LOW LEVEL AND SOFT BETA RAY AQUEOUS WASTE MONITORING ARRANGEMENT WITH DIP TYPE THIN MICA WINDOW BETA COUNTERS

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Proc. Japan Conf. Radioisotopes

OSTI ID:4690977

Sato, H

An improved dip-type thin-mica-window G-M tube with window thickness of the order of 1.5 - 2.0 mg/cm/sup 2/ is described. The thin mica window is verified to bear up to 20 meters water pressure on a window area of 23.5 cm/sup 2/ . It is so constructed that the arrangements possess both an aqueous waste monitoring system and anticoincidence circuits of ordinary low level counters. The beta counter is equipped with two dip-type thin-mical-window G-M tubes, and these mica windows are placed face to face at 1 cm distance. When aqueous waste passes through the space between the two windows, radiation from the solution is measured. The above beta counter is surrounded by an array of G-M tubes in anti- coincidence. Instead of many G-M tubes, how-ever, the present method employs only one specially designed guard counter. The performance of the scaling instrument is not appreciably different from that of the ordinary low- level counters. The performance is summarized by the following data: residual background counting rate is 8--10 cpm, and measurable radioisotope concentrations in specific volume of solution are 5 x 10/sup -4/ mu C/cm/sup 3/ in C/sup 14/, 2 x 10/sup -4/ mu C/cm/sup 3/ in S/sup 35/, and 10/sup -6/ mu C/cm/sup 3/ in Sr/ sup 90/ + Y/sup 90/. (A.G.W.)

• Research Organization: Japan Radiation and Medical Electronics, Inc.
• NSA Number: NSA-17-030089
• OSTI ID: 4690977
• Journal Information: Proc. Japan Conf. Radioisotopes, Journal Name: Proc. Japan Conf. Radioisotopes Vol. Vol: 5th, No. 3
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

BACKGROUND
BETA PARTICLES
CIRCUITS
COINCIDENCE METHODS
DISTANCE
GEIGER-MUELLER COUNTERS
GENERAL AND MISCELLANEOUS
MICA
MONITORING
PERFORMANCE
PRESSURE
QUANTITY RATIO
RADIOISOTOPES
SCALERS
SOLUTIONS
STRONTIUM 90
SULFUR 35
THICKNESS
VOLUME
WASTE DISPOSAL
WATER
WINDOWS
YTTRIUM 90