الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
The electrical system at a nuclear power plant is designed to provide a diversity of reliable power sources which are physically and electrically
isolated so that any single failure will affect only one source of supply and will not propogate to alternate sources.
-Froi-ic- the Safety point of view, it is necessary’ to study the events of loss of off-site power; loss of on.-site power, and simultaneous loss of both
off-site and on-site power.
This thesis dLscusses the problem of improving
the reliability or oii -site power.
A litrature survey on the description, fuction, and design criteria for EPS in NPPs is presented.
The model adopted to study the reliability and availability of on-site power system in NPPs is the Markov Model.
Also a general trend analysis as well as a
trend analysis guided by the redundancy level are
provided.
Calculations and results are tabulated, and the time behavior of reliability and unavailability is
. ncl uded,.