Development of the neutron radiography facility and its installation in HANARO

HANARO neutron radiography facility has been developed to do industrial and scientific research and developments. Characterization and detailed evaluation of the NRF system after its development are indispensible information to research and application by using the system. This report is based on the results from the neutron radiography facility, installation works for the last several years from 1994 to 1997 and characterization work thereafter. This report describes the principle of neutron radiography, theoretical aspects in several parts, overall introduction of the HANARO neutron radiography facility, and discussions in each characteristics in detail. As key components of the NRF, in-pile collimator, Bi filter, L/D ratio, thermal neutron flux and its distribution in radiation active area were studied and described. In addition to these parts, several minor parts and auxiliary aspects were also mentioned. The imaging methods and characteristics in each one are described shortly and categorized, and a prototype toward the dynamic real-time imaging system, called N-TV system, is also described and evaluated.