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    Investigation of Countermeasure Against Local Temperature Rise in Vessel Cooling System in Loss of Core Cooling Test Without Nuclear Heating

    Source: Journal of Nuclear Engineering and Radiation Science:;2016:;volume( 002 ):;issue: 004::page 44502
    Author:
    Ono, Masato
    ,
    Shimizu, Atsushi
    ,
    Kondo, Makoto
    ,
    Shimazaki, Yosuke
    ,
    Shinohara, Masanori
    ,
    Tochio, Daisuke
    ,
    Iigaki, Kazuhiko
    ,
    Nakagawa, Shigeaki
    ,
    Takada, Shoji
    ,
    Sawa, Kazuhiro
    DOI: 10.1115/1.4032478
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: In the loss of core cooling test using High Temperature engineering Test Reactor (HTTR), the forced cooling of the reactor core is stopped without inserting control rods into the core and, furthermore, without cooling by the vessel cooling system (VCS) to verify safety evaluation codes to investigate the inherent safety of high-temperature gas-cooled reactor (HTGR) be secured by natural phenomena to make it possible to design a severe accident-free reactor. The VCS passively removes the retained residual heat and the decay heat from the core via the reactor pressure vessel (RPV) by natural convection and thermal radiation. In the test, the local temperature was supposed to exceed the limit from the viewpoint of long-term use at the uncovered water-cooling tube without thermal reflectors in the VCS, although the safety of reactor is kept. Through a cold test, which was carried out by non-nuclear heat input from helium gas circulators (HGCs) by stopping water flow in the VCS, the local higher temperature position was specified in the uncovered water-cooling tube of the VCS, although the temperature was sufficiently lower than the maximum allowable working temperature, and the natural circulation of water had an insufficient cooling effect on the temperature of the water-cooling tube below 1°C. Then, a new safe and secured procedure for the loss of core cooling test was established, which will be carried out soon after the restart of HTTR.
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      Investigation of Countermeasure Against Local Temperature Rise in Vessel Cooling System in Loss of Core Cooling Test Without Nuclear Heating

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4235387
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    • Journal of Nuclear Engineering and Radiation Science

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    contributor authorOno, Masato
    contributor authorShimizu, Atsushi
    contributor authorKondo, Makoto
    contributor authorShimazaki, Yosuke
    contributor authorShinohara, Masanori
    contributor authorTochio, Daisuke
    contributor authorIigaki, Kazuhiko
    contributor authorNakagawa, Shigeaki
    contributor authorTakada, Shoji
    contributor authorSawa, Kazuhiro
    date accessioned2017-11-25T07:18:45Z
    date available2017-11-25T07:18:45Z
    date copyright2016/10/12
    date issued2016
    identifier issn2332-8983
    identifier otherners_2_4_044502.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4235387
    description abstractIn the loss of core cooling test using High Temperature engineering Test Reactor (HTTR), the forced cooling of the reactor core is stopped without inserting control rods into the core and, furthermore, without cooling by the vessel cooling system (VCS) to verify safety evaluation codes to investigate the inherent safety of high-temperature gas-cooled reactor (HTGR) be secured by natural phenomena to make it possible to design a severe accident-free reactor. The VCS passively removes the retained residual heat and the decay heat from the core via the reactor pressure vessel (RPV) by natural convection and thermal radiation. In the test, the local temperature was supposed to exceed the limit from the viewpoint of long-term use at the uncovered water-cooling tube without thermal reflectors in the VCS, although the safety of reactor is kept. Through a cold test, which was carried out by non-nuclear heat input from helium gas circulators (HGCs) by stopping water flow in the VCS, the local higher temperature position was specified in the uncovered water-cooling tube of the VCS, although the temperature was sufficiently lower than the maximum allowable working temperature, and the natural circulation of water had an insufficient cooling effect on the temperature of the water-cooling tube below 1°C. Then, a new safe and secured procedure for the loss of core cooling test was established, which will be carried out soon after the restart of HTTR.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleInvestigation of Countermeasure Against Local Temperature Rise in Vessel Cooling System in Loss of Core Cooling Test Without Nuclear Heating
    typeJournal Paper
    journal volume2
    journal issue4
    journal titleJournal of Nuclear Engineering and Radiation Science
    identifier doi10.1115/1.4032478
    journal fristpage44502
    journal lastpage044502-4
    treeJournal of Nuclear Engineering and Radiation Science:;2016:;volume( 002 ):;issue: 004
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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