ACS LOG 'U.S., JapaTodayBegih™” Radiation Parley Here Discussions will be he ld on various problems of ' radioactivity, including standardization of measurements and methods of decontamination, at a five-day lapan-U.S. conference on ra diobiology to open in Tokyo today. The conference at the Japan Council of Science Building in Ueno will be attended by a team of seven American experts spe- cially sent to Japan by the U.S.|. Government and 15 Japanese counterparts. « Among the American scholars will be Dr. Paul B. Pearson, chief of the biological division, biological and medical section of the U.S. Government Atomic Energy Commission. The Japanese scientists will include Prof. Kenjiro Kimura, dean of thel?, Tokyo University science department. RG 00 Hi TIRAM _1/34 Collesiccr. Box Folder __336$ _+ 2/ sO8N! the Japa- As for the tolerable limit of radioactivity if terms of drinking water, the American National Bureau of Standards (NBS) has set 22 counts a liter when: radioactive elements are unidentified and 176 counts a liter in the case of strontium 90 only. ao a lands in March. edlv set the limit in case elements are unknown at about Ret pe ea ee 396 U.S. ATOMIC ENERGY oA MMISSION facing nese people since the start of}, the American thermonuclear experiments in the Marshall is- ed monitoring is made within three days after a thermonuclear explosion, te US DOE (CHIVES question gee ae OT ce cal ee The first-day session will bef devoted to studies of the max->imum safety limit of radioactivity, the most important practi-§ But a similar standard offer- ed by the Atomic Energy Com- mission (AEC) showed ,an uncomparably wide variance from ; the NBS standard. AEC report1,000,000 counts a liter, provid- Details about these NBS and AEC figures will be reported in the conference, A simple method of analyzing 7 elements or counting the length; of days after a thermonuclear ex+. .- ° _ periment is also being sought. DOR ARCHIVES