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Title: Method and apparatus for monitoring two-phase flow. [PWR]

Abstract

A method and apparatus for monitoring two-phase flow is provided that is particularly related to the monitoring of transient two-phase (liquid-vapor) flow rates such as may occur during a pressurized water reactor core blow-down. The present invention essentially comprises the use of flanged wire screens or similar devices, such as perforated plates, to produce certain desirable effects in the flow regime for monitoring purposes. One desirable effect is a measurable and reproducible pressure drop across the screen. The pressure drop can be characterized for various known flow rates and then used to monitor nonhomogeneous flow regimes. Another useful effect of the use of screens or plates in nonhomogeneous flow is that such apparatus tends to create a uniformly dispersed flow regime in the immediate downstream vicinity. This is a desirable effect because it usually increases the accuracy of flow rate measurements determined by conventional methods.

Inventors:
;
Issue Date:
OSTI Identifier:
7328727
Assignee:
Energy Research and Development Administration
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 47 OTHER INSTRUMENTATION; BLOWDOWN; FLOWMETERS; DESIGN; PWR TYPE REACTORS; TWO-PHASE FLOW; LOSS OF COOLANT; MONITORING; ACCIDENTS; FLUID FLOW; MEASURING INSTRUMENTS; REACTOR ACCIDENTS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 220900* - Nuclear Reactor Technology- Reactor Safety; 220200 - Nuclear Reactor Technology- Components & Accessories; 440300 - Miscellaneous Instruments- (-1989)

Citation Formats

Sheppard, J D, and Tong, L S. Method and apparatus for monitoring two-phase flow. [PWR]. United States: N. p., 1975. Web.
Sheppard, J D, & Tong, L S. Method and apparatus for monitoring two-phase flow. [PWR]. United States.
Sheppard, J D, and Tong, L S. Fri . "Method and apparatus for monitoring two-phase flow. [PWR]". United States.
@article{osti_7328727,
title = {Method and apparatus for monitoring two-phase flow. [PWR]},
author = {Sheppard, J D and Tong, L S},
abstractNote = {A method and apparatus for monitoring two-phase flow is provided that is particularly related to the monitoring of transient two-phase (liquid-vapor) flow rates such as may occur during a pressurized water reactor core blow-down. The present invention essentially comprises the use of flanged wire screens or similar devices, such as perforated plates, to produce certain desirable effects in the flow regime for monitoring purposes. One desirable effect is a measurable and reproducible pressure drop across the screen. The pressure drop can be characterized for various known flow rates and then used to monitor nonhomogeneous flow regimes. Another useful effect of the use of screens or plates in nonhomogeneous flow is that such apparatus tends to create a uniformly dispersed flow regime in the immediate downstream vicinity. This is a desirable effect because it usually increases the accuracy of flow rate measurements determined by conventional methods.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {12}
}