Hardware and Software Upgrade for the Solution Measurement and Monitor System at Rokkasho Reprocessing Plant R.Plenteda, A.Alessandrello, M.Frankl, W.Deringer, M.Lang, M.Cronholm, K.Baird, D.Breban, C.Creusot International Atomic Energy Agency The Solution Measurement and Monitoring System (SMMS) is one of the most important and complex safeguards systems at Rokkasho Reprocessing Plant. SMMS is applied to the chemical liquid processing part of the plant operation and involves over 90 vessels or extractors. The installed measurement instruments consist mainly of manometers and temperature sensors. The pressure readings from the manometers are used to calculate the density and the mass of the solution in each monitored tank. For the 12 most strategic tanks, IAEA owned manometers are directly connected to the Operator’s dip tubes with associated data collection system (SMMS-I type instruments) aimed at collecting and sending data to a common database. 1/2 What’s new? Calibration Hardware IAEA Acquisition software
Hardware and Software Upgrade for the Solution Measurement and Monitor System at Rokkasho Reprocessing Plant R.Plenteda, A.Alessandrello, M.Frankl, W.Deringer, M.Lang, M.Cronholm, K.Baird, D.Breban, C.Creusot International Atomic Energy Agency For the remaining tanks/equipment the operator’s instruments are used (SMMS-II). The data coming from both types of SMMSs are pre-processed and reviewed by the Solution Monitoring Software (SMS). The software basically provides a calculation of volumes, densities, flow rates in major process vessels, and includes, as well, advanced automatic features to support the inspectorate in the verification activities. The upgrade of the SMMS-I acquisition hardware and the SMMS Operating Software (SOS) at the IAEA local cabinets calls for a much more robust and reliable overall system through different levels of redundancy and new features. The software also allows the in situ calibration of manometers using an ad hoc portable calibration system. 2/2 What’s new? Calibration Hardware IAEA Acquisition software
What’s new? • Simpler design • Higher reliability • Full redundancy • In field recalibration • Low pass filter to clean bubble frequency noise at the acquisition software 1/3 IAEA
What’s new? • Uncertainties of 6.0 Pa @ 60kPa • Redundant (2 channels) • Possible to recalibrate in the field. • Very robust design and ready to operate without heat up time 2/3 IAEA
What’s new? New acquisition software able to: • Filter out noise for fast transient components • Read air bubble frequency (air flow control) 3/3 IAEA
Hardware • A tailor-made version of the CPC-2500S has been developed to accommodate the IAEA needs. The manometer has two independent channels for cross redundancy. • Two CPC-2500S are inserted in a removable cage which is connected into the standard UMS cabinet using flexible pipes. • The SMMS cabinet takes advantage of the UMS standard infrastructure components • Two twins cabinets are serving redundant components in cross relationship IAEA
Hardware IAEA
Hardware IAEA
Hardware IAEA
Hardware IAEA
Acquisition Software The SMMS Operation Software (SOS) has been developed in the IAEA to accommodate different functionalities: • Acquisition of the pressures values for the different tanks using low pass filters to reduce the noise of the high frequency transients (such as the air bubbles inside the deep tubes) • To extract the frequency of the air bubbles and therefore to monitor the air flux inside the deep tubes (auxiliary tampering information) • Two Calibrate each manometers cage in automatic using an external portable calibration box IAEA
Acquisition Software IAEA
Acquisition Software IAEA
Calibration • The manometers used in SMMS-1 need to be calibrated once a year. Even though the zero coefficients are recalculated once a week during the zeroing of all manometers, the “span” values may still vary after a year. The calibration will be done on site using a reference standard in a calibration box. • The calibration box is then connected to the calibration ports of the cage and the manifold are turned into calibration position • The SOS calibration routine will run the circuit through the full pressure cycle recording the differences between the manometers and the reference. It will then apply the new calibration coefficients into the manometers firmware. IAEA
Calibration Box IAEA
Calibration setup IAEA
SOS calibration routine IAEA
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