改良型沸騰水型軽水炉インターナルポンプの厚肉スリーブノズルの開発(流体工学,流体機械)

概要

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The larger diameter nozzle with the thicker sleeve for the reactor internal pump (RIP) in the advanced boiling water reactor (ABWR) has been studied. The appropriate nozzle diameter was investigated through experiments and calculations, taking hydraulic performance and flow characteristics into consideration. The large diameter nozzle of 492 mm did not affect the hydraulic performance or the flow characteristics in the ABWR significantly, compared with the current nozzle (445 mm). Increase of hydraulic losses for the 492 mm nozzle was within 1 meter (2.5%) of the head from that for the 445 mm nozzle. As this variation was within the allowable level of the current RIP, the RIP with the nozzle diameter of 492 mm can be used in the next ABWR. Moreover, the flow pattern of the 492 mm nozzle in the RPV was almost the same as that of the 445 mm nozzle.
社団法人日本機械学会の論文
2003-08-25