' of hi,,.. -pacifie activity in his lungs. " At the same hearing, -in response 5 @ to the committee's inquiry about priorities in basic research on the biolo- gical effects of radiation, Dr. M. Eisenbud, then Director of the New York City Environmental Protection Administration, in part replied, "For some reason or other the particle problem has not come upon us in quite a little while, but it probably will one of these days. We are not much further along on the basic question of whethera given amonnt’ af energy doliverca to a progressively smaller and smaller volume oftissue is better or worse This is another way of asking the question of how you In the context of his commentit is interesting to refer to the ¢ ~ National Academy of Sciénces, National Research Council report of 1961 on the Effects of Inhaled Radioactive Particles (U.S. NAS.NRC. 1961). The first sentence reads, "fhe potential hazard due to airborne radioactive particulates is probably the least understood of the hazards associated. with atemic weapons testis, production of racioelements, and the expanding . . . : ‘ Use of nuclear . energy for power production." A decade lator that state- ~~ _ mem as stil valid. Finaily let me quote Drs. Sanders, Yhompsen, and es aeom 5+ ee at + cee me CE Met cel te petals He was correct: the problem has come_up again. eo employ, 8 calculate the dose when you inhale a single particle. " (Bisenbud, M., 1970}. ogeqe ‘ for the recipient. wena - - 7 riomeee ticles and the uncertainty of the risk to a man who carries sucha particle oe hl Peer te wR Bd Od TR Bie hRekles ES Bich AOR tlre bh MiebthBPhn tity LOESACA SLOG LTlaictsUe naa len ahi lh ol MiPeae D ML PlA teal ing we) OlatheOe he LGN glenn Vie ED ne laa? oo ere bt = ee oe see om ag. + olen een we ee ee SOF we seek Seren 6 ees ee Ee wee oe eS SE NSeS GRRE SE ee =e es Oe ee i ee ee ee ae oe gee .. ee eee wee ee ee - * - and Tamplin have pointed out recently tue problerns of plutonium-239 par- cee eee * the basic research studies of the USAEC are so important. D.P. Geesaman we ee me This is why some of ~~ et can provide a coherent theory of radiation damage. fap Gee ee eee FMA ee see oe ae ‘understand, and there will continue to be uncertainties until health physics ee Day 61 -. (ee, i eee ooie ¢ A SRFeOeSE FPS PR EES BETPETEELTRTS PE TE Sa le A An a LEle dot) Al Oe Be ee ekgee ke ee ee ee Ci ell