Table 2. Relative Ranks of Hazardous Radioisotopes 
On Basis of Daily Output of On Basis of Activity in 
Chemical Processing Plant Disposal Pit 
(curies/day) (mega curies) 
Core Blanket Total Core Blanket Total 
On basis of ingestion in water (MPC),, 
sr’? sr90 sxr70 sr90 sr20 gx?0 
sr89 re Seo Nb?9 Nb?5 Nb?° 
yi3l Nb?2 z131 $789 cs 137 gr89 
Nb?25 Nb?2° Bal40 oy89 Cst37 
Bal40 pal40 eas? Bal40 
aa ole 
zi31 yi3t 
On basis of air intake (MPC), 
sr20 sr20 gr20 sr90 sr90 sr?° 
cel44 cel44 cel44 ce l44 cel44 Celé+ 
or 89 gr89 gr89 pmt47 pmt47 Pmt! 
zi3l yt zi3l Nb?> sr89 Nb?22 
y2l Nb?2 y2l gr29 cg!37 sr 89 
pal40 Ru 106 pal40 yal nb25 8137 
Nb? Nb? ¢s137 y90 y?l 
cel4l cel44 Bal40 Ry 106 Bal40 
Ry 106 y2l Ry 105 
zi31 y90 
zi31 
In the case of the critical nuclides determined from the air MPC 
values, this will be their order of hazard if they are taken into the body 
through breathing. This presupposes that these nuclides are present in the 
air breathed. If not present, certainly they will not be hazardous. 
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