98 a a — In terms of our own evaluation an) of permissible levels, taking into account the time factor, we feel that still the un- certainties and the blological effects <= the uncertsinties, the watchword in terms of evaluation in this radiation field around particle acceleratora is reasonable in degree. MR, EISENBUD; Thank you very much, Mr, Chairman, I don't want to deny the committee the opportunity to ask ques= tions. . I have teen going slong at a feirly stiff pace here because of the time schedule that we have arranged. I have forty-five minutes at the end for questions, we can utilize 1t at that time or we can distribute 4t. DR. FAILLA: way you ferl best, MR, EISENBUD: Arrange it the TI prefer to wait until the end because I would like to cover the progranr, Let us put O'Brien on now, That will be a paper on Neutron Instrumentation Problems. And then we will hear from Mr, Bilatz,