ML20115J825
| ML20115J825 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/23/1992 |
| From: | William Cahill, Walker R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TXX-92522, NUDOCS 9210280357 | |
| Download: ML20115J825 (5) | |
Text
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Log # TXX 92522 y
Fi1e # 10010
=
838.423
_r r
Ref, # 10CFR50.34(b)
TUELECTRIC October 23, 1992 Wiliam J. Cahill, Jr.
a.,-r vu a r,.,a,,,
U. S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET N05, 50-445 AND 50-446 ADVANCE FSAR SUBMITTAL - ELECTRICAL LINEUP FOR BOTH UNITS FOR UNIT 2 PRE 0PERATIONAL TESTING Gentlemen:
The attachment to this letter provides an advance CPSES FSAR submittal to facilitate NRC Staff review of the subject area in support of licensing Unit 2.
The attachment is organized as follows:
1.
A description / justification of each change, 2.
A marked-up copy of the revised FSAR pages (changes are indicated in the margin by the word " draft").
The attached material will be incorporated in CPSES FSAR Amendment 87 which is currently scheduled for December, 1992.
If you have any questicas regarding this submittal, please contact Jacob H. Kulangara at (214) 812-8818.
Sincerely,
/A
)
William J Cahill, Jr.
By:
M ES003v Roger o. waiter Manager of Regulatory Affairs for NEO 1
JHK Attachment c'-
Mr. J.
L. Milhoan, Region IV l
Resident inspectors, CPSES (2)
Mr. T. A, Bergman, NRR Mr.
B..
E. Holian, NRR n
e ymnge
CPSES1-FINAL. SAFTEY ANALYSIS REPORT ~(FSAR)
.fATTACH8ENT TO TXX-92522 AMENDMENT /
- . PACE Ifof'4 DETAILEO DESCRIPTION
.Page.1-Prefix Page-( Al A93Rdid)
~ 6t9M9 D11crietiom
- 0&R 423-45--
-2 See Sheet No(s) :46,46a Revised the electrical' lineup of Units 1 and 2 for
. Unit 2 preoperation'al testing to' identify the requirements separately when Unit:1-is in modes-1 through 4 modes 5'and 6 and when Unit 1 is defueled (ie. no fuel'in the Unit I reactor vessel)~'
consistent with the Unit I? technical. specification-requirements for the specific mode.
Added_ statement to the~effect tiiat safety evaluation is performed of the Unit 2_ test procedure to evaluate the impact on Unit I to ensure _that the performance ~of the test does not result in uncontrolled _or unanticipated interruption of power to Unit-1, Revision
-The original response was based on the assumption that Unit 1 is operational when Unit-2 preoperational' test--
is performed. However, Unit 1.is expected to be inia refuelling outage (;while Unit 2 testing isibeing carried out) for which the : original _ commitments _ are --
too restrictive and unnecessary to meet the technical specification _ requirements.
The changes-are consistent with the Unit I technical-specification requirements foi the different modes-of operation. This_ change.specifically identifies-the-electrical lineup:on Units,1 and 2 for-Unit 2 preoperational testing when-Unit 1:is'in modes Sjor 6.-
or defueled.
Change _ Request Number
- SA-92-803.1-Commitment Register Number :
Related SER : 8.2 SSER :22.
SER/SSER. Impact
- No-7 i
w 1
4
ATTACllMENT.to TXX-92522 CPSES/FSAR PAGE 2 oF 4
- Q423.19 Provide a description of the electrical lin:up for Unit--
i No. 2 during preoperational tests that will be conducted-to satisfy regulatory positions in' Regulatory Guide 1.41 for Unit No. 1.
Provide a description of the lineup for both plants during similar preoperational testire on Unit No. 2 subsequent.to initial criticality of_ Unit No.-
1.
The descriptions should address both normal and emergency power distribution systems.
Provide assurance that crossties will not exist which could cause loss of emergency bus power to one unit due to testing of the other unit.
R423.19 for Unit No. 2 equipment required to be energized prior 68 to completion of Unit 1 preoperational testing,-the Unit-No. 2 electrical lineup will be as follows:
6.9kV buses 2EA1 & 2EA2 preferred source Startup Transformer XST1 6.9kV Buses 2EA1 & 2EA2 alternate source - Startup 68 Transformer XST2 6.9kV Buses 2A1, 2A2, 2A3, & 2A4 source - Startup 68 Transformer 2ST, or backfeed through 2MT1, 2MT2 and 20T The electrical. lineup for both units during Unit No. 2 preoperational testing will be as follows:
Unit No. 1 If Unit 1 is in Modes 1, 2, 3,.or 4, the A.C. and-D' RAFT D.C. electrical power sources for Unit I will meet the requirements of Unit 1 Technical Specification 3.8.1.1'and 3.8.2.1 respectively and the Unit.1
-electrical distribution system will satisfy Techr.ical Specification 3.8.3.1.
423-45 Draft Version
ATTACIU4ENT to' TXX-92522.
PACE 3 oF 4 CPSES/FSAR If Unit 1 is in Mode 5 or_ Mode 6, the A.C. and ORAFT 0.C. electrical power-sources for Unit I will meet' the requirements of Unit 1 Technical Specification 3.8.1.2 and 3.8.2.2 respectively and the Unit 1 electrical distribution system will satisfy Technical Specification 3.8.3.2.
If Unit 1 is not in any of the modes 1-through 6 DRAFT (i.e., no fuel in the Unit I reactor vessel) the Unit 1 electrical distribution system will be configured as necessary to ' support Unit 1 activiites. Appropricte precautions will be taken to ensure spent fuel pool water levels is maintained as required by Technical Specification 3.9.10.
UnitNo.2(InitialLineup)
DRAFT 6,9kV buses 2EA1 & 2EA2 preferred source - Startup Transformer-XST1 6.9kV Buses 2EA1 & 2EA2 alternate source - Startup 68 Transformer XST2 6.9kV Buses 2A1, 2A2, 2A3, & 2A4 source Startup 68 Transformer 2ST Follow mg tho initial Unit 2 lineup, the Unit ~2
-DRAFT clectrical distribution' system will be configured as necessary to verify load group assigr.ments in l-accordance with the test procedure.
If Unit 1 is in any of the Modes 1 through 6, the Unit 1 DRAFT electrical distribution circuits will be lined up to preclude not only the loss of all sources to Unit'No.1-emergency buses, but also-to eliminate the possibility of distribution system crossties which could cause the loss of required emergency bus power _due to testing of Unit 2.
Although portions of the emergency bus may_be deenergized when Unit 1 is defueled, the Unit 1 electrical distribution system will be configured as l
423-46 Draft Version u
'ATTACllMENT t'o TXX-92522 !
CPSES/FSAR l
.... PACE 4 0F 4
.necessary to support Unit 1 activities. A safety ORAFT
^
evaluation will be performed of the Unit 2 test procedure'to evaluate the impact on Unit 1 to ensure that performance of the Unit 2 test does not result in uncontrolled or unanticipated interrruption of power to Unit 1.
L 423-46a Draft Version