International Commission on Radiological Protection, recommendations

ICRP. 1977. International Commission on Radiological Protection. Recommendations of the International Commission on Radiological Protection. ICRP Publication 26. Vol 1. No. 3. Oxford Pergamon Press. 

International Commission on Radiological Protection, Recommendations, Pub. 60, Annals of the ICRP, 20(4), Pergamon Press, Oxford 1990... 

INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION, Recommendations of the ICRP, Publication 26, Pergamon Press, Oxford and New York (1977). 

In 1959 the International Commission on Radiological Protection (ICRP) recommended a "maximum permissible concentration of plutonium in water (MPCW) for unlimited public use" of 5x10 5 Ci/m3 ( xlO6 Bq/m3) (64). In 1979 ICRP introduced the concept of ALI ("annual limits of intake"). For 239Pu the value was set at 2xl06 Bq (or 0.9 mg) per year (35). Because man consumes about 0.5 m3 water/year, this ALI value corresponds to 4x106 Bq/m3 potable water. 

Assimilation fractions of various elements recommended by the International Commission on Radiological Protection are presented in detail by Whicker and Schultz (1982b). 

International Commission on Radiological Protection (ICRP). 1977. Recommendations of the international commission on radiological protection. ICRP Publ. 26. Ann. ICRP 1 (3) 1 -53. 

Figure 15.2 shows the distribution of levels measured in homes in the United States (Nero et al., 1986). As might be expected given the variables that affect 222Rn concentrations in homes, the concentrations vary widely, from <0.1 to >8 pCi L-1. Indeed, Alter and Oswald (1987) report a few single measurements of up to 4000 pCi L 1. For comparison, the U.S. EPA recommends levels below 4 pCi L l (150 Bq m 3), which is exceeded by about 7% of U.S. homes (Nero et al., 1986), and the International Commission on Radiological Protection (1993) recommends 5.4-16 pCi L l (200-600 Bq m-3). Typical outdoor concentrations in continental areas are 0.1-0.4 pCi L l (Nazaroff and Nero, 1988). 

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