Ultrawide-range radiation detection based on dynamic identification and analysis of the response of a monolithic active pixel sensor

Xu, Shoulong; Qin, Zhiwei; Han, Y. L.; Dong, Hanfeng; Youjun, Huang; Zhao, Fang; Yang, Zhiyong; Liu, Yang; Gong, Dunwei; Ling, X U; Zou, Shuliang; Yu, Xiuwu; Yang, Hongjuan

doi:10.1364/oe.458752

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Complex accident environments have higher requirements for emergency technology [4]. The marine reactor used in this study was a pressurized water reactor (PWR) with 330 MW of thermal power.…”

Section: Introduction 1literature Reviewmentioning

confidence: 99%

Evaluation of Emergency Response Measures for the LOCA of A Marine Reactor

Yang

Zhao

et al. 2022

Sustainability

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In this study, a technical index system for nuclear accident emergency response measures was established and comprehensively evaluated by studying the impact of time, ventilation speed, and leakage speed on the radiation consequences after a loss of coolant accident (LOCA) in a marine reactor. The weight of each index was calculated by the analytic hierarchy process (AHP), and the weight of the radiation protection measure in the second-level index emergency measure was 0.625, accounting for the maximum proportion. The weights of improving radionuclide detection technology in chambers, improving detection capability, and improving the diagnosis efficiency of radiation damage in the three-level indicator emergency measures were 0.4442, 0.4384, and 0.4521, respectively, accounting for the maximum proportions. The fuzzy comprehensive evaluation method was used to quantify and comprehensively evaluate the index system of emergency measures. The quantitative evaluation result was 82.8 points, indicating that the evaluation result was adequate. Therefore, the nuclear emergency response measure based on the radiation consequences of a marine reactor LOCA is reasonable and feasible. It provides valuable measures and practical guidance for the emergency response of a marine reactor LOCA, and dramatically reduces the harm of radiation to staff and the environment.

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Section: Introduction 1literature Reviewmentioning

confidence: 99%

Evaluation of Emergency Response Measures for the LOCA of A Marine Reactor

Yang

Zhao

et al. 2022

Sustainability

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Parallel processing of radiation measurements and radiation video optimization

Xu¹,

Dong²,

Qin³

et al. 2022

Opt. Express

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In this study, we propose a parallel processing method for analyzing video-image radiation-response signals and suppressing radiation noise. We studied the linear-representation law of various image-information components on the radiation dose rate. Subsequently, the simulation images were used to examine the response-signal extract and radiation-noise suppression. The results indicate that the majority of response signals in the global image comprise forward superposition. The peak signal-to-noise ratio of the red channel was significantly improved when the noise signal-substitution algorithm and median filter were applied successively. Real-time radiation dose-rate measurements and clear images under irradiation can be obtained simultaneously.

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Research on Calculation Method of Radiation Response Eigenvalue of a Single-Chip Active Pixel Sensor

Qin

Dong

et al. 2022

Sensors

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In this paper, we present a calculation method for the radiation response eigenvalue based on a monolithic active pixel sensor. By comparing the statistical eigenvalues of different regions of a pixel array in bright and dark environments, the linear relationship between the statistical eigenvalues obtained by different algorithms and the radiation dose rate was studied. Additionally, a dose rate characterization method based on the analysis of the eigenvalues of the MAPS response signal was proposed. The experimental results show that in the dark background environment, the eigenvalues had a good linear response in the region of any gray value in the range of 10–30. In the color images, due to the difference in the background gray values in adjacent color regions, the radiation response signal in dark regions was confused with the image information in bright regions, resulting in the loss of response signal and affecting the analysis results of the radiation response signal. For the low dose rate radiation field, as the radiation response signal was too weak and there was background dark noise, it was necessary to accumulate frame images to obtain a sufficient response signal. For the intense radiation field, the number of response events in a single image was very high, and only two consecutive frames of image data needed to be accumulated to meet the statistical requirements. The binarization method had a good characterization effect for the radiation at a low dose rate, and the binarization processing and the total gray value statistics of the response data at a high dose rate could better characterize the radiation dose rate. The calibration experiment results show that the binarization processing method can meet the requirements of using a MAPS for wide-range detection.

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Ultrawide-range radiation detection based on dynamic identification and analysis of the response of a monolithic active pixel sensor

Cited by 3 publications

References 14 publications

Evaluation of Emergency Response Measures for the LOCA of A Marine Reactor

Evaluation of Emergency Response Measures for the LOCA of A Marine Reactor

Parallel processing of radiation measurements and radiation video optimization

Research on Calculation Method of Radiation Response Eigenvalue of a Single-Chip Active Pixel Sensor

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