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Kitabata, Takuya; Shimono, Kimihiro; sekiguchi, mineo; Matsushima, Akira
JNC TN4410 2003-004, 42 Pages, 2003/03
JNC-TN4410-2003-004.pdf:11.33MB
None
gas turbine power generation system (User's manual)Otsubo, Akira; Sekiguchi, Nobutada
PNC TN9520 95-002, 66 Pages, 1995/02
This analysis program code STEDFAST; Space, TErrestrial and Deep sea FAST reactor gas tubine system; is used to get the adequate values of system parameters on fast reactor gas turbine power generation systems used as power sources for deep sea, space and terrestrial cogeneration. Characteristics of the code are as follows. Objective systems of the code are a deep sea, a space and a terrestrial reactors. Primary coolants of the systems are NaK, Na, Pb and Li. Secondary coolant is the mixture gas of He and Xe. The ratio of He and Xe is arbitrary. Modeling of components in the systems was performed so that detailed modeling might be capable in future and that a transient analytical code could be easily made by using the code. A progra㎜ing language is MAC-FORTRAN. The code can be easily used in a personal computer. The code made possible instant calculation of various state values in a Brayton cycle, understanding the effects of many parameters on thermal efficiency and finding the most adequate values of the parameters. From now on, detailed modeling of the components will be performed. After that, the transient program code will be made.
Otsubo, Akira; Haga, Kazuo; Sekiguchi, Nobutada
PNC TN9410 92-252, 62 Pages, 1992/05
[Objective] Study on the concept of a fast reactor gas turbine cogeneration system used near a small town, where there are not a large number of engineers, in a cold district distant from a large city. [Method] The population of the small town is supposed 200 to 2000 thousands. The study was performed on three kinds of plant systems, that is, 100, 50 and 10 MWe's. The design of a high temperature fast reactor previously studied for hydrogen production was used for a primary system. A closed Brayton cycle (CBC) was adopted for the secondary system to generate electric power. These plant systems have not the accident occurence possibility of sodium-water reaction since a steam turbine is not used for electric power generation. Water treatment is not necessary, too. In order that the gas turbine system has high thermal efficiency, the reactor vessel coolant outlet temperature is desirable to be high. Therefore the temperature was set to be 650 to 700
C which is considered the highest temperature attained by steel and nickel alloy structural material. The temperature is higher than that of usual FBR's by 100 to 150C. Exhausted heat from the closed Brayton cycle is used for cogenration like district heating. [Result] The following plant systems were found to be possible from the conceptual design study on the above three kinds of power scale plants. [100 and 50MWe systems] Both systems adopted two loops for primary system. The former adopted four loops design and the latter two loops design for the secondary system, respectively. The reactor coolant temperature was 700C at the reactor outlets for both systems. An non-intercooling type compressor was used in the secondary system. The thermal efficiency of the CBC was about 24%. The scales of the building containing the secondary system were 31m in width, 40m in depth and 30m in height for the former and 31m in width, 22m in depth and 30m in height for the latter. [10MWe system] A ...
Otsubo, Akira; Haga, Kazuo; Sekiguchi, Nobutada
PNC TN9410 91-126, 118 Pages, 1991/03
A conceptual design study has been performed in order to establish an outline image of the High Temperature Fast Reactor (HTFR) which has been aimed to produce the hydrogen as a most promising energy source in 21st century. The study covers the following systems. (1)Reactor system (2)Cooling system (3)Safety system and containment From results of the study, the concepts of the compactized reactor system and the heat exchanging system has been presented. Based on the concept obtained, a preliminary estimate of the cost of hydrogen produced by the HTFR was also conducted in another report. Result revealed that the cost is compatible with that by the High Temperature Gas-cooled Reactor (HTG CR) already published.
Sekiguchi, Akira*;
JAERI-M 86-060, 267 Pages, 1986/04
no abstracts in English
Sekiguchi, Akira*; Nakazawa, Masaharu*; ; ; ;
Nihon Genshiryoku Gakkai-Shi, 28(1), p.71 - 81, 1986/00
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)no abstracts in English
Sekiguchi, Akira*; Nakazawa, Masaharu*; ; Ueda, Nobuyuki*
PNC TJ960 84-01, 56 Pages, 1984/01
None
Kosako, Toshiso*; Nakazawa, Masaharu*; Wakabayashi, Hiroaki*; Sekiguchi, Akira*
PNC TJ260 78-06, 97 Pages, 1976/11
He proportional counter was employed to determine the fast and intermediateneutron spectra of wide energy region. The mixed gas (He, Kr) type counterresponse and the spectrum unfolding code were prepared and applied to some neutronfields. The counter response calculation was performed by using the Monte Carlocode,paying regards to dealing of the particle range calculation of the mixed gas.An experiment was carried out by using the van de Graaff accelerator to check theresponse function. The spectrum unfolding code was prepared so that it mayhave the function of automatic evaluation of the higher energy spectum's effectto the pulse hight distribution of the lower energy region. The neutron spectraof the various neutron fields were measured and compared with the calculations suchas the discrete ordinate Sn calculations. It became clear that the techniquedeveloped here can be applied to the practical use in the neutron energy rangefrom about 150 KeV to 5 MeV.
Kaneko, Yoshihika; Iijima, Tsutomu; Mizuho, Mitsuru; Fuse, Takayoshi*; Fujita, Yoshiaki*; Nakazawa, Masaharu*; Sekiguchi, Akira*; Kimura, Itsuro*
Nihon Genshiryoku Gakkai-Shi, 18(2), p.77 - 88, 1976/02
no abstracts in English
Nishiuchi, Mamiko; Sakaki, Hironao; Pirozhkov, A. S.; Sagisaka, Akito; Kon, Akira; Fukuda, Yuji; Kiriyama, Hiromitsu; Dover, N.*; Sekiguchi, Kentaro; Ogura, Koichi; et al.
no journal, ,
Petawatt class laser systems are in nowadays almost ready to work in all over the world. High energy particles accelerated by the interaction between laser pulses from high intensity laser system and the material shows interesting and particular parameters. Therefore those attract many fields of applications. High contrast and ultra high intensity laser system J-KAREN at KPSI is now under upgrading for achieving highest energy ion beams. No laser system with pulse duration less than 100 fs has demonstrated 100 MeV class proton acceleration in the world. To achieve high energy ions requires higher intensity laser on the target. We report on this presentation the status of the upgrading and the experimental results obtained at the first light experiment.
Fukuda, Yuji; Kanasaki, Masato*; Sekiguchi, Kentaro; Sugiyama, Akira; Kondo, Kiminori
no journal, ,
In the characterization of ion beams using CR-39, information on ion energies, incident angles, and ion species can be extracted from the geometrical structure of the etch pits. In this study, the spatial distribution of accelerated ions has been measured by using 5
5 cm
wide CR-39 detectors. In addition, by measuring the etch pit open mouth radius and the gray scale, the energy distributions of accelerated ions were also evaluated.
