120 Volt AC Short Circuit,Coordination Study & Protection.

666 Pages·2007·34.46 MB·English

ENCLOSURE 3
WATTS BAR NUCLEAR PLANT (WBN)
CALCULATION WBN-EEB-MS-TI07-0018
120V AC SHORT CIRCUIT, COORDINATION STUDY AND PROTECTION
9208260089 920615
PDR AD0CK 05000390
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TITLE : 120VAC Short Circuit, Coordination Study and Protection Plant/Unit
WBN/Ul
ARING.ORGANIZATION KEY NOUNS (Consult RIMS DESCRIPTORS LIST)
-B/S&L EEB. Calc. 120VAC 1E. Protection. Short Circuit
BRANCH/PROJECT IDENTIFIERS Each time these calculations are issued, preparers must ensure that the
original (RO) RIMS accession number is filled in.
WBNEEBMSTIO70018 nn Renv D (for 1R IMS' uns e) D 1 ~R~I~MS~ 1aocc ession nuAmA,b-, e..r.r
RO 2 f909 0l027 23D030 07 1 B2690'093216 400 1 0 10 0
APPLICABLE DESIGN DOCUMENT(S) 0
.WB-DC-30-27 (RO) R 109202 3000 1,,_132 '91 101 a a
WB-DC-30-4 (RS) R __ S ' B___1__8_2_ -___'_9_2__ _B_10_82_922_o1_2-_2 _1_22_88__3
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A jEfTION(S) UNID SYSTEM(S)
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N/A 'L~r4(* 'I/qf L.O0 i Iz FSAR 8.3.1.1 and 8.3.1.2.2 require that the
Prepared: p Lfro/q% 120VAC Vital Boards be adequately protected
Louis Mallararapu* __of__q__ from short circuits. Coordination is
Checked/Verified: required for selective tripping. Cable
T. B. Thorsell* In ______/__ thermal damage protecti on is requi red.
Reviewed: D £f.
T. B. Thorsell* ,,I',t 1O *y
_ __ LEGIBILITY "VALUATl D e
Approved:
ACCEPTED for issue.
M._C._Brickev*_____
Date sell
.90 (cid:1)-OF/v lav-1/4'&.1 - LD
U-FORM-I /I
List all pages added See Rev.
10534 bv this revisinn I An
I f MORE List all pages deleted See Rev.
ORIGINAL
SPACE by this revision I Log I
REQUIRED List all pages changed See Rev.
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Abstract: These calculations contain an unverified assumption(s)
that must be verified later. Yes E I No [XI
See page 1B for abstract.
See revision log for total pages and FSAR compliance.
*Refer to RD for original signatures: I/F)
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BRA CH/PROJECT IDENTIFIERS Each time these calculations are issued, preparers must ensure that the original (RO) RIMS accession
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RO V 09oo s 4c)o
APPLICBLE DESIGN DOCUMENT(S) 4 2
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number is filled in.
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Rev (for RIMS' use) RIMS accession number
9o o7 Z3 6 00071 lne °1o 5 O?21( 4-0
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R4 18 901204-503
APPLICABLE DESIGN DOCUMENT(S)
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TVA 10697 (DNE-6-86) DECA LCU LATIONS
<I/z~LCU
.(cid:2)-v.. (cid:2)
-TIrLE 120V AC Short Circuit (LA); Coordination PLANT/UNIT Watts Bar
ih Study and Protection I Nuclear Plant Unit-i
PEPARING ORGANIZATION EEB KEY NOUNS (Consult RIMS DESCRIPTORS LIST)
argent & Lundy EEB, Calc, 120V AC 1E, Protection, Short Circuit
BRANCH/PROJECT IDENTIFIERS Each time these calculations are issued, preparers must ensure that the original (RO1 RIMS accession
WBN-EEB-MS-TI07-0018 number is filled in.
Rev (for RIMS' use) RIMS accession number
0326 40,0
RO B26 '90
R
APPLICABLE DESIGN DOCUMENT(S)
WB-DC-30-27 RO R B26 ' 0 n 1 41
.
WB-DC-30-4 R5.
B26 '90 0 5 25 42 0
FSAR 3 8312 R8
'90
SAR SECTION(S) UNI D SYSTEM (S) B26 0628 41 0
_N/A N_/A - -
Revision 0 RI R2 R--3 Safety-related? Yes E No C
-4- 1 1
ECN No. (or indicate Not Applicable)- eA DA-1
Statement of Problem
N/A P-59zq7--A 1098364 ri~I 0AZ el
P*A'
Pr red -Sd-9 IA/10q ~~9 FSAR 8.3.1.1 and 8.3.1.2.2
__3_ a 7P d> * W
require that the 120V AC
.£j
Checked A7, Vital Boards be adequately
protected from short circuits
Reviewed £%04 .i l'L1/ Coordination is required for
selective tripping. Cable
I( ,C(;Z d. -L thermal damage protection is
required.
Date / I v / C}1/'A/ I /
1 3-ptI-fo 90 S,4rZfeO 417-6100
ORoGsA
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Abstract -1.
These calculations contain an unverified assumptions)
Q
that must be verified later. Yes 3 No
The 120V AC Vital Power System was evaluated to determine the adequacy of
protective devices, selective coordination of protective devices,
protection of cables from thermal damage during short circuit conditions
and the adequacy of control power transformer fuses. Various circuit
breakers do not have adequate interrupting capability. Selective
coordination cannot be demonstrated in several cases. Some cables are
not protected from thermal damage during short circuit conditions.
Replacement is recommended for some control power transformer fuses.
Ro:
FSAR Compliance Date __ _____
RI: RX Total Pages = 4___/
FSAR COMPLIANCE ,4Ie P Anie8 l
__ DATE _ _ _ _ _ _
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WBN-EEB-MS-TI0 7-00188 REVISION LOG
120V AC Sh9E Circuit 4E+"/e
Title Coordinati§AYnd Protection
DESCRIPTION OF REVISION
Revision Approved
0 Initial Release
ADDED ATTACH ME T P52'7A SM. I 5-. ADPE D p. 6A, Rev . P, ' +aw
FoR COMPLETE CALCULATION ADD REV.I TrO AEV.O
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Title: 'TUIJ° PNJD P&46T7&CTo(AJ wsN& e3 - S -Tro6 -c
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DESCRIPTION OF REVISION
No. Date
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CHECKED~~ DATE~
. Ca lc.# WBN EEB-MS-TI07-0018 Page 3'
Prepared:_______Date:____
Checked: I LDate:_____
Table of Contents
Section Contents Pagje
1 Cover Sheet (TVA Form 10697) 1
2 Revision Log (TVA Form 10534) 412
3 Table of Contents
CA-
4 FSAR Compliance
44
Cal--latien Centrl Chzkiz 4--
6 Calculation Design Verification Form
7 Calculations
1.0 Purpose
2.0 Assumptions6
3.0 Sources of Design Input Information
4.0 Design Input Data i
5.0 Documentation of Assumptions
6.0 Computations / Analyses i4
0Short Circuit
Coordination
Protection of Cables against Thermal Damage
Control Power Transformer
7.0 Supporting Graphics 1
8.0 Summary of Results
9.0 Conclusions
10.0 Attachments
Total___
ATTAC141MEI* No. 'P5zq.7A R
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