ML19282A785

Clarifies Review of Control Bldg Wall Sections Mentioned in .New Info Does Not Affect 780919 Suppl Structural Evaluation & Has No Impact on Licensees Analysis & Conclusions for Interim Operation

ML19282A785
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	03/02/1979
From:	Broehl D PORTLAND GENERAL ELECTRIC CO.
To:	Schwencer A Office of Nuclear Reactor Regulation
References
TAC-07551, TAC-11299, TAC-7551, NUDOCS 7903060491
Download: ML19282A785 (3)

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POllTLAND GENEllAL ELECTIIIC COMPANY l21 S.W SALMON STREET PoRTLAN D, OREGON 972O4 D. J, E ROEH L A n.wi A m r vic E ent s,r, e N T Fbrch 2, 1979 Trojan Nuclear Plant Docket 50-344 License NPF-1 Director of Nuclear Reactor Regulation ATTN:

Mr. A. Schwencer, Chief Operating Reactors Branch #1 Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C.

20555

Dear Sirs:

In a telephone call today with your Messrs. Trammell, Herring and Gray, clarification was requested concerning the review made of one of the Control Building wall sections which I mentioned in my February 28, 1979 letter to you.

Af ter developing information f rom the rebar cut sheets, we reviewed the analyses performed during preparation of the September 19, 1978 Supplemental Structural E va luat ion.

"In the supplemental analysis, just as in the previous analyses, the critical stories are those at el 45 ft to 77 ft.

Walls above el 77 ft have capacities at least equal to the capacities of the walls at el 45 f t to 77 ft, and the loads on these walls above el 77 f t are lower."

(Clarificati,n #27, Response to NRC Questions dated August 30, 1978). Thus, the capacities of the ma jor shear walls above 77 ft were established to be at least 150 psi.

Since their shear stresses were calculated to be less than 150 psi, the walls' capacities were not required to be investigated further. The new inf or mation does not affect the use of the minimum value of 150 psi.

Therefore, the new information does not in any way affect the September analyses for the Control Building walls and has no impact on the Licensee's analyses and conclusions for interim operation, and thus does not impact the analyses and conclusions of the NRC Staff nor any testimony or evidence relied on by the Licensing Board in their Partial Initial Decision. However, recognizing our continuing duty to keep the NRC and the Board informed of all matters relating to the Control Building walls, we considered it appropriate to supply such information to you.

Since re ly,

4, o 790306043[

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UNITED STATES OF AMERICA NUCLEAR REGULATORY CO:1 MISSION BEFORE THE ATOMIC SAFETY AND LICENSING E0ARD In the Matter of

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Docket 50-344 PORTLAND GENERAL ELECTRIC COMPANY,

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et al

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(Control Building Proceeding)

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(Trojan Nuclear Plant)

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CERTIFICATE OF SERVICE I hereby certify that on March 3, 1979, Licensee's letter to Director of Nuclear Reactor Regulation dated March 2, 1979 providing clarification t

letter of February 28, 1979 has been served upon the persons listed below by delivery to a courier service or by depositing copics thereof in the United States mail with proper postage affixed for first class mail.

Marshall E. Miller, Esq., Chairaan Joseph R. Gray, Esq.

Atomic Safety and Licensing Board Counsel for NRC Staff U. S. Nuclecr Regulctory Cennissicn U. S. Nuclear Regulatory Commiss ion Washington, D. C.

20555 Washington, D. C.

20555 Dr. Kenneth A. McCollca, Dean Lowenstein, Newman, Reis, Axelrad &

Division of Engineering, Toll Architecture and Technology 1925 Connecticut Avenue, N. W.

Ohlahoma State University Suite 1214 Stillwater, Oklahoma 74074 Washington, D. C.

20036 Dr. Hugh C. Paxton Atomic Safety and Licensing Appeal 1229 - 41st Street Panel Los Alamos, New Mexico 87544 U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Atomic Safety and Licensing Board Panel Docketing and Service Section (3)

U. S. Nuclear Regul atory Commi ss ion Of fice of the Secretary Washington, D. C.

20555 U. S. Nuclear Regulatory Commission Washington, D. C.

20555

CERTIFICATE OF SERVICE John II. Socolofsky, Esq.

Mr. John A. Kullberg Assistant Attorney General Route 1, Box 250Q Of Attorneys for the State of Oregon Sauvie Island, Oregon 97231 100 State Of f ice Building Salem, Oregon 97310 Mr. David B. McCoy 348 Hussey Lane Robert M. Johnson, Esq.

Grants Pass, Oregon 97526 Assistant Attorney General Of Attorneys for the State of Oregon Ms. C. Gail Parson 100 State Office Building P. O. Box 2992 Salem, Oregon 97310 Kodiak, Alaska 99615 William Kinsey, Esq.

Mr. Eugene Rosolie Bonneville Power Administration Coalition for Safe Power P. O. Box 3621 215 S. E. 9th Avenue Portland, Oregor. 97208 Portland, Oregon 97214 Ms. Nina Bell Mr. Stephen M. Willingham 728 S. E. 26th Avenue 555 N. Tomahawk Drive Portland, Oregon 97214 Portland, Oregon 97217 Columbia Environmental Council Columbia County Courthouse P. v. Bax 611 Law Library St. Helens, Oregon 97051 Circuit Court Room St. Helens, Oregon 97051 it/

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Ronald W. Jafdson Corporate A(torney Portland General Electric Company

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Dated:

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