computation in a "typical" harbor of poor flushing characteristics; 

 equations 6, 7, and 10 become 



(11) s (t) = 6.4 X 103 — 



(12) t = 0.80 X 102 



ppc 



ppc 



(13) N < 



9.5 X 1012 1.2 X lO^l 



3/2 



X t 



ppc 



ppc 



\ ppc/ 



where Spp^, and SQ(t) are expressed in |J,c/ml, M in curies, t and t 

 in sees, and N in discharges per month. ■ 



An inspection of Tables 3 and 5 reveals that most of the signifi- 

 cant isotopes in the primary coolant have ppc values for coastal water 

 between the values 10"^ |ic/ml and 10"9 |j,c/ml. Table 7 presents, for 

 this range of ppc values, some sample computations of the time (tppc) 

 for the maximum concentration resulting from a single discharge of M 

 curies to be reduced to the ppc value for the environment, and the per- 

 missible number of such discharges, N, per month, for the "typical" 

 harbor described above. The marine locale is considered unsuitable 

 as a receiver of any discharge for w^hich the value of N is less than 

 1.0 per month. Thus, for this sample situation, it would be considered 

 unsafe to introduce a single discharge in which the ratio M/spp<- 



TABLE 7 



Sample computations for a "typical" small harbor of poor flushing 

 characteristics, giving the time (tp ) for the maximum concentra- 

 tion resulting from a single discharge of M curies to be reduced to 

 the ppc value for the environment (s ), and the permissible num- 

 ber of such discharges per month (N) for various values of s in 

 [ic/ml. 



M, in curies for 



35 



