[2D14-17] Radioactive Material Inspection & Environmental Measurement

[2D15] Study of Radioactive Evaluation for Clearance Objects Inhomogeneously Stored in the Package

*Taiki Yoshii¹, Hirotaka Sakai¹, Hiroaki Tagawa², Jun Kawarabayashi² (1. Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R), 2. Tokyo City University)

Keywords:Radioactive Measurement, NaI(Tl) scintillation detector, Clearance, PHITS

To estimate the radioacitivity in the clearance objects, in many case, it is assumed that the density in the package is constant. If the nondestructive examination is available, the distribution of the clearance objects in the package may be useful to evaluate the radioactivity. Therefore, in case of the clearance objects were cables, it was studied how the radioactivity evaluation effect when the clearance objects were stored in the package uniformity or in-homogeneous.