Non-Destructive Spent Fuel Characterization with Semi-Conducting Gallium Arsinde Neutron Imaging Arrays

McGregor, Douglas S. ; Gersch, Holly K. ; Sanders, Jeffrey D. ; Lee, John C. ; Hammig, Mark D. ; Hartman, Michael R. ; Yang, Yong Hong ; Klann, Raymond T. ; Elzen, Brian Van Der ; Lindsay, John T. ; Simpson, Philip A.

University of Michigan. Regents.

关键词: 46 Instrumentation Related To Nuclear Science And Technology;    Gallium Arsenides;    11 Nuclear Fuel Cycle And Fuel Materials;    Neutron Radiography;    Thermal Neutrons;   

DOI  :  10.2172/793621
RP-ID  :  DOE/ID/13633
RP-ID  :  FG07-98ID13633
RP-ID  :  793621

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.