Characterization and Localization of Partial-Discharge-Induced Pulses in Fission Chambers Designed for Sodium-Cooled Fast Reactors

Galli, G; Hamrita, H.; Jammes, C.; Kirkpatrick, Mike; Odic, Emmanuel; Dessante, Philippe; Molinié, P.; Cantonnet, B.; Nappe, J.-C.

doi:10.1109/tns.2018.2861566

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…The current and possible future construction of the ITER and DEMO fusion reactors, as well as the construction of sodiumcooled IV th generation nuclear reactors will necessitate the use of high temperature fission chambers [1] (HTFC) to detect neutrons in the high temperature zones of these installations [2][3][4][5][6][7][8][9][10]. Multiple uses are envisaged such as reactor power control and fuel cladding failure detection [11][12].To operate in-core, the HTFC will have to operate under high irradiation, up to 10 10 n/cm².s and to withstand the high operating temperatures, up to 650°C, of the sodium-cooled fast reactors and, up to 1000°C, of the fusion reactors.…”

Section: Introductionmentioning

confidence: 99%

“…After years of study [7][8][9][10], it is now known that an electrical signal, here referred to as a partial discharge or PD, more or less similar to the signal resulting from neutron interactions, is generated in fission chambers at temperatures above 400 °C. This unwanted signal poses challenges, especially during reactor start-up when the PD signal count may be on the same order of magnitude as the neutron signal count [10].…”

Section: Introductionmentioning

confidence: 99%

“…Previous work on fission chambers [9] has focused attention on the possible implication of a solid insulator in the process leading to the creation of the unknown signal (PD). The present study considers the simplified case of a sphere-sphere geometry without any solid insulator in order to validate assumptions made in that previous work about PD activity at high temperature and pressure, and to generally enlarge the scope of the results to other fields of research.…”

Section: Introductionmentioning

confidence: 99%

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Paschen’s Law in Extreme Pressure and Temperature Conditions

Galli

Hamrita

Jammes

et al. 2019

IEEE Trans. Plasma Sci.

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Paschen's law gives the inception voltage for an electrical discharge as a function of the product of gas pressure and the gap distance between two infinite planar electrodes. It is known that deviations from Paschen's law occur when temperature is increased. Historically two theoretical corrections, the Peek and Dumbar corrections, are proposed to predict the deviation from Paschen's law by increasing temperature. To carry out an experimental investigation on the deviation from Paschen's law by increasing temperature a customized system was designed which can operate at temperatures up to 400°C and at pressure up to 1MPa, calculated at room temperature; with an inter-electrode distance between 100µm and 6.6mm and with an error on the inter-electrode distance measurement of 20µm. In this article, firstly, the results from the experimental investigation on the deviation from Paschen's law at temperature up to 400°C are presented. The results are then compared with theoretical corrections, and finally a theory to explain the results is proposed and discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Paschen’s Law in Extreme Pressure and Temperature Conditions

Galli

Hamrita

Jammes

et al. 2019

IEEE Trans. Plasma Sci.

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“…In such cases, it is worth knowing that the source of the registered radiation is PD. Some articles describe PD that occur in fission chambers [17]. This article and the studies presented in it fill this gap.…”

Section: Introductionmentioning

confidence: 99%

Using a Scintillation Detector to Detect Partial Discharges

Nagi

Kozioł

Kunicki

et al. 2019

Sensors

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This article presents the possibility of using a scintillation detector to detect partial discharges (PD) and presents the results of multi-variant studies of high-energy ionizing generated by PD in air. Based on the achieved results, it was stated that despite a high sensitivity of the applied detector, the accompanying electromagnetic radiation from the visible light, UV, and high-energy ionizing radiation can be recorded by both spectroscopes and a system commonly used to detect radiation. It is also important that the scintillation detector identifies a specific location where dangerous electrical discharges and where the E-M radiation energy that accompanies PD are generated. This provides a quick and non-invasive way to detect damage in insulation at an early stage when it is not visible from the outside. In places where different radiation detectors are often used due to safety regulations, such as power plants or nuclear laboratories, it is also possible to use a scintillation detector to identify that the recorded radiation comes from damaged insulation and is not the result of a failure.

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Design and irradiation test of an innovative optical ionization chamber technology

Lamotte

Izarra

Jammes

2020

Nuclear Instruments and Methods in Physics Research Section A:

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To provide future dependable neutron ux monitoring instrumentation for sodiumcooled fast reactors (SFR) of Generation-IV, French Alternative Energies and Atomic Energy Commission (CEA) is investigating the applicability of an innovative technology based on the optical signal produced within any type of ionization chambers such as ssion chambers for instance. A mock-up of that innovative neutron detector was tested on a cold-neutron beamline at the ORPHEE nuclear facility. Experimental results regarding recovery time and detection eciency showed promising possibilities for neutron instrumentation.

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Characterization and Localization of Partial-Discharge-Induced Pulses in Fission Chambers Designed for Sodium-Cooled Fast Reactors

Cited by 4 publications

References 19 publications

Paschen’s Law in Extreme Pressure and Temperature Conditions

Paschen’s Law in Extreme Pressure and Temperature Conditions

Using a Scintillation Detector to Detect Partial Discharges

Design and irradiation test of an innovative optical ionization chamber technology

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