contaminated expendable tools, glassware, etc., which would be packaged 

 before discharge. The liquid effluent will contain low concentrations of 

 radioactive corrosion products together with very much lower concentra- 

 tions of fission products. The ion exchange resins will contain consid- 

 erably higher activities of these same materials. 



The following subdivisions of the marine environment are con- 

 sidered: 



(1) harbors, estuaries, and coastal waters out to two nniles from 

 the shoreline; 



(2) the coastal area between 2 miles and 12 miles from the coastline; 



(3) the outer continental shelf, extending from 12 miles offshore 

 outward to the 200 fathom depth contour; 



(4) the open sea, here considered to comprise those ocean areas 

 more than 12 miles from shore having depths greater than 200 fathoms. 



For the last two categories, a further distinction is made between 

 fishing areas and areas which do not contribute materially or directly 

 to the commercial harvest of sea food. 



On the basis of reports dealing with the U.S.S. NAUTILUS and the 

 proposed N.S. SAVANNAH, a list is made of isotopes with half lives 

 longer than 6 hours which are likely to occur in significant quantities 

 in the primary coolant and the ion exchange resins of marine pressur- 

 ized water reactors. For each of these isotopes the partial permissible 

 concentrations (ppc's) in seafood and in the marine environment are de- 

 termined for each of the above listed subdivisions of the environnnent. 

 Assuming that the relative proportions of the various significant isotopes 

 in the wastes do not vary greatly, a weighted mean ppc value for the va- 

 rious subdivisions of the marine environment, for each type of waste, is 

 determined. The relative compositions of the wastes predicted for the 

 SAVANNAH and observed for the NAUTILUS differ somewhat, and hence 

 a different weighted mean ppc value is determined for the primary cool- 

 ant and for the ion exchange resins, for each of these two types of ship. 



The predicted nature and quantity of the potential wastes from the 

 SAVANNAH, and the observed nature and quantity of the wastes from the 

 NAUTILUS, are utilized in arriving at the conclusions and recommenda- 

 tions presented here. A similar evaluation can be made for any potential 

 waste of known relative composition, by use of the appropriate weighted 



