[Code of Federal Regulations]

[Title 40, Volume 8]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR61.21]



[Page 42]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS--Table 

of Contents

 

     Subpart B_National Emission Standards for Radon Emissions From 

                        Underground Uranium Mines

 

Sec.  61.21  Definitions.



    As used in this subpart, all terms not defined here have the meaning 

given them in the Clean Air Act or subpart A of part 61. The following 

terms shall have the following specific meanings:

    (a) Active mine means an underground uranium mine which is being 

ventilated to allow workers to enter the mine for any purpose.

    (b) Effective dose equivalent means the sum of the products of the 

absorbed dose and appropriate effectiveness factors. These factors 

account for differences in biological effectiveness due to the quality 

of radiation and its distribution in the body of reference man. The unit 

of the effective dose equivalent is the rem. The method for calculating 

effective dose equivalent and the definition of reference man are 

outlined in the International Commission on Radiological Protection's 

Publication No. 26.

    (c) Underground uranium mine means a man-made underground excavation 

made for the purpose of removing material containing uranium for the 

principal purpose of recovering uranium.



[54 FR 51694, Dec. 15, 1989, as amended at 65 FR 62151, Oct. 17, 2000]