IEC 62118:2000
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Nuclear reactor instrumentation - Pressurized water reactor (PWR) of VVER design - Monitoring adequate cooling within the core during shutdown
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
31-12-2021
English - French
09-11-2000
FOREWORD
INTRODUCTION
1 Scope and object
2 Normative references
3 Definitions and abbreviations
4 Operating conditions
4.1 General
4.2 Normal power operation
4.3 Hot shutdown operations
4.4 Abnormal and accident conditions
4.5 Cold shutdown operations
5 Measurement methods
5.1 General
5.2 RPV water level measuring devices
5.3 RPV inlet/outlet pipe water level measuring
devices (systems as shown in figure 2)
5.4 Core exit temperature sensing devices
6 Instrumentation requirements
6.1 General
6.2 Differential pressure measurement
6.3 Heated sensor measurement
6.4 Ultrasonic liquid level measurement
6.5 Temperature sensing devices
7 Data processing
8 Presentation of information
9 Verification and calibration
10 In-service testing and maintenance
11 Qualification
12 Documentation
Annex A (informative) Events with potential core cooling
degradation at VVERs
Annex B (informative) Plant operating states
Figure 1 - PWR configuration: (VVER-440) - Horizontal
steam generators
Figure 2 - PWR configuration: (VVER-1000) - Horizontal
steam generators
Figure 3 - Water level measurement by differential pressure
method for VVER 1000
Figure 4 - Thermal-hydraulic considerations affecting water
level measurements (VVER-1000 systems) at reduced
inventory and reverse flow
Figure 5 - Water level measurement by direct acting
transmitter (VVER-1000 systems) at reduced
inventory and reverse flow
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