ML091690434

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E-mail from J. Richmond of USNRC to D. Pelton of USNRC, Regarding Oc ACRS & ASLB Transcript
ML091690434
Person / Time
Site: Oyster Creek
Issue date: 11/23/2008
From: Richmond J
Engineering Region 1 Branch 1
To: David Pelton
Office of Nuclear Reactor Regulation
References
FOIA/PA-2009-0070
Download: ML091690434 (3)


Text

Sarah Rich From: John Richmond ,

Sent: Sunday, November 23, 2008 9:56 AM To: David Pelton Cc: Richard Conte

Subject:

FW: OC ACRS & ASLB Transcript Pave, the region is still looking for some NRR input on these questions, before we Exit on Dec 3.

Any current thoughts?

Jrom: John Richmond Sent: Sunday, November 16, 2008 11:14 AM To: David Pelton; James Davis; Mary Baty Cc: Richard Conte; Doug Tifft; Michael Modes; Darrell Roberts; Marsha Gamberoni

)

Subject:

RE: OC ACRS & ASLB Transcript

'David, During AmerGen's investigation of the recently found blister in sand bed bay-1 1, their coating expert, Jon

.Cavallo, kept saying that he testified blisters were expected and were not indicative of a larger coating degradation problem. Mike Gallagher, Exelon VP for LR, also said that Exelon testified that blisters were lxpected and ok.

Michael Modes did a search of the transcripts, but was unable to locate a discussion of coating blisters, as suggested by Exelon.

A couple of relevant questions ...

1) Does the current condition of the coating, with small blisters, and with chlorinie under the coating, change the NRC's assessment of AmerGen's aging management program for the drywell epoxy coating?
2) Is there anything in the SER that might be viewed as an apparent conflict with the current condition? If there is, we ought to find it before the State of NJ or Mr. Webster does.
3) Does the presence of chlorine under the coating, constitute a new aging management effect, that has not

)been previously evaluated?

I think we need to be able to address these questions, by the time we exit (1st week of Dec ??)

Thanks John Richmond From: Michael Modes Sent: Friday, November 14, 2008 4:10 PM To: Richard Conte Cc: John Richmond

Subject:

ACRS Transcript This relevant section was from the AmerGen consultant/expert:

1 $/3

L FirMt off, the surface preparation was done in accordance with SSPS SP2 hand tool cleaning, 1 which I think gets back to Dr. Wallis' question about

'2 what was done. That removes loose rust, loose mill 3 scale, and loose coating. And loose is defined as 4 determined by moderate pressure with a dull putty 5 knife by code.

6 With that level of surface prep, which was 7 appropriate, they then applied a pre-prime, which is 8 an epoxy, which penetrates into the semi-irregular 9 shape of the substrate, and then applied two coats --

There was a prior reference indicating the first coating applied was a rust penetrating coating, intended to adhere to loose rust and strengthen it.

There also was a reference, by another expert, to the standards for VT ... that being looking for rust stains and loose epoxy, blistering, and flakes.

,From: Michael Modes Sent: Friday, November 14, 2008 3:24 PM To: Richard Conte Cc: John Richmond

Subject:

Hearing Transcript - Epoxy Coating I reviewed the ASLB hearing transcript for discussions about the epoxy coating (I will review the ACRS transcript next) as you asked. There is no discussion about blisters.

This might be of interest, given the current circumstances:

MR. HAWKINS: That would be Mr. Erickson 19 and myself performed the majority of the examinations 20 on the drywell shell in those areas and we saw .no 21 evidence of the rust seepage from anything at all. No 22 rust at all.

3 MR. ERICKSON: Scott Erickson and I concur 4 with Mr. Hawkins. I saw no evidence of any rust 25 seepage or any pin hole evidence of rust going on.

2

Received: from RICLSTRO1.nrc.gov ([148.184.99.7]) by RIMSO1.nrc.gov

([1 48.184.99.10]) with mapi; Sun, 23 Nov 2008 09:55:56 -0500 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: John Richmond <John.Richmond@nrc.gov>

To: David Pelton <David.Pelton@nrc.gov>

CC: Richard Conte <Richard.Conte@nrc.gov>

Date: Sun, 23 Nov 2008 09:55:56 -0500

Subject:

FW: OC ACRS & ASLB Transcript Thread-Topic: OC ACRS & ASLB Transcript Thread-Index: AQHJRp1Nl+dBOG41iky/rhkcKuvz1479cOVQgAr2DPA=

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