ML19281A094
| ML19281A094 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 02/14/1979 |
| From: | Banta F CINCINNATI GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19281A091 | List: |
| References | |
| 78-9-FP-1, NUDOCS 7903060195 | |
| Download: ML19281A094 (67) | |
Text
HUSKY PRODUCTS, INC.
FLORENCE, KENTUCKY ENGINEERING REPORT NO. 78-9-FP-1 FIRE PROTECTIVE CABLE TRAY FIRE TESTS SEPTEMBER, 1978 THROUGH JANUARY, 1979 FOR WM. H. ZIMMER NUCLEAR STATION PREPARED BY: NO N "
Fred L. Banta Sworn and subscribed to before me this 14th day of February, 74-W . . _ _
U
. NOTAI6i PUBLIC OF KENTUCd Netary l'abhe, Kor.tucky, State at (Aree ta C$mminice D ' es tiow. 27. D 12 Copyrighted, Husky Products, Inc.
Division of Burndy Corporation, 1979 7003060/96;
r~m en j^ *~
1 THE CINCINNATI GAS & ELECTRIC COMPANY c71-CINCINN ATI. OHIO 45201 E*. A. B O RG M A N N vict Patsiormt Docket No. 50-358 March 1, 1979 Mr. Harold Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 RE: WM. H. ZIMMER NUCLEAR POWER STATION -
UNIT 1 - AMENDMENT 88 - SUBMITTAL OF REVISION 12 TO THE FIRE PROTECTION EVALUATION PEPORT
Dear Mr. Denton:
The Cincinnati Gas & Electric Company on behalf of itself and as agent for Columbus and Southern Ohio Electric Company and The Dayton Power and Light Company hereby submits forty (40) copies of Revision 12 to the Fire Protection Evaluation Report for the Wm. H. Zimmer Nuclear Power Station -
Unit 1 (ZPS-1) . This revision is in the form of a supplemental report to the Fire Protection Evaluation Report. It is entitled " Fire Protective Cable Tray Fire Tests, September, 1978 Through January, 1979 for Wm. H. Zimmer Nuclear Station", (Engineering Report No. 78-9-FP-1). It should be filed with the Fire Protection Evaluation Report as it pertains to Questions 7 and 12.
Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY By E. A. BORGMANN Vice President - Engineering Services and Electric Production EAB: dew Enclosure cc: Charles Bechhoefer State of Ohio )
Glenn O. Bright County of Hamilton)ss Frank F. Hooper Troy B. Conner, Jr. Swoyn to and subscribed before me James P. Fenstermaker this aLN day of February, 1979.
Peter H. Forster William J. Moran J. Robert Newlin William G. Porter, Jr. bM d; James D. Flynn Notary Public Thomas A. Luebbers . _ , _ . _ , ,
Stephen Schumacher ; ,
John D. Woliver ,, , g _
ug
Introduction The following report was prepared by Husky Products Inc., and is based upon documentation of testing during September, October, November, 1978 and January, 1979, at the Husky test facility in Florence, Kentucky.
The ampacity loading tests were run imder the direction of R. E. Cotta of Sargent & Lundy, and R. J. Reiman of CG&E. The fire protection design was a joint venture with C. E. Chaille, Senior Project Engineer, Development Laboratory, The Babcock and Wilcox Company, F. Horne of R. E. Kramig
~
Company, Insulating Contractor, R. E. Cotta, Electrical Project Engineer, Sargent & Lundy and R. J. Reiman, Senior Power Plant Engineer, CG&E. The fire tests run at Husky on 11/9/78 and 11/10/78 were witnessed by C. E. Chaille, R. E. Cotta, R. J.
Reiman, T. Wall of Husky, and C. F. Baldassarra, Schirmer Engineering Corporation, Senior Engineer, Fire Protection Department. Schirmer Engineering Corporation were fire protection consultants on the Zimmer N.P.S. Project.
The report is a demonstration of the qualification of insulating barrier to maintain circuit integrity during a postulated " area" or " exposure" fire.
The tests were conducted on a system basis. Heat-Rise tests (ampacity loading), to measure the increase of internal temperatures due to cocooning the system with an insulating barrier, were conducted on fully loaded cable bus systems. A fully loaded cable tray system was simulated to determine the Heat-Rise (ampacity loading) under normal operating conditions.
In addition to Heat-Rise tests, Exposure Fire tests were conducted on both the cable tray and cable bus system. The exposure fire was simulated by an 8 ft.2 propane burner consist-ing of a 4-pronged fork shaped burner, located directly under the test specimen. The range of temperature of the exposure fire at contact with the test specimen was 1600 to 18000F at a calculated range of 1,200,000 to 1,430,000 BTU /HR average, based upon weight of propane used in each test.
The insulating barrier which was qualified in this testing series was a ceramic fiber material of eight pounds per cubic foot density, manufactured by The Babcock and Wilcox Company with the trademark of "KAOWOOL". This material was examined because it has been previously accepted on Hatch Nuclear Power Station, Unit 2, for thermal barrier use with cable trays and conduits, and because the material has been tested and qualified to the ASTM E-119 fire test temperature curve for that application at Hatch in July and August 1978.
This was documented in a U.L. Laboratory Test Report #R8758 dated September 6, 1978.
Tests 78-2 and 78-4, where cable bus and cable tray were turned on side with cover banded to sides, represent conditions much more adverse than expected field exposure for vertical installation. Cable enclosures were subject to flame impingement directed toward the seal between insulated cover and sides of insulated enclosure. Field orientation in a vertical position would not present as severe an exposure.
The insulating barrier of Kaowool, application techniques and thickness described in detail in the body of this report, proved to be qualified as a fire / thermal barrier between the enclosed system and external area or exposure fires, for all system arrangements used during the testing program.
S ubj ect:
Cable tray and cable bus equipment as used at Wm. H.
Zimmer Nuclear Power Station, cocooned with an insulating barrier, tested in an exposure fire in Horizontal and Vertical orientation.
Objective:
To qualify the cocooned cable bus and cable tray systems for use at the Wm. H. Zimmer Nuclear Power Station under the following orientation / exposure time conditions:
A. Horizontally oriented cable bus for one hour exposure to fire. (Simulata - Fork Lift Truck Route.)
B. Vertically oriented cable bus for one and one half hour exposure to fire. (Simulate -
Switchgear Room.)
C. Horizontal and vertically oriented cable tray for one and one half hour exposure to fire.
(Simulate - Switchgear Room, Auxiliary Building and Reactor Building applications for specific areas.)
Definition:
A " cocooned" cable bus or cable tray system is defined as an installed cable tray or cable bus system which has been field modified by the addition of a specific type and quantity of insulating ceramic fiber per a specific field fabrication procedure. (Material specification and field fabrication procedures are contained in the Material section of this report.)
==
Conclusions:==
From the results of the tests, the following conclusions were reached:
Cocooned Cable Bus and Tray Systems, in both horizontal and vertical orientation during exposure fire testing, retained complete circuit integrity for duration of exposure.
Also, no evidence of physical damage to the cable insulation was noted. Megger insulation reading at end of test proved the good condition of the cable. Temperatures measured at end of test were verified by suppliers as those which cause litt.'.e or no damage to cable.
Summary Detailed Conclusion in Addition to Integrity Verification The ampacity loading tests demonstrated that the horizontal design of the cable bus must include a one inch air gap between cover and sides to obtain:
A. Margin of conductor operating temperature for 90 degrees centigrade rating for continuous operation.
B. Margin of cable insulation temperature at end of 90 minute fire test to " integrity" rating of 200 degrees centigrade *, end of test temperature.
C. Margin of cable insulation temperature of combination of "A" and "B" above to " integrity" rating of 200 degrees centigrade *, end of test temperature.
The application of the Kaowool insulated cover to either cable bus or cable tray, to obtain a cocooned design must adhere to the following:
A. All butt joint on outer most blanket muct be pinned or banded on both sides of joint within 3 inches of joint, pins must be on 14 inch centers around tray.
B. Other pinned insulation is to be on 14 inch or less centers along length of blanket on tray.
C. Cover is to be securely banded to assembly to effectively seal the cover to the assembly. Spacing of 14 inches or less.
D. Insulation provided on cable tray and cable bus limited temperatures within cable enclosures to temperatures well below 2000C* , the " integrity" rating for EPR/Hypalon IEEE 383 grade cables used in the Wm. H. Zimmer Nuclear Power
'S ta tion .
- Rating verified by cable suppliers. See Appendix.
SUMMARY
-CONCLUSIONS
SUMMARY
OF TEST RESULTS TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION N Cable bus oriented horizontally above costs sus an eight square foot exposure fire of e' i 1600-18000F, impingement temperature N i PROPAWe k evRWER 78-1 Cable Bus Horizontal Sides and bottom insulated with two-1 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> requirement inch thick 8 lb density Kaowool blankets qualified with 1 1/2 wrapped longitudinally, Cover hour exposure test.
with one-1 inch thick 8 lb density Kaowool blanket installed with 1 inch air space along sides.
One inch air gap provided a " controlled" ventilation for both fire exposure and rmoval of heat generated by capacity loading.
Conclusion:
For conditions of test, a 1600-1800 F exposure fire of 1 1/2 hour duration did not adversely affect the internal operating temperatures of the cocooned cable bus system. As a result, circuit integrity was maintained and no failures were observed. Cocooned barrier design for cable bus. was qualified for a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> exposure based on a 1 1/2 hour test.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Cable bus oriented horizontally, turned y on side to represent a direct vertical exposure of the insulating material joint C4Bl6 BUS to an eight square foot exposure fire of 1600-18000F impingement temperature.
LBURWER 78-2 Cable Bus vertical Sides, top, and bottom insulated with two- 1 1/2 hour require-(turned on side) 1 inch thick 8 lb density blankets of ment qualified with Kaowool wrapped longitudinally. Cover 1 1/2 hour exposure insulation was independent of bottom and fire test.
sides to permit removal of cover without permanent damage to cocooned system.
Conclusions:
For conditions of test, a 1600-18000 F exposure fire of 1 1/2 hour duration impinging directly on the insulation joint between the sides and top of a horizontal cable bus oriented on its side to represent a vertical system, did not adversely affect the internal operating temperature of the cocooned cable bus system. Circuit integrity was maintained throughout the testing period with no failure detected; therefore, the design is qualified as a barrier for vertical cable bus for 1 1/2 hours.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Cable tray oriented horizontally above
(([]g__g'_ ..u, u q an eight square foot exposure fire of 1600-1800 0F, impingement temperature.
~
~k__ J L ousveg 78-3 Cable tray Bottom and sides insulated with 3-one 1 1/2 hour requirement horizontal inch thick 8 lb density Kaowool blankets qualified with 1 3/4 wrapped longitudally. Top consisted of hour exposure test.
1-one inch thick 8 lb density Kaowool blanket layed inside the cable tray assembly directly on top of the top layer of cables.
Conclusion:
For conditions of test, a 1600-1800 0 F exposure fire of 1 3/4 hour duration did not adversely affect the internal operation temperatures of the cocooned cable tray system. Circuit integrity was maintained without failure; therefore, this design was qualified for use as a barrier for 1 1/2 hours for horizontal cable tray.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Cable tray oriented horizontally, turned on side to represent a direct vertical ,
exposure of the insulating material Joint cMx[TAAf 2 ,_
- to an eight square foot exposure fire of s -c== 1600-1800 F, impingement temperature.
L 60A#f&
78-4 Cable tray vertical Sides, top and bottom insulated with 3 1 1/2 hour require-(turned on side) inch thick 8 lb density blankets of ment qualified with Kaowool wrapped longitudinally. Cover 1 3/4 hour exposure insulation was independent of bottom and fire test.
sides to permit removal of cover without permanent damage to cocooned system.
o Conclusio::: For conditions of test, a 1600-1800 F exposure fire of 1 3/4 hour duration did not adversely affect the internal operating temperatures of the cocooned cable tray system. Circuit integrity was maintained without failure; therefore, this design was qualified for use as a barrier for 1 1/2 hour for vertically oriented cable tray.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Cable bus oriented horizontally, subjected to low voltage high amperage testing to determine 8 internal operating temperature when
- e nO nc c55' cocooned. One inch air gap provided a " controlled" ventilation for both to sovacc fire exposure and removal of heat POWER SUPPL 7 generated by ampacity loading.
78-5 Cable bus horizontal System design same as description Test conducted until listed for test 78-1. temperatures reached steady state.
Conclusion:
Based on design load of 1458 amperes and test results at 1500 amperes and 1800 amperes of 28 and 380C rise respectively, cocooned diesel generator cable bus design qualified for operation as a controlled-ventilated system for use at Wm. H. Zimmer Nuclear Power Station.
Note: Design load of 1458 ampere represents 486 ampere per phase in three phases, or per circuit. Also, 1500 ampere is 500 ampere per phase, and 1800 ampere is 600 ampere per phase.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Tof Stol Cable bus oriented vertically, 7 subject to low voltage, high amperage testing to determine internal operating temperature when cocooned.
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74 sosacs f0 W ER $UffLf 78-6 Cable bus vertical System design same as description Test conducted listed for test 78-2. until temperature reached steady state.
Conclusion:
Based on design load of 1458 and test results at 1500 and 1800 ampere of 23.40 C and 34.50 C rise, cocooned diesel generator cable bus design qualified for operation as a non-ventilated system for use at Wm. II . Zimmer Nuclear Power Station.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Cable tray oriented horizontally, subject to simulated cable loading. IIcat input
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g , cy from 1637 ampere in cables inside enclosure
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- -- - - - - - /--m ,E P' ovwavt used to represent 12.6 watts /ft. loading.
' This is worst case for Zimmer Station cable tray loading for purpose of test.
Td Pavr4 S dh*Lf 78-7 Cable tray horizontal System design same as description Test conducted listed for test 78-3 until temperatures
' reached steady state.
Conclusion:
Insulated horizontally oriented cable tray subjected to simulated worst case 12.6 witts/ft operating condition of power cable by the use of heat input from 1637 ampere in cables inside enclosure.
This resulted in a 43 0C rise. Insulated horizontal cable tray system was qualified for operation for use at Wm. 11 . Zimmer Nuclear Power Station.
TEST NO. SYSTEM TYPE SYSTEM DESIGN DURATION Cable tray oriented vertically, 3f'- 7.,p subjected to heat input from vtA ,g rsc4' 1637 ampere in cables inside ASSEN8LY enclosure, to represent 12.6 watts /
ft. loading. This is " worst case" C40/E 748f for Wm. II . Zimmer Nuclear Power Station cable tray loading for purpose of test.
('
To SovRcc Poweg suffLf 78-8 Cable tray vertical System design same as description Test conducted until listed for test 78-4. temperatures reached steady state.
Conclusion:
Cocooned vertically oriented cable tray subjected to heat input from 1637 ampere in cables inside enclosure, to represent 12.6 watts /ft. loading. This results in a 410C rise when top of vertical assembly was sealed. Heat rise was lowered to 17.2oC when top seal was removed (ventilation permitted). Since 410C rise is acceptable, cocooned vertical tray system was qualified for operation as a non-ventilated system, for use at Wm. H. Zimmer Nuclear Power Station.
Note: Seal at top of vertical assembly represents a floor fire seal.
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Test Data Method of Fire Test and Test Equipment Method of fire tests for vertical cocooned assembly was to turn assembly on its side to prove the effectiveness of cover and especially of seal of cover to assembly. This is the " worst case" test i.e. fire at seal point with direct flame impingement.
Cables used in the test were EPR insulation, Hypalon jacket control cables for the tray tests, and 750 MCM power cable in the cable bus test. The power cable was same as for diesel engine < generator leads at Zimmer Station. All cables were certified IEEE 383 grade cables. Cable integrity before, during and after the test was proven by a 500 volt calibrated megger of lead to lead and lead to enclosure. Random lay was used for cable tray test.
The exposure fire was simulated by a fork shaped burner, fueled by propane gas, which produced test temperatures of 1600 to 1800 degrees Farenheit. The dimensions o.? the
" fork" were 2 feet wide, 4 feet long, with each fork member containing 45 holes, approximately 1/8 inches in diameter.
The rate of burned gas for the test was 1,209,096 Btu /hr.
to 1,381,842 Btu /hr. for 90 minute tests, and 1,357,149 to 1,431,175 Btu /hr. for 105 minute tests. Tests were run for longer than minimum time to obtain " margin".
Cable integrity was verified by a 500 volt megger test of:
A. Group of conductors to second group of conductors.
B. Conductors to assembly.
Megger readings of 500 megohms to infinity were obtained as
" pass" criteria. The megger had been calibrated to a standard.
Rate of Fuel Consumption Description of Time of Rate:
Test No. Fire Test # of Propane Test BTU /HR 78-1 Horizontal Cable 84 lb. 90 min. 1,209,096 Bus 78-2 Vertical Cable 96 lb. 90 min. 1,381,824 Bus 78-3 Horizontal Cable 110 lb. 105 min. 1,3'57,149 Tray 78-4 Vertical Cable 116 lb. 105 min. 1,431,175 Tray
Test No. 78-1 Test Data Cable Bus Horizontal Fire Test O
Date of Test Duration of Test Time Temperature C Remarks 11-9-78 90 min to qualify (90 min) Cable Fire Room (6able 60 min. TC No. #5 #2 #14 temp.
Begin: 3 925 267 below End: 123 980 290 }200c c Condition: Cable bus oriented horizontally, above an eight foog square exposure fire of 1600-18000F (925-980 C) of 1 1/2 hour duration.
Insulation: Cable bus insulated with 2 inches of Kaowool on sides, bottom, ends with 1 inch air gap provided between sides and top Kaowool cover.
Conclusion:
Cable temperature at end of 90 minute test of 123CC is well below 200 C " integrity" rating obtained from cable suppliers. Cables meggered 500 megehms to infinity at beginning and end of test. Integrity was verified throughout.
No evidence of physical damage to the cable insulation was noted. Megger insulation reading at end of test proved th ; good condition of the cable. Temperatures measured at end of test were verified by suppliers as those which cause little or no damage to cable.
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Test #78-1 Date of Test 11-9-78 Thermocouple Number Cable Bus Horizontal 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Fire Fire Fire Bottom Bottom Bottom - Cable Teltp. - - Cable Temp. - Center Back Time Temp Temp Temp inside inside inside top of of Min. Remarks End Center End atendat( at end end'. center end top center top Room Room 1 Beginning 1265 1697 1662 38 38 37 40 '45 40 42 43 44 162 511 5 1300 1700 1683 47 55 52 50 58 48 59 62 60 236 538 10 1330 1760 1560 61 81 75 56 68 54 78 92 83 267 501 15 1390 1790 1450 74 111 94 62 79 61 97 118 103 246 551 20 1479 1750 1580 92 152 120 69 91 68 117 144 120 241 577 25 1430 1761 1614 111 182 136 75 10% 75 127 164 131 251 516 30 1300 1748 1582 124 198 147 80 112 81 132 175 138 252 522 35 1420 1790 1625 133 210 155 86 ,123 87 137 185 142 249 529 40 1411 1780 1608 140 219 157 90 131 92 139 192 146 245 520 45 1375 1755 1615 145 225 165 95 139 98 140 195 151 255 555 50 1230 1707 1565 148 230 170 100 145 104 145 203 157 266 481 55 1450 1730 1600 153 237 169 104- 153 108 149 206 160 251 544 60 Gualification Point 1413 1720 1560 153 233 171 108 159 113 149 210 163 258 510 65 l 'J e 1790 1605 156 241 175 113 165 118 153 213 165 259 548 70 146r 165 1615 165 242 178 117 169 122 155 218 169 250 546 75 1. '745 1574 158 247 177 118 173 124 156 220 170 243 520 80 *
.738 1564 160 251 179 122 l e 178 128 160 222 172 256 549 85 I 1329 1787 1605 164 252 183 126 184 134 165 227 176 253 537 90 Margin Point 1480 1795 1630 164 253 185 130 187 136 165 230 178 262 553
Test No. 78- 2 Test Data Cable Bus Vertical Fire Test U
Date of Test Duration of Test Time Temperature C Remarks 11-9-78 90 min. (90 min) Cable Fire Room TC No. #8 #2 #11 {[temp.
Cable Begin: 59* 561 83 below End: 153 953 271 2000C
- Still warm from morning test (7 8-1)
Condition: Cable bus oriented horizontally, turned on side to represent a direct vertical exposure of insulating material joint to an eight foot square exposure fire of 1600-18000F (561-9530C) impingement temperature.
Insulation: Cable bus insulated with 2 inches of Kaowool on sides, bottom and top, with cover banded to sides, one end of cable bus was sealed.
==
Conclusion:==
Cable temperature at~end of 90 minute test of 153 C is well below 200 C " integrity" rating obtained from cable suppliers. Cables meggered 500 megohms to infinity at beginning and end of test. Integrity was verified throughout.
Test 78-2 where cable bus was turned on side with cover banded to sides, represents conditions much more adverse than expected field exposure for vertical installation. Cable enclosures were subject to flame impingement directed toward the seal between insulated cover and sides of insulated inclosure. Field orientation in a vertical position would not present as severe an exposure.
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Test #78-3 Date of Test 11-10-78 Thermocouple Number Cable Tray llorizontal 1 2 3 4 5 6 7 8 9 10 11 Cbl. Tray col. - Room Temp. -
- Fire Temp. -
~
- " ""E* ~
Time Temp. Terrp. Temp.
Min. Remarks End Center End Side Ctr. Side BTM CTR TOP Ctr. Back 1 Be91 nnin9 1725 1490 1665 53 52 52 51 51 51 311 165 5 1752 1592 1752 53 53 54 51 51 52 350 231 10 Laid blanket over 1793 1609 1718 54 63 53 51 53 56 336 251 one end 15 1753 1640 1766 56 79 55 53 56 61 375 270 20 1765 1643 1756 62 94 60 56 58 65 385 261 25 1750 1653 1795 67 115 69 60 62 70 396 293 30 1790 1617 1750 75 138 76 67 6C 76 413 285 35 1793 1636 1760 84 157 83 75 70 70 410 276 40 1800 1631 1751 97 176 97 82 74 85 374 272 45 1770 1663 1776 106 198 115 90 79 90 399 287 50 1801 1651 1775 118 221 142 102 88 100 429 306 55 1776 1669 1716 132 240 142 108 93 106 387 282 60 1790 1658 1780 145 257 175 223 106 121 451 323 65 1765 1674 1743 159 271 176 128 114 128 383 298 70 1786 1674 1750 172 285 209 146 127 139 449 312 75 1815 1659 1783 184 297 210 151 134 149 450 311 80 1770 1683 1812 195 306 223 160 142 156 478 328 85 1785 1679 1785 204 309 233 162 147 164 387 285 90 cualification Point 1768 1700 1752 214 320 249 171 155 177 422 310 95 1772 1691 1735 227 336 278 195 165 178 370 296 100 1802 1673 1750 242 352 289 210 175 179 372 265 105 Margin Point 1742 3679 1719l 255 362 295 221 183 183 392 ?RG
Test No. 78-4 Test Data cable Tray Vertical Fire Test O
Date of Test Duration of Test Time Temperature C Remarks 11-11-78 105 minutes to (90 min) Cable Fire Room qualify 90 minutes TC No.
Begin:
- 5 #2 31* 683 271
- 10 l[ temp.
Cable 0 End: 157 883 491 <
lbelow 200 C L
- Still warm from morning test (78-3)
Condition: Cable tray oriented horizontally, turned on side to represent a direct vertical exposure of the insulating material joint to an eight foot square exposure fire of 1600-18000 F (683-883 C), impinge-ment temperature of 1 1/2 hours duration.
Insulation: Sides, top, and bottom insulated with 3-one inch 8 lb density Kaowool blanket wrapped longitudinally.
Cover of 3-1 inch Kaowool insulation banded to sides, one end of cable tray was sealed.
==
Conclusion:==
Cable temperature at end of 90 minute test of 157 C is well below 2000C " integrity" rating obtained from suppliers. Cables meggered 500 megohms to infinity throughout test. Integrity was verified.
Test 78-4, where cable tray was turned on side with cover banded to sides, represents conditions much more adverse than expected field exposure for vertical installation. Cable enclosures were subject to flame impingement directed toward the seal between insulated cover and sides of insulated inclosure. Field orientation in a vertical position would not present as severe an exposure.
i RRE TEST 78-4 CRBLE TRRY TURNED ON SIDE 1
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~ & CABLE TEMP RT M CORNER %
(SCRLE TO LEFT) ~//00
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U %2*F '700 it AdeM ' TEMP.
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BTU BVRA//MG RATE -yg9
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LOCAT/dM Of EC.'S too TuwED TEST # 78-+:
ON SIDE 399 VERT / cal. CABLE TRAY IVM.H. 2/MMER N RS, UI V"
^
r .llS y? y8 FIRE TEST W/TH 3-/NCH -440 roo wosi. sL a xE r ou 00VEV$$$ n V t 5,4 3S/MS f 3-/NCH _3,g 9 RTSEA/ a3 a2 a/ KROWOOL COVER auwER 'I SVKNER -200 THEKW/OCOOPLES E,4,E,8,9{-/0 a *// CENTER OF N00M jj .jo - 7g E /0 15 EO N A0 $ 4b 1N 6b 55 $0 Of 70 75 30 $* l0 T/ME /N M/MUTV.LG
Test #78-4 Date of Test 11-10-78 Thermocouple Number Cable Tray Turned on Side 1 2 3 4 5 6 7 8 9 10 11 Time Fire Tennp. - -Cable Temp.- -Cable Temp.- Temp. -Room Terrp.-
Min. Remarks End Ctt. End Side Ctr. S4_de End Ctr. Seal Back Ctr.
1 Beginning 1450 1261 1644 87 87 81 74 77 79 520 184 5 1460 1393 1588 87 88 81 75 81 105 553 231 10 1560 1448 1582 86 93 81 76 88 185 602 272 15 1459 1437 568 86 99 82 78 96 344 685 287 20 Thermocouple 3 disabled 1500 1449 89 108 85 82 105 499 790 288 at 16 minutes.
25 1540 1468 91 120 89 87 117 630 154 300 30 1460 95 134 94 93 124 754 651 322 35 Turned off at 33 min. 1555 1639 1473 111 173 113 107 137 798 698 301 to replace TC's 2 & 3
- 40 started clock over at 1669 1648 1476 120 188 123 115 149 792 724 320 33 min. when resumed 45 1659 1633 1448 130 202 133 124 160 820 745 390 50 1678 1660 1463 138 215 144 132 170 852 742 351 55 1692 1656 1479 148 229 155 141 180 879 762 3s1 60 1600 1669 1380 160 243 167 150 187 903 755 342 65 1665 1649 1300 170 257 180 159 194 920 709 342 70 1712 1649 1521 183 271 194 169 206 935 780 376 75 1650 1610 1500 195 284 207 179 214 945 790 430 80 1680 1610 1508 208 295 220 190 227 953 838 499 85 1717 1631 1511 219 306 233 199 236 960 849 474 90 Qualification Point 1700 1621 1510 232 316 246 209 246 965 862 528 95 1702 1600 1520 242 325 258 219 255 970 850 521 100 1715 1635 1515 253 334 270 230 266 975 885 556 105 Margin Point 1640 1640 1518 263 342 280 239 275 978 867 471
Test No. 78-5 Test Data Cable Bus Horizontal Ampacity Load Tests Ampere Degrees C Date of Test Load Ambient Rise Total Remarks 10-3-78 1500 18 51 69 -
Part 1 1800 18 75 93 Total exceeded 90 C Conditions: Cable bus oriented horizontally, subject to 1500 and 1800 ampere short-circuit testing to determine internal operating temperature.
Test conducted until temperature reached steady state.
Insulation: Cable bus insulated with 2 inches of Kaowool on sides, bottom, top and ends.
Conslusion: Complete seal does not give margin for continuous conductor temperature rating of 90 C.
10-11-78 1500 16 28 44 Part 2 1800 17 38 55 Total below 900 C Conditions: Same as 78-5 Part 1 Insulation: Cable bus insulated with 2 inches of Kaowool on sides, bottom, ends, but 1 inch air gap provided between sides and top Kaowcol cover.
Conc'usion: Margin obtained for continuous conductor temperature rating of 90 0C. Horizontal cable bus design must include 1 inch air gap between cover and sides of insulated assembly for ampacity reasons.
Note: 1500 ampere represents 500 ampere per phase in 3 phases while 1800 ampere represents 600 ampere per phase in 3 phases. Design load is 486 ampere per circuit or 3 times 486 ampere (1458 ampere) fcr three phases.
Nominal values of 500 (1500 for 3 phases) and 600 (1800 for 3 phases) were used in test.
Test No. 78-6 Test Data Cable Bus Vertical Ampacity Load Test Ampere Degrees C Date of Test Load Ambient Rise "otal t Remarks 10-12-78 1800 16 18 34 Total below 90 C Part 1 Conditions: Cable bus oriented vertically, subject to 1800 ampere short-circuit testing to determine internal operating temperature. Test con-ducted until temperature reached steady state.
Insulation: Cable bus insulated with 2 inches of Kaowool on sides, bottom, top, and bottom end. Top end left unsealed.
==
Conclusion:==
Margin obtained for continuous conductor temperature of 90 0C.
1-30-79 1500 14.4 23.4 37.8 Total below 90 C 1-29-79 1800 16.7 34.5 51.2 Total below 90 C Part 2 Conditions: Cable bus oriented vertically, subject to 1500 1800 ampere short circuit testing to determine internal operating temperature. Test conducted until temperature reached steady state.
Insulation: Same as 78-6, Part 1, except top end of assembly was sealed.
==
Conclusion:==
Margin 0
obtained for continuous conductor temperature of 90 C, since 23.4 C rise is acceptable, the com-plete cocooning is preferred because of greater fire protection.
Test No. 78-7 Test Data Cable Tray Horizontal Ampacity Load Test Degrees C Date of Test Watts /ft Load Ambient Rise Total Remarks 1-12-79 to 12.6 watts /ft. 5 43 48 Total below 1-15-79 by simulation 90 C Part 1 Condition: Cable tray oriented horizontally, subject to simulated worst case 12.5 watts /ft. operating condition of power cable by use of cables which circulated 1637 ampere inside enclosure. Test conducted until temperature reached steady state.
Insulation: Bottom and sides insulated with 3-one inch thick 8 lb density Kaowool blanket on sides and bottom.
Top insulated with single layer of Kaowool layed inside cable tray assembly directly on top of cables,
Conclusion:
Margin obtained for continuous conductor temperature rating of 90 0C.
12.6 watts /ft. 12.2 44.6 56.8 Total below 1-15-79 by simulation 90 C Part 2 Conditions: Same as 78-7, Part 1.
Insulation: Bottom and sides insulated with 3-one inch thick 8 lb. density Kaowool blanket on sides and bottom.
Top insulated with three layers of Kaowool on Cover which was banded to sides. Both ends were sealed.
Conclusion:
Margin obtained for continuous conductor tempera-ture rating of 90 0C.
Test No. 78-8 Test Data Cable Tray vertical Ampacity Load Test Degrees C Date of Test Watts /ft Load Ambient Rise Total Remarks 1-19-79 to 12.6 watts /ft 15 17.2 32.2 Below 90 C 1-22-79 by cimulation Part 1 Conditions: Cable tray oriented vertically, subject to simulated worst case 12.6 watts /ft operating condition of power cable by use of cables which circulated 1637 ampere inside enclosure. Test conducted until temperatures reached steady state.
Insulation: Bottom, sides, top, and bottom end insulated with 3-one inch Kaowool blankets.
==
Conclusion:==
Margin obtained for continuous conductor temperature rating of 90 C.
12.6 watts /ft 18.3 41 59.3 Below 90 C 1-19-79 by simulation Part 2 Conditions: Same as 78-8, Part 1 Insulation: Bottom, sides, top, and both ends insulated with 3-one inch Kaowool blankets.
==
Conclusion:==
Margin obtained for continuous conductor tempera-ture rating of 90 C. Since 41 C rise is acceptable, the complete cocooning is preferred because of greater fire protection.
a) Tests 78-1 & 78-5-Part 2 b) Tests 78-2 & 78-6-Part 2 Test Data Cable Bus, Combining Fire Test Temperatures with Ampacity Rise Temperature Temperature Date of Test Duration in OC Remarks TC#5 a )78-1: 11-9-78 90 min. End: 123 Fire test total temp.
78-5: 10-3-78 until steady End: 28 (Risetempfrom1500 (Part 2) L ampere load test Combined temp. 1510 C Combined temp below 200 0 C Conditions: Cable bus oriented horizontally as described in 78-1 fire test and 78-5 for ampacity load test.
Insulation: Cable bus insulated with 2 inches of Kaowool, and 1 inch air gap provided as described previously.
Conclusion:
1510C, combined end of 90 minute fire test temperature and ampacity rise is well below 2000 C
" integrity" temperature.
TC#8 b )78-2 : 11-9-78 90 min. 153 Fire test total temp.
78-6: 10-12-78 Until steady 23.4 (Risetempfrom1500 (Part 2) ( ampere loading Combined temp. 176.40 C Combined temp below 200 0 C Conditions: Cable bus oriented horizontally, turned on side as described in 78-2 fire test and 78-6 for ampacity load test.
Insulation: Cable bus insulated with 2 inches of Kaowool, on sides, bottom and one end, and 2 inch Kaowool cover banded to side.
Conclusion:
176.40C, combined end 90 minute fire test temperature and ampacity temp rise is well below 2000C " integrity" temp.
a) Tests 78-3 & 78-7-Part 1 b) Tests 78-4 & 78-8-Part 2 Test Data Cable Tray, Combining Fire Test Temperature with Ampacity Rise Temperature Temperature Date of Test Duration in OC Remarks TC#6 a) 78-3: 11-11-78 90 min. End: 121 Fire test total temp 78-7: until steady End: 43 [ Rise temp from 12.6 (Part 1) L watts per ft. test Combined temp. 164 C Combined temp below 2000C Conditions: Cable tray oriented horizontally as described in 78-3 fire test and 78-7 watts /sq. ft. load test.
Insulation: Cable tray insulated with 3-1 inch Kaowool blanket on sides and bottom, and 1-one inch blanket layed over top of cables in tray as described previously.
Conclusion:
1640C combined end of 90 minute fire test temperature and'ampacit?~~ rise i's~well bel ~ow 20000 " integrity"~ temperature.
TC#5 b) 78-4: 11-11-78 90 min. End: 157 0 C Fire test total temp.
78-8: Until steady End: 41 Rise temp. from 12.6 (Part 2) watts /ft test Combined Temperature 198 C Combgnedtempbelow 200 C Conditions: Cable tray oriented horizontally, turned on side, as described in test 78-4 fire test, and 78-8 (Part 2) watts /sq. ft. load test.
Insulation: Cable tray insulated with 3-1 inch Kaowool blanket on sides, bottom and one end, and 3-1 inch Kacwool cover banded to sides.
Conclusion:
1980C combined end of 90 minute fire test temperhuie an~d7mpacity rise temperature
~ ~
^ ~ ~ ~
is~~~
b~eloW ~ 200dD ~integritV ' temperature .
INSTALLATION MATERIAL SPECIFICATION Installation of Blanket Material and Covers The Kaowool blanket was secured to the cable bus and cable trays on sides, lip of assembly and bottom as follows:
Assembly Base for Kaowool Thickness Cable Bus Metal lath 2-1 inch layers Cable Tray Solid bottom steel tray 3-1 inch layers Blankets were secured by pinning. Pins were installed by welding.
The covers for the assemblies were as follows:
Assembly Position Description of Cover Cable Bus Horizontal 1-1 inch blanket pinned to matal cover, with 1 inch air gap between lip of assembly and cover Cable Bus Vertical 2-1 inch blanket pinned to metal cover, with cover banded to bus Cable tray Horizontal 1-1 inch blanket was layed on top of cables for protection Cable tray Vertical 3-1 inch blanket pinned to metal cover, with cover banded to tray.
The pins to secure the Kaowool blanket were welded to the base material by a machine capacitor-discharge stud welding method. Procedure details and welding specifications are detailed in the following pages.
FIREPROOFING ELECTRICAL CABLE BUS HORIZONTAL Bus duct to be fireproofed with 2 layers 1" thick 3 lb.
density Kaowool.
p.
Step 1. Visually inspect outer surface of bus duct for dirt, grease, etc. and remove if present. h"- V -~d Step 2. Using capacitor - discharge type welder, weld , 7 4" 12 ga. aluminum insul pins approximately 12" on center '
i along bus in locations shown.
l Step 3. Measure bottom and sides of bus and cut and bend a piece of high rib lath (approximately 29" x 1/2") to these dimensions with the ribs turned in toward the bus. 1._ ly"f s*y _
Lath to overlap top lip of bus for structural rigidity. I Step 4. Determine location of outer layer joints in Kaowool along bus, and attach 3" 12 ga. carbon steel insul pins, as shown to high rib lath with 2 K.125 (approximately 1 1/4" x 1 1/8") galvanized insul clips. Pins should be approximately 11" on center along bus but within 3" on
{.--
F each side of the outer layer joints. Make spacing of pins I i on each surface of lath different than the spacing of pins attached to bus.
Step 5. Impale boxed configurations of high rib lath _
over pins on bus duct, centering each on the bottom. - htd Secure lath to bus with K.125 aluminum insul clips and - " h-3(( u bend pins over. l,_l Step 6. Measure and cut Kaowool for outer layer to wrap around bottom and sides and over the top approximately to raw, _4_
the inner edge of the flange of the bus. Locate edges at i ggy p,' pp
" t outer layer joint locat1cns and impale Kaowool on pins, keeping joints as tight as possible and secure with K.125 l 7*l galvanized insul clips. Cut off excess pins on sides and bottom, leaving 1/4" and flatten slightly. Top pin at flange should be left approximately 3/4" long and flattened slightly immediately above insul clip.
Step 7. Measure spacing for pins on 12 inch steel cover g and weld 1 1/2 inch, 12 gauge carbon steel pins to cover I as shown. 7f ov:,L Step 8. Cut Kaowcol to width of 12 inch steel cover. .
Apply one layer to cover. If a butt joint is required, ',^ " -
this should be as tight as possible, with pins 3 inches 1 1/
from each edge installed. Secure layer of Kaowool with I i i K.125 galvanized insul clips, cut off excess pin to approximately 14 inches and flatten. /t j,
Step 9. Install insulated cover to tray with Husky 1 1 ,m
" raised cover" steel clip, to provide 2 inch clearance, "Mi m-
-4 1 inch air gap. i
FIREPROOFING ELECTRICAL CABLE BUS VERTICAL Steps 1, 2, 3. Same as horizontal.
Step 4 Add:
Add pin pointing inward near top of both sides l_
of lath, secure with 2 K.125 galvanized insul clips, and bend-so it is pointing out.
__d)!
__ a _ _ _
[S_-
y nw Steps 5, 6. Same as horizontal. f f Step 7. Measure and cut Kaowool for outer layer to wrap _u_
around bottom and sides and over the top approximately to p 7?
the inner edge of the flange of the bus. Locate edges at T outer layer joint locations and impale Kaowool on pins, 1[IT i -'*
keeping joints as tight as possible and secure with K.125 1 -
galvanized insul clips. Cut off excess cins on sides and ,
bottom, leaving 1/4" and flatten slightly. Top pin at F"--- X ----d flange should be left approximately 3/4" long and flattened slightly immediately above insul clip.
Step 8. Measure spacing for pins on insulated cover as in Step 4, and weld 3" 12 ga carbon steel pins to flange as shown.
KAcx=.' -
S tep 9. Measure maximum dimension (X) of outer layer of Kaowool on bus duct. Cut Kaowool to this width and apply M X d' two layers to 18 inch steel cover with joints staggered, ' #
l each layer secured with K.125 galvanized insul clips, all joints tight, and pins within 3" of both sides of outer + 3 1(E' 9 3 # ;a.
layer joints. Cut off excess pins to approximately 1/4" and flatten. j (e v' e.<
Step 10. Insulated cover should than be centered on top (# - ~ ~=-
of bus duct with Kacwool side down, and banded with 1/2" .tv, p*
.020 stainless steel bands 12" on center for securement. C ly . ~1 D/u i :.c.,
70 (tl G L F S &'S
FIREPROOFING ELECTRICAL CABLE TRAY HORIZONTAL Tray to be fireproofed with 3 layers 1" thick 8 lb. density Kaowool.
~
Step 1. Visually inspect outer surface of tray for dirt, grease, etc. and remove if present.
[ ]
Step 2. Lay out spacing of insul pins along tray to assure that pins will be within 3" of each side of Kaowool joints in the outer layer. Pins between outer layer joints should be approximately 11" on center.
Step 3. Grind away galvanizing at pin locations.
Step 4. Using capacitor - discharge welder, attach 4" _ i 12 ga. carbon steel insul pins in configuration shown at ZZQ i
spacings along tray determined in Step 2. . !
Step 5. Measure sides and bottom, cut piece of Kaowool t 1--
fit, and impale over pins with edges approximately 16" from _ I- h outer layer joint locations. Secure Kaowool with K.125 T F i galvanized insul clips.
Step 6. Apply several first layers. Then repeat for second layer, being certain to locate edges of Kaowool between first layer joints and outer layer joint locations.
Keep all joints tight. Secure with insul clips. Trim top edges of both layers even with flange of tray.
Step 7. Cut outer layer Kaowool long enough to wrap over _ hg._
top flange of tray, position with edges at outer layer joint-tt M t-locations, impale on pins and secure with insul clips. Cut I off excess pin to approximately 1/4", and flatten this ) j I portion slightly to help prevent insul clip from coming off.
Step 8. A layer of Kaowcol is layer over the installed cables to shield them from room heat, during a postulated exposure fire. g,9wfu 8mzor
_ gAl CJnx gi; e r -
. tp:
r r
FIREPROOFING ELECTRICAL CABLE TRAY VERTICAL Steps 1 thru 6. Same as horizontal.
Step 7. Add:
Leave pin on flange of tray approximately
- 3/4" long. ;_ i_ L-- _
w Step 8. Measure 18 inch wide cover to determine spacing of pins as in Step 2, grind away galvanizing and weld 4" 12 ga carbon steel pins to cover in configuration shown. !
Step 9. Measure maximum dimension (w) of outer layer of Kaowool on tray. Cut Kaowool to this width and apply 3 ( U"^.
layers to cover with joints staggered, each layer secured i l with K.125 galvanized insul clips, all joints tight, and --b- , ,
r_
pins within 4" on each side of outer layer joints. Cut ,
- r off pins 1/4" and flatten. H 4"4 ir.
CE,<. d 44'I--
Step 10. Insulated cover should be centered on tray with Kaowool toward inside and banded with 1/2" .020 stainless,--_, 3g steel bands, 12 inches on center. -
2 ! ,
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i I
f
WELDING INSULATION PINS TO ELECTRICAL CABLE TRAY OR ELECTRICAL BUS DUCT WELDER: H. A. Jones Company--LW-700 or PW-1000 or equal capacitor-discharge type welder.
INSULATION PINS: Steel--For use on galvanized cable tray.
H. A. Jones Company No. 012-0001-12 or equal mild steel, copper plated, 12 ga. 4" insul pins.
Aluminum--For use on aluminum bus duct.
H. A. Jones Company No. 012-0003-09 or equal annealed aluminum, 12 ga., 4" insul pins.
INSUL CLIPS: H. A. Jones Company No. 031-0602-13 or equal galvanized 1 1/4" x 1 1/8" speed washers.
PROCEDURE:
STEP 1. Set up welder in accordance with manufacturer's instruction manual.
S TEP 2. Clean dirt, grease, etc. from work surface if present.
STEP 3. Grind away galvanizing at pin locations if necessary.
STEP 4. Weld a pin at location desired, approximately perpendicular to surface. Grasp end of pin and bend it approximately 450 from perpendicular, then back in same plane to 450 from perpendicular on opposite side, then back again to its original position. If the weld withstands this test, both it and the machine setting are satisfactory and welding of additional pins may proceed, each being tested in the same manner.
~
STEP 5. If first pin does not withstand test, adjust voltage setting and weld another pin and test it.
Continue testing until several consecutive pins are securely welded.
STEP 6. Proceed to weld all pins required.
s Euhirmer SCHIRMER ENGINEERING CORPORATION 5940 WEST TOUHY AVENUE CHESTEP W. SCHtRMER, P E., PRESIDENT NILES. fluNOIS 60648 312/ 647-9390 RECEIVED ctxtaa tsaa. ctrt.
January 12, 1979 g g gg Mr. R. J. Reiman ---- -+
Cincinnati Gas and Electric Co. 2 P.O. Box 960 - -
Cincinnati, OH 45201 ,
f Re: William H. Zimmer -
Nuclear Power Station __ _ _ _ . -
Project No. 4130-00 ._ ____3 REllE 70
' RE an.
Dear Mr. Reiman:
The following are my comments related to the fire exposure tests conducted at Husky in Florence, Kentucky for the protection of selected cable bus and cable tray systems at the Zimmer station:
- 1. Enclosed is a graph showing the relationship between the ASTM E-119 standard time-temperature curve and a curve resulting from the data from one of the four fire tests conducted for the Zir=er cable systems.
On this graph, I have selected to demonstrate the data from test No.
78-3. In analy::ing the graph, it is apparent that the area below the curve resulting from fire exposure test No. 78-3 (up to 105 minutes duration) is slightly greater than that of the ASTM E-119 curve. There-fore, since the areas below the curve are nearly equal, the severity of the fire exposure on the cable system as a result of the Husky test arrangement is approximately equal to that of a fire exposure of similar duration from a test in accordance with ASTM E-119. Although the time-temperature curve was not followed in the Husky test series, the cable systems were subjected to fire severities equivalent to the ASTM E-119 test and, therefore, the test should be considered valid.
The curve from test No. 78-3 was selected as being typical of the entire test series. Test Nos. 78-1 and 78-2 resulted in slightly more severe fire exposures than the ASTM E-119 test. Test No. 78-4 was approximately equal in severity to the ASTM E-119 test.
M SG8-3 PRINTED IN U.$ A.
Mr. R. J. Reiman January 12, 1979
- 2. It should be noted that test Nos. 78-2 and 78-4 represent conditions much more adverse than expected field exposure due to the orientation in the test to simulate a vertical installation. Cable enclosures were subjected to direct flame impingement directed toward the joint of the insulation. The cable system in a horizontal position presents a greater challenge to attain fire integrity than field orientation in a vertical position where flame impingement and heat transmission through the insul-ation would be greatly reduced.
Very truly yours, SCHIRMER ENGINEERING CORPORATION Ca .
Supervising Engineer 8g cc: Mr. R. E. Cotta, Sargent & Lundy
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PREPARdD BY SCHIRMER ENGlHEERING CORPORATION FIRE PROTECTION CONSULTANTS I j"f,"hE 5940 W. TOUHY AVENUE NILES, ILLINOl$
8 60 CAeLE Fue 8tsisTAHet TEsm e WM. H. XIMN Et MPS- UHlr }
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- =
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RECE!'!ID mtm ;. n. un.
Babcock &Wilcox JE 3 '79 mm..
~
cwG I- ' P.O. Box 923, Augusta, Ga. 30903 I
- Telephone
- (404) 798-8000 1
' _g{7_j January 4, 1979
) ;
.t j
Mr. C. W. Beringhaus ytru m u ..__ J Cincinnati Gas S Electric Company WC M _ . i._ - -
P. O. Box 960 Cincinnati, Ohio 45201
Dear Mr. Beringhaus:
This letter is in regards to a conversation I had with Dick Reiman of Cincinnati Gas and Electric and Fred Banta of Husky Products on December 29, 1978.
This conversation concerned the difference in heat rise during fire tests in the morning and in the afternoon on cable trays protected with Kaowoo1@ blanket. The testsin the morning and afternoon were performed on the same cables, cable tray and Kaowool blanket wrap. The only differences between the two tests were changes in the orientation of the cable tray and the cover design. In most instances it was found that the heat rise in the afternoon test was more rapid than in the morning test.
The difference in the heat rise between these two tests is probably caused by heat storage in the test materials. In the morning test all the materials (cables, tray and Kaowool) were at ambient temperature. However between the morning and afternoon tests, the materials were allowed to cool for only 1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.
Although the surface of the Kaowool, cable tray and cables may have cooled to ambient temperature, the interior of these materials probably had heat stored within them and were warmer than ambient temperature. Therefore, in the afternoon test the heat flow through the Kaowool wrap plus the heat stored within the materials produced a more rapid temperature rise than in the morning test, where only the heat flow through the blanket wrap caused the temperature to rise. In the after-noon test even with the stored heat, the design passed the fire test with ease, providing a good margin of safety.
If there are any additional questions concerning our product or the test, I will be glad to answer them as best I can.
Yours truly, tko LG '2L J C. E. Chaille Project Engineer CEC /ps cc: B. G. Coleman A. V. Illyn J. E. O' Keefe File No. 2964-04 The Babcock & Wdcox Ccmpany / Estachsned 1867
- . :;.m w A
',BabchBkiWi g- .
+sv . r} Kaowool' Ceramic Fiber Product Catalog Typicas Blanket B&W Kaowool ceramic fiber is the basic fiber from which the Kaowool family has grown. The raw ma- ^ ;..
, :- S$
terial is kaolin, a naturally occurring, high purity, c- ^
alumina silica fireclay. Kaowool has a melting point of 3200F, a normal use limit of 2300F, but can be ', M..
y.
used at even higher temperatures in certain appli- i 6 gg G cations. B&W Kaowool has fiber lengths up.to 10 .
b ;
in., average lengths of 4 in. These long fibers, thor-k " l oughly interlaced in .the production process, pro-
, ,gf .h vide Kaowool blanket, bulk, and strip products with '-
f.j
' ; y:, ;', i .
unsurpassed strength without the addition of a '
, "M binder system. Other forms are processed from basic Kaowool ceramic fiber. Physical properties Color white B&W Kaowool blanket contains no organic binder or other Fiber diameter, microns (avg) . 2.8 organic constituents. Blanket will not contaminate furnace Fiber length, inches . _ . . . 4 (avg) to 10 atmospheres or emit offensive odors. Available in nominal Specific gravity (ASTM C 135) .. 2.5 6 densities of: 3,4, 6 and 8 lb/ cu ft. Width: 2 ft and 4ft. Specific heat. Btu /lb/F @ 1800F mean . . 0.255 g Length: 25 ft. Fiber tensi!e strength, psi . ... ... 1.65 x 105 High purity blanket is also available for reducing con- Fiber tensile modulus, psi 12.2 x 106 ditions or in applications where low percentages of iron Use limits, F oxide and titania are required in the fiber. Continuous 2300 Single application . 3000 Thickness Melting point, F . . . . . . . 3200 Hardness B&W Kaowool blankets are manufactured in the following MOH thicknesses for the indicated density:
....6 Knoop (100g load) . ... 700 3 lb 4 lb 6 lb 8 lb Kaowool ceramic fiber is a highly efficient insulator. Kao.
cuft cu ft cu ft cuft wool's low shot content gives more usable fiber for your in.
% in. -
.- .yes yes sulating dollar. Kaowool's longer fibers give it the high ten-
% in. yes. .yes yes. yes site strength and resiliency to withstand vibration and phys-1 in. yes . yes yes yes ical abuse. Kaowool is self supporting-will not separate, 1% in. .yes .yes yes. yes sag or settle. Kaowool has low thermal conductivity, low 2 in. .yes yes .- -
heat storage, and is extremely resistant to thermal snock.
Data are average results of tests conducted under standard procedures and are subsect to vanation. Results sitould not be used for specification purposes. 120-1 10174
___ _ _ ?. - - - - --
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Test #
78-1: 21,591 Btu X 84 lb. X 60 min. = 1,209,096.0 Btu lb. 90 min. 1 hr. hr.
78-2: 21,591 Btu X 96 lb. X 60 min. = 1,381,824.0 Btu
~
- 3. 90 min. 1 hr. hr.
78-3: 21,591 Btu X 110 lb. X 60 min. = 1,357,148.6 Btu TE. 105 nin. 1 hr. hr.
78-4: 21,591 Btu X 116 lb. X 60 min. = 1,431,174.9 Btu lb. 105 min. 1 hr. hr.
THE Post Office Box asi . , , . .
OKONITE Ramsey, New JE rd 07 2 201 -825-03OO/ C a3((M'Ckdrmte "
COMPANY J.": 4 79 January 2, 1979 ,
(1 rn(F~
Mr. C. W. Beringhaus Principal Electrical Engineer ,
Cincinnati Gas & Electric Company Post Office Box 960 --
Cincinnati, Ohio 45201 -
Dear Mr. Beringhaus:
U .
Members of your staff have asked me to supply information on our EP in-sulation(Okonite) and Hypalon jacket (Okolon) compounds which are in use on wire and cable installed at the Zimmer Nuclear Plant. The information requested involves the resistance of the two materials to elevated tem-peratures during fire testing. As I understand it, the surface temperature of the cable insulated with our Okonite/Okolon composite went from room temperature to a few degrees less than 200 C over the 90 minute period of the test. The 200 C peak temperature includes margin.
We have aged these constructions (1/C - Okonite/Okolon) at temperatures of 150 C for 3 weeks which is demonstrably more severe than 90 minutes at 2000C, and found the cable to be operable after the aged cable has been sub-jected to radiation and LOCA simulation.
In addition, we include thermogravimetric curves for both materials which were run at 20 C/ minute temperature rise which show no weight loss for the Okonite EP up to 200 C and only 2% up to 300 C. For the Okolon (Hypalon) compound there is no weight loss up to 180 C, and only 4% up to 250 C. The 4% loss is attributable to loss of a plasticizer which in no way detrimentally effects the flame retardancy of the material.
On the basis of this data and our LOCA work, we can state that there will be no detrimental effect on the Okonite/Okolon cables by subjecting them to the temperature rise of room temperature to 200 C over a 90 minute period followed by cool down.
Very truly yours, THE OKONITE COMPANY
,- i
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/., ,
'JS L / r ow J. F. Lasky, Vice President Enclo sur es Research and Engineering
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Suite 2005 122 South Michigan Avenue Chicago. tilinois 60603 (312) 939-2250 o Y ,e gh, the kerite company December 21, 1978 w RECEr!ID cen.u. r,a na E 27 '78 Cincinnati Gas and Electric Company CM i Mr. C. W. Beringhaus ,, P O Box 960 Cincinnati, Ohio 45201 , i Zimmer Nuclear Station Kerite Cables j l Ceramic Fiber Fire Protection g.;, ,3
, ; ,3)
Gentlemen:
-~
We are writing at the request of Mr. R. J. Rg man, to confirm that Kerite cables on this project should withstgnd the temperature excursion to the surface level of 200 C at the end of your 90 minute Ceramic Fiber Fire Protection Test without discernable change in overall life characteris tics . As you are aware, these cables are rated for continuous service at conductor temperatures of 90 C. Another rating applicable is that in an emergency condition - defined by durgtion of overload and frequency of overload - 130 C conductor temperature may be reached without consequences to the life of the cable. However, neither of these ratings are meaningful when analyzing the conditions imposed by your Fire Protection Test. In ghis test, the cable starting at room temperature (40 C) is subj ected to external heat transmitted through the blanket of ceramic fiber sufficient to raise its surface temperature to approximately 157 C, unenergized. Mr. Rfeman suggested the addition of another 30 degrees for energized load, and a factor of safety to a total of 200 C at the end of 90 minutes on a one time basis. 4 a subsidiary of HARVEY HUBBELL INCORPORATED HuGBELL
Cincinnati Gas and Electric Mr. C. W. Beringhaus Page Two December 21, 1978 Our conclusion is that this temperature condition would change the cable so minutely that it would be very difficult to measure and would have no effect on the life of the cables. Sincerely,
' f
/
Robert M. Bowman Regional Engineer RMB/r S&L - R.E. Cotta 24F25 S&L 55 E. Monroe Chicago, Illinois
ANACONDAh RECEIVED CDERAL ENca. an. January 8, 1979 I11 N d tve Mr. C. W. Beringhaus, Principle Electrical Engineer / "" i Cincinnati Gas S Electric Company ,_ _]_L ] P.O. Box 960 l Cincinnati, Ohio 45201 j l
Dear Mr. Beringhaus:
arTm re
- ~
According to my recent telephone conversation with Mr. R. J. Reiman, we would like to inform you that Anaconda cable utili::ing EPR insulation and Hypalon jacket wgli main-tain its integrity and continue its function at 200 C conductor temperature for 90 minutes. If you have any questions regarding th 3 susj e-t , please do not hesitate to telephone me at (317) 6s4-2321. Best regards, THE ANACONDA CCIPANY h' IRE S CABLE DI' ISION
- d. +i. C yM T. H. Ling Sr. Technical ( onsultant bjn cc: R. J. Reiman --
Cincinnati Gas S Elec. P. McCloy -- Anaconda / Cincinnati The Anaconca Comcary Wire and Cable Division East Stn street Manen. Inc'ans 46952 317/664-2311
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CORRESPONDENCE TO: N. L. Kaestle DATE: 10/11/78 FRCM: R. J. Eyer
SUBJECT:
INSTRUMDTr ACCUPACY DESCRIPTICN: 500 Volt Megger l'REACIURER: J.G.Biddle MCDEL* Hand crank SERIAL NO.: 690326 ELECTRIC CPE?ATING TEST EEFT. IDDTTIFICATICN NO.: T.D. 61.4 PAE ACCFACY: 1% of scele length This is to certify that: The acct:mcy of this instn: ment has been verified under the ccnditiens stated atcve with standards traceable to the thtional Bureau of Star.dands. Evidence of traceability is on file at cur Labcratcrf. TESTEDBYd - . ,
/ ' C' /
THE CINCINNATI GAS & ELECTRIC COMPANY The Union Light, Heat and Power Company
Biddle Megger Serial #690326 TD #61.4 Ohm Scale Value Resistor Read 100 ohms N/A 499.9 ohms N/A 997.3 ohms N/A 5050 ohms SK Megohm Scale S tandard 62.81 megohms 70 megohms 40.85 megohms 45 megohms 30.65 megohms 35 megohms 20.54. megohms 23 megohms 10.11 megohms 12 megohms
AMPACITY LOAD TEST Nameplate Data:
- 1. Powerstat: (Variac)
Type: ll56D-6Y; Spec: BP 142074 Input: 240V; Freq.: 60 HZ; PH: 3 Output: 0-280V; Amps: 100; KVA: 48.5
- 2. Trans former:
Ajax Transformer, dry type. Class: F; KVA: 15; Freq.: 60; PH: 1 j Prim: 277; VSEC: 5.0 Spec: 71-132; Ser: 022571 1150C
- 3. Tong ammeter calibrated to standard.}}