Zee. gegsagisgeL.iuinaaeagag&kaegk 50 N-4 Part A of this Note deals with thyroid dosage relating to the Bravo event in 1954. It comprises two tables. Part B consists of a letter from Dr. W. H. Adams of Brookhafen National Laboratory to Dr. Roger Ray of DOE. It deals with the question of whether or not prolonged residence on Rongelap since 1957 hasfresulted in an increase in thyroid neoplasia. It also considers changes jn longevity and blood counts. TABLE N.4A #1 Source THYROID DOSE FROM INDIVIDUAL RADIONUCLIDES IN FALLOUT TO THE ADULT MALE ®> Half-life Per cent physical decay in 3 weeks Dos rads Internal exposure Iodine-135 6.6 bh 100% 190 Iodine-134 §3.2 min 100% 3 Iodine-133 21 2b 100% 550 Iodine-132 2.3 h 100% 7 Todine-131 8.04 d 84% 130 . Tellurium-131 30 h + 8.04 da 79% 120 Tellurium-13im 25 min + 8.04 d 84% 13 External exposure gad 190 Total dose 1203 */ Lessard et al, b/ Exposure to the fallout on Rongelap Island occurred for abouf 45 hours. (1985) The fallout fell for about 7 hours.