Comparison between passive reactor cavity cooling systems based on atmospheric radiation and atmospheric natural circulation

Kuniyoshi Takamatsu, Tatsuya Matsumoto, Wei Liu, Koji Morita

研究成果: Contribution to journalArticle査読

抄録

In this study, reactor cavity cooling systems (RCCSs) based on atmospheric radiation and atmospheric natural circulation were compared. The RCCS based on atmospheric radiation is only affected by temperature changes in the atmosphere. A typhoon or tornado has no effect because this RCCS has no air ducts to generate a chimney effect. Thus, it can be designed to maintain heat transfer surfaces at temperatures below 100 °C to prevent low-temperature ignition of combustibles and wind-driven fire (i.e., there is a large safety margin for temperature). In contrast, an RCCS based on atmospheric natural circulation is affected by temperature, wind speed, and humidity changes in the atmosphere. It is also affected by the decrease in the heat transfer coefficient from turbulent to laminar flow. It is designed to maintain heat transfer surfaces at over 250–300 °C to drive the chimney effect, which can lead to low-temperature ignition of combustibles and wind-driven fire. Based on the above comparison, a new RCCS based on atmospheric radiation is suggested because of the excellent degree of passive safety features, and the amount of heat removal by heat transfer surfaces can be controlled. This RCCS can be adopted by all types of small modular reactors, including high-temperature gas-cooled reactors and very-high-temperature reactors.

本文言語英語
論文番号107867
ジャーナルAnnals of Nuclear Energy
151
DOI
出版ステータス出版済み - 2 2021

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering

フィンガープリント 「Comparison between passive reactor cavity cooling systems based on atmospheric radiation and atmospheric natural circulation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル