38. 



DR. CULLER: About two feet; they are uniformly 18 inches 

 in some places . 



DR. W. B. HEROY: What is going to be the life of that tank? 



DR. CULLER: It is at least five years, and probably longer. 



DR. HEROY: What is the rate of corrosion of the tank by the 

 nitrate solution? 



DR. CULLER: The loss is all in the welds. If you average out 

 the coils, or if you interpret inches per year to total area, it is a 

 negligible loss. 



DR. HEROY: In other words, if it were a seamless tank and 

 cooling coils were provided, the tank might last indefinitely? 



DR. CULLER: If you could get a tank with no welds you would 

 have no serious trouble that we know of. Some new material we have 

 received may have adequate resistance but it has not been tested yet. 

 The press notices say it is pretty good. 



CHAIRMAN HESS: Are there any further questions? 



DR. H. C. THOMAS: As I understand it, one of the most suc- 

 cessful ways of dealing with the moderately high level waste is by 

 pumping to the ground. The reason it is successful at Hanford, is 

 that you have a homogeneous soil with no peculiar structures, no di- 

 rect or rapid discharge to the river, and favorable ion exchange prop- 

 erties. It would be nice to do this in other places. How difficult is 

 it to survey the region immediately around the percolation crib and 

 determine the nature and extent of the changes in the soil? If you 

 pumped 100,000 gallons of active material would you get uniform and 

 predictable expansion of waste in the hole? It is possible to decide 

 that such would take place ? 



MR. LIEBERMAN: The wastes being put to the ground at Hanford 

 are not moderately high level; I would say they are relatively low level 

 wastes and the steps used in their disposal are being taken very slowly 

 and cautiously. 



Diagrammatically , the procedure is as follows: the wastes to 

 to a 30 by 30-foot crib. The crib and associated piping is 300 to 400 



