Method and apparatus for monitoring a volume of waste for radioactive material and correcting the monitored result for geometry and attenuation

摘要

A method and apparatus is provided for monitoring a volume of waste for radioactive material and correcting the monitored result for geometry and attenuation. The method comprises providing the volume of waste in a monitoring space; providing a support, the support being provided with a plurality of detectors for radioactive material; monitoring the volume of waste for radioactive material, in one or more parts, to give a monitoring resu correcting the monitoring result for geometry and/or attenuation to give a corrected result using a correction factor, wherein the correction factor is obtained by a method comprising: providing a simulation of an equivalent volume of waste free of radioactive material in an equivalent monitoring space, with equivalent detectors; providing a known activity radioactive source at one or more positions in the volume of waste; determining the detector response to the source in a position, a comparison of the response and known activity contributing to a correction function for that equal volume, one or more such correction functions providing the correction factor. The simulation may be a computer simulation or a physical simulation.