Russian ice-breakers and other polar ships with nuclear propulsion will be totally modernized now because of nuclear fuel exhaustion during their operation and a necessity for exchanging the spent nuclear fuel. In this connection, a plant consisting of 2 salt melt-cooled nuclear reactors (MARS-S type, each 150 MW in power) was developed and constructed. The fuel microelement assembly of each reactor has 60 channels for the fuel microelements (17 mm in diameter) and 31 channels for the cooling salt (40 mm in diameter) hexagonally spaced in a graphite matrix block (360 mm in size). A molten mixture of lithium and berylium fluorides was used as the heat-transfer fluid. The fuel microelement cores were covered with carbide layers before they were assembled. Two secondary heat exchangers were fed with the salt melt (750 deg C) and preheated air as the cooling medium. The hot air was then used in 2 gas turbine plants (72 or 108 MW in power at environment temperatures 50 deg C or -50 deg C, energy efficiency 24% or 36%, respectively) for driving 2 current generators (45 MW in power). The 10.5-kV current generated was finally used for driving the 3 screw propeller electromotors. The enthalpy of the secondary air was used for waste-heat boilers (superheated steam capacity 75 t/h), optionally after addition of steam before the gas turbine. The new nuclear power plants were design for replacing the old ones on the Russian ice-breaker Tajmyr and barge carrier Sevmorput as well as for equipping a new floating power plant. The expected operation life of the new nuclear power plants is 25 years.


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    Title :

    Perspective nuclear fuel-microelement power plants on nuclear ships


    Additional title:

    Titel russisch


    Contributors:

    Published in:

    Publication date :

    2006


    Size :

    3 Seiten, 3 Bilder, 1 Quelle



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    Russian






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