ML19296D738

Forwards Safety Evaluation Re Concrete Masonry Wall Design Criteria for Transverse Loadings & Rept on Design Criteria for Masonry Walls. Discussion Will Take Place During Wk of 800225

ML19296D738
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	02/22/1980
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Goodwin C PORTLAND GENERAL ELECTRIC CO.
Shared Package
ML19296D739	List: ML19296D738 ML19296D743 ML19296D746 ML19296D752
References
TAC-12369, NUDOCS 8003130093
Download: ML19296D738 (4)

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UNITED STATES

(,g NUCLEAR REGULATORY COMMISSION yg.. f g,\\"_

E WASHINGTON, D. C. 20555 d

w FEBRUARY g g g Docket No. 50-344 Mr. Charles Goodwin, Jr.

Assistant Vice President Portland General Electric Company 121 S.W. Salmon Street Portland, Oregon 97204

Dear Mr. Goodwin:

Enclosed for your information and use are two documents relating to the concrete masonry wall design criteria (the " wall problem") for Trojan Nuclear Plant:

1.

The NRC Staff Safety Evaluation Report, and 2.

" Report on Design Criteria for Masonry Walls in the Trojan Power Plant," by Dr. James Calville, NRC consultant on masonry.

The SER sets forth the basis for the Staff's concurrence that Trojan could resume operation following your filing of LER 79-15 and supple-mental material, and resulted in the letter to you of December 31, 1979 from Region V advising you of this conclusion. This conclusion is, however, conditioned on your completing a confirmatory block test program and further confirmation of mortar fill in double-block walls which have a calculated vertical shear stress in excess of 7.5 psi.

The confirmatory test program was first discussed with you at a meeting on December 6,1979, and agreed to in your letter of December 31, 1979, in which you stated your intention to meet with us shortly to develop an acceptable program.

We believe that the passage of time since this commitment was made makes such a meeting now overdue. You should expedite your efforts to proceed with the testing program.

Finally, since your acceptance criteria for masonry and composite walls (not only those supporting significant safety-related piping and equip-ment) has not yet been accepted by NRC, and because walls not supporting safety-related piping have not been shown to meet the criteria for the 0.159 OBE loading condition, we believe that the current 0.08g shutdown level should remain in place (irrespective of any resolution of the Control Building design deficiencies) until the results of the confirmatory testing have been evaluated and found acceptable by NRC.

800313 00G

Mr. Charles Goodwin, Jr.

FEBRUARY 2 2 000 Portland General Electric Company The second document 12 our masonry consultant's report assessing the design criteria for the masonry walls at Trojan.

In this report, Professor Colville raises several concerns regarding the design adequacy of the Trojan walls. This report is receiving expedited review in order to assess its safety significance for Trojan.

You are requested to do the same, and be prepared to discuss this report with us during the week of February 25.

Sincerel y,

'k(CVMS A. Schwencer, Chief Operating Reactors Branch #1 Division of Operating Reactors

Enclosures:

1.

Safety Evaluation Report 2.

Consul tant's Report cc: w/ enclosures See next page

Mr. Charles Goodwin, Jr.

Portland General Electric Conpany FEBRUARY ; 21980 cc: Mr. Ronald W. Johnson, Esquire Mr. John A. Kullberg Corporate Attorney Route One Portland General Electric Company Box 250Q 121 S.W. Salmon Street Sauvie Island, Oregon 97231 Portland, Oregon 97204 Maurice Axelrad, Esquire Robert M. Hunt, Chainnan Lowenstein, Newman, Reis, Board of County Conrnissioners Axelrad and Toll Columbia County Suite 1214 St. Helens, Oregon 97051 1025 Connecticut Avenue, N.W.

Washington, D. C.

20036 Columbia County Courthouse Law Library, Circuit Court Room Richard M. Sandvik, Esquire St. Helens, Oregon 97051 Frank W. Ostrander, Jr.

Counsel for Oregon Dept. of Director, Oregon Department of Energy Energy Labor and Industries Building, Room 111 500 Pacific Building Salem, Oregon 97310 520 S.W. Yamhill Portland, Oregon 97204 Dr. Hugh D. Paxton 1229 41st Street Mr. David B. McCoy Los Alamos, New Mexico 87544 348 Hussey Lane Grants Pass, Oregon 97526 Michael Malmros U. S. Nuclear Regulatory Conrnission William r.insey, Esquire Trojan Nuclear Plant 1002 N.E. Holladay P. O. Box 0 Portland, Oregon 97232 Rainier, Oregon 97048 Ms. Nina Bell Dr. Kenneth A. McCollom, Dean 728 S.E. 26th Street Division of Engineering, Portland, Oregon 97214 Architecture and Technology Oklahoma State University Mr. Eugene R. Rosolie Stillwater, Oklahoma 74074 Coalition for Safe Power 215 S.E. 9th Avenue Portland, Oregon 97214

4 Mr. Charles Goodwin, Jr.

FEBRUARY " 2 SSO Portland General Electric Company cc: Marshall E. Miller, Esquire, Chairman Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Atomic Safety and Licensing Board Panel V. S. Nuclear Regulatory Commission Washington, D. C.

20555 Docketing and Service Branch (7)

Office of the Secretary V. S. Nuclear Regulatory Commission Washington, D. C.

20555 Alan S. Rosenthal, Esquire Atomic Safety and Licensing Apppal Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Dr. John H. Buck Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Dr. W. Reed Johnson Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Atomic Safety and Licensing Appeal Panel (5)

U. S. Nuclear Regulatory Commission Washington, D. C.

20555

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