RA-19-0189, Supplement to Response for Request for Additional Information Regarding License Amendment Request Proposing Changes to the Technical Specifications 3.8.1

Supplement to Response for Request for Additional Information Regarding License Amendment Request Proposing Changes to the Technical Specifications 3.8.1

ML19099A046
Person / Time
Site:	Mcguire, Catawba, McGuire
Issue date:	04/08/2019
From:	Snider S Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RA-19-0189
Download: ML19099A046 (8)

Text

Steve Snider 526 S. Church Street Charlotte, NC 28202 Mailing Address:

EC07H / P.O. Box 1006 Charlotte, NC 28202 980.373.6195 Steve.Snider@duke-energy.com Serial: RA-19-0189 10 CFR 50.90 April 8, 2019 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 CATAWBA NUCLEAR STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-413 AND 50-414 RENEWED LICENSE NOS. NPF-35 AND NPF-52 MCGUIRE NUCLEAR STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-369 AND 50-370 RENEWED LICENSE NOS. NPF-9 AND NPF-17

SUBJECT:

SUPPLEMENT TO REQUEST FOR ADDITIONAL INFORMATION (RAI)

RESPONSES REGARDING LICENSE AMENDMENT REQUEST PROPOSING CHANGES TO THE TECHNICAL SPECIFICATIONS 3.8.1 FOR CATAWBA NUCLEAR STATION AND MCGUIRE NUCLEAR STATION

REFERENCES:

1. Duke Energy letter, Response to NRC Request for Additional Information (RAI)

Regarding License Amendment Request Proposing Changes to the Technical Specification 3.8.1 For McGuire Nuclear Station, dated December 3, 2018 (ADAMS Accession No. ML18337A277).

2. Duke Energy letter, Response to NRC Request for Additional Information (RAI)

Regarding License Amendment Request Proposing Changes to the Technical Specifications 3.8.1 For Catawba Nuclear Station, Units 1 and 2, dated March 7, 2019 (ADAMS Accession No. ML19066A354).

Ladies and Gentlemen:

In References 1 and 2, Duke Energy Carolinas, LLC (Duke Energy) submitted responses to the NRC Request for Additional Information (RAI) regarding the License Amendment Request (LAR) proposing changes to the Technical Specifications (TS) 3.8.1 for Catawba Nuclear Station (CNS), Units 1 and 2 and McGuire Nuclear Station (MNS), Units 1 and 2. The NRC requests supplemental information regarding Reference 1, RAI-3 response for MNS and Reference 2, RAI-17 response for CNS. This letter provides figures from a Duke Energy analysis that evaluate the amount of time available for restoring offsite power during a Station Blackout (SBO) event. The calculations performed utilize the RELAP5/MOD3.1DUKE computer code.

( ~ DUKE ENERGY

U.S. Nuclear Regulatory Commission RA-19-0189 provides a Figure for MNS, Units 1 and 2. Attachment 2 provides two figures applicable to CNS. Figure 7 is applicable to CNS, Unit 1 and Figure C-7 is applicable to CNS, Unit 2. These figures represent the time available for SBO recovery actions.

The conclusions of the original No Significant Hazards Consideration and Environmental Consideration in the original LAR are unaffected by this RAI clarification.

This document contains no new regulatory commitments.

In accordance with 10 CFR 50.91, Duke Energy is notifying the states of North Carolina and South Carolina of this LAR by transmitting a copy of this letter and attachments to the designated state official. Should you have any questions concerning this letter, or require additional information, please contact Art Zaremba, Director - Nuclear Fleet Licensing, at 980-373-2062.

I declar~ un~~r penalty of perjury that the foregoing is true and correct. Executed on lip1t.1 f s, 2-011 Sincerely, Steve Snider Vice President, Nuclear Engineering NOE Attachments:

1. McGuire Supplemental Information Regarding Reference 1, RAl-3 Response

2. Catawba Supplemental Information Regarding Reference 2, RAl-17 Response

U.S. Nuclear Regulatory Commission RA-19-0189 cc:

(all with Attachments unless otherwise noted)

C. Haney, Regional Administrator USNRC Region II J.D. Austin, USNRC Senior Resident Inspector M. Mahoney, NRR Project Manager L. Garner, Manager, SCDHEC

U.S. Nuclear Regulatory Commission RA-19-0189 McGuire Supplemental Information Regarding Reference 1, RAI-3 Response

U.S. Nuclear Regulatory Commission RA-19-0189, Attachment 1 McGuire RELAP5 Analyses SBO SensttMty - Case 1 14 -

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9000 10800

U.S. Nuclear Regulatory Commission RA-19-0189 Catawba Supplemental Information Regarding Reference 2, RAI-17 Response

U.S. Nuclear Regulatory Commission RA-19-0189, Attachment 2 Catawba Un it 1 :

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S0000 Figure7 MNS and CNS-1 Units Case 1 Result RSG ELAP at 3479 MWt With RCP Seal Leak Top of Active Core 100000 Time (seconds) 150000 200000

U.S. Nuclear Regulatory Commission RA-19-0189, Attachment 2 Catawba Unit 2:

Figure C-7 CNSUoit2 Case C-1 Result D5 ELAP at 34 79 MWt With RCP Seal Leak 45.------------,----------r---------....------------,

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