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JAEA Reports

Structural integrity of heavy liquid-metal target installed in spallation neutron facility, 4; Consideration by fracture mechanics of target container window

Ishikura, Shuichi*; Kogawa, Hiroyuki; Futakawa, Masatoshi; Kikuchi, Kenji; Haga, Katsuhiro; Kaminaga, Masanori; Hino, Ryutaro

JAERI-Tech 2003-093, 55 Pages, 2004/01

JAERI-Tech-2003-093.pdf:5.41MB

To estimate the structural integrity of the heavy liquid-metal (Hg) target used in a MW-class neutron scattering facility, static and dynamic stress behaviors due to the incident of a 1MW-pulsed proton beam were analyzed. In the analyses, two-type target containers with semi-cylindrical type and flat type window were used as analytical models of the structural analysis codes LS-DYNA. As a result, it is confirmed that the stress generated by dynamic thermal shock becomes the largest at the center of window, and the flat type window is more advantageous from the structural viewpoint than the semi-cylindrical type window. It was confirmed to erosion damage the target container by mercury's becoming negative pressure in the window and generating the cavitation by the experiment. Therefore, it has been understood that the point top of the window was in the compression stress field by the steady state thermal stress because of the evaluation from destroying the dynamic viewpoint for the crack in the generated pit and the pit point, and the crack did not progress.

Journal Articles

Thermal shock analysis of liquid-mercury spallation target

Ishikura, Shuichi*; Kogawa, Hiroyuki; Futakawa, Masatoshi; Hino, Ryutaro; Date, Hidefumi*

Koon Gakkai-Shi, 28(6), p.329 - 335, 2002/11

The developments of the neutron scattering facilities are carried out under the high-intensity proton accelerator project promoted by JAERI and KEK. To estimate the structural integrity of the heavy liquid-metal (Hg) target used as a spallation neutron source in a MW-class neutron scattering facility, dynamic stress behavior due to the incident of a 1MW-pulsed proton beam were analyzed by using FEM code. Two-type target containers with semi-cylindrical type and flat-plate type window were used as models for analyses. As a result, it is confirmed that the stress (pressure wave) generated by dynamic thermal shock becomes the largest at the center of window, and the flat-plate type window is more advantageous from the structural viewpoint than the semi-cylindrical type window. It has been understood that the stress generated in the window by the pressure wave can be treated as the secondary stress.

Journal Articles

Initial free surface instabilities on a high speed water jet simulating a liquid-metal target

Ito, Kazuhiro*; Tsuji, Yoshiyuki*; Nakamura, Hideo; Kukita, Yutaka*

Fusion Technology, 36(1), p.69 - 84, 1999/07

no abstracts in English

Journal Articles

Optical measuremet of waves on high speed water jet

Ito, Kazuhiro*; Tsuji, Yoshiyuki*; Nakamura, Hideo; Kukita, Yutaka*

9th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-9)(CD-ROM), 16 Pages, 1999/00

no abstracts in English

Journal Articles

Rubidium from a liquid metal to a plasma

*; G.Kahl*

Strongly Coupled Coulomb Systems, p.129 - 134, 1998/00

no abstracts in English

Journal Articles

First-principles molecular dynamics of liquid alkali metals based on the quantal hypernetted chain theory

; Chihara, Junzo

Physical Review E, 53(6), p.6253 - 6263, 1996/06

 Times Cited Count:16 Percentile:39.78(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Liquid-metal heat transfer for the first wall and limiter/divertor plates of fusion reactors

M.Z.Hasan*; Kunugi, Tomoaki

Heat Transfer-Minneapolis,1991 (AIChE Symp. Ser. No. 283), p.67 - 73, 1991/00

no abstracts in English

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