原子炉建屋の三次元モデル化手法の標準化への取り組み

Standardization of a three-dimensional modeling method for a reactor building

西田 明美  ; 崔 炳賢  ; 塩見 忠彦; Li, Y. 

Nishida, Akemi; Choi, B.; Shiomi, Tadahiko; Li, Y.

計算工学及び計算機技術等の発展により、近年は構造解析等において実形状に基づく三次元モデルが作成され、応力解析や応答解析等に活用されている。原子炉建屋においても、三次元モデルは耐震性評価の裏付け等に活用されつつある。しかしながら、三次元モデルの品質は解析者に依存し、原子炉建屋のように実大実験が困難な規模の構造に対しては、得られた結果の妥当性確認が課題となっている。このような状況を踏まえ、原子力機構では原子炉建屋の三次元モデルの構築手法の標準化への取り組みを開始した。本発表では、その概要について述べる。

With the development of computational methods in engineering and advanced computer technologies, three-dimensional modeling based on actual shapes are possible in structural analysis; in recent years, this method has been utilized in various applications, such as stress and response analyses. Three-dimensional models are also being used for reactor buildings to support earthquake resistance evaluations, among others. However, the quality of the three-dimensional model depends on the analyst, and confirming the validity of the obtained result is a challenge because of the difficulty of performing full scale experiments for the reactor building. Based on these situations, JAEA has started the R&D to standardize the method of constructing the three-dimensional model of the reactor building. The outline of this standardization approach is shown in this presentation.