Vertical steam generators for VVER NPPs

Human Factor Estimation for ET Results Reliability of SG Tubes of NPPs with VVER

Steam generator (SG) tube integrity is of great importance for safe and reliable nuclear power plant (NPP) operation. The application of eddy current testing (ET) to evaluate SG tube integrity is recognized worldwide and has been used over several decades. However, at times, ET results are considered questionable. A decision to leave a defective SG tube in operation is made based on the ET resu...

Steam Generators and Steam Distribution Networks

Wavelet network controller for nuclear steam generators

Poor control of steam generator water level is the main cause of unexpected shutdowns in nuclear power plants. Particularly at low powers, it is a difficult task due to shrink and swell phenomena and flow measurement errors. In addition, the steam generator is a highly complex, nonlinear and time-varying system and its parameters vary with operating conditions. Therefore, it seems that design o...

Increasing Results Reliability for SG Tubes of NPPs with VVER based on Experimental Assessment of Human Factor

Problem of nuclear power plant (NPP) safe operation and risks reducing for nuclear power plants is one of the most actual ones. Taking into account the fact that NPP unit lifetimes are being extended beyond their design period, this problem becomes more and more important. One of the main and critical subsystems for NPP safe operation is steam generator (SG) consisting of (except other systems)...

Multi-objective optimization of heat recovery steam generators

In this paper, a multi-objective method is used to optimize a heat recovery steam generator (HRSG). Two objective functions have been used in the optimization, which are irreversibility and HRSG equivalent volume. The former expresses the exergetic efficiency and the latter demonstrates the cost of the HRSG. Decision variables are geometric and operational parameters of the HRSG. The result...