F.R. Lecolley

Accurate measurements of delayed neutron data for reactor applications: methodology and application to 235U(nth,f)

Pierre Leconte, Dorian Belverge, David R. Bernard, A. Chebboubi et autres

Abstract Large inconsistencies still exist in nuclear data libraries regarding the kinetic parameters of delayed neutron (DN) precursors. As an example, there is a 17% gap between ENDF-B/VIII.0 and JEFF-3.3 on the average lifetime T1/2 of DN precursors from thermal fission of …

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Study of (n,α) reactions of interest for nuclear reactors: the case of19F(n,α)16N with SCALP detector

Aurélien Chevalier, F.R. Lecolley, G. Lehaut, J.L. Lecouey et autres

The19F(n,α)16N cross section is of great interest for the development of the next generation IV reactors that could potentially use molten fluoride salts. Significant differences (up to a factor of 3) have been observed for this nucleus regarding the (n,α) channel. In …

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Deep Subcriticality Determination Using the Source Jerk Integral Method in the SALMON Program

A. Kochetkov, A. Krása, N. Messaoudi, G. Vittiglio et autres

The Source Jerk Integral (SJI) method has been extensively used to determine the subcriticality in VENUS-F zero-power experiments since 2012. The obtained results were in the range from −5 $ to about −20 $ and concerned the subcriticalities of accelerator-driven system MYRRHA …

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Deep Sub-Criticality Determination Using the Source Jerk Integral Method in the SALMON Program

A. Kochetkov, A. Krása, N. Messaoudi, G. Vttiglio et autres

EXTENDED MSM METHOD TO ESTIMATE THE REACTIVITY OF A SUB-CRITICAL CORE DRIVEN BY AN ACCELERATOR BASED NEUTRON SOURCE

A. Billebaud, J.L. Lecouey, T. Chevret, S. Chabod et autres

The Modified Source Multiplication method is used to determine an unknown reactivity level of a reactor from a known one if one has access to the detector counting for both levels when the reactor is fed by a constant neutron source like …

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THE SOURCE JERK INTEGRALMETHOD FOR SUB-CRITICALITY MEASUREMENTS IN ADS

A. Kochetkov, A. Billebaud, S. Chabod, A. Krása et autres

Three sub-critical (SC) core configurations were investigated in the VENUS-F zero power reactor coupled with the GENEPI-3C accelerator. The SC10 and SC12 were a mock-up of a MYRRHA start-up core and SC11 represented a more complex MYRRHA core loaded with various types …

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The source jerk integral method for sub-critical measurements in ADS

A. Kochetkov, A. Billebaud, S. Chabod, A. Krása et autres

Three sub-critical (SC) core configurations were investigated in the VENUS-F zero power reactor coupled with the GENEPI-3C accelerator. The SC10 and SC12 were a mock-up of a MYRRHA start-up core and SC11 represented a more complex MYRRHA core loaded with various types …

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SCALP: a detector for (n,α) cross-section measurements

G. Lehaut, M. Bourgeot, B. Galhaut, D. Goupillière et autres

Neutron induced reactions on oxygen have been studied with strong interest because of the uncertainties generated on the helium production in fuel and on the neutron multiplication factor in nuclear reactors [1], [2]. Still large discrepancies exist and new measurements are welcome …

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Measurement of the delayed-neutron multiplicity and time constants in the thermal neutron induced fission of 235U at ILL

Daniela Foligno, Pierre Leconte, O. Sérot, B. Geslot et autres

Delayed-neutron (DN) data is essential in inherent reactor safety and reactor control since it is needed for the estimation of the reactivity. Nowadays, discrepancies among the data in various international databases (JEFF, ENDF, JENDL) are large and bring excessive conservatism in the …

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Reactivity monitoring of the accelerator driven VENUS-F subcritical reactor with the “current-to-flux” method

N. Marie, J.L. Lecouey, G. Lehaut, T. Chevret et autres

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The Neutrons for Science Facility at SPIRAL-2

X. Ledoux, M. Aïche, M. Avrigeanu, V. Avrigeanu et autres

The neutrons for science (NFS) facility is a component of SPIRAL-2, the new superconducting linear accelerator built at GANIL in Caen (France). The proton and deuteron beams delivered by the accelerator will allow producing intense neutron fields in the 100 keV-40 MeV …

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SCALP: Scintillating ionization chamber for ALPha particle production in neutron induced reactions

B. Galhaut, D. Durand, F.R. Lecolley, X. Ledoux et autres

The SCALP collaboration has the ambition to build a scintillating ionization chamber in order to study and measure the cross section of the α-particle production in neutron induced reactions. More specifically on 16O and 19F targets. Using the deposited energy (ionization) and …

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