Design and operational features of the low temperature fissiochemical loop

Journal Article · Fri Jun 01 04:00:00 EDT 1973 · J. Nucl. Sci. Technol. (Tokyo), v. 10, no. 6, pp. 375-384

DOI:https://doi.org/10.1080/18811248.1973.9735438· OSTI ID:4389322

Sato, S; Moriyama, N; Ikezoe, Y; Ishii, T; Hirata, M

A low-temperature in-pile loop for the irradiation of chemical reactants, especially by fission fragments, was designed, constructed, and operated successfully. The main features of the loop are briefly described: the capsule for sample irradiation, the design and performance of the helium cooling system, and safety considerations. Gaseous chemical reactants charged in an instrumented double capsule at pressures up to 20 kg/cm/sup 2/, can be irradiated in a nuclear reactor at any tempernture between +20 and --190 deg C, for periods up to 5 hr. The thermal performance of the helium cooling system was in good agreement with the design calculations. Irradiations of ethylene and other gases can be conducted at an absorbed fission fragment dose rate of about 20 Mrad/hr, which is several times larger than the background reactor radiation. Thus, chemical reaction studies by fission fragments can be safely conducted at ambient to low temperatures in this loop. (auth)

• Research Organization: Japan Atomic Energy Research Inst., Tokai
• NSA Number: NSA-29-011947
• OSTI ID: 4389322
• Journal Information: J. Nucl. Sci. Technol. (Tokyo), v. 10, no. 6, pp. 375-384, Journal Name: J. Nucl. Sci. Technol. (Tokyo), v. 10, no. 6, pp. 375-384; ISSN JNSTA
• Country of Publication: Japan
• Language: English

Related Subjects

*CHEMONUCLEAR REACTORS-- IN PILE LOOPS
FISSION FRAGMENTS
HEAT EXCHANGERS
HELIUM COOLED REACTORS
IRRADIATION
IRRADIATION CAPSULES
LOW TEMPERATURE
N77700* --Reactors--Plutonium Production
Isotope Production
Chemonuclear
Materials Testing
& Materials Processing Reactors
RADIATION CHEMISTRY
VERY LOW TEMPERATURE