Design of the second radiation laboratory and results of dose rate measurement

Journal Article · Fri Jul 15 04:00:00 EDT 1960 · Tokyo Kogyo Shikensho Hokoku

OSTI ID:4135188

Tomoda, Y.; Hamashima, M.; Takehisa, M.

The first radiation laboratory was built about two years ago; its irradiator was installed with a 274-curie Co/sup 60/ source, which has decayed to a present value of about 200 curies. In the new laboratory the irradiator has a Co/sup 60/ source of about 2000 curies, but it can be used safely with a Co/sup 60/ source up to 3000 curies. These two laboratories are used to study effects of radiation on organic reactions, such as polymerization of olefins under high pressure, chlorination, etc., and also the effects on catalysts and others. The fundamental calculating scheme for the design of the laboratory and irradiator is discussed. Results on the determination of the dose-rate distribution of gammarays in the laboratory under working condition are given. The radiation laboratory was designed on the basis of the following requirements: Permissible leak dose rate of gamma rays should not exceed 0.1 mr/hr in any place around the laboratory. A sample up to 100 mm in diameter and 200 mm in length should be able to be irradiated under dose rate of 10/sup 5/ r/hr. To measure the dose- rate distribution, Victoreen dosimeters (Radooon), chemical dosimeters (Fricke's solution), and photographic methode (photographic emulsion) were used. The dose rate was measured at 2.7 x 10/sup 5/ rad/hr in August 1959. (auth)

• NSA Number: NSA-15-000004
• OSTI ID: 4135188
• Journal Information: Tokyo Kogyo Shikensho Hokoku, Journal Name: Tokyo Kogyo Shikensho Hokoku Vol. 55
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ALKENES
CATALYSIS
CHLORINATION
COBALT 60
DOSEMETERS
GAMMA RADIATION
IRRADIATION
LABORATORY EQUIPMENT
MEASURED VALUES
POLYMERIZATION
RADIATION CHEMISTRY
RADIATION DOSES
RADIATION SOURCES
RADIATIONS
RADIOCHEMISTRY
SAFETY