IEC 62118:2000

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