Risk Assessment Standardization Project
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The Risk Assessment Standardization Project (RASP) is an NRC attempt to standardize how risk is judged between plants. This is to level the approaches taken by different regions.
Common Cause
To apply common cause to a risk of a failure means to judge that the risk of another component could have failed because of what was found by a discovered condition. Eg, an EDG failed due rotor wear, so when you judge the Risk of the failure you may have a portion of that risk come from whether the other EDG fails. This may be true even if the other EDG was completely fine. The logic is that the new failure ends up changing what was assume to the risk of the other (common) component.
See also
- handbook: ML081790322, Risk Assessment Standardization Project (RASP) Handbook for Risk Assessment of Operational Events
- Significance Determination Process - concerning NRC finding significance