ML102530112
| ML102530112 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 09/10/2010 |
| From: | Kathy Weaver Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| Weaver K | |
| References | |
| Download: ML102530112 (8) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, DC 20555 - 0001 September 10, 2010 MEMORANDUM TO: ACRS Members FROM: Kathy D. Weaver, Senior Staff Engineer /RA/
Reactor Safety Branch A, ACRS
SUBJECT:
CERTIFICATION OF THE MINUTES FOR THE MEETING OF THE DUANE ARNOLD PLANT LICENSE RENEWAL SUBCOMMITTEE, JUNE 8, 2010 - ROCKVILLE, MARYLAND The minutes of the subject meeting have been certified on September 8, 2010, as the official record of the proceedings for that meeting. A copy of the certified minutes is attached.
Attachment:
Certified Minutes cc: ACRS Staff Engineers
UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, DC 20555 - 0001 MEMORANDUM TO: Kathy Weaver, Senior Staff Engineer Reactor Safety Branch A, Advisory Committee Reactor Safeguards FROM: Dennis L. Bley, Chairman Plant License Renewal Subcommittee
SUBJECT:
CERTIFICATION OF THE MINUTES FOR THE MEETING OF THE SUBCOMMOTTEE ON PLANT LICENSE RENEWAL REGARDING DUANE ARNOLD ENERGY CENTER ON JUNE 8, 2010 IN ROCKVILLE, MARYLAND I hereby certify, to the best of my knowledge and belief, that the minutes of the subject meeting on June 8, 2010, are an accurate record of the proceedings of that meeting.
/RA/ September 8, 2010
____________________________________ ____
Dr. Dennis Bley, Chairman Date Plant License Renewal Subcommittee
Certified on: September 8, 2010 By: Dennis L. Bley ADVISORY COMMITTEE ON REACTOR SAFEGUARDS MINUTES FOR THE MEETING OF THE SUBCOMMITTEE ON PLANT LICENSE RENEWAL REGARDING DUANE ARNOLD ENERGY CENTER JUNE 8, 2010 ROCKVILLE, MARYLAND INTRODUCTION On June 8, 2010, the Advisory Committee on Reactor Safeguards (ACRS) Subcommittee on Plant License Renewal held a meeting regarding Duane Arnold Energy Center (DAEC) in Room T-2B1, at 11545 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to hear presentations and discuss the DEAC application for license renewal and NRC staff review of it.
In addition to the NRC staff, representatives from DAEC made presentations to the Subcommittee. The meeting was convened at 8:30 am and adjourned at 11:12 am.
ATTENDEES ACRS Members NRC Staff (continued)
D. Bley, Chairman T. Morgan, NRR/DCI S. Armijo, Member C. Hunt, NRR/DCI M. Bonaca, Member A. Hiser, NRR/DLR J. Stetkar, Member S. Lee, NRR/DLR H. Ray, Member B. Lehman, NRR/DLR W. Shack, Member E. Smith, NRR/DSS J. Sieber, Member A. Sutton, NRR/DSS J. Barton, Consultant B. Rogers, NRR/DLR R. Vaucher, NRR/DLR A. Wong, NRR/DLR ACRS Staff M. Diaz, NRR/DCI K. Weaver, ACRS Staff W. Holdyon, NRR/DLR R. Sun, NRR/DCI D. Britiner, NRR/DLR NRC Staff C. Eccleston, NRR/DLR B. Harris, NRR/DLR Q. GAN, NRR/DLR B. Holian, NRR/DLR B. Fu, NRR/DLR B. Jose, NRC/RIII J. Raval, NRR/DSS A. Prinaris, NRR/DLR D. Wrona, NRR/DLR J. Susco, NRR/DLR P. Cooper, NRR/DLR G. Cheruvenki, NRR/DCI G. Shukla, NRR/DLR T. Tran, NRR/DLR D Neuyen, NRR/DLR S. Mir, NRR/DLR C. Doutt, NRR/DLR E. Wong, NRR/DCI L. Regner, NRR/DLR 1
DEAC K. Putnam C. Lastunzo K. Cheu C. Bock K. Kleinheinz M. Fairchild E. Sorenson H. Giorgio C. Rushworth A. Thomas OTHERS P. Aitken, Dominion S. Ynen, Dominion M. Wilson, Dominion W. Zipp, Dominion M. Heath, Progress Energy J. Hesser, APS/Palo Verde R. Barnes, APS/Palo Verde C. Wilson, Exelon The presentation slides and handouts used during the meeting are attached to the office copy of these minutes. The presentations to the Subcommittee are summarized below.
SUMMARY
OF MEETING Opening Statement Chairman Dennis Bley convened the meeting by introducing the ACRS members present.
Chairman Bley stated that the purpose of the meeting was to review the Duane Arnold Energy Center (DAEC) License Renewal Application, the draft Safety Evaluation Report (SER) with open items, and associated documents. He stated that the Subcommittee would hear presentations from representatives of Office of Nuclear Reactor Regulation (NRR), and the applicant, Florida Power and Light - Duane Arnold (FPL- DA) DAEC. He also stated that the Subcommittee would gather information, analyze relevant issues and facts, and formulate proposed positions and actions, as appropriate for deliberation by the Full Committee.
Chairman Bley acknowledged that the Committee had received no written statements or requests for time to make oral statements from members of the public.
DISCUSSION OF AGENDA ITEMS Staff Introduction Mr. Brian Holian, Director of the Division of License Renewal in NRR, introduced the principal staff members present. He then called upon the applicants presenter, Mr. Christopher Costanzo, DAEC Site Vice President.
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The Applicant NPPD Presentation Overview Mr. Christopher Costanzo, DAEC Site Vice President, provided a brief overview, reasons for the subcommittee meeting, and introduced the presenters from DAEC.
DAEC Operating History Mr. Ken Kleinheinz, DAEC Engineering Director provided an overview of the operating history of DAEC including the 1985 power uprate, the 2001 extended power uprate, and several plant upgrades DAEC License Renewal Project Overview Mr. Ken Putnam described the scoping process and the DAEC Time-limited aging analysis.
Technical Items of Interest - Torus Coatings Mr. Ken Putnam stated that although not an open item, an item that has been of some interest is the DAEC torus coatings. Mr. Putnam explained that the DAEC IWE Program has identified numerous areas of zinc depletion on the torus coatings and minor pitting. Mr. Putman stated that the DAEC torus was last coated in 1985. Mr. Putnam explained that the coating on the DAEC torus is a zinc oxide coating with a belly band of phenolic at the water line. Mr. Putnam stated that DAEC does perform routine inspections, under the IWE Program and that any areas with problems are repaired during refueling outages. Mr. Putnam stated that DAEC plans to recoat underwater surfaces of the torus in the 2012 Refueling Outage.
Open Item-3.0.3.1.7, Buried Piping and Tanks Inspection Program Mr. Ken Putnam explained that the issue discussed in the open item associated with buried piping, is that recent industry events involving leakage from buried and underground piping may warrant changes to the Buried Piping and Tanks Inspection Program. Mr. Putnam stated that DAEC has developed implementing procedures and that these documents lists all buried piping at DAEC, and provides a risk ranking to prioritize piping sections for inspection, based on likelihood and consequence of failure. Mr. Putnam clarified that underground piping at DAEC is accessible and where applicable is managed by the External Surfaces Monitoring Program. Mr. Putnam further stated that DAEC had no history of leaks with in-scope piping, and that previous opportunistic examinations of fire protection piping found the piping in good condition. Mr. Putnam also stated that torsional guided wave examinations have been performed on portions of the residual heat removal service water, emergency service water, and river water supply systems. Additionally, Mr.
Putnam stated that ultrasonic testing examination of the buried diesel fuel oil storage tank, performed in 2001, found the tank in good condition. Mr. Putnam stated that more torsional guided wave examinations of DAEC piping are scheduled for 2010. Mr. Putnam stated that in terms of resolving the open item, DAEC submitted a response to the NRC's questions on May 28, 2010 and that DAEC would work with the staff on anything more that needed to be done.
Open Item-3.0.3.3.3, Small Bore Piping Program - Socket Welds Mr. Putnam explained that the GALL Report recommends a volumetric exam of small bore Class 1 piping using qualified techniques. Mr. Putnam explained that currently there is no qualified volumetric examination technique for socket welds. Mr. Putnam also explained that surface examinations do not detect flaws coming from the inside out. Mr. Putnam explained that the NRC 3
staff thinks that, regardless of the qualification of the examination, there are exams that can be done that would provide meaningful information, even if the socket weld configurations preclude a perfectly qualified exam.
Mr. Putnam explained that since DAEC submitted the application, there have been ongoing industry efforts to improve the examination technologies, which appears to be making progress.
Mr. Putnam stated that DAEC submitted a response to the NRC's open item and is proposing to do a volumetric exam of 10 percent of the Class 1 socket welds. Mr. Putnam further explained that if a qualified technique is available, DAEC will use it, and if one is not available, DAEC will develop a plant-specific procedure for performing these exams.
NRC Presentation, Division of License Renewal Mr. Brian Harris, Senior Project Manager, NRC, provided a brief overview of the scope of the NRC staffs presentation. Mr. Harris noted that the draft SER contained two open items. Mr.
Harris stated the first open item is Open Item 3.0.3.1.7 which is related to the Buried Piping and Tanks Inspection Program and the second open item is Open Item 3.0.3.3.3 which is related to socket welds in the small bore piping program. Mr. Harris stated that there were no confirmatory items identified in the draft SER. Mr. Harris stated that the Aging Management Program Audit was conducted August 10-14, 2009, the Scoping and Screening Audit was conducted August 24-28, 2009, and that Region III conducted two inspections, one on November 2-6, 2009 and the other on November 16-20, 2009. Mr. Harris also discussed the results of Section 2 of the SER, Structures and Components Subject to Aging Management Review, and stated that the staff concluded that the applicants methodology was consistent with the requirements of 10 CFR.54.4(a) and 54.21(a)(1).
NRC Presentation, Region III Mr. Benny Jose, the Region III Inspection Team leader gave an overview of the results of the regional inspections. Mr. Jose stated that the inspection team looked at scoping and screening of non-safety related systems and also looked at 30 of the 43 aging management programs.
Mr. Jose stated that for the Aging Management Program reviews, the team looked at the program documentation, performed plant walk-downs, and interviewed plant personnel. Mr. Jose stated that operating experience was another area the team reviewed to make sure that DAEC accounts for internalized industry operating experience. Mr. Jose further stated that for the operating experience review, the team looked at the DAEC Corrective Action Programs, their Corrective Action Program reports, as well as system health reports, and the program results. Mr. Jose stated that the team concluded that the scoping and screening as related to the Aging Management Programs were appropriate. Mr. Jose further stated that the documentation supporting the application was auditable and retrievable, and the team found that the documentation to be acceptable. Mr. Jose stated that the Regional Inspection Report is documented in Inspection Report 2009-010.
NRC Presentation, Division of License Renewal Mr. Harris discussed the results of Section 3 of the SER, Aging Management Review Results and provided a discussion of the two open items identified in the SER. Mr. Harris described Section 3.0.3 which contains the staff's review of the applicant's Aging Management Program or AMPs. Mr. Harris stated that 43 AMPs were reviewed by the staff of which 14 are new programs and 29 were existing programs. Mr. Harris stated that 20 AMPs were identified as consistent with 4
the GALL Report, 8 were consistent with enhancements, 9 were consistent with exceptions, 2 were consistent with both enhancements and exceptions and 4 were identified as plant-specific.
Mr. Harris stated that during the staff's review, Open Item 3.0.3.3.3 was identified relating to the management of small bore piping socket welds. Mr. Harris stated that during the review, the staff indicated to the applicant that the staffs concern was that a visual inspection would be inadequate, as it would not detect flaws initiating from the inside diameter. Mr. Harris stated that the staffs concern stemmed from review of industry operating experience for failures in small bore piping socket welds which resulted in unplanned shutdowns. Mr. Harris stated that the staff's position remains that periodic volumetric examination is needed for small bore socket welds in order to be consistent with the recommendations of the GALL. Mr. Harris explained that the applicant has provided an RAI response and the staff has performed a preliminary review of this response related to socket welds and will confirm this item for the final SER.
Mr. Harris also described Open Item 3.0.3.1.7 identified in the draft SER, which is related to the Buried Piping and Tanks Inspection Program. Mr. Harris explained that there have been a number of recent entry events involving leakage from buried and underground piping in which the causes have included coating damaged during backfill of piping; failure of fiberglass piping; failure of buried piping in and around the piping penetrations; and failures of piping in trenches. Mr. Harris explained that the applicant's program is a new program, and credits incorporation of industry experience later during the period of extended operation. Mr. Harris stated that the staff needed further information to evaluate the impact that these recent industry events might have on the buried piping program; therefore, the staff issued an RAI in May to complete its review. Mr. Harris stated that the applicant has recently provided an RAI response for this resolution. Mr. Harris explained that the staff was in the process of performing a preliminary review of this information related to buried piping and would confirm this item for the final SER review.
Mr. Harris also further discussed the DAEC torus coating item of interest. Mr. Harris also discussed Section 4 of the draft SER which contains the staff's review of the time-limited aging analysis or TLAA.
Mr. Harris stated that in conclusion, on the basis of its review, the staff determines that pending resolution of the two open items discussed, the requirements of 10 CFR 5429(a) have been met for the license renewal of the Duane Arnold Energy Center.
COMMENTS AND OBSERVATIONS FROM THE SUBCOMMITTEE MEMBERS Member Sieber commented that the application was appropriate, and the staff's review and their RAIs were appropriate. Member Sieber further stated that the DAEC plant compared to others of this age is in pretty good condition.
Member Armijo commented that the application was very good and that the staff has done a very good review. Member Armijo also stated the plant has done a good job being the lead plant in the industry to apply hydrogen water chemistry and noble metals and he believes that that is one of the reasons why they have had such good experience with their core internals and their piping.
Member Stetkar thanked the staff for their aggressive reviews of operating experience and for gaining a lot of insight from that. Member Stekar stated that this probably helped a lot in the staffs inspections and identifying potential issues.
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Member Shack stated that he was glad to see that the torus is going to get recoated with a good modern coating. Member Shack also stated that the use of the torsional guided waves examinations was new to him, and that industry has been sort of relying totally on opportunistic inspections up until now. Member Shack further stated that even if the use of torsional guided wave examinations inspections isn't a perfect tool, at least any tool that would help get some insight into degradation of buried piping is a helpful kind of development.
SUBCOMMITTEE CONCLUSIONS Chairman Bley concluded the meeting by thanking the staff and the applicant. He stated that the presentations and discussions were very good. The meeting was adjourned.
REFERENCES
- 1. Safety Evaluation Report (SER) with Open Items, dated May 2010
- 2. NRC Inspection Report 05000331/2009010, dated January 20, 2010
- 3. NRC Audit Summary Report, dated November 30, 2009
- 4. Duane Arnold Energy Center License Renewal Application 6