MONTE-CARLO AIDED TREATMENTS OF THE NONLINEAR INVERSE PGNAA MEASUREMENT PROBLEM FOR VARIOUS CONTINUOUS ONLINE APPLICATIONS

A review of our work on the application of the PGNAA method as applied to five industrial applications is given. Some introductory material is first given on the importance and use of Monte Carlo simulation in this area, some comments on the place of PGNAA in elemental analysis, and a brief description of the Monte Carlo - Library Least-Squares (MC LLS) approach to the nonlinear inverse PGNAA analysis problem. Then th e applications of PGNAA are discussed for: (1) on-line bulk coal analy sis, (2) nuclear oil well logging, (3) vitrified waste, (4) the analys is of sodium and aluminum in ''green liquor'' in the presence of chlor ine, and (5) the conveyor belt sorting of aluminum alloy samples. It i s concluded that PGNAA is a rapidly emerging important new technology and measurement approach.