ML12340A726
| ML12340A726 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 08/20/2012 |
| From: | Entergy Nuclear Operations |
| To: | Atomic Safety and Licensing Board Panel |
| SECY RAS | |
| References | |
| RAS 23331, 50-247-LR, 50-286-LR, ASLBP 07-858-03-LR-BD01 | |
| Download: ML12340A726 (10) | |
Text
United States Nuclear Regulatory Commission Official Hearing Exhibit Entergy Nuclear Operations, Inc.
In the Matter of:
(Indian Point Nuclear Generating Units 2 and 3)
ASLBP #: 07-858-03-LR-BD01 Docket #: 05000247 l 05000286 Exhibit #: ENT000561-00-BD01 Identified: 10/15/2012 Admitted: 10/15/2012 Withdrawn:
Rejected: Stricken:
Other: ENT000561 Submitted: August 20, 2012 Official Transcript of Proceedings NUCLEAR REGULATORY COMMISSION Title: Advisory Committee on Reactor Safeguards Plant License Renewal Subcommittee Docket Number: (n/a)
Location: Rockville, Maryland Date: Wednesday, August 18, 2010 Work Order No.: NRC-387 Pages 1-147 NEAL R. GROSS AND CO., INC.
Court Reporters and Transcribers 1323 Rhode Island Avenue, N.W.
Washington, D.C. 20005 (202) 234-4433
1 1
2 DISCLAIMER 3
4 5 UNITED STATES NUCLEAR REGULATORY COMMISSIONS 6 ADVISORY COMMITTEE ON REACTOR SAFEGUARDS 7
8 9 The contents of this transcript of the 10 proceeding of the United States Nuclear Regulatory 11 Commission Advisory Committee on Reactor Safeguards, 12 as reported herein, is a record of the discussions 13 recorded at the meeting.
14 15 This transcript has not been reviewed, 16 corrected, and edited, and it may contain 17 inaccuracies.
18 19 20 21 22 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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2 1 UNITED STATES OF AMERICA 2 NUCLEAR REGULATORY COMMISSION 3 + + + + +
4 ADVISORY COMMITTEE ON REACTOR SAFEGUARDS 5 (ACRS) 6 PLANT LICENSE RENEWAL SUBCOMMITTEE 7 KEWAUNEE POWER STATION 8 + + + + +
9 WEDNESDAY, 10 AUGUST 18, 2010 11 + + + + +
12 ROCKVILLE, MARYLAND 13 + + + + +
14 The Subcommittee met at the Nuclear 15 Regulatory Commission, Two White Flint North, Room 16 T2B1, 11545 Rockville Pike, at 8:30 a.m., Mario 17 Bonanca, Chairman, presiding.
18 SUBCOMMITTEE MEMBERS:
19 MARIO V. BONACA, Chairman 20 J. SAM ARMIJO, Member 21 CHARLES H. BROWN, Member 22 WILLIAM J. SHACK, Member 23 JOHN W. STETKAR, Member 24 25 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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3 1 DESIGNATED FEDERAL OFFICIAL:
2 GIRIJA S. SHUKLA 3 CONSULTANT:
4 JOHN J. BARTON 5 NRC STAFF:
6 BRIAN HOLIAN, NRR 7 JOHN DAILY, NRR 8 DAVID PELTON, NRR 9 BILL ROGERS 10 CAROLINE TILTON, Region III 11 DOMINION ENERGY KEWAUNEE:
12 PAUL AITKEN 13 PHIL BUKES 14 MIKE HALE 15 MARK HOTCHKISS 16 JIM RUSCH 17 BEN RODILL 18 STEVE SCASE 19 CHARLIE SORRELL 20 BILL WEBSTER 21 MICHAEL WILSON 22 DAVID WOOTEN 23 STEW YUEN 24 25 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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4 1 C-O-N-T-E-N-T-S 2 AGENDA ITEM PAGE 3 Opening Remarks 4 4 Staff Introduction 5 5 Dominion Energy/Kewaunee Presentation 8 6 NRC Staff Presentation 86 7
8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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68 1 MR. SCACE: But I think what Paul 2 indicated is, we are using that experience and 3 demonstrating the opportunistic if you would views.
4 And those are conditioned based on experience as you'd 5 expect over 40 years. So some inspection frequencies 6 we do more often, and will continue to do that. They 7 will now be documented under this new program, but we 8 are not going to start at ground zero because we have 9 a new program. So a major part of this other than 10 those we determine we haven't had sufficient 11 opportunistic opportunities, that program and that 12 experience will continue with our inspection.
13 MEMBER STETKAR: Okay, thanks, that helps 14 a little bit, thanks.
15 MR. AITKEN: Next slide.
16 So the third open item relates to steam 17 generator divider plate cracking. On this item the 18 staff requested additional information from Kewaunee 19 related to the materials of construction of the steam 20 generator divider blade, and the weather cracks in the 21 alloy 600 divider plate could propagate into the base 22 material of the channel head or into the tube sheet 23 platen.
24 If we determined that this condition was 25 likely then the staff requested that the details of an NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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69 1 inspection be provided for review. As Brian mentioned 2 the request was based in part on I believe French OE 3 with the divider plate cracking.
4 MEMBER STETKAR: Paul, before you go back 5 to the other slide, the last bullet on there, it says 6 recent - oh recent foreign operating experience. I'll 7 ask you now before you get into the materials things 8 that I don't understand anything about, you replaced 9 the steam generators in 2001. In 2006 apparently you 10 discovered a number of foreign objects in both your 11 steam generators. All I know is what I read in the 12 reports. Five foreign objects in steam generator A 13 and nine foreign objects in steam generator B.
14 This has nothing to do with the topic of 15 what you are talking about here as far as primary 16 water stress corrosion cracking, but at least the 17 steam generators - and I was going to ask you later 18 anyway so I might as well do it now. What were they?
19 Where did they come from? And do you have a loose 20 parts monitoring system?
21 MR. HANNA: Tim Hanna for the applicant.
22 We do have a loose parts monitoring system. All of 23 the parts that you are referring to were on the 24 secondary side of the steam generators, and they were 25 very small remnants for manufacturing such as weld VBs NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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70 1 or very small machine turnings. And they were either 2 removed from the steam generators or evaluated as 3 acceptable for continued service, due to the very 4 small volume of the material.
5 MEMBER STETKAR: So they were - you 6 actually determined that they had been in there since 7 the original installation?
8 MR. HANNA: That is correct.
9 MEMBER STETKAR: Okay.
10 CONSULTANT BARTON: Do they have a loose 11 parts monitoring system?
12 MEMBER STETKAR: It's not really a part.
13 Loose parts monitoring typically picks up more stuff 14 on the primary site. It's pretty messy out on the 15 secondary side.
16 MR. AITKEN: Okay, so this issue remains 17 under review by the various experts and technical 18 groups in the industry along with the NRC staff. A 19 meeting was conducted just last week between the NRC 20 and the industry where several people were trying to 21 understand the concern and ascertain what is the best 22 path to resolve this item not only for Kewaunee, but 23 for the other affected plants in the United States.
24 Dominion remains active in these forums, 25 and if there are any new requirements promulgated to NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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71 1 the industry, then Dominion will evaluate the industry 2 recommendation like the other affected plants and do 3 the right thing.
4 In response to this open item we concluded 5 that the condition described by the staff is unlikely 6 for Kewaunee for the following reasons. First, the 7 steam generators are relatively new, they're not quite 8 10 years old as Stew had mentioned. They are not 9 likely to experience cracking with this limited 10 service life.
11 Next, although the divider plates are 12 alloy 600, the divided plate assembly welds are made 13 from alloy 52/152 weld metal which is inherently 14 resistant to cracking caused by PWSCC.
15 Also we believe there is sufficient data 16 from the industry resource to support the conclusion 17 that PWSCC cracking stops when nonsusceptible 18 materials are encountered.
19 There is no U.S. or international OEs that 20 Dominion, EPRI or Westinghouse is aware of indicated 21 that cracking of the divider plates has ever 22 propagated into adjacent tube sheets of channel heads.
23 So based on the above Kewaunee concluded 24 in its response to this open item that an inspection 25 program is not warranted at this time. And that NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.
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72 1 response has been provided to the staff as of July 2 22nd, 2010, and is currently under review.
3 And our last open item, relates to the 4 ongoing issue related to buried piping and underground 5 components. First the staff requested that Kewaunee 6 identify systems with components that are in a buried 7 or an underground environment. The staff also 8 requested that we provide any updates related to 9 operating experience with the buried piping that was 10 not included in our application submittal.
11 First I'd like to address the equipment 12 located in an underground environment, which could be 13 within vaults or chases, and exposed to air on the 14 external surfaces. Kewaunee has very limited 15 equipment in this category, just a few feet of fuel 16 oil transfer piping for our diesel fuel oil system, 17 and a couple of fuel oil transfer pumps. This 18 equipment is managed for the effects of aging by the 19 visual inspections performed in accordance with the 20 external surfaces monitoring program on a period 21 frequency.
22 The remaining components that are in a 23 soil environment are managed for the effects of aging 24 by the buried piping and tank inspection program which 25 I will discuss here in the next few slides.
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