ML071070027

Review Complete, Response to GL 2006-02, Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power.

ML071070027
Person / Time
Site:	Monticello, Point Beach, Prairie Island
Issue date:	04/24/2007
From:	Tam P NRC/NRR/ADRO/DORL/LPLIII-1
To:	Weinkam E Nuclear Management Co
Tam P
References
GL-06-002, TAC MD1001, TAC MD1018, TAC MD1019, TAC MD1020, TAC MD1021
Download: ML071070027 (6)

Text

April 24, 2007 Mr. Edward J. Weinkam, Director Nuclear Licensing and Regulatory Services Nuclear Management Company, LLC 700 First Street Hudson, WI 54016

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT, POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2, AND PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 - RESPONSE TO GENERIC LETTER (GL) 2006-02, GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER (TAC NOS. MD1001, MD1018, MD1019, MD1020, AND MD1021)

Dear Mr. Weinkam:

On February 1, 2006, the U.S. Nuclear Regulatory Commission (NRC) issued GL 2006-02 (Accession No. ML060180352) to all holders of operating licenses for nuclear power reactors except those which have permanently ceased operation and have certified that fuel has been removed from the reactor vessel. GL 2006-02 notified licensees of the NRC staffs need for information in four areas as follows:

(1) Use of protocols between the nuclear power plant (NPP) and the transmission system operator (TSO), independent system operator (ISO), or reliability coordinator/authority (RC/RA) and the use of transmission load flow analysis tools (analysis tools) by TSOs to assist NPPs in monitoring grid conditions to determine the operability of offsite power systems under plant technical specifications. [The TSO, ISO, or RA/RC is responsible for preserving the reliability of the local transmission system; in GL 2006-02, the term TSO is used to denote these entities];

(2) Use of NPP/TSO protocols and analysis tools by TSOs to assist NPPs in monitoring grid conditions for consideration in maintenance risk assessments; (3) Offsite power restoration procedures in accordance with Section 2 of NRC Regulatory Guide (RG) 1.155, Station Blackout; and (4) Loss of offsite power caused by grid failures at a frequency equal to or greater than once in 20 site-years in accordance with RG 1.155.

Subsequent to issuance of GL 2006-02, the NRC issued a Request For Additional Information (RAI) (Accession No. ML063380308) regarding the resolution of GL 2006-02 to 63 of 65 holders of operating licenses for nuclear power reactors. The RAI requested licensees respond to questions in the following areas:

(a) Switchyard minimum voltage; (b) Loss of real-time contingency analysis (RTCA) capability;

E. Weinkam (c) Verification of RTCA predicted post-trip voltage; (d) Identification of applicable single contingencies; (e) Seasonal variation in grid stress (reliability and loss-of-offsite power probability);

(f) Interface with transmission system operator during extended plant maintenance.

By letters dated April 3, 2006 (Accession No. ML060940042), July 21, 2006 (Accession No. ML062050349) and January 31, 2007 (two letters, Accession Nos. ML070310573 and ML070310576) you responded to GL 2006-02 and the subsequent RAI. Based on the information you provided, the NRC staff concluded that the subject nuclear plants have maintained compliance with NRC regulatory requirements governing electric power sources and associated personnel training. Accordingly, the NRC staff considers your response to GL 2006-02 complete for the subject nuclear plants.

If you have any questions, please contact me 301-415-1451.

Sincerely,

/RA/

Peter S. Tam, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-263, 50-266, 50-301, 50-282, and 50-306 cc: See next page

E. Weinkam (c) Verification of RTCA predicted post-trip voltage; (d) Identification of applicable single contingencies; (e) Seasonal variation in grid stress (reliability and loss-of-offsite power probability);

(f) Interface with transmission system operator during extended plant maintenance.

By letters dated April 3, 2006 (Accession No. ML060940042), July 21, 2006 (Accession No. ML062050349) and January 31, 2007 (two letters, Accession Nos. ML070310573 and ML070310576) you responded to GL 2006-02 and the subsequent RAI. Based on the information you provided, the NRC staff concluded that the subject nuclear plants have maintained compliance with NRC regulatory requirements governing electric power sources and associated personnel training. Accordingly, the NRC staff considers your response to GL 2006-02 complete for the subject nuclear plants.

If you have any questions, please contact me 301-415-1451.

Sincerely,

/RA/

Peter S. Tam, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-263, 50-266, 50-301, 50-282, and 50-306 cc: See next page DISTRIBUTION PUBLIC LPL3-1 r/f RidsNrrDorlLpl3-1 RidsNrrPMPTam RidsNrrLATHarris RidsAcrsAcnwMailCenter RidsNrrDirsltsb RidsOgcRp RidsRgn3MailCenter RidsNrrDorlDpr JRobinson PMilano MChawla Accession No.: ML071070027 OFFICE LPL3-1/PM LPL3-1/LA LPL3-1/PM LPL3-1/PM EEEB/BC LPL3-1/BC NAME PTam THarris PTam for PMilano GWilson LRaghavan MChawla DATE 4/19/07 4/18/07 4/19/07 4/23/07 4/23/07 4/24/07 OFFICIAL RECORD COPY

Monticello Nuclear Generating Plant cc:

Jonathan Rogoff, Esquire Commissioner Vice President, Counsel & Secretary Minnesota Department of Commerce Nuclear Management Company, LLC 85 7th Place East, Suite 500 700 First Street St. Paul, MN 55101-2198 Hudson, WI 54016 Manager - Environmental Protection Division U.S. Nuclear Regulatory Commission Minnesota Attorney Generals Office Resident Inspector's Office 445 Minnesota St., Suite 900 2807 W. County Road 75 St. Paul, MN 55101-2127 Monticello, MN 55362 Michael B. Sellman Manager, Nuclear Safety Assessment President and Chief Executive Officer Monticello Nuclear Generating Plant Nuclear Management Company, LLC Nuclear Management Company, LLC 700 First Street 2807 West County Road 75 Hudson, MI 54016 Monticello, MN 55362-9637 Nuclear Asset Manager Commissioner Xcel Energy, Inc.

Minnesota Pollution Control Agency 414 Nicollet Mall, R.S. 8 520 Lafayette Road Minneapolis, MN 55401 St. Paul, MN 55155-4194 Mr. John T. Conway Regional Administrator, Region III Site Vice President U.S. Nuclear Regulatory Commission Monticello Nuclear Generating Plant Suite 210 Nuclear Management Company, LLC 2443 Warrenville Road 2807 West County Road 75 Lisle, IL 60532-4351 Monticello, MN 55362-9637 Commissioner Minnesota Department of Health 717 Delaware Street, S. E.

Minneapolis, MN 55440 Douglas M. Gruber, Auditor/Treasurer Wright County Government Center 10 NW Second Street Buffalo, MN 55313 November 2005

Point Beach Nuclear Plant, Units 1 and 2 cc:

Jonathan Rogoff, Esquire Mr. Jeffery Kitsembel Vice President, Counsel & Secretary Electric Division Nuclear Management Company, LLC Public Service Commission of Wisconsin 700 First Street P.O. Box 7854 Hudson, WI 54016 Madison, WI 53707-7854 Mr. F. D. Kuester Nuclear Asset Manager President & Chief Executive Officer Wisconsin Electric Power Company WE Generation 231 West Michigan Street 231 West Michigan Street Milwaukee, WI 53201 Milwaukee, WI 53201 Michael B. Sellman Regulatory Affairs Manager President and Chief Executive Officer Point Beach Nuclear Plant Nuclear Management Company, LLC Nuclear Management Company, LLC 700 First Street 6610 Nuclear Road Hudson, MI 54016 Two Rivers, WI 54241 Douglas E. Cooper Mr. Ken Duveneck Senior Vice President & Chief Nuclear Town Chairman Officer Town of Two Creeks Nuclear Management Company, LLC 13017 State Highway 42 700 First Street Mishicot, WI 54228 Hudson, WI 54016 Chairman Site Director of Operations Public Service Commission Nuclear Management Company, LLC of Wisconsin 6610 Nuclear Road P.O. Box 7854 Two Rivers, WI 54241 Madison, WI 53707-7854 Dennis L. Koehl Regional Administrator, Region III Site Vice-President U.S. Nuclear Regulatory Commission Point Beach Nuclear Plant Suite 210 Nuclear Management Company, LLC 2443 Warrenville Road 6610 Nuclear Road Lisle, IL 60532-4351 Two Rivers, WI 54241 Resident Inspector's Office U.S. Nuclear Regulatory Commission 6612 Nuclear Road Two Rivers, WI 54241 November 2005

Prairie Island Nuclear Generating Plant, Units 1 and 2 cc:

Jonathan Rogoff, Esquire Tribal Council Vice President, Counsel & Secretary Prairie Island Indian Community Nuclear Management Company, LLC ATTN: Environmental Department 700 First Street 5636 Sturgeon Lake Road Hudson, WI 54016 Welch, MN 55089 Manager, Regulatory Affairs Nuclear Asset Manager Prairie Island Nuclear Generating Plant Xcel Energy, Inc.

Nuclear Management Company, LLC 414 Nicollet Mall, R.S. 8 1717 Wakonade Drive East Minneapolis, MN 55401 Welch, MN 55089 Michael B. Sellman Manager - Environmental Protection Division President and Chief Executive Officer Minnesota Attorney Generals Office Nuclear Management Company, LLC 445 Minnesota St., Suite 900 700 First Street St. Paul, MN 55101-2127 Hudson, MI 54016 U.S. Nuclear Regulatory Commission Mr. Thomas J. Palmisano Resident Inspector's Office Site Vice President 1719 Wakonade Drive East Prairie Island Nuclear Generating Plant Welch, MN 55089-9642 Nuclear Management Company, LLC 1717 Wakonade Drive East Regional Administrator, Region III Welch, MN 55089 U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Administrator Goodhue County Courthouse Box 408 Red Wing, MN 55066-0408 Commissioner Minnesota Department of Commerce 85 7th Place East, Suite 500 St. Paul, MN 55101-2198 July 2006