ML17355A142

Submittal of Revised Mitigating Strategies Assessment Report for Flooding

ML17355A142
Person / Time
Site:	Cooper
Issue date:	12/12/2017
From:	Dent J Nebraska Public Power District (NPPD)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML17355A110	List: ML17355A142 NLS2017092, Attachment 2:(Redacted) Mitigating Strategies Assessment for Flooding, Revision 1
References
NLS2017092
Download: ML17355A142 (2)

Text

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____ ___, Nebraska Public Power District Always there when you need us NLS2017092 December 12, 2017 U.S. Nuclear Regulatory Commission Attention:

Document Control Desk Washington, DC 20555

Reference:

Revised Mitigating Strategies Assessment Report for Flooding Cooper Nuclear Station, Docket No. 50-298, DPR-46 NPPD letter, "Mitigating Strategies Assessment Report for Flooding," dated April 27,2017

Dear Sir or Madam:

In the Reference, Nebraska Public Power District (NPPD) submitted the Mitigating Strategies Assessment (MSA) for the reevaluated flood hazard for Cooper Nuclear Station (CNS). As a result of an audit discussion with the Nuclear Regulatory Commission (NRC) on June 7, 2017, and further engineering analysis, NPPD determined that CNS' primary strategy for coping with a beyond-design-basis external flooding event would be modified.

NPPD informed the NRC of this decision during a teleconference on September 18, 2017. The purpose of this letter is to provide Revision 1 to CNS' MSA for Flooding (Attachment 1). The revisions made to the MSA are shown by revision bar in the right hand margin. NPPD requests Attachment 1, which contains security-related information, be withheld from public disclosure in accordance with 10 CFR 2.390. A redacted version of CNS' revised MSA is provided as Attachment 2 and is suitable for public disclosure.

There are no new regulatory commitments contained in this correspondence.

Should you have any questions or require additional information, please contact Jim Shaw, Licensing Manager, at (402) 825-2788.

ATTACHMENT 1 TO THIS LETTER CONTAINS SECURITY-RELATED INFORMATION.

UPON SEPARATION FROM ATTACHMENT 1, THIS COVER LETTER AND ATTACHMENT 2 ARE DECONTROLLED.

COOPER NUCLEAR STATION P.O. Box 98 / Brownville, NE 68321-0098 Telephone:

(402) 825-3811 / Fax: (402) 825-5211 www.nppd.com SECURITY-RELATED INFORMATION

-WITHHOLD UNDER 10 CFR 2.390 NLS2017092 Page 2 of2 I declare under penalty of perjury that the foregoing is true and correct. Executed on: /,J.,/;11..

/ ,:2.Pf 7 --~,,__-,,~~---

J hn Dent, Jr. ice President

-Nuclear and Chief Nuclear Officer /bk Attachments:

1. Mitigating Strategies Assessment for Flooding, Revision 1 Cooper Nuclear Station (Security-Related Information)

2. Mitigating Strategies Assessment for Flooding, Revision 1 -Cooper Nuclear Station (Redacted) cc: Regional Administrator, w/ attachments USNRC -Region IV Director, w/ attachments USNRC -Office of Nuclear Reactor Regulation Cooper Project Manager, w/ attachments USNRC -NRR Plant Licensing Branch IV Senior Resident Inspector, w/ attachments USNRC-CNS NPG Distribution,_w/o attachments CNS Records, w/ attachments ATTACHMENT 1 TO THIS LETTER CONTAINS SECURITY-RELATED INFORMATION.

UPON ~EPARATION FROM ATTACHMENT 1, THIS COVER LETTER AND ATTACHMENT 2 ARE DECONTROLLED.