IAEA-TECDOC-1544 Nuclear Power Plant Design Characteristics Structure of Nuclear Power Plant Design Characteristics in the IAEAPower Reactor Information System (PRIS) March 2007 The originating Section of this publication in the IAEA was: Nuclear Power Engineering Section International Atomic Energy Agency Wagramer Strasse 5 P.O. Box 100 A-1400 Vienna, Austria NUCLEAR POWER PLANT DESIGN CHARACTERISTICS: STRUCTURE OF NUCLEAR POWER PLANT DESIGN CHARACTERISTICS IN THE IAEA POWER REACTOR INFORMATION SYSTEM (PRIS) IAEA, VIENNA, …

The nuclear power plant (NPP) design characteristics represent a fundamental part of the Power Reactor Information System (PRIS) database. They provide important information on the main components of an NPP unit, such as the reactor or turbine, briefly describe safety and essential auxiliary systems, and list technical specifications of significant plant equipment. In addition to the design specification data, the PRIS database can also accommodate other descriptive data, such as unit systems schematics and flow diagrams, local maps and photographs of the unit site. These characteristics can provide a comprehensive picture of unit design, technology and system configuration and also give a clear idea of unit location, appearance and nearby setting. The characteristics can also be used as basic criteria to select reactors with similar or identical design features. However, although the Member States regularly provide actual plant performance data to the PRIS database, it has not been always easy to keep the specification data up-to-date or even ensure that all the characteristics of individual units are complete. The set of unit design characteristics held in the Power Reactor Information System (PRIS) database has been reviewed in conjunction with the general revision and upgrade of the PRIS database and associated applications. The reviewers initially concentrated on how individual items of the design characteristics originally stored in the PRIS database had been completed for the reactor units. The results of the review showed that most specific design data were missing for many reactor units, while some design characteristics had no data for any units. Inadequate composition and selection of the characteristic items were identified as possible reasons for this unsatisfactory situation. No clear concept of the design characteristics had been established as to what kind of information should be provided. No definitions or instructions for the data providers had been available, which was discouraging from reporting. Some items were not clearly expressed and no options were provided. Some items were too detailed and it was difficult to obtain them. Other items varied with reactor core design changes or with operation and fuel cycle strategy, for example fuel enrichment, so it was difficult to enter just a single value.

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