This report describes progress made at the Idaho National Engineering • Laboratoryduring the first three quarters of Fiscal Year (FY) 1992 on the Laboratory-Directed Research and Development (LDRD) project to perform " preliminarydesign studies on the Broad ApplicationTest Reactor (BATR). This work builds on the FY-92 BATR studies,"which identifiedanticipatedmission and safety requirementsfor BATR and assessed a variety of reactor concepts for their potential capabilityto meet those requirements. The main accomplishmentof the FY-92 BATR program is the development of baseline reactor configurationsfor the two conventionalconceptualtest reactors recommended in the FY-91 report. Much of the present report consists of descriptionsand neutronicsand thermohydraulicsanalyses of these baseline configurations. In addition,we consideredreactor safety issues, compared the consequencesof steam explosionsfor alternativeconventionalfuel types, explored a Molten Chloride Fast Reactor concept as an alternate BATR design, and examined strategies for the reduction of operating costs. Work planned for the last quarter of FY-92 is discussed, and recommendationsfor future work are also presented.
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