ML19336A680
| ML19336A680 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 10/03/1980 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 8010300460 | |
| Download: ML19336A680 (4) | |
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UNITED STATES f,
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October 3, 1980 t
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Docket No. 50-344 Mr. Charles Goodwin, Jr.
Assistant Vice President Fortland General Electric Company 121 S.W. Salmon Street Portland, Oregon 97204
Dear Mr. Goodwin:
In conducting our review of the recent volcanic activity at Mount St.
Helens in relation to the Trojan Nuclear Plant, we have determine 1 that we will need the additional information identified in the enclosure to continue our review.
In order for us to maintain our review schedule, your response is requested within 45 days of your receipt of this letter.
Please contact us if you have any questions concerning this request.
Sincerely, f)
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Cm Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
Request for Additional Information cc: w/ enclosure See next page 1
8 010sonL Gn
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.s Mr. Charles Goodwin, Jr.
Portland General Electric Company cc:
Mr. J. W. Durhars Esquire Donald W. Godard, Supervisor Vice Presidant and Corporate Counsel Siting and Regulation Portland General Electric Company Oregon Department of Erergy 121 S.W. Salmon Street Labor and Industries Building Portland, Oregon 97204 Room 111 Salem, Oregon 97310 Columbia County Courthouse Law Library, Circuit Court Room
'St. Helens, Oregon 97501 Michael Malmros, Resident Inspector U. S. Nuclear Regulatory Commission Trojan Nuclear Plant P. O. Box 0 Rainier, Oregon 97045 Robert M. Hunt, Chairman Board of County Commissioners Columbia Codnty
,St. Helens, Oregon 97051 Director, Technical Assessment Division Office of Radiation Programs (AW-459)
U. S. Environmental Protection Agency Crystal Mall #2 i
Arlington, Virginia 20460 U. S. Environmental Protection Agency Region X Office ATTN:
EIS COORDINATOR 1200 6th Avenue Seattle, Washington 98101
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R quest for Additional Information i
Trojan Nuclear Plant i-Fortland General Electric Company i
Docket No. 50-344 i
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1.
Since Mount'St. Helens volcanism nay continue for an indefinite period of i
tir.e. issues related to the a.ailability of long tern cooling su; plies should be docu ented.
In question 361.2 you were requested to discuss I.
the effects on Trojan of an eruption occurring on the west-southaest i
flank of Mount St. Helens. ST:;e phenonena potentially ir.; acting the plant h
include tephra, air blast, pyroclastic flo.s, nud ficws, and debris flow.
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f Coincident with these phenomena, and assuning that the plant is at full
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operation at the tiue of the initiating events discussed below, please l
identify the nethods of obtaining cooling water to shut the plant down and h
o raiott n it in a s',td..n cendition.
Include both the initial 30-day i
i periods, requested by Regulatory Guide 1.27 " Ultimate Heat Sinks for i
i Nuclear Power Plants," and for extended periods of time in excess of i
30-days, i
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a.
Assume the loss of all water from the Columbia River due to blockage i
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of the intake by sediment disposition.
i b.
Loss of use of the cooling tower except for the basin.
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c.
A combination of events 1 and 2.
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d.
Loss of offsite power coincident with Items 1, 2 and 3.
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2.
Describe the actions being taken, or that have been taken subsequent to the May 18, 1980 Mount St. Helens eruption, to protect safety '
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related equipment, systems and components from suspended sediment in the Columbia River water withdrawn for plant use.
Include dis-cussions of maintenance schedules for equipment which can be or have been adversely affected by suspended sediment in the water from the Columbia River.
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