EE = 0.75 R(1) ss (a70-2 ~ 16979-) 0.2 ; ¢ 16800.1 469-03 _ 336703) 0.3 0.1 0.2 Dunning (0u56, AEC57) also developed the concept of the one-year effective biological exposure (EBE). (Both estimated exposure and effective biological exposure were referred to as “doses,” but were calculated in units of R. “exposure.") For consistency, we will refer to both as This was done in order to account for the concept of biological repair and was intended only for application where acute somatic effects were of concern. The defining differential equation for EBE is (ERE) = SeR(t) - X(EBE) © (10) where R(t) is given by Eq. [7] and is a repair constant equal to 2n2/672 hr. There is no easy solution of Eq. 10, but a graphical solution has been provided (AEC57). A comparison of the three calculational models is shown in Table } for several different times of arrival of fallout. For most arrival times of interest, the EE is shown to be roughly half of the IE. For its estimates of exposure, the TMCEFD used the calculational model of estimated exposure for the BUSTER-JANGLE (1951), TUMBLERSNAPPER (1952), UPSHOT-KNOTHOLE. (1953), and TEAPOT (1955) series. 208 The