ML19274E593
| ML19274E593 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 03/03/1979 |
| From: | Rachel Johnson PORTLAND GENERAL ELECTRIC CO. |
| To: | Mccollom K, Mark Miller, Paxton H AFFILIATION NOT ASSIGNED, Atomic Safety and Licensing Board Panel, OKLAHOMA STATE UNIV., STILLWATER, OK |
| References | |
| NUDOCS 7904090231 | |
| Download: ML19274E593 (3) | |
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LEb March 3, 1979 RELATED CORRESPONDENCE Marshall E. Miller, Esq., Chairman Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. Kenneth A. McCollom, Dean 4
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Attached to this letter is a list of Requests for Design Changes (RDCs) which supplements previous lists. The items on this list will not affect the load carrying capability of any cajor shear wall.
The Licensee will continue to keep the Board informed of all activities at Trojan which may be construed as being related to the Trojan Control Building.
Sincerely, 4f 0
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Ronald W. Johnson Corporate Attorney Portland General Electric Company RWJ/LWE/4kkTICBB29 Attachment c:
R.11. Engelken Nuclear Regulatory Commission Region V A. Schwence r Nuclear Regulatory Commission T904 09 o
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.,c ATTACHMENT Following is the list of Requests for Design Change (RDC) work items for which field work may be performed within the next few weeks.
The relationship of the work with the Control, Auxiliary, and Fuel Building structures is briefly summarized below:
RDC No.
Modifir.ation Relationship 76-560, Addition of dampers at This modification involves the addi-DCP 17 fire walls, tion or replacement of fire dampers and DCP 23 at various locations in the Control, Auxiliary, and Fuel Building Complex.
No new penetrations are required.
Installation of some of the dampers will include attachment of small closer angles and/or duct supports to walls, Sb I I"*
which are in some cases shear walls.
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New fasteners will range in size from o,
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1-inch long for the closure angles to 4
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3/8-inch diameter by approximately 4
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3-inches long for the duct supports.
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Per unit installation, weights range e/
from less than 20-lbs. to about 200 lbo.
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will be about 3,000 lbs.
Electrical conduit and boxes will be relocated as required.
Installation of the fire dampers will not reduce the capacity of the shear walls to resist the required seismic loads.76-560, Replacement of fire Panel C43 at elevation 93 ft. of the DCP 12 system annunciator Control Building will be replaced.
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addition, 45 ft of conduit, a new pull box, and a new slab penetration will be installed.
No new penetrations of, or attachments to, shear walls are required.
The total weight added will be less than 100 lbs.
At tachmer.t Ma r*ch 3, 1979 Page Two RDC No.
Modifiention Relationship 77 079, Addition of door alarms.
Doors in the Control, Auxiliary and Fuel DCP 30 Building Complex will be provided with alarms.
Electrical boxes and conduit will in some cases be attached to shear walls, typically by 3/8-in. diameter, approximately 3-in. long concrete inserts.
Maximum weight added to any wall is on the order of 600 lbs.
The total weight added in the Complex will be less than 5,000 lbs.
No new penetrations of shear walls are required.
Installation of the door alarms will not reduce the capacity of the shear walls to resist the required seismic loads.77-079, Modification to an HVAC An existing air grill will be blocked off DCP 31 sy stem and about 15 ft. of small duct and a new grill will be added at elevation 93 ft.
in the Control Building. No new attach-ments to or penetrations of shear walls are required. The total weight addition will be less than 100 lbs.77-079, Addition of base radio New base radio antennas will be 'added DCP 11
- antennas, at elevation 93 ft. in the Fuel Building, at elevation 25 ft. in the Auxiliary Building, and at elevation 77 ft. in the Control Building. Electrical boxes and conduit with cable will interconnect the antennas with the base radio.
Three new 4-inch diameter slab penetrations and two wall (not shear walls) penetrations, 4-inch and 7-inch diameter, are required.
No penetrations of or attachments to shear walls are involved. The total weight addi-tion in the Complex is less than 3,000 lbs.
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PORTLAND OENEIML ELEcTitic Co3n m tal S W. SALMON STREET PORTLAND ORE 3ON 9720 5 D. J. BRO EH L sesisrant vice emes or=r March 2, 1979 Trojan Nuclear Plant
+F Docket 50-344
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Mr. A. Schwencer, Chief a
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Dear Sirs:
In a telephone call today with your Messrs. Tratnell, Herring and Gray, clarification was requested concerning the review cade of one of the Control Building wall sections which I centioned 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 S tructural Evaluation.
"In the supplenental analysis, just as in the previous analyses, the critical storiec 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 ft to 77 ft, and the loads on these walls above el 77 ft are lower."
(Clarification !/27, Response to NRC Questions dated August 30, 1978).
Thus, the capacities of the major shear walls above 77 f t 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 inforcation 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 inpact on the Licensee's analyses and conclusions for interin operation, and thus does not impact the analyses and conclusions of the NRC Staf f 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.
Sincerely, i
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UNITED STATES OF AMERICA
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In the Matter of
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Docket 50-344
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PORTLAND GENERAL ELECTRIC COMPANY,
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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 dated March 3, 1979 with an attached list of Requests for Design Change has been served upon the persons listed below by depositing copies thereof in the United States mail with proper postage affixed for first class mail.
Marshall E. Miller, Esq., Chairman Joseph R. Gray, Esq.
Atomic Safety and Licensing Board Counsel for NRC Staff U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Washington, D. C.
20555 Dr. Kenneth A. McCollom, Dean Lowenstein, Newman, keis, Axelrad &
Division of Engineering, Toll Architecture and Technology 1025 Connecticut Avenue, N. W.
Oklahoma State University Suite 1214 Stillwater, Oklahoma 74074 Washington, D. C.
20036 Dr. Hugh C. Paxton John H.'Socolofsky, Esq.
1229 - 41st Street Acsistant Attorney General Los Alamos, New Mexico 87544 Of Attorneys for the State of Oregon 100 State Office Building Atomic Safety and Licensing Board Salem, Oregon 97310 Panel U. S. Nuclear Regulatory Commission Robert M. Johnson, Esq.
Washington, D. C.
20555 Assistant Attorney General Of Attorneys for the State of Oregon Atomic Safety and Licensing Appeal 100 State Office Building Panel Salem, Oregon 97310 U. S. Nuclear Regulatory Commission Washington, D. C.
20555 William Kinsey, Esq.
Bonneville Power Administration Docketing and Service Section P. O. Box 3621 Office of the Secretary Portland, Oregon 97208 U. S. Nuclear Regulatory Commission Washington, D. C.
20555
CERTIFICATE OF SERVICE Ms. Nina Bell Mr. Eugene Rosolie 728 S. E. 26th Avenue Coalition for Safe Power Portland, Oregon 97214 215 S. E. 9th Avenue Portland, Oregon 97214 Columbia Environmental Council P. O. Box 611 Mr. Stephen M. Willingham St. Helens, Oregon 97051 555 N. Tomahawk Drive Portland, Oregon 97217 Mr. John A. Kullberg Route 1, Box 250Q Columbia County Courthouse Sauvie Island, Oregon 97231 Law Library Circuit Court Room Mr. David B. McCoy St. Helens, Oregon 97051 348 Hussey Lane Grants Pass, Oregon 97526 Ms. C. Gail Parson P. O. Box 2992 Kodiak, Alaska 99615 f
Ronald W.
'nson Corporate e ttorney Portland General Electric Company Dated:
March 3,1979