Japanese scientists and government officials on March 24, I made a further offer, in behalf of the Atomic Energy Commission, to provide whatever facilities were available for evaluation of the radiological factors involved in the incident. I repeated the assurances repeated earlier by Dr. Morton that we wished sincerely to be of assistance, that our participation was not motivated (as some Japanese suggested) by the opportunities for scientific studies, and that whatever data we obtained would be turned over to the Japanese investigators to be used by them in any way they saw fit. At this point it would be desirable to list the radiological studies which had been already made by the Japanese. These studies are of interest because they indicate the extent of Japanese capabilities in this field, and define the extent to which our facilities would be helpful to the Japanese. (1) Using a Cutie Pie, they measured the radioactivity of the Fukuryu Marue These data appear completely satisfactory and prove to be in good agreement with measurements made with American calibrated equipment. (2) They measured radioactivity of the fish and fishermen, using portable survey equipment, However, their equipment was not calibrated and their data were given in counts per minute as determined by the original factory calibration. (3) They determined that the ash recovered from the vessel was (4) They completed a qualitative radiochemical analysis of the ash radioactive using an end window GM tube and scaler. Their counting system was not calibrated and they reported counts per minute with no knowledge of the factor required to convert their data to standard units. and reported the following: Sr 89, Y91, Zr95, Nb95m, Nb95, RulO3, Rul06, Rh106, Sb127, Tel32, 1131, 1132, BallO, LalhO, Cell, Celik. (More recently they have completed a semi-quantitave analysis for a few isotopes). (S) They had scanned the bodies of the fishermen with a GM probe. (6) They had administered a duse of ash to 1 mouse, as described earlier, j Vesiasstfied DOD DIR 200,10 (7) Using an imersion type GM tube, they had demonstrated radio— activity in the urine of 3 fishermen. As before, their equipment was not calibrated and the absolute activity could not be determined. With this as the status of their investigation at the time of oy arrival, and following several hours during which I acquainted the Japanese with our experience in this field, I offered the following services to them: (1) 2 zs Complete radiochemical analysis of 2h hour urine collections from #9§ all patients. In view of the importance of this analysis in evaluating the status of the patients, I urged that these samples be furnished immediately and assured them that in one week it would be possible to give them a report for the constituents of principal biological importance, I explained the need for serial samples and suggested that collections be made at weekly intervals. They seemed anxious to accept this service. “ 5 & és Oo 9% G