Comparison of the Thermal Response of Two Calorimetric Cells Dedicated to Nuclear Heating Measurements During Calibration

Brun, J.; Reynard-Carette, C.; Lyoussi, A.; Vita, C. De; Carette, M.; Muraglia, M.; Fourmentel, D.; Guimbal, P.; Villard, J-F.

doi:10.1109/tns.2014.2306839

Cited by 15 publications

(12 citation statements)

References 12 publications

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“…It is the same kind of non-adiabatic differential calorimeter as the CALMOS device patented by the CEA [26]. The calorimeter design studied was specially adapted in order to carry out in-pile experiments in the periphery of the OSIRIS reactor in France [6,27] for a nuclear heating range of up to 2 W.g -1 . Consequently, it is more sensitive than the previous device, and thus reaches higher temperatures for the same nuclear heating level.…”

Section: B Specifics Of the Studied Differential Calorimetermentioning

confidence: 99%

“…As this kind of calorimeter contains two heating elements, its preliminary out-of-pile calibration is based on the analysis of the successive steady thermal states reached by each calorimetric cell by simulating nuclear heating. These calibration curves are obtained thanks to an experimental setup imposing external boundary conditions around the calorimeter (a coolant fluid flow with controlled temperature and velocity conditions) and internal conditions (heat source intensity simulating the nuclear energy deposition rate by using the Joule effect) [6,23,27].…”

Section: B Specifics Of the Studied Differential Calorimetermentioning

confidence: 99%

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Responses of Single-Cell and Differential Calorimeters: from Out-of-Pile Calibration to Irradiation Campaigns.

Brun

Tarchalski

Reynard-Carette

et al. 2016

IEEE Trans. Nucl. Sci.

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Abstract-The nuclear radiation energy deposition rate (unit usually employed: W.g -1 ) is a key parameter for the thermal design of experiments on materials and nuclear fuel carried out in experimental channels of irradiation reactors, such as the French reactor in Saclay called OSIRIS or the Polish reactor named MARIA. In particular the quantification of nuclear heating allows the prediction of heat and thermal conditions induced in irradiated devices and/or structural materials. Various sensors are used to quantify this parameter, in particular radiometric calorimeters, also known as in-pile calorimeters. Two main kinds of in-pile calorimeter exist possessing two geometries and two measurement principles: the single-cell calorimeter and the differential calorimeter. The present work focuses on specific examples of these calorimeter types, from the step of their out-of-pile calibration (transient and steady experiments respectively) to the comparison between numerical and experimental results obtained from two irradiation campaigns (French and Polish reactors). The main aim of this paper is to propose a steady numerical approach to estimate the single-cell calorimeter response under irradiation conditions.

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Section: B Specifics Of the Studied Differential Calorimetermentioning

confidence: 99%

Section: B Specifics Of the Studied Differential Calorimetermentioning

confidence: 99%

Responses of Single-Cell and Differential Calorimeters: from Out-of-Pile Calibration to Irradiation Campaigns.

Brun

Tarchalski

Reynard-Carette

et al. 2016

IEEE Trans. Nucl. Sci.

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“…This new latter value, not reached in existing European MTRs, implies improvements and innovations of dedicated sensors used to direct measurements such as in-pile calorimeters. Nowadays, two distinct sensors are used for the nuclear absorbed dose rate measurement in MTRs [1][2][3][4][5]: differential calorimeters and single-cell calorimeters including gamma thermometers. In these two cases, the nuclear absorbed dose rate is quantified inside a dedicated reactor channel thanks to temperature measurements (absolute or differential temperatures) and the use of calibration curves achieved preliminary, under laboratory conditions (out-of-reactor) from steady thermal states when heating elements are integrated inside the calorimeter or from non-stationary thermal states for a single-cell calorimeter without heater.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, Aix-Marseille University and CEA into the framework of a joint laboratory called LIMMEX are involved in research works on instrumentation and measurement methods for online quantification of nuclear and thermal parameters in Material Testing Reactors (MTRs). In particular, studies focus on calorimeters (single-cell and differential calorimeters) used for the quantification of the nuclear absorbed dose rate [2][3][4][5][6][7]. Research works coupling experiments (under laboratory and real conditions) with thermal numerical works (1D calculations and 3D simulations) allow the design, the characterization, the calibration, the qualification and the miniaturization of various calorimeters owning different metrological advantages (sensitivity, range, size...).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Responses of New Reduced-Size Calorimetric Cells Made of Different Structure Materials for High Energy Deposition

et al. 2020

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This paper concerns experimental and numerical works on a new differential calorimeter called CALORRE and validated recently under irradiation conditions in MARIA reactor at low nuclear absorbed dose rate level. Works focus on a specific configuration of CALORRE which was designed especially for the measurement of high nuclear energy deposition rates inside Material Testing Reactors. Due to the high level, a new calibration system was fabricated in order to determine the response of the new configuration under laboratory conditions for a very wide range of electrical power never applied in the literature. The response of the new configuration can be considered linear for this very wide range of electrical power. An analytical calculation shows the contribution of each heat transfer in specific zones. 3D thermal simulations performed by means of COMSOL Multiphysics under irradiation conditions give the predictions of the calorimeter behavior under real conditions (up to 20W.g−1).

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“…In this context, the IN-CORE program [1][2][3], run jointly by the CEA and Aix-Marseille University since 2009, was created. Currently, two kinds of in-pile sensors are used to measure nuclear heating rate inside Material Testing Reactors (MTRs): the single-cell calorimeter [4,5], and the differential calorimeter [5][6][7][8][9][10]. Thus, for each kind of sensor, the IN-CORE program is involved in a scientific axis focusing on the enhancement of sensor design, their out-pile calibration means, methods (protocols) and their in-pile quantification methods, and interpretation analysis.…”

Section: Introductionmentioning

confidence: 99%

Calibration of a Single-Cell Calorimeter in a New Transient-state Test Bench

et al. 2020

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The nuclear radiation energy deposition rate is a key value for the thermal design of experiments, on materials and nuclear fuels, carried out in experimental channels of nuclear research reactors. Studies are led for two kinds of sensor currently dedicated to quantifying this value and corresponding to calorimeter. Development of new sensors but also improvement of their calibration and their associated interpretation methods are necessary. These aims are possible by many ways such as numerical simulations of sensor, characterizations under laboratory conditions and experimental campaign under irradiation conditions. The calibration step under non-irradiation conditions represents a crucial phase. This phase requires the development of specific benches. The present paper focuses on a new thermal-transient bench and its use to perform calibration of a polish single-cell calorimeter. The new bench is detailed. First studies of the influence of external conditions (temperature, velocity) on the calorimeter sensitivity are presented and discussed.

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Comparison of the Thermal Response of Two Calorimetric Cells Dedicated to Nuclear Heating Measurements During Calibration

Cited by 15 publications

References 12 publications

Responses of Single-Cell and Differential Calorimeters: from Out-of-Pile Calibration to Irradiation Campaigns.

Responses of Single-Cell and Differential Calorimeters: from Out-of-Pile Calibration to Irradiation Campaigns.

Comparison of the Responses of New Reduced-Size Calorimetric Cells Made of Different Structure Materials for High Energy Deposition

Calibration of a Single-Cell Calorimeter in a New Transient-state Test Bench

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