Report of the meeting on study of traceability in neutron measurement

A meeting on the study of traceability in neutron measurement was held. The purpose of the meeting is to exchange information on the standardization of neutron measurement and the present status at various institutes. The domestic standards provided at Electrotechnical Laboratory are introduced. The neutron fields at reactor facilities are measured by foil activation, and the neutron spectra by the time of flight method. The neutron dose measurement for radiation safety is carried out with the Bonner-Ball counter. The neutron production rate by accelerators is usually measured by the associated particle method. Further problems to be studied are the establishment of the standard method of measurement for representative detectors, and the comparison among these detection methods. The investigation of the evaluation method of perturbation and the spectrum evaluation at each facility is required. The calibration of I/V detectors and the standardization of this type of detectors are also necessary. (Kato, T.)