Federal Regulations, Codes, & Standards
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ASME Section XI Meeting Notes - September 2004
Prepared By: Dajun Song and
Company: Progress Energy
Meeting Dates: August 30 – September 3, 2004
Section XI meeting is in
2. NRC Report.
Next Draft Reg. Guide (Revision 14) was
published for public comment on
The NRC staff has completed its formal review
of the changes to the ASME Code incorporated into the 2001 Edition through
the 2003 Addenda. The proposed rule
was published for public comment on
3. The process of annulling code cases. Code cases that have been incorporated into a code edition and addenda that the NRC has endorsed through 10CFR50.55a, AND are in the Regulatory Guide are annulled. The rest will be reaffirmed.
4. ISI/NRC Symposium
scheduled for 2005 has been cancelled due to lack of resources from NRC. However, at the ASME Pressure Vessel
5. Snubber Testing. There was a Code action to remove snubber testing from ASME XI. This action failed. ASME XI and OM Code members will meet to discuss the future of snubber testing.
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
SG – Subgroup
SC XI – Subcommittee Section XI
MC – Standards Committee (Items can still pass with 3 negative votes if it’s a “second consideration” vote.)
BNCS – Board of Nuclear Codes and Standards
Some popular “Groups”;
TG on Alloy 600
TG on Boric Acid Corrosion
WGISIO – ISI Optimization
WGISC – Inspection of Systems and Components
WGRBI – Risk Based Inspection
WGPT – Pressure Test
WGIWE/IWL – Containment
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. One issue is to resolve using ASME XI acceptance criteria vs. Section III. A technical paper will be developed to address this issue.
2. Task Group on Boric Acid. Proposed Code Case N-722 passed SCXI. This Code Case provides examination requirements for Alloy 600/182/82 components. Three items to note. One – The examination frequency is every refueling outage. Two – Examination Method is VT-2 (not VT-5). Three – The examiner requires additional 4 hours of training on detection of borated water leakage from Alloy 600/182/82 components.
3. A presentation on the proposed Code Case for repairing small-bore nozzles using a mechanical nozzle seal assembly (MNSA) was presented and discussed. The item passed WGISC. It goes to SGWCS in December.
4. Proposed revision to Code Case N-586, Alternative Additional Examination Requirements for Class 1, 2, and 3 Piping, Components, and Supports. This revision incorporates NRCs concern/comments. The revision requires the root cause evaluation to consider other piping systems than the one containing the original flaws or relevant conditions. The Code Case revision is at BNCS. The Code revision is on hold until the Code Case revision is approved by the BNCS.
5. Proposed code change (IWX-1220). This action is to revise the exemption criteria to clarify that the primary and secondary sides of heat exchangers are to be handled separately, and clarify that components surrounded by exempt components are themselves exempt. Code change approved for print in next Edition/Addenda.
6. Proposed Code Case (N-663) to eliminate surface examination of Class 1 and 2 welds that are not susceptible to outside surface attack. Published in Supplement 6 of 2001 Code Cases. Good Code Case for those who are not going to implement RI-ISI or implementing only Class 1.
7. Proposed Code Case
(N-711) using risk insights to determine the minimum required examination
coverage for Class 1 and 2 piping welds.
8. Proposed Code change to perform visual examination of Regenerative and Residual Heat Exchanger in lieu of volumetric and surface examination. Very good code change for those of you who can not exempt these heat exchangers due to size and Code class. Passed WGISC. Goes to SGWCS in December.
9. Proposed Code Case and Code change to eliminate the requirement to perform successive examinations on flaws that are not service induced. Passed WGISC. Goes to SGWCS in December.
10. Proposed Code change
to address Stepped Bolting. Current code
does not address this bolting configuration.
11. Proposed Code Case (N-666), Weld Overlay Repair of Defects in Socket Welds. This Code Case allows weld reinforcement of defective socket welds. Received a negative vote from NRC at SCXI. NRC would like the Code Case to put the indication in compression with the weld overlay. The Code committee is working with the NRC to resolve the issue.
12. Revision to Supplement 11 – Qualification Requirements for Full Structural Overlaid Wrought Austenitic Piping Welds. Revise Supplement 11 to realign it with the Performance Demonstration Initiative Program and the current Relief Requests submitted by utilities. The revision better defines thickness tolerances, use of alternative flaws, application of grading units, flaw distribution, depth sizing, and procedure qualification requirements. Passed SCXI. Goes to Standards Committee.
13. Revision to IWA-2316 and IWA-2317, Alternative Qualifications for VT-2 and VT-3 Examination Personnel. Code paragraphs revised to address NRC limitations. IWA-2316 was revised to limit its use to personnel performing system leakage or hydrostatic tests. IWA-2317 was revised to require written tests for initial qualification and every 3 years thereafter. Passed SCXI. Goes to Standards Committee.
Note: To expedite the Code Inquiry process, all inquiries must be received
by the ASME office (
The following Requirement Inquires was approved.
1. Q. Is it a requirement of Examination Category B-G-1, Item No. B6.40, and Footnote 2, that reactor vessel flange threads be examined when the head to flange connection is disassembled, and the studs remain in place?
2. Q. When an automatic welding process is to be used for heat exchanger tube plugging and the welding operators are to be qualified in accordance with IWA-4712.2(b), do the requirements of IWA-4712.2(b)(3), or any other parts of IWA-4712.2(b), make position an essential variable to be considered as part of the conditions to be simulated for the welding operator?
The following Intent Inquiries was approved by SCXI. (Note 1: Typically Intent Inquires require approval of SCXI members, and need an accompanying code change. Note 2: Occasionally, Requirement Inquires goes to SCXI because the inquiry did not get a unanimous vote at Inquiry Session.).
No intent inquires was discussed.