[3F08-11] Radiation (Radioactivity) Measurement and Dosimetry 2

[3F09] Development of thyroid dose monitoring system using gamma-ray spectrometers

Fabrication of the monitor and development of the measurement procedure

*Yoshihiko Tanimura¹, Sho Nishino¹, Hiroshi Yoshitomi¹, Masa Takahashi¹ (1. JAEA)

Keywords:Thyroid, Radio iodine, Internal exposure, CdZnTe semiconductor detector, LaBr3(Ce) scintillation detector

A portable thyroid dose monitoring system using gamma-ray spectrometers has been developed in order to assess the equivalent dose to the thyroid for workers and members of the public in a high dose rate environment at an early stage after a nuclear accident. The developed monitor consists of a couple of spectrometers and a detector shield. It was characterized using our gamma-ray calibration fields which simulated the high dose rate environment.