Whats new? Calibration Hardware IAEA Acquisition software - - PowerPoint PPT Presentation

IAEA 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
• peration 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? Hardware Acquisition software Calibration

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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

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

What’s new? Hardware Acquisition software Calibration

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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

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• 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

What’s new?

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New acquisition software able to:

• Filter out noise for fast transient components
• Read air bubble frequency (air flow control)

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What’s new?

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• 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

Hardware

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Hardware

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Hardware

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Hardware

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Hardware

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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

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Acquisition Software

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Acquisition Software

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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.

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Calibration Box

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Calibration setup

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SOS calibration routine