Abstract

Dose conversion coefficients from neutron fluence to operational quantities have been changed with the revision of radiation protection ordinances in Japan in April 2001. The influences of the revision were examined for the popularly used neutron dosemeters. It was shown, as a result, that the relative energy response to dose equivalent was not so changed by the revision.In addition, various dosemeters were examined on the ratios between the reading and true dose equivalent, when they were used in the various neutron fields. The percentages of the cases whose ratios were within 1-2 were 23-77% and 9-82% in 180 fields, for the representative rem counters and personal dosemeters, respectively, when the dosemeters were calibrated with 252Cf source.

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