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( T. Furuhata ),( T. Oshima ),( S. Tozuka ),( M. Arai ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-
We have paid attention to the ignition behavior of two diesel sprays which were simultaneously injected and interacted with each other after wall impingement. In this study, the effect of fuel injection mass on the ignition behavior of two diesel sprays impinged on a wall and then interacted with each other was investigated experimentally. The combustion equipment consisted of a pressure chamber and electric heaters. High-pressure hot air (3MPa) was charged to the chamber through the electric heaters. The pressure chamber was equipped with two injectors so that two parallel sprays impinged perpendicularly on the impingement wall. The injection pressure was 90MPa. JIS No.2 diesel fuel was used as a test fuel. From the observation of ignition, it was found that the lowest ignition temperature of interacting two sprays decreased with increasing fuel injection mass in the range between 12mg (6mg×2) and 42mg (21mg×2). Appearance positions of luminous flame, OH and C2 radical luminosities appeared in the area where two sprays collided and interacted with each other, and therefore the interaction affected the ignition of the two sprays impinging on the wall. The ignition of two sprays with interaction was sometimes hard to occur compared to the one of impinging single spray owing to the effect of interaction between two sprays when the ignition was occur after fuel injection end.
REVIEW AND FUTURE ISSUES ON SPENT NUCLEAR FUEL STORAGE
T. SAEGUSA,K. SHIRAI,T. ARAI,J. TANI,H. TAKEDA,M. WATARU,A. SASAHARA,P. L. WINSTON 한국원자력학회 2010 Nuclear Engineering and Technology Vol.42 No.3
The safety of metal cask and concrete cask storage technology has been verified by CRIEPI through several research programs on demonstrative testing for the interim storage of spent fuel. The results have been reflected in the safety requirements for dry casks issued by NISA/METI (Nuclear and Industrial Safety Agency, Ministry of Economy, Trade and Industry) of the Japanese government. On top of that, spent fuel integrity has been studied by the Japan Nuclear Energy Safety Organization (JNES). This paper reviews these research programs. Future issues include the long-term integrity of cask components and high burn-up spent fuel.
REVIEW AND FUTURE ISSUES ON SPENT NUCLEAR FUEL STORAGE
Saegusa, T.,Shirai, K.,Arai, T.,Tani, J.,Takeda, H.,Wataru, M.,Sasahara, A.,Winston, P.L. Korean Nuclear Society 2010 Nuclear Engineering and Technology Vol.42 No.3
The safety of metal cask and concrete cask storage technology has been verified by CRIEPI through several research programs on demonstrative testing for the interim storage of spent fuel. The results have been reflected in the safety requirements for dry casks issued by NISA/METI (Nuclear and Industrial Safety Agency, Ministry of Economy, Trade and Industry) of the Japanese government. On top of that, spent fuel integrity has been studied by the Japan Nuclear Energy Safety Organization (JNES). This paper reviews these research programs. Future issues include the long-term integrity of cask components and high burn-up spent fuel.
Observation of the Cosmic Near-Infrared Background with the CIBER rocket
MinGyu Kim,T. Matsumoto,Hyung Mok Lee,T. Arai,J. Battle,J. Bock,S. Brown,A. Cooray,V. Hristov,B. Keating,P. Korngut,Dae-Hee Lee,L. R. Levenson,K. Lykke,P. Mason,S. Matsuura,U. W. Nam,T. Renbarger,A. S 한국천문학회 2012 天文學會報 Vol.37 No.1
Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA
Akiyama, Y,Akutsu, T,Ando, M,Arai, K,Arai, Y,Araki, S,Araya, A,Aritomi, N,Asada, H,Aso, Y,Bae, S,Baiotti, L,Barton, M A,Cannon, K,Capocasa, E,Chen, C-S,Chiu, T-W,Cho, K,Chu, Y-K,Craig, K,Dattilo, V,Do Institute of Physics 2019 Classical and quantum gravity Vol.36 No.9
<P>A vibration isolation system called the Type-Bp system used for power recycling mirrors has been developed for KAGRA, the interferometric gravitational-wave observatory in Japan. A suspension of the Type-Bp system passively isolates an optic from seismic vibration using three main pendulum stages equipped with two vertical vibration isolation systems. A compact reaction mass around each of the main stages allows for achieving sufficient damping performance with a simple feedback as well as vibration isolation ratio. Three Type-Bp systems were installed in KAGRA, and were proved to satisfy the requirements on the damping performance, and also on estimated residual displacement of the optics.</P>
THE <i>COSMIC INFRARED BACKGROUND EXPERIMENT</i> ( <i>CIBER</i> ): THE NARROW-BAND SPECTROMETER
Korngut, P. M.,Renbarger, T.,Arai, T.,Battle, J.,Bock, J.,Brown, S. W.,Cooray, A.,Hristov, V.,Keating, B.,Kim, M. G.,Lanz, A.,Lee, D. H.,Levenson, L. R.,Lykke, K. R.,Mason, P.,Matsumoto, T.,Matsuura, IOP Publishing 2013 The Astrophysical journal, Supplement series Vol.207 No.2