Standard defects and dimensional measurements in neutron radiography. Difauts étalons et mesures dimensionelles dans la neutronographie

In 1979 a working group on neutron radiography was formed at Euratom. The purpose of this group is the standardization of neutron radiographic methods in the field of nuclear fuel. First priority was given to the development of image quality indicators and standard objects for the determination of accuracy of dimensional measurements from neutron radiographs.

For that purpose beam purity and sensitivity indicators as well as a calibration fuel pin were designed and fabricated at Rise. All the Euratom neutron radiography centers have received the above items for comparative neutron radiography. The measuring results obtained, using various measuring apparatus, will form the basis to formulate conclusicns about the best measuring methods and instruments to be used in that field.