Software reliability analysis for safety‐critical and control systems

2019 ◽  
Vol 36 (1) ◽  
pp. 340-353 ◽  
Author(s):  
Pramod Kumar ◽  
Lalit Kumar Singh ◽  
Chiranjeev Kumar
2022 ◽  
Vol 166 ◽  
pp. 108812
Author(s):  
Vinay Kumar ◽  
Kailash Chandra Mishra ◽  
Pooja Singh ◽  
Aditya Narayan Hati ◽  
Mohan Rao Mamdikar ◽  
...  

2018 ◽  
Vol 65 (5) ◽  
pp. 1080-1090 ◽  
Author(s):  
Vinay Kumar ◽  
Lalit Kumar Singh ◽  
Pooja Singh ◽  
Karm Veer Singh ◽  
Ashish Kumar Maurya ◽  
...  

2020 ◽  
pp. 52-61
Author(s):  
A. Perepelitsyn ◽  
O. Illiashenko ◽  
V. Duzhyi ◽  
V. Kharchenko

The paper overviews the requirements of international standards on application of diversity in safety-critical NPP instrumentation and control (I&C) systems. The NUREG7007 classification of version redundancy and the method for diversity assessment are described. The paper presents results from the analysis of instruments and design tools for FPGA-based embedded digital devices from leading manufacturers of programmable logics using the Xilinx and Altera (Intel) chips, which are used in NPP I&C systems, as an example. The most effective integrated development environments are analyzed and the results of comparing the functions and capabilities of using the Xilinx and Altera (Intel) tools are described. The analysis of single failures and fault tolerance using diversity in chip designs based on the SRAM technology is presented. The results from assessment of diversity metrics for RadICS platform-based multi-version I&C systems are discussed.


Author(s):  
Lixuan Lu ◽  
Jin Jiang

Deregulation forces Nuclear Power Plants (NPPs) to operate not only safely, but also more economically. Instrumentation and Control (I&C) systems in NPPs play an important role to reduce operational related costs. Therefore, a well-planned test and maintenance (T&M) strategy for I&C systems is more important then ever in this deregulated energy market. This paper presents a general T&M framework for digital I&C systems in NPPs. There are three main parts within this framework: probabilistic safety assessment (PSA), reliability analysis, and costs evaluation. PSA is used to set risk-informed unavailability limits. Reliability analysis is used to derive the relation between the unavailability and the T&M interval. Costs associated with not only T&M, but also reactor mal-shutdowns are evaluated. The Shutdown System Number One (SDSI) in Canadian Deuterium-Uranium (CANDU) based NPPs is used as an example system to illustrate the proposed framework.


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