Title:
ATOMIC REACTOR WATER SUPPLY PIPING STRUCTURE AND ULTRASONIC FLOWMETER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/074780
Kind Code:
A1
Abstract:
A technology for accurately measuring with the use of an ultrasonic flowmeter
the flow rate through an atomic reactor water supply piping interposed between
an atomic reactor and an atomic reactor water supply pump. In reactor coolant
cleaning system (30), a pipe joined with reactor water supply system (10) is branched,
thereby forming auxiliary path (A) also joined with the reactor water supply
system (10). The auxiliary path (A) is furnished with restriction part (C) having
an inside diameter rendered smaller than in other parts of the auxiliary path
(A). Thus, there is provided an atomic reactor water supply piping structure.
In this structure, cavitation bubbles occur from the restriction part (C). Ultrasonic
transducer (40) is disposed between atomic reactor (1) and auxiliary path (A)
in the piping for constituting the reactor water supply system (10), thereby
carrying out measurement of the flow rate of fluid within the piping.
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Inventors:
MORI MICHITSUGU (JP)
TEZUKA KENICHI (JP)
SUZUKI TAKESHI (JP)
TEZUKA KENICHI (JP)
SUZUKI TAKESHI (JP)
Application Number:
PCT/JP2006/325796
Publication Date:
July 05, 2007
Filing Date:
December 25, 2006
Export Citation:
Assignee:
TOKYO ELECTRIC POWER CO (JP)
MORI MICHITSUGU (JP)
TEZUKA KENICHI (JP)
SUZUKI TAKESHI (JP)
MORI MICHITSUGU (JP)
TEZUKA KENICHI (JP)
SUZUKI TAKESHI (JP)
International Classes:
G21C17/032; G01F1/00; G01F1/66; G21D1/00; G21D1/02
Domestic Patent References:
| WO1999012172A1 | 1999-03-11 | |||
| WO2006132343A1 | 2006-12-14 |
Foreign References:
| JP2004354185A | 2004-12-16 | |||
| JP2005351771A | 2005-12-22 | |||
| JP2002341081A | 2002-11-27 | |||
| US6480793B1 | 2002-11-12 |
Other References:
See also references of EP 1968074A4
Attorney, Agent or Firm:
MUGISHIMA, Takashi (3rd Floor 1-5-4, Nihonbashi Kakigara-ch, Chuo-ku Tokyo, JP)
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