ML19309B116

Requests Addl Info to Complete Facility Environ Review. Forwards Specific List of Required Info.Reply Should Consist of Sequentially Numbered Revision to Final Environ Rept

ML19309B116
Person / Time
Site:	Grand Gulf
Issue date:	03/14/1980
From:	Ballard R Office of Nuclear Reactor Regulation
To:	Stampley N MISSISSIPPI POWER & LIGHT CO.
References
NUDOCS 8004030149
Download: ML19309B116 (3)

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DISTRIBUTION Docket File g 14 1980 r;ac pop, Local PDR flRRRjeaing Docket tios. 50-416 TERA and 50-417 NSIC THoughton TJahnson PCota EP-1 LA filssissippi Power and Light Company ATTri: :ir. N. L. Stamploy Vice President - Production and Engineering P. O. Box 1640 Jackson, Mississippi 39205 Gentlemen:

As a result of our continuing Gran1 Gulf environmental Review, we find that we need additional infomation to couplete our evaluation. The specific information required is identified in the enclosure to this letter. Your reply should consist of a sequentially numbered revision to your Final Environmental Report for Grand Gulf i:uclear Station and should be distributed as uas the Final Environmental Report.

When we receive the requested information we will be able to develop a schedule for tha remainder of our environnental review.

Sincerely, c.1;-) m :, a b':

p::ct._ : R; *.

Ronald L. Ballard, Chief Environmental Projects Branch 1 l

Division of Site Safety and j

Environmental Analysis j

Enclosure:

Request for Additional Infomation cc: See next page O

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Mississippi Power & Light Company Mark J. Wetterhahn, Jr., Esquire Conner Moore & Cober 1747 Pennsylvania Avenue, N.W.

Washington, DC 20006 Robert B. McGhee, Esquire Wise, Carter, Child, Steen & Caraway P. O. Box 651 Jackson, Mississippi Bechtel Power Corporation J. J. Tkacik, Project Engineer Grand Gulf Nuclear Station P. O. Box 607 Gaithersburg, Maryland 20760 Mr. Davis M. Starnes President, Claiborne County Board of Supervisors Pattison, Mississippi 39144

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QUESTIONS RELATING TO E. O.11988, FLOODPLAIN MANAGEMENT 1.

Provide descriptions of the floodplains*of all water bodies, including intermittent water courses; within or adjacent tu the site. On a l

suitable scale map provide delineations of those areas that will be 4

flooded during the one-percent chance flood in the absence of plant effects (f.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 a

pertinent parameters used in the computation of the one-percent flood flow and water elevation.

If studies approved by Flood Insurance j

Administration (FIA), Housing and Urban Development (HUD) or the i

Corps of Engineers are available for the site or adjoining area, the 4

details of analyses need not be supplied.

You can instead provide l

the reports from which you obtained the floodplain information.

3.

Identify, locate un a map, and describe all structures, construction activities and topographic alterations in the floodplains.

Indicate the status of each such structure, construction activit alteration (in terms of start and comoletion dates)y and topographic and work presently completed.

3

.I 4.

Discuss the hydrologic effects of all items identified in 3. above, Discuss the potential for altered flood flows and levels, both up-stream and downstream.

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 analysts used in response to 4. above.

The level of detail is similar to that identified in item 2. above.

6.

Identify non-floodplain alternatives for each of the items (structures, j

construction activities and topographic alterations) identified in 1

i

3. above. Alternately, justify why a specific item must be in the floodplain.

7.

For each item in 6. above that cannot be justified as having to be in the floodplain either show that all non-floodplain alternatives are I

not practicable or commit to re-locating the structure, construction i

activity or topographic alteration out of the floodplain.

l

• Floodnlain:

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 l

flooding in any given year.

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