1次主冷却系配管体積試験用ISI装置の設計製作

Design study of ISI system for MONJU primary cooling piping

秋山 貴由輝; 横山 邦彦; 荒 邦章 

not registered; not registered; not registered

もんじゅの1次主冷却系配管体積試験用ISI装置の開発を行った。方法としては,実験及び要素試験等により,パラメータを振って比較検討を行った。主な結果は以下の通り。(1)探触子の振動子径,周波数及び屈折角の最適化を図った。(2)制御の面から検査機の駆動輪を3輪配置にし,蛇行,上下及び左右傾きを各々補正する方式とした。(3)作業員が2人で運搬できるように,検査機の軽量化を図り,重量は38kgまで軽量化し,かつ,2分割構造とした。(4)着脱方式,駆動源等の検討を行い,保温を3分割にし,エアーシリンダーで着脱する方式とした。以上の結果より,得られた成果を以下に示す。(1)80度Cでの体積試験が可能となり,また,接触媒質の供給・回収装置が不要となった。(2)もんじゅで実作業を実施するにあたり,作業内容の省力化,装置の簡略化が可能となり,さらに作業員の被ばく低減が大きく期待できる。

We have been developing a inspection tool in order to apply for ISl of 32B sized elbow piping on MONJU primary cooling circuit. Experiments and examination were carried out on design work to decide the design parameters. We obtained the results as follows, (1)The design parameters of un ultrasonic probe, such as the ultrasonic element's diameter, frequency and refraction angle, were chosen as the most suitable for fraw detection. (2)It was confirmed that the most stable scanning of the scanner was achieved by the control of 3 driving wheels. (3)The scanner could be carried by 2 persons, it's weight was 38kg. (4)The handling mechanism for thermal insulator consist's of three divided piecies and lt's driving source is pneumatic. The conclusions of this study were as follows, (1)An equipments of the volumetric examination for large scale elbow piping was designed, and it could be use at 80C without supplying and collecting apparatus for couplant. (2)This system must be contribute the reduction of human radiation dose.