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NRC proposed rule for licensing reactors authorized by DOE, DOD
Nuclear reactor designs approved by the Department of Energy or Department of Defense could get streamlined pathways through the Nuclear Regulatory Commission’s commercial licensing process should applicants wish to push the technology into the civilian sector.
A proposed rule introduced April 2 by the NRC would “improve NRC licensing review efficiency, where applicable, by explicitly establishing by regulation an additional means for reactor applicants to demonstrate the safety functions of their reactor designs, and thus, would contribute to the safe and secure use and deployment of civilian nuclear energy technologies.”
Eric V. Brown, Leonard W. Gray, D. William Tedder
Nuclear Technology | Volume 89 | Number 3 | March 1990 | Pages 328-340
Technical Paper | Chemical Processing | doi.org/10.13182/NT90-A34370
Articles are hosted by Taylor and Francis Online.
A computer model of an air-lift dissolver was developed to predict the dissolution rates for plutonium oxide (PuO2), dysprosium oxide (Dy2O3), and incinerator ash. This model combines surface kinetics with mass transfer effects to obtain overall rate expressions. The mass transfer coefficients are related to several major process variables. These predictions were compared with experimental tests at Savannah River Laboratory using simulated ash and Dy2O3 as a surrogate for refractory PuO2. The present version of the model overestimates the residual fluoride concentrations in dissolver effluents by ∼50% for several reasons, which are discussed. The minimum air sparge rates to achieve liquid circulation in the dissolver are predicted quite well, within ± 6%. The nonvolatile dissolved solids are estimated to within ±5 to 20%. Dysprosium dissolution is predicted to within ±10%. Dysprosium oxide is a poor surrogate for refractory PuO2.
