ML20202G731
| ML20202G731 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 03/18/1986 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| NUDOCS 8604140477 | |
| Download: ML20202G731 (4) | |
Text
- - -
3
- i*
March 18, 1986 Docket No. 50-460 Mr. G. C. Sorensen, Manager Regulatory Programs Washington Public Power Supply 3000 George Washington Way P. O. Box 968 Richland, Washington 99352
Dear Mr. Sorensen:
SUBJECT:
REVIEW 0F EVALUATION OF ELECTRICAL CABLE TRAY AND CONDUIT SYSTEM SEISMIC DAMPING - WNP-1 During the course of the review of your October 19, 1985 submittal. we find that we need additional information in order that we may complete our review.
A list of the information requested is included in Enclosure 1.
This information request will provide the basis for discussions between the NRC and members of your staff at a meeting on April 9 and 10,1986 in Richland.
Arrangements for the meeting are being coordinated with Mr. Alan Hosler of your staff.
Sincerely, CMGIW MGum3r
' @iN 1 81%ge, -
John F. Stolz, Director PWR Project Directorate #6 Division of PWR Licensing-B
Enclosure:
Request for Additional Information cc w/ enclosure:
See next page DISTRIBUTIRN ACRS-10 Alan Hosler Gocket File)
BGrimes NRG PUR JPartlow L PDR GDick PBD-6 Rdg Ringram FMiraglia Gray File OELD EBrach EJordan H0rnstein
'PTKuo RLapinski
?k6 PBD-6 g
PBD ViIrick;cf CMcCracken JSto z,,
3//r//86 3////86 3/
86 8604140477 860318 PDR ADOCK 05000460 I
P PDR l
i
}
Mr. D. W. Mazur WPPSS Nuclear Project No. 1 Washington Public Power Supply System (WNP-1) cc:
Mr. V. Mani Nicholas D. Lewis, Chairman United Engineers & Constructors, Inc.
State of Washington 30 South 17th Street Energy Facility Site Evaluation Philadelphia, Pennsylvania 19101 Council 3
N Mail Stop PY-11 Nichol_as S. Rey'nolds, Esq.
Olympia, Washington 98504 Bishop, Liberman, Cook, Purcell and Reynolds 1200 Seventeenth Street, N.W.,
Mr. Eugene Rosolie Suite 700 Coalition for Safe Power Washington, D. C.
20036 Suite 527 408 South West Second Street Mr. E. G. Ward Portland, Oregon 97204 Senior Project Manager Babcock &~Wilcox Company Nina Bell P.O. Box 1260 Nuclear Information and Resource Lynchburg, Virginia 23505 Service 1346 Connecticut Avenue, N.W.
Resident Inspector /WPPSS NPS Washington, D. C.
20036 c/o U.S. Nuclear Pegulatory Commission P.O. Box 69 Richland, Washington 99352 Mr. R. B. Borsum Nuclear Power Generation Division Babcock & Wilcox 7910 Woodm'ont Avenue, Suite 220 Bethesda, Maryland 20814 G. E. Craig Ocupe, Esq.
j Washington Public Power Supply System i
P.O. Box 968 Richland, Washington 99352 Regional Administrator, Region V U.S. Nuclear Regulatory Commission, 1450 Maria Lane, Suite 210 Walnut C' reek, California 94596
l Enclosure Request for Additional Information Regarding Evaluation of Electrical Cable Tray and Conduit System Seismic Damping for WNP-1 I.
General Concerns
- 1). We have a general concern about the test set-up described in in Reference 1.
The earthquake time history input is achieved via a hydraulic actuator which is inclined at a 45W angle to the horizontal plane.
By using this method the time-history in the horizontal and vertical planes are not independent as required in SRP Section 3.7.2.
This appears to be a fundamental problem with the test program in that it makes it difficult 1
to endorse any of the results since the SRP criteria are not followed.
2)
The previously approved damping values for the plants listed in l
Reference 2 have been evaluated on a plant-specific basis without any generic implications. WNP-1 damping values must be considered on the same basis.
II. Specific Requests 1)
The comparison between the tested and the WNP-1 installed systems contained in the Appendix A of Ref. 2 is addressing cable tray systems only. Provide comprehensive information pertinent to the electric con-duit supports which would enable to assess similarities and differences between conduit supports installed and those tested in Ref.1.
2)
Appendix A to Ref. 2 appears to contain information limited to hanger type cable trays. Provide comprehensive data which would allow the staff to assess damping for cable tray supports other than hangers, i.e., floor or wall mounted.
In your response provide also the informa-tion pertinent to type of trays, connections and the corresponding data pertinent to electrical conduit supports.
3)
Provide a quantitative assessment of categories of cable tray and electrical conduit supports according to type of configuration, type of support, connections, cable arrangements, material, etc.
Indicate by percentage and the number how many supports fall in each category and specify the structures where they are located.
4)
Justify each of the statements contained in Appendix-A to Ref. 2~
that the differences between the tested and the installed systems have no bearing on damping.
5)
Provide information regarding the method of anchorage of the sup-ports of the cable trays and electrical conduits to the structures.
6)
Provide detailed information on how the evaluation of damping and the comparison between the tested and the~ installed systems were conducted.
In your response include the extent of analytical evaluation, examples of the procedures followed by the personnel performing the walkdown, their qualifications and similar information which allow to assess the depth of the evaluation process.
1
. MAR 5 866
References:
1.
Cable Tray and Conduit Raceway Seismic Test Program - Release (Final),
Test Report #1053-21.1; Vol. 1 & 2, December 15, 1978; Vol. 3, May 1980; Vol. 4, March 1981; ANC0 Engineers Inc.
2.
Evaluation on Cable Tray System Damping for WNP-1, Washington Public Power Supply System, Bechtel Power Corporation, San Francisco, California, August 1985.
l