Monte Carlo studies on the burnup measurement for the high temperature gas cooling reactor

YAN Wei-Hua; ZHANG Li-Guo; ZHANG Yan; ZHANG Zhao; XIAO Zhi-Gang

doi:10.1088/1674-1137/37/11/116201

Chinese Physics C> 2013, Vol. 37> Issue(11) : 116201 DOI: 10.1088/1674-1137/37/11/116201

Monte Carlo studies on the burnup measurement for the high temperature gas cooling reactor

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Abstract：
Online fuel pebble burnup measurement in a future high temperature gas cooling reactor is proposed for implementation through a high purity germanium (HPGe) gamma spectrometer. By using KORIGEN software and MCNP Monte Carlo simulations,the single pebble gamma radiations to be recorded in the detector are simulated under different irradiation histories. A specially developed algorithm is applied to analyze the generated spectra to reconstruct the gamma activity of the ¹³⁷Cs monitoring nuclide. It is demonstrated that by taking into account the intense interfering peaks,the ¹³⁷Cs activity in the spent pebbles can be derived with a standard deviation of 3.0%(1σ). The results support the feasibility of utilizing the HPGe spectrometry in the online determination of the pebble burnup in future modular pebble bed reactors.

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YAN Wei-Hua, ZHANG Li-Guo, ZHANG Yan, ZHANG Zhao and XIAO Zhi-Gang. Monte Carlo studies on the burnup measurement for the high temperature gas cooling reactor[J]. Chinese Physics C, 2013, 37(11): 116201. doi: 10.1088/1674-1137/37/11/116201

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Received: 2013-01-07
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Monte Carlo studies on the burnup measurement for the high temperature gas cooling reactor

Corresponding author: YAN Wei-Hua,

Corresponding author: XIAO Zhi-Gang,

Received Date: 2013-01-07

Accepted Date: 1900-01-01

Available Online: 2013-11-05

Abstract: Online fuel pebble burnup measurement in a future high temperature gas cooling reactor is proposed for implementation through a high purity germanium (HPGe) gamma spectrometer. By using KORIGEN software and MCNP Monte Carlo simulations,the single pebble gamma radiations to be recorded in the detector are simulated under different irradiation histories. A specially developed algorithm is applied to analyze the generated spectra to reconstruct the gamma activity of the ¹³⁷Cs monitoring nuclide. It is demonstrated that by taking into account the intense interfering peaks,the ¹³⁷Cs activity in the spent pebbles can be derived with a standard deviation of 3.0%(1σ). The results support the feasibility of utilizing the HPGe spectrometry in the online determination of the pebble burnup in future modular pebble bed reactors.

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Monte Carlo studies on the burnup measurement for the high temperature gas cooling reactor

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