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- W317024907 abstract "Some special purpose heavy-water reactors (EM) are made of assemblies consisting of a number of coaxial aluminum-clad U-Al alloy fuel tubes and an outer Al sleeve surrounding the fuel tubes. The heavy water coolant flows in the annular gaps between the circular tubes. Analysis of severe accidents in such reactors requires a model for predicting the behavior of the fuel tubes as they melt and disrupt. This paper describes a detailed, mechanistic model for fuel tube heatup, melting, freezing, and molten material relocation, called MARTINS (Melting and Relocation of Tubes in Nuclear subassembly). The paper presents the modeling of the phenomena in MARTINS, and an application of the model to analysis of a reactivity insertion accident. Some models are being developed to compute gradual downward relocation of molten material at decay-heat power levels via candling along intact tubes, neglecting coolant vapor hydrodynamic forces on molten material. These models are inadequate for high power accident sequences involving significant hydrodynamic forces. These forces are included in MARTINS." @default.
- W317024907 created "2016-06-24" @default.
- W317024907 creator A5036196457 @default.
- W317024907 date "1994-03-01" @default.
- W317024907 modified "2023-09-23" @default.
- W317024907 title "MARTINS: A foam/film flow model for molten material relocation in HWRs with U-Al-fueled multi-tube assemblies" @default.
- W317024907 hasPublicationYear "1994" @default.
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