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  • Mass/volume measurements: The demonstration and application of portable and fixed monitoring units for tank calibrations and long term monitoring


Safeguarding nuclear facilities where the material is processed in tanks presents a challenge due to the bulk quantities and concentrations of the strategic material handled on a routine basis. A volume long term monitoring device (VLTM) has been designed which is suitable for the unattended monitoring of solutions in tanks. The unit can be either portable or fixed for tank calibrations and/or long term unattended monitoring. It comprises a data acquisition unit and one or more pressure measurement instruments. These units have been designed using up-to-date hardware and software technology for ease of use, for both installation in a facility and evaluation of the gathered data. The VLTM can run for a period of several weeks, is tamper proof and located in an external frame housing which is locked. The measurement device has two systems of authentication. Each pressure sensor is equipped with a passive transmitter assuring authentication. After the parameter settings the personal computer is disconnected and the VLTM is locked in such a way that it is impossible to switch it off, stop the acquisition or to change any of the parameter settings. Parameter settings include frequency of data logging, averaging, standard deviation and alarm threshold settings.

Additional information

Authors: HUNT B A, JRC Ispra (IT);LANDAT D, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Symposium on International Safeguards, Vienna (AT), 13-16 October 1997
Availability: Available from (1) as Paper EN 40989 ORA
Record Number: 199810201 / Last updated on: 1998-02-12
Original language: en
Available languages: en