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全炉心熱流動解析コードACTの開発(Ⅳ)-上部プレナム3次元解析モジュールの導入-

Development of Whole Core Thermal-Hydraulic Analysis Program ACT (IV) - Incorporation of Three-Dimensional Upper Plenum Model-

大島 宏之; 出口 明*

Ohshima, Hiroyuki; Deguchi, Akira*

高速炉の定格運転や自然循環崩壊熱除去運転など様々な運転モードに対して、インターラッパーフローを含む炉心部全体の熱流力挙動を詳細に評価することを目的として、全炉心熱流動多次元解析コードACTの開発を進めている。本報告書は、ACTコードの開発の一環として、新たに導入した炉容器内上部プレナム3次元解析モジュールとその機能検証解析について記述したものである。

A thermal-hydraulic analysis computer program ACT is under development for the evaluation of detailed flow and temperature fields in a core region of fast breeder reactors under various operation conditions. The purpose of this program development is to contribute not only to clarifying thermal hydraulic characteristics that cannot be revealed by experiments due to measurement difficulty but also to performing the rational safety design and assessment. This report describes the incorporation of three-dimensional upper plenum model to ACT and its verification study as a part of the program development.

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