ML20101J753
| ML20101J753 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 12/02/1992 |
| From: | Lynn M SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | |
| Shared Package | |
| ML20101J726 | List: |
| References | |
| DC08490-008, DC08490-008-R03, DC8490-8, DC8490-8-R3, NUDOCS 9604020130 | |
| Download: ML20101J753 (6) | |
Text
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ES-412 ATTACHMENT I PAGE1OF2 REVISION 1 coq gowoi8 %V SUBJECT CODE SOUTH CAROLINA & ELECTRIC AND GAS COMPANY PAGE CALCULATION RECORD 1 OF 4
- CALCTITLE Deree Ckts DC759 A,CC79% CALC NO. REV STAT gpzA$mceeerT3'R* bt0TsWD 00g S A PARENT DOCUMENT SYSTEM SAFETY CLASS CAL CLASS 2 2 % NN QR gg gg y y; i ORIGINATOR DISC ORGANIZATION scarc, DATE XREF NO. h MC. Lpd EE s n/20/92 Dc-e49 -cc8 k#
A. CALCULATION INFORM ATION CONTENT DESCRIPTION: C SEE REVISION Urmik(PR ACFFDhhN(hl O[rCU[iq h 2r $c W m enf Ch ?) { h( St P (frrtPr (TSIYotL codduit
~
I AFFECTED COMPONENTS / ANALYSIS: J l
l CONTAINS PRELIMINARY DATA / ASSUMPTIONS NO f /YES, PAGES D COMPUTER PROGRAM USED: I O YES, VALIDATION NOT REQ'D (REF. 3.5} YES, VAllDATED (OTH ER5]
YES, VAllDATED [ES-4121 PROGRAM VALIDATION CALCU LATION O CONTINUED, ATTACHMENT B. VERIFICATION VERIFICATION SCOPE: @Yt NN kW Cf Mpq ad hp I b. CCAlh'C b5 C[ NM ()~)h/ d/9(7C)((
VERIFIER:
ASSIGN BY:
k Mor#3 SGCM i j y(( g y') (( h v -N.EAD ENGINEER (GESIGNEE)/DATE VERIFIER /DATE -
APPROVA DATE w 0 25M //f 3nl1 V C. RECORDS REEL FRAME TO PR'i k\ INIT/D'ATg 1 "A.
ORIGINAL MAINTAINED BY:
Y SCE&G DE VENDOR 9604020130 960329
'.> D R ADOCK 05000395 SCE&G
_ P __
PDR DISTRIBUTION: CALC FILE [ORIGINAll DSE SGC- / SYSTEM ENG\0 AuTbE FILE 20.6602 [ ATTACH. I ONLY, COPY)
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+ . _ . . . . . . . _ . - . .- . - - . - - _ - . _ . . . -
ES 412 ATTACHMENT I PAGE2OF2 REVISION O SOUTH CAROLINA ELECTRIC & GAS COMPANY PAGE REVISION
SUMMARY
2 OF i CALCULATION NO.
SUMM ARY DESCRIPTION i REV NO. g
()E VE LOPMV A)f CF NE l>> C AL C U LA TICA) NvM6CA ,
1 GAIGY I AI /1 CC OILD R V LE WifM E6- 412 REV O l l
6 . l a- ew&T m ,
l
[ ] CONTINUED ON PAGE /
- [A m
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- POWER AND INDUSTRIAL SYSTEMS DIVISION - READING PAGE [ OF [
[ -]
P ROJ E CT :
CALCULATION IDENTIFIER V. C. Summer Nuclear Station DC-849-00R
! ggggg A SU BJ E CT: .I4E4 A,D6E/4A Ap 3(:qES2A C L ASSI FIC ATION I Compones ) Derate Ckts.MCE4A,for TSI Fire Barrier NSR
/ bECTION N AME AND NUMBE R" MKF'-2/ 572 *0 go 422.
l Flectrical Ennineerinc / 0421 MRF-21 %9 - 50-41R REVISION O 1 2 3 w et.cns 6,2, 5+ction 5 ITEM (S) REVISED Qg ye 2 te 3 ORIGINATOR k %
a dwu w u
j DATE Of-gf,-86 o 2 - lo)-6 8 6&L6-88 REVIEWER / VERIFIER gg,% gvf/f,, C, CISEr. wf DATE t-2 f'- 88 g/23h 4-2 %-b &
APPROVAL
[/k h dlb i DATE l-2.B-86 l'-7,3-88 4-2.S -M ASSUMPTIONS / PRELIMINARY DATA [t u 4 YI d \
PAGES REFERENCE g g g THIS CALCULATION REQUIRES O REVIEW PER E-1 NO. 9 @ VERIFICATION PER DCP 2.05 RESULTS ARE NOTED BELOW.
I REMARKS REMARKS REMARKS REMARK 5 THE REVIEW OF THE CALCUL ATION INCLUDED EVALUATION AGAINST THE FOLLOWING QUESTIONS:
WERE INPUT 5, INCLUDING CODES, STANDARDS, AND REGUL ATORY REQUIREMENTS, CORRECTLY Y6'$
SELECT 2D AND APPLIED?
ARE ASSUMPTIONS REASONABLE AND ADEQU ATELY IDENTIFIED?
HAVE APPLICABLE CONSTRUCTION AND OPERATING EXPERIENCES g BEEN CONSIDERED?
l l
WAS AN APPROPRI ATE CALCULATION METHOD USED?
l 15 THE OUTPUT RE ASONABLE COMPARED TO INPUT 5?
Gilbert / Commonwealth ,
THIS IS A PERMANENT DESIGN RECORD DO NOT DESTROY
d SUBJECT Derste Circuits MCEAA.DGE4A. DGE14A.
and DGE32A for Tst Fire Barrier *
) Gilbert Associates,inc. _
Reading. Pennsylvania 4
't MICROFILMED paws CALCULATION g,,g,,,,gg ,y j c H,,,, ,,,,p, DATE 01 76-88 c2-f9-88 2
- ZW W $
1 PURPOSE To determine the new ampacity for the 125Vdc 'A' train power circuits MCE4A, DGE4A, DGE14A, and DGE32A because a section of conduit, through which the circuits are routed, was wrapped with TSI fire barrier material in fire zone CB-2 room 12-04.
- 2. DESIGN INPUTS I
DI-832-011 and DI-832-012
- 3. COMPUTER PROGRAM USED None
- 4. ASSUMPTIONS 6.8 percent ampacity derating for cables in conduit with a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> wrap is as shown in TSI catalog, dated October 1982. Since the derating factor for TSI wrapped raceway is questionable, this calculation will conservatively assume a 28 percent ampacity derating as indicated by test results for cable in trag as 2 I
telecopied by T5t. (Refer to G/C DlR No. DI-832-011, Attachment 5). *e cr+metic- cW ed : 2 ::n,0 - !
cc~e~::t b cep::,,_._,, y
- 5. CALCU LATION
' e The following identifies circuits and respective circuit parameters for 'A' tram circuits routed through XX-7177A - 3.0" G.
Circuit No. Conduit No & Size B/M No. OD MCE4A 1-2-1/0 AWG A25 1.22" '
32B Q DGE4A 1-2-6 AWG *iHP .0.82" O.8 7 DGE14A 1-2-2 AWG A3A 1.09" DGE32A 1-2-10 AWG A3D 0.61" Circuit parameters are as provided by G/C drawing No. 5-200-912, Table 1.
e The following conductor sizes and ampacities are applicable to aforementioned circuits, and are as provided by V. C. Summer Project Design Criteria Section 4.10, for 600 Volt rated cable in single lay power (SLP) tray in 40*C ambient air (cable in conduit is conservatively assumed to be the same as cable in SLP tray). gg PfY-
[
Cc .Lt Size Ampacity
- 1/0 AWG 130 amps
- 2 AWG 96 amps
- 6 AWG 55 amps
- 10 AWG 28 amps e The following are maximum short term full load amps for 'A' train feeder cable, per G/C Calculation No.
DC-832-010, Table 3A-1:
Circuit Number. Time Followino LOOP Maximum Current DGE4A (was DGE1 A) Oto 2.25 seconds 3.877 amps DGE14A (was DGE11 A) 6 to 10.25 seconds 10.554 amps DGE32A (was DGE25A) 6 to 10.25 seconds 2.69 amps PROPRIETARYINFORMATION OF GILBERT ASSOCIATES INC FOR INrERNAL UsE ONLY yllS ISMM_ANENT RECOR_D DO NOT DESTROY
l SUBJECT Derate Circuits MCE4A, DGE4A. DGE14A,
- 6
') Gilbert Associates,Inc. and DGE32 A for Tsl Fare Barrier C-849-008 3 l
l Reading, Pennsylvania REVl d j 2
[ 4 "U '#GES
! CALCULATION ORIGINATOR c u,ww c*A44( g DATE 01-26-88 07 - (*) - 8 8 M2.8 -$ $
- 5. CALCULATION (continued):
l
- 3" O conduit I.D. is approximately 3.068" lll l
- Maximum short term (0 to 2.25 seconds following LOOP) full load amps for the 'A' train main control board feeder cable MCE4A is 42.375 amps, per G/C calculation No. DC-832-010, Table 1 A, Circuit 8A.
- Derating factor for cable in conduit with 40% conduit fill for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> barrier is 28% (refer to assumption).
! Reauired Circuit Ampacity e Required Ampacity for MCE4A = (42.375 amps)(1.10 load uncertainty)(1.05 future load growth) l = 48.943 amps or 49 amps e Required Ampacity for DGE4A = (3.877 amps)(1.10 load uncertainty) l l = 4.7647 amps or 4.3 amps e Required Ampacity for DGE14A = (10.554 amps)(1.10 load uncertainty) l = 11.6094 amps or 11.6 amps e Required Ampacity for DGE32A = (2.69 amps)(1.10 load uncertainty) l
= 2.959 amps or 3 amps I I
g Conduit Fill q Conduit Fill = 3.1417 [(1.22/2)2 + (MI/2) 2 + (1.09/2)2 + (0.61/2)2]+ 3.1417 (3.068/2)2
= 3.1417 [0.3721 +.&468T + 0.2970 + 0.0930] + 7.3927 b
- o. e2,
= gor 40%
Percent fill is equal to or less than 40%; therefore, the conduit fill is in accordance with the T5I catalog data.
Derated Circuit Ampacity e Derated Circuit Ampacity for MCE4A = (130 amps)(1 - 0.28 derate per TSI) + 1.10 safety margin
= (130 amps)( 0.72) + 1.10 i
! = 85.090909 amps or 85 amps !
l l e Derated Circuit Ampacity for DGE4A = (55 amps)(1 - 0.28 derate per TSI) + 1.10 safety margin
= (55 amps)( 0.72) + 1.10
= 36 amps !
e Derated Circuit Ampacity for DGE14A = (96 amps)(1 - 0.28 derate per TSI) + 1.10 safety margin
= (96 amps)( 0.72) + 1.10 j
= 62.836364 amps or 63 amps s Derated Circuit Ampacity for DGE32A = (28 amps)(1 -0.28 derate per TSI) + 1.10 safety margin
= (28 amps)( 0.72) + 1.10
= 18.327273 amps or 18 amps PROPRIETARYINFORMATION OF GILBERT ASSOCIATE 5 Nc " 4 tNTERNAL UsE ONLY TMISSA. PERMANENT _ REM DOO NOT_ DESTROY
' ^
SUBJECT Derate Circurts MCE4A.DGE4A. DGE14A, DC-849-008 4
) Gilbert Associates,Inc. and DGE32A for TSI Fire Q Reading, Pennsylvania REV.l
[ ] ] 4
\ ' '^" 5 CALCULATION ORIGINATOR e w...wd ,,0., CM DATE 01-26-88 o 2 -(S -F2 Conclusion Although the derating factor provided by T5I may not be exact; the 85 amps calculated ampacity of the
- 1/0 AWG cable exceeds the required 49 amps ampacity by a margin of 73% (i.e.,85 - 49 + 49), the 36 amps calculated ampacity of the #6 AWG cable exceeds the required 4.3 amos ampacity by a margin of 737% (i.e.,36 - 4.3 + 4.3), the 63 amps calculated ampacity of the #2 AWG cable exceeds the required 11.6 amps ampacity by a margin of 443% (i.e.,63 - 11.6 + 11.6), the 18 amps calculated ampacity of the I
- 10 AWG cable exceeds the required 3 amps ampacity by a margin of 500% 0 e ,18 - 3 + 3). These margins are in addition to the 10% safety margin and extremely conservative devating factor included in the calculation. Therefore, the circuit ampacity is acceptable after placement of a one hour T51 fire barrier on the conduit.
l l
i
)
I PROPRIETARY INFORMATION OF GILBERT ASSOCIATES INC.- FOR INTERN AL USE ONLY THISIS A PERMANENTRECORD DO NOT DESTROY