millirem unit for radiation measurement of absorbed dose unit for radiation measurement of absorbed dose unit for radiation measurement of absorbed dose unit for radiation measurement of absorbed dose millirem unit for radiation measurement of absorbed dose unit for radiation measurement of absorbed dose unit for radiation measurement of absorbed dose unit for radiation measurement of absorbed dose millirem level of radioactivity Measuring Radiation millirem Measuring Radiation unit for radiation measurement of absorbed dose radiation measurement unit for radiation measurement of absorbed dose Measuring Radiation unit for radiation measurement of absorbed dose Measuring Radiation Measuring Radiation unit for radiation measurement of absorbed dose dose United States Nuclear Regulatory Commission Measuring Radiation measures of exposure to radiation millirem Nuclear Regulatory Commission unit for radiation measurement of absorbed dose radiation measurement