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- W123400170 abstract "The steam generator for the current Modular High Temperature Gas-Cooled Reactor (MHTGR) has evolved from a technology basis developed in U.S. and European gas-cooled reactor programs. The MHTGR steam generator is a vertically-oriented, counterflow, shell-and-tube, once-through, non-reheat, helical heat exchanger with helium on the shell side and water/steam in the tubes. In the MHTGR applications, the normal operating temperatures of the steam generator tubes can be as high as 638/sup 0/C (1180/sup 0/F). Concerns such as cost, creep strength, steam side scaling and stress corrosion cracking often lead to a design decision to use two different tube materials, one for the evaporating portion and another for the superheating portion of the steam generator. The current MHTGR steam generator design utilizes 2 1/4 CR - 1 Mo material for the economizer/evaporator/initial superheater tube section and Alloy 800H material for the finishing superheat tube section. Therefore, a dissimilar metal weld (DMW) is incorporated in each tube circuit. This feature of the design imposes certain important constraints on the steam generator designer. This paper presents an overview of the MHTGR steam generator conceptual design, and then focuses on the DMW considerations and how these have influenced the design configuration." @default.
- W123400170 created "2016-06-24" @default.
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- W123400170 date "1987-01-01" @default.
- W123400170 modified "2023-09-27" @default.
- W123400170 title "Steam generator conceptual design for the modular HTGR - Dissimilar metal weld considerations" @default.
- W123400170 hasPublicationYear "1987" @default.
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