ML021080371
| ML021080371 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/06/2002 |
| From: | Sowers G Arizona Public Service Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML021080371 (7) | |
Text
RIC 2002 Session Number W5 Risk Informed Regulation Technical Requirements March 6, 2002 Gerald Sowers PRA Section Leader Palo Verde Nuclear Generating Station
1 RIP50 Option 2 Risk Informing Special Treatment Requirements The Utility Perspective
2 Criteria For Success
Robust, Repeatable, Efficient and Stable Risk Ranking Method.
Exemption from ALL Regulatory Special Treatment Requirements for RISC-3 Structures, Systems, and Components.
Ability to Implement Over Extended Time
3 Risk Ranking Method
Experience to Date
Used at PVNGS to Review MOV Ranking
Official Pilot Ranking at Quad Cities, Wolf Creek, Surry Complete. PVNGS on 3/11
Generally Positive Experience
Robust Yes
Repeatable Yes
Efficient Not Yet
Stable Apparently
4 Exemption from ALL Special Treatment
Maximize Benefit
Need to be able to use existing plant programs for RISC-3 SSCs, without changes. For Example:
IST Use Preventive and Predictive Maintenance Programs
Procurement Use Non-Q or Augmented Q Procurement as necessary
Design Control Use as is to preserve Design Basis Functional Requirements
5 Ability To Implement Over Time
Cost Justification Will Be Difficult
Current Cost Accounting Systems Do Not Categorize Cost By Program. Cost Savings Will Be Estimates.
High Cost For Risk Ranking Activity
High Cost For Implementation Of Revised Treatment
Need 2-3 year payback time
Implement As Ranking For Each System Is Completed To Start Cost Recovery
6 Conclusion
Positive Potential Exists Need to Pursue Pilot Efforts to Conclusion
Decision To Implement 50.69 For Existing Plants Still Uncertain
What Is The Scope Of Regulations Included
How Are The Treatment Requirements For RISC-3 SSCs Defined