IR 05000263/2011002

Errata to Monticello Nuclear Generating Plant - NRC Integrated And Power Uprate Review Inspection Report 05000263-11-002

ML12052A187
Person / Time
Site:	Monticello
Issue date:	02/21/2012
From:	Riemer K R NRC/RGN-III/DRP/B2
To:	O'Connor T J Northern States Power Co
References
ML111300561 IR-11-002
Download: ML12052A187 (5)

Text

February 21, 2012

Mr. Timothy Site Vice President Monticello Nuclear Generating Plant Northern States Power Company, Minnesota 2807 West County Road 75 Monticello, MN 55362-9637

SUBJECT: ERRATA TO MONTICELLO NUCLEAR GENERATING PLANT NRC INTEGRATED AND POWER UPRATE REVIEW INSPECTION REPORT 05000263/2011002

Dear Mr. O'Connor:

On May 10, 2011, the U.S. Nuclear Regulatory Commission (NRC) issued Integrated Inspection Report 05000263/2011002 (ML111300561). The inspection report did not include documentation for an inspection sample that was completed under inspection procedure 71111.01, "Adverse Weather Protection." Please replace Section 1R01 of the May 10, 2011, report with Section1R01 which is enclosed.

We apologize for any inconvenience to you and your staff. In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter, its enclosure, and your response (if any) will be available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of NRC's Agencywide Document Access and Management System (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,/RA/

Kenneth Riemer, Branch Chief Branch 2 Division of Reactor Projects Docket No. 50-263 License No. DPR-22

Enclosure:

Errata to Integrated Inspection Report 05000263/2011002 cc w/encl: Distribution via ListServ 1 Enclosure ERRATA TO INTEGRATED INSPECTION REPORT 05000263/2011002 1R01 Adverse Weather Protection (71111.01) .1 Winter Seasonal Readiness Preparations a. Inspection Scope The inspectors conducted a review of the licensee's preparations for winter conditions to verify that the plant's design features and implementation of procedures were sufficient to protect mitigating systems from the effects of adverse weather. Documentation for selected risk-significant systems was reviewed to ensure that these systems would remain functional when challenged by inclement weather. During the inspection, the inspectors focused on plant-specific design features and the licensee's procedures used to mitigate or respond to adverse weather conditions. The inspectors walked down the emergency generator building and the station heating boiler system because their safety-related functions could be affected or required as a result of the extreme cold conditions that were forecasted for late January in southern Minnesota. Additionally, the inspectors reviewed the Updated Final Safety Analysis Report (UFSAR) and performance requirements for systems selected for inspection, and verified that operator actions were appropriate as specified by plant specific procedures. Cold weather protection, such as heat tracing and area heaters, was verified to be in operation where applicable. The inspectors also reviewed corrective action program (CAP) items to verify that the licensee was identifying adverse weather issues at an appropriate threshold and entering them into their CAP in accordance with station corrective action procedures. Specific documents reviewed during this inspection are listed in the Attachment to this report. The inspectors' reviews focused specifically on the following plant systems due to their risk significance or susceptibility to cold weather issues: This inspection constituted one winter seasonal readiness preparations sample as defined in Inspection Procedure (IP) 71111.01-05. b. Findings No findings were identified. .2 External Flooding a. Inspection Scope The inspectors evaluated the design, material condition, and procedures for coping with the design basis probable maximum flood. The evaluation included a review to check for deviations from the descriptions provided in the Updated Safety Analysis Report (USAR) for features intended to mitigate the potential for flooding from external factors.

As part of this evaluation, the inspectors checked for obstructions that could prevent draining and determined that barriers required to mitigate the flood were in place and operable. Additionally, the inspectors performed a walk down of the protected area to identify any modification to the site which would inhibit site drainage during a probable maximum precipitation event or allow water ingress past a barrier. The inspectors also reviewed the abnormal operating procedure (AOP) for mitigating the design basis flood to ensure it could be implemented as written.

2 Enclosure This inspection constituted one external flooding sample as defined in IP 71111.01-05. b. Findings No findings were identified.

February 21, 2012 Mr. Timothy