A5071777060- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Nuclear Materials and Properties
- Nuclear physics research studies
- Graphite, nuclear technology, radiation studies
- Magnetic confinement fusion research
- Radiation Detection and Scintillator Technologies
- Nuclear and radioactivity studies
- Superconducting Materials and Applications
- Nuclear Engineering Thermal-Hydraulics
- Markov Chains and Monte Carlo Methods
- Fault Detection and Control Systems
- Atomic and Subatomic Physics Research
- Geophysical Methods and Applications
- Radioactive element chemistry and processing
- Cultural Heritage Materials Analysis
- Probabilistic and Robust Engineering Design
- Target Tracking and Data Fusion in Sensor Networks
- Model Reduction and Neural Networks
- Advanced NMR Techniques and Applications
- Rocket and propulsion systems research
- Diverse Scientific and Engineering Research
- Healthcare Systems and Practices
- Forecasting Techniques and Applications
- Radioactivity and Radon Measurements
CEA Cadarache
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Direction des énergies
2012-2021
Abstract The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutron-induced interactions with the major actinides $$^{235}\hbox {U}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>235</mml:mn></mml:msup><mml:mtext>U</mml:mtext></mml:mrow></mml:math> , $$^{238}\hbox /><mml:mn>238</mml:mn></mml:msup><mml:mtext>U</mml:mtext></mml:mrow></mml:math> $$^{239}\hbox {Pu}$$...
This paper presents a comparison of homogenization techniques implemented in the APOLLO3 platform for transport core calculations: standard scalar flux weighting and new flux–moment homogenization, different combinations with (or without) leakage models. Besides historical B1-homogeneous model, B-heterogeneous one has indeed been recently two/three-dimensional-transport solver using method characteristics. First analyses have performed on very simple Sodium Fast Reactor regular hexagonal...
To take into account the reactivity loss in spent fuels, an experimental program was set up 1993 at CEA-Cadarache, France, oscillating separated fission products (FPs) MINERVE reactor. Reactivity worth measurements of small samples allow extraction information about nuclear data studied isotopes. A fully validated calculation scheme has been implemented to interpret pile-oscillation measurements. Therefore, over experiment ratios can be accurately transposed trends integral capture cross...
As model parameters, necessary ingredients of theoretical models, are not always predicted by theory, a formal mathematical framework associated to the evaluation work is needed obtain best set parameters (resonance optical fission barrier, average width, multigroup cross sections) with Bayesian statistical inference comparing theory experiment. The rule related this methodology estimate posterior density probability function solving an equation following type: pdf(posterior) ∼ pdf(prior) ×...
Due to the importance of radiation damage materials in nuclear facilities, it is interest accurately calculate and corresponding uncertainty. The CONRAD code developed at CEA Cadarache for evaluating data uncertainties using various methods. Different Displacement per Atom (DPA) models have been recently implemented perform calculation, sensitivity analysis, uncertainty propagation cross sections. current version able compute section associated covariance matrix from model parameters DPA...
The CONRAD code is an object-oriented software tool developed at CEA since 2005. It aims providing nuclear reaction model calculations, data assimilation procedures based on Bayesian inference and a proper framework to treat all uncertainties involved in the evaluation process: experimental (statistical systematic) as well parameter uncertainties. This paper will present status of CONRAD-V1 developments concerning theoretical aspects. Each development illustrated with examples calculations...
This paper presents simple models developed to generate covariances between observable and latent variables. The methodology consists of using “variance penalty” terms as a measure the contribut...