ML042380089
| ML042380089 | |
| Person / Time | |
|---|---|
| Site: | Monticello, Duane Arnold  |
| Issue date: | 10/06/2004 |
| From: | Raghavan L NRC/NRR/DLPM/LPD3 |
| To: | Weinkam E Nuclear Management Co |
| Beaulieu, David, NRR/DLPM, 415-3243 | |
| References | |
| TAC MC2374, TAC MC2375 | |
| Download: ML042380089 (14) | |
Text
October 6, 2004 Mr. Edward J. Weinkam Director of Regulatory Services Nuclear Management Company, LLC 700 First Street Hudson, WI 54016
SUBJECT:
DUANE ARNOLD ENERGY CENTER AND MONTICELLO NUCLEAR GENERATING PLANT RE: REQUEST FOR AUTHORIZATION TO UTILIZE CODE CASE N-613-1 (TAC NOS. MC2374 AND MC2375)
Dear Mr. Weinkam:
By letter dated February 27, 2004, as supplemented by letter dated July 21, 2004, Nuclear Management Company LLC (NMC) requested U.S. Nuclear Regulatory Commission (NRC) approval for the Duane Arnold Energy Center (DAEC) and Monticello Nuclear Generating Plant (MNGP) to use the alternative examination volume requirements of Code Case N-613-1 in lieu of certain American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, requirements. Specifically, NMC proposed to incorporate reduced ultrasonic examination volume requirements for Class 1 reactor pressure vessel nozzle-to-vessel welds.
The NRC staff has evaluated the above request and concludes that NMC's proposed alternative examination volume requirements provide an acceptable level of quality and safety. Therefore, the NRC authorizes NMC's proposed alternative pursuant to Title 10 of the Code of Federal Regulations (10 CFR) Section, 50.55a(a)(3)(i) for DAECs third 10-Year Inservice Inspection Interval and MNGPs fourth 10-Year Inservice Inspection Interval.
Enclosed is our safety evaluation.
Sincerely,
/RA/
L. Raghavan, Chief, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-331 and 50-263
Enclosure:
Safety Evaluation cc w/encl: See next page
October 6, 2004 Mr. Edward J. Weinkam Director of Regulatory Services Nuclear Management Company, LLC 700 First Street Hudson, WI 54016
SUBJECT:
DUANE ARNOLD ENERGY CENTER AND MONTICELLO NUCLEAR GENERATING PLANT RE: REQUEST FOR AUTHORIZATION TO UTILIZE CODE CASE N-613-1 (TAC NOS. MC2374 AND MC2375)
Dear Mr. Weinkam:
By letter dated February 27, 2004, as supplemented by letter dated July 21, 2004, Nuclear Management Company (NMC) LLC, requested U.S. Nuclear Regulatory Commission (NRC) approval for Duane Arnold Energy Center (DAEC) and Monticello Nuclear Generating Plant (MNGP) to use the alternative examination volume requirements of Code Case N-613-1 in lieu of certain American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, requirements. Specifically, NMC proposed to incorporate reduced ultrasonic examination volume requirements for Class 1 reactor pressure vessel nozzle-to-vessel welds.
The NRC staff has evaluated the above request and concludes that NMC's proposed alternative examination volume requirements provide an acceptable level of quality and safety. Therefore, the NRC authorizes NMC's proposed alternative pursuant to Title 10 of Code of Federal Regulations (10 CFR) Section, 50.55a(a)(3)(i) for DAECs Third 10-Year Inservice Inspection Interval and MNGPs Fourth 10-Year Inservice Inspection Interval.
Enclosed is our safety evaluation.
Sincerely,
/RA/
L. Raghavan, Chief, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-331 and 50-263
Enclosure:
Safety Evaluation cc w/encl: See next page DISTRIBUTION:
PUBLIC DBeaulieu SWall MPadovan PDIII-1 Reading THarris DWeaver WRuland OGC BBurgess, RIII LRaghavan ACRS GHill(2)
ADAMS Accession Number: ML042380089 OFFICE PDIII-1/PM PDIII-1/LA DE/EMCB-A/SC OGC PDIII-1/SC NAME DBeaulieu THarris MMitchell by memo SUttal LRaghavan DATE 10/06/04 08/26/04 07/29/04 09/27/04 10/6/04 OFFICIAL RECORD COPY
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR RELIEF, 10-YEAR INSERVICE INSPECTION INTERVAL NUCLEAR MANAGEMENT COMPANY, LLC DUANE ARNOLD ENERGY CENTER MONTICELLO NUCLEAR GENERATING PLANT DOCKET NOS. 50-331 AND 50-263
1.0 INTRODUCTION
By letter dated February 27, 2004, as supplemented by letter dated July 21, 2004, Nuclear Management Company LLC, (NMC) requested U.S. Nuclear Regulatory Commission (NRC) approval for the Duane Arnold Energy Center (DAEC) and Monticello Nuclear Generating Plant (MNGP) to use the alternative examination volume requirements of Code Case N-613-1 in lieu of certain American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, requirements. Specifically, NMC proposed to incorporate reduced ultrasonic examination volume requirements for Class 1 reactor pressure vessel nozzle-to-vessel welds.
2.0 REGULATORY EVALUATION
Pursuant to Title 10 of the Code of Federal Regulations (10 CFR) Section, 50.55a(g)(4),
components (including supports) which are classified as ASME Code Class 1, 2, and 3 shall meet the requirements, except the design and access provisions and the pre-service examination requirements, set forth in the ASME Code,Section XI, "Rules for Inservice Inspection [ISI] of Nuclear Power Plant Components," to the extent practical within the limitations of design, geometry, and materials of construction of the components. The regulations require that inservice examination of components and system pressure tests conducted during the first 120-month interval and subsequent intervals comply with the requirements in the latest Edition and Addenda of Section XI of the ASME Code incorporated by reference in 10 CFR 50.55a(b) 12 months prior to the start of the 120-month interval, subject to the limitations and modifications listed therein.
Inservice inspection of Class 1, 2, and 3 components is performed in accordance with Section XI of the ASME Code and applicable Addenda as required by 10 CFR 50.55a(g),
except where specific relief has been granted by the Commission pursuant to 10 CFR 50.55a(g)(6)(i). As stated in 10 CFR 50.55a(a)(3), proposed alternatives to the requirements of paragraph (g) may be used, when authorized by the NRC, if the licensee demonstrates that: (i) the proposed alternatives would provide an acceptable level of quality and safety, or (ii) compliance with the specified requirements of this section would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.
2.1 Regulatory Background For DAEC, the applicable inservice inspection ASME Code edition of record is the 1989 Edition of the ASME Code,Section XI. The third 10-Year Inservice Inspection Interval at DAEC is scheduled to end on November 1, 2005.
For MNGP, the applicable inservice inspection ASME Code edition of record is the 1995 Edition, 1996 Addenda of the ASME Code,Section XI. The fourth 10-Year Inservice Inspection Interval at MNGP is scheduled to end on May 31, 2012.
3.0 TECHNICAL EVALUATION
3.1 ASME Code Components Affected
Code Class:
Class 1 Code Edition:
DAEC: ASME Code Section XI, 1989 Edition MNGP: ASME Code Section XI, 1995 Edition, 1996 Addenda Examination Category:
B-D Item Number:
B3.90, Reactor Vessel Full Penetration Nozzle-to-Vessel Welds Component Numbers:
Various, see Tables 1 and 2 3.2 ASME Code Requirements Pursuant to 10 CFR 50.55a(a)(3)(i), NMC is requesting relief from ASME,Section XI, Table IWB-2500-1, Examination Category B-D, Item B3.90 Reactor Vessel Full Penetration Nozzle-to-Vessel Welds, examination requirement IWB-2500-7. Specifically, Figure IWB-2500-7(b) requires examination of a distance of ts/2 adjacent to the weld, where ts equals the vessel wall thickness.
3.3 Reason for Request (as stated)
The required examination volume for the reactor vessel pressure retaining nozzle-to-vessel welds extends far beyond the weld into the base metal, and is unnecessarily large. This proposed alternative would re-define the examination volume boundary to one-half (1/2) inch of base metal on each side of the widest portion of the weld, removing from examination the base metal that was extensively examined during prior inspections, and is not in the high residual stress region associated with the weld.
3.4 Licensees Proposed Alternative to the ASME Code NMC proposes to use a reduced examination volume according to ASME Code Case N-613-1, which extends to one-half (1/2) inch from the widest part of the weld, in lieu of the examination volume requirements of ASME Code Section XI, Figure IWB-2500-7(b), which specify an examination volume extending to a distance of ts/2 from the widest part of the weld.
3.5 Licensees Bases for Alternative In their February 27, 2004, submittal, the licensee provided the following basis for use:
"The required examination volume for the reactor pressure vessel (RPV) nozzle-to-vessel welds extends far beyond the weld into the base metal, and is unnecessarily large. This proposed alternative would re-define the examination volume boundary to one-half (1/2) inch of base metal on each side of the widest portion of the weld. This reduction in base metal inspection will not affect the flaw detection capabilities in the weld and heat affected zone. The proposed reduction in exam volume is base metal only.
The creation of flaws during plant service in the volume excluded from the proposed reduced examination is unlikely because of the low stress in the base metal away from the weld. The stresses caused by welding are concentrated at, or near, the weld.
Cracks, should they initiate, occur in the high-stressed areas of the weld. These high stress areas are contained in the volume that is defined by [ASME] Code Case N-613-1 and are thus subject to examination. During previous examinations, no indications exceeding the allowable limits of the preservice or inservice criteria were found in the reactor pressure vessel [RPV] nozzle-to-shell examination volumes including the base metal areas proposed for exclusion from examination in this request. The prior thorough examination of the base metal and the examination of the high-stressed areas of the weld provide an acceptable level of quality and safety."
On June 15, 2004, the staff issued a request for additional information (RAI) to support the request for relief. In this letter, the staff requested that the licensee provide a supplemental diagram showing the proposed examination volume. In their RAI response dated July 21, 2004, the licensee provided a sketch and a list of all nozzle-to-vessel welds within the scope of this relief request and are included in Attachment 1 and Attachment 2, respectively.
In their RAI response dated July 21, 2004, the licensee clarified that the manual ultrasonic testing (UT) will be performed from the outside diameter (OD) using performance demonstration initiative (PDI) qualified techniques and personnel. The vessels and nozzles are composed of carbon steel; the weld material is ferritic. Nozzle bore sizes range from approximately 2 inches to 28 inches in diameter.
The staff inquired about the positive means of examination to be used to identify the weld extremities. NMC responded that use of the proposed examination boundaries will be conducted in conjunction with their programmatic implementation of the mandated use of ASME Code Section XI, Appendix VIII, Performance Demonstration for Ultrasonic Examination Systems. NMC will implement these requirements in accordance with ASME Code Section XI, Appendix VIII, of the 1995 Edition with the 1996 Addenda, as amended by the Final Rule and approved reliefs/alternatives, as applicable. NMC will comply with these requirements through the use of the Electric Power Research Institute (EPRI) PDI Program. Use of the PDI Program will ensure that the techniques and UT methodologies will be qualified and examination personnel certified by a performance demonstration. The experienced PDI-qualified examiners who will perform the inspections are capable of visually identifying the extremities (widest sections) of the nozzle-to-vessel weld.
The staff also requested that the licensee provide the technical basis to conclude that the portions of the base metal that would be excluded from examination by this relief request are not susceptible to service-induced degradation. In response, the licensee stated that the technical basis for the conclusion was provided in the EPRI Technical Report 1003557, BWRVIP-108: BWR [Boiling Water Reactor] Vessel and Internals Project [BWRVIP] -
Technical Basis for the Reduction of Inspection Requirements for the Boiling Water Reactor Nozzle-to-Vessel Shell Welds and Nozzle Blend Radii (letter dated November 25, 2002, C.
Terry, BWRVIP, to NRC.)
4.0 STAFF EVALUATION The licensee has requested relief from the examination volume requirements specified in Table IWB-2500-1 of the ASME Code Section XI, pertaining to full penetration nozzles in the RPV.
NMC proposed to use a reduced examination volume, extending to one-half (1/2) inch from each side of the widest part of the nozzle-to-vessel weld in lieu of an examination volume extending to a distance equal to one-half (1/2) the through-wall thickness from each side of the widest part of the nozzle-to-vessel weld.
The licensee provided supplemental information showing the specific configuration of the nozzle-to-vessel welds and the revised examination volume, as well as a listing of all welds included within the scope of this relief request. All of the welds for which relief is requested have a configuration as shown in Figure 2 of the ASME Code Case N-613-1. The specific revised examination volume is defined as region A-B-C-D-E-F-G-H. All other aspects of the examination volumes for RPV nozzle-to-vessel welds remain unchanged by the licensees request.
NMC will examine the specified nozzle-to-vessel welds from the OD of the vessel welds using manual ultrasonic methods. This will allow for the extremities of the nozzle-to-vessel welds to be precisely located, thereby assuring complete coverage of the modified examination volume on each side of the weld crown. In addition, NMC stated that, in accordance with Appendix VIII of ASME Code Section XI, the examinations will be performed by PDI-qualified examiners who are capable of visually identifying the extremities or widest sections of the weld.
The acceptability of the reduced examination volume is based on prior full volumetric examinations of the welds and base metal, as well as the internal stress distribution near the weld. Previous examinations showed no indications exceeding the allowable limits of the preservice or inservice criteria. Further, the creation of flaws in the volume excluded from the proposed reduced examination is unlikely because of the low stress in the base metal away from the weld. The stresses caused by welding are concentrated at or near the weld. Cracks, should they initiate, occur in the highly stressed areas of the weld. To provide adequate coverage, these high stress areas and previously repaired areas are to be included in the reduced examination volume proposed by NMC.
Based on the above, the staff finds that the areas to be excluded from examination by the relief request have been found to be free of unacceptable flaws by previous examinations performed during inservice inspection and fabrication. The staff has determined that the initiation of flaws in these regions is highly unlikely due to the lower weld-induced stresses. Therefore, the proposed alternative to reduce the UT examination volume to one-half (1/2) inch from the widest part of the nozzle-to-vessel weld on each side of the weld crown will provide an acceptable level of quality and safety as required in 10 CFR 50.55a(a)(3)(i).
5.0 CONCLUSION
The staff has reviewed the licensees submittal and concludes that the proposed alternative will provide an acceptable level of quality and safety. Therefore, pursuant to 10 CFR 50.55a(a)(3)(i), the staff authorizes the use of ASME Code Case N-613-1 for the remainder of the third 10-Year Interval of the Inservice Inspection Program at DAEC, and for the remainder of the fourth 10-Year Interval of the Inservice Inspection Program at MNGP.
Principal Contributor: V. Rodriguez Date: October 6, 2004
ATTACHMENT 1 ASME Code Case N-613-1, Figure 2
ATTACHMENT 2 Table 1 Duane Arnold Energy Center Nozzle-to-Vessel Welds Within Scope of Request Summary Number Weld Identification and Description Nozzle Configuration Full Volume Exam Previously Completed to Extent Achievable Nondestructive Examination Method 008700 MSC-D001, Reactor Vessel Nozzle - Main Steam Code Case N-613-1 Figure 2 Examined in 1993 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 008900 MSD-D001, Reactor Vessel Nozzle - Main Steam Code Case N-613-1 Figure 2 Examined in 1993 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 005800 FWB-D001, Reactor Vessel Nozzle - Feed Water Code Case N-613-1 Figure 2 Examined in 1996 with General Electric Reactor Inspection System (GERIS); no recordable indications.
UT-0 UT-45 UT-60 006300 FWC-D001, Reactor Vessel Nozzle - Feed Water Code Case N-613-1 Figure 2 Examined in 1996 with GERIS; no recordable indications.
UT-0 UT-45 UT-60 006800 FWD-D001, Reactor Vessel Nozzle Code Case N-613-1 Figure 2 Examined in 1996 with GERIS. One indication was recorded with the 45° T-scan exam that required evaluation per ASME Code Section XI, 1980 Edition, Winter 1981 Addenda and Regulatory Guide 1.150 and was found to be acceptable.
UT-0 UT-45 UT-60 010900 RRG-D001, Reactor Vessel Nozzle -
Recirc. System Riser Code Case N-613-1 Figure 2 Examined in 1993; no recordable indications.
UT-0 UT-45 UT-60 007900 JPB-D001, Reactor Vessel Nozzle - Jet Pump Instrumentation Code Case N-613-1 Figure 2 Examined in 1993; no recordable indications.
UT-0 UT-45 UT-60 008100 LCA-D001,, Reactor Vessel Nozzle Code Case N-613-1 Figure 2 Examined in 1993; no recordable indications.
UT-0 UT-45 UT-60 011500 VIB-D001, Reactor Vessel Nozzle Code Case N-613-1 Figure 2 Examined in 1993; no recordable indications.
UT-0 UT-45 UT-60 Table 2 Monticello Nuclear Generating Plant Nozzle-to-Vessel Welds Within Scope of Request Summary Number Weld Identification and Description Nozzle Configuration Full Volume Exam Previously Completed to Extent Achievable Nondestructive Examination Method 102652 N-1A NV, RPV N-1A Nozzle, Recirc Suction Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102654 N-1B NV, RPV N-1B Nozzle, Recirc Suction Code Case N-613-1 Figure 2 Examined in 2001 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102656 N-2A NV, RPV N-2A Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 2001 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102658 N-2B NV, RPV N-2B Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 2001 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102660 N-2C NV, RPV N-2C Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102662 N-2D NV, RPV N-2D Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102664 N-2E NV, RPV N-2E Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102666 N-2F NV, RPV N-2F Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102668 N-2G NV, RPV N-2G Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 1998 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102670 N-2H NV, RPV N-2H Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 1998 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102672 N-2J NV, RPV N-2J Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102674 N-2K NV, RPV N-2K Nozzle, Recirc Riser Inlet Code Case N-613-1 Figure 2 Examined in 2001 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102676 N-3A NV, RPV N-3A, Main Steam Outlet Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 Summary Number Weld Identification and Description Nozzle Configuration Full Volume Exam Previously Completed to Extent Achievable Nondestructive Examination Method 102678 N-3B NV, RPV N-3B, Main Steam Outlet Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102680 N-3C NV, RPV N-3C, Main Steam Outlet Code Case N-613-1 Figure 2 Examined in 1998 from RPV shell side only due to nozzle configuration; One indication was recorded with the 60° scan which required evaluation per ASME Code Section XI, 1986 Edition with no Addenda and was found to be acceptable. Indication is contained within the reduced volume of Code Case N-613-1, Figure 2.
UT-0 UT-45 UT-60 102682 N-3D NV, RPV N-3D, Main Steam Outlet Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102684 N-4A NV, RPV N-4A, Feedwater Inlet Code Case N-613-1 Figure 2 Examined in 1996 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102686 N-4B NV, RPV N-4B, Feedwater Inlet Code Case N-613-1 Figure 2 Examined in 1998 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102688 N-4C NV, RPV N-4C, Feedwater Inlet Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102690 N-4D NV, RPV N-4D, Feedwater Inlet Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102692 N-5A NV, RPV N-5A, Feedwater Inlet Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102694 N-5B NV, RPV N-5B, Core Spray Inlet Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102375 N-6A NV, RPV N-6A, Spare (formerly Reactor Vessel Head Spray)
Code Case N-613-1 Figure 2 Examined in 1996 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102377 N-6B NV, RPV N-6B, Spare Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102379 N-7 NV, RPV N-7, Reactor Vessel Head Vent Code Case N-613-1 Figure 2 Examined in 1998 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102696 N-8A NV, RPV N-8A, Jet Pump Instrumentation Code Case N-613-1 Figure 2 Examined in 1994 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 Summary Number Weld Identification and Description Nozzle Configuration Full Volume Exam Previously Completed to Extent Achievable Nondestructive Examination Method 102698 N-8B NV, RPV -8B, Jet Pump Instrumentation Code Case N-613-1 Figure 2 Examined in 2001 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102700 N-9 NV, RPV -9, Spare (formerly CRD Return)
Code Case N-613-1 Figure 2 Examined in 1996 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60 102623 N-10 NV, RPV -10, Standby Liquid Control Injection Code Case N-613-1 Figure 2 Examined in 2000 from RPV shell side only due to nozzle configuration; no recordable indications.
UT-0 UT-45 UT-60
Duane Arnold Energy Center cc:
Mr. John Paul Cowan Executive Vice President &
Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, MI 54016 John Bjorseth Plant Manager Duane Arnold Energy Center 3277 DAEC Road Palo, IA 52324 Steven R. Catron Manager, Regulatory Affairs Duane Arnold Energy Center 3277 DAEC Road Palo, IA 52324 U. S. Nuclear Regulatory Commission Resident Inspectors Office Rural Route #1 Palo, IA 52324 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 2443 Warrenville Road, Suite 210 Lisle, IL 60532-4352 Jonathan Rogoff Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Bruce Lacy Nuclear Asset Manager Alliant Energy/Interstate Power and Light Company 3277 DAEC Road Palo, IA 52324 Daniel McGhee Utilities Division Iowa Department of Commerce Lucas Office Buildings, 5th floor Des Moines, IA 50319 Chairman, Linn County Board of Supervisors 930 1st Street SW Cedar Rapids, IA 52404 Craig G. Anderson Senior Vice President, Group Operations 700 First Street Hudson, WI 54016 Mark A. Peifer Site Vice President Duane Arnold Energy Center Nuclear Management Company, LLC 3277 DAEC Road Palo, IA 52324-0351
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 121 Seventh Place East Suite 200 St. Paul, MN 55101-2145 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. Thomas J. Palmisano Site Vice President Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637 October 2003