ML092020198

E-mail from M. Modes of USNRC to J. Richmond of USNRC, Regarding Preliminary Results of Oc Data Review

ML092020198
Person / Time
Site:	Oyster Creek
Issue date:	11/13/2008
From:	Modes M Decommissioning Branch I
To:	Richmond J Engineering Region 1 Branch 1
References
FOIA/PA-2009-0070
Download: ML092020198 (3)

Text

'1 Sarah Rich, From: Michael Modes Sent: Thursday, November 13, 2008 7:31 PM To: John Richmond

Subject:

" RE: ALERT - Preliminary Results of OC Data Review - ALERT From: John Richmond Sent: Thursday, November 13, 2008 6:04 PM To: Michael Modes Cc: Richard Conte

Subject:

RE: ALERT - Preliminary Results of OC Data Review - ALERT Michael, nicely stated. Just a couple of questions.

Did you review all 3 Tech Evals, or only focus on the one eval for the 19 arrays?

-- I focused on the 19 arrays since the other evaluations are substantially less important.

They have one more Tech Eval to finish. Will you be able to review it tomorrow, with a short turnaround time?

-- Yes.

Should we have any follow-up on the apparent differences between their MathCad method vs your Excel method?

-- No.

Were th.ir values of Skewness & Kurtosis reasonable?

-- Ye1Dut it should be noted that in one case they exceeded the limits they established as a' matter of engineering judgrn-dht. I did a sensitivity analysis (took out the skewing data numbers, one-at-a-time) and found the result still higher then the min. wall. and the calculation insensitive to the margin Thanks so much for the help.

From: Michael Modes Sent: Thursday, November 13, 2008 4:33 PM To: Richard Conte Cc: John Richmond

Subject:

RE: ALERT - Preliminary Results of OC Data Review - ALERT John pointed me to the full evaluation in the licensing database used by Amergen @ Oyster Creek.

(b)(5)

In the process however I have given the Amergen data a very thorough scrub and have found nothing questionable with the data or the calculations.

Ibh In ftia record was 0uM w FOPA '1--06

B-ed I my review, and understanding of the criteria applied, I conclude the drywell will continue to meet it's design basis and accident basis functions until the next planned outage.

From: Richard Conte Sent: Thursday, November 13, 2008 12:30 PM To: Michael Modes Cc: John Richmond

Subject:

RE: ALERT - Preliminary Results of OC Data Review - ALERT sounds like we need to get them on the horn and explain our concern and ask for a response somehow.

we obviously can't go into this startup with this uncertainty.

Richard J. Conte Chief, Engineering Branch No. 1, DRS, Reg. I L (b)(6) I Off 610-337-5183

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From: Michael Modes Sent: Thursday, November 13, 2008 11:15 AM To: Richard Conte Cc: John Richmond

Subject:

ALERT - Preliminary Results of OC Data Review - ALERT (b)(5) 2

. . V Received: from R1CLSTR01.nrc.gov ([148. 184.99.71) by RlMSOl.nrc.gov

([148.184.99.10]) with mapi; Thu, 13 Nov 2008 19:36:01 -0500 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: Michael Modes <MichaeI.Modes@nrc.gov>

To: John Richmond <John. Richmond@nrc.gov>

Date: Thu, 13 Nov 2008 19:31:15 -0500

Subject:

RE: ALERT - Preliminary Results of OC Data Review - ALERT Thread-Topic: ALERT - Preliminary Results of OC Data Review - ALERT Thread-Index:

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