Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Shu, Wataru; Matsuyama, Masao*; Suzuki, Takumi; Nishi, Masataka
Fusion Engineering and Design, 81(1-7), p.803 - 808, 2006/02
Times Cited Count：12 Percentile：63(Nuclear Science & Technology)In this work, the counting rate of bremsstrahlung X-rays was measured against the tritium partial pressure in two mixed gases diluted with helium or hydrogen. Subsequently, the counting rate was also measured against total pressure for T
-He mixture at a constant tritium partial pressure of 93 Pa or 1.3 kPa. For both mixtures, the counting rate of bremsstrahlung X-rays decreased linearly with the decreasing tritium partial pressure when the total pressure is smaller than about 10 kPa. At higher pressures, the deviation from the linear relationship appeared due to absorption of beta-particles in the gas phase, and this can be decreased by some commercially available arrangements. On the other hand, the counting rate of bremsstrahlung X-rays depended only upon the tritium partial pressure when absorption of beta-particles in the gas phase is negligibly small. The results obtained show that this method of tritium monitoring is very promising for the fuel processing system of fusion reactors, especially for tritium recovery system of breeding blankets.
Shu, Wataru; Matsuyama, Masao*; Suzuki, Takumi; Nishi, Masataka
Nuclear Instruments and Methods in Physics Research A, 521(2-3), p.423 - 429, 2004/04
Times Cited Count：19 Percentile：75.17(Instruments & Instrumentation)The characteristics of a promising tritium process monitor using a NaI(Tl) scintillation detector for X-rays was examined with pure tritium in a concentration range of 10
-10
GBq/m
. The measurement of tritium concentration was achieved by observing the bremsstrahlung X-rays generated by the interaction between the tritium beta particles and a gold film coated on the inside of beryllium window. A linear relationship between the counting rate of bremsstrahlung X-rays and the tritium concentration was observed for tritium concentration range of 10-10
GBq/m, and the sensitivity of the monitor was determined to be about 0.5GBq/m per cpm in this concentration range. The characteristics were also investigated with a tritium mixture diluted with deuterium (atomic ration of tritium: 0.83%), and He release from a uranium bed during heating was traced with this monitor.
Sawamura, Sadashi*
PNC TJ1600 97-001, 77 Pages, 1997/03
no abstracts in English
Sakamoto, Yukio; Nakane, Yoshihiro; Tanaka, Shunichi
KEK-Proceedings-95-9, 0, p.119 - 127, 1995/11
no abstracts in English
; ; ;
JAERI-M 82-148, 21 Pages, 1982/11
no abstracts in English
Matsumura, Taichi; Fujita, Manabu*; Terashima, Kenichi; Sakamoto, Masahiro; Okumura, Keisuke
no journal, ,
no abstracts in English
