ML19323B878

Application to Amend License DPR-65 Adding Restriction on Max Enrichment of Any Fuel Assembly to Be Stored in Spent Fuel Storage Pool

ML19323B878
Person / Time
Site:	Millstone
Issue date:	05/09/1980
From:	Counsil W NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML19323B879	List: ML19323B878 ML19323B886
References
TAC-8947, NUDOCS 8005140374
Download: ML19323B878 (3)

Text

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May 9, 1980 Docket No. 50-336 Director of Nuclear Reactor Regu ation Attn: Mr. Robert A. Clark, Chief Operating Reactors Branch #3 U. S. Nuclear Regulatory Company Washington, D. C. 20555 Gentlemen:

Millstone Nuclear Power Station, Unit No. 2 Proposed Revisions to Technical Specifications Pursuant to 10CI:R50.9 ), Northeast Nuclear Energy Company (NNECO) hereby proposes to amend its operatied license, DFR-65, by incorporating the changes identified in Attachment 1 into the Millstone Unit No. 2 Technical Specifications.

The change proposes to add a restriction on the maximum enrichment of any fuel assembly to be stored in the spent fuel storage pool. It is noted that the specified enrichment of 3.35 w/o corresponds to a value of 39.24 gm/cm of U-235.

The proposed Technical Specifications are required to support the Cycle 4 refueling in that the new fuel to be stored in the spent fuel pool, and '

i ultimately placed in the Millstone Unit No. 2 core, is of a higher enrich-ment than previous fuel. A criticality analysis for the Millstone Unit No. 2 spent fuel storage pool has been performed using the conservative l criteria presented in Attachment 2. Maximum enrichment fuel assembly parameters and present spent fuel rack design have been assumed in this analysis.

The results of the analysis demonstrate that Keff for the Millstone Unit No. 2 spent fuel storage pocl will remain less than 0.95, including uncertainties, at a 95/95 probability / confidence level. This result is consistent with that recommended in ANSI N210-1976 and in "NRC Position for Review and Acceptance of Spent Fuel Storage and Handling Applications".

The above proposed changes have been reviewed pursuant to 10CFR50.59 and have not been found to constitute an unreviewed safety question. The basis for this conclusion is that the parameter of significance, Keff, is required

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t to remain less than'O.95, as was the case in the previous analysis. The l

maximum allowable enrichment of 3.35 w/o is only slightly higher than the maximum enrichment utilized prior to Cycle 4, that being 3.24 w/o. The actual Keff is considerably less than 0.95 for reasons including

a) No credit is taken for dissolved boron in the spent fuel pool; b) It is assumed that all fuel is unirradiated; t

c) Worst-case geometries / configurations were assumed.

The Millstone Unit No. 2 Nuclear Review Board has reviewed and approved the I above-proposed changes and concurred in the above determination.

f NNECO has reviewed the proposed license amendment pursuant to the requirements of 10CFR170 and has determined that this change constitutes a Class IV i License Amendment. This determination la based on the fact that this i

proposed Technical Specification change is the first submittal relating I

to the Cycle 4 core reload amendment. Therefore, please find enclosed the applicable Class IV License Amendment fee in the amount of twelve thousand three hundred dollars ($12,300). Additional requests for license amendments l on this subject will be forthcoming during the next several months, and will reference this letter regarding 10CFR170 and the associated fee require-ments such that no additional payments will be made concerning the Cycle 4 refueling effort.

The Cycle 4 reload fuel will be arriving onsite this month. To expedite the refueling operation schedule and maximize manpower availability, placement of the new fuel of higher enrichment into the spent fuel pool  ;

is necessitated. Therefore, NNECO respectfully requests an expedited review and issuance of the above-proposed changes by the NRC Staff.

Very truly yours, NORTHEdST NUCLEAR ENERGY COMPANY k) D ' &nw W. G. Counsil Vice President By: b D. C. Switzer Q President i

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STATE OF CONNECTICUT )

) ss. Berlin COUNTY OF HARTFORD ) f / NId Then personally appeared before me W. G. Counsil, who being duly sworn, did state that he is Vice President of Northeast Nuclear Energy Company, a Licensee herein, that he is suthorized to execute and file the foregoing information in the name and on behalf of the Licensees herein and that the statements contained in said information are true and correct to the best of his knowledge and belief.

J 0. I4h Notary Public /

My Commission Expires March 31, 1981 w