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Design of the Online Gross γ Monitoring Instrument at the Exit of the Helium Purification System in HTR-PM.

Authors :
Lou, Mengqi
Zhang, Liguo
Xie, Feng
Cao, Jianzhu
Tong, Jiejuan
Liu, Weirong
Wang, Yong
Source :
Science & Technology of Nuclear Installations. 11/1/2018, p1-12. 12p.
Publication Year :
2018

Abstract

After the successful construction and operation experience of the 10 MW high-temperature gas-cooled reactor (HTR-10), a high-temperature gas-cooled pebble-bed modular (HTR-PM) demonstration plant is under construction in Shidao Bay, Rongcheng City, Shandong province, China. An online gross γ monitoring instrument has been designed and placed at the exit of the helium purification system (HPS) of HTR-PM and is used to detect the activity concentration in the primary circuit after purification. The source terms in the primary loop of HTR-PM and the helium purification process were described. The detailed configuration of the gross γ monitoring instrument was presented in detail. The Monte Carlo method was used to simulate the detection efficiency of the monitoring system. Since the actual source terms in the primary loop of HTR-PM may be different than the current design values, a sensitivity analysis of the detection efficiency was implemented based on different relative proportions of the nuclides. The accuracy and resolution of the NaI(Tl) detector were discussed as well. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16876075
Database :
Academic Search Index
Journal :
Science & Technology of Nuclear Installations
Publication Type :
Academic Journal
Accession number :
132770367
Full Text :
https://doi.org/10.1155/2018/5808352