United States Nuclear Power
Federal Regulations, Codes, & Standards
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Section XI Meeting Notes - December 2001
Prepared By: Dajun Song
Company: Progress Energy
Meeting Dates: December 10 - 13, 2001
Meeting Location: Boca Raton, Florida
1. Next Section XI meeting is in Los Angeles, CA. Wilshire Grand Hotel (213) 688-7777. $155.00/night (02/25/02 03/01/02). Please make your reservations as soon as you can.
2. NRC Report
- Code Case Reg. Guides. Four Reg. Guides (III, XI, O&M, and Unacceptable Code Cases) will be published for public comment on December 18, 2001.
- Risk Based Inspection Submittals. To date 20 submittals approved, and 25 being reviewed. Two most common issues facing utilities are; transitioning to RBI within a given inspection interval, and how do you handle High Energy Line inspection commitment in site Tech. Specs/FSARs? (50.59 to change them?)
3. Task Group on ISI Optimization will be elevated to Working Group or Special Working Group status. This means that all TG members will get free code books.
4. ISI/NRC Symposium was a great success. Next one is scheduled for 2003 in Cleveland, OH.
5. Task Group on Cast Stainless Steel - Code Case was developed (similar to pump casing weld) to address examination. Still waiting input from SGE&S.
6. Task Group on ISIO - Working on changing code words to address on-line ISI, and address aging management in the Code.
7. SC XI is forming a TG to codify examination requirements for CRDM head penetrations. They are looking for volunteers. It would be beneficial to participate. However, this will require addition time and travel.
8. In the future, there will be 1 Code Edition and 2 Code Addendum.
9. The Main Committee will now be called Standards Committee.
10. The following Code Cases were reaffirmed through SGWCS;
N-498-4, N-522, N-533-1, N-616, N-586, N-619, N-323-1, N-307-2, and N-526.
11. The following Code Cases were voted to expire through SGWCS;
N-590, N-591, and N-630
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
SCXI - Subcommittee Section XI
Code Committee Items
1. Task Group on Alternative NDE Methods for Repair/Replacement/Modification (RRM) Activities. - The TG was formed recently. Approved the charter for the group, and is in the process of writing a white paper to address scope of the TG. The following items were discussed:
2. Proposed Code Case (N-658), Risk Informed Safety Classification for Use in Risk-Informed Repair and Replacement Activities, failed MC. Sent back to WG. MC negatives were addressed, and passed through SGWCS. One major technical issue dealt with classification of piping supports/snubbers. It was felt that the hangers/snubbers shall have the same classification as the highest ranked piping segment within the piping analytical model, but gave the owner the option to further refine the classification ranking.
3. Proposed code case, Alternate Requirements for Class 1 and 2 Surface Examinations. This code case limits the surface examination to welds that are susceptible to OD attack. Letter balloted at SCXI, with 7 negative votes. Goes back to WG.
4. Proposed Code Case that revises the current (1992 Edition and beyond) VT-2 and VT-3 requirements back to the level stipulated in 1989 Edition (or similar). In later Editions of the Code, the VT-2 and VT-3 has gotten more stringent. Item goes to SCXI.
5. Code Case N-613, Ultrasonic Examination of Full Penetration Nozzles, Examination Category B-D, Item Nos. B3.10 and B3.90, Reactor Vessel-To-Nozzle Welds, Fig. IWB-2500-7(a), (b), and (c), Section XI, Division 1, is being revised to be consistent with the Regulation. Currently, the scanning requirements are different. Goes to SCXI.
6. Proposed Code Case - addresses alternative examination requirement for bolting (B-G-1, B-G-2, and C-D). It clarifies selection criteria, and provides consistency between the Class 1 and Class 2 examinations. Also, it allows surface examination of bolting in lieu of volumetric examination when bolting is removed (such as RPV studs). It passed BNCS, and will be published. Good Code Case to look into.
7. Proposed code change. Adds the following words to the open flow path test, "Test personnel need not be qualified for VT-2 examination." Passed MC, goes to BNCS.
8. Code change to address augmented examination requirements for concrete containments following repair/replacement activity. This change mostly applies to plants that have post-tensioning systems (CR3) that may replace their SG, and must cut some tendons. Passed MC, goes to BNCS.
9. Proposed Code Case to eliminate surface examination of socket welds. Item failed SCXI. WGISC decided to add additional VT-2 examination to the proposed code case. At WG for more discussions.
10. Code revision Fatigue Criteria for Examination of Class 1 Piping Welds. This change will require examination (UT) of HPSI welds that between the pipe diameter of > 1-1/2" and <4". 10% sample will be required. Passed SG, goes to SCXI in February 2002.
11. Code revision to clarify the wording in the Code such that components in lines that are exempt are themselves exempt. At WGISC.
12. Code Case and Code Change to address the timing of austenitic vessel preservice examination. At SCXI.
13. 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. The plan is to present a draft code case at the February 2002 meeting, and vote at August 2002 SCXI meeting. Oh, by the way this is for only PWRs. It looks very promising.
14. Here is a bone for the BWR guys. Proposed code case Alternate Examination Requirements for BWR RPV Shell Welds. This code case incorporates recommendations of BWRVIP-05. Action is still waiting for the White Paper before it can proceed.
15 Proposed changes to IWL-2510 (b) to provide requirements for additional surface examinations of tendon anchorage suspect areas. Passed SGWCS.
16. TGISIO is working on an item to eliminate volumetric examination of Regenerative (Regen.) and Residual Heat Removal (RHR) Heat Exchangers, and replace with VT-2. Some utilities already have relief to perform VT-2, and some exempt the Regen. based on size (if its Class 2). This is an opportunity to save on dose.
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 IWA-2312 (a) and (b), that Appendix VII be regarded as the stand-alone requirement in lieu of SNT-TC-1A or CP-189 for the qualification and certification of ultrasonic examination personnel?
2. Question: Is it a requirement of IWA-6000 of Section XI, Division 1, 1989 Edition and later Edition and Addenda that the Form NIS-2 include entry information (See Form NIS-2, item 6) on the item/component that is being replaced in addition to the entry information on the replacement item/component to be installed at the location of the item removed?
The following Intent Inquires was approved. (Note 1: Intent inquires require approval of SCXI members, and need accompanying code change. Note 2: Occasionally, Requirement Inquires goes to SCXI because the inquiry did not get a unanimous vote at Inquiry Session.)
1. Question: Is it the intent of IWE-2500(c)(1) that a VT-1 visual examination need only be performed on one side of a component if only that side is subject to augmented examination? (Goes to SCXI in February)
Reply: YES. IWE-2500 (b)(1), 2001 Edition provides clarification for surface areas requiring augmented examination.