ML19250A564
| ML19250A564 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 10/09/1979 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 7910230701 | |
| Download: ML19250A564 (3) | |
Text
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UNITED STATE 3 i
NUCLEAR REGULATORY COMMISSION n
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Nl WASHING TO N. D. C. 20555
,g OCT 9 1979
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Docket No:
50-373/374 Mr. Byron Lee, Jr.
Vice President Commonwoalth Edison Company P. O. Box 767 Chicago, Illinois 69690
SUBJECT:
MARK II P0OL DYNAMIC LOADS PROGRAM - LASALLE COUNTY STATION, UNITS 1 AND 2
Dear Mr. Lee:
The Mark II lead plant program is essentially complete, and we are now planning our review of the closure program for the Mark II pool dynamic loads. A growing tendency of applicants to depend on plant-unique pro-gramt, rather than generic programs, during the past year makes it nec-essary for us to request definition of the pool dynamic loads programs being relied on by each Mark II owner, especially that part which falls outside the scope of the generic Mark 11 pool dynamic loads program.
We have believed for some time that joint efforts toward resolutior of issues on a generic basis results in substantial cost and schedule savings to the NRC, the industry, and thus to the public. We stu,1 this view in April 1976 during the early stages of our rev* w of i.. e Mark II program, and again in September 1978 when the Mark II lead plant acceptance criteria were issued. On July 24, 1979 the staff met with the Tiark II owners to discuss the closure efforts associated with the Mark II L<>ng Term Program. At this meeting, the Mark II owners stated that the generic programs associated with SRV and LOCA pool dynamic loads would be completed in 1979 and 1980, respectively.
However, the Mark II owners identified a number of plants requesting relief from the generic pool dynamic loads specifications. This resulted in a comparable number of new plant-unique programs. Little information has been pro-vided to the NRC defining these new plant-unique pool dynamic programs.
Considering the design differences between Mark II plants, and the various licensing schedules for plants, we see a limited need for re-liance on plant-unique pool dynamic load programs. The limitations on staff technical resources, however, make it possible for us to complete 1205 35\\
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. OCT 9 1979 our licensing activities for these plants in a timely manner only if the Mark II owners pursue a generic approach to resolution of ' pool dynamic load issues to the maximum extent practicable. For those areas where a completely generic approach is not acceptable, we encourage use of semi-generic approaches, as in the case of the lead plant owners and the KTG "T" quencher. Another possible sub-grouping would be to combine amlyses for plants with a common architect engineer.
We ask that you provide a description of those pool dynamic load tasks, outside the generic Mark II pool dynamic loads program, that are a part of your pool dynamic loads definition program.
Your response should in-clude the following information:
task description rationale for plant unique program task schedule documentation (contents and schedule).
This information should be provided to us by November 15, 1979, so that we can plan our review efforts. We anticipate a meeting to discuss these items at an early date following the submittal of the letters. The pur-pose of this meeting would be to determine the extent to which a generic or semi-generic approach has been pursued, and to obtain information needed by us to establish priorities for +,he review of the various plants. Until that time, we will continue to review the pool dynamic load program on a primarily generic basis. We intend to review non-generic pool dynamic load programs on the basis of available NRC resources, with review priorities for these programs established by the licensing schedule for each facility.
Sincerely, bk
,S.A.VargddActingAssistantDirector for Light Water Reactors Division of Project Management cc: See next page 1203 052
Mr. Byron Lee, Jr.
i cc: Richard E. Pov, ell, Esq.
Isham, Lincoln & Beale One First National Plaza 2400 Chicago, Illinois 60670 Dean Hansell, Isq.
Assistant Attorney General State of Illinois 188 West Randolph Street Suite 2315 Chicago, Illinois 60601 Mr. Roger Walker, Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 737 Streator, Illinois 61364 1203 053 4
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