VOID FRACTION MEASUREMENT IN TWO-PHASE FLOW WITH X-RAYS
The exact knowledge of the void fraction in two-phase flow systems with water and vapour is of great importance for water reactors. A measurement method not disturbing the fluid flow is the absorption technique of gamma or X-rays. In an earlier report both methods have been compared and in the following the most favourable and less dangerous method with X-rays have been tested for the present case of small absorption lengths (about 16 mm). In collaboration with the "Lehrstuhl fuer elektronische Schaltungen" of the Ruhruniversitaet, Bochum (FRG), a rapid measurement device has been developed using ionization chambers. At present steady state fluid flows in vertical tubes with homogeneous distribution of the two phases water - vapour are tested at pressures in the range from 70 to 150 bars and rather good agreements with calculated values are found. An extension to the study of heterogeneous distribution of the two phases using multi-beam techniques is planned.
Bibliographic Reference: EUR 9487 EN (1984) MF, 39 P., BFR 120, BLOW-UP COPY BFR 195, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123023400 / Last updated on: 1987-01-01
Available languages: en