Ne TABLE 5-2: FRC RADIATION PROTECTION GUIDES (REM/ YR) Critical Organs Individual Population in Population Group Whole Body 0.5 0.17 Bone 1.5 0.5 Bone, Alternate Guide (1)}] 0.003 pg of 226.8 in adult skeleton Bone Marrow 0.5 Gonads 0.001 pg of 226, in adult skeleton . - Thyroid (3) | 1.5 0.17 0. 17(2) 0.5 For the conditions and qualifications of this table, see Report Nos. 1 and 2 of the Federal Radiation Council (FRC). The responsibility for establishing generally applicable environmental standards was assigned to the Environmental Protection Agency in 1970, but the guides here are still generally known as FRC Radiation Protection Guides. The philosophy represented by these guides is that the dose given in the table should not be exceeded without careful consideration of the reasons for doing so, and that every effort should be made to encourage the maintenance of radiation doses as far below this guide as is practicable. NOTES: (1) The biological equivalents of the indicated amounts of substituted. 226 Ra may be (2) Actually 5 rem per human generation period, assumed to be 30 years. Nat (3) Based upon a child's thyroid weighing 2g and other factors listed in Paragraphs 2.10 to 2.14 of FRC Report No. 2. 5-8