The comprehensive I and C modernization project ANIS+ of the Swiss NPP Leibstadt
- Kernkraftwerk Leibstadt AG, CH-5325 Leibstadt (Switzerland)
The Swiss Nuclear Electricity Production consists of four sites with a total of 5 Reactors. Together they have a capacity of 3220 MW and cover 40% of the total Swiss Electricity production. Leibstadt is the first Swiss NPP which started a comprehensive modernization project of all process related I and C-equipment in regard of an intended operation at least until 2045. The project will take about 15 years since the stepwise implementation will be only possible during the scheduled outages. The first modernization step, the replacement of most of the former stand alone process computers including the Safety Parameter Display System SPDS by a common platform was finished in this year's outage with a delay of 2 years over the original target line. The project is rated as category C according IEC 61226 by the Swiss nuclear authority (V and V requirements). This first step is at the beginning an integrated plant information system for monitoring only, but it forms already the operating and monitoring level of the future integrated Process Control System (PCS) for operational- as well as safety-I and C, fully based on digital technology. With each of the upcoming further modernization steps, parts of the process level will be added to the digital system by replacing the existing analog equipment for signal interrogation, component control (on-off as well as modulating control) and automatic functions like sequencer or switch over functions. Today's I and C equipment comprises more than 20 different systems from different suppliers, but mostly based on a common cabling- and connection concept and homogenous operating and signalization concept. The structure of the existing I and C-systems in the main plant is mostly according to I and C-functions and not according to process functions, which was a benefit during the original design and construction but has some disadvantages in regard of modifications or addition of new features and for the modernization. In the auxiliary plants a multitude of structures exists, so that overall there is a rather inhomogeneous structure prevailing. One objective of the modernization is the transformation from the control function oriented structure to a process oriented structure to optimize the system performance, e.g. by minimizing data communication requirements and to form an optimum situation for the future maintenance and expandability. The paper will deal with I and C-aspects as well as with HSI- resp. HFE-aspects and issues, mainly in regard of preparation of the overall project, points to take care of and lessons learned with the first implementation step. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 22030102
- Resource Relation:
- Conference: NPIC and HMIT 2006: 5. International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology, Albuquerque, NM (United States), 12-16 Nov 2006; Other Information: Country of input: France; Related Information: In: Proceedings of the 5. International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology| 1430 p.
- Country of Publication:
- United States
- Language:
- English
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