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ASME Section XI Meeting Notes - September 2002
Prepared By: Dajun Song and Jerry Crider
Company: Progress Energy
Meeting Dates: September 9 - September 12, 2002
Meeting Location: Hollywood, Florida
1. Next Section XI meeting is in Orlando, FL. The meeting dates 12/09/02 12/12/02. The Wyndham Palace, (407) 827-2727. $139.00/night. Please make your reservations by 11/17/02.
2. NRC Report
3. The Code is going metric. Any code action item going to SCXI beginning in December has to have metric and English units. It will be a "hard" conversion. Conversion standard will be mailed out to the code committee members. The goal is to have metric units appear starting with 2004 Edition.
4. ASME XI was asked by the NRC to codify boric acid inspections (i.e. incorporating GL 88-05 into the Code). New TG is being formed to accomplish this task. I was asked to participate. This TG will report to WGISO. The chairman is Todd Anselmi of Wolf Creek.
5. TG on Cast Stainless Steel. Industry held a conference call. Will try to resolve this issue ASAP.
6. Code Committee is looking at situations where the Code Committee approves and publishes a Code Case that the NRC does not like. In the future, the Code Committee will consider NRC comments/position when taking code action.
7. In the future, there will be 1 Code Edition and 2 Code Addendum.
8. ASME Web site. Password is required to access 2nd tier of ASME web page.
Code Committee Protocol
A quick lesson on code committee protocol. Typically, a code item starts at Task Group (TG) level and must work its way through BNCS before it gets published. Here is the pecking order.
TG Task Group
WG Working Group
SC XI Subcommittee Section XI
MC Main Committee (Items can still pass with 3 negative votes if its a "second
BNCS Board of Nuclear Codes and Standards
Some popular "Groups";
TGISIO ISI Optimization
WGISC Inspection of Systems and Components
WGRBI Risk Based Inspection
WGPT Pressure Test
WGGR General Requirements
SGWCS Water Cooled Systems
SGNDE Nondestructive Evaluation
SGRRM Repair, Replacement, and Modifications
SGES Evaluations and Standards
SCXI - Subcommittee Section XI
Code Committee Items
1. Task Group on Alternative NDE Methods for Repair/Replacement/Modification (RRM) Activities. The TG decided to pursue an ASME XI Code Case. This is a departure from last meeting. There are six issues that need to be resolved. They are:
Draft code case will be brought forward at the next meeting.
2. Risk-Informed Containment Examination. The charter of this Task Group is to advance the use of risk-informed and performance-based methodologies to determine the appropriate examination requirements for containments.
3. Working Group on General Requirements (WGGR).
4. Working Group on Implementation of Risk Based Examination (WG-RI).
Comments on the proposed non-mandatory Appendix "Risk-Informed Requirements for Piping" are still being addressed. The proposed Appendix will incorporate Code Cases N-560-2, N-577-1 and N-578-1 into Section XI. In addition, this Appendix will provide new guidance on the use of risk-informed methods in performing preservice inspections, pressure tests, and repair/replacement activities.
5. Task Group on Owners Reporting Requirements.
6. Task Group on Alloy 600/182/82 Issue.
7. Code revision - Thermal Fatigue Criteria for Examination of Class 1 Piping Welds. This change will require examination (UT) of HPSI welds that are between the pipe diameter of > 1 1/2" and <4". 10% sample will be required. Reaffirmed at both WGISC and SGWCS. Passed MC. Goes to BNCS.
8. Proposed code case (N-662), Alternate Requirements for Class 1 and 2 Surface Examinations. This code case limits the surface examination to welds that are susceptible to OD attack. This code case has been published.
9. Examination Requirements for Multiple Integral Welded Attachments on One Unique Vessel. This proposed code change and Code Case clarifies examination requirements for integral attachments to vessels. "For single vessels, only one welded attachment shall be selected for examination. The attachment selected for examination shall be an attachment that serves as a support load path during normal system operation." Good Code Case. Passed WGISC. Discussed at SGWCS with no action taken. Action item will be rewarded and brought back.
10. A new item to clarify code requirement was brought forward. Note 2 in Examination Category B-G-2 list components subject to examination. Is steam generators part of note? The answer is NO. Still at WGISC.
11. Proposed code changes to IWL-2510(b) to provide requirements for additional surface examinations of tendon anchorage suspect areas. Passed MC. At BNCS.
12. This item incorporates Code Case N-602 into the code. This Code Case allows the procurement of Code material by Owners and Repair Organizations as long as they comply with IWA-1400(n) (i.e., App. B or NQA-1). This is beneficial to plants built to B31.1 and B31.7. Very good Code Case. Passed BNCS. However, the Code Committee is holding back from publishing this Code Case. This Code Case has drawn objections from manufactures ("N" stamp holders) and accreditation folks. They object to the Code Case for obvious reasons. Another set of presentations will be made this Friday to make their cases (ASME XI and "N" stamp holders).
13. The following Code Cases were acted through SGWCS:
Reaffirmed the following Code Cases;
Annulled the following Code Cases;
14. Mr. Owen Hedden of Westinghouse is working on a Code Case to extend the 10-year interval RPV ISI exams by 10 or more years. This means performing the RPV exams once every 20 years. The weld category includes B-A, B-D, B-F, B-J, B-K, and B-N. White Paper is written. Pilot plants have been identified. The results of the pilot plant study will be submitted (as a relief request) to the NRC within one year. Draft Code Case is out for comments. It looks very promising.
15. Proposed code case and code revision to address inspection requirement for PWR CRD and ICI housing. This action will clarify inspection requirements for welds in ICI housing. At WGISC.
16. A utility has a Class 2 bolt that is greater than 2" on one end, and less than 2" on the other side. Both ends are threaded. Does this bolt require a volumetric exam? A Code Case will be developed to address this situation.
17. REPEAT. The NRC did not approve Code Case N-648, Alternative Requirements for Inner Radius Examinations of Class 1 Reactor Vessel Nozzles because the acceptance criteria referenced in the Code Case was wrong. Also, NRC is strongly urging utilities to use 1 mill wire for visual qualification. Code committee will revise the code case. Meanwhile utilities can submit relief with the correction/provision, and should have no problem getting approval to use the code case.
Note: To expedite the Code Inquiry process, all inquiries must be received by the ASME office (Oliver Martinez, Secretary) two weeks prior to the Code meeting.
The following Requirement Inquires was approved.
1. Question: Is it a requirement of examination category C-B that the acceptance standards of IWC-3511 be utilized for austenitic as well as ferritic steels?
Reply: IWC-3511 does not address automatic steel. However, rules were added in 2002 addenda to address austenitic steel.
2. Question: May sites with multiple plants, and a containment design that has no pre-stressing and unbonded post-tensioning systems, that are essentially identical in design and similarly exposed to or protected from the outside environment, use IWL-2421, and modify their examination requirements?
3. Question: Is Owner verification of item acceptability/suitability (IWA-7220) required for all replacement items being installed under replacement activities (i.e., not only for failed items)?
4. Question: Does IWA-7220 require that material identification and documentation be provided for replacement items in order for the Owner to perform a valid Acceptability/Suitability evaluation?
Reply: NO. IWA-7220 does not specify material identification and documentation requirements. However, IWA-7210 or the Owners QA program may require material identification and documentation to meet the Construction Code or design requirements.
5. Question: Is it a requirement of Appendix VIII, VIII-2100(d)(5) that the refracted sound beam angle(s) produced by compound angle search units be measured using a reference standard?
6. Question: Is it a requirement of Appendix VIII, VIII-2100(d)(5) that the refracted sound beam angle(s) produced by compound angle search units be verified initially and repeated from examination to examination?
The following Intent Inquiry was approved (by SC XI). (Note 1: Intent inquires require approval of SCXI members, and need accompanying code change. Note 2: Occasionally, Requirement Inquires go to SCXI because the inquiry did not get a unanimous vote at Inquiry Session.)
1. Question: Is it the intent of ASME Section XI, Appendix VIII that welds in austenitic piping containing structural weld inlay (Corrosion Resistant Clad) are to be examined in accordance with Appendix III until such time as performance demonstration requirements are specified?