WM 18-0039, Schedule for the Wolf Creek Nuclear Operating Corporation (WCNOC) Re-Analysis of the LBLOCA and SBLOCA Using the Full Spectrum LOCA (Fsloca) Methodology and the Performance and Analysis Design (PADS) Model, Amendment 213 License Condition

Schedule for the Wolf Creek Nuclear Operating Corporation (WCNOC) Re-Analysis of the LBLOCA and SBLOCA Using the Full Spectrum LOCA (Fsloca) Methodology and the Performance and Analysis Design (PADS) Model, Amendment 213 License Condition t

ML18191B125
Person / Time
Site:	Wolf Creek
Issue date:	07/03/2018
From:	Heflin A Wolf Creek
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
WM 18-0039
Download: ML18191B125 (4)

Text

w*LFCREEK -, NUCLEAR OPERATING CORPORATION Adam* C. Heflin President and Chief Executive Officer July 3, 2018 WM 18-0039 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

References:

1, Letter dated August 28, 2015 from C. F. Lyon, USNRC, to A. C. Heflin, WCNOC, "Wolf Creek Generating Station - Issuance of Amendment RE: Revise Technical Specification 5.6.5, Core Operating Limits Report (COLR), to Add ASTRUM to the list of Analytical Methods (TAC No. MF 3518)"

2. Letter dated January 8, 2018 from D. C. Morey, USNRC, to J. A.

Gresham, Westinghouse, "Verification Letter of the Approval Version of Westinghouse Electric Company Topical Report WCAP-16996-P/WCAP-16996-NP, Volumes I, II and Ill, Revision 1, 'Realistic Loss-of-Coolant Accident Evaluation Methodology Applied to the Full Spectrum of Break Sizes"' (Accession No. ML17352A018)

3. Letter dated January 8, 2018 from D. C. Morey, USNRC, to J.A.

Gresham, Westinghouse, "Verification Letter of the Approval Version of Westinghouse Electric Company Topical Report WCAP-17642-P/NP, Revision 1, 'Westinghouse Performance Analysis and Design Model (PADS)"' (Accession No. ML17338A453)

4. Letter dated March 20, 2018 from C. R. Hafenstine, WCNOC, to USNRC, "10 CFR 50.46 Annual Report of Emergency Core Cooling System (ECCS) Evaluation Model Changes"

Subject:

Docket No. 50-482: Schedule for the Wolf Creek Nuclear Operating Corporation (WCNOC) Re-Analysis of the LBLOCA and SBLOCA using the Full Spectrum LOCA (FSLOCA) Methodology and the Performance and Analysis Design (PADS) Model, Amendment 213 License Condition to Facility Operating License No. NPF-42 P.O. Box 411 / Burlington, KS 66839 / Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HC/VET

WM18-0039 Page 2 of 3 To Whom It May Concern:

The Nuclear Regulatory Commission (NRG) issued Amendment 213 to Wolf Creek Nuclear Operating Corporation (WCNOC) Facility Operating License (FOL) No. NPF-42 (Reference 1) in August of 2015. A License Condition was issued with the Amendment which provides for either of two options: to demonstrate that the current Loss-of-Coolant Accident (LOCA) safety analyses are conservatively bounded or to provide a schedule for an approved re-analysis. The purpose of this letter is to provide the latter, a schedule for licensing basis re-analyses of Peak Clad Temperature (PCT) as required by 10 CFR 50.46(b)(1).

Reference 2 is verification that the NRG found WCAP-16996-P/WCAP-16996-NP (Rev 1),

"Realistic Loss-of-Coolant Accident (LOCA) Evaluation Methodology Applied to the Full Spectrum Loss-of-Coolant Accident (FSLOCA) Methodology," acceptable for use in future licensing actions. Reference 3 is verification that the NRG found WCAP-17642-P-A/WCAP-17642-NP-A (Rev 1), "Westinghouse Performance Analysis and Design Model (PADS),"

acceptable for future licensing actions.

As documented in the Reference 4, significant margin exists between the PCT values calculated within the current Large Break and Small Break LOCA analyses of record (1890°F and 981°F, respectively) and the 10 CFR 50.46(b)(1) regulatory limit of 2200°F. As such, WCNOC has determined that an immediate re-analysis is not warranted and instead plans to address the re-analysis work within its long range planning, providing the results by June 30, 2027.

The Attachment to this letter contains a list of regulatory commitments. If you have any questions concerning this matter, please contact me at (620) 364-4000, or Cynthia R.

Hafenstine at (620) 364-4204.

Sincerely, (JJ-caf(L Adam C. Heflin ACH/rlt

Attachment:

List of Regulatory Commitments cc: K. M. Kennedy (NRG), w/a B. K. Singal (NRG), w/a N. H. Taylor (NRG), w/a Senior Resident Inspector (NRG), w/a

WM 18-0039 Page 3 of 3 STATE OF KANSAS )

) ss COUNTY OF COFFEY )

Adam C. Heflin of lawful age, being first duly sworn upon oath says that he is President and Chief Executive Officer of Wolf Creek Nuclear Operating Corporation; that he has read the foregoing document and knows the contents thereof; that he has executed the same for and on behalf of said Corporation with full power and authority to do so; and that the facts therein stated are true and correct to the best of his knowledge, information and belief.

SUBSCRIBED and sworn to before me this l'J <.')

r-.J day of -\J lA.

\ '-/ , 2018.

~ (\

Notary Pub!ic

• N~!~~~lic~~~!~~;n~as My Appt. Expires 7 'd).o 1. Expiration Date _ _ _ 7,...../_~.,..../~~0_L 8:~

I I

Attachment to WM 18-0039 Page 1 of 1 LIST OF REGULATORY COMMITMENTS The following table identifies those actions committed to by Wolf Creek Nuclear Operating Corporation (WCNOC) in this document. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments. Please direct questions regarding these commitments to Cynthia R. Hafenstine, Manager Nuclear and Regulatory Affairs at Wolf Creek Generating Station, (620) 364-4204.

REGULATORY COMMITMENT DUE DATE WCNOC will perform an approved re-analysis of Pea_k Cladding June 30, 2027 Temperature (PCT).