RELATION BETWEEN INFINITE “DOSE” EXPOSURE AND ESTIMATED “DOSE” (EXPOSURE)_ a © Depends upon time ofarrival, a @ Factors that lowerinfinite ‘‘dose”’: Fora=1hr: Shielding Weathering Time Product 0.75 0.84 0.95 0.60 0.79 0.93 0.55. 0.76 0.92 }®#&«0.52 a=4hr: 0.75. a=8hr: 0.75 * LRA-& as