ML20236X001

Provides follow-up to Meeting Re Use of Natural or Depleted U in Storage Casks/Use of Neutron Absorbing Matls,In Order to Improve Basis & Shed Light on Direct Final Possibility

ML20236X001
Person / Time
Site:	Prairie Island, Fort Saint Vrain
Issue date:	09/12/1996
From:	Persinko A NRC
To:	Au M, Jensen E NRC
Shared Package
ML20236W816	List: ML20236W813 ML20236W975 ML20236X001 ML20236X013 ML20236X026 ML20236X033 ML20236X046 ML20236X051 ML20236X056 ML20236X060 ML20236X070 ML20236X074 ML20236X081 ML20236X088 ML20236X164 ML20236X172 ML20236X178 ML20236X179 ML20236X184 ML20236X187 ML20236X378 ML20236X387 ML20236X391 ML20236X393 ML20236X400 ML20236X402 ML20236X408 ML20236X410 ML20236X411 ML20236X448 ML20236X461 ML20236X476 ML20236X495 ML20236X500 ML20236X505 ML20236X514 ML20236X544 ML20236X556 ML20236X559 ML20236X570 ML20236X571 ML20236X581 ML20236X592 ML20236X603 ML20236X609 ML20236X613 ML20236X616 ML20236X628 ML20236X634 ML20236X652 ... further results
References
FRN-63FR31364, RULE-PR-72 AF80-1-003, AF80-1-3, NUDOCS 9808070044
Download: ML20236X001 (1)

Text

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'PbR M 96-/

Froes Andrew Persinko ,

To:

Date TWD2.TWP9.MLA, WNP2.ENJ 9/12/96 8:04am

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subjects Use of natural or depleted U in storage casks /use of neutron absorbing materials As a follow-up to our meeting, the following is provided to improvo our basis  !

and to shed light on direct final possibility:

1. Prairie Island uses Boral (borated aluminum) in the basket of their TN-40 cask as a neutron absorber. They were issued an exemption to Part 72 .124-(b) which requires monitoring to assure continued efficacy. The SER written by the staff to support tha exemption permitted this with the justification that "there is no credible way to lose the boral in the basket in this casks therefere, there is no need to verify the continued efficacy of the neutron absorbing material, as required by 10 CFR 72.124(b)." There were no compensating measure required (such as increased concentration od boron). I am trying to get some addional info --- i.e. do we need compensating measures as we discussed.

l l

2. Ft St Vrain stores and periodically uses depleted U shield plugs in their ISFSI. They do not have an exemption to Part 40. They are permitted to store /use depleted U per their license which explicitly states that they are permitted 3 depleted U shielding components of transfer casks. The legal basis for allowing this is that the depleted U was considered "other radioactive material related to the receipt, storage, and transfer of fuel elements" and thus allowed by Part 72 in the Part 72 definition of ISFSI.

cc EXE, TWD2.TWF9.RCA, FIY, SFS

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9008070044 990004 POR PR 72 63FR31364 wcw ,,w PDR

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