Fuel consolidation demonstration: Consolidation concept development [report]

1990 unpublished
Utilities can substantially increase the capacity of spent-fuel storage pools by using fuel consolidation systems. Recently, engineers obtained valuable information from a demonstration at the Northeast Utilities Service Company Millstone unit 2 nuclear power station in Connecticut. Operating experience based on this demonstration provided crucial data for evaluating fuel consolidation systems designed for widespread use. BACKGROUND Utilities must find a way to store spent nuclear fuels until
more » ... clear fuels until DOE can provide a permanent repository, which is unlikely before the turn of the century. Advanced storage alternatives under consideration include on-site dry storage and spent-fuel consolidation. The latter approach affords economic advantages by effectively increasing the capacity of existing reactor storage pools. EPRI, Northwest Utilities Service Company (NUSCO), DOE, Baltimore Gas & Electric Company, and Combustion Engineering, Inc., cosponsored a program to develop analytic methods and to demonstrate a full-scale fuel consolidation storage system. OBJECTIVE To describe the design, structure, and operation of the Millstone unit 2 fuel consolidation and storage system, including disposal of the fuel-assembly scrap that remains after consolidation. APPROACH The development of equipment and techniques to consolidate spent fuel was an evolutionary process that finally resulted in the consolidation system used in the Millstone-2 demonstration. Beginning with a reference design, investigators fabricated equipment components, cold-tested the components for operability, and, as necessary, redesigned equipment to meet functional requirements. The report was then structured and written so that the function of various components could be easily understood. RESULTS The report physically and functionally describes the consolidation system components and the procedures used to operate the system. Special attention is given to the problems of treating and disposing of assembly scrap hardware, including a discussion of the safety considerations of handling Zircaloy. In addition, the report provides an evaluation of considerations
doi:10.2172/6978063 fatcat:u4ecfxlgwvc2tb7z7rghzlc25i