This standard specifies methods for measuring the radioactive surface density of articles or facilities contaminated with nuclides that emit β-rays (with a maximum energy of 0.15 MeV or more) or α-rays, by direct or indirect measurement methods.
JIS Z 4504:1993 history
2008JIS Z 4504:2008 Evaluation of surface contamination -- Beta-emitters (maximum beta energy greater than 0.15 MeV) and alpha-emitters
1993JIS Z 4504:1993 Evaluation of radioactive surface contamination