Next Generation Nuclear Plant Phenomena Identification and Ranking Tables (PIRTs) Volume 2: Accident and Thermal Fluids Analysis PIRTs
作者： Sydney J Ball , M. Corradini , Stephen Eugene Fisher , R. Gauntt , G. Geffraye
DOI: 10.2172/1001274
关键词: Next Generation Nuclear Plant 、 Physics 、 Thermal fluids 、 Mechanical engineering 、 Plenum space 、 Scram 、 Nuclear engineering 、 Reactor pressure vessel 、 Heat transfer 、 Heat exchanger 、 Coolant
摘要: An accident, thermal fluids, and reactor physics phenomena identification ranking process was conducted by a panel of experts on the next generation nuclear plant (NGNP) design (consideration given to both pebble-bed prismatic gas-cooled configurations). Safety-relevant phenomena, importance, knowledge base were assessed for following event classes: (1) normal operation (including some aspects), (2) general loss forced circulation (G-LOFC), (3) pressurized loss-of-forced (P-LOFC), (4) depressurized (D-LOFC), (5) air ingress (following D-LOFC), (6) reactivity transients - including anticipated without scram (ATWS), (7) processes coupled via intermediate heat exchanger (IHX) (IHX failure with molten salt), (8) steam/water ingress. The panel's judgment importance phenomenon (or process) based effect it had one or more figures merit evaluation criteria. These included public worker dose, fuel failure, primary (and other safety) system integrity. major concern that identified categorized as high combined medium low follow: core coolant bypass flows (normal operation), power/flux profiles outlet plenum reactivity-temperature feedback coefficients high-plutonium-content cores andmore » accidents), fission product release related transport silver (6)emissivity aspects vessel cavity cooling transfer (8)convection/radiation heating upper area (P-LOFC).« less
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