TXX-6185, Forwards Test Repts 48422-1, Cable Separation Test Program & 48037-02, Electrical Raceway Separation Verification Testing. FSAR Changes Scheduled for Future FSAR Amend Also Encl
| ML20212D608 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/19/1986 |
| From: | Beck J, Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM), Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20212D614 | List: |
| References | |
| TXX-6185, NUDOCS 8701020113 | |
| Download: ML20212D608 (9) | |
Text
___
A, n-
.y o-TEXAS UTILITIES GENERATING COMPANY Log # TXX-6185
.EMAY TOWER e m Mom OuvE Marr. 8.3. 88 e DAM.AS, NAS h
. File # 10010 4
908.3 EU2",. *, JE".E;,
December 19, 1986 Director of Nuclear Reactor Regulation
-Attention:
Mr.- Vincent S. Noonan, Director g
Comanche Peak Project F
Division of Licensing i
U. S. Nuclear Regulatory Commission Washington, D.C.
20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION DOCKET NOS. 50-445 AND 50-446 FSAR AMEN 0 MENT
Dear Mr. Noonan:
Attached is an advance copy of FSAR changes scheduled for a future FSAR amendment. These changes result from testing and analysis performed to justify the separation between instrumentation and control cables and raceways at CPSES. The separation criteria was demonstrated to meet or exceed Regulatory Guide 1.75, Revision 1, and IEEE Standard 384-1974.
This change does not affect the existing commitments for power cable separation.
- The FSAR changes effect Section 8.3 and are summarized in Attachment 1. is the FSAR pages as they will appear amended. All changes are identified by an amendment number adjacent to the amendment bar.
In agreement with A. Cook of Nuclear Reactor Regulation on Occomber 15, 1986, due to thet bulky nature of the supporting test documents, copies of the Section 8.3)ylie Laboratories Test Reports (new References 41 and 42 for supporting W will be limited to one (1) enclosure with the original of this letter and three (3) enclosures with Ms. Cook's copy of this letter.
Very truly yours, to.c. M g 10 h h k h 45
. G.
ounsil
'1 A
By:
Vice President Nuclear Engineering WJH:grr Attachments (2)
Enclosure (originalonly)
\\
c-A. Cook (3 enclosures)
)
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0 ETXX-6185
Attachment 1.
$n.,dDecember 19,J1996
'Page 1 of 1
~~
ADVANCE CPSES FSAR AMENDMENT DETAILED DESCRIPTION 7
FSAR Page las amended)
Description 8.3-53
^ Revision:
Delineates previous separation criteria as applying to any raceway containing power cables.
8.3-54 Revision:
Delineates previous separation criteria as F
applying to power circuits. Deletes " maintained at" in same sentence, since.value listed represents a minimum criteria. Adds matrix table which describes the separation criteria to be used for instrumentation and control cables, conduits, and cable trays.
8.3-54a Revision: Changes " maintained" to " preferred", since value listed represents the desired separation rather than minimum criteria. Adds reference to the instrumentation r -
and control separation criteria matrix in paragraph 8.3.1.4, Item 5.
8.3-56 Revision: Adds reference to the instrumentation and control separation criteria matrix in paragraph 8.3.1.4, Item 5.
8.3-72 Editorial: Adds two new references to Section 8.3 which are the supporting test reports used to generate the matrix in paragraph 8.3.1.4, Item 5 (page 8.3-54),
i e
r-
-TXX-C C CPSES/FSAR
.0ecentier _
, 1985.
.Page 1 of17 evaluated'on'a case-by-case basis to ensure an acceptable level of redundant circuit independence.
'5.
Miliimum Separation Requirement f
In plant areas which are free from potential hazards such as k
missiles, external fires, and pipe whip, the minimum separation between redundant cable trays where either of the trays contains
[
power cables is three ft between trays separated horizontally and five ft between trays separated vertically. Also, in these areas, Rev.
the minimum separation between safety-related cond' ult and redundant cable tray, where either the tray or the conduit contains power cables, is three ft in both horizontal and vertical directions
- 1 whenever the conduit elevation is above that of the tray side 60 rails.
In the cable spreading area and the Control Room, the minimum separation between redundant cable trays is one ft between trays 1
separated horizontally and three ft between trays separated l0040.12 vertically.
The minimum separation between safety-related conduit and redundant cable tray in this area is one ft between these raceways separated horizontally and two ft between these raceways separated vertically whenever the conduit elevation is above that of the tray side rails.
60 In all plant areas free of potential hazards as described above, the minimum separtion required in any direction between redundant tray and conduit is one inch whenever the conduit is non safety-related or its elevation is not above the tray side rails.
All Nuclear Instrumentation System (N!S) cables are routed in conduit according to their channel assignment. A minimum separa-tion of 6 feet is maintained between NIS conduits and raceway containing 6.9 kV circuits.
Also, a minimum separation of 2 feet 41 g
is maintained from NIS conduits running parallel to 8.3-53
'ruvaim December'
, 1986-CPSES/FSAR Attachment'2 LPage 2 of 7.
l raceways containing electrical noise sources such as low voltage j'
power and rod control. cables.
1 The minimum separation distance between redundant Class 1E t
equipment and power circuits internal to the main control boards is six inches.
In this case, the wire and cables are flame-retardant with self-extinguishing and nonpropagating characteristics. Other components such as terminal blocks, wire troughs, wire cleats, raceways, cable ties, end so forth are manufactured from self-extinguishing material.
Where plant arrangements preclude maintaining the minimum separa-7 tion distances as stated above, solid tray covers, bottoms, or p
other barriers are provided between the redundant circuits.
The minimum distances between redundant enclosed raceways and between barriers and raceways are in accordance with l.dC Regulatory Guide 1.75[15]andIEEE-384[31].
I For instrumentation and control cables and receways, the minimum separation is as follows:
Control & Instrument Cable or Conductor Conduit (1) Cable Tray Cable or Conductor 1"(2) 1"(2) 1" Conduit (1) 1"(2)
(3) 1" Cable Tray 1"
1" 1"
Rev.
(1) Conduit may be rigid, EMT, SERVICAIR flexible, American 80A flexible, or Anaconda sealtite flexible.
(2) May be air or Bisco fire sealant and may be outside of, or within, equipment.
(3) 1/8" outside of equipment, may touch when inside equipment or inside Bisco fire sealant.
The above separation critoria has been demonstrated by testing and analysis (refer to References 41 and 42) to meet or exceed RegulatoryGuide1.75(15]andIEEE-384(31].
8.3-54
T TXX-6185 F
5Decem6er 19,t1986
' Attachment'2 Pege 3 of 7 Cable Spreading Area and Control Room 6.
3
]f The cable spreading area is the space below the Control Room where instrumentation and control cables converge' prior to entering the control, termination, or instrument panels.
This area does not b
contain high-energy equipment such as switchgear, transformers, b,
rotating equipment, or potential sources of missiles or pipe whip.
Flammable material is not stored or, installed in this area. Cable 41 I
constructions are qualified in accordance with IEEE 383 (30]. The circuits in this area are limited to control and instrument functions and those power supply circuits serving the Control i
Room.
Power circuits are not' routed in this area. except power cables serving instrument and Control Room distribution panels.
These power cables are encased in concrete or run in rigid steel conduits from the point where they enter this area.
In this area, a minimum separation of one ft horizontal an'd three Rev.
ft vertical is preferred between redundant trays. Where raceway arrangements preclude maintaining the minimum separation distance, the redundant circuits are run in enclosed raceways or barriers are provided between redundant circuits.
Where it is a impractical to meet the above requirements, for cables and raceways which are limited to instrumentation and control, the minimum separation distances are as listed in paragraph 8.3.1.4, Item 5.
' 7.
Electric Penetration Area Except for six penetrations, all individual penetrations are classified according to function and are restricted to exclusive 41 use for power, control, or instrumentation. These six penetrations are exclusively used for six different motor operated q
valves for both power and control.
In addition, 8.3 54 a L
L TX34185' CPSES/FSAR
.Eposemeer19.J986..
IAttachment 2.
y L ete14'of L
' penetrations used for the NIS cables are not used for any other P
I:'
purpose.
23 g N#
There are three electric penetration areas, one on each floor p
. elevation. Class IE penetrations are located on two different v
floor elevations, one train on each floor. The third (middle)
T floor area contains the-four channels of the NIS and two channels
-of.the RPS system. The remaining two channels of the Reactor Protection System (RPS) are located on the floor where train B
. penetrations are'1ocated. --The minimum center 1ine' separation between redundant NIS penetrations is six feet. The minimum j'
center line separation between penetrations of redundant channels of RPS, between.RPS and NIS, and between these channels and any other electrical penetrations, is 5 feet.- The minimum centerline separation between any two (2) non Class lE penetrations or any two (2) same train penetrations is approximately 2-1/2 feet. The minimum centerlino separation between any Class lE penetration and non-Class IE penetration is 3 feet.
8.
Hostile Environments Routing of cables for Class IE systems through an area where there is potential for accumulation of meaningful quantities of oil or other combustible material is avoided. Where such routing is unavoidable, only one system of redundant cables is allowed in any such area, and the cables are protected by installing them in conduits or solid bottom trays with solid covers.
In areas containing potential missiles, physical arrangement, protective barriers.'or pipe restraints preclude loss of redundant systems.
8.3 55
y
~TXX-6185~
CPSES/FSAR
- pecember 19, 1986' d Attachment 2
[ '*"
9.
Sharing of Cable Trays
[
Non-Class IE cables are separated from Class 1E cables and from associated cables. Non-Class IE cables, when they share the same raceway with Class IE cables or by virtue of power supply connection to Class IE buses, are associated cables and are so designated. As described in preceding sections, these associated
. cables are separated from non-Class IE cables and from Class 1E cables of trains and channels with which they are not associated.
This separation is maintained throughout the length of the cable (or circuit) until it passes through an isolation device.
I 10.
Spacing of Wiring and Components in Control Boards, Panels, and Relay Racks Separation of redundant devices and components is accomplished by mounting them on physically separated control boards. Where this mounting is not feasible from a plant operational point of view, and where operational design dictates that redundant equipment be in close proximity, separation is achieved by a six-in. minimum airspace or by a fire-retardant barrier. Where this is not possible, an analysis will be provided to show adequacy of separation.
Redundant circuits that serve the same protective or control function enter the control boards or panels through separated aperatures and terminate on separate terminal blocks or device connectors.
Where it is impractical to meet the above requirements, for cables and raceways which are limited to instrumentation and control, the Rev.
minimum separation distances are as listed in paragraph 8.3.1.4, Item 5.
8.3 56
iTXX-61@
CPSES/FSAR r 19.-1986:
tachment.2 Jaw 6 00 7. 11.
Cable and' Raceway Identification, Fire Protection, and Fire Detection Raceways and Class IE cables are identified with unique tag
~ numbers and a color coding system as discussed in detail in Subsection 8.3.1.3.
Tag numbers are cross-referenced with cable i
l i
i i
P 8.3 56a
-TXX-6185 CPSES/FSAR
- pacember 19, 1986 Page ' 7. o f 7 37.
IPCEA P-46-426, IPCEA Power Cable Ampacities, Volume 1, Copper
. Conductors, and Volume 2, Aluminum Conductors, Insulated Power Cable Engineers Association,1962.
I
- k....
38.
IPCEA P-54'-440, IPCWA-NEMA Standards Publication, Ampacities, N-Cables.in Open-Top Cable Trays, Insulated Power Cable Engineers Association, 1972 (NEMA WC 51-1972).
Y f.
39.
NEMA VE 1-1971, Cable Tray Systems, National Electrical Manufacturers Association.
40.
IEEE 80-1961 (Reaff 1971), Guide for Safety in AC Substation Grounding.
- 41.
Wyle' Laboratories Test Report No. 48037-02, Electrical Raceway Separation Verification Testing for the Texas Utilities Generating Company for use in the Comanche Peak Steam Electric Station Units Rev.
I and 2, February 6, 1986.
42.
Wyle Laboratories Test Report No. 48422-1, Cable Separation Test Program for the Texas Utilities Generating Company Comanche Peak Steam Electric Station Units 1 and 2, August 14, 1986.
5 8.3 72
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