[en] The operation of Rokkasho Low Level Radioactive Waste Burial Center was commenced in December 1992, and transport of homogeneous solidified body drums to this center was started. It is mandatory that low level radioactive waste drums are checked before bring-out to assure that they conform to the burial criteria of the nation. The items of this check are seven items. In these items, radioactivity measurement is explained below. 1. Radioactivity concentration measurement. The radio of the gamma-ray discharge nuclide is measured using a high purity Ge semiconductor detector, while the gross gamma-ray dose is measured simultaneously using a plastic scintillation detector. The radioactivity of the representative nuclide is calculated from the detected nuclide component ratio and the gross gamma-ray counting rate, and in addition, the radioactivity concentration is calculated from the involved total radioactivity and weight measured value included in the waste drum analysis data. Specification. Nuclide to be measured: Co-60, Cs-137, etc. Detection lower limit value: 3.7x10^-1 Bq/g. 2. Surface contamination density and dose equivalent measurement. After the surface substance was sampled using a wiping material, measurement of this wiping material is taken using a radiation detector. For surface dose equivalent measurement, a radiation detector is directly mounted to a wiping material mounting arm, and the gamma-ray dose is measured simultaneously during wiping actions. Specification. Detection lower limit: 3.7x10^-1 Bq/cm². Surface dose rate: 10^-3 mSv/h - 10 mSv/h. (author)