• 제목/요약/키워드: nuclear division

검색결과 2,147건 처리시간 0.036초

Assaying of SNM using Simultaneous Detection of Fission Neutrons and Gammas by Employing a Novel Phoswich Detector

  • Sonu;Mohit Tyagi;A. Kelkar;A. Sahu;M. Sonawane;P.S. Sarkar;A. Pandey;D.B. Sathe;G.D. Patra;T. Vincent;S.G. Singh;R.B. Bhatt
    • Nuclear Engineering and Technology
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    • 제55권7호
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    • pp.2662-2669
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    • 2023

  • For the precise measurements of special nuclear materials (SNM) including Pu and Am isotopes, we have used phoswich detector combination of two single crystal scintillators of Gd3Ga3Al2O12:Ce and CsI:Tl. High detection efficiency and sensitivity along with high figure of merit for the discrimination of these phoswich detectors ensures the detection and discrimination of thermal neutrons and gammas from spontaneous fission of Pu and other isotopes in presence of high gamma background. Using this detector, the low energy gammas, which is stopped completely in 1mm thick disc of GGAG, can be also discriminated from high energies gamma and shows linearity in wide range of sample quantities. By changing only the appropriate shielding, the similar setup was used for thermal neutron detection and shows a very good linearity over wide range. The quantity of a test sample was also calculated accurately by using the measured calibrated plot.

  • https://doi.org/10.1016/j.net.2023.03.028 인용 PDF

Monte Carlo Analysis of the Accelerator-Driven System at Kyoto University Research Reactor Institute

  • Kim, Wonkyeong;Lee, Hyun Chul;Pyeon, Cheol Ho;Shin, Ho Cheol;Lee, Deokjung
    • Nuclear Engineering and Technology
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    • 제48권2호
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    • pp.304-317
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    • 2016

  • An accelerator-driven system consists of a subcritical reactor and a controllable external neutron source. The reactor in an accelerator-driven system can sustain fission reactions in a subcritical state using an external neutron source, which is an intrinsic safety feature of the system. The system can provide efficient transmutations of nuclear wastes such as minor actinides and long-lived fission products and generate electricity. Recently at Kyoto University Research Reactor Institute (KURRI; Kyoto, Japan), a series of reactor physics experiments was conducted with the Kyoto University Critical Assembly and a Cockcrofte-Walton type accelerator, which generates the external neutron source by deuteriu-metritium reactions. In this paper, neutronic analyses of a series of experiments have been re-estimated by using the latest Monte Carlo code and nuclear data libraries. This feasibility study is presented through the comparison of Monte Carlo simulation results with measurements.

  • https://doi.org/10.1016/j.net.2015.12.001 인용 PDF KSCI