Licensees shall, when determining the dose from airborne radioactive material, include the contribution to the deep-dose equivalent, lens dose equivalent, and shallow-dose equivalent from external exposure to the radioactive cloud (see appendix B to part 20, footnotes 1 and 2).
Note:
Airborne radioactivity measurements and DAC values should not be used as the primary means to assess the deep-dose equivalent when the airborne radioactive material includes radionuclides other than noble gases or if the cloud of airborne radioactive material is not relatively uniform. The determination of the deep-dose equivalent to an individual should be based upon measurements using instruments or individual monitoring devices.
[56 FR 23396, May 21, 1991, as amended at 60 FR 20185, Apr. 25, 1995; 63 FR 39482, July 23, 1998]
authority: Atomic Energy Act of 1954, secs. 11, 53, 63, 65, 81, 103, 104, 161, 170H, 182, 186, 223, 234, 274, 1701 (
42 U.S.C. 2014,
2073,
2093,
2095,
2111,
2133,
2134,
2201,
2210h,
2232,
2236,
2273,
2282,
2021,
2297f; Energy Reorganization Act of 1974, secs. 201, 202 (
42 U.S.C. 5841,
5842; Low-Level Radioactive Waste Policy Amendments Act of 1985, sec. 2 (
42 U.S.C. 2021b);
44 U.S.C. 3504 note
cite as: 10 CFR 20.1203