ML20004D233
| ML20004D233 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 06/05/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Lindsay W FEDERAL ENERGY REGULATORY COMMISSION |
| References | |
| NUDOCS 8106090049 | |
| Download: ML20004D233 (2) | |
Text
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UNITED STATES 8'
N.i NUCLEAR REGULATORY COMMISSION h
WASHINGTON, D, C. 20555 k..... j/
p June 5,1981 e
Docket No. 50-29 QY N
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Mr. William W. Lindsay, Director
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Dear Mr. Lindsay:
This is in response to your letter of May 21, 1981, concerning two evaluations done by the NRC staff and Yankee Atomic Electric Company, (YAEC) regarding the flood potential on the Upper Deerfield River.
I am enclosing a copy of the letter from YAEC, dated March 16, 1981, which forwarded their evaluation and response to our evaluation. It was not sent to you previously because of an oversight and I trust that you wi'.1 now be able to complete your review.
If you have any questions, please contact us.
Sin rely, y y g.
. Crutchfield, Chi Denn Operating Reactors Branch #5 Divis' ion of Licensing
Enclosure:
YAEC ltr. dated March 16,1981 8106090 W k
YRUKEE LTOEfl0 EE.ECTRlC C0hfP41!Y
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\\f.us&a 1671 Worcester Road, Frcmingham, Massachusetts 01701 2 C.2.1 I ANKEE FYR 81-42 N
March 16, 1981 United States Nuclear Regulatory Commission k'a s h in gt on,
D.C.
20555 Attention:
Mr. Dennis M. Crutchfield, Chie f Operating Reactors Branch #5 Division of Licensing Re f e renc e s :
(a) License No. DPR-3 (Docket No. 50-29)
(b) USNRC Letter (w/ Enclosure) to YAEC dated February 9, 1981 (c) Design Basis Flood Analysis, YAEC-1207, October 1980
Subject:
Yankee Atomic Electric Company Comments on Draft Safety Evalua? ion -
SEP Topics II-3.A and II-3.B (Partial)
Dear Sir:
As requested in Re ference (b), we are submitting our comments on the sta f f's dra f t report of Sys tema tic Evalua tion Program Topics II-3. A, H drologic Description, and II-3.B (Partial), Flooding Potential and Protection Requirements.
Yankee has rigorourly analyzed the flood potential in the Rowe area and is submitting its final report as Reference (c) of this letter. The conclusion of this study is that the Somerset and Harximan Dams will not be overtopped.
Although the Searsburg and Shecman Dans would be overtopped, the peak wa ter level at the Yankee Rowe site would be below the crest of the on-site flood protection barriers.
Based on Yankee's in-depth analysis of the potential maximum rainfall in this specific region, we must strongly dispute the conclusions and recomendations made by the NRC in Reference (b).
Yankee's basic disagreement with the Dra ft Safety Evaluation (Reference b) is with the conclusion that the rainfall from Hydrometeorological Report No. 33 should be used as the design basis rainfall.
Use of that report produces a generalized Probable Maximum Precipitation (PMP) estimate which is inappropriate for the Rowe site as explained in our a ttached report.
Fur th e rmore, the NRC staff's evaluation clearly states that "NRC regulations do not specifically require a PMP for the Design Basis Flood for nuclear power plants."
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