Sec. 19.8] THE SAFE HANDLING OF RADIOACTIVE MATERIALS 469 



the Interstate Commerce Commission adopted regulations covering the 

 packaging, labeling, and transportation of radioactive substances within the 

 United States. The regulations are designed to minimize the possibility 

 of radiation exposure to personnel and undeveloped photographic emulsions 

 while the active material is in transit or storage. Full details of the regula- 

 tions are given in Supplement No. 10 to I.C.C. No. 4670, ME-I.C.C. No. 4076, 

 or the Federal Register, Vol. 12, No. 220, pp. 7329-7333 [see also reference 8]. 

 The principal packing and shielding regulations governing the shipment of 

 those radioactive materials and the quantities normally required for experi- 

 mental and therapeutic uses are outlined below. 



Radioactive material, any material emitting ionizing radiation, is listed 

 as Class D poison and divided into three groups: 



Group I. "Radioactive materials that emit gamma rays only or both 

 gamma and electrically charged corpuscular rays." Each outside container 

 must be labeled with a properly executed red label, as shown in Fig. 121. 



Group II. "Radioactive materials that emit neutrons and either or both 

 the types of radiation characteristic of group T materials." Each outside 

 container must be labeled with a properly executed red label, as shown in 

 Fig. 121. 



HANDLE CAREFULLY 



RADIOACTIVE MATERIAL 

 EMITTING CORPUSCULAR RAYS ONLY 



Name of contents . 



CLASS D POISON 

 Group III 



Thla Is to certify that the content* of thl» package 

 are properly described by name and are packed 

 and marked and are In proper condition for 

 transportation according to the Regula- 

 tions prescribed by the Interstate 

 Commerce Commission. 



Shipper's name required 



hereon for ship. 



ments by 



EXPRESS 



Fig. 122. Label required for outside shipping container of Group III radioactive materials. 

 Blue printing on white paper measuring 4 by 4 in. square. 



