ML19338C269

Forwards Request for Addl Geologic Info Resulting from Mount St Helens Volcanic Explosion

ML19338C269
Person / Time
Site:	Satsop
Issue date:	07/31/1980
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Renberger D WASHINGTON PUBLIC POWER SUPPLY SYSTEM
References
NUDOCS 8008140327
Download: ML19338C269 (3)

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UNITED STATES y,?,

NUCLEAR REGULATORY COMMISSION 3

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JUL 311980 Docket Nos. : STil 50-508 and STil 50-509 Mr. D. L. Renberger, Assistant Director, Technology Washington Public Power Supply System P. O. Box 968 Richland, Washington 99352

SUBJECT:

WASHIflGTON PUBLIC POWER SUPPLY SYSTEM HUCLEAR PROJECTS NOS. 3 AND 5 - REQUEST OF GE0 LOGIC INFORMATION AS A RESULT OF MOUNT ST HELENS As a result of the recent Mount St. Helens unusual events, we are requesting additional geologic information affecting your Washington Public Power Supply System Nuclear Pro.jects Nos. 3 and 5.

The specific information required is listed in the Enclosure.

Please inform us of the date when this requested information will be available.

Please contr. '. us if you desire any discussion or clarification of the information requested.

Sincerely, Robert L. Tedesco, Assistant Director for Licensing Division of Licensing cc: See next page 4

18008140327

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Mr. N. O. Strand

anaging Director Washington Public'Pcacr Supply Systen P. O. Box 968 3000 George Washington Way

,Richland, Washington 99352 cc:

Nicholas S. Reynolds, Esq.

DeBevoise /,liberman 1200 Seventeenth St., N. W.

Washington, D. C.

20036 Richard Q. Quigley, Esq.

Washington Public Pcwcr Supply System 3000 George Washington Wai Richland, Washington 99352 Nicholas D. Lewis, Chairman Energy Facility Site Evaluation Council 820 East Fifth Avenue Olympia, Washington 98504 Resident inspector /WPPSS NPS c/o V. S. NRC P. O. Box 69 Richland, 'o'ashington 99352 Mr. Kenneth W. Cook Washington Public Pcwer Sucply System P. O. Box 1223 Eine, Washington 98541 f

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JUL 311990 ENCLOSURE REQUEST FOR INFORMATION WASHINGTQR PUBLIC POWER SUPPLY' SYSTEM NUCLEAR PROJECT N05. 3 AND 5 00CKET NOS. STN 50-508 AND STN 50-509 360.0 Geosciences Branch 3 61.1 Recent (1980) Mount St. Helens volcanism has resulted in three major ash falls (May 18, May 25, and June l?) as well as several smaller intermediate emissions.

Describe (if applicable), the effect (including ash thickness ranges) of each of the above larger events, as well as any smaller ash fall on the WPPSS 3 and 5 site.

3 61.2 Based upon information obtained directly by the Washington Public Power Supply System (WPPSS) or as reported by others, provide a i

map of the area within at least a 50 mile radius of the WPPSS 3 and 5 units, showing the distribution and cumulative thickness of ashfall resulting from the recent Mount St. Helens volcanism.

Provide (if applicable) separate maps depicting the ash distribution and thickness of the May 18, May 25, and June 12 events within the same 50 mile radius.

3 61.3 Describe the effect, including thickness, duration of fallout, and elapsed time between eruption and ashfall at the site of each of the main ash fall events (or any intermediate site-affected events) at the WPPSS 3 and 5 site.

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