Environmental Engineering Reference
In-Depth Information
Chapter 11
Safety Parameters
Display Systems
Vladislav Goldrin
State Scientiic and Technical Centre for Nuclear and Radiation Safety, Ukraine
ABSTRACT
The chapter contains a description of Safety Parameters Display Systems (SPDS) implemented at NPP
units WWER-1000 of Ukraine. These systems were designed by Westinghouse Electric Corporation (USA).
LLC “Westron” (Ukraine) took development and implementation of these systems. These systems were
provided at 11 NPP units in the framework of the International Nuclear Safety Program with the support
of DOE (USA). The general purpose of SPDS is to provide support for operators, when abnormality of
NPP unit operational conditions must be determined rapidly. The chapter considers the purpose and the
functions of these systems, speciic features of the displaying information about the state of the functions,
which are critical for NPP unit safety, and the structure of systems. Implementation of SPDS project at
11 units of Ukrainian NPPs is a good example of USA and Ukraine collaboration in the nuclear area.
Organization of this large-scale modernization is described.
INTRODUCTION
eters which could quickly estimate state of NPP
unit.
The SPDS was created as part of the overall unit
I&C system, which executes a large number of
functions that are independent with respect to other
individual I&C systems and is integrated with the
existing systems at the design level of linkage.
SPDS realized critical safety functions on
monitoring in all NPP operation modes with the
aim of identifying the signs of violation of critical
safety functions and definition of personnel ac-
tions which are priority from safety point of view.
SPDS displays minimized and group (from
safety point of view) set of technological param-
BACKGROUND
The development of the safety parameter display
system (SPDS) was started at the time of the acci-
dent at the Three-Mile Island (TMI) nuclear power
plant in 1979, which demonstrated the inadequacy
of displaying information by traditional methods.
Following the accident at TMI, the regulatory
body of the United States, the NRC, issued report
NUREG-0696 (US NRC, 1981), which calls for the
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