Community Research and Development Information Service - CORDIS

Abstract

In nuclear fuel reprocessing, the mechanical design of vessels takes on various shapes and dimensions in order to conform to safety design criteria. Many of these vessels have a very high strategic importance and so accountability has to be supported with volume measurement techniques where the uncertainty in measurement has to very small. The most common technique applied for volume measurement in both large and small tanks is the bubbler probe. Throughout the operation of the plant the physical and chemical characteristics of the solution can vary, leading to such problems as possible plugging of bubbler probes, with consequences for process control and safeguards. Work has been conducted at the JRC-Ispra TAME Laboratory with the scope of examining the physical variables affecting the design choice of bubbler probe techniques for liquid level measurement.
Application of PC computers for control and data acquisition and highly sensitive electromanometers with resolutions equal to 0.02 mm hydrostatic pressure have been used to evaluate the empirical relations between bubble and liquid height.
Results are reported on the effects of tube size simulating the plugging phenomena all under slow and fast bubbling air purge rates. A fast track portable pressure measurement system is utilised to monitor the bubble growth and recognition patterns to determine the onset of plugging. .

Additional information

Authors: HUNT B A ET AL, JRC Ispra (IT);VAN DER EECKEN D ET AL, CEC Bruxelles (BE);FRANSSEN F ET AL, IAEA, Vienna (AT)
Bibliographic Reference: Paper presented: 37th Annual Meeting, Institute of Nuclear Materials Management, Naples (US)
Availability: Available from (1) as Paper EN 40021 ORA
Record Number: 199611052 / Last updated on: 1996-09-30
Category: PUBLICATION
Original language: en
Available languages: en