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Iguchi, Tadashi; Shibamoto, Yasuteru; Asaka, Hideaki; Nakamura, Hideo
Proceedings of 10th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-10), 16 Pages, 2003/10
Thermal-hydraulic and neutronic dynamics are always interrelated in BWR core. This is called thermal-hydraulic and neutronic (T/N) coupling. Channel stability experiments with T/N coupling under non-nuclear condition are very limited. This is mainly due to the difficulties in the real-time simulation of neutron dynamics and in the fast-response void fraction measurement under high-pressure and temperature conditions. Authors have developed techniques to solve the above difficulties, and have succeeded in experimentally simulating T/N coupling under non-nuclear conditions with the THYNC facility. Using THYNC facility, T/N coupling effect on channel stability was investigated. Experiments were performed under Pressure=2-7MPa, Subcooling=10-40K, and Mass flux=270-660kg/m
s. THYNC results indicated T/N coupling lowered the channel stability threshold. The reduction of channel stability threshold due to T/N coupling was small within 10% at 7MPa in the present THYNC experiment, although the experimental condition was set to be more severe than that supposed in a reactor.
ions with H atoms*; Shirai, Toshizo; Shimakura, N.*
Phys. Scr., T73, p.110 - 111, 1997/00
Times Cited Count：1 Percentile：19.26(Physics, Multidisciplinary)no abstracts in English
Iyoku, Tatsuo; Futakawa, Masatoshi; Shirai, Hiroshi*; Shiozawa, Shusaku; Ishihara, Masahiro; Takikawa, Noboru*
Proc. of the 12th Int. Conf. on Structural Mechanics in Reactor Technology,Vol. K; SMiRT 12, p.97 - 102, 1993/00
no abstracts in English
; Shinohara, Yoshikuni; Usui, Hozumi
JAERI-M 89-219, 35 Pages, 1989/12
no abstracts in English
; ; ; ; Tsunematsu, Toshihide; ; ; Takeda, Tatsuoki
JAERI-M 9788, 17 Pages, 1981/11
no abstracts in English
-electron states in NpPd
Al
and the origin of the heavy fermion stateMetoki, Naoto; Aoki, Dai*; Griveau, J.-C.*; Otsuki, Junya*
no journal, ,
Non-Krammers trivalent Np
(5
) ion in the heavy fermion superconductor NpPdAl shows 
=4, similar to Pr. We determined the singlet ground state of 
and the first excited doublet of 
above 49 K from the quantitative analysis of the magnetic susceptibility and the magnetization curve. The must contribute to the heavy fermion, since the singlet ground state alone cannot, where 2-channel Kondo effect appears based on . The low-temperature specific heat of NpPdAl can be explained with the superposition of the heavy fermion state and localized Schottky anomaly, where the total entropy was maintained 
ln3 for pseudo-triplet state. The 
-coupling scheme of AnPdAl can be described by the corresponding 
- coupling scheme, where Pu and Np are the hole version of Ce and Pr. The in NpPdAl is stabilized with the same mechanism as in PrTX
, both exhibit the unconventional superconductivity.
