A Performance Study of a New Personal Neutron Dosimetry System at SNRC

Gal, Amit; Even-Hen, Ofir; Awad, Oshrit; Levi, Yaniv; Buchbinder, Lotem; Datz, Hann

doi:10.1093/rpd/ncaa036

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…Another advantage of our new tool is the fast neutrons measurement uncertainty expected improvement. Since some of this uncertainty contribution come from the robustness uncertainty, our tool should slightly improve the overall measurement uncertainty by eliminating the worker A vs. worker B robustness term [17].…”

Section: Resultsmentioning

confidence: 99%

“…Since late 70's [16] and until recently, SNRC fast neutron dosimetry system has been an in-house system. In 2018, a new personal neutron dosimetry system, LANDAUER Neutrak ® system, has been adopted at SNRC [17]. is system is designed to measure CR-39 detectors using a Zeiss microscope, which is coupled to a CCD camera and to a robotic arm that feeds the microscope's moving tray with plastic holders one at a time, each holder having six CR-39 detectors.…”

Section: Methodsmentioning

confidence: 99%

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Particles Detection System with CR-39 Based on Deep Learning

et al. 2022

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We present a novel method that we call FAINE, fast artificial intelligence neutron detection system. FAINE automatically classifies tracks of fast neutrons on CR-39 detectors using a deep learning model. This method was demonstrated using a LANDAUER Neutrak® fast neutron dosimetry system, which is installed in the External Dosimetry Laboratory (EDL) at Soreq Nuclear Research Center (SNRC). In modern fast neutron dosimetry systems, after the preliminary stages of etching and imaging of the CR-39 detectors, the third stage uses various types of computer vision systems combined with a manual revision to count the CR-39 tracks and then convert them to a dose in mSv units. Our method enhances these modern systems by introducing an innovative algorithm, which uses deep learning to classify all CR-39 tracks as either real neutron tracks or any other sign such as dirt, scratches, or even cleaning remainders. This new algorithm makes the third stage of manual CR-39 tracks revision superfluous and provides a completely repeatable and accurate way of measuring either neutrons flux or dose. The experimental results show a total accuracy rate of 96.7% for the true positive tracks and true negative tracks detected by our new algorithm against the current method, which uses computer vision followed by manual revision. This algorithm is now in the process of calibration for both alpha-particles detection and fast neutron spectrometry classification and is expected to be very useful in analyzing results of proton-boron11 fusion experiments. Being fully automatic, the new algorithm will enhance the quality assurance and effectiveness of external dosimetry, will lower the uncertainty for the reported dose measurements, and might also enable lowering the system’s detection threshold.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Particles Detection System with CR-39 Based on Deep Learning

et al. 2022

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“…In some cases, the shape of the etched tracks can also be used as a discrimination factor [54]. Automatic recognition systems have already been developed, for instance the system Neutrak© by Landauer [55,56], which uses a deterministic image analysis algorithm to separate neutron tracks (the object of interest in that case) from impurities / background / α-particle tracks and other heavy charged particle tracks. The first attempt of going beyond this stage by applying advanced machine learning capabilities so to automatically classify particle tracks in CR39 and differentiate between different particles and different energies has been made by Amit, Nissim et al [57].…”

Section: Jinst 18 C09012mentioning

confidence: 99%

Perspectives on research on laser driven proton-boron fusion and applications

Batani

2023

J. Inst.

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Recent experiments with high-intensity lasers have shown record production of α-particles by irradiating boron-hydrogen targets. This opened the way to completely new studies on proton-boron fusion with multiple goals: i) studies related to nuclear fusion. The proton-boron fusion reaction produces 3 α-particles and releases a large energy. It is considered an interesting alternative to deuterium-tritium fusion because it produces no neutrons, therefore no activation and radioactive wastes. ii) generation of novel laser-driven α-particle sources. Laser-driven α-particle sources are promising for their potential high brightness while remaining compact. They could be used for multidisciplinary applications, including medical ones. The COST Action CA21128 — PROBONO (PROton BOron Nuclear fusion: from energy production to medical applicatiOns) is the first international programme which aims at understanding the physics involved in laser-driven pB fusion, including the study of Equation of State of boron and boron compounds. Action's goals are to facilitate access to experimental infrastructures, maximize production of new knowledge, boost the career of young researchers by fostering opportunities for training, and finally interconnect researchers across countries building a well-organized community focused on pB research.

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“…The reader is referred to section 4.2, on the Mirion Ultra-TLD-BP and the ThermoFisher dosimeters for neutrons. Mirion and other dosimetry services, including NDS, also provide the commonly used CR-39 dosimeter with an energy response ranging from 200 keV to 6 MeV (Amit et al 2020). Other passive neutron dosimeters include the superheated drop detector, marketed by Bubble Technology Industries Inc. (BTI 2021), the albedo neutron dosimeter (Barros and Kim 2018) and the direct ion storage dosimeter (d'Errico and Bos 2004).…”

Section: Neutron Passive Dosimetrymentioning

confidence: 99%

Current status of eye-lens dosimetry in Canada

Dubeau¹,

Sun²,

Djeffal³

et al. 2022

J. Radiol. Prot.

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For occupational exposures in planned exposure situations International Commission on Radiological Protection (ICRP) publication 118 recommends an equivalent dose limit for the lens of the eye of 20 mSv yr−1 averaged over five years with no single year exceeding 50 mSv. This constitutes a reduction from the previous limit of 150 mSv yr−1. The Canadian nuclear regulator, the Canadian Nuclear Safety Commission, responded to the ICRP recommendation by initiating amendments to the Radiation Protection Regulations through a discussion paper which was published for comment by interested stakeholders in 2013. The revised equivalent dose limit of 50 mSv in a one-year dosimetry period for nuclear energy workers came into effect in January 2021. This paper presents the outcome of discussions with Canadian stakeholders in diverse fields of radiological work which focused on the implementation of the reduced occupational equivalent dose limit for the lens of the eye in their respective workplaces. These exchanges highlighted the existing practices for monitoring doses to the lens of the eye and identified current technological gaps. The exchanges also identified that, in many cases, the lens of the eye dose is anticipated to be well within the new dose limit despite some of the gaps in technology. The paper also presents the monitoring and eye-lens dose assessment solutions that are available based on different methods for eye-lens monitoring; presented together with criteria for their use.

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A Performance Study of a New Personal Neutron Dosimetry System at SNRC

Cited by 7 publications

References 8 publications

Particles Detection System with CR-39 Based on Deep Learning

Particles Detection System with CR-39 Based on Deep Learning

Perspectives on research on laser driven proton-boron fusion and applications

Current status of eye-lens dosimetry in Canada

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