACK WITH KAOWOOLs CERAMit FLEER -

( APPROX. 5")

1 i BLOCKOUT THRU SLAB i

FLOOR EL 45'-O'g j g jy((

• ^ ' l~ 1-l_ l l l11I < -

~

- FILL WITH I I~ bl~l i I I l l l ll -

Il I~l~IIII'lIl i*3 .. VERMICU LIT E 1-l~ll iI lil, .

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. 1 di nuo w i

\

i, ,

win ANCHORED WITH MACHINE I# 3 APPLICATION OF

[

SCREWS ( TYPICAL) APFROX. '4 WET FL AME-

/ MASTIC 7l A (SPRAY)

WIREWAY / TO FORM 3/e* DRY ALL CUN0Vn AROUND.

'i

/ MARINITE ( 36 A OR XL) (DRlLL HOLES $ CUTOUTS IN FlELD TO SULT WIREWAYS $ CONDUlTS)

% 1120 BALTIMORE GAS AND ELECTRit COMPANY CALVERT CLIFFS NUCLEAR POWER PLANT FIRE STOP & SEAL FOR WIREWAYS & CONDUIT THROUGH CONTROL ROOM FLOOR FIGURE D-3

4 SEAL TOPS OF CONDUlT AND, WIREWAV VitTH Mitt. '/[ DRY 4 .b

^ 6 ^

FLAMEMASTIC ll A (MASTIC) kk AROUND j

PACK WITH KAOWOOLs  !

CERAMit FLEER 'x  ; , ,

( APPROX. 5") \  !

N1 E j i BLOCKOUT THRU SLAB i

FLOOR EL 45'-Og }g E 7yp[

1 I ll Il Il I ',.

I' .' SEE NOTE I I=: I l_I l l l ll l l f..

i . .' .. V E R MIC U LlT E

.- I l I~I~I I I I I I I ll l-l~l I i i 1: I, .

(=

j 4 mao a z o: og g #

ARCHORED WITH MACHINE I# 3 APPLICATION OF SCREWS ( TYPICAL)

'# /! APPROX. '/g WET FL AME-MASTlt IL A (SPRAY)

WlREWAY TO FORM % DRY ALL CONDUlT / AROUND.

'i MARINITE ( 36 A OR XL) (DRILL

/

HOLES $ CUTOUTS IN FIELD TO SUIT WIREWAYS E CONDUlTS)

NOTE i. REMOVE VERMICULITE TO A DEPTH OF 10 INCHES $ FILL THE SPACE WITH SILICONE RTV FOAM.

I 3611'23 BALTIMORE GAS AND ELECTRit COMPANY CALVERT CLIFFS NUCLEAR POWER PLANT FIRE STOP & SEAL FOR WIREWAYS & CONDUIT THROUGH CONTROL ROOM FLOOF .

FIGURE D-3.1  !

^ ^ " '

SEAL TOPS OF CONDUlT AND WlREWAY WITH Miti. I/4" DRY

), b A 76 DPsY A R FLAMEMASTIC 7t A (MASTIC) AROUND FlLL WITH SILIC0t4E FTV FOAM- .

PACK WITH KA0 WOOL, k j CERAMIC FIEER N i '

( APPROX S") kNI,  !

! / BLOCKOUT THRU SLAB

\ m 31 I

FLOOR EL 4S'O"3 j% ~~p - 3 ;f (3.. SHEET METAL DAM

.< j

/- ' l~ l~i_ l 1 1 I 11 I l I~ I 'I

$ * F t L L V,'lT H l~lI I I ll l l A'

'<- .. V E R MICU LlT E I l I~I~I l~l~lI Ii Ii II 3 IIl l, .

h . .}

\

fa n//o m u a /,t % o ANCHORED WITH MACHINE II 3 APPLICATION OF SCREWS ( TYPICAL)

'# e' ! APPROX. '/4 " WET FL AME-f,' MASTit 7l A (SPRAY)

WIREWAY ,/, ' TO FORM 3/e* DRY ALL cot 1DUlT / AROUND.

'/i MARINITE ( 36 A OR XL) (DRlLL HOLES & CUTOUTS IN FIELD TO SUIT WIREWAYS E CONDUlTS) l

% 1.Ud4 BALTlMORE GAS AND ELECTRIC COMPANY CALVERT CLIFFS NUCLEAR POWER PLANT FIRE STOP & SEAL FOR WIREWAYS & CONDUIT THROUGH CONTROL ROOM FLOOE .

FIGURE D-3.2 l