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Abstract

The mass/volume laboratory at the Joint Research Centre (JRC) Ispra is a unique large full scale facility incorporating a variety of tanks of different shapes and sizes which are typically found in nuclear facilities. Results are reported on the laboratory activity which now operates in a multi-functional mode in providing training courses; in providing back-up experimental activity for inspectors and operators on influencing factors and phenomena affecting liquid level measurements and thus accountability; in providing an experimental testing facility for portable process monitoring equipment systems developed at the JRC and currently employed in field trials in reprocessing facilities. Results are presented demonstrating the effects of slow and fast bubbling rates in the dip-tube measurement system, their interpretation, and errors, on data acquisition and analysis, on continuous versus incremental calibration conditions, and evaporation. The feasibility of using in-situ pressure measurements via the portable acquisition systems for identifying reference points, such as discontinuities within tanks, which can subsequently be applied for tank re-calibrations is also be presented. This method offers the incentives of cost savings by reducing interference and downtime of reprocessing plant operation.

Additional information

Authors: HUNT B A, JRC Ispra (IT);LANDAT D, JRC Ispra (IT);COLDWELL G, JRC Ispra (IT);YANAGISAWA H, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 38th Annual Meeting of the Institute of Nuclear Materials Management, Phoenix (US), 20-24 July 1997
Availability: Available from (1) as Paper EN 40694 ORA
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