Type of Document Dissertation Author DePorter, Elden Leo URN etd-06092012-141041 Title Optimization of material flow in the nuclear fuel cycle using a cyclic multi-stage production-to-inventory model. Degree PhD Department Industrial Engineering and Operations Research Advisory Committee
Advisor Name Title Kurstedt, Harold A. Jr. Committee Co-Chair Nachlas, Joel A. Committee Co-Chair Davis, Robert P. Committee Member Schmidt, J. William Committee Member Keywords
- Nuclear fuels
Date of Defense 1977-08-15 Availability restricted AbstractThe nuclear fuel cycle is modelled as a cyclic, multi-stage production-to-inventory system. The objective is to meet a known deterministic demand for energy while minimizing acquisition,
production, and inventory holding costs for all stages of the fuel cycle. The model allows for cyclic flow (feedback) of materials, material flow conversion factors at each stage, production lag times at each stage, and for escalating costs of uranium ore. It does not allow shortages to occur in inventories. The model is optimized by
the application of the calculus of variations and specifically through recently developed theorems on the solution of functionals constrained by inequalities. The solution is a set of optimal
cumulative production trajectories which define the stagewise production rates. Analysis of these production rates reveals the optimal nuclear fuel cycle costs and that inventories (stockpiles)
occur in uranium fields, enriched uranium hexafluoride, and fabricated fuel assemblies. An analysis of the sensitivity of the model to variation in three important parameters is performed.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access LD5655.V856_1977.D46.pdf 6.31 Mb 00:29:13 00:15:01 00:13:08 00:06:34 00:00:33next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.
If you have questions or technical problems, please Contact DLA.