Environmental Engineering Reference
In-Depth Information
Chapter 13
NPP:
Power Grid Mutual Safety Assessment
Eugene Brezhnev
Centre for Safety Infrastructure-Oriented Research and Analysis, Ukraine
Vyacheslav Kharchenko
National Aerospace University named after N.E. Zhukovsky KhAI,
& Centre for Safety Infrastructure-Oriented Research and Analysis, Ukraine
ABSTRACT
The problem of the safe interaction between a Nuclear Power Plant (NPP) and a Power Grid (PG),
considering the Fukushima nuclear accident, is becoming topical. There are a lot diferent types of inlu-
ences between NPPs and PG, which stipulate NPPs' safety levels. To evaluate the inluences, two metrics
are proposed: linguistic and numerical. The approach to the NPP-PG safety assessment is based on the
application of Bayesian Belief Network (BBN), where nodes represent diferent PG systems and links are
stipulated by diferent types of inluences (physical, informational, geographic, etc). It is suggested to
evaluate criticality of the PG system considering the change of criticalities of all connected systems. The
total criticality of each node in BBN is assessed considering particular criticalities caused by diferent
types of inluence. The complex nature of NPP and PG mutual interaction calls for the need for integra-
tion of diferent methods that use input data of diferent qualimetric nature (deterministic, stochastic,
linguistic). Application of one speciied group of risk methods might lead to loss and/or disregard of a
part of safety-related information. BBN and Fuzzy Logic (FL) represent a basis for development of the
hybrid approach to capture all information required for safety assessment of NPP - PG under uncer-
tainties. Integration of FL-based methods and BBNs allows decreasing the amount of input information
(measurements) required for safety assessment, when these methods are used independently outside from
the proposed integration framework. An illustrative example for the NPP reactor safety assessment is
considered in this chapter.
INTRODUCTION
sector is of key importance for the any national
economic development, as both production and
municipal facilities require electric power for their
operation. The power industry consists of power
The reliable and safe operation of the energy
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