水素挙動統合解析システム構築に向けた取組み

Development of hydrogen behavior simulation system for safety management

寺田 敦彦  ; 日野 竜太郎

Terada, Atsuhiko; Hino, Ryutaro

原子力機構では、発生・漏洩した水素の挙動を拡散, 燃焼, 爆発による影響評価まで統合的に解析するシステムの構築を進めている。本報では、水素挙動統合解析システムの構築に向けて、O'Hernらが実施した大規模なヘリウムガス漏洩拡散試験の試験照合解析を行い、スケール解像型非定常乱流モデルを適用することで、実験結果の再現性を確認したので報告する。

To further improve the safety performance of the Nuclear Power Station, especially on the hydrogen safety under severe accident conditions, a simulation code system has been developed to analyze hydrogen behaviors including diffusion, combustion, explosion and structural integrity evaluation. As one of validation test of a numerical simulation system for leaked hydrogen gas behavior, we compared calculated results by some calculation methods and time histories of hydrogen gas concentration etc at sensor positions of leaking hydrogen gas in large scale container. The calculated results using SAS and LES turbulence model show good agreement with experimental results.