1.1 This practice covers the material and fabrication of a Beam Purity Indicator (BPI), which can be used to determine the relative quality of radiographic images produced by direct, thermal neutron radiographic examination.1.2 The values stated
ASTM
Standard Practice for Fabrication of the Neutron Radiographic Beam Purity Indicators
STD-51786
1998
2004-05-01
3