-5- 



The category of combustible solids includes materials which are usually 

 contaminated with mixed fission products or other beta-gamma emitters having 

 half lives greater than one year. Dose rates up to 500 railliroentgens per 

 hour at the surface of any package containing these wastes have been measured^ 

 The amount of radioactivity contained in the drum packages ranges from 

 to 1000 millicuriesj the average is estimated to be neai^r 50. 



The category of other contaminated equipment includes such things as 

 laboratory equipment and used air filters. Contamination is by beta-gamma 

 emitters with half lives greater than one year. The amount of contamination 

 ranges somewhat higher than the combustibles - as high as 30 curies per drum. 

 The median figure, however, is probably closer to 200 millicuries per drum. 

 These packaged wastes can register as high as one roentgen per hour at the 

 package surface. 



The category of irradiated materials includes reactor fuel samples 

 and other reactor experiment materials and byproducts of isotope production. 



These materials have fairly high specific activities. Containing 

 packages, as can be seen in plate 1, have limited preformed spaces for 

 wastes with lead and concrete shielding taking up most of the volume of 

 the SS gallon drums. The amount of radioactivity is usually limited to 

 approximately 10 curies per package. Emitted radiation at the surface of 

 a drum may be as much as one roentgen per hour. 



The category of solidified liquids includes only low level liquid 

 wastes. No other liquid wastes are disposed of at sea by the U. S. The 

 radioactivity may be as concentrated to as much as one microcurie per 

 milliliter and a drum package may contain as many as 100 millicuries. 

 Some drums of s olidif ied liquids read as high as one roentgen per hour 

 at the surface of the drum. 



