[Code of Federal Regulations]
[Title 10, Volume 4]
[Revised as of January 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR835.205]

[Page 478-479]
 
                            TITLE 10--ENERGY
 
                    CHAPTER III--DEPARTMENT OF ENERGY
 
PART 835--OCCUPATIONAL RADIATION PROTECTION--Table of Contents
 
         Subpart C--Standards for Internal and External Exposure
 
Sec. 835.205  Determination of compliance for non-uniform exposure of the skin.

    (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 
Sec. 835.202(a)(4), assessments shall be conducted as follows:
    (1) Area of skin irradiated is 100 cm\2\ or more. The non-uniform 
dose equivalent

[[Page 479]]

received during the year shall be averaged over the 100 cm\2\ 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 cm\2\ or more, but is less than 
100 cm\2\. 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 cm\2\ of skin receiving the maximum absorbed dose, D, reduced 
by the fraction f, which is the irradiated area in cm\2\ divided by 100 
cm\2\ (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 cm\2\. The non-uniform 
dose equivalent shall be averaged over the 1 cm \2\ 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.