scholarly journals The Effects of Degraded Digital Instrumentation and Control Systems on Human-system Interfaces and Operator Performance: HFE Review Guidance and Technical Basis

2010 ◽  
Author(s):  
J.M. O'Hara ◽  
G. Martinez-Guridi W. Gunther
Keyword(s):  
Control Systems ◽  
Human System ◽  
Operator Performance ◽  
Digital Instrumentation ◽  
System Interfaces ◽  
Technical Basis ◽  
And Control

An Investigation on the Minimum Inventory of Human System Interfaces for Plant’s Safe Operation

2010 ◽  
Author(s):  
Chih-Wei Yang ◽  
Tzu-Chung Yenn ◽  
Tsung-Chieh Cheng ◽  
Ming-Huei Chen ◽  
Tung-Ming Wu
Keyword(s):  
Safe Operation ◽  
Human System ◽  
Analytic Procedure ◽  
Digital Instrumentation ◽  
The Status ◽  
Design Requirements ◽  
Failure Conditions ◽  
Safe Condition ◽  
System Interfaces ◽  
And Control

This paper investigates the minimum inventory (MI) of human system interfaces (HSIs) (i.e. alarms, controls, and displays) for plant’s safe operation and represents the analytic procedure on the MI of HSIs developed for the digital instrumentation and control (I&C) equipments in the main control room (MCR). The MI of HSIs in the MCR indicates the HSIs that the operator always needs available to: (1) monitor the status; (2) perform and confirm a reactor trip; (3) perform and confirm a controlled shutdown of the reactor; (4) actuate safety related systems; (5) analyze failure conditions of the normal HSIs; (6) implement the plant’s emergency operating procedures (EOPs); (7) bring the plant to a safe condition; (8) carry out those operator actions shown to be risk important by the probabilistic risk assessment (PRA). The proposed analytic procedure on the MI of HSIs in this study can be used to (1) identify the MI of HSIs and their design requirements; and (2) addresses design requirements and implementation for the MI of HSIs. The contribution of this study is to describe the MI of HSIs needed to implement the plant’s EOPs, to bring the plant to a safe condition, and to carry out those operator actions shown to be risk important by the PRA.

Reliability of Reactor Control Digital Systems

2009 ◽  
Author(s):  
Mikhail A. Yastrebenetsky ◽  
Alexander A. Siora ◽  
Volodymyr I. Tokarev
Keyword(s):  
Control Systems ◽  
Nuclear Power ◽  
Power Plants ◽  
Digital Systems ◽  
Reliability Measures ◽  
Reactor Control ◽  
Operating Reliability ◽  
Digital Instrumentation ◽  
Digital Control Systems ◽  
And Control

In spite of wide expansion of digital systems for NPP control, information about realistic operating reliability measures of these systems is still lacking. The paper is a continuation of report [1] and contains results of analysis of operating reliability of digital control systems used in Ukrainian nuclear power plants. This paper contains: - reliability measures of digital instrumentation and control systems of first generation (designed in 1979–1983); - reliability measures of digital reactor control systems of second generation (designed after 2000) including reasons of failures; - analysis of the reasons of NPP violations due to digital instrumentation and control systems.

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