FAST NEUTRON DOSIMETER FOR HIGH TEMPERATURE OPERATION BY MEASUREMENT OF THE AMOUNT OF CESIUM 137 FORMED FROM A THORIUM WIRE

Patent · Tue Mar 17 00:00:00 EST 1964

OSTI ID:4114217

McCune, D A

A method and device for measurement of integrated fast neutron flux in the presence of a large thermal neutron field are described. The device comprises a thorium wire surrounded by a thermal neutron attenuator that is, in turn, enclosed by heat-resistant material. The method consists of irradiating the device in a neutron field whereby neutrons with energies in excess of 1.1 Mev cause fast fissions in the thorium, then removing the thorium wire, separating the cesium-137 fission product by chemical means from the thorium, and finally counting the radioactivity of the cesium to determine the number of fissions which have occurred so that the integrated fast flux may be obtained. (AEC)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-012496
• Assignee: U.S. Atomic Energy Commission
• Patent Number(s): US 3125678
• OSTI ID: 4114217
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-64
• Country of Publication: United States
• Language: English

Related Subjects

INSTRUMENTATION
ABSORPTION
CESIUM 137
CHEMICAL REACTIONS
COATING
COUNTERS
DOSEMETERS
ENERGY
FAST NEUTRONS
FISSION
HIGH TEMPERATURE
IRRADIATION
NEUTRON DETECTION
NEUTRON FLUX
QUANTITY RATIO
RADIOACTIVITY
SEPARATION PROCESSES
THERMAL NEUTRONS
THORIUM
WIRES