IEVref: 395-07-04 ID: Language: en Status: Standard Term: reactor time constant Synonym1: reactor period Synonym2: Synonym3: Symbol: Definition: time required for the neutron flux in a nuclear reactor to change by a factor e equal to 2,718..., when the neutron flux is rising or falling exponentially Note 1 to entry: Doubling time is the time for the physical power to be multiplied by two, with the other parameters assumed unchanged. Note 2 to entry: This entry was numbered 393-15-19 in IEC 60050-393:2003. Publication date: 2014-03 Source: ISO 921:1997, definition 1026, modified Replaces: Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: