AbstractTemperature control performance of test pieces enclosed in IFMIF capsule by using single phase gas was estimated experimentally. The key issue of this study is to obtain the definite value of dimension of test facility and flow conditions of coolant and to clarify the temperature response of test piece to the beam-off scenario. Firstly, we have examined the cooling performance of the test cell originally proposed in IFMIF-KEP and from results of this calculation performed in three dimensional system by using brand-new turbulence model for flow and thermal fields, it is concluded that the drastical change of design of test cell is needed in order to obtain the unformity of temperatrure of test piece, to improve the responsibility of temperature measurement of test piece, and to relieve the coolant flow condition, especially for inlet pressure value. Thus, we have proposed new design of test cell and test piece arragement. A mock-up experimental facility was made based on our design and preliminary experiments for temperature control were performed. As a result, we have verified the cooling performance at the case that corresponds to two beam-off senario by using mock-up faciilty.
単相ガスを用いたIFMIFカプセルに封入された試験片の温度制御性能を実験的に評価した。本研究の主要な課題は、試験施設の寸法と冷却材の流動条件の明確な値を得るとともに、ビームオフシナリオに対する試験片の温度応答を明らかにすることである。まず、IFMIF-KEPにおいて当初提案された試験セルの冷却性能を検討し、流れ場と温度場に対して最新の乱流モデルを用いて三次元系で実施した計算の結果から、試験片の温度均一性を確保し、試験片の温度測定の応答性を向上させ、冷却材の流動条件、特に入口圧力値を緩和するためには、試験セル設計の抜本的な変更が必要であると結論づけられた。そこで、試験セルと試験片配置の新設計を提案した。本設計に基づいて模擬実験装置を製作し、温度制御の予備実験を実施した。その結果、模擬装置を用いて2つのビームオフシナリオに相当する場合の冷却性能を検証することができた。