ML20128C341

Submits Technical Assistance Request ORB-2-210 to Review Util 760122 Resubmittal of Analyses Based on Use of Smaller NFS-4,two-element Cask

ML20128C341
Person / Time
Site:	Monticello
Issue date:	02/05/1976
From:	Ziemann D Office of Nuclear Reactor Regulation
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 9212040352
Download: ML20128C341 (2)

Text

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Darrell C. Eisenhut, Assistant Director for ryerational Technology,-DOR' l

TEC!NICAL ASSISTANCE REQUEST NO. ORB-2-210 l

Plant Namet Hon ec110.

Docket No:

.-263 -

Branch CodeP'TCD-2 Project Manaccr:

R. Snaider (27403)

Operational Technology Branches:

Engineering tranch and Plant Systems Branch i

Requested Conpletion Date: February-27, 1976 DESCRIPTION OF REQUEST: The Northern States Power Conpany (NSP) previously sulnitted data concerning the use of large spent fuel shipping casks for the renoval of spent - fuel from the Monticello Nucicar Generating Plant.

Analysis has shown that tho 70 ton General Electric Conpany IP-300.

shipping cast could not be used due to structural considerations.

1 hy Ictter dated January 22, 1976, NSP resulnitted their analyses based -

upon the use of a sr. aller (25 ton) NFS-4 2-clement cask. Their evaluation includes:

i 1.

Reactor Building Structural Capability 2.

Cast 'landling Systens Design Integrity b

3.

Protection-of Spent Fuel and. Vital Systems i

4.

kininistrative Control of Cask Handling Operationsi

~

t RU"iCSTED ACTIM:

EcView the enclosure.in detail, with special c phasis-

- given to verification of _ the safety factors derived therein, assuring

-conservative assumptions have been nado in each case.

Provius. ;mur evaluation of the acceptability of using the NTS-4 2-cicacnt cask at Monticello, over the proposed restricted cash novenont path, bearing in l

- ind the statement-of the licensee, in Enclosure 1, that: "The crane n

systen is not designed to be sidgic falittre proof and nay be subjected

[

to either single randon r.cchanical-or control systea failures."

-9212040352 760205

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Should the proposal be deemed unacceptable, it is requested.that questions or conments be provided as soon as possible.

NSP plans to ship fuct in.

late spring or early sunner of 1976.

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M alsiinetBF-Dennis 1. Zkmann 3'

I Dennis L. :lemann, Chief Operating Reactors' Branch #2 j

Division of Operating Peactors -

Enclosure:

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NSP Ictter dtd. 1/22/76~

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Stello j-L. C. Sino-1 l

A. Schwencer

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K. R. Coller T. J. Carter.

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R. P. Snaider l

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