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	臨界安全性解析	原子炉キネティクス
分野	原子核物理学	原子核物理学
系統	Process / pipeline	Process / pipeline
提唱年	1938	1942
提唱者	Otto Hahn, Fritz Strassmann	Enrico Fermi, George Westinghouse
種類	safety assessment methodology	dynamic systems analysis
原典	American National Standards Institute (2019). Nuclear Criticality Safety in Operations with Fissionable Material Outside Reactors. ANSI/ANS-8.1-19.40.	Lamarsh, J. R. (1983). Introduction to Nuclear Engineering (2nd ed.). Addison-Wesley.
別名	nuclear safety assessment, chain reaction analysis, fissile material control	neutron kinetics, power transient modeling, reactor control analysis
関連	5	5
概要	Criticality safety analysis is a systematic evaluation of fissile material systems to ensure nuclear chain reactions remain controlled, originating from Hahn and Strassmann's 1938 discovery of nuclear fission. It determines safe limits on fissile mass, concentration, geometry, and spacing using neutron transport calculations and experimental validation to prevent uncontrolled nuclear excursions in storage, processing, and transportation.	Reactor kinetics is the study of neutron population dynamics in a reactor core, originating from Fermi's first controlled chain reaction in 1942. It models power changes in response to control rod movements, temperature feedback, and accidental transients using coupled differential equations accounting for prompt and delayed neutrons, to ensure safe operation, predict transient behavior, and design control systems.