Determining concn. of neutron-absorbing substance esp. boron - by measuring neutron drift and neutron rate from pulsed source

摘要

The medium to be analysed is irradiated from a pulsed neutron source, the neutrons emitted by this source and the neutron drift from the medium for the period in which the medium is irradiated from the source is analysed; the ratio of the quantity of neutrons emitted by the source to the quantity of drifted neutrons recorded during the period of recording is determined and from this ratio the concn. of the neutron. absorbing material determined. Used for analysing the quantity of neutron-absorbing substances in atomic, chemical and radio chemical industries. In particular for monitoring the boron concn. in the primary coolant of a nuclear reactor.