Neutron Dosimetry for Oil-Well Logging Operations. An Intercomparison of NTA and CR-39 Dosimeters

摘要

Neutron doses recorded by NTA emulsion dosimeters and CR-39 damage track dosimeters, for a small, selected group of workers in the oil-well logging industry, have been compared over a one-year period. The same individuals wore NTA dosimeters for the normal one-month periods and CR-39 dosimeters for various periods from a month to a year. The results show that these workers often receive monthly dose equivalents between 30 mu Sv and the practical lower level of detectability (200 mu Sv) of the NTA dosimeters. However only 17% of the measured CR-39 dose equivalents totalled more than 1 mSv for the year, the maximum being 1.54 mSv. These dose equivalents are small compared with those received by many radiation workers in other industries. (Atomindex citation 20:008300)