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Project plan of HTTR heat application test facility; Safety design and Safety analysis

HTTR-熱利用試験施設のプロジェクト計画; 安全設計及び安全解析

青木 健  ; 長谷川 武史 ; 倉林 薫; 野本 恭信 ; 清水 厚志 ; 佐藤 博之  ; 坂場 成昭 

Aoki, Takeshi; Hasegawa, Takeshi; Kurahayashi, Kaoru; Nomoto, Yasunobu; Shimizu, Atsushi; Sato, Hiroyuki; Sakaba, Nariaki

原子力機構はHTTR(高温工学試験研究炉)及び水素製造施設を接続するHTTR-熱利用試験を計画している。本研究は、HTTR-熱利用試験施設の安全設計及び安全解析の成果を報告する。安全設計では、期待する安全機能に基づき構築物・系統及び機器の安全重要度分類を定めた。予備安全解析では、RELAP5コードを用いた熱流動解析を行った。予備安全解析は、蒸気発生器の伝熱管破損を除くHTTR-熱利用試験で新たに想定される事象が既設のHTTRの許認可ベース事象に包絡されること、並びに、新たな許認可ベース事象の候補は安全解析の判断基準を満足することを明らかにした。

Japan Atomic Energy Agency (JAEA) is planning to perform a test named HTTR heat application test coupling HTTR (High temperature engineering test reactor) and a hydrogen production plant. The present study reports results of the safety design and safety analysis for HTTR heat application test facility. As a safety design, safety classification of structures, systems, and components was defined in the test facility based on their safety functions. As a preliminary safety analysis, a thermal-hydraulic analysis was performed with RELAP5 code. The safety analysis revealed that newly identified events for HTTR heat application test facility except for the rupture of heat transfer tube of steam generator was enveloped by the licensing basis events in conventional HTTR. The preliminary analysis proved that the safety criteria is satisfied in the candidate of licensing basis event.

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