This paper is concerned with the establishment of thermal neutron radiograp
hy as a high accuracy measurement method. This paper reviews the present st
atus on the development of high-frame-rate neutron radiography with a stead
y thermal neutron beam and its application to multiphase flow research perf
ormed at the Research Reactor Institute of Kyoto University in collaboratio
n with the Japan Atomic Energy Research Institute. (C) 1999 Elsevier Scienc
e B.V, All rights reserved.