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Title: Void detecting device

Abstract

A detector to be inserted into a flowing conductive fluid, e.g. sodium coolant in a nuclear reactor, comprising at least one exciting coil to receive an a-c signal applied thereto and two detecting coils located in the proximity of the exciting coil. The difference and/or the sum of the output signals of the detecting coils is computed to produce a flow velocity signal and/or a temperature-responsive signal for the fluid. Such flow velocity signal or temperature signal is rectified synchronously by a signal the phase of which is shifted substantially .+-. 90.degree. with respect to the flow velocity signal or temperature signal, thereby enabling the device to detect voids in the flowing fluid without adverse effects from flow velocity variations or flow disturbances occurring in the fluid.

Inventors:
 [1];  [1];  [1];  [2]
  1. (Tokyo, JP)
  2. (Musashino, JP)
Issue Date:
OSTI Identifier:
863310
Patent Number(s):
4144741
Assignee:
Doryokuro Kakunenryo Kaihatsu-Jigyodan (Tokyo, JP); Yokogawa Electric Works, Ltd. (Tokyo, JP) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
void; detecting; device; detector; inserted; flowing; conductive; fluid; sodium; coolant; nuclear; reactor; comprising; exciting; coil; receive; a-c; signal; applied; thereto; coils; located; proximity; difference; output; signals; computed; produce; flow; velocity; temperature-responsive; temperature; rectified; synchronously; phase; shifted; substantially; 90; degree; respect; enabling; detect; voids; adverse; effects; variations; disturbances; occurring; adverse effects; sodium coolant; flowing fluid; conductive fluid; signal applied; applied thereto; output signals; nuclear reactor; output signal; flow velocity; detecting device; temperature signal; coils located; a-c signal; /73/324/

Citation Formats

Nakamoto, Koichiro, Ohyama, Nobumi, Adachi, Kiyoshi, and Kuwahara, Hajime. Void detecting device. United States: N. p., 1979. Web.
Nakamoto, Koichiro, Ohyama, Nobumi, Adachi, Kiyoshi, & Kuwahara, Hajime. Void detecting device. United States.
Nakamoto, Koichiro, Ohyama, Nobumi, Adachi, Kiyoshi, and Kuwahara, Hajime. Mon . "Void detecting device". United States. https://www.osti.gov/servlets/purl/863310.
@article{osti_863310,
title = {Void detecting device},
author = {Nakamoto, Koichiro and Ohyama, Nobumi and Adachi, Kiyoshi and Kuwahara, Hajime},
abstractNote = {A detector to be inserted into a flowing conductive fluid, e.g. sodium coolant in a nuclear reactor, comprising at least one exciting coil to receive an a-c signal applied thereto and two detecting coils located in the proximity of the exciting coil. The difference and/or the sum of the output signals of the detecting coils is computed to produce a flow velocity signal and/or a temperature-responsive signal for the fluid. Such flow velocity signal or temperature signal is rectified synchronously by a signal the phase of which is shifted substantially .+-. 90.degree. with respect to the flow velocity signal or temperature signal, thereby enabling the device to detect voids in the flowing fluid without adverse effects from flow velocity variations or flow disturbances occurring in the fluid.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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