窒素ガス注入設備確認試験

Function test of nitrogen gas injection system

佐藤 剛; 小林 孝典; 加藤 正晃; 羽鳥 雅一

Sato, Takeshi; Kobayashi, Takanori; Kato, Masaaki; Hatori, Masakazu

2次主冷却系設備等のナトリウム漏えい時に、漏えい発生区画に窒素ガスを注入することにより、ナトリウム燃焼を抑制し、早期に事故の終息を図ることを目的として、窒素ガス貯蔵タンクの設置,窒素蒸発器の増設,ナトリウム機器が設置される各区画への配管設置等の窒素ガス供給系設備の改造工事を行った。窒素ガス注入設備確認試験は、これらの改造工事を行った機器や設備について、機能・性能を確認した。

The modifications of nitrogen gas supply system were made, such as the installation of nitrogen gas storage tanks, the addition of a liquid nitrogen evaporator, and piping installation in each compartment where sodium equipments were installed, in order to suppress sodium fires and have quick closure of the accidents by injecting nitrogen gas into the compartment where a sodium leak occurred when sodium in the equipments of secondary heat transport system leaked. The functions and the performances of these modified system and equipments were confirmed in Function Test of Nitrogen Gas Injection System.