State of the art on nuclear heating in a mixed (n/γ) field in research reactors

Amharrak, H.; Salvo, J. Di; Lyoussi, A.; Carette, M.; Reynard-Carette, C.

doi:10.1016/j.nima.2014.02.039

Cited by 9 publications

(6 citation statements)

References 36 publications

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“…Indeed the expected nuclear heating rate is about 20 W.g −1 for nominal capacity of 100 MW [1], against currently 13 W.g −1 in the irradiation OSIRIS reactor at CEA-Saclay [2]. This level of nuclear heating rate should be compared with measurements performed in critical mock-up reactors of very low power, such as MINERVE and EOLE at the CEA/Cadarache, where nuclear heating reach a value from 10 −7 to 10 −6 W.g −1 [3,4].…”

Section: Introductionmentioning

confidence: 93%

Monte Carlo Simulation Study of a Differential Calorimeter Measuring the Nuclear Heating in Material Testing Reactors

Amharrak

Reynard-Carette

Lyoussi

et al. 2016

EPJ Web of Conferences

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Abstract. The nuclear heating measurements in Material Testing Reactors (MTRs) are crucial for the study of nuclear materials and fuels under irradiation. The reference measurements of this nuclear heating are especially performed by a differential calorimeter including a graphite sample material. Then these measurements are used for other materials, other geometries, or other experimental conditions in order to predict the nuclear heating and thermal conditions induced in the irradiation devices. This paper will present new simulations with MCNP Monte-Carlo transport code to determine the gamma heating profile inside the calorimeter. The whole complex geometry of the sensor has been considered. We use as an input source in the model, the photon spectra calculated in various positions of CARMEN-1 irradiation program in OSIRIS reactor. After a description of the differential calorimeter device, the MCNP modeling used for the calculations of radial profile of nuclear heating inside the calorimeter elements will be introduced. The obtained results of different simulations will be detailed and discussed in this paper. The charged particle equilibrium inside the calorimeter elements will be studied. Then we will focus on parametric studies of the various components of the calorimeter. The influence of source type will be also took into account. Moreover the influence of the material used for the sample will be described.

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Section: Introductionmentioning

confidence: 93%

Monte Carlo Simulation Study of a Differential Calorimeter Measuring the Nuclear Heating in Material Testing Reactors

Amharrak

Reynard-Carette

Lyoussi

et al. 2016

EPJ Web of Conferences

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“…The main experiments during which TLD measurements have been performed are described in detail in references [19,[26][27][28][29][30][31][32][33][34][35][36][37] and briefly summarized below: -Photon heating measurements were carried out in stainless steel and UO 2 fuel rods of the FBBF 4 fast neutron reactor, using CaF 2 and LiF TLDs encapsulated in stainless steel and lead pillboxes [27]. The measured doses corrected for the fuel background activity are quite consistent between the different types of TLDs.…”

Section: Research Reactorsmentioning

confidence: 99%

State of the art on nuclear heating measurement methods and expected improvements in zero power research reactors

Guillou

Gruel

Destouches

et al. 2017

EPJ Nuclear Sci. Technol.

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Abstract. The paper focuses on the recent methodological advances suitable for nuclear heating measurements in zero power research reactors. This bibliographical work is part of an experimental approach currently in progress at CEA Cadarache, aiming at optimizing photon heating measurements in low-power research reactors. It provides an overview of the application fields of the most widely used detectors, namely thermoluminescent dosimeters (TLDs) and optically stimulated luminescent dosimeters. Starting from the methodology currently implemented at CEA, the expected improvements relate to the experimental determination of the neutron component, which is a key point conditioning the accuracy of photon heating measurements in mixed n-g field. A recently developed methodology based on the use of 7 Li and 6 Li-enriched TLDs, precalibrated both in photon and neutron fields, is a promising approach to deconvolute the two components of nuclear heating. We also investigate the different methods of optical fiber dosimetry, with a view to assess the feasibility of online photon heating measurements, whose primary benefit is to overcome constraints related to the withdrawal of dosimeters from the reactor immediately after irradiation. Moreover, a fibered setup could allow measuring the instantaneous dose rate during irradiation, as well as the delayed photon dose after reactor shutdown. Some insights from potential further developments are given. Obviously, any improvement of the technique has to lead to a measurement uncertainty at least equal to that of the currently used methodology (∼5% at 1s).

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“…To meet these constraints, four types of luminescent dosimeters were employed (the reader will find information on the principle of the TLDs and OSLDs operation in [7]). They offered various advantages such as very small dimensions, low fading, reusability (after annealing) and a linear response in the range of expected doses for a 10-mn AMMON irradiation (range from about 100 mGy to about 1.5 Gy).…”

Section: Description Of Nuclear-heating Measurements In Ammonmentioning

confidence: 99%

Experimental validation of photon-heating calculation for the Jules Horowitz Reactor

Lemaire

Vaglio–Gaudard

Lyoussi

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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State of the art on nuclear heating in a mixed (n/γ) field in research reactors

Cited by 9 publications

References 36 publications

Monte Carlo Simulation Study of a Differential Calorimeter Measuring the Nuclear Heating in Material Testing Reactors

Monte Carlo Simulation Study of a Differential Calorimeter Measuring the Nuclear Heating in Material Testing Reactors

State of the art on nuclear heating measurement methods and expected improvements in zero power research reactors

Experimental validation of photon-heating calculation for the Jules Horowitz Reactor

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