ML17334A559

Ampacity Test for Power Cables.

ML17334A559
Person / Time
Site:	Cook
Issue date:	12/16/1983
From:	Balanti, Litsky A, Mcallin J INDIANA MICHIGAN POWER CO.
To:
Shared Package
ML17334A555	List: ML17334A554 ML17334A556 ML17334A559
References
CL-542, NUDOCS 9711280225
Download: ML17334A559 (48)

Text

Page 1 of TEST REPORT American Electric Power Service Corp.

Canton Laboratory P.O. Box 487 Canton, Ohio 44701 Title es t o. CL-542 AMPACITY TEST FOR POWER CABLES December 16, 1983 Test By: L.J. Balanti;J. P. McCallin hfade For: AEPS Corp.

Report By: I. J. Balanti Sponsor:, W,',.~;F'-. Wilson - New York Approved By: AD P. Litsky Test Complet'e'd: November 18, 1983 INTRODUCTION For compliance with 10CFR50, Appendix R at the'. C.

Cook Nuclear Plant, tests were conducted on power and control cables enclosed in a TSI, Inc. one-hour fire barrier system.

The results of the test will be compared to computer-generated data to determine the validity of the computer model on heat run flow and cable ampacity.

OBJECTIVE The test objective was to simulate as closely as possible the actual conditions of tray and conduit runs proposed for Cook Plant and determine the final conductor temperature for the specified amperage and tray fill.

III. TEST METHOD The generalized test method consisted of:

l. Installing cables'.

Attaching thermocouples.

3. Enclosing the TSI fire barrier system.

4. Applying the specified amperages.

5. Maintaining a constant ambient temperature of 40oC.

6. Monitoring the temperature rise and final conductor temperature.

Copies To: T. O. Argenta/B. R. Larson - Canton B. J. Wa re Columbus C. B. Charlton Canton T. E. King Columbus S.- R. Kekane Columbus pS - Ceoee-oof A'ev o g~HAE~< Y 97ii280225 97ii24 /oF g9 PDR ADQCK 050003i5 PDR

'I. TEST METHOD (Cont'd.)

The detailed test procedure was as follows:

Equipment

.Cable Tray and Cover 1.1.1. Cable tray was galvanized steel, expanded metal. bottom; size 12" x 6" x 8'-0" Long.

1.1.2. Cable tray cover was galvanized steel, ventilated 12" wide.

1.1.3. 10'-0" Original tray length cut to 8'-0" to accommodate installation in environmental chamber.

1.1.4. Tray cover attached to tray by using ((10 x 3/8" Parker-Kalon type B (Z) with "H" head.

1.2. Conduit 1.2.1. 4" I.D. Galvanized rigid steel.

1.2.2. 1" I.D. Thinwall EHT 1.2.3. Conduits cut to 8'-0" to. conform with cable tray length and installation in chamber.

1.3 Pire Barrier Envelope 1.3.1. Thermo-Lag 330-1 subliming coating manufactured by TSI, Inc. for a one hour barrier. Thickness of barrier was .500" (+.125", -.000").

1.3.2. Prefabr.icated panels 6'-0" x 4.6".

1.3 '. Prefabricated conduit sections.

1.3.4. Steel banding.

1.4. Cables The following cables were used for testing:

B/M Item () Description 324 3TC 512 CU 600 V 339 3TC 86 Al 600 V 344 3TC N4 Al 600 V 348 3TC N2 Al 600 V 3101 3TC N4 Al 5 kV shielded 3102 3TC N2 Al 5 kV shielded 3103 3TC 02/0 Al 5 kV shielded 3104 3TC N4/0 Al 5 kV shielded 3120 Ps-c@8(e-o~l'v0 47J4aVN &fr cZ oP Q3

Test Setup 2.1 Raceway 2.1.1. Cable tray and conduit were supported approximately 2'-6" above floor to allow for natural ventilation.

2.1.2. Raceway ends were sealed during the test with thermal insulating material to prevent heat loss through these areas.

Note:

This procedure could cause excessive heating of the cables passing through the thermal seal; therefore, all temperature readings were taken a minimum of 1'-0" from the thermal seal.

2.2 TSI One Hour Fire Barrier System 2.2.1. The tray envelope was constructed of the pre-fabricated panels, cut so as to fit as shown in the Appendix (see Figure Il).

2.2.2. The conduits were encased in the prefabricated sections.

2.3 Thermocouples 2.3 ~ 1 ~ T-Type thermocouples were used to measure tempera-tures of the following:

A~ Ambient air B.. Top and bottom of the fire barrier envelope C. Air space in tray D. Conductors.

2. 3. 2. Thermocouples were installed on the inward side of the conductor in a triplex arrangement (see Figure 2). A hole was bored in the insulation and the thermocouples were placed on the conductor.

2.3.3. Thermocouples were imbedded in Omegatherm 201 high thermal conductivity paste.

2.3.4. Thermocouples were installed in a position located on the cables in the center of the tray where:

A. Heat generation is greatest.

B. Heat dissipation is the least (see Figure 3).

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2.3.5. The minimum number of thermocouples used to measure the conductor temperature was two (2) per cable circuit installed in the tray and five (5) for single cables installed in the conduit.

2.4. Cables 2.4.1. Cables were positioned in the cable tray in a single layer in such a position that there was a minimum spacing of 1/3 the diameter of the larger adjacent cable. Cables were then secured with "Ty-Raos".

Test Procedure 3.1 Each test consisted of installing the cables in the trav in one of six (6) configurations as specified in the test request.

3.2 Once the proper setup was attained, cables were subjected to a load of three phase, 60 Hz sinusoidal current as specified in Section 3 ~ 3 Ambient temperature was set to 400C.

3.4 ~ .emperature rise of the cables was recorded on an Esterline Angus llodel PD-2064 data acquisit-ion system at 4-hour intervals until the cable temper atu res st abi 1 i zed.

3.5. The voltage and amperage of each circuit was monitored periodically throughout the test.

Test Configurations 4.1 Test Nl Circuit No. Item No. Description Runs in Tray Ampacity 324 3TCNl2 Cu 3.8 324 3TCI12 CU 20.0 348 3TC()2 Al 60.0 324 3TCN12 Cu 0 pS CRQLF <o f

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4.2 Test <<2 Circuit No. Item No. Description RunS in Tray Ampacity 1 324 3TC<<12 Cu .17 2 324 3TC<<12 Cu .71 3 324 3TC<<12 Cu 2.8 4 348 3TC<<12 Cu 6.8 3120 4/C<<12 Cu 6.8 5 344 3TC<<4 53.0 4.3 Test <<3 Circuit No. Item No. Description Runs in Tray Ampacity 1 324 3TC<<12 CU 5 .71 2 324 3TC<<12 CU 5 2.8 3 3120 4/C<<12 Cu 1 6.8 3 324 3TC<<12 CU C 6.8 4 3120 4/C<<12 Cu 2 16.0 324 3TC<<12 Cu 2 16.0 4 339 3TC<<6 Al 1 16.0 5 339 3TC¹6 A1 1 36.0 5 344 3TC<<4 A1 1 36.0 6 344 3TC<<4 Al 1 53.0 7 348 3TC<<2 Al 2 60.0 8 324 3TC<<12 Cu 1 0 4.4 Test <<4 Cable Size: 3TC<<12 Cu 600 V.

Conduit Size: 1" I.D. EHI Ampacity: 2 amps.

4.5 Test <<5 Cable Size: 3TC<<2 Al 5 kV shielded with one end grounded.

Conduit Size: 4" I.D. Galv. rigid.

Ampacity: 72 amps.

4 ' Test <<6 Circuit No. Item No. Description Runs in Tray Ampacity 3101 3TC<<4 Al Sh. 20 3102 3TC<<2 A1 Sh: 25 3103 3TC<<2/0 Al Sh. 40 3104 3TC<<4/0 Al Sh. 50 r S- CqgLE-oo/

Hew o g~jyC+A/HwT P

IV. TEST RESULTS The complete temperature recordings are tabulated along with test comments on computer printouts and listed under data sheets in the Appendix.

The final conductor temperatures for each test are listed below:

Ampacity Runs in Highest Conductor Test No. Cable (Amps) Tray Temperature (o C) 3TCN12 CU 3.8 7 45. 6 n

20.0 3 59.7 3TCN2 Al 60.0 1 55.7 3TCN12 Cu .17 2 42.6

.71 2 42.7 2.8 45.1

'5 'Tc 6.8 1 44.4 4/CN12 Cu 6.8 1 43.9 3TC44 53.0 1 58.3 3TCC12 Cu .71 5 54.6 n

2.8 5 57.9 6.8 2 60.4 16.0 2 67.3 4/CI)12 Cu 6.8 1 55.2*

16.0 2" 62.7*

3TC((6 Al 16.0 1 57.6 II 36.0 1 65.9*

3TC()4 Al 36.0 1 57.9*

53.0 1 68.8 3TC()2 Al 60.0 2 63.7 3TCN12 Cu 0 l 42.9 3TCN2 Al 72.0 1 65.0 3TCN4 Al 20 2 45.6 3TC52 Al 25 1 45.4 3TC()2/0 Al 40 2 45.5 3TC((4/0 Al 50 1 44.5

• Thermocouple installed on insulation, not conductor.

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~ DISCUSSION Due to a limited supply of variable power sources, several circuits were consolidated. In all cases, the loads were met or exceeded those that were originally requested.

As per the original request, conductors were placed in the cable tray in a single layer in such a position that there was a minimum spacing of 1/3 the diameter of the larger adjacent cable. Although this probably is not the best simulation of actual conditions, it was one criterion of the test request. During Test 53, the amount of cables made it impossible to follow this criterion. It was followed as closely as possible and the results can be viewed in the Appendix under "Photographs".

All results contained in this report were forwarded to W. F. Wilson, New York, immediately upon completion of the test. Any questions pertaining to the actual test results as compared to the computer-generated data should be directed to him.

VI. APPENDIX A. Data sheets B. Test setup C. Photographs.

TEST No. 1

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7. } Cf.IANN=L Fi 7 ARE OM SB AMP CIRCUIT Mo CHANiNEL 5, - ARE ON '~8 AMP CIRCUI".

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TEST No.

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CQt'!I'IENTS TEST No. 2

'. H~R!'1 AMBIENT  !. Ci-ltd "'9)

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) VOLT START A . 471 B .478 C .558 8 B 6 v C Ere Fl

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'D 14 VQ . START A '. 587 ~ <I 7U C ~

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TEST Ho.

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'S. ) CURR EMD A $ .7 B B.B C 7.8 Ie! ~ VOLT END A . 534 Ei . 628 C . 6=7

~1. ) C}JRR =ND A 8.9 B 8.9 C 8.B VOLT END A . 117 !" . '. '" C . 115 e eer ~ ) CURR EMD A 55. E 8 5'. B C 55. 9

"4. ) VOLT EfilD A . 6'B E' 585 C . E97

'-ND OF TEST Wi~ CL-54" 11/11/BZ 1425 CI -542

TEST NO.

ESTERLI'NE ANGUS DA.A CHNS C'h CH4:" CH":-:4. C!-i"i C:-I=::B CH-"..7 CH-".." CH-".;9 CH"' CHhii Q C' 4C .-,r, C; '"4, '.'4, ".: "4,, 4 "4.. 8 '-i

".4es 5 8c C

.;1

~ % ~ o) i /l ~ ':"7. =. 4s8) 4 . C ~

5a 7 48. B 38. "9. 7  :-'9 BG: 4,5 ='9. 5 M) r ~ I 7 '.) 58s 9 45. (,5 V

'en

"?'. 7 a s7 r9 ~ ~ ~

~

87 1 c ~

n

'V ~ ~ 4'i=. 4 (I r' c7 C'rs C'rs'.

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4V n a-

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~ 7

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s 1

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59. 4 c. 5i. 8 58. 9 mls o

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5 5'r', G 8~ 4sJ 44. 45 55 B7. Bi G" ~

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~ ~ ~

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'6- }5 54. B F8. 5$ . 9 c'

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55 Gi. C'1 re c'c' c7 C'P

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5 5 ~ 57 4 c7 5B. 7 C aJV s 54. 5 55. 8 55e 7 C'4-542

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8< :45

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'T' g!= CH~ '9 85- A5 C J

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'5 4.5 48e

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48. 7

48. 7

48. 7

48. 7

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11:15 48. S 11-45 48. 9

41. 1 1 ".45

<< ~ 1 c' 41

~

48. 9 41 Ps- c68CE'-0o/

geV '0

~~~+m~~r g l0 cH g3 CL-542

TEST NO. 4

( I I CHNG CH,~ i CHN 'HNA CH55 CH-.. F CHN7 CH$ .'8 CH59 88: 88 ~hL

~')J ~ ~ ~

'r9. 4 Pg 8 A7 4' ~ I ) ,8 El ~ LI ~ 7%

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-r. 9 7)

I~

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'l 8: "8. F h9. 9 48. 5 48. A.B. AB. A 48 f 48. v~6. 5 fi:88

~

9.

':-'8.

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E v9 48. f AS. 6 48. 7 48. 5 4Q 48. ":

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4i. 5 48. A 41 48. 7 48. 5 48. 6 vS. " 48 AB. 7 Ai. 9 AB. 8 4f 48. i 48. 8 48. 5

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'.) qrgi v "TART A ';'9 5 8 f i9 4 C '='f, 8

.". ) Cl I RA START A:-'. 8 F'". 8 'C "='. 8 A. ) CHAN 9 ~PIVl-)( 'LD CL 5A':" TEST

.) CURR F'ihlLSH A::. 8 B ' 8 C ':". 8

TEST NO. 5

":STERL INE A!4GL'S DATA iaI t'!E CH!rr8 CHN1 CHN2 CH+t 'HN4 CH 6 CHI7 CHC9 CH.r1 8 CHNi 1 CH.-' '

87 c 4i ~

a>>

e

' v5. 6 27 7 8 \ ~ ~ 38 ~1. 7 e Pi8 ~ 1 J '8, V,Q all, 7 -.7 ~ 1 ~'5r 5 '<
>7. 4 ,4 ~ 5 88:Lc ~

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~ ~

lp( 2.3. l! .9. 6 ."8. 4 a9. 7 4-'. 9 47. 4 51. 1 46. 7 48. 1 c'8 46. 8

'+:

45 ..'4. 8 39. 7 ae i ~ 4'. 4 46e 58. 7 JJr n CC 58. 6 Ja ~

C'7i ~

18-'5 25. 8 48. 8 a'e

48. 8 4

'8.

J Ce ~ C'R C' 54 8 ~ 56. 9 5a e ~

18: 45 26e 8 48 41 41. 5 58. 4 C Jr 59. 9 C'C Ji Je 57 58. 7 55. 4

27. 8 l(,8 l. ~ V 4 8 JEa Ei. 9 i5. 4 Cn JG ~ r" 68. 4 56. 8 1 1 -45 '.8. F 4'. 5 4 ". 4 cap 7 c7 8 E.". 1 57. 4 59. '. 68. 9 57. 8 1 5 9r r (z8 41. 8 42. 5 aJ' ~

C'R 6>>e" 58 a 68, ie e ~

4c 29. 6 :9. 8 41. 7 41. 9 J a.r ~ a ca. 1 Ec. 8 58. 6 58. 5 62 58. 9 1::15 2q 8 41. 4 41. 7 CQ 64. 5 c'8 R 58. 9 52. 8 59. 4 1 ":45 38. >>Q 7 41 7 ~ 4':" 59. 5 64e>> 58. 9 58, 9 5R, 5

~ 1 i 4

'8.

9. 9 4i ~e 4a e c'"

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a 15:15 ~a@ 4'. E 41. 9 P',8 64 59. 52. 8 59. 7 1 c; ~ 4c >>1 ~ l,(7i 4~ ~

1 54. 5 58 65 5

'9e 61 5~ cJ9 9 CON."IENTS 1

) TEST 5 CL-54 " 18/ "8/Ba3 87>>8 r

~

". ) VOL> START n . 589 B . 844 . 611 CURR START A 72 8 B 7:.P C 7? 8 li.. ) CHNL 12 ON OUTSIDE INSULATION

5. ) '.-A1BIENT =-TOP CONDU T

6. ) -BOTTO!" CONDUIT 4-AIR SPACE

7. ) VOLT FINISH A . E~>>i B -997 C:657 B. ) C'JRR FINISH A 72. 8 B 7 ". 1 C 71. 9

9. ) END TEST 5 CL 542 18/ "8/8 " 154 5 pS- CIRCE- oo/

A'ev o

/6 oF 23 CL-542

TEST NO. 6 CQ>>)NEWT)S CL-54"'EST E ':"MD )"(UM yj /<Ei 85@5 CHAiNM)E) "'9 AHBA Eb!T i:-!ANGEL i RAY TG~

4 5

~,

~

~

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.)

C-.AA'w( '.. R B.-'ACE 7 )~  :.'5 AYiP. Cpii CHA)Y.ME' Si ~i8 n ) 48 Al"iP Cr<T CHAMM=LS 5i 7

g. ) 58 O'IP CIST Cl-iAAidELB iF~ ='Q~

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11. ) V)i~)'i ART A . 74~~ E" . 7E~J C . 7BB i,', ) CJRP. B;ART A ".5. -", B:-5." C

>=I. )

14.

'5 ~

) CUR< Si AR) A 48.

VOL; Si AR! A ."""F E) 8 i'. 6

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C 48.

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VO'l T EMD A . ':":"7 B. -'r-' C.

Ps CH/8 C 8-0o/

+~K 0 ff7/4QNBf7 l7 ~s B3 CL-542

TEST Ho. 6

'. >> ~ CH5'!:K:. CH54 CHii C/('Y CH. :B CH=;:9 CH";-.28 CH4:2 " CHN26 CHÃ'-"8 Sc ~

2 c- '.

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SB:1 AS. 7 AS. A B. 1 Me 9a 39. 7 39. A 39. 4 8~ AC ~

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Envelope Bottom

@L'or

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= affricated

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I Steel Banding

,Detail A Minimum 45 Ancle

'Anal'icat'ion o f Tho~

4 tie wire support during

=allation)

Corner Calkz.ng pz- cedar-oc /

(See Detail A) ReV' FIGuR:". 1 gg'~ R3

C'O/JDUc 7 OR Lo c8 ltO/u ol=

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~f Rev' gvWF<< V gE oF- B3

227200-STG-5400-02 REV. 1 PAGE 13 OF 13 DONALD C. COOK NUCLEAR PLANT Foiicti'.4h'i)~!-Are'a VERIFICATION CHECKLIST - CALCULATIONS Calculation Number Rev.

Signa ure of Verifi Date 1.0 Mere the inputsg'ifi4~a; SS'oui.':cia correctly sel ected, incorporated and documented into the calculation7 Yes P N/A Basis:

8 S

/$ 0 70 Cd A7 g+ '

g C~ C C/ 4770M Du/~LJJ'S'.0 Are assumptions necessary to perform the calculation ady~uately described and reasonable' Yes v N/A Basis: &$

~ c~e/c H/wzl c..+g/es'.0 Are the applicable codes, standards and regulatory requirements identified and requirements for design.

Basis:

met7 Ae Casse B&aC

. Yes ~ N/A 4.0 Mas an appropriate design method Yes W N/A uJ used'asis:

S gcc~pds'j'p r<Pbsr+~p 5.0 Is the output reasonable compared to inputT Yes ~ N/A Basis:

C i7 7+S VPA'rFic47i o

6.0 Basis

Are the s

results numerically corrects

/(

Yes ~ N/A C /UM.

/~perp'Md ~

Crg C- P5-cAI9CB-city/

/,p f,'ed'es.

VZreiF. Sb q Attachment 5

~ ~

0 0

Calculation PS-CABLE-001, Rev. 0 Verification Cont.

In addition to the verification checklist (Page 1), the following additional information documents the verification effort for calculation PS-CABLE-001, Revision 0.

For the identified cable trays at Cook Plant, it was necessary to predict correction factors for fills greater than those described in IPCEA-P-46-426 (up to 6 horizontal cables) so the appropriate conservative correction factor could be applied to the actual fillconfiguration.

A mathematical model was developed which represents the correction factors identified in IPCEA-P-46-426. MATHCADwas used to calibrate this model with the results being equal to the correction factors in the IPCEA standard and to calculate the correction factors for fillquantities greater than the IPCEA standard maximum value of 6.

Per the calculation procedure 227200-STG-5400-02, ifa computer program is used the requirements of 800000-LTG-7100-02 shall be met. Per review of section 2.2 of 800000-LTG-7100-02, software not identified for production purposes (e.g. one time calculation) is exempt from requirements in 800000-LTG-5400-08 and 800000-LTG-7100-02. Calculation PS-CABLE-001, Revision 0, documents the review of the ampacity derating for installed cables, for historical purposes, to closeout the Thermo-Lag issue. In the opinion of the independent verifier, this is a one time calculation which is exempt from procedure 800000-LTG-5400-08 and 800000-LTG-7100-02 as explained above.

The following minimum requirements, per 800000-LTG-7100-02, do apply to this software. Validation of the sofbvare shall be performed and independently reviewed.

Also the program listing, verification and independent review shall be treated as a QA .

record. Validation of the software will be done by alternative hand calculation as shown in the following pages. The program listing, verification with review will be made a part of this calculation, which is a record. Quality Assurance (QA) was contacted and the use of this software for this calculation was discussed. QA concurred with this independent verifier's opinion to treat this use of software as a one time calculation.

The computer listing is a hard copy of the logic steps/commands of how the computer program operates (runs). The purpose of the program listing is to enable the computer program to be recreated and/or run at some future date. In the case of MATHCAD,there really is no official "program listing" because MATHCADis a mathematical "number cruncher". Therefore, no computer listing is included in calculation PS-CABLE-001, Revision 0. However, attachment 2 is a copy of the input screen for MATHCAD. This input screen identifies the version of MATHCAD,mathematical model, and specific directions to replicate the correction factors as documented in the calculation.

g 77~c~~irpt r Calc. PS-CABLE-001, Rev.0 Design Verification SH 2 of 4

~ g J

P

The MATHCADprogram was used to develop an equation to "predict" correction factors for fills >6 cables horizontaly. The mathematical model was generated using the following data from IPCEA-P-46-426 table VII:

¹ CABLES ADJACENT DERATING CABLES(t) 0.93 0.87 0.84 0.83 0.82 The equation MATHCADgenerated to "fit" these points is:

mf(t)= 0.8+0.129 e 0.073 e Where t is a number of cables directly adjacent to the cable of concern.

The validation of MATHCADwas verified by plugging in any of the number pair above.

mf(2)= 0.8+0.129 e + 0 073

= 0.8 + 0.047 + 0.027= 0.874 mf(3)= 0.8+0.129 e <'"'">+ 0 073 '""'"

= 0.8+ 0.028+ 0.016= 0.844 mf(5)= 0 8+0.129 e 0 073

= 0.8 + 0.010 + 0.006= 0.816 mf(12)= 0.8+0.129 0 073

= 0.8+ 0.000+ 0.000= 0.8 mf(20)= 0.8+0.129 0 073

= 0.8 + 0.000+ 0.000= 0.8 gQyPCh PIA7 Calc. PS-CABLE-001, Rev.0 Design Verification SH 3 of 4

In section 4.0 of the calculation, the ampacity for 3TC ~tI 6 Al cable is adjusted for 130'C (short time rating) in accordance with IPCEA-P-46-426 equation 5 as indicated below:

I'= I 0 (Tc'-Ta)/ (Tc-Ta)*(228.1+Tc)/(228.1+Tc')

Where I'= Ampacity @ 130'C I= Open Air Ampacity @ 90'C= 69 Amps Tc'= Conductor Temperature 130'C Tc = Conductor Temperature 90'C I'=69 0 (130-40/ (90-40)~(228.1+90/(228.1+130)

I'=69 0 (90/ 50)*(318.1/(358.1)

=87.25 Amps.

In attachment 3, Table 3 through 8 the actual watts are calculated using following equation:

Actual watts = Z" 3 n I R Note: 3 is used for 3TC cable.

ggh'Ci/wr~~w z-Calc. PS-CABLE-001, Rev.0 Design Verification SH 4 of 4

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