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ASME Section XI Meeting Notes - February 2002

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Introduction

Prepared By: Dajun Song

Company: Progress Energy

Meeting Dates: February 25 - 28, 2002

Meeting Location: Los Angeles, California

 

Meeting Notes

General Announcements

1. Next Section XI meeting is in Colorado Springs, CO. The Broadmoor (800) 634-7711. $199.00/night plus $14/day for gratuity (04/29/02 – 05/03/02). Another option is to stay at a near by Sheraton Hotel for approximately $69/night. Please make your reservations as soon as you can.

2. NRC Report

- All mail going to NRC has been delayed up to 3 months, because the mail goes through Ohio (due to anthrax).

- IST/NRC Symposium in Washington, DC on 7/15/02 – 7/17/02.

3. Jack Spanner Jr. has volunteered to chair the ISI/NRC Symposium.

4. New Task Group on Containment RBI is forming. Need volunteers. Mr. Henry Stevens of EPRI is going to be the chairman.

5. Within the next year, the Code Committee will start updating Division 2 of ASME XI. Division 2 is Rules for Inspection and Testing of Components of Gas-Cooled Plants. This is due to interest in Pebble Bed Modular Reactor. Looking for Volunteers.

6. SC XI has formed a TG to codify examination requirements for CRDM head penetrations.

7. In the future, there will be 1 Code Edition and 2 Code Addendum.

8. The Main Committee will now be called Standards Committee.

9. ASME Web site. Password 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

SG – Subgroup

SC XI – Subcommittee Section XI

MC – Main 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";

TGISIO – 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

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. The TG reviewed two (Section III and draft Section XI) code cases. Section III code case recently received five MC negatives. All of the comments have been addressed, and will be presented at next MC meeting. A major difference between III and XI code cases is Section III requires an automated system to perform the exam. TG provided additional comments to be forwarded Section III code case author. Draft Section XI code case will be modified and discussed at next meeting.

2. Task Group on Alloy600/182 Cracking is still working on modifying the code to address this issue (type of examination and frequency). With recent finding at Davis-Besse, things could get interesting. Stay tuned.

3. Section XI Charter has been revised to include components that are outside of Section XI boundary that is High Safety Significant (HSS).

4. 10CFR50.69 (Risk Based Regulation)
NEI has asked NRC to exempt all Low Safety Significant (LSS) components from 10CFR50.55(a) requirements. This is very significant in terms of inspection and RRM requirements. Currently, the way 50.69 Regulation is written (I think) all LSS components don’t have to meet Appendix B, EQ and Maintenance Rule requirements. Again, this is a very significant regulation. Another reason why we should embrace Risk Based technology (ISI, Snubber, IST, RRM, and Classification, etc…). One outstanding question is, what about components that are non-Q currently but becomes HSS? Do they have to meet 50.55(a)? This has not been addressed yet.

5. Proposed Code Case (N-658), Risk Informed Safety Classification for Use in Risk-Informed Repair and Replacement Activities, failed MC with one negative. MC negative was addressed, and reaffirmed through SGWCS.

6. 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.

7. WG-RBI will look at using risk-based methodology to address leak testing.

8. Repeat - 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.

9. 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. Still waiting.

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 > 11/2" and <4". 10% sample will be required. At SCXI.

11. 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. All 7 negative comments were addressed. To satisfy NRC negative, this code case limits the use to Class 1 piping to > 4". No size limit for Class 2 piping. Reaffirmed through SGWCS. Very good code case.

12. 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 May 2002 meeting, and vote at December 2002 SCXI meeting. Oh, by the way this is for only PWRs. It looks very promising.

13. Code Case N-613, Ultrasonic Examination of Full Penetration Nozzles, Examination Category B-D, Item No’s. 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.

14. Proposed Code Case, Alternative Hydrostatic Pressure Test Schedule Requirements for Class 1, 2, and 3 Systems. This code case allows utilities to perform the 10-year hydrostatic test any time within the interval, provided the test is performed in the same or earlier inspection period in each subsequent inspection interval. Passed SGWCS, but needs code change before going to SCXI.

15 Proposed changes to IWL-2510 (b) to provide requirements for additional surface examinations of tendon anchorage suspect areas. At SCXI.

16. Repeat - 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 it’s Class 2). This is an opportunity to save on dose.

17. Reaffirmed Code Case N-602 by SCXI.

18. Proposed Code Case N-660, Alternative Repair/Replacement Rules for Structures Systems Components (SSC) Classified in Accordance With Risk Informed Processes passed SCXI. Goes to MC.

Inquiry Session

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 VII-4120 that experience in nuclear applications is limited to Section XI applications?

Reply. NO.

2. Question: Is it a requirement of IWF-2200(a) or CC N-491-1, to perform a pre-service examination on supports that are disassembled and reassembled solely to support a maintenance activity and are not being adjusted as corrective measures in accordance with IWF-3000 or Code Case N-491-1, section -3000?

Reply: NO.

3. Question: Is it a requirement of IWF-2200(a) or CC N-491-1, to perform a pre-service examination on supports that are disassembled and reassembled solely to support a maintenance activity and are not being adjusted as corrective measures in accordance with IWF-3000 or Code Case N-491-1, section –3000 after a heat-up/cool-down cycle for systems that operate at a temperature greater than 200 degree F during normal plant operation?

Reply: NO.

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: If there are fewer than three items or welds to be examined in an Examination Category, is it the intent of IWE-2412 that the items or welds may be examined in any two periods, or in any one period if there is only one item or weld, in lieu of the percentage requirements of Table IWE-2412-1?

Reply: YES.


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