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JSFR design progress related to development of safety design criteria for generation IV sodium-cooled fast reactors, 4; Balance of plant

第4世代ナトリウム冷却高速炉の安全設計クライテリア開発に関連したJSFR設計進捗,4; BOP

近澤 佳隆; 加藤 篤志; 鍋島 邦彦; 大高 雅彦; 鵜澤 将行*; 猪狩 理紗子*; 岩崎 幹典*

Chikazawa, Yoshitaka; Kato, Atsushi; Nabeshima, Kunihiko; Otaka, Masahiko; Uzawa, Masayuki*; Ikari, Risako*; Iwasaki, Mikinori*

JSFR実証施設のBOP設備として燃料取扱設備、電源設備、空調・補機冷却系、建屋配置等を対象として、SDCを満足するため設計方針と評価についてまとめた。燃料貯蔵設備については原子炉冷却系と同様の考え方による除熱系の多重・多様化の強化、電源設備については従来の非常用電源の強化に加え代替非常用電源の追加、空調・補機冷却系:安全系機器の依存関係の明確化、多様化の観点から崩壊熱除去を海水冷却で行った場合の影響評価、建屋配置については外部事象評価の概要(地震,津波,風,雪)、分散配置方針、漏えい対策等を中心に安全設計クライテリア及びそのガイドラインの設定の背景となった評価結果を報告する。

Design study and evaluation for SDC and safety SDG on the BOP of the demonstration JSFR including fuel handling system, power supply system, component cooling water system, building arrangement are reported. For the fuel handling system, enhancement of storage cooling system has been investigated adding diversified cooling systems. For the power supply, existing emergency power supply system has been reinforced and alternative emergency power supply system is added. For the component cooling system and air conditioning, requirements and relation between safety grade components are investigated. Additionally for the component cooling system, design impact when adding decay heat removal system by sea water has been investigated. For reactor building, over view of evaluation on the external events and design policy for distributed arrangement is reported. Those design study and evaluation provides background information of SDC and SDG.

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