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
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 ENT000561 Submitted: August 20, 2012 United States Nuclear Regulatory Commission Official Hearing Exhibit In the Matter of
- Entergy Nuclear Operations, Inc. (Indian Point Nuclear Generating Units 2 and 3)
ASLBP #:07-858-03-LR-BD01 Docket #:05000247 l 05000286 Exhibit #:
Identified:
Admitted: Withdrawn:
Rejected: Stricken: Other: ENT000561-00-BD01 10/15/2012 10/15/2012 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 1 1 DISCLAIMER 2 3 4
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 UNITED STATES NUCLEAR REGULATORY COMMISSIONS ADVISORY COMMITTEE ON REACTOR SAFEGUARDS
The contents of this transcript of the
proceeding of the United States Nuclear Regulatory
Commission Advisory Committee on Reactor Safeguards, as reported herein, is a record of the discussions
recorded at the meeting.
This transcript has not been reviewed, corrected, and edited, and it may contain
inaccuracies.
NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 2 UNITED STATES OF AMERICA 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 NUCLEAR REGULATORY COMMISSION
+ + + + + ADVISORY COMMITTEE ON REACTOR SAFEGUARDS (ACRS) PLANT LICENSE RENEWAL SUBCOMMITTEE KEWAUNEE POWER STATION
+ + + + +
WEDNESDAY, AUGUST 18, 2010
+ + + + + ROCKVILLE, MARYLAND
+ + + + + The Subcommittee met at the Nuclear
Regulatory Commission, Two White Flint North, Room
T2B1, 11545 Rockville Pike, at 8:30 a.m., Mario
Bonanca, Chairman, presiding.
SUBCOMMITTEE MEMBERS:
MARIO V. BONACA, Chairman J. SAM ARMIJO, Member CHARLES H. BROWN, Member WILLIAM J. SHACK, Member JOHN W. STETKAR, Member NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 3 DESIGNATED FEDERAL OFFICIAL:
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 GIRIJA S. SHUKLA
CONSULTANT:
JOHN J. BARTON
NRC STAFF:
BRIAN HOLIAN, NRR JOHN DAILY, NRR DAVID PELTON, NRR BILL ROGERS CAROLINE TILTON, Region III
DOMINION ENERGY KEWAUNEE:
PAUL AITKEN PHIL BUKES MIKE HALE MARK HOTCHKISS JIM RUSCH BEN RODILL STEVE SCASE CHARLIE SORRELL BILL WEBSTER MICHAEL WILSON DAVID WOOTEN STEW YUEN NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 4 C-O-N-T-E-N-T-S 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 AGENDA ITEM PAGE
Opening Remarks 4
Staff Introduction 5
Dominion Energy/Kewaunee Presentation 8
NRC Staff Presentation 86 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 68 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 MR. SCACE: But I think what Paul
indicated is, we are using that experience and demonstrating the opportunistic if you would views.
And those are conditioned based on experience as you'd
expect over 40 years. So some inspection frequencies
we do more often, and will continue to do that. They
will now be documented under this new program, but we
are not going to start at ground zero because we have
a new program. So a major part of this other than
those we determine we haven't had sufficient
opportunistic opportunities, that program and that
experience will continue with our inspection.
MEMBER STETKAR: Okay, thanks, that helps
a little bit, thanks.
MR. AITKEN: Next slide.
So the third open item relates to steam
generator divider plate cracking. On this item the
staff requested additional information from Kewaunee
related to the materials of construction of the steam
generator divider blade, and the weather cracks in the
alloy 600 divider plate could propagate into the base
material of the channel head or into the tube sheet
platen.
If we determined that this condition was
likely then the staff requested that the details of an NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 69 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 inspection be provided for review. As Brian mentioned
the request was based in part on I believe French OE
with the divider plate cracking.
MEMBER STETKAR: Paul, before you go back
to the other slide, the last bullet on there, it says
recent - oh recent foreign operating experience. I'll
ask you now before you get into the materials things
that I don't understand anything about, you replaced
the steam generators in 2001. In 2006 apparently you
discovered a number of foreign objects in both your
steam generators. All I know is what I read in the
reports. Five foreign objects in steam generator A
and nine foreign objects in steam generator B.
This has nothing to do with the topic of
what you are talking about here as far as primary
water stress corrosion cracking, but at least the
steam generators - and I was going to ask you later
anyway so I might as well do it now. What were they?
Where did they come from? And do you have a loose
parts monitoring system?
MR. HANNA: Tim Hanna for the applicant.
We do have a loose parts monitoring system. All of
the parts that you are referring to were on the
secondary side of the steam generators, and they were
very small remnants for manufacturing such as weld VBs NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 70 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 or very small machine turnings. And they were either
removed from the steam generators or evaluated as
acceptable for continued service, due to the very
small volume of the material.
MEMBER STETKAR: So they were - you
actually determined that they had been in there since
the original installation?
MR. HANNA: That is correct.
MEMBER STETKAR: Okay.
CONSULTANT BARTON: Do they have a loose
parts monitoring system?
MEMBER STETKAR: It's not really a part.
Loose parts monitoring typically picks up more stuff
on the primary site. It's pretty messy out on the
secondary side.
MR. AITKEN: Okay, so this issue remains
under review by the various experts and technical
groups in the industry along with the NRC staff. A
meeting was conducted just last week between the NRC
and the industry where several people were trying to
understand the concern and ascertain what is the best
path to resolve this item not only for Kewaunee, but
for the other affected plants in the United States.
Dominion remains active in these forums, and if there are any new requirements promulgated to NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 71 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 the industry, then Dominion will evaluate the industry
recommendation like the other affected plants and do
the right thing.
In response to this open item we concluded
that the condition described by the staff is unlikely
for Kewaunee for the following reasons. First, the
steam generators are relatively new, they're not quite
10 years old as Stew had mentioned. They are not
likely to experience cracking with this limited
service life.
Next, although the divider plates are
alloy 600, the divided plate assembly welds are made
from alloy 52/152 weld metal which is inherently
resistant to cracking caused by PWSCC.
Also we believe there is sufficient data
from the industry resource to support the conclusion
that PWSCC cracking stops when nonsusceptible
materials are encountered.
There is no U.S. or international OEs that
Dominion, EPRI or Westinghouse is aware of indicated
that cracking of the divider plates has ever
propagated into adjacent tube sheets of channel heads.
So based on the above Kewaunee concluded
in its response to this open item that an inspection
program is not warranted at this time. And that NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W. (202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com 72 1 2 3
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8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 response has been provided to the staff as of July
22 nd , 2010, and is currently under review. And our last open item, relates to the
ongoing issue related to buried piping and underground
components. First the staff requested that Kewaunee
identify systems with components that are in a buried
or an underground environment. The staff also
requested that we provide any updates related to
operating experience with the buried piping that was
not included in our application submittal.
First I'd like to address the equipment
located in an underground environment, which could be
within vaults or chases, and exposed to air on the
external surfaces. Kewaunee has very limited
equipment in this category, just a few feet of fuel
oil transfer piping for our diesel fuel oil system, and a couple of fuel oil transfer pumps. This
equipment is managed for the effects of aging by the
visual inspections performed in accordance with the
external surfaces monitoring program on a period
frequency.
The remaining components that are in a
soil environment are managed for the effects of aging
by the buried piping and tank inspection program which
I will discuss here in the next few slides.