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Journal Articles

Performance evaluation of a resonance ionization mass spectrometer developed for the FFDL system of fast reactors

Iwata, Yoshihiro; Ito, Chikara; Harano, Hideki*; Iguchi, Tetsuo*

Journal of Nuclear Science and Technology, 51(4), p.465 - 475, 2014/04

https://doi.org/10.1080/00223131.2014.874960

Times Cited Count：4 Percentile：34.57(Nuclear Science & Technology)

To prevent a fuel failure event from becoming a serious radiation accident, sodium-cooled fast reactors are equipped with a system for failed fuel detection and location (FFDL). The FFDL instrument employed in the prototype fast breeder reactor Monju is based on the gas tagging method, in which precise and accurate measurements of krypton and xenon isotope ratios ( $^{78}$ Kr/ $^{80}$ Kr, $^{82}$ Kr/ $^{80}$ Kr and $^{126}$ Xe/ $^{129}$ Xe) must be performed in a short time. Burnup measurements also contribute to accurate determination of $^{82}$ Kr/ $^{80}$ Kr. We have developed a highly sensitive resonance ionization mass spectrometer for the isotopic analyses, which uses resonance ionization of Kr and Xe atoms by a pulsed laser at wavelengths of 216.7 nm and 249.6 nm, respectively. In evaluating the performance of our spectrometer, we find that systematic errors caused by isotope shifts can be reduced to negligible levels, and that statistical errors of 3% at a nuclide concentration of 7 ppt can be achieved with a single measurement time of about 40 minutes for each Kr and Xe isotope ratio. This means that, within one hour, about 200 fuel assemblies can be individually identified with a probability of 99%, verifying the applicability of our spectrometer to the FFDL system of fast reactors.

Journal Articles

High sensitive and reliable FFDL technique for Monju using laser resonance ionization mass spectrometry

Aoyama, Takafumi; Ishikawa, Takashi; Ito, Chikara; Iwata, Yoshihiro; Harano, Hideki*

Transactions of the American Nuclear Society, 106(1), p.611 - 613, 2012/06

We studied the failed fuel detection and location (FFDL) system by means of laser resonance ionization mass spectrometry (RIMS). The applicability of the RIMS system for Monju and its installation were investigated in this study. It was found that the RIMS is able to identify the neighboring tag gas which is used for Monju with the 68% reliability. The newly designed RIMS system can be accommodated in the present facility and can be connected to primary cover gas lines without affects to the current FFDL function of the conventional system.

Journal Articles

High sensitive and reliable FFDL technique for SFR using laser resonance ionization mass spectrometry

Ito, Chikara; Iwata, Yoshihiro; Harano, Hideki*; Iguchi, Tetsuo*; Aoyama, Takafumi

Transactions of the American Nuclear Society, 102(1), p.416 - 417, 2010/06

no abstracts in English

Journal Articles

Design study around beam window of ADS

Oigawa, Hiroyuki; Tsujimoto, Kazufumi; Kikuchi, Kenji; Kurata, Yuji; Sasa, Toshinobu; Umeno, Makoto*; Nishihara, Kenji; Saito, Shigeru; Mizumoto, Motoharu; Takano, Hideki*; et al.

Proceedings of 4th International Workshop on the Utilisation and Reliability of High Power Proton Accelerators, p.325 - 334, 2005/11

The Japan Atomic Energy Research Institute (JAERI) is conducting the research and development (R&D) on the Accelerator-Driven Subcritical System (ADS) for the effective transmutation of minor actinides (MAs). The ADS proposed by JAERI is the 800 MWth, Pb-Bi cooled, tank-type subcritical reactor loaded with (MA+Pu) nitride fuel. The Pb-Bi is also used as the spallation target. In this study, the feasibility of the ADS was discussed with putting the focus on the design around the beam window. The partition wall was placed between the target region and the ductless-type fuel assemblies to keep the good cooling performance for the hot-spot fuel pin. The flow control nozzle was installed to cool the beam window effectively. The thermal-hydraulic analysis showed that the maximum temperature at the outer surface of the beam window could be repressed below 500 $^{circ}$ C even in the case of the maximum beam power of 30 MW. The stress caused by the external pressure and the temperature distribution of the beam window was also below the allowable limit.

JAEA Reports

Conceptual study of transmutation experimental facility, 2; Study on ADS target test facility

Sasa, Toshinobu; Umeno, Makoto*; Mizubayashi, Hiroshi*; Mori, Keijiro*; Futakawa, Masatoshi; Saito, Shigeru; Kai, Tetsuya; Nakai, Kimikazu*; Zako, Akira*; Kasahara, Yoshiyuki*; et al.

JAERI-Tech 2005-021, 114 Pages, 2005/03

JAERI-Tech-2005-021.pdf:9.66MB

To perform the research and development for accelerator-driven system (ADS), Japan Atomic Energy Research Institute (JAERI) plans to build a Transmutation Experimental Facility under the JAERI-KEK joint J-PARC program. Transmutation Experimental Facility consists of two buildings, Transmutation Physics Experimental Facility to make reactor physics experiment with subcritical core, and ADS Target Test Facility for the preparation of irradiation database for various structural materials. In this report, purpose to build, experimental schedule, and design study of the ADS target test facility with drawer type spallation target are summarized.

Journal Articles

Beam-palarization asymmetries for the (, $^{+}$ ) and (, $^{+}$ ) $^{0}$ reactions for $_{gamma}$ =1.5-2.4 GeV

Zegers, R. G. T.*; Sumihama, Mizuki*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Dat, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; et al.

Physical Review Letters, 91(9), p.092001_1 - 092001_4, 2003/08

https://doi.org/10.1103/PhysRevLett.91.092001

Times Cited Count：127 Percentile：95.11(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Evidence for a narrow = +1 Baryon resonance in photoproduction from the neutron

Nakano, Takashi*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Date, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; Fujiwara, Mamoru; et al.

Physical Review Letters, 91(1), p.012002_1 - 012002_4, 2003/07

https://doi.org/10.1103/PhysRevLett.91.012002

Times Cited Count：998 Percentile：99.88(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron and ray radiography using a multi-color converter

Iwata, Yoshihiro; Ito, Chikara; Harano, Hideki*; Aoyama, Takafumi

no journal, ,

no abstracts in English

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Performance evaluation of a resonance ionization mass spectrometer developed for the FFDL system of fast reactors

High sensitive and reliable FFDL technique for Monju using laser resonance ionization mass spectrometry

High sensitive and reliable FFDL technique for SFR using laser resonance ionization mass spectrometry

Design study around beam window of ADS

Conceptual study of transmutation experimental facility, 2; Study on ADS target test facility

Beam-palarization asymmetries for the (, $^{+}$ ) and (, $^{+}$ ) $^{0}$ reactions for $_{gamma}$ =1.5-2.4 GeV

Evidence for a narrow = +1 Baryon resonance in photoproduction from the neutron

Neutron and ray radiography using a multi-color converter

Reduction of argon background in the tag gas analysis for failed fuel detection and location of the fast reactor

The Study of highly sensitivity technique for sodium leak detection using laser resonance ionization mass spectrometry to improve fast reactor plant safety

Development of a laser optical system for precise isotopic analysis of krypton and xenon in argon

The Study of highly sensitivity technique for sodium leak detection using laser resonance ionization mass spectrometry

Background suppression in the noble gas isotopic analysis by delayed ionization via the metastable state

Upgrade of fast reactor FFDL by means of laser resonance ionization mass spectrometry, 2-2; Development of a laser optical system for high accuracy analysis of the tag gas in fuel rods

Upgrade of the resonance ionization mass spectrometer for precise identification of failed fuel in a fast reactor

Background removal in the isotopic analysis of krypton and xenon by delayed ionization via the metastable state

Upgrade of fast reactor FFDL by means of laser resonance ionization mass spectrometry, 3-2; Improvement of the optical system of the spectrometer for high accuracy analysis of the tag gas in fuel rods

Development of fuel failure monitoring in fast reactor using laser mass spectrometry

Application of resonance ionization mass spectrometry to sodium leak detection and failed fuel identification techniques in the fast reactors

Upgrade of fast reactor FFDL by means of laser resonance ionization mass spectrometry, 4; Evaluation of the reliability of the gas tagging method for application to the FFDL system of the fast reactor