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BSI 16/30256643 DC:2016 Edition

$13.70

BS EN 60744. Nuclear power plants. Instrumentation and control systems important to safety. Safety logic assemblies used in systems performing category A functions. Characteristics and test methods

Published By Publication Date Number of Pages
BSI 2016 36
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PDF Catalog

PDF Pages PDF Title
6 FOREWORD
8 INTRODUCTION
11 1 Scope
2 Normative references
12 3 Terms and definitions
16 4 Abbreviations and acronyms
17 5 Safety logic assembly – principles and description
5.1 Safety logic assembly
5.2 Technology for safety logic assembly
18 5.3 Interfaces of a safety logic assembly
19 5.4 Dependability objectives
20 5.5 Modes of operation
5.6 Principles to reach the safety objectives
5.6.1 Safe operation in normal operation mode
5.6.2 Safe operation in abnormal operation mode
5.6.3 Protection against human error
21 5.7 Principles to reach the availability objectives
5.7.1 Availability of the NPP in normal operation mode
5.7.2 Availability of the NPP in abnormal operation mode
5.7.3 Protection against human error
6 Safety logic assembly – Design requirements
6.1 General
6.2 Functions
6.2.1 Specification of the functions
22 6.2.2 Manual controls
6.2.3 Response time
6.2.4 Display – indicators-alarms
23 6.2.5 Interface
6.3 Architecture and redundancy
6.4 Technology
6.5 Qualification
24 6.6 Maintenance
6.7 Isolation-separation
25 6.8 Power supply
7 Tests of safety logic assemblies
7.1 General
7.2 Type tests
7.2.1 General
7.2.2 Test sequences
7.2.3 Functional and performance validation tests
26 7.2.4 Qualification tests
7.3 Production tests
7.3.1 General
7.3.2 Tests on purchased parts or modules
7.3.3 Tests of spare parts
27 7.3.4 Production tests on manufactured safety logic assemblies
7.3.5 Tests on assembled cabinets
7.4 Tests on site
7.4.1 Equipment health checks before installation
7.4.2 Installation validation tests
28 7.4.3 Periodic tests
8 Quality assurance
29 Annex A (normative) Examples of safety logic assembly applications
30 Annex B (normative) Safety logic assembly – technological solutions
B.1 Introduction
B.1.1 General
B.1.2 Relays
31 B.1.3 Electromechanical relays
B.1.4 Solid state relays
32 B.2 Magnetic amplifiers
B.3 Fail-safe – dynamic logic – hardwired technology
B.4 Solid state circuits
B.4.1 General
33 B.4.2 Discrete components
B.4.3 Integrated components – HPD
34 Annex C (informative) Dependability and its attributes
C.1 General
C.2 Qualitative and quantitative attributes associated with dependability
36 Bibliography
BSI 16/30256643 DC
$13.70