RA09-056, Notification of Deviation from BWRVIP-75-A Guidance

Notification of Deviation from BWRVIP-75-A Guidance

ML092050649
Person / Time
Site:	LaSalle
Issue date:	07/24/2009
From:	Wozniak D Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GL-88-001, RA09-056
Download: ML092050649 (2)

Text

LaSalle Generating Station www. exeloncorp.com 2601 North zest Road Nuclear Marseilles, IL 61341-9757 RA09-056 10 CFR 50.4(a)

July 24, 2009 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 LaSalle County Station, Unit 1 Facility Operating License Nos. NPF-1 1 NRC Docket No. 50-373

Subject:

LaSalle County Station Unit 1 Notification of Deviation from BWRVIP A Guidance

Reference:

BWRVIP-75-A, "BWR Vessel and Internals Project Technical Basis for Revisions to Generic Letter 88-01 Inspection Schedules" This letter is to provide notification to the NRC of a deviation from the Boiling Water Reactor Vessel and Internals Project (BWRVIP) guidelines for LaSalle County Station Unit 1. The deviation is from a "needed" element of the BWRVIP program. The needed element is the conduct of inspections in accordance with the guidance of BWRVIP-75-A, "BWR Vessel and Internals Project Technical Basis for Revisions to Generic Letter 88-01 Inspection Schedules". BWRVIP-75-A requires examination of Category D welds every three (3) outages, or every six (6) years.

Two Category D welds have recently been identified on the Unit 1 reactor water cleanup flow monitoring spool piece located in the Unit 1 drywell, and these welds have not been examined since the pre-service examinations in 1981.

The spool-piece containing the two Category D welds is scheduled for replacement in the upcoming Unit 1 thirteenth refueling outage, currently scheduled to begin on February 8, 2010.

The deviation from the BWRVIP guidelines has been documented, reviewed and approved in accordance with EGC procedures. The review concluded that the risk associated with the approximate 14-month duration until replacement of the spool-piece in the refueling outage is minimal based upon the lack of Alloy 82 or 182 in the weld materials, successful performance of the ASME System Leak Test at the conclusion of the previous Unit 1 refueling outage, no indication of increasing levels of unidentified leakage, humidity, or radiation levels in the Unit 1 drywell, and maintenance of reactor water chemistry within BWRVIP guidelines.

This letter is being transmitted for information only and EGC is not requesting any action from the NRC staff.

July 24, 2009 U.S. Nuclear Regulatory Commission Page 2 There are no regulatory commitments contained in this letter. Should you have any question concerning this letter, please contact Mr. Terrence W. Simpkin, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully, David Wozniak Site Vice President LaSalle County Station Cc: Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station NRR Project Manager for LaSalle NRC BWRVIP Project Manager

Text

LaSalle Generating Station www. exeloncorp.com 2601 North zest Road Nuclear Marseilles, IL 61341-9757 RA09-056 10 CFR 50.4(a)

July 24, 2009 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 LaSalle County Station, Unit 1 Facility Operating License Nos. NPF-1 1 NRC Docket No. 50-373

Subject:

LaSalle County Station Unit 1 Notification of Deviation from BWRVIP A Guidance

Reference:

BWRVIP-75-A, "BWR Vessel and Internals Project Technical Basis for Revisions to Generic Letter 88-01 Inspection Schedules" This letter is to provide notification to the NRC of a deviation from the Boiling Water Reactor Vessel and Internals Project (BWRVIP) guidelines for LaSalle County Station Unit 1. The deviation is from a "needed" element of the BWRVIP program. The needed element is the conduct of inspections in accordance with the guidance of BWRVIP-75-A, "BWR Vessel and Internals Project Technical Basis for Revisions to Generic Letter 88-01 Inspection Schedules". BWRVIP-75-A requires examination of Category D welds every three (3) outages, or every six (6) years.

Two Category D welds have recently been identified on the Unit 1 reactor water cleanup flow monitoring spool piece located in the Unit 1 drywell, and these welds have not been examined since the pre-service examinations in 1981.

The spool-piece containing the two Category D welds is scheduled for replacement in the upcoming Unit 1 thirteenth refueling outage, currently scheduled to begin on February 8, 2010.

The deviation from the BWRVIP guidelines has been documented, reviewed and approved in accordance with EGC procedures. The review concluded that the risk associated with the approximate 14-month duration until replacement of the spool-piece in the refueling outage is minimal based upon the lack of Alloy 82 or 182 in the weld materials, successful performance of the ASME System Leak Test at the conclusion of the previous Unit 1 refueling outage, no indication of increasing levels of unidentified leakage, humidity, or radiation levels in the Unit 1 drywell, and maintenance of reactor water chemistry within BWRVIP guidelines.

This letter is being transmitted for information only and EGC is not requesting any action from the NRC staff.

July 24, 2009 U.S. Nuclear Regulatory Commission Page 2 There are no regulatory commitments contained in this letter. Should you have any question concerning this letter, please contact Mr. Terrence W. Simpkin, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully, David Wozniak Site Vice President LaSalle County Station Cc: Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station NRR Project Manager for LaSalle NRC BWRVIP Project Manager