RESULTS OF A LARGE-SCALE NEUTRON SPECTROMETRY AND DOSIMETRY COMPARISON EXERCISE AT THE CADARACHE MODERATOR ASSEMBLY

Eurados Working Group 7 recently organised a large-scale comparison of neutron spectrometry and dosimetry measurements at the IPSN/SDOS labo ratory of the CEA Cadarache Research Centre in France. A large number of participants took part with a range of instruments including spectr ometers, tissue-equivalent proportional counters, personal dosemeters, and survey instruments. The neutron field used for the exercise was a primarily low energy neutron spectrum similar to those which have bee n measured recently around nuclear facilities. This paper presents the results of the measurements and attempts to draw conclusions about th e accuracy attainable with the various devices, their advantages and d rawbacks, and potential problems.