Core temperature distributions in HTR-10 operating at very high temperatures

doi:10.16511/j.cnki.qhdxxb.2020.22.036

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Abstract The 10 MW high temperature gas-cooled reactor test module (HTR-10) has a relatively large fuel temperature margin when operating at full power and steady state for the rated condition; thus, the coolant outlet temperature can be further increased above 700℃, which is useful for pebble-bed very high temperature gas-cooled reactors (HTGR) to operate with high coolant temperature at the core outlet. Several steady-state very high temperature operating conditions were designed for HTR-10 in this study based on a heat balance between the core heating power and the heat carried by the coolant. An improved thermal hydraulic model was used to analyze the core temperature distribution at each condition for the initial core to determine the temperature distribution characteristics, and the maximum core temperature for the nonuniform fuel distribution was discussed. For the coolant outlet temperature of 1 000℃, the predicted maximum core temperature is still below the fuel temperature limit, even when the most serious nonuniform distribution of the fuel and graphite balls occurs.

Keywords pebble-bed high temperature gas-cooled reactor (HTGR) 10 MW high temperature gas-cooled reactor test module (HTR-10) operating at very high temperatures thermal hydraulic analysis core temperature distribution

Issue Date: 19 October 2021

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	SUN Shiyan
	ZHANG Youjie
	ZHENG Yanhua
	XIA Bing

Cite this article:

SUN Shiyan,ZHANG Youjie,ZHENG Yanhua, et al. Core temperature distributions in HTR-10 operating at very high temperatures[J]. Journal of Tsinghua University(Science and Technology), 2021, 61(11): 1301-1307.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2020.22.036 OR http://jst.tsinghuajournals.com/EN/Y2021/V61/I11/1301

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