JOPSS - Search Results

Search Results: Records 1-7 displayed on this page of 7

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Journal Articles

Fast spectrum control rod materials

Nagata, Takako; Maeda, Koji

Comprehensive Nuclear Materials, Vol.3, p.509 - 534, 2012/00

https://doi.org/10.1016/B978-0-08-056033-5.00078-1

This article is a review of fast reactor control rod materials and is part of the Elsevier Comprehensive Nuclear Materials Series. Control rods have three primary functions; reactivity compensation during the operating cycle, start-and-stop control for normal operation, and rapid shutdown during abnormal conditions. As an absorber material, boron carbide (B $_{4}$ C) is mainly used in fast reactor systems, such as the Japanese experimental reactor JOYO. The current core configuration of JOYO is Mark-3 (MK-3). The control rods are inserted automatically when abnormal conditions occur. In both the MK-2 and MK-3 cores, all control rods have the same structure and functions. Every control rod assembly has seven control rod elements, and B $_{4}$ C pellets are used as absorbers. The boron in B $_{4}$ C includes $^{10}$ B and $^{11}$ B. Control rods function as safety (shutdown) rods, regulating rods, rapid shutdown rods, additional shutdown rods, absorber pins, worth of controlled rods, vertical travel of control rods, rod-drop time, and features of the drive mechanism.

Journal Articles

Doppler effect measurement on resonance materials for rock-like oxide fuels in an intermediate neutron spectrum

Ando, Masaki; Nakano, Yoshihiro; Okajima, Shigeaki; Kawasaki, Kenji

Journal of Nuclear Materials, 319, p.126 - 130, 2003/06

https://doi.org/10.1016/S0022-3115(03)00144-2

Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)

Doppler effect experiments on resonance materials for ROX fuels were carried out to examine the calculation accuracy in the intermediate neutron spectrum using Fast Critical Assembly (FCA) at Japan Atomic Energy Research Institute. This study is the second phase of a series of the Doppler effect experiments on the resonance materials, which is following the measurements in the fast neutron spectrum. The Doppler effect was measured as the sample reactivity change between the heated and unheated samples. The cylindrical samples of the resonance materials such as erbium (Er), tungsten (W) and thorium (ThO $_{2}$ ) were used. The sample was heated up to 800 $^{circ}$ C at the center of the FCA core. The Doppler effect measurements were analyzed using the SRAC 95 code system with the use of JENDL 3.2. The calculated values agreed with the experiment within the experimental error for the W and ThO $_{2}$ samples, while the calculation overestimated the experiment for the Er sample about 10 %.