Neutronic Studies in Support of Accelerator-Driven Systems: The MUSE Experiments in the MASURCA Facility

Soule, R.; Assal, W.; Chaussonnet, P.; Destouches, C.; Domergue, Christophe; Jammes, C.; Laurens, J. M.; Lebrat, J. F.; Mellier, F.; Perret, G.; Rimpault, G.; Servière, H.; Imel, G.; Thomas, Glyn; Villamarı́n, D.; González‐Romero, E.; Plaschy, M.; Chawla, R.; Kloosterman, Jan Leen; Rugama, Y.; Billebaud, A.; Brissot, R.; Heuer, D.; Kerveno, M.; Brun, C. Le; Liatard, E.; Loiseaux, J.M.; Méplan, O.; Merle, E.; Perdu, Fabien; Vollaire, J.; Baeten, P.

doi:10.13182/nse01-13c

Cited by 120 publications

(46 citation statements)

References 9 publications

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“…Research and development of the accelerator-driven system (ADS) has become of great interest in recent years [1][2][3]. ADS is expected to provide capabilities for power generation, nuclear waste transmutation, and a reliable neutron source for research purposes [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Power spectral analysis for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source

Sakon

Hashimoto

Sugiyama

et al. 2013

Journal of Nuclear Science and Technology

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A series of power spectral analyses for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source was carried out at Kyoto University Critical Assembly (KUCA), to determine the promptneutron decay constant of the accelerator-driven system (ADS). The cross-power spectral density between time-sequence signal data of two neutron detectors was composed of a familiar continuous reactor noise component and many delta-function-like peaks at the integral multiple of pulse repetition frequency. The prompt-neutron decay constant inferred from the reactor noise component of the cross-power spectral density was consistent with that obtained by a pulsed neutron experiment. However, the reactor noise component of the auto-power spectral density of each detector was hidden by a white chamber noise in the higher-frequency range and this feature resulted in a considerable underestimation of the decay constant. For several runs with a low pulse-repetition frequency, furthermore, we attempted to infer the decay constant from point data of the delta-function-like peaks. The analysis for a run under a slightly subcritical state resulted in the consistent decay constant; however, those for other runs under significantly subcritical states underestimated the decay constant. Considering the contribution of a spatially higher mode to the point data, the above underestimation was solved to obtain the consistent decay constant. While the Feynman-α formula for a pulsed neutron source is too complicated to be fitted directly to variance-to-mean ratio data, the present analysis on frequency domain is much simpler and the conventional formula based on the first-order reactor transfer function is available for fitting to power spectral density data.

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Section: Introductionmentioning

confidence: 99%

Power spectral analysis for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source

Sakon

Hashimoto

Sugiyama

et al. 2013

Journal of Nuclear Science and Technology

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show abstract

“…Research and development of accelerator-driven system (ADS) has become of great interest in recent years [1][2][3][4][5][6][7][8]. The reactor system is operated at a subcritical state to enhance nuclear safety.…”

Section: Introductionmentioning

confidence: 99%

Measurement of large negative reactivity of an accelerator-driven system in the Kyoto University Critical Assembly

Sakon

Hashimoto

Maarof

et al. 2013

Journal of Nuclear Science and Technology

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Large negative reactivity of a subcritical system driven by a pulsed 14 MeV neutron source has been measured in the Kyoto University Critical Assembly. The subcriticality of the accelerator-driven system (ADS) ranged in effective multiplication factor roughly from 0.98 to 0.92, which corresponded to an operational range of an actual ADS proposed by Japan Atomic Energy Agency. As the measurement technique, pulsed neutron method, power spectral analysis for pulsed neutron source, accelerator-beam trip method were employed. From neutron count decay data obtained by the pulsed neutron experiment, not only the promptneutron decay constant of fundamental mode but also a higher spatial mode could be derived. The subcriticality was also determined from the fundamental decay constant. The measured cross-power spectral density consisted of a familiar correlated reactor-noise component and many uncorrelated delta-functionlike peaks at the integral multiple of pulse repetition frequency. The fundamental prompt-neutron decay constant, i.e., the subcriticality determined from the latter uncorrelated peaks was consistent with that obtained by the above pulsed neutron experiment. However, the magnitude of the former correlated component was reduced with an increase in the subcriticality and eventually this component became almost white at deeply subcritical state ranging in the multiplication factor under 0.95. Consequently, the determination of the decay constant from the correlated component was impossible under such a subcritical state. As data analysis method for the beam trip experiment, both the conventional integral count method and the least-squares inverse kinetics method (LSIKM) were employed. The LSIKM analysis led to the consistent subcriticality with that obtained by the pulsed neutron experiment, while the integral count method significantly underestimated the subcriticality. This underestimation originated from a residual background count, which was maintained after the beam trip. The LSIKM was mostly not influenced by such a slight count rate.

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“…Within this concept, the incineration of LWRs waste takes advantage of the low capture to fission ratio of transuranic isotopes in the fast energy spectrum. The ADS utilization for energy production has been suggested by Rubbia et al 2 The ADS experimental research has been performed with small research facilities around the world such as MASURCA, 3 TRADE, 4 and YALINA. 5 The present study is focused on characterizing the YALINABooster facility as defined in the IAEA benchmark specifications.…”

Section: Introductionmentioning

confidence: 99%

“…The microscopic cross sections of these isotopes are plotted in Figure 59. The (n,p) cross section of 3 He is the largest cross section and it shows no resonances. The reaction rates of 115 In, 197 Au and 55 Mn are calculated by modeling the irradiation capsules and the sample holder as specified in the IAEA benchmark specifications.…”

mentioning

confidence: 95%

Monte Carlo modeling and analyses of YALINA-booster subcritical assembly part 1: analytical models and main neutronics parameters.

Talamo¹,

Gohar²

2008

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Neutronic Studies in Support of Accelerator-Driven Systems: The MUSE Experiments in the MASURCA Facility

Cited by 120 publications

References 9 publications

Power spectral analysis for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source

Power spectral analysis for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source

Measurement of large negative reactivity of an accelerator-driven system in the Kyoto University Critical Assembly

Monte Carlo modeling and analyses of YALINA-booster subcritical assembly part 1: analytical models and main neutronics parameters.

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