ML19344E497
| ML19344E497 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 08/05/1980 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Peoples D COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8009020126 | |
| Download: ML19344E497 (4) | |
Text
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UNITED STATES E })e-
.I WASHINGTON, D. C. 20555 g
NUCLEAR REGULATORY COMMISSION
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%~a y AUG 5 1980 Docket Nos.:
50-373 and 50-374 Mr. D. Louis Peoples Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Peoples:
Subject:
Request For Additional Information For LaSalle County Station, Units 1 & 2, Operating License Applications As a result of our continuing review of the operating license applications for the LaSalle County Station, Units 1 & 2, we have developed the enclosed request for additional information as a result of Executive Order 11988.
Please inform us af ter receipt of this letter of the date you can supply the requested information.
Please contact us if you desire any discussion or clarification of the enclosed request.
Sincerely, lo h.
Robert L. Tedesco, Assistant Director for Licensing Division of Licensing
Enclosure:
Request for Additional Informa tion cc w/ encl:
See next page I
8 009 o e o/AG A
Mr. D. Louis Peoples Director of ;;uclear Licensing Cem.T.onwealth Edison Coir.pany
?. O. Box 767 Chicago. Illinois 60690 i
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cc:
Rict ard E. Powell, Esq.
Isham., Lincoln & Eaaie i
One First National Plaza 2400 Chicago, Illinois 60570 Dean Hansell, Esq.
l Assistant Attorney General State of Illinois 183 'sst Randolph Street Suite 2315 l
Chicago, Illinois 60601 i
Resident Inspector. LaSalle ;?S U. S. Nuclear Regulatory Coamission P. O. Box 224 l
I4arseilles, Illinois 61341 I
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ENCLOSURE HYDROLOGIC ENGINEERING GENERIC QUESTIONS RELATING TO E.O.11988 FLOODPLAIN MANAGD'ENT FOR PLANTS NEAR COMPLETION Definition (fron Executive Order 11988 Floodplain Management)
Floodplain: The lowland and relatively flat areas adjoining inland and coastal waters including floodprone areas of offshore islands, including at a minimum that area subject to a one percent or greater chance of flooding in any given year.
1.
Provide descriptions of the floodplains of all water bodies, including inter-mittant water courses; within or adjacent to the site. On a suitable se. ale map provide delineations of those areas t' hat will be flooded during the one-percent chance flood.in the absence of plant effects (i.e., pre-construction floodplain).
2.
Provide details of the methods used to determine the floodplains in response to 1. above.
Include your assumptions of and bases for the pertinent parameters used in the computation of the one-percent flood flow and water elevation.
If studies approved by Flood Insurance Administration (FIA), Hobsing and Urban Deve..pment (HUD) or the Corps of Engineers are available for the site or adjoining area, the details of analyses need not be supplied.
You can instead provide the reports from which you obtained the floodplain infor-ma tion.
3.
Identify, locate on a map, and describe all structures and topographic alterations in the floodplains.
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4.
Discuss the hydrologic effects of all iteras identified in 3. above. Discuss the potential for altered flood flows and levels, both upstream and down-stream.
Include the potential effect of debris accumulating on the plant structures. Additionally, discuss the effects of debris generated from the site on downstream facilities.
5 Provide the details of your analysis used in response to 4. above.
The level of detail is similar to that identified in item 2. abo.ve.
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