NLS2007056, Revised Page from Holtec International Non-Proprietary Report

Revised Page from Holtec International Non-Proprietary Report

ML072120350
Person / Time
Site:	Cooper
Issue date:	07/26/2007
From:	Vanderkamp D Nebraska Public Power District (NPPD)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NLS2007056
Download: ML072120350 (5)

Text

H Nebraska Public Power District Ahivays there when you need us NLS2007056 July 26, 2007 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001

Subject:

Revised Page from Holtec International Non-Proprietary Report Cooper Nuclear Station, Docket No. 50-298, DPR-46

Reference:

Letter from Stewart B. Minahan, Nebraska Public Power District, to U.S. Nuclear Regulatory Commission, dated October 17, 2006,

Subject:

License Amendment Request to Revise Technical Specification - Onsite Spent Fuel Storage Expansion

Dear Sir or Madam:

The purpose of this letter is to provide to the Nuclear Regulatory Commission (NRC) a revised page from a non-proprietary version of a report by Holtec hIternational (HI). By letter dated October 17, 2006 (Reference), the Nebraska Public Power District (NPPD) submitted a license amendment request (LAR) to revise Cooper Nuclear Station (CNS) Teclmical Specification (TS) 4.3.3 to increase the capacity of the spent fuel storage pool. HI report HI-2043224, entitled "Licensing Report on the Wet Fuel Storage Capacity Expansion at Cooper Nuclear Station," was submitted to the NRC as part of that LAR.

The NRC Project Manager for CNS requested justification for designating as proprietary the discussion of the computer code LS-DYNA in Section 7.5 of the proprietary version of the HI report mentioned above. This request was coordinated with HI. In response, HI concunred with the NRC that this information had previously been made public, and therefore could not be designated as proprietary. HI has revised Section 7.5 of the proprietary and non-proprietary versions of the report. Enclosed is page 7-5 from the non-proprietary version of the report with the revised Section 7.5.

Should you have any questions regarding this matter, please contact me at (402) 825-2904.

Sincerely, David Van Der Kamp Acting Licensing Manager COOPER NUCLEAR STATION00 P.O Box 98 / Brownville, NE 68327-0098 Telephone: (402) 825-3811 / Fax: (402) 825-5211 www.nppd.com 1,

NLS2007056 Page 2 of 2

/IT Enclosure cc: Regional Administrator w/ Enclosure USNRC Region IV Cooper Project Manager w/ Enclosure USNRC - NRR Project Directorate IV-I Senior Resident Inspector w/ Enclosure USNRC - CNS Nebraska Health and Human Service w/ Enclosure Department of Regulation and Licensure NPG Distribution w/o Enclosure CNS Records w/ Enclosure

NLS2007056 Enclosure Page 1 of 2 Enclosure Revised Page 7-5 fiomn Holtec International report HI-2043224 (Non-proprietary)

"Licensing Report on the Wet Fuel Storage Capacity Expansion at Cooper Nuclear Station"

7.5 Mathematical Model In the first step of the solution process, the velocity of the dropped fuel assembly is computed for the condition of underwater free fall in the manner of the formulation presented in the above section. Table 7.5.1 contains the computed velocities for the various drop events. Note that fluid drag was conservatively neglected when calculating the impact velocities used in the finite element model.

In the second step of the solution, an elasto-plastic finite element model for each drop event is prepared with the Holtec QA validated computer code LS-DYNA .. .. ........................

S. .. ... .....

.... --:7 . ...* ..... -- -- -5..'....... .. ....

To maximize the damage of the rack, the dropped fuel assembly, which includes the additional weight of the handling tool, is assumed to be rigid in all analyses.

. The physical properties of material types undergoing deformation in the postulated impact events are summarized in Table 7.5.2.

Holtec Report HI-2043224 7-5 Project No: 1406 SHADED AREAS DENOTE PROPRIETARY INFORMATION

ATTACHMENT 3 LIST OF REGULATORY COMMITMENTS© 0 ATTACHMENT 3 LIST OF REGULATORY COMMITMENTS',-!

Correspondence Number: NLS2007056 The following table identifies those actions committed to by Nebraska Public Power District (NPPD) in this document. Any other actions discussed in the submittal represent intended or planned actions by NPPD. They are described for information only and are not regulatory commitments. Please notify the Licensing Manager at Cooper Nuclear Station of any questions regarding this document or any associated regulatory commitments.

COMMITMENT COMMITTED DATE COMMITMENT NUMBER OR OUTAGE None i +

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