Skip to Main content Skip to Navigation
Theses

Analyse et propagation des incertitudes associées à la dépressurisation de l’Hélium 3 sur les transitoires de puissance du réacteur CABRI

Olivier Clamens 1
1 LP2E - Laboratoire des Programmes Expérimentaux et d'Essais en Sûreté
SPESI - Service Physique EXpérimentale, d'essais en Sûreté et d'Instrumentation : DEN/DER
Abstract : CABRI is a pool type pulsed reactor designed for studying pre-irradiated nuclear fuel behavior under RIA (Reactivity Initiated Accident) conditions.The helium-3 depressurization from the transient rods system allows the insertion of up to 4 reactivity mainly countered by the Doppler effect when the power reaches in few milliseconds up to 200,000 times the initial 100~kW power.This thesis presents the improvements added to the power transients prediction and the associated uncertainties studies.The point kinetics calculation coupled with 1D thermal-hydraulics and heat transfer has been improved by the addition of surrogate models based on experimental analysis and Best-Estimate calculations of the helium-3 depressurization and of the reactivity effects and of the kinetics parameters.The power transients modeling improvements have a positiv impact on the CABRI tests prediction.The propagation of the experimental and of the modeling uncertainties was realized with the SPARTE code and the URANIE uncertainty platform.Finally, the power transients characteristics optimization is approached in order to improve the CABRI experiments designing.
Document type :
Theses
Complete list of metadatas

Cited literature [108 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01975146
Contributor : Abes Star :  Contact
Submitted on : Wednesday, January 9, 2019 - 11:37:07 AM
Last modification on : Wednesday, September 9, 2020 - 10:24:11 AM

File

CLAMENS_2018_archivage.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01975146, version 1

Collections

Citation

Olivier Clamens. Analyse et propagation des incertitudes associées à la dépressurisation de l’Hélium 3 sur les transitoires de puissance du réacteur CABRI. Physique Nucléaire Expérimentale [nucl-ex]. Université Grenoble Alpes, 2018. Français. ⟨NNT : 2018GREAI061⟩. ⟨tel-01975146⟩

Share

Metrics

Record views

282

Files downloads

105