R&amp;amp;D program for core instrumentation improvements devoted for French Sodium fast reactors

Jeannot, Jean-Philippe; Rodriguez, G.; Jammes, C.; Bernardin, B.; Portier, J.-L.; Jadot, F.; Maire, Shashi; Verrier, D.; Loisy, F.; Prêle, Gérard

doi:10.1109/animma.2011.6172881

Cited by 7 publications

(7 citation statements)

References 8 publications

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“…As it is reported in [22], the response time is improved by optimally placing the thermocouples in the thimble. Moreover, with new thermal instrumentation and a more important sampling rate, the strategies presented here will be suitable for the detection of a TIB in much less time than the MTDF found.…”

Section: Resultsmentioning

confidence: 72%

“…Thermocouples are situated 10 cm over each one of the assembly tops. Their constant time is 4.2 71.1 s with precision of 4 1C for a temperature of 545 1C at the core output [22]. The inherent sample time is τ ¼ 3 s and the quantization of the 8 bits A/D converter is of 0.5 1C or 0.6 1C which, along with the external noise, produce a considerably quantized signal as is shown in Fig.…”

Section: Available Data Descriptionmentioning

confidence: 98%

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Two neural network based strategies for the detection of a total instantaneous blockage of a sodium-cooled fast reactor

Martinez-Martinez¹,

Messai²,

Jeannot³

et al. 2015

Reliability Engineering & System Safety

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Section: Resultsmentioning

confidence: 72%

Section: Available Data Descriptionmentioning

confidence: 98%

Two neural network based strategies for the detection of a total instantaneous blockage of a sodium-cooled fast reactor

Martinez-Martinez¹,

Messai²,

Jeannot³

et al. 2015

Reliability Engineering & System Safety

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“…In the context of Generation IV reactors, CEA-DEN, AREVA and EDF are studying many ultrasonic applications [27,139,[162][163][164] and associated robotics means [165,166]. Some of these studies may be missing in the present short review.…”

Section: Ultrasonic Measurements Telemetry Inspection and Imagingmentioning

confidence: 95%

“…For in-vessel applications, high-temperature resistant fission chambers are needed. In the framework of the R&D program for core instrumentation improvements for the French Sodium Fast Reactor, some feedback can be found in [27] on the use of fission chambers in the sodium cooled Phenix and SPX1 reactors and resulting requirements for future neutron instrumentation systems. For the Indian Sodium Cooled Fast Reactors, an I&C system is being designed [28] with a neutron instrumentation subsystem consisting of three high temperature fission chambers at the core center and Boron-10 coated proportional counters in control plug locations for flux monitoring during initial fuel loading and first approach to criticality.…”

Section: Reactor Instrumentation Systemsmentioning

confidence: 99%

Nuclear instrumentation and measurement: a review based on the ANIMMA conferences

Giot

Vermeeren

Lyoussi

et al. 2017

EPJ Nuclear Sci. Technol.

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Abstract. The ANIMMA conferences offer a unique opportunity to discover research carried out in all fields of nuclear measurements and instrumentation with applications extending from fundamental physics to fission and fusion reactors, medical imaging, environmental protection and homeland security. After four successful editions of the Conference, it was decided to prepare a review based to a large extent but not exclusively on the papers presented during the first four editions of the conference. This review is organized according to the measurement methodologies: neutronic, photonic, thermal, acoustic and optical measurements, as well as medical imaging and specific challenges linked to data acquisition and electronic hardening. The paper describes the main challenges justifying research in these different areas, and summarizes the recent progress reported. It offers researchers and engineers a way to quickly and efficiently access knowledge in highly specialized areas.

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“…Based on this viewpoint, improvement of measurement tools' accuracy, sensitivity, frequency of measurements and reliability are required [8,6]. Ultrasonic measurement systems have been studied and developed among LIET CEA Cadarache and LMA CNRS as possible methods for liquid sodium with no transparency [5].…”

mentioning

confidence: 99%

Wave propagation simulation in the upper core of sodium-cooled fast reactors using a spectral-element method for heterogeneous media

et al. 2018

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Abstract-ASTRID project, French sodium cooled nuclear reactor of 4th generation, is under development at the moment by Alternative Energies and Atomic Energy Commission (CEA). In this project, development of monitoring techniques for a nuclear reactor during operation are identified as a measure issue for enlarging the plant safety. Use of ultrasonic measurement techniques (e.g. thermometry, visualization of internal objects) are regarded as powerful inspection tools of sodium cooled fast reactors (SFR) including ASTRID due to opacity of liquid sodium. In side of a sodium cooling circuit, heterogeneity of medium occurs because of complex flow state especially in its operation and then the effects of this heterogeneity on an acoustic propagation is not negligible. Thus, it is necessary to carry out verification experiments for developments of component technologies, while such kind of experiments using liquid sodium may be relatively large-scale experiments. This is why numerical simulation methods are essential for preceding real experiments or filling up the limited number of experimental results. Though various numerical methods have been applied for a wave propagation in liquid sodium, we still do not have a method for verifying on threedimensional heterogeneity. Moreover, in side of a reactor core being a complex acousto-elastic coupled region, it has also been difficult to simulate such problems with conventional methods. The objective of this study is to solve these 2 points by applying three-dimensional spectral element method. In this paper, our initial results on three-dimensional simulation study on heterogeneous medium (the first point) are shown. For heterogeneity of liquid sodium to be considered, four-dimensional temperature field (three spatial and one temporal dimension) calculated by computational fluid dynamics (CFD) with LargeEddy Simulation was applied instead of using conventional method (i.e. Gaussian Random field). This three-dimensional numerical experiment yields that we could verify the effects of heterogeneity of propagation medium on waves in Liquid sodium.

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R&D program for core instrumentation improvements devoted for French Sodium fast reactors

Cited by 7 publications

References 8 publications

Two neural network based strategies for the detection of a total instantaneous blockage of a sodium-cooled fast reactor

Two neural network based strategies for the detection of a total instantaneous blockage of a sodium-cooled fast reactor

Nuclear instrumentation and measurement: a review based on the ANIMMA conferences

Wave propagation simulation in the upper core of sodium-cooled fast reactors using a spectral-element method for heterogeneous media

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