96 This 18 a Scintillation Detector using a five inch orystal and a five inch photomultiplier based upon a Hornyak design and built in this laboratory, Next slide, please? Well, that is the end of it. should just like to say what our general I overall impressions were with respect to the thirty accelerators that we have visited and that are more or less representative of 2C0 accelerators or so in the United States, Ye do not think that there are large numbers of people being exposed ex= cessively to high level fast neutrons, As a matter of fact we think the problem is quite the other way around, At all accelerators where we maine tained film badge’ records and have done service, there's a great tendency for a very small group of technically proficient people at the accelerator site to receive the total site exposure, that is, if there are eleven people wearing film badges and technically resvonsible for exnerimentation, one will find two peorle heave received a total site exposure over a period of a couple years.