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Title: Basic Design Of Very Large Water Flow Calibration Facility For Nuclear Power Application
Author: Hiroshi Sato, Noriyuki Furuichi, Yoshiya Terao, Masaki Takamoto
Source: Flomeko 2005
Year Published: 2005
Abstract: A new test facility has been planned for construction at National Metrology Institute of Japan (referred to as NMIJ) for the calibration of feed water flowmeters for nuclear power plants up to a Reynolds number of 16 million. This very large Reynolds number will be achieved at a flow rate of 3.33 m3/s (12,000 m3/h) and water temperature of 70C in a 600 mm pipe. This new facility has four sets of pumps and reference flowmeters installed upstream of the test section in parallel. These flowmeters will be calibrated at 0.83 m3/s (3,000 m3/h) individually without dismounting from the loop by using a 50t weighing tank, which has been used as the primary standard for the existing flow facility. The flow range can be expanded up to 3.33 m3/s (12,000 m3/h) with all the pumps and flowmeters operating simultaneously. This paper describes the basic design and concept of the new facility, and expectations of the best measurement capabilities. In addition, an experimental plan, which will be essential for applications in nuclear power plants, is suggested.

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