ML20246L112
| ML20246L112 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/31/1989 |
| From: | William Cahill, Walker R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TXX-89637, NUDOCS 8909060229 | |
| Download: ML20246L112 (12) | |
Text
,
3 2
g.1 p.,.
k aNmmer Log.)TXX-89637.
"""ll 4-1 File # ' 10010 C-C
.908.3 Ref. #-10CFR50.34(b) 9gggLgg7pjg August 31, 1989
- Executier Vice hesident t
U.'S. Nuclear Regulatory Commission Attn: Document Control Desk-Washington, D. C. :20555
- i. ;
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATIUN'(CPSES)
DOCKET N05. 50-445 AND 50-446 ADVANCE FSAR SUBMITTAL PRIMARY AND SACKUP PROTECTION FOR CONTAINMENT u
ELECTRICAL PENETRATION CIRCUITS Gentlemen:
sThis letter provides an advance copy of changes ~to be included in a future FSAR amendment. dealing with the primary and backup protection for certain containment electrical penetration circuits.
'In order:to facilitate NRC staff review of these changes, the enclosure'is organized as follows:
1.-
Draft revised FSAR pages, with changed' portions indicated by a bar in the margin, as they are to appear in a future amendment (additional pages immediately preceding and/or following the revised pages are provided if needed to understand the change).
2.
' Lina-by-line description / justification of each item revised.
3.
A copy of r elated SER/SSER sections.
4.
An index page containing the title of " bullets" which consolidate and categorize similar individual changes by subject and related SER section.
5.
The bold / overstrike version of the revised FSAR pages referenced by
-the description / justification for each item identified above. The bold / overstrike version facilitates review of the revisions by highlighting each addition of new text in bold type font and overstriking with a slash (/) the portion of the text that is deleted.
'6909060229 890831 g
PDR ADOCK 05000445 l
PDC 400 North Olive Street LB Bi Dallas, Texas 75201 w_=_:_.-_-----
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TXX-89637 August 31, 1989 Page 2 of 2 If you have any questions regarding this submittal please contact Joe Harnden at (214) 812-8226.
Sincerely.
$Y 6et1 f-
.)
William J. Cahill. Jr.
- 4 W of By:
Roger #D. Walker Manager. Nuclear Licensing WJH/vid Enclosure c - Mr. R. D. Martin. Region IV Resident Inspectors. CPSES (3)
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' Enclosure to TXX-89637 August 31,,1989; 1
Advance FSAR ' Change Regarding Primary and Backup r
L Protection for Containment Electrical Penetration Circuits.
i Item 1
' Draft Revise'd FSAR Pages-pg. 2 thru 4-
.lItea 2 Description / Justification.
pg. 5.
l Item 3 Related SER/SSER Pages
.pg. 6 Item 4
~Index,Page.Containing the Title pg. 7-of " Bullets"
~ Item 5 Bold /0verstrike Version of pg. 8 thru-10 Revised FSAR Pages Pg. 1 thru 10 i
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SEndiosure io h X-89637!
~ CPSES/FSAR PageL2~offl0,
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-f..
Rod Control System Lift and Gripper Coil Circuits -
0040.69-The' primary. and backup protection' of the Lift Coil circuits -
DRAFT f
.is provided by.the current limiting-feature of the control sources in combination with fuses.
For.the. Gripper Coil circuits, primary and backup protection is provided by fuses.
66
-g.
Pressurizer Heater Circuits -
0040.69
- 1. '
Control Group -
- The primary and backup protection' 75 of these circuits is'provided by-two feeder breakers in series.
2.
Backup Groups'-
The primary _ and backup-protection 75 of these circuits is provided by.
l the branch circuit breaker and the.
panel incoming breaker.
66 h.
Motor Space Heaters 0040.69-1.
Heaters of motors fed fromL 480V SWGR -
8 Primary and backup protection are provided by separate 8
circuit breakers.
66 2.
Heaters of motors fed from 480V MCC's -
8 Fuses are used as primary and backup protection 8
devices.
66 68 0040.69 1.
A. C. Lighting Panels Feeders -
8 0040.69 Primary and backup protection are provided by separate 8
circuit breakers.
i Draft Version 8.3-46
)
___ __ _ _ _ _ _ _- _ D
L-Enclosure to TXX-89637 Pag 3 3,of 10 CPSES/FSAR
.0040.69 52 s.
Fire Protection / Detection System -
0040.69
~~
DRAFT Primary and backup protection is provided by fuses and breakers, respectively.
0040.69 52 t.
Fuel Transfer System -
0040.69 52 115V, AC control circuit conductors of this system 68 penetrata containment. These circuits, including pencet jtfen conductors are protected against overcurrent by two tror in series (primary and backup protection).
0040.69 56 u.
Emergency Evacuation System Warning Lights -
0040.69 68 The primary and backup protection of these circuits is provided by means of a fuse and a circuit breaker, respectively.
68 v.
In-Core Flux Mapping System -
68 The primary and backup protection for this systen is provided by means of two fuses in series.
68 w.
Plant Communication System -
68 The primary and backup protection for this system is provided by means of a fuse and circuit breaker.
respectively.
l 68 x.
Containment Door Position Limit Switches -
]
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l I
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8.3-49 Draft Version i
Encl osuri to 'TXX-89637 CPSES/FSAR i-
- Paga 4 ofL10
].
Backup protection is provided by a power supply with an DRAFT L
automatic current limiting' feature which limits the current-to a tolerable level adequate for penetration protection.
. Primary protection for this circuit is provided by means of a-breaker, y.
Rod Position Indication Cabinets -
68-Power circuits from 120V distribution panels.
Breakers.
68 are used.as primary and backup _ protection devices.
66 68 7.
Compliance With NRC Regulatory Guide 1.75 [15] and IEEE 384 [31]
The CPSES design complies with the intent of NRC Regulatory Guide 60 1.75 and IEEE 384 (Refer to Appendix'IA(B)).
Physical separation of redundant safety-related equipment and wiring is achieved by location in separate rooms or by providing~ barriers.
Isolation devices are provided to preclude interaction between Class 1E and associated circuits and non-Class IE circuits, as described in the following paragraphs.
Electrical isolation methods are used as required in power.
68 control and instrumentation circuits to maintain.the independence of redundant circuits and equipment such that protective functions required during and following any design basis event is accomplished.
Different types of isolation devices are used for power, control and instrumentation circuits.
Isolation devices meet the criteria and performance requirements 68 specified in IEEE 279-1971, Revision 1. and are qualified in accordance with IEEE 323-1974 and 344-1975.
Draft Version 8.3-50
EIc1 stra to TXX-89637 DETAILED DESCRIPTION-
.Page 5,of 10 I
FSAR Page (as amende(1 Group Description
'8.3 3
' Clarifies the mean's-of primary and backup protection for:the Rod Control System Lift 'and Gripper Coil circuits.
-1 Cl ari fi c~.ti on:
The Gripper Coil uses fuses for~ circuit protection without reliance on current limiting. This change is consistent with the latest revision of calculations.
FSAR Change Request Number: 89-616.1 Related SER Section: 8.4.1 SER/SSER Impact: Yes FSAR conflicts with SER but was reviewed by NRC for this in Amendment 75. This change is-conservative to the description in Amendment 75.
8.3-49 3
Corrects the means of p imary and backup protection for the Fire Protection / Detection System.
Correction:
Corrects the means of primary and backup protection for the' Fire Protection / Detection System to be consistent with latest revision of calculations (the description was accidentally reversed).
FSAR Change Request Number: 89-616.2 Relate,s SER Section: 8.4.1 SER'SSER Impact: Yes Part of current.NRC review.
8.3-50 3
Revises the means of primary and backup protection for the Containment Door Position Limit Switches.
Revision:
Revises the means of primary and backup protection for the Containment Door Position Limit Switches to be consistent with the latest revision of CPSES calculations.
FSAR Changs Request Number: 89-616..-
Related SER Section: 8.4.1 SER/SSER Impact: Yes Part of current NRC review.
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_-____________i..____
Enclosura to TXX-89637 i
Page 6,of 10 8.4 Other Electrical Features and Requirements for Safety 8.4.1 Containment Electrical Penetrations In order to meet the requirements set forth in IEEE Standard
\\'
" Electrical Penetration Assemblies in Containment Structures fo
~
317-1972, 1
Generating Stations," as augmented by the recommendations of Regulatory Guide 1.63, the containment electrical penetration assemblies for Comanche i
Peak are designed to withstand, without loss of mechanical integrity, the maximum available fault current long enough to allow backup circuit protection to operate, assuming a failure of'the primary protective device.
The circuit overload protection systems for electrical penetration assemblies meet the single-failure criterion.
discussed below to the containment electrical penetration circuits.The a Reactor coolant pumps are the only 6.9-kV loads inside the containment.
primary and backup protection of these circuits is provided by means of a reactor The coolant pump breaker and a bus incoming suppl these breakers comes from different sources. y breaker.
DC control power for tory Guide 1.63 and acceptable.
This is in accordance with Regula-The scheme for the 480-V switchgear motor feeder circuits is the same as for the 6.9-kV circuits.
from different de breakers.DC control power for the primary and backup breakers is For the 480-V MCC outgoing feeders, two breakers are used in series in each circuit.
One is a primary and the other is a backup device.
For the control circuits of the 480-V MCC outgoing feeders, two identical fuses are used in series in each ungrounded leg of the 120-V ac control circuits.
One is a primary and the other is a backup device.
DC circuits are supplied from the ungrounded de power systems.
The primary and backup protection of the 125-V de lighting panel feeder and the 125-V de for solenoid operated valves is provided by circuit breaker and fuse in each case.
For rod control system lif t and gripper coil circuits, fuses are used as primary and backup protection devices.
Primary and backup protection for the electric hydrogen recombiner is provided by two identical breakers in series.
At each voltage level, the applicant is periodically testing the penetration protective devices.
have been designed in accordance with IEEE StdThe Comanche Peak electrica 317-1972 and are protected in accordance with Regulatory Guide 1.63 and, therefore, are acceptable.
8.4.2 Thermal Overload Protection Bypass Motor-eperated valves with thermal overload protection devices for the valve motors are used in safety systems and their auxiliary supporting systems.
Operating experience has shown that indiscriminate application of thermal overload protection devices to the motors associated with these va'ves could 8-14
. Enclosure to TXX-89637 Pg. 7 of 10
+
l' 8.4.1 Containment Electrical Penetrations 9.
The FSAR has changed the primary and backup (77) protection for certain containment electrical penetration circuits.
I 1
L1 Enclosure to TXX-89637 CPSES/FSAR (Page:8!ofE10=
f.
- Rod Control System Lift and Gripper Coil Circuits-0040.69-The primary and backup protection of the Lift Coil fMdid circuits is provided by the' current limiting feature of the
. control sources in combination with fuses.
For the Gripper Coil circuits, primary and backup protection is provided by a
fuses.
66 g.
Pressurizer Heater Circuits -
0040.69 L
i '
1.
Control Group -
The primary and backup protection 75 of these circuits is provided by two feeder breakers in series.
2.
Backup Groups -
The primary and backup protection 75 of these circuits is provided by the branch circuit breaker and the panel incoming breaker.
66 h.
Motor Space Heaters 0040.69 1.
Heaters of motors fed from 480V SWGR -
8 Primary and backup protection are provided by separate 8
circuit breakers.
66 2.
Heaters of motors fed from 480V MCC's -
8 i
i Fuses are used as primary and backup protection 8
devices.
66 68 0040.69 1.
A. C. Lighting Panels Feeders -
8 0040.69 Primary and backup protection are provided by separate 8
circuit breakers.
Bold /0verstrike 8.3-46 i
Version Ie
L Enclosure to TXX-89637 c.qPag2 9 of 10 CPSES/FSAR-0040.69 252c s.
Fire Protection / Detection. System -
t
.0040.69 68 Primary' and backup' protection is provided by fuses B/ddKdfd
- and breakers fddds, respectively.
0040.69 52 t.
Fuel Transfer System -
0040.69-52' 115V, AC control circuit conductors of this system 68 penetrate containment. These circuits, including I
penetration conductors are protected against overcurrent by.
two fuses in series (primary and backup protection).
0040.69 56 u.
Emergency. Evacuation System Warning Lights -
0040.69 68 The primary and backup protection of these circuits is provided by means of a fuse and a circuit breaker, respectively.
68 v.
In-Core Flux Mepping System -
68 The primary and backup protection for this system is provided by means of two fuses in series.
68 w.
Plant Communication System -
68' The primary and backup protection for this system is provided by means of a fuse and circuit breaker, respectively.
68 x.
Containment Door Position Limit Switches -
l l
8.3-49 Bold /0ve' strike Version
i l.
U-
. E 1 t.TXX-89637
!4 c *
' Backup P/fddtf protection is provided by a power supply 68 with an automatic current limiting feature which limits the H
current to a tolerable level adequate for penetration protection.
Primary BdtKdp protection for this circuit is -
provided by means'of a breaker fddd.
o y,
Rod Position Indication Cabinets -
68
' Power circuits from'120V distribution panels. Breakers 68 are used as primary and backup protection devices.
66 68 7.
Compliance With NRC Regulatory Guide 1.75 [15] and IEEE 384 [31]
The CPSES design complies with the intent of NRC' Regulatory Guide.
60 1.75 and IEEE-384 (Refer to Appendix 1A(B)).
Physical separation of. redundant safety-related equipment and wiring is achieved by location in separate rooms or by providing barriers.
Isolation devices are provided to preclude interaction between Class IE and associated circuits and non-Class IE circuits,'as described in the following paragraphs.
Electrical isolation methods are used as required in power, 68-control and instrumentation circuits to maintain the independence of redundant circuits and equipment such that protective functions' required during and following any design basis event is accomplished. Different types of isolation devices are used for power, control and instrumentation circuits.
Isolation devices meet the criteria and performance requirements 68 specified in IEEE 279-1971, Revision 1, and are qualified in accordance with IEEE-323-1974 and 344-1975.
Bold /0verstrike 8.3-50 Version
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