Abstract
The MAESTRO experimental program has been designed to improve nuclear data uncertainty on a large range of materials used for detection, absorption, moderation and structures in LWRs. It consists of pile-oscillation and neutron activation experiments, carried out in the MINERVE low power facility. For this program, the core configuration has been designed to be representative of HZP (Hot Zero Power) conditions of a typical PWR. Samples of high purity elements have been manufactured with severe technological constraints to reach a target accuracy of ±2% (1σ) on the measurement. This paper presents a preliminary analysis of activation experiments, based on TRIPOLI4 Monte-Carlo calculations and various nuclear data libraries.
Highlights
This paper presents a preliminary analysis of activation experiments, based on TRIPOLI4 Monte-Carlo calculations and various nuclear data libraries
MAESTRO [1][2] is the follow-up in a series of experimental programs started more than thirty years ago in the MINERVE facility [3,4], which goal is to improve nuclear data uncertainties for Light Water Reactors (LWR) applications (GEN 2 and 3)
Due to the lack of validation for structural, moderating, detection and some absorbing materials, the MAESTRO experimental program was designed to improve the prediction of several neutronic parameters which are relevant for several LWR applications: core physics, instrumentation (EPRTM innovative instruments), reactivity control, criticality/safety, burn-up credit
Summary
MAESTRO [1][2] is the follow-up in a series of experimental programs started more than thirty years ago in the MINERVE facility [3,4], which goal is to improve nuclear data uncertainties for Light Water Reactors (LWR) applications (GEN 2 and 3). Due to the lack of validation (or insufficient accuracy) for structural, moderating, detection and some absorbing materials, the MAESTRO experimental program was designed to improve the prediction of several neutronic parameters which are relevant for several LWR applications: core physics (reactivity of structural elements), instrumentation (EPRTM innovative instruments), reactivity control, criticality/safety (contributions of various elements in concrete), burn-up credit. Some of the experiments are performed in support of the JHR irradiation reactor, currently being built in Cadarache. This reactor will use metallic fuel plates of U3Si2 cladded with aluminum, a beryllium reflector and hafnium control rods.
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