Simulation of New NPP
Calculation and Simulation Complex of New Generation Power Plant with B-407
Tech Area / Field
- FIR-MOD/Modelling/Fission Reactors
3 Approved without Funding
Research Institute of Technology, Russia, Leningrad reg., Sosnovy Bor
- ABB Power Oy, Finland, Helsinki\nSiemens AG / Power Generation (KWU), Germany, Erlangen\nCORYS, Spain, Madrid
Project summaryOne of the major challenges in nuclear energy is assurance of new generation power units safety through the introduction of passive safety systems. However, new concepts of safety systems are not the sole solution to the problem. Control systems should be designed which are able to ensure power unit safe operation at any initial event. For the development of such control systems, at early design stages tooling is needed which would provide for carrying out complex investigations of the facility dynamics in conjunction with control systems.
The Project involves development of a complex of soft and hardware calculation and Simulation Complex (CSC) which can be used for solving design-stage problems of power unit and its control systems at a new technical level.
The basis for Calculation and Simulation complex is all-mode mathematical model of the power unit dynamics functioning together with mnemonics of the simulated equipment. The active elements of mnemonics-valves, pumps, regulators-are related to" the mathematical model variables through software. This makes possible control of technological systems operation, using computer screen.
Calculation and Simulation Complex provides a means for:
- investigation of physical processes in NPP systems under transient and accident conditions;
- debugging of software for the power unit information systems;
- development of diagnostic algorithms for equipment and operator information aids, etc.
However, the basic purpose of CSC is simulation of the controlled object when debugging the software of comprehensive control systems and its parts and developing, checking and optimizing control algorithms for the power unit base-load and maneuvering operations.
Requirements for CSC are based on the problems set up, one of them, namely ensuring the count rate in real time, being critical. This is due to the fact that, in addition to the use in theoretical development of control algorithms, CSC can be employed for checking the operation of real-time hardware. Current power units are controlled with regard for local power in a core, so spatial description of neutron field dynamics should be incorporated into mathematical model. Then mathematical model of the power unit dynamics has to meet several mutually exclusive requirements: cover all technological systems, simulate a core in space-time approximation, and operate in real time as well. Moreover, verification of mathematical model is required, and, before the pilot power unit is started up, it has to be performed from a limited series of local experiments carried out at thermal physical test facilities. All this suggests that there are difficulties in implementation of a project like that.
After the debugging of control system algorithms as part of CSC, the latter is further used as an object simulator, to which real control system cabinets with real equipment to be used in the power unit, instead of mathematical regulators are connected.
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