Abstract
Design of Cryostat Main Chamber and Vacuum Vessel Pressure Suppression System (VVPS) of International Thermonuclear Experimental Reactor (ITER) has been conducted. The cryostat is a cylindrical vessel that includes in-vessel component such as vacuum vessel, superconducting toroidal coils and poloidal coils. This cryostat provides the adiabatic vacuum about 10{sup -4} Pa for the superconducting coils operating at 4 K and forms the second confinement barrier to tritium. The adiabatic vacuum is to reduce thermal loads applied to the superconducting coils and their supports so as to keep their temperature 4 K. The VVPS consists of a suppression tank located under the lower bio-shield and 4 relief pipes to connect the vacuum vessel and the suppression tank. The VVPS is to keep the maximum pressure rise of the vacuum vessel below the design value of 0.5 MPa in case of the in-vessel LOCA (water spillage from in-vessel component). The spilled water and steam are lead to the suppression tank through the relief pipes when the internal pressure of vacuum vessel is over 0.2 MPa, and then the internal pressure is kept below 0.5 MPa. This report summarizes the structural design of the cryostat main chamber and pressure suppression system, together with
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Ito, Akira;
Nakahira, Masataka;
Takahashi, Hiroyuki;
Tada, Eisuke;
[1]
Nakashima, Yoshitane;
Ueno, Osamu
- Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Citation Formats
Ito, Akira, Nakahira, Masataka, Takahashi, Hiroyuki, Tada, Eisuke, Nakashima, Yoshitane, and Ueno, Osamu.
ITER cryostat main chamber and vacuum vessel pressure suppression system design.
Japan: N. p.,
1999.
Web.
Ito, Akira, Nakahira, Masataka, Takahashi, Hiroyuki, Tada, Eisuke, Nakashima, Yoshitane, & Ueno, Osamu.
ITER cryostat main chamber and vacuum vessel pressure suppression system design.
Japan.
Ito, Akira, Nakahira, Masataka, Takahashi, Hiroyuki, Tada, Eisuke, Nakashima, Yoshitane, and Ueno, Osamu.
1999.
"ITER cryostat main chamber and vacuum vessel pressure suppression system design."
Japan.
@misc{etde_364260,
title = {ITER cryostat main chamber and vacuum vessel pressure suppression system design}
author = {Ito, Akira, Nakahira, Masataka, Takahashi, Hiroyuki, Tada, Eisuke, Nakashima, Yoshitane, and Ueno, Osamu}
abstractNote = {Design of Cryostat Main Chamber and Vacuum Vessel Pressure Suppression System (VVPS) of International Thermonuclear Experimental Reactor (ITER) has been conducted. The cryostat is a cylindrical vessel that includes in-vessel component such as vacuum vessel, superconducting toroidal coils and poloidal coils. This cryostat provides the adiabatic vacuum about 10{sup -4} Pa for the superconducting coils operating at 4 K and forms the second confinement barrier to tritium. The adiabatic vacuum is to reduce thermal loads applied to the superconducting coils and their supports so as to keep their temperature 4 K. The VVPS consists of a suppression tank located under the lower bio-shield and 4 relief pipes to connect the vacuum vessel and the suppression tank. The VVPS is to keep the maximum pressure rise of the vacuum vessel below the design value of 0.5 MPa in case of the in-vessel LOCA (water spillage from in-vessel component). The spilled water and steam are lead to the suppression tank through the relief pipes when the internal pressure of vacuum vessel is over 0.2 MPa, and then the internal pressure is kept below 0.5 MPa. This report summarizes the structural design of the cryostat main chamber and pressure suppression system, together with their fabrication and installation. (author)}
place = {Japan}
year = {1999}
month = {Mar}
}
title = {ITER cryostat main chamber and vacuum vessel pressure suppression system design}
author = {Ito, Akira, Nakahira, Masataka, Takahashi, Hiroyuki, Tada, Eisuke, Nakashima, Yoshitane, and Ueno, Osamu}
abstractNote = {Design of Cryostat Main Chamber and Vacuum Vessel Pressure Suppression System (VVPS) of International Thermonuclear Experimental Reactor (ITER) has been conducted. The cryostat is a cylindrical vessel that includes in-vessel component such as vacuum vessel, superconducting toroidal coils and poloidal coils. This cryostat provides the adiabatic vacuum about 10{sup -4} Pa for the superconducting coils operating at 4 K and forms the second confinement barrier to tritium. The adiabatic vacuum is to reduce thermal loads applied to the superconducting coils and their supports so as to keep their temperature 4 K. The VVPS consists of a suppression tank located under the lower bio-shield and 4 relief pipes to connect the vacuum vessel and the suppression tank. The VVPS is to keep the maximum pressure rise of the vacuum vessel below the design value of 0.5 MPa in case of the in-vessel LOCA (water spillage from in-vessel component). The spilled water and steam are lead to the suppression tank through the relief pipes when the internal pressure of vacuum vessel is over 0.2 MPa, and then the internal pressure is kept below 0.5 MPa. This report summarizes the structural design of the cryostat main chamber and pressure suppression system, together with their fabrication and installation. (author)}
place = {Japan}
year = {1999}
month = {Mar}
}