ML062720292

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Summary of September 21, 2006, Category 1 Meeting with Nuclear Management Company, LLC (Nmc), to Discuss Extension of Completion Time for Emergency Diesel Generators
ML062720292
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 10/20/2006
From: Mahesh Chawla
NRC/NRR/ADRO/DORL/LPLIII-1
To:
Office of Nuclear Reactor Regulation
M. Chawla LPL3-1
References
TAC MC9001, TAC MC9002
Download: ML062720292 (6)


Text

October 20, 2006LICENSEE: Nuclear Management Company, LLC (NMC)

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

SUBJECT:

SUMMARY

OF SEPTEMBER 21, 2006, CATEGORY 1 MEETING WITH NUCLEAR MANAGEMENT COMPANY, LLC (NMC) , TO DISCUSS EXTENSION OF COMPLETION TIME FOR EMERGENCY DIESEL

GENERATORS (TAC NOS. MC9001 AND MC9002)

On September 21, 2006, a public meeting was held between the U.S. Nuclear Regulatory Commission (NRC), and representatives of Nu clear Management Company, LLC (NMC), at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, MD. The purpose

of the meeting was to discuss extension of completion time for Emergency Diesel Generators (EDG) at Prairie Island Nuclear Generating Plant (PINGP), Unit 1 and 2. There have been

previous discussions with the licensee regarding load capabilities of the EDGs. The licensee

wanted to present information which could demonstrate that any one of the EDGs on Unit 1 side

can bring both the units to a cold shutdown and maintain it there for an indefinite period of time.

The licensee presented information on the various loads which the EDGs would be subjected to during Loss of Offsite Power (LOOP) and Station Blackout (SBO) events. The licensee

presented handouts which contained the list of loads for the EDGs and electrical schematics for

its onsite distribution system.

At the beginning of the meeting, the NRC staff informed the licensee that at present the electrical branch is in the process of writing a white paper to address the issue of extension of

EDG outages to 14 days. The branch expects to generate a Regulatory Information Summary

which will provide the NRC staff bases for the EDG extensions. The meeting started with NMC

providing the brief description of the License Amendment Request (LAR) and progressed with

the electrical layouts and load distributions. The licensee also provided a brief explanation of

how the cross tie functions work between the two units.

The NRC staff queried the licensee about several issues, specifically to the electrical loads on the EDGs. There was discussion on the loads which are transferable from one unit to the other, and NRC staff asked the licensee to identify those loads for the staff review. The NRC staff

informed the licensee that they have preference to see an extra A/C source brought to the site

during an EDG outage extending to 14 days. The basis for this recommendation is to ensure

defense-in-depth, specially after the blackout event which occurred in 2003. There was also

discussion on the capability of EDGs D3 and D4 which are non-safety related, to be used as an

extra A/C source. The licensee expressed their difficulties in the use of D3 and D4, but stated

that they will evaluate it further. Following ac tion items were taken by the licensee to evaluate and provide further response: 1. Identify the transferable loads.

2. Identify those time periods during the year when the Prairie Island preferred power source (i.e., the grid) is highly stressed.
3. Identify any corrective actions associated with addressing the D5 and D6 reliability issue that are still open.
4. Assess D3 and D4 to be used as extra A/C sources during EDG outages.

Members of the public were not in attendance. Public Meeting Feedback forms were provided but not taken by any of the participants.

A list of meeting attendees is enclosed. Also enclosed is a copy of the licensee's slides

presented at the meeting [ADAMS Accession No. ML062560441].

Please direct any inquiries to Mahesh Chawla at 301-415-8371, or mlc@nrc.gov.

/RA/ Mahesh L. Chawla, Project Manager

Plant Licensing Branch III-1

Division of Operating Reactor Licensing

Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306

Enclosures:

1. List of Attendees
2. Licensee Handouts cc w/encls: See next page

ML062560441].

Please direct any inquiries to Mahesh Chawla at 301-415-8371, or mlc@nrc.gov.

/RA/ Mahesh L. Chawla, Project Manager

Plant Licensing Branch III-1

Division of Operating Reactor Licensing

Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306

Enclosures:

1. List of Attendees
2. Licensee Handouts cc w/encls: See next page DISTRIBUTION
PUBLICRidsNrrDorl (CHaney/CHolden/TMcGinty)

LPL3-1R/FRidsNrrPMMChawla RidsNrrDorlLple (MMurphy)RidsNrrLATHarris RidsNrrPMMJaffeRidsAcrsAcnwMailCenter RidsOgcMailCenterLMrowca (NRR/ADRA/DRA/APL)

TMensha (NRR/PMAS)OHopkins (NRR/ADRA/DRA/APL)

SLaur (NRR/ADRA/DRA/APL)RClark (NRR/ADRO/DIRS/ITSB)

GWilson (NRR/ADES/DE/EEEB)PHearn(NRR/ADRO/DIRS/ITSB)

RidsRgn3MailCenter (GGrant)PHabighorst, RIII OChopra (NRR/ADES/DE/EEEB)KCorp (NRR/ADES/DE/EEEB)

RJasinski, NRRTBloomer, RIII

DWeaver ADAMS Accession Number:

ML062720292 OFFICENRR/LPL3-1/PMNRR/LPL3-1/LANRR/EEA/BCNRR/LPL3-1/BC (A)

NAME MChawla: caTHarrisGWilsonMMurphyDATE10/10/0610/10/0610/11/0610/20/06

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

Jonathan Rogoff, Esquire Vice President, Counsel & Secretary

Nuclear Management Company, LLC

700 First Street

Hudson, WI 54016 Manager, Regulatory Affairs Prairie Island Nuclear Generating Plant

Nuclear Management Company, LLC

1717 Wakonade Drive East

Welch, MN 55089 Manager - Environmental Protection Division Minnesota Attorney General's Office

445 Minnesota St., Suite 900

St. Paul, MN 55101-2127 U.S. Nuclear Regulatory Commission Resident Inspector's Office

1719 Wakonade Drive East

Welch, MN 55089-9642 Regional Administrator, Region III 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 Tribal Council Prairie Island Indian Community

ATTN: Environmental Department

5636 Sturgeon Lake Road

Welch, MN 55089 Nuclear Asset ManagerXcel Energy, Inc.

414 Nicollet Mall, R.S. 8

Minneapolis, MN 55401 Michael B. Sellman President and Chief Executive Officer

Nuclear Management Company, LLC

700 First Street

Hudson, MI 54016 Craig G. Anderson Senior Vice President, Group Operations

Nuclear Management Company, LLC

700 First Street

Hudson, WI 54016 Mr. Thomas J. Palmisano Site Vice President

Prairie Island Nuclear Generating Plant

Nuclear Management Company, LLC

1717 Wakonade Drive East

Welch, MN 55089 November 2005 ENCLOSURE List of AttendeesNuclear Regulatory Commission Mahesh Chawla - Project Manager - NRR/DORL Technical Reviewers:

Steven Laur - NRR/DRA Ogbonna Hopkins - NRR/DRA

Pete Hearn - NRR/DIPM

Om Chopra - NRR/DE/EEEB

George Wilson - NRR/DE/EEEB

Kimberly Corp - NRR/DE/EEEB Nuclear Management Company Gabe Salamon - Fleet Licensing Manager Dale Vincent - Licensing Engineer

Tom Lillehei - Electrical Design Engineer

Tim Allen - Manager of Fleet Operation