ML19329A230

Forwards Request for Addl Info Based on Util Responses to NRC 751103 & 760319 Questions

ML19329A230
Person / Time
Site:	Oconee
Issue date:	06/21/1976
From:	Eisenhut D Office of Nuclear Reactor Regulation
To:	Goller K Office of Nuclear Reactor Regulation
References
NUDOCS 7912300282
Download: ML19329A230 (2)

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K. R. Coller, Assistant Director

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for Operating Reactors Division of Operating Reactors OCONEE UNITS 1, 2 AND 3 - SPENT TUEL CASK HANDLING TECHNICAL ASSISTANCE REQUEST NO. ORB 1-1327 Oconee Units 1, 2 and 3 - Spent Fusl Cask Handling Plant Name:

Licensing Stage:

Duke Responses to Questions dated 3/19/76 and Post OL Document Reviewed:

1/3/75 Docket Nos.: 50-26 50-270 and 50-287 ORB-1, C. Zech

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ranch and Project Manager:

Responsible OR 7/1/76 Requested Completion Date:First Round Questions Description of Response: Awaiting Information Review Status:

d In response to your request the Engineering Branch has reviewe h

as of the information in the reference cited above intt e areAdequate responses to the structural and mechanical engineering.

l te questione herewith attached are required before we can comp e our review.

C, : : = ~'. ! ~ ~ ' by Darroh u.L.c.ceut D. G. Eisenhut, Assistant Director for Operational Technology Division of Operating Reactors I

I As s cted Fnclosure:

DISTRIBUTION:

V. Stello, DOR Docket'.N5s'. 50-269 cc:

A. Schwencer, DDR 50-270 L. Shao, DOR 50-287 24 V. Benaroya, DSS NRR-Rdg

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DIVISION OT Opr. RATING' REACTORS

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-0CONEE UNITS 1, 2 AND 3 50-269, 50-270, AND 50-237

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REQUEST FOR ADDITIONAL INFOkMATION t

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f the Describe the mathematical model used for the analysis o

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storage racks.

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Provide an analysis for the case where the cask tips and one-d 2.

end impacts on a few cells affecting the minimum edge-to-e ge distance between fuel assemblies before the other en Tabulate the highest stresses, contact with the fuel storage cells.

d identify the lowest stress margins, the createst deformations an

.the locations where cach occur.

for Provide' a summary 'of the stress analyr ts which was performed d block on the 3.

.the uniform drop of the cask, yoke and loa h item

. Tabulate the results as. required in t e fuel storage cc11s.

above.

4.

Describe the critical drop accident for the cash, yoke and load Justify l block which may occur during spent fuel handling.

b your response using the-dynamics of the drop and state the num Tabulate the results - required in of cells which are affected.

item 2.

5.-. Discuss the behavior of the assemblics which are locat i

and outside the boundary of the dropped cack during both the uniform and concentrated cask drop.

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