ML031040241
| ML031040241 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/31/2002 |
| From: | Merschoff E NRC Region 4 |
| To: | Collins S, Dyer J, Grobe J, Holahan G, Jerrica Johnson, Sheron B Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0018 | |
| Download: ML031040241 (1) | |
Text
From:
Ellis Meachoff, C&
To:
Brian Sheron; Gary Holahan; Jim Dyer, John Grobe; Jon Johnson; Samuel Collins Date:
8/31/02 8:41AM
Subject:
Re: Davis Besse Reactor head Degradation SOP I
I answered this email once but it seems to have disappeared into the ether. So, if two versions eventually.
show up, I appologke.
I i
So, we appreciate the oppomntty to weigh in. our interest k to inform the agencfs thinking wlth our best j
thoughts on the matter as the decision is being considered.
Thanks Ellis
-Gary Holahan OW30102 12:44PM >*>
- Ellls, Jim, forwarded a copy of Ellis' s simplified SDP analysis for the Davis Besse performance deficiencies related to the Reactor Vessel Head Degradation. I must confess that I am not a fan of simpllfed PRA analysis. Rs just toa easy to miss something important and too hard to defend when challenged. I have done simplified PRAs in the past (single sequence, point estimate vs full distributions, no parameter or model uncertainty analysis...) and have usually regretted it later.
I Since we are near.the final stage of the SDP analysis, I suggest that our draft analysis be reviewed by Reg IV in addition to the currently planned NRR, RES and Reg 111 reviews. In that way we can, hopefully, develop an agency consensus around a single, final versfon that Jack Grobe can use, with confidence, as part of the 0350 process. I expect the draft SOP ma@& to be available for revfew by next week