ML052310013

Request for Additional Information for the Review of the Monticello Nuclear Generating Plant License Renewal Application

ML052310013
Person / Time
Site:	Monticello
Issue date:	08/18/2005
From:	Daniel Merzke NRC/NRR/DRIP/RLEP
To:	Conway J Nuclear Management Co
Merzke, D., NRR/DRIP/RLEP, 415-3777
References
TAC MC6440
Download: ML052310013 (7)

Text

August 18, 2005 Mr. John T. Conway Site Vice President Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE MONTICELLO NUCLEAR GENERATING PLANT LICENSE RENEWAL APPLICATION (TAC NO. MC6440)

Dear Mr. Conway:

By letter dated March 16, 2005, Nuclear Management Company, LLC, (NMC or the applicant) submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54 (10 CFR Part 54) to renew the operating license for Monticello Nuclear Generating Plant (MNGP), for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The NRC staff is reviewing the information contained in the license renewal application (LRA) and has identified, in the enclosure, areas where additional information is needed to complete the review.

These questions were discussed with your staff, Mr. Patrick Burke, and a mutually agreeable date for this response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3777 or e-mail DXM2@nrc.gov.

Sincerely,

/RA/

Daniel J. Merzke, Project Manager License Renewal Section A License Renewal and Environmental Impacts Program Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket No. 50-263

Enclosure:

As stated cc w/encl: See next page

August 18, 2005 Mr. John T. Conway Site Vice President Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE MONTICELLO NUCLEAR GENERATING PLANT LICENSE RENEWAL APPLICATION (TAC NO. MC6440)

Dear Mr. Conway:

By letter dated March 16, 2005, Nuclear Management Company, LLC, (NMC or the applicant) submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54 (10 CFR Part 54) to renew the operating license for Monticello Nuclear Generating Plant (MNGP), for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The NRC staff is reviewing the information contained in the license renewal application (LRA) and has identified, in the enclosure, areas where additional information is needed to complete the review.

These questions were discussed with your staff, Mr. Patrick Burke, and a mutually agreeable date for this response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3777 or e-mail DXM2@nrc.gov.

Sincerely,

/RA/

Daniel J. Merzke, Project Manager License Renewal Section A License Renewal and Environmental Impacts Program Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket No.: 50-263

Enclosure:

As stated cc w/encl: See next page DISTRIBUTION: See next page ADAMS Accession no.:ML052310013 Document Name: E:\\Filenet\\ML052310013.wpd OFFICE PM:RLEP LA:RLEP SC:RLEP NAME DMerzke MJenkins SLee (J. Eads for)

DATE 08/ 16 /05 08/ 16 /05 08/ 18 /05 OFFICIAL RECORD COPY

Monticello Nuclear Generating Plant cc:

Jonathan Rogoff, Esquire Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 U.S. Nuclear Regulatory Commission Resident Inspector's Office 2807 W. County Road 75 Monticello, MN 55362 Manager, Regulatory Affairs Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637 Robert Nelson, President Minnesota Environmental Control Citizens Association (MECCA) 1051 South McKnight Road St. Paul, MN 55119 Commissioner Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 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 Commissioner Minnesota Department of Commerce 85 7th Place East, Suite 500 St. Paul, MN 55101-2198 Manager - Environmental Protection Division Minnesota Attorney Generals Office 445 Minnesota St., Suite 900 St. Paul, MN 55101-2127 John Paul Cowan Executive Vice President & Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Nuclear Asset Manager Xcel Energy, Inc.

414 Nicollet Mall, R.S. 8 Minneapolis, MN 55401 Mr. James Ross Nuclear Energy Institute 1776 I Street, NW, Suite 400 Washington, DC 20006-3708 Patrick Burke License Renewal Project Manager Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637 Mr. Douglas F. Johnson Director, Plant Life Cycle Issues Nuclear Management Company, LLC 700 First Street Hudson, WI 54016

DISTRIBUTION: Ltr to J. Conway, re: RAI for Monticello, Dated: August 18, 2005 ADAMS Accession No.: ML052310013 HARD COPY RLEP RF E-MAIL:

RidsNrrDrip RidsNrrDe G. Bagchi K. Manoly W. Bateman J. Calvo R. Jenkins J. Fair RidsNrrDssa RidsNrrDipm D. Thatcher R. Pettis G. Galletti C. Li K. Winsberg (RidsOgcMailCenter)

R. Weisman M. Mayfield A. Murphy S. Smith (srs3)

S. Duraiswamy Y. L. (Renee) Li RLEP Staff L. Raghavan L. Padovan A. Stone, RIII B. Burgess, RIII P. Lougheed, RIII R. Orlikowski, RIII T. Mensah OPA

Enclosure MONTICELLO NUCLEAR GENERATING PLANT LICENSE RENEWAL APPLICATION (LRA)

REQUEST FOR ADDITIONAL INFORMATION (RAI) 2.5 Electrical and Instrumentation and Controls RAI 2.5.1-1 In Section 2.5.1.1 of the LRA, under the system function listing of 480V Station Auxiliary, it is stated that Motor Control Centers (MCCs) 132, 133A, and 142A are credited as supporting an Anticipated Transient Without Scram (ATWS) event. However, according to license renewal drawing LR-36298, MCC 132 is not included in the scope of license renewal. Please resolve the discrepancy.

RAI 2.5.1-2 In Section 2.5.1.6 of the LRA, under the description of DC Battery, it is stated that the 24 Vdc batteries provide power for the nuclear instrumentation, process radiation monitors, and H2/O2 analyzer isolation valve position indication. Further, under the system function listing, it is stated that the 24 Vdc system continuously provides DC electrical power to the safety-related and nonsafety-related loads. However, the 24 Vdc system is not considered safety-related since the system is not required to provide the safety-related function of these loads. Please provide specific safety loads which are powered by 24 Vdc, and provide an explanation how these loads will perform the safety-related function in case the 24 Vdc non-safety power supply fails.

RAI 2.5.2-1 In Section 2.5.2.4 of the LRA, under the description of Offsite Power/SBO Recovery Path, it is stated that the path boundary includes the 345 KV, 115 kV and 13.8 kV system components from the plant 4.16 kV buses out to the first switchyard breaker, which disconnects the plant from the 345 kV or 115 kV ring bus or the 13.8 kV system fed from the #10 transformer in the switchyard. Please confirm that the path boundary also includes the associated control circuits within the scope of aging management review.

3.5 Aging Management of Containments, Structures, and Component Supports RAI 3.5.2.1.15-1 Section 3.3.2.2.10 of the license renewal application (LRA) mentions a Boral Coupon Surveillance Program but does not provide details of that program. The staff requests the applicant confirm that the Boral coupon surveillance program will continue to monitor degradation into the period of extended operation and to discuss the schedule for coupon removal and testing during this period to demonstrate continued Boral performance.

RAI 3.5.2.1.15-2 Section 10.2.1.2 of the Monticello USAR identifies bulging and binding concerns in 8 storage slots. The staff requests the applicant discuss the cause of the bulging and to describe the analysis that was performed to conclude that the bulging is not a degradation mechanism requiring management nor a concern in the remaining storage slots.

RAI 3.5.2.1.15-3 By letter dated April 14, 1978, the staff approved the use of Boral for use at Monticello. This approval indicates that Boral has been in service at Monticello for over 20 years. The staff requests the applicant provide the installation date of the Boral currently in the spent fuel pool.

In addition, to demonstrate that Boral integrity has been maintained, the staff requests the applicant to provide the test results for the coupons, including areal density measurements.

RAI 3.5.2.1.15-4 Section 3.3.2.2.10 of the LRA indicates that loss of material, cracking, and reduction of neutron absorbing capacity of Boral will be managed by the Plant Chemistry Program and the One-Time Inspection (OTI). The staff requests the applicant discuss how plant specific and industry-wide operating experience support the management of Boral through an OTI. In addition, the staff requests additional information related to the OTI described in Section B2.1.23 of the LRA for managing Boral. Specifically, the staff requests the applicant discuss the properties of Boral to be detected and trended and the acceptance criteria applied to Boral by the OTI.