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Report No.
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Structural design on mercury target vessel

Wakui, Takashi ; Kogawa, Hiroyuki ; Haga, Katsuhiro ; Futakawa, Masatoshi ; Uchiyama, Naoyoshi*; Nakamura, Koji*

The mercury target vessel installed in J-PARC consists of the mercury vessel and the safety hull, which corves the mercury vessel, to prevent the leak of mercury to outside at the failure of the mercury vessel. The safety hull is a double-walled structure to make the cooling channel of heavy water. The helium gas in a space between the mercury vessel and the safety hull can prevent the inflow of mercury into heavy water at the failure of the mercury vessel. The design pressure of each medium is 0.5 MPaG. The temperature of the mercury target vessel and mercury rises at a moment of the proton beam injection and then the thermal shock and the deformation of the mercury vessel occur. The mercury target vessel is imposed by not only static load due to the inner pressure and dead weight but also repeated dynamic load. Based on loading conditions, the structural integrity of the mercury target vessel was evaluated using numerical analyses. The results were described as following.

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