10 C.F.R. § 835.205 Determination of compliance for non-uniform exposure of the skin.
Title 10 - Energy
(a) Non-uniform exposures of the skin from X-rays, beta radiation, and/or radioactive material on the skin are to be assessed as specified in this section. (b) For purposes of demonstrating compliance with §835.202(a)(4), assessments shall be conducted as follows: (1) Area of skin irradiated is 100 cm2 or more. The non-uniform dose equivalent received during the year shall be averaged over the 100 cm2 of the skin receiving the maximum dose, added to any uniform dose equivalent also received by the skin, and recorded as the shallow dose equivalent to any extremity or skin for the year. (2) Area of skin irradiated is 10 cm2 or more, but is less than 100 cm2 . The non-uniform dose equivalent (H) to the irradiated area received during the year shall be added to any uniform dose equivalent also received by the skin and recorded as the shallow dose equivalent to any extremity or skin for the year. H is the dose equivalent averaged over the 1 cm2 of skin receiving the maximum absorbed dose, D, reduced by the fraction f, which is the irradiated area in cm2 divided by 100 cm2 (i.e., H=fD). In no case shall a value of f less than 0.1 be used. (3) Area of skin irradiated is less than 10 cm2 . The non-uniform dose equivalent shall be averaged over the 1 cm2 of skin receiving the maximum dose. This dose equivalent shall: (i) Be recorded in the individual's occupational exposure history as a special entry; and (ii) Not be added to any other shallow dose equivalent to any extremity or skin recorded as the dose equivalent for the year.
Title 10: Energy
PART 835—OCCUPATIONAL RADIATION PROTECTION
Subpart C—Standards for Internal and External Exposure
§ 835.205 Determination of compliance for non-uniform exposure of the skin.
