7,9,11 and 13

7. Write the chemical equation for nitric acid digestion of (a) ADU; (b) MDU; (c) SDU; and (d) triuranium octoxide. 8. Look up the equilibrium constant for the extraction of uranium by TBP. 9. How much heat must be added or removed to maintain the reduction reactor at a constant temperature? 10. Hydrogen reduces uranium trioxide according to Equation (3.8). Write the corresponding reduction reaction for each of the following oxide feeds: (a) ADU; (b) MDU; (c) SDU; and (d) triuranium octoxide. 11. How much heat must be added or removed to maintain the hydrofluorinator at a constant temperature? 12. How much heat must be added or removed to maintain the fluorinator at a constant temperature? 13. Which volatile fluorides may be formed in the fluorination process? How can these be separated from uranium hexafluoride? (Hint: What are the boiling and melting points of the various fluorides?)