APMP comparison for the calibration of ambient dose equivalent meters in ISO neutron reference fields—APMP.RI(III)-S1

Abstract

The comparison for the calibration of ambient dose equivalent meter was organized by TCRI of APMP. Seven laboratories (ARPANSA, BARC, INER, KRISS, NIM, NMIJ, and VNIIM) participated in the comparison exercise. Two moderator-type neutron ambient dose equivalent meters (one cylindrical and the other spherical) were circulated and calibrated in ISO standard neutron fields of 252Cf, 241Am-Be, and D2O moderated 252Cf sources. The stability of the transfer instruments was checked by the pilot lab (KRISS) between the measurements of two successive participants. Some outliers exist in each measurement set and the weighted means of all measurement results are not adequate as a reference value because of the large chi-square values. The median was used to calculate the reference value.Main text.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).