ML053220524
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| ML053220524 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/24/2004 |
| From: | Marksberry D NRC/RES/DRAA |
| To: | David Loveless, Troy Pruett NRC Region 4 |
| References | |
| FOIA/PA-2004-0307 | |
| Download: ML053220524 (1) | |
Text
David Loveless - Palo Verde assumpUons
- The new tabled added Paae 1 ii David Loveless - Palo Verde assumptions - The new tabled added Pacie 1 1- NL3 From:
Don Marksberry To:
David Loveless; Troy Pruett Date:
Thu, Jun 24, 2004 7:36 AM
Subject:
Palo Verde assumptions - The new tabled added
- David, Here is the revised table. I fixed some typos and hi-lited new items I am checking out a potential modeling enhancement for sequence LOOP 18 concerning the 50-50 probability term (GTG-TO-BUSA and -BUSB). We may want to credit recovery (swapping GTG to the other bus for some cutsets that don't have a human error event already in the cutset---meaning no complete dependency). More to come.
Also, the sensitivity analysis is used to show modeling uncertainties. In ASP, if each sensitivity (one sensitivity analysis at a time) is within the parameter uncertainty bounds of the best estimate, then we go with the best estimate. If they don't, then we investigate the failure probability further.
6E-4 5%=
4E-5 CC:
Gary Demoss; internet: buelrf inel.gov; Joseph Minarick; Michael Cheok; Richard Rasmussen; Russell Gibbs