ML17033A045

Summary of the Audit to Support the Review of the Monticello Nuclear Generating Plant License Amendment Request to Extended the Integrated Leak Rate Test Frequency

ML17033A045
Person / Time
Site:	Monticello
Issue date:	02/09/2017
From:	Robert Kuntz Plant Licensing Branch III
To:	Gardner P Northern States Power Company, Minnesota
Kuntz R, NRR/DORL/LPLIII,
References
CAC MF7359
Download: ML17033A045 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 February 9, 2017 Mr. Peter A. Gardner Site Vice President Monticello Nuclear Generating Plant Northern States Power Company - Minnesota (NSPM) 2807 West County Road 75 Monticello, MN 55362-9637

SUBJECT:

MONTICELLO NUCELAR GENERATING PLANT -

SUMMARY

OF THE AUDIT TO SUPPORT THE REVIEW OF THE MONTICELLO NUCLEAR GENERATING PLANT LICENSE AMENDMENT REQUEST TO EXTEND THE INTEGRATED LEAK RATE TEST FREQUENCY (CAC NO. MF7359)

Dear Mr. Gardner:

By letter to the U.S. Nuclear Regulatory Commission (NRC) dated February 10, 2016, Northern States Power Company doing business as Xcel Energy Inc. (Xcel) submitted a license amendment request (LAR) to revise technical specification 5.5.11 to provide a permanent extension of the integrated leakage rate test frequency from 10 to 15 years for the Monticello Nuclear Generating Plant.

To enhance the NRC staff's review of the request, the NRC staff conducted a regulatory audit on October 13 and 14, 2016, related to the probabilistic risk assessment portion of the LAR.

The staff reviewed documents and held discussions with members of Xcel and its contractor, Jensen Hughes. The regulatory audit summary is enclosed.

While the NRC review team did not identify any significant issues during its audit or during the discussions with Xcel and its contractor, the team indicated that the review was ongoing.

If you have any questions, please contact me at (301) 415-3733.

J

~ 1 (unt , enior Project Manager Plant censing ranch Ill Div.is.on of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-263

Enclosure:

Regulatory Audit Summary cc w/encl: Distribution via ListServ

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 REGULATORY AUDIT

SUMMARY

RELATED TO LICENSE AMENDMENT REQUEST REGARDING THE INTEGRATED LEAK RATE TEST FREQUENCY NORTHERN STATES POWER COMPANY MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 Date of Audit: October 13-14, 2016 Audit Location: Bethesda North Marriott Hotel & Conference Center 5701 Marinelli Rd, North Bethesda, MD 20852 NRC Audit Team Members:

Robert Kuntz, Project Manager Dan O'Neal, Technical Reviewer Mihaela Biro, Technical Reviewer Martin Stutzke, Technical Reviewer Anders Gilbertson, Technical Reviewer FENOC and Contractor

Participants:

Katherine Brandtjen, Northern States Power Corporation doing business as Xcel Energy Inc. (Xcel)

Rick Loeffler, Xcel Timothy Wellumson, Xcel John Fields, Xcel Steve Hammer, Xcel Rick Zyduck, Xcel Matthew Johnson, Jensen Hughes Rick Anoba, Jensen Hughes Documents Audited:

Presentation slides on Containment Accident Pressure NEDC-33347P Enclosure

Summary of Audit Activities:

The licensee provided a slide presentation overview and technical presentation on containment accident pressure (CAP) for MNGP, and the basis for the CAP approach taken in the license amendment request (LAR). The NRC discussed its assessment of MNGP CAP-related risk using a Semi-Markov model approach described in an NRC report (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12234A561 ). The licensee's CAP risk assessment given in the LAR and CAP related key uncertainties and assumptions, were also covered.

Request for Additional Information:

The audit of the documents resulted in the formation of requests for additional informational (RAls). Subsequent to the audit, the NRC staff issued an RAI based on its review of the LAR and the regulatory audit. The NRC staff's RAI was issued on November 18, 2016 (ADAMS Accession No. ML16323A242).

ML17033A045 *via email/memo dated OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DSS/APLA/BC* NRR/DORL/LPL3/BC NRR/DORL/LPL3/PM NAME RKuntz SRohrer SRosenberg DWrona RKuntz DATE 2/2/17 2/2/17 2/3/17 2/8/17 2/9/17