ML20055C088
| ML20055C088 | |
| Person / Time | |
|---|---|
| Site: | Skagit |
| Issue date: | 08/04/1982 |
| From: | Myers R PUGET SOUND POWER & LIGHT CO. |
| To: | Adensam E, Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| PLN-265, NUDOCS 8208100216 | |
| Download: ML20055C088 (3) | |
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puGET August 4. '982
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. PLN-265 Mr. Harold R.~ Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Attn:
E. Adensam
Subject:
Puget Sound Power & Light Company Skagit/Hanford Nuclear Project, Units 1 & 2 Docket Nos 50-522 and 50-523 Informational Request on the May Junction Monocline and the July 21, 1982 Meeting to Discuss Resolution of the Issue 4
Dear Mr. Denton:
l It is our understanding, through a series of productive meetings in May and July between your staff and Puget's consultants, that we have reached resolution of all geology concerns except the significance of the May Junction monocline. We are currently in the process of finalizing.the confirmatory material on all the resolved concerns and working towards a submittal at the. end of August to support an October SER addressing these matters.
The remaining concern, the significance of the May Junction monocline, was the topic of a meeting between our staffs on July 21, 1982.
The May Junction monocline is a short, down to the east, monoclinal fold trending north-south which lies just south of Gable Mountain and the Southeast Anticline. The NRC Staff has requested that the Applicant acquire additional data pertaining to the mode of origin and deformational history of this fold. The NRC Staff's postulation of a possible fault associated with the monocline-is based on their interpretation of seismic reflection profiles af doubtful quality ~ and seismic refraction data.
To date, our investigations have yielded no evidence of faults associated with this fold.
We are disappointed at the NRC Staff's request that additional field investigations be conducted at this time because: (1) detailed investigations to date have given no indication of a fault associated with the May Junction monocline; (2) the postulation that such a fault might exist is-based on interpretation of geophysical evidence of doubtful quality; and (3) that even if such a fault did exist, and was seismogenic.(capable), preliminary estimates of acceleration-at the Site from the i
maximum credible earthquake do not exceed the 0.35g S/HNP design criteria. We believe additional investigations will only confirm the existing body of knowledge which shows no reasonable indication of a fault and, as such, would more 1
appropriately be conducted as a program of confirmatory, post-Construction Permit j
investigations.
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On July 21, 1982 our consulta. Tis discussed with the NRC Staff the type of investigative program that might satisfy their concern. It was established that such a program should include the use of gravity, rotary-wash boring, and core boring data. We estimate that such a program could easily cost as much as $500,000.00.
Specifically, the program discussed with NRC and USGS Staff on July 21, 1982 consists of the following:
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Mr. Harold R. Denton August 4,1982 PLN-265 Phase I The acquisition of more detailed gravity data over the northern portion of the monocline so a more definitive picture of the configuration of the top of basalt can be constructed.
Phase II Drilling, logging and sampling of three rotary holes on the top, middle, and bottom of the slope of the monocline at a location agreed upon by the NRC and USGS Staff to establish the continuity and thickness units within the supra-basalt sediments and further define the basalt structure and configuration.
Phase III Drilling, logging and sampling of three to four core borings to the top of basalt across the monocline establishing in greater detail the stratigraphy and structure of supra-basalt sediments overlying the monocline in the vicinity of any still postulated fault.
Phase IV One core boring will be continued downward, by rotary wash drilling methods, through the Rattlesnake interbed in order to establish better control for the interpretation of the data secured in Phase II.
We wish to confirm the NRC's acknowledgement of the appropriateness of the proposed investigations and the NRC Staff's commitment to a cooperative and expeditious review of this program.
Based upon our discussions with your staff on July 21, 1982, we are proceeding with this program with the understanding that it will address their last remaining concern on our docket regarding geology.
Please advise us immediately if our understanding is incorrect.
It is our intent to work as closely as possible with your staff during these investigations and provide them all data as it becomes available. During the course of the core boring phase, a site visit by the NRC Staff, for the purpose of reviewing core logs and the core itself, will probably be necessary. The program outlined is estimated to take approximately eight weeks to complete and is envisioned to provide enough information so judgment by your staff can be made finalizing the Skagit/Hanford SER in the October 1982 time frame.
If you have any questions or require additional information, please call us immediately.
Very truly yours, Robert V. Myers Vice President Generation Resources R. Jackson NRC ec: DdhC Service List dated 8/5/82
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DATE August 5, 1982 SKACIT/HANFORD NUCLEAR PROJECT NRC Snrvica List Docket Nos. STN 50-522 and STN 50-523 COMMISSION NRC STAFF APPLICANTS (cont.)
Secretary of the Commission Richa rd L. Black, Esq.
Warren G. Hastings, Esq.
Docketing and Service Branch Counsel for the NRC Staf f Associate Corporate Counsel U.S. Nuclear Regulatory Commission U.S.
Nuclear Regulatory Commission Washington, D.C.
20555 Of fice of the Executive Legal Portland General Electric Company 121 S.W. Salmon Street Director Portland, OR 97204 LICENSING BOARD Washington, D.C.
20555 Richard D. Bach, Esc.
John F. Wolf, Esq., Chairman INTERESTED STATES AND COUNTIES Administrative Judge Stoel, Rives, Boley, Fraser & Wyse 2300 Georgia Paciflo Building Atomic Safety and Licensing Board Washington Energy Facility Site 900 S.W.
Fifth Avenue 3409 Shepherd Street Evaluation Council Portland, OR 97204 Chevy Chase, MD 20015 Nicholas D.
Lewis, Chairman Mail Stop PY-ll OTHER Dr. Frank F. Hooper Olympia, WA 98504 Administrative Judge Nina Bell, Staff Intervenor Atomic Safety and Licensing Board Kevin M.
Ryan, Esq.
Coalition for Safe Power School of Natural Resources Washington Assistant Attorney Suite 527, Governor Building University of Michigan General 408 S.W. Second Avenue Ann Arbor, M1 48190 Temple of Justice Portland, OR 97204 Olympia, WA 98504 Mr. Gustava A.
Linenberger Ralph Cavanagh, Esq.
Administrative Judge Frank W. Ost rander, Jr., Esq.
Natural Resources Defense Council Atomic Safety and Licensing Board Oregon Assistant Attorney General 25 Kearny Street U.S.
Nuclear Regulatory Commission 500 Pacific Building San Francisco, CA 94108 Washington, D.C.
20555 520 S.W. Yash111 Portland, OR 97204 APPEAL BOARD Terence L. Thatcher, Esq.
WWF and OSC Bill Sebero, Chairman 708 Dekun Building Alan S.
Rosenthal, Chairman Benton County Commissioner 519 S.W. Third Avenue Atomic Safety and Licensing P. O.
Box 470 Portland, OR 97204 Appeal Board Prosser, WA 99350 U.S.
Nuclear Regulatory Commission Mr. Robert C. Lothrop wa shing ton, D.C.
20555 APPLICANTS Attorney for Columbia River Inter-Tribal Fish Commission Dr. John H. Buck, Member F. Theodore Thomsen Suite 320 Atomic Safety and Licensing Perkins, Cole, Stone, 8383
. Sa" Appeal Board Olsen & Williams R
7 U.S. Nuclear Regulatory Commission 1900 Washington Building James B. Hovis Washington, D. C.
20555 Seattle, WA 98101 Yakima Indian Nation c/o Hovis, Cockrill & Roy Michael C. Farrar, Member David G.
Powell. Esq.
316 North Third Street Atomic Safety and Licensing Lowenstein, Newman, Reis & Axelrad P.O. Box 487 l
Appeal Board 1025 Connecticut Avenue N.W.
Yakima, WA 98907 l
U.S. Nuclear Regulatory Commission Washington, D.C.
20036 Washington, D.C.
20555 Canadian Consulate General James W. Durham, Esq.
Donald Martens, Consul l
Senior Vice President 412 Plaza 600 i
General Counsel and Secretary 6th and Stewart Street Portland General Electric Company Seattle, WA 98101 121 S.W. Salmon Street l
Portland, OR 97204 l
7-26-82 l
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