Non-Destructive Spent Fuel Characterization with Semi-Conducting Gallium Arsinde Neutron Imaging Arrays
High resistivity bulk grown GaAs has been used to produce thermal neutron imaging devices for use in neutron radiography and characterizing burnup in spent fuel. The basic scheme utilizes a portable Sb/Be source for monoenergetic (24 keV) neutron radiation source coupled to an Fe filter with a radiation hard B-coated pixellated GaAs detector array as the primary neutron detector. The coated neutron detectors have been tested for efficiency and radiation hardness in order to determine their fitness for the harsh environments imposed by spent fuel. Theoretical and experimental results are presented, showing detector radiation hardness, expected detection efficiency and the spatial resolution from such a scheme. A variety of advanced neutron detector designs have been explored, with experimental results achieving 13% thermal neutron detection efficiency while projecting the possibility of over 30% thermal neutron detection efficiency.
- Research Organization:
- The Regents of the University of Michigan, DRDA (US)
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- FG07-98ID13633
- OSTI ID:
- 793621
- Report Number(s):
- DOE/ID/13633; TRN: US0201029
- Resource Relation:
- Other Information: PBD: 30 Jan 2002
- Country of Publication:
- United States
- Language:
- English
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