Feasibility study of a high-speed X-ray visualization method for multiphase interactions

Usami, Tsutomu; Moriyama, Kiyofumi; Nishikizawa, Tomotoshi; Nakamura, Hideo

JAERI-Tech 2005-028, 37 Pages, 2005/05

JAERI-Tech-2005-028.pdf:16.32MB

The steam explosion during a severe accident in a light water reactor, which may occur by the contact of molten core and coolant, has been known as a potential threat on the integrity of the containment vessel, and has been studied in the nuclear safety research field. Prediction of the intensity of steam explosions needs an understanding of the initial premixture. However, visual observation of the premixture in experiments is usually difficult due to the vapor generation. Thus, we investigated the possibility of a high-speed X-ray visualization with a 4500 f/s high speed video camera with an image-intensifier and three kinds of scintillator materials: CdWO, ZnS(Ag) and CsI(Tl). A modeled premixture consisted of metal objects and bubbles in a water vessel was used. The test result showed that the CsI(Tl) scintillator gave the best image quality among the three and the high-speed visualization at 4500 f/s was possible, though in the still picture which carried out one of the recorded picture, the picture became indistinct.

Application of high-frame-rate neutron radiography to steam explosion research

Saito, Y.*; Mishima, Kaichiro*; Hibiki, Takashi*; *; Sugimoto, Jun; Moriyama, Kiyofumi

Nuclear Instruments and Methods in Physics Research A, 424(1), p.142 - 147, 1999/00

https://doi.org/10.1016/S0168-9002(98)01298-4

no abstracts in English

The Effect of system constraint on coolant injection mode of energetic fuel-coolant interactions

Park, H.; Yamano, Norihiro; Maruyama, Yu; Moriyama, Kiyofumi; Yang, Y.; Sugimoto, Jun

Dai-35-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 3, p.803 - 804, 1998/00

no abstracts in English

Effect of water jet dynamics in the coolant injection mode of fuel-coolant interactions

H.S.Park*; ; Maruyama, Yu; Moriyama, Kiyofumi; Y.Yang*; Sugimoto, Jun

Proc. of 1998 ASME/JSME Joint Pressure Vessels and Piping Conf., 362, p.49 - 56, 1998/00

no abstracts in English

Technical note on ex-vessel core melt debris coolability and steam explosions

Yamano, N.; Maruyama, Yu; Moriyama, Kiyofumi; Sugimoto, Jun

NEA/CSNI/R(96)24, 0, p.1 - 49, 1996/00

no abstracts in English

Development of steam explosion simulation code JASMINE

Moriyama, Kiyofumi; Yamano, N.; Maruyama, Yu; Kudo, Tamotsu; *; *; Sugimoto, Jun

JAERI-Data/Code 95-016, 50 Pages, 1995/11

JAERI-Data-Code-95-016.pdf:1.61MB

no abstracts in English

Current status of large-scale steam explosion experiments

Yamano, N.; Moriyama, Kiyofumi; Maruyama, Yu; Kudo, Tamotsu; Sugimoto, Jun

Proc., Seminar on the Vapor Explosions in Nuclear Power Safety,Kanzanji 1995, 0, p.121 - 139, 1995/00

no abstracts in English

OCCD/NEA Specialist Mtg. on Fuel-Coolant Interactions

Akiyama, Mamoru*; Yamano, Norihiro

Nihon Genshiryoku Gakkai-Shi, 35(7), p.630 - 631, 1993/07

no abstracts in English

Steam explosions of single drops of molten aluminum and 6061 alloy

L.S.Nelson*; Fuketa, Toyoshi; Eatough, M. J.*; F.J.Vigil*

Dai-27-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, p.319 - 321, 1990/05

no abstracts in English