US 11,867,851 B2
Large-area radioactive surface contamination measurement device using plurality of detectors
Moon Hyung Cho, Yuseong-gu (KR); Yu Ho Weon, Yuseong-gu (KR); and Hyeongjin Kim, Yuseong-gu (KR)
Assigned to Korea Hydro & Nuclear Power Co., Ltd., Gyeongju-si (KR)
Appl. No. 17/789,421
Filed by Korea Hydro & Nuclear Power Co., Ltd., Gyeongju-si (KR)
PCT Filed Dec. 11, 2020, PCT No. PCT/KR2020/018119
§ 371(c)(1), (2) Date Jun. 27, 2022,
PCT Pub. No. WO2021/141256, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 10-2020-0001145 (KR), filed on Jan. 6, 2020.
Prior Publication US 2023/0035596 A1, Feb. 2, 2023
Int. Cl. G01T 1/169 (2006.01); G01T 1/167 (2006.01); G01T 7/08 (2006.01)
CPC G01T 1/169 (2013.01) [G01T 1/167 (2013.01); G01T 7/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A large-area radioactive surface contamination measurement device, comprising:
a frame body with a plurality of holes formed;
a mover connected to the frame body to move the frame body;
a plurality of radiation detection modules, each seated in the plurality of holes to detect at least one of: alpha rays, beta rays, and gamma rays; and
a control unit for calculating a radioactive contamination location and a radioactive contamination level by comparing detection values of the plurality of radiation detection modules with each other;
wherein each radiation detection module comprises:
a counter seated in each of the plurality of holes, each counter having at least one horizontally extending seating wing for seating the counter;
a photomultiplier tube coupled to the counter; and
a channel unit mounted on the photomultiplier tube.