Global Results from Deterministic and Stochastic Analysis of the MUSE-4 Experiments on the Neutronics of Accelerator-Driven Systems

Lebrat, J. F.; Aliberti, G.; D’Angelo, Antonio; Billebaud, A.; Brissot, R.; Brockmann, Hans; Carta, M.; Destouches, C.; Gabrielli, F.; González, Enrique; Hogenbirk, A.; Klein-Meulenkamp, R.; Brun, C. Le; Liatard, E.; Mellier, F.; Messaoudi, Nadia; Peluso, V.; Plaschy, M.; THOMAS, M; Villamarı́n, D.; Vollaire, J.

doi:10.13182/nse05-100

Cited by 34 publications

(12 citation statements)

References 7 publications

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“…[1][2][3][4][5][6][7] These transmuters are referred to as Accelerators Driven Systems (ADS). Research programs for partitioning and transmuting nuclear waste by ADS are under development in Japan, [8][9][10][11] China, 12 Europe, [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] and Russia. [32][33][34] In Europe, the MUSE program was carried out at the MASURCA facility in Cadarache, France.…”

Section: Introductionmentioning

confidence: 99%

“…[32][33][34] In Europe, the MUSE program was carried out at the MASURCA facility in Cadarache, France. [13][14][15][16][17][18][19] The MASURCA facility consists of a fast subcritical reactor, loaded with MOX fuel and sodium, coupled with a deuteron accelerator, and it operated at low power of less than 5 kW. Another set of experiments has been carried out within the TRIGA Accelerator Driven Experiment (TRADE) program.…”

Section: Introductionmentioning

confidence: 99%

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Deterministic and Monte Carlo modeling and analyses of YALINA-THERMAL subcritical assembly.

Talamo

Gohar

2010

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deterministic and Monte Carlo modeling and analyses of YALINA-THERMAL subcritical assembly.

Talamo

Gohar

2010

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“…Research and development of an accelerator-driven system (ADS) has become of great interest in recent years [1][2][3]. An 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%

Determination of prompt-neutron decay constant from phase shift between beam current and neutron detection signals for an accelerator-driven system in the Kyoto University Critical Assembly

Sakon

Hashimoto

Sugiyama

et al. 2014

Journal of Nuclear Science and Technology

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A unique power spectral analysis for a subcritical reactor system driven by a pulsed 14 MeV neutron source was carried out at the Kyoto University Critical Assembly (KUCA). In this analysis, a complex cross-power spectral density between time-sequence signal data from an accelerator beam ammeter and a neutron detector was measured to determine the prompt-neutron decay constant of an accelerator-driven system (ADS) from the phase data of the spectral density. Assuming the one-point kinetics model, in theory, the decay constant can be arithmetically derived from the phase at the integral multiples of the pulse repetition frequency. However, the actual derivation from the phase at a pulse repetition frequency of 20 Hz considerably underestimated the prompt-neutron decay constant, compared with that obtained by a previous pulsed neutron experiment, and the derived decay constant apparently decreased with an increase in the multiple of the pulsed repetition frequency. Considering a lag time in detector response, the above underestimation and the above apparent decrease were solved to obtain the consistent decay constant. While both previous power spectral analysis and Feynman-α analysis for pulsed neutron source require non-linear least-squares fits of the respective complicated formulae, the present analysis makes the fitting unnecessary except at regular calibration of the lag time. This feature is advantageous for a robust online monitoring of subcritical reactivity of an actual ADS.

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“…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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Global Results from Deterministic and Stochastic Analysis of the MUSE-4 Experiments on the Neutronics of Accelerator-Driven Systems

Cited by 34 publications

References 7 publications

Deterministic and Monte Carlo modeling and analyses of YALINA-THERMAL subcritical assembly.

Deterministic and Monte Carlo modeling and analyses of YALINA-THERMAL subcritical assembly.

Determination of prompt-neutron decay constant from phase shift between beam current and neutron detection signals for an accelerator-driven system in the Kyoto University Critical Assembly

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

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