A general evaluation methodology development and application process (EMDAP) paradigm is described for the resolution of\r\nsevere accident safety issues. For the broader objective of complete and comprehensive design validation, severe accident safety\r\nissues are resolved by demonstrating comprehensive severe-accident-related engineering through applicable testing programs,\r\nprocess studies demonstrating certain deterministic elements, probabilistic risk assessment, and severe accident management\r\nguidelines. The basic framework described in this paper extends the top-down, bottom-up strategy described in the U.S Nuclear\r\nRegulatory Commission Regulatory Guide 1.203 to severe accident evaluations addressing U.S. NRC expectation for plant design\r\ncertification applications.
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