ML20043F628
| ML20043F628 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 06/11/1990 |
| From: | Wambach T Office of Nuclear Reactor Regulation |
| To: | Shelton D TOLEDO EDISON CO. |
| References | |
| TAC-M75850, NUDOCS 9006150167 | |
| Download: ML20043F628 (4) | |
Text
.
4,,pmouq#o UNITED STATES g
NUCLEAR REGULATORY COMMISSION
{
t n
, c. t WASHINGTON, D. C. 20555
/
June 11, 1990
-i
.s
...o
-3 Docket No. 50-346 Mr. Donald C. Shelton Vice President - Nuclear Toledo Edison Company Edison Plaza - Stop 712 300 Madison Avenue Toledo, Ohio 43652
Dear Mr. Shelton:
SUBJECT:
SEISMIC AND LOCA LOADING ANALYSIS OF THE MARK-BZ FUEL ASSEMBLY FOR DAVIS-BESSENUCLEARPOWERSTATION(TACNO.M75850)
By letter dated February 5,1990, you submitted a request for changes to the Bases of the Technical-Specifications for the Davis-Besse Cycle 7 reload core.
The submittal involves, among other things, analysis for the inclusion of Mark-BZ fuel in the :: ext cycle. Our review for this reload is limited to the analysis of the seismic and LOCA loads for this new fuel. The changes to the Bases of the Technical Specifications were included in the issuance of Amendment No. 149 issued June 4, 1990.
j The staff has approved B&W's fuel assembly seismic and LOCA analysis methodology described in the Topical Report BAW-10133P.
However, this approval is restricted to the applications of B&W lowered-loop 177 fuel assembly plants.
Since Davis-Besse is a raised-loop plant, a separate application of seismic and LOCA analysis is required. You have performed such an analysis for Davis-Besse.
The Mark-B8A fuel assembly design used in the reload incorporates zircaloy in place of inconel for intermediate spacer grids (a Mark-BZ design). The analysis of the Mark-BZ fuel assembly for seismic and LOCA loading was based on methodology described in the approved BAW-10133P.
The most limiting condition, which is the mixed core of Mark-B and Mark-BZ fuel, was used to analyze the raised-loop plant' loading condition. The loadings from seismic and LOCA events were combined according to Appendix A to Standard Review Plan 4.2.
The results showed'that the combined seismic and LOCA loading is less than the allowable limit, thus no fuel assembly is damaged and the coolable geometry is maintained. Since an approved
($00$d$46 PDC DFo f p
Y, Mr. Donald C. Shelton 2
a
. methodology was used,~we conclude that the Davis-Besse seismic and LOCA analysis is' acceptable and the coolable geometry is maintained.
This completes our. review of this topic and Tac No. M75850 is closed.
Sincerely,'
r
. Thomas V. Wambach, Project Manager Project Directorate 111-3 3
Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation cc:
See next page l
l l
I l
l k
I T
- r-u-e
+
s.
Y I
~
l Mr. Donald C. Shelton Davis-Besse Nuclear Power Station Toledo Edison Company Unit No. I cc:
David E. Burke, Esq.
The Cleveland Electric Radiological Health Program Illuminating Company Ohio Department of Health P. O. Box 5000 1224 Kinnear Road Cleveland, Ohio 44101 Columbus, Ohio 43212 Mr. Robert W. Schrauder Attorney General Manager, Nuclear Licensing Department of Attorney Toledo Edison Company General Edison Plaza 30 East Broad Street 300 Madison Avenue Columbus, Ohio 43215 i
Toledo, Ohio-43652-Mr. James W. Harris, Director Gerald Charnoff, Esq.
(Addressee Only)
Shaw, Pittman, Potts Division of Power Generation and Trowbridge Ohio Department of Industrial Relations 2300 N Street N.W.
2323 West 5th Avenue Washington, D.C. 20037 P. O. Box 825 Columbus, Ohio 43216 L
Regional Administrator, Region III i
U.S. Nuclear Regulatory Commission Ohio Environmental Protection Agency 799 Roosevelt Road DERR--Compliance Unit Glen Ellyn, Illinois 60137 PO Box 1049 1800 Watermark Drive Mr. Robert B. Borsum ATTN: Zack A. Clayton Babcock & Wilcox Columbus, Ohio 43266-0149 Nuclear Power Generation Division Suite 525, 1700 Rockville Pike President, Board of Rockville, MD 20852 County Commissioners of i
Ottawa County Resident Inspector Port Clinton, Ohio 43452 U. S. Nuclear Regulatory Commission 5503 N. State Route 2 Oak Harbor, Ohio 43449 State of Ohio Public Utilities Commission 180 East Broad Street L
Columbus, Ohio 43266-0573 L
l i
1
June 11, 1990
-Mr. Donald C.- Shelton 2-e methodology was'used, we conclude that the Davis-Besse seismic and LOCA analysis is acceptable and the'coolable geometry is maintained.
This completes our review of this topic and Tac Ho, M75850 is. closed.
Sincerely,
/S/'
Thomas V. Wambach, Project Manager Project Directorate 111-3 Division of Reactor Projects - III.-
t 4
IV, V and Special Projects Office of Nuclear Reactor Regulation cc: See next page i
DISTRIBUTION
'Docketyt11er NRC & Local PDRs-PD33 Reading File JZwolinksi PKreutzer 1
-TWambach OGC
.EJordan
=
l ACRS(10)
PD33 Gray File
- Region III, DRSP.
l l
l' l
l I
/
q PD33,LA PD PD33 P
zer.
TWambach/bj JHannon g/90 f/g/90 4/[(/90 DOCUMENT FAME: 75850 LTR
.