Presentation is loading. Please wait.

Presentation is loading. Please wait.

Alternate approach to developing target levels Increasingly common ( NASA, NRC, USEPA ) Statistical vs deterministic inputs ( can be combined ) Addresses.

Similar presentations


Presentation on theme: "Alternate approach to developing target levels Increasingly common ( NASA, NRC, USEPA ) Statistical vs deterministic inputs ( can be combined ) Addresses."— Presentation transcript:

1 Alternate approach to developing target levels Increasingly common ( NASA, NRC, USEPA ) Statistical vs deterministic inputs ( can be combined ) Addresses uncertainty Site-specific vs default SCTL application Requires ID of appropriate input distributions Probabilistic Risk Assessment (PRA) Draft Copy Subject To Change

2 Probabilistic vs Deterministic Uses distributions vs point estimates for inputs Seeks to characterize degree of uncertainty by iterative calculations ( e.g., 100,000 events ) Avoids unintentional cumulative conservatism (2), F.S. speaks to protection against risks under “actual circumstances of exposure” Typically Tier 3 rather than Tier 1 exercise Draft Copy Subject To Change

3 Implementation Option for PRA use in Previously used in Baseline analysis Recently used in 2013 SW criteria establishment Use for revamping SCTLs would require consensus selection of applicable distributions Draft Copy Subject To Change

4 Summary Commercial software options for PRA available PRA can be combined w/deterministic elements Will require review of various distributions Applicable as a risk assessment option now May be longer term exercise for default SCTLs May not be appropriate for Tier 1 analysis Draft Copy Subject To Change


Download ppt "Alternate approach to developing target levels Increasingly common ( NASA, NRC, USEPA ) Statistical vs deterministic inputs ( can be combined ) Addresses."

Similar presentations


Ads by Google