Interpretation of PERLE Experiment for the Validation of Iron Nuclear Data Using Monte Carlo Calculations

Vaglio–Gaudard, C.; Santamarina, A.; Blaise, Patrick; Litaize, O.; Lyoussi, A.; Noguère, G.; Ruggieri, J. M.; Vidal, Jean-François

doi:10.13182/nse09-91

Cited by 21 publications

(9 citation statements)

References 4 publications

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“…Finally, this will add a radial swing to the power map. That is why this cross section held a lot of attention with the PERLE program [21,22] which helped to produce the covariances included in COMAC V0.…”

Section: Resultsmentioning

confidence: 99%

A stochastic method to propagate uncertainties along large cores deterministic calculations

Volat

Gastaldi

Santamarina

2018

EPJ Nuclear Sci. Technol.

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Deterministic uncertainty propagation methods are certainly powerful and time-sparing but their access to uncertainties related to the power map remains difficult due to a lack of numerical convergence. On the contrary, stochastic methods do not face such an issue and they enable a more rigorous access to uncertainty related to the PFNS. Our method combines an innovative transport calculation chain and a stochastic way of propagating uncertainties on nuclear data: first, our calculation scheme consists in the calculation of assembly self-shielded cross sections and a pin-by-pin flux calculation on the whole core. Validation was done and the required CPU time is suitable to allow numerous calculations. Then, we sample nuclear cross sections with consistent probability distribution functions with a correlated optimized Latin Hypercube Sampling. Finally, we deduce the power map uncertainties from the study of the output response functions. We performed our study on the system described in the framework of the OECD/NEA Expert Group in Uncertainty Analysis in Modelling. Results show the 238U inelastic scattering cross section, the 235U PFNS, the elastic scattering cross section of 1H and the 56Fe cross sections as major contributors to the total uncertainty on the power map: the power tilt between central and peripheral assemblies using COMAC-V2 covariance library amounts to 5.4% (1σ) (respectively 7.4% (1σ) using COMAC-V0).

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Section: Resultsmentioning

confidence: 99%

A stochastic method to propagate uncertainties along large cores deterministic calculations

Volat

Gastaldi

Santamarina

2018

EPJ Nuclear Sci. Technol.

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“…In the context of the present work, the addition of such a background, potentially coming from a direct capture component, was checked with data from the integral measurement PERLE, performed at the EOLE reactor of CEA, Cadarache. The experiment was designed to validate nuclear data on iron and is described in [8]. A thick stainless steel reflector of 22 cm was used, hosting metallic activation foils ("dosimeters ") and miniature fission chambers at different distances from the core centre.…”

Section: Capture Measurementsmentioning

confidence: 99%

Evaluation of neutron induced reactions on ⁵⁶Fe with CONRAD

et al. 2020

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The evaluation of the 56Fe neutron induced reactions is currently ongoing at the CEA-Cadarache using the code CONRAD, with the goal to cover the whole energy range from the Resolved Resonance Region to the continuum and estimate the corresponding uncertainties and covariance matrices. Some first results and issues occurred from this work are presented and discussed here, more specifically on the analysed transmission and capture data in the Resolved Resonance Region, as well as the optical and statistical model calculations in the fast neutron energy range.

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“…PERLE [11] is an integral experiment performed in the zero-power reactor EOLE at CEA Cadarache. One of the PERLE purpose is to estimate the local gamma heating in a heavy reflector for the 3 rd generation reactors.…”

Section: Application On the Perle Experiments Interpretationmentioning

confidence: 99%

New evaluation of photon production for JEFF-3

Ravaux

Bernard

Santamarina

2013

EPJ Web of Conferences

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Abstract. In this work, new gamma production evaluations are proposed for JEFF-3 for crucial nuclei for power reactors and Jules Horowitz Reactor: Fe, Ag, In, Cd and Gd. We specifically work on two nuclear reactions: the inelastic scattering and the radiative capture. We performed gamma production multiplicities, angular distributions and energy spectrum for incident neutron energies between 10 -11 and 20 MeV by simulating the whole intranuclear gamma cascade. For this simulation, the discrete part of the nuclei level schemes came from the RIPL2.0 library and the latest EGAF measurements carried out at Budapest facility. The EGAF measurements are available in the adopted IAEA library. The continuum level scheme part has been estimated with a level density model: the Gilbert-Cameron model and a strength function model: the Generalized Lorentzian model. Then, the gamma cascade has been simulated using TALYS which is a nuclear reaction modeling code.

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Interpretation of PERLE Experiment for the Validation of Iron Nuclear Data Using Monte Carlo Calculations

Cited by 21 publications

References 4 publications

A stochastic method to propagate uncertainties along large cores deterministic calculations

A stochastic method to propagate uncertainties along large cores deterministic calculations

Evaluation of neutron induced reactions on ⁵⁶Fe with CONRAD

New evaluation of photon production for JEFF-3

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Interpretation of PERLE Experiment for the Validation of Iron Nuclear Data Using Monte Carlo Calculations

Cited by 21 publications

References 4 publications

A stochastic method to propagate uncertainties along large cores deterministic calculations

A stochastic method to propagate uncertainties along large cores deterministic calculations

Evaluation of neutron induced reactions on 56Fe with CONRAD

New evaluation of photon production for JEFF-3

Contact Info

Product

Resources

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Evaluation of neutron induced reactions on ⁵⁶Fe with CONRAD