emma Be pe wah LT sags sae! eel . A/CONF.8/P/1045 JAPAN English A main component of the white ashes was calcium compound. Twenty-three radioactive nuclides (fission products) were detected in the white ashes: oe.1i. Sr-89, Sr-90, Y-90, Y-91, Zr-95, Nb-95m, Nb-95, Ru-103, Ru-106, Rh-106, Te-129m, Te-129, Te-152, I[-131, I-1352, Ba-140, La-140, Ce-141, Ce-144, Pr-144, Pr-143, Nd-147, Pm-147. Besides the above méntioned fission products, the following 4 radioactive elements were also confirmed: 5-35, Ca-45, U-257, Pu-239. It was also assumed that a large component of the radioactivity of the ashes would be based on the activated rare earth elements. The causes of the radiation injury of the fishermen are sup- posed to be: (1) an external exposure to the ashes, which are adhering to their skin surface (mainly by beta rays}, (2) an external exposure to their hair, clothes and boat, ete. (mainly by gamma rays) and (3) an internal eXposure to the fission produ&ts, which might enter their bodies through their skin, respiratory as well as digestive passages (beta and gamma rays). It was estimated that the dose of external exposure might be about 200 to 400 r in 2 weeks on the boat. When the fishermen came back, only the skin lesion was observed. With the lapse of time, however, the clinical pictures of blood damage had gradually come up: in 4 - 6 weeks, extreme leucopenia (around 2,000), decrease of bone marrow cells (under 50,000) and platelets (under 10,C00). Hematologically all were pan-myelophthisis. Some complained of fever and hemorrhagic signs. Aspermia was also confirmed. Hairs of the head and nape, where some amount of the falling ashes adhered, began to fall off and in 3 to 4 weeks complete epilation occurred. Since the beginning of May (in 3 months after the fishermen received the ashes), their clinical features turned generally for the better. The blood pictures also improved gradually, about the half of the fishermen showed 6,000 - 7,000 in their white blood counts. Thrombcytes increased also. The number of bone marrow cells, too, increased gradually, but quite slower. Some jaundice cases were observed from the middle of May and in the following 3 months 17 cases of jaundice out of 235 fishermen _ were reported. All fishermen, both with jaundice and without jaun- dice, were showing more or less a positive disturbance of their liver function. After 6 - 8 months all clinical features became gradually favorable. However, their clinical figures give, in general, an impression that they are rather milder, but more lasting, in comparison with those of Eiroshima or Nagasaki: cases. COPIED/DOE LANL RC -2- ro 75