Level 1 General PRA Methods

The following methods have been reported to EPRI as having been evaluated to determine whether they are NDMs or not. Available information on the basis for determining that a method is or is not an NDM and a summary of any completed NDM Peer Reviews are included as provided to EPRI by the party making the determination or conducting the NDM Peer Review.

Date	Title	Description	Implementing Document	Is this a “Newly Developed Method (NDM)”?	Link to NDM Decision Justification	Has a NDM Peer Review been conducted?	Link to NDM Peer Review Public Summary
Dec 2019	EDG Component Reliability Data Development	The method adds detail to the calculation methodology for converting the raw EDG performance data into component reliabilities and removes conservatism from EDG component failure rates.	PWROG-19019-NP, Rev 0	Y	Not yet available	In progress	Not yet available
Apr 2020	General Screening Criteria for Loss of Room Cooling	The method addresses support system modeling and environmental conditions impacting component availability and reliability in PRA modeling.	PWROG-19020-NP, Rev 1	Y	Section 4.1 of PWROG-19020-Rev 1	Y	PWROG-19020-Rev 1