[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR36.25]

[Page 614-615]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 36_LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS
--Table of Contents
 
      Subpart C_Design and Performance Requirements for Irradiators
 
Sec. 36.25  Shielding.

    (a) The radiation dose rate in areas that are normally occupied 
during operation of a panoramic irradiator may not exceed 0.02 
millisievert (2 millirems) per hour at any location 30 centimeters or 
more from the wall of the room when the sources are exposed. The dose 
rate must be averaged over an area not to exceed 100 square centimeters 
having no linear dimension greater than 20 cm. Areas where the radiation 
dose rate exceeds 0.02 millisievert (2 millirems) per hour must be 
locked, roped off, or posted.
    (b) The radiation dose at 30 centimeters over the edge of the pool 
of a pool irradiator may not exceed 0.02 millisievert (2 millirems) per 
hour when the sources are in the fully shielded position.
    (c) The radiation dose rate at 1 meter from the shield of a dry-
source-storage panoramic irradiator when the source is shielded may not 
exceed 0.02 millisievert (2 millirems) per hour and

[[Page 615]]

at 5 centimeters from the shield may not exceed 0.2 millisievert (20 
millirems) per hour.