Appendix 9 Opportunities for further analyses or research & development

  • There is need for better characterization of oxide fuels operating in a load following mode than currently exists (Appendix 2)
  • By analysis, examine core design approaches that best reduce reactivity swing with burnup and enable very long lived core designs (Appendix 2C)
  • Determine the optimum split in thickness between upper and lower axial blankets that accounts for control rod shadowing.¬† Account for heterogeneous core in analyses (Appendix 2C)
  • Development of a remote controlled variable flow control device for inner blanket assemblies that is self actuated (Appendix 2D)
  • As an alternative to the above, develop a device that is self actuated that regulates the temperatures of both fuel and blanket assemblies (Appendix 2D)
  • Control and operation of a naturally circulating LMFBR (Appendix 2E)
  • Core restraint for a core loaded with ductless fuel (Appendix 2C)
  • Sort out the details of adopting the SRE refueling approach to a large LMFBR (Section 6)
  • Design of a reliable lower closure valve for a refueling shroud (Section 6)
  • Detailed literature survey of the SEFOR refueling system approach (Section 6)
  • Evaluate heat loads and sodium deposition rates within the refueling cell during refueling (Section 6)
  • Review of the SRE and Hallam reactor bottom support to determine how obvious design questions concerning this approach were resolved on those plants (Section 6)
  • Determine the scalability of the SRE/Hallam reactor vessel support design approaches to large sized plants (Section 6)
  • Quantify the economic incentive for adoption of the bottom mounted reactor vessel concept (Section 6)
  • Determine by analyses if it is feasible to eliminate the reactor vessel thermal liner in the bottom mounted configuration (Section 6)
  • Examine the potential for combining the functions of the reactor vessel and the core barrel thus eliminating the core barrel (Section 6)
  • Update earlier tradeoff studies comparing argon and helium cover gases given that the only primary system component requiring cover gas is the RV (Section 6)
  • Experimental activity to explore the effects of thermal striping on prospective UIS materials (Section 6)
  • Identify materials most suitable for use in a compact PHTS (Section 7)
  • Explore the options for core tailoring using minor actinide fuels (Appendix 3)
  • Perform literature survey on self-actuated shutdown systems, perform tradeoff and evaluation of alternatives, identify weaknesses and develop indicated improvements (Section 10)
  • Determine the practicality of fractional distillation as a means of removal of Cs137 from the Na coolant (Section 12)
  • Evaluate the rate of migration of fission gasses in vented fuel from the location of formation to the space above the upper axial blanket (Section 12)
  • Evaluate opportunities for improvements to the SWRPS that would reduce its cost (Section 12)