Dose coefficients

ICRP. 1993. Age-dependent doses to members of the public from intake of radionuclides Part 2, ingestion dose coefficients. The International Commission on Radiological Protection. ICRP publication 67. New York, NY Pergamon Press. 

Silk TJ, Phipps AW, Bailey MR. 1997. Effects on dose coefficients for workers of recent changes in internal dosimetry. Radiat Prot Dosim 71(1) 7-21. 

Stradling GN, Hodgson SA, Hodgson A, et al. 1998. Dose coefficients and assessment of intake after inhalation of contaminated dusts from Palomares. Radiat Prot Dosim 79(1/4) 179-182. 

The external dose to an inadvertent intruder who is assumed to be exposed to uncovered waste for a period of 1,000 h at the time of facility closure can be estimated as follows. For a 137Cs source assumed to be uniformly distributed in surface soil with its decay product 137mBa in activity equilibrium, and taking into account the decay branching fraction of 0.946 (Kocher, 1981), the external dose rate per unit concentration is 2.9 X 10 11 Sv s 1 per Bq g 1 (Eckerman and Ryman, 1993). Multiplying this external dose coefficient by the assumed concentration of 137Cs (4.8 Bqg ) and exposure time (1,000 h) gives a total dose for the assumed scenario of 5 X 10 4 Sv. 

ECKERMAN, K.F. and RYMAN, J.C. (1993). Dose Coefficients for External Exposure to Radionuclides Distributed in Air, Water, and Soil, Federal Guidance Report No. 12, U.S. Environmental Protection Agency Report... 

ICRP (1996). International Commission on Radiological Protection. Age-Dependent Doses to Members of the Public from Intakes of Radionuclides. Part 5 Compilation of Ingestion and Inhalation Dose Coefficients, ICRP Publication 72, Annals of the ICRP 25 (3/4) (Elsevier Science, New York). 

When calculating the inhalation intake, dose coefficients and respiration intensity data (8100 m /year) for adults given in RSS-99 [6] were used. For lack of detailed data on relative concentrations of components in the inhaled air for specific NS and RC storage and basing meas, the appropriate recommendations of IAEA [7] were applied. 

Publication 68, Dose Coefficients for Intakes of Radionuclides by Workers, Group of Committee 2 of International Commission on Radiological Protection, 1995. 

Effective Dose Coefficients (e(50)) and Annual Limits on Intake (ALI) for Occupational... 

CICRP (1994) calculated inhalation dose coefficients for particles with AMAD of 1 or 5 0,m. 

ICRP. 1994b. Dose coefficients for intakes of radionuclides by workers. International Commission on Radiological Protection. Annals of the ICRP. Vol. 24(4). ICRP publication 68. 

Part 2 Ingestion Dose Coefficients, Publ. 67, Pergamon Press, Oxford. 

Harvey, R. (2003). Uncertainty of Inhalation Dose Coefficients for Representative Physical and Chemical Forms of f. University of Michigan, Ann Arbor, MI (Michigan). 

Find the skin dose, D, from Equation 2. The dosing coefficient k. Is crop (and work practice) specific, and may also be affected by residue penetration through clothing worn In different regions. Table II provides a summary of known and extrapolated values of k,. For practical purposes In our example, let k =500o cm /hr and t=8 hours, the nominal U.S. customary workday, even though in any given situation It may be more or less. 

Table II. Summary of K. dosing coefficient values (cm /hr) to predict harvester dose mg/hr from residue ug/cm based on projected leaf area (ref. ) or total lc af area (ref, 13)...

DRCj bm effective dose coefficient for submersion in Sv Bq -s m (or skin dose coefficient for submersion — not listed), and C is a conversion factor that determines the units for Qg. 

As in the case of the 1985 edition of the Regulations, no consideration was given to the chemical form or chemical properties of radionuclides. However, in the determination of values the most restrictive of the dose coefficients recommended by the ICRP [1.8] were used. 

The evaluation of inhalation intakes is now in terms of the effective dose and based on the dose coefficients from the Basic Safety Standards [1.10] and ICRP Publication 68 [1.9],... 

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