This report describes the EG&G LaboratoryDirected Research and Development Program (LDRD) Broad Application Test Reactor (BATR) Project that was conducted in fisca_ year 1991. The scope of this project was divided into three phases" a project process definitionphase, a requirementsdevelopmentphase, and a preconceptualreactor design and evaluation phase. Multidisciplinaryteams of experts conducted each phase. This report presents the need for a new test reactor, the project process definition, a set of current and projected regulatorycompliance and safety requirements,a set of facility user needs for a broad range of projected testing missions, and descriptionsof reactor concepts capable of meeting these requirements. This informationcan be applied to strategic planning to provide the Departmentof Energy with management options. q, w. 8 iii D-4 Rectangular Layout of 4 X 4 Modules. The Intermodule Separation is 2D, Twice the Outer Fuel Side Plate Diameter of a Module.

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