TABLE If Existing Exposure Guidelines for Non-Occupational Exposure that Apply to Pu-239 in Insolubie Form* Individual MPLD 1.5 (ICRP, NCRP; (0.5) Population Averade. rem/yr 0.5 MPLB 0.0016 MPC. 10742 (3x10713) uci/ml (ICRP, AEC) * (0.17) rem/yr FRC) (0.0005) uci 0.0005 (0.00017) uCi 3x1074% (10743) uci/ml The MPLD values in parentheses refer to the latest recommendations of the NCRP. The MPLS and MPCs values in parentheses correspond to the new NCRP dose recommendations. — ow Iv. Calculating the Dose Due to Insoluble Alpha-Emitters The purpose of this section is to examine the assumptions in’ the radiation standards above that are inappropriate when applied to insoluble alpha-emitting particulates such as aerosols of Pu03. The assumptions are introduced through a review of basic definitions of radiation dose and the factors used to calculate the dose. A The Dose Equivalent When an X-ray or the radiation emitted by a radionuclide passes through tissue it transfers energy to the cells in . ore ” 4 en Le af ‘, wwe . . 3. i . 4 fort . vow, FARO eee, Ea * eee Be ¥ “£ - wt Tae ‘ Nyy’ weg AP ay Aw we see am Es < Fags RR wits, eng be yw ea hy, Qe ts i} te Mas wees + snk aNd Dette DRS mut ag a geke hed s eta t aM, hye aD .3,44 No he ‘ OG Oe } ig