ML040050059
| ML040050059 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/04/2002 |
| From: | Wong S Office of Nuclear Reactor Regulation |
| To: | Troy Pruett Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0358 | |
| Download: ML040050059 (1) | |
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JTro Pruett - Re: ACTION REQUIRED: ANO Fire PRA CaIcs
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I Troy Pruett - Re: ACTION REQUIRED: ANO Fire PRA Caics Page 11 15 From:
See-Meng Wong} AUZA-To:
Pruett, Troy Date:
Fri, Oct 4, 2002 3:38 PM
Subject:
Re: ACTION REQUIRED: ANO Fire PRA CaIcs Troy; Lili blew the opportunity for me to go over this with you at Cajunland. Here are my comments:
- 1. ANO Matrix. We need to state clearly the basis for selecting IE-3 as the criterion for screening out the other zones. A sentence or two will suffice.
- 2. Human Reliability Screening Analysis. The writeup is good.
Minor edits: In assumption 2, "symptomatic response of operators fire instead of a having......... "should be ".operators to a fire instead of having....... "? The headline for the last table should be "Task Failure Probability With Adequate Procedures"? The values in Action Failure Probability column in last table are inconsistent with those presented in the preceding table.
- 3. Sensitivity Analysis.
(a) In the 2nd last line of 2nd paragraph, "HEP values of 26E-2 for EFW...." must be a typo?
(b) As written, the 4th paragraph would be confusing the SERP panel. We need to explain the purpose of the sensitivity analyses, and which of the sensitivity analysis cases show the significant influences (or impacts) of revised HEP values. We need to highlight the predominant cases, and leave the detailed table to another Appendix.
- 4. SERP Worksheet. Good writeup. Do not have any comment to improve further.
- 5. CALC DATA.xIs. I do not understand how you got zero values under the CDF column. It is not clear to the reader how the delta CDF is obtained. The delta CDF for the performance deficiency is the risk change of the non-conforming case (with severity factor applied) from the conforming case (without severity factor applied).
I am on travel from Sunday, 10/6 to Thursday, 10/10 at PSA'02 Conference, Detroit. I will be back in my workstation on Friday, 10/11 if you want to talk to finalize the package.
See-Meng.
>>> Troy Pruett 09/24/02 04:46PM A>>
ALL OF THE ATTACHED FILES ARE DRAFT Please see the attached files. I had the licensee complete several "sensitivity " cases. Please let me know what you think ASAP.
Start with the SERP worksheet, then sensitivity analyses, fire HRA, ano matrix, and the calc data.
Troy Pruett 817-860-8182