低除染ペレット燃料製造施設構成の合理化に関する調査 別冊ー低除染燃料製造システムの量産化に関する評価手法の調査ー

Investigation into rationalization of low DF pellet fuel fabrication plant configuration Additional Vol. - Study on characteristics evaluation of low DF fuel fabrication systems -

前川 一彦*; 吉村 忠宏*; 星野 康史*; 宗片 英樹*; 田巻 喜久*

Maekawa, Kazuhiko*; Yoshimura, Tadahiro*; Hoshino, Yasushi*; Munekata, Hideki*; Tamaki, Yoshihisa*

FBRサイクル実用化戦略調査研究の一環として、燃料製造システム間でプラント稼働率と廃棄物発生量の計算を行う特性評価シミュレーターを開発し、システム間の特性比較を実施した。今回はキャンペーン運転やバッチ処理装置に対応するプログラム改良を行ない、計算の精度を上げた。ペレットシステムとゲル化振動充填システムの比較を行なったところ、プラント稼働率及び環境負荷低減性の指標においてペレットシステムに有利な結果となった。

In feasibility studies on commercialized FBR cycle system, a comprehensive system investigation and properties evaluation for candidate FBR cycle systems has been implemented through view point of safety, economics, environmental burden reduction, non-proliferation resistively, etc. As part of these studies, an investigation into rationalization of low decontamination pellet fuel fabrication plant configuration, and a study on characteristics evaluation techniques which focused on plant operating rate and waste generation was conducted. Until last fiscal year, a characteristics evaluation simulator which calculates plant operating rate and waste generation by input failure frequency data and periodic replacement data of every equipment or component was developed, and characteristics comparison between multiple fuel fabrication systems was done by applying it. Character of each fuel fabrication system, concerning system stability represented by waste generation, was shown and challenges in characteristics evaluation were made clear. In this fiscal year, programs of the simulator were modified to reflect plant designs correctly by describing campaign operation and batch treatment in the plant in order to make more quantitative calculation possible. On the other hand, in response to the challenges in the characteristics evaluation of last fiscal year, the system properties data based on a certain standard were acquired in conceptual design study and database were created with view of inter-system comparison. As the results of comparison between pellet system and sphere-pac system using simulator, it was suggested that system stability of pellet system is higher than sphere-pac system, and pellet system is also better in environmental burden reduction, because waste generation of sphere-pac system is apparently larger than pellet system.