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Materials property data are an essential part of major disciplines in many engineering fields.
To nuclear engineering, fundamental understanding of thermo-physical-chemical-mechanical properties of nuclear materials is very important.
For example, evaluation of nuclear reactor performance under normal operation or accident conditions using accurate and reliable properties data is very critical in the design and analysis of current and future reactors.
For such analyses, accurate data are necessary for materials properties under the relevant temperature, pressure and neutron irradiation conditions.
Collection and systematization of, openly available thermo-physical properties data as well as necessary new data measurements have been conducted within IAEA's Coordinated Research Project on "Establishment of a Thermo-physical Properties Database of LWRs and HWRs".
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THERSYST was originally developed for the modular reactor calculation program RSYST as a combination of a factual solid materials thermo-physical properties database and a modular program system to handle the data base contents.
Practically thermo-physical properties of solid materials are very sensitive to the manufacturing process of the materials as well as the experimental conditions of the measurements.
They depend not only on their chemical composition but also on their micro- and macrostructure resulting from the subsequent treatment: mechanical, chemical, thermal, or irradiative.
This means that thermo-physical properties data should be described by not only the measurement values but also supporting information such as material characterization and experimental techniques.
Particularly for engineering materials, the situation is more complicated because they rarely have unique compositions and their properties are drastically affected by the materials production process.
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Since 1990 IAEA has collected and systematized openly available thermo-physical properties data including newly measured data within Coordinated Research Project on "Establishment of a Thermo-physical Properties Database of LWRs and HWRs".
In the course of CRP, IAEA acquired THERSYST, a thermo-physical properties database for solid materials developed by IKE (Institut fur Kernenerge und Energiessysteme), University of Stuttgart, Germany through their courtesy.
In fact, the data base contains many valuable properties data and information, Unfortunately, however, it has been inactively utilized because of the unavailability of operating system supporting the old DOS based database.
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IAEA Designated Center for Nuclear Materials Properties Database Management