ML19289D692
| ML19289D692 | |
| Person / Time | |
|---|---|
| Site: | Phipps Bend  |
| Issue date: | 02/23/1979 |
| From: | Regan W Office of Nuclear Reactor Regulation |
| To: | Niav Hughes TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 7903140137 | |
| Download: ML19289D692 (2) | |
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Attorney, OELD Docket flos. 50-553 WRegan/DScaletti 50-554 RSamworth JNorris MDuncan ACRS Tennessee Valle.1: Authority ATTil: ti. 8. Hughes Manager of Power 830 Power Building THIS DOCUMENT CONTAINS Chattanooga, Tennessee 37401 POOR QUAL.lTY PAGES '
Gentlemen:
In accordance with Condition 3.F.G of the Phipps Bend ?!uclear Plant Construction Permit, TVA submitted a report, on September 7, 1978, relating to the conceptual design of the shoreline screening device for the intake structure to be constructed at the Phipps Bend !!uclear Plant. The staff has reviewed the report and found that it is respon-sive to Condition 3.F.G and concurs.with TVA's choice of a single entrance, double exit, vertical traveling screen design. EPA has previously. concurred in the proposed design in a letter to Harry G, Moore, TVA, from Paul J. Traina, EPA dated December 21, 1978.
The staff concern at the CP review was that screens be installed at the Holston River shoreline rather than at the upstream end of an intake channel. The TVA proposal' satisfies this concern. The use of fine mesh screens to prote'ct larvae is an advancement which, although less critical to the licensing of the project, is admittedly beneficial environmentally. Although this report does not specify the environmental consequences of the conceptual design relative to the design described in the CP application, the report does state that laboratory results are available which indicate that the conceptual design has "pntential
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for large reductions in impingement and entrainment losses." He have reviewed tuo previous TVA reports which tend to support their optimism in this regard (" Investigations on the Pr'otection of Fish Larvae at Water Intakes Using Fine-Mesh Screening," TVA Technical flote fio. B22, February 1977, and "A Study on the Protection of Fish Larvae at Water Intakes Using Wedge-Wire Screening," John H. Heur and Bavid A. Tomljanovich, TVA,1977).
The staff's only concern with regard to the selected design related to the provision for a bypass around the fine mesh screens. The September 7, 1978 7903140137 d
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Tenness~ee Valley Authority FEB 2 3 Ign report did not give details on the bypass but only identified a " channel cut off device (later)". The staff agrees with the selected design; hoviever, prior to its operation, the conditions for any screen bypassing should be specified.
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Sincerely.
Ortgaa a:sned kg."
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i Wm. H. Regan, Jr., Chief Environmental Projects Branch 2 Division of Site Safety and 3
Environmental Analysis cc: Mr. James A. Domer Licensing Engineer Tennessee Valley Authority ts 303 Power Building
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Chattanooga, Tennessee 37401 Herbert S. Sanger, Jr., Esq.
General Counsel Tennessee Valley Autliority 400 Connerce Avenue, EllB33 Knoxville, Tennessee 37902 Mr. E. G. Beasley Tennessee Valley Authority 400 Cocmerce Avenue, W9C165 C-K Knoxville, Tennessee 37902 John C. White Regional Administrator U.S. Environmental Protection Agency, Region IV 345 Courtland Street Atlanta, Georgia 30308 DSE:EP-2 DSE
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