ML19247A459
| ML19247A459 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 05/15/1979 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Counsil W CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| NUDOCS 7907310580 | |
| Download: ML19247A459 (2) | |
Text
-
l$ fi UNITED STATES NUCLEAR REGULATORY COMMISSION g
_ j. ;
5
-g.
j WASHINGTON, D. C. 20555
& ie Df $
May 15,1979 w
Docket t'o. 50-213 Mr. W. G. Counsil, Vice President Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company Post Office Boa 270 Hartford, Connecticut 06101 Dear Mr. Counsil'.
Enclosed for your infor: nation is a copy of a letter sent to one of the licensees of a 'destinghouse two loop plant.
A similar letter has been sent to the licensees of the other Westinghouse two loop plants. Note that the use of the rod bank excharge progran has not yet been approved for other than these two loop p' ants.
Sincerely, N
rG
.\\
x.-
,gw ix
- was m~
Dennis L. Ziemann, Chief Operating Reactors Branch =2 Division of Operating Reactors
Enclosure:
As Stated cc:
See next page 488 3y 7 0 0 7310 T "60
Mr. W. G. Counsil May 15, 1979 Cc Day, Berry a Howard Counselors at Law One Constitution Plaza Hartford, Connecticut 0C103 Superintendent Haddam Neck Plant PFD #1 Post Office Box 127E East ampton, Ccnnecticut 06;24 Mr. James R. Hirmeluright Northeas* Uti'.ities Service Company P. O. Box 270 Hartford, Ccnnecticut 06101 Russell Library 119 Broad Stree:
Middle:cwn, Cor.necticut 05J57 L
(
as.Jc
-ic:,
j' UNITED STATES NUCLEAR REGULATORY COMMISslON r
f
' j WASHINGTON, D. C. 20555 g
's
=. a..hj/
\\,
May 15, 1979 Docket No. 50-305 Mr. Eugene R. Mathews, Vice President Dower Supply and Engineering Wisconsin Public Service Corporation P. O. Cox 1200 Green Bay, Wisconsin 54105
Dear Mr. f'athews:
The Nuclear Regulatory Conmission staff has reviev.ed inforration submitted by the Westinghouse Corporation and two licensees of two loop plants regarding the use of the rod bank exchange (rod swap) method to verify shutdown margin for two 100? Westinghouse nuclear steam s9 ply.ystems. Based on our review, we approve the use of this meth:1 as an alternative to the boron exchange method of verifying 5.iutdown margin for these two loop NSSSs providing the following conditions are met:
i.
The analysis for predicting rod wort,'s and shutdown margin is performed by Westinghouse using the technique proposed to the NRC at the September 1978 meeting.
2.
All rod banks are measured.
3.
Written approval is obtai' leo from the NRC prior to use of the rod exchange method.
Approval will be based on NRC review of your review and acceptance criteria for thesc rod excnange tests. Once we approve your review and acceptance criteria, they need not be resubmitted unless changed.
4.
The test procedure for this method is that identified in a Westinghouse lctter to NRC datec April 24, 1979.
7906o."191
$y:
0
> r6
Mr. Eugerie R. Tiathews May i5,1979 5.
Within 45 days after the first verificaticn of shutdown margin using the rod baik exchange method, the test data is formally submitted to the NRC.
Th's approval is only for plants with a two loop 11SSS.
Additional iaformation and further review will be required before we can reach a conclusion on the use of this method for three and four loop plarts.
Sincereiy,
(
G cucME w A. Schwencer, Chief Operating Reactors Branch =l Division of Operating Reactors cc:
See next page d.0 0
'00 7s,
- / /
.