FAST NEUTRON DOSIMETER FOR HIGH TEMPERATURE OPERATION BY MEASUREMENT OF THE AMOUNT OF CESIUM 137 FORMED FROM A THORIUM WIRE
Patent
·
OSTI ID:4114217
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
- Country of Publication:
- United States
- Language:
- English
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