ML19274G162
| ML19274G162 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 08/08/1979 |
| From: | Parr O Office of Nuclear Reactor Regulation |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 7908300295 | |
| Download: ML19274G162 (3) | |
Text
jo, UNITED STATES
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..e AUG 08 B79 Docket Nos. 50-373 O
and 50-37 K Mr. Byron Lee, Jr.
Vice President Commonwealth Edison Company P. O. Box 767 Chicago, Illinois 60690
Dear Mr. Lee:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION CONCERNING LA SALLE COUNTY STATION, UNITS 1 & 2 As a result of our continuing review of the La Salle Final Safety Analysis Report, we find we need additional information in the area of core performance to continue our evaluation. The specific information required is listed in the Enclosure.
Please inform us after receipt of this letter of the date you can supply the requested information.
Please contact us if you desire any discussions or clarification of the information requested.
Sincerely, nD.
ar ief Light Water Reactors Branch No. 3 Division of Project Management
Enclosure:
As Stated cc w/ enclosure:
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il 11 Mr. Byron Lee, Jr. AUG 0 81979 i
cc: Richord E. Powell, Esq.
Isham, Lincoln & Beale One First National Plaza 2400 Chicago, Illinois 60670 Dean Hansell, Esq.
l Assistant Attorney General State of Illinois 188 West Randolph Street i
Suite 2315 Chicago, Illinois 60601 Mr. Roger Walker, Resident Inspector U. S. Nuclear Regulatory Commission i
P. O. Box 737 Streator, Illinoir 61364
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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION 230.0 CORE PERFORMANCE BRANCH 231.26 The requiremants for analyzing the asymmetric hydraulic horizontal load have been changed by the A-2 Task Force (Asymmetric Blowdown Loadt on Reactor Primary Coolant System) to include BWRs.
To satisfy the new requirements La Salle should perform a plant specific analysis of their plant using the best available methodology and criteria for your design. At this time, La Salle should provide the results of an analysis which shows that their fuel assemblies can withstand the asymmetric loadings.
La Salle should also commit to perform a further evaluation of their fuel following our approval of the generic analysis method should the methodology or criteria developed from this task warrant such reevaluation.
231.27 General Electric has recently informed us that the prior control rod design limit of 40 percent burnup of the B-10 content will lead to failure _for most of the control rods. A new design limit of 32 percent burnup of the B-10 cuatent has been recommended and is under review by us.
Confirm that La Salle is aware of this proposed change in control rod design life.
2032 379 I