Development of a new measurement method using a portable radiation portal monitor for vehicles to enhance contamination screening efficiency

Hiraoka, Hirokazu; Kawasaki, Kohei*; Kimura, Masanori; Saito, Shota; Ezaki, Iwao*; Kameda, Shuji*; Togawa, Orihiko

Nihon Genshiryoku Gakkai Wabun Rombunshi (Internet), 25(3), p.111 - 121, 2026/08

https://doi.org/10.3327/taesj.J25.007

A method to enable the simultaneous inspection of tires and the wiper area using a portable radiationportal monitor is being developed to improve the efficiency of vehicle inspection during contaminationscreening. To achieve this, we devised an approach to identify whether contamination is located on the tires orin the wiper area. We designed an L-shaped measurement configuration, where detectors are positionedhorizontally near the ground and vertically upright. An identification approach based on this L-shapedconfiguration was evaluated using Monte Carlo simulations. The results showed that the magnitude relation ofcounts measured by the horizontal and vertical detectors varies depending on whether the point source islocated on the tires or in the wiper area. We examined an identification method that utilizes this relationshipto determine the contaminated location. Next, we conducted measurements using a portal monitor (GammaPole, manufactured by Chiyoda Technol) and attempted to identify the contaminated location by the L-shapedmeasurement method. As a result, in the experiment simulating tire contamination, all 30 measurementscorrectly identified the tires as the contaminated location. In contrast, in the experiment simulating wipercontamination, 29 out of 30 measurements correctly identified the wiper area.

Development of integrated containment and surveillance system for fast critical facility FCA; Portal and penetration monitors

Mukaiyama, Takehiko; Ogawa, Hironobu;

JAERI-Research 98-001, 76 Pages, 1998/01

JAERI-Research-98-001.pdf:2.97MB

no abstracts in English

Development of FCA portal monitor

Kaku Busshitsu Kanri Senta Nyusu, 16(2), p.6 - 8, 1987/02

no abstracts in English

Development of containment and surveillance systems at the Japan Atomic Energy Research Institute(JAERI)

; ; ; ; ;

Nuclear Safeguards Technology 1986, Vol.2, p.3 - 15, 1987/00

no abstracts in English