5224 E. Indiana Beach Rd., Monticello, Indiana 47960 - (574) 583-4141. 5224 E. Indiana Beach Rd., Monticello, Indiana 47960 - (574) 583-4141.
Once the total effective dose to the embryo/fetus of the declared pregnant woman exceeds 400 mRem, she will be restricted from any further work involving occupational radiation exposure for the remainder of the pregnancy.
Quick Answer. According to the United States Nuclear Regulatory Commission, the lethal dose of radiation is in the range of 400 to 450 rem. This level of radiation causes death to around 50 percent of a population that has been exposed over a period of 30 days. Continue Reading.