公开(公告)号：JPH0312579A

公开(公告)日：1991-01-21

申请号：JP14770089

申请日：1989-06-09

Applicant: ALOKA CO LTD

Inventor： OKADA TOICHI ,  OOWAKI SHIGEHIRO ,  OKUMA JUZO ,  SATO HIROO ,  MITO MASAYASU

IPC: G01T1/00 ,  G01T1/167

Abstract: PURPOSE:To execute the measurement in a real time and with high sensitivity by a miniature device by scavenging a radioactive material in the measuring air led into a flow part, and bringing its radiation dose to doubly integrated dosage measurement by a detector placed on the opposite side of a scavenging body. CONSTITUTION:In the inside of the upper half 100a of the body, a flow part 10 of measuring air is formed, its bottom part is closed up by a scavenging body 12 and the flow part 10 is formed like a closed case. On the other hand, in the inside of the lower half 100b connected to the upper half 100a with a hinge 24, a radiation detecting part 20 is formed, conductive packing 36 is provided on an abutting part to a frame 32 of the scavenging body 12, and a collecting electrode 22 is held in a space part. Subsequently, the scavenging body 12 is constituted by supporting a scavenging plate 30 formed by sintering a scavenging material together with clay mineral, and placing a mesh electrode 34 on the lower face. In this state, when a radioactive material in the air led into the flow part 10 is scavenged 12, the detecting part 20 partitioned and formed from the flow part 10 integrates and measures ionization charge generated by an incidence of a radiant ray, and by the doubly integrated dosage measurement for calculating the radiation dose, while scavenging the radioactive material, the measurement can be executed with high sensitivity.

公开(公告)号：JPH068860B2

公开(公告)日：1994-02-02

申请号：JP14770089

申请日：1989-06-09

Applicant: ALOKA

Inventor： OKADA TOICHI ,  OOWAKI SHIGEHIRO ,  OOKUMA JUZO ,  SATO HIROO ,  MITO MASAYASU

IPC: G01T1/00 ,  G01T1/167