IEC 61559:1996

FOREWORD
SECTION 1: GENERAL
Clause
1.1 Scope and object
1.2 Normative references
1.3 Degrees of requirements
1.4 Terminology
     1.4.1 Manufacturer and purchaser
     1.4.2 Category "C" classification
     1.4.3 Detector subassembly (DA)
     1.4.4 Processing unit (PU)
     1.4.5 Alarm unit (AU)
     1.4.6 Central computer; centralizer (CC)
     1.4.7 Monitoring unit (MU)
1.5 Test nomenclature
     1.5.1 Qualification tests
     1.5.2 Acceptance test
SECTION 2: DESIGN REQUIREMENTS
2.1 General remarks
     2.1.1 Introduction
     2.1.2 Safety classification
     2.1.3 System configuration
     2.1.4 Location of detector subassemblies
2.2 Design requirements for the subassemblies
     2.2.1 Detector subassembly
     2.2.2 Processing unit
     2.2.3 Alarm units
     2.2.4 Centralizer (central computer)
     2.2.5 Checking normal operation of the equipment
     2.2.6 Power supply requirements
SECTION 3: TEST PROCEDURES
3.1 Test requirements
     3.1.1 General
     3.1.2 Test performed under standard test conditions
     3.1.3 Test performed with variation of influence
           quantities
3.2 Test procedures for the detection subassembly
3.3 Test procedures for the monitoring unit
     3.3.1 Alarm trip range
     3.3.2 Equipment failure alarms
     3.3.3 Alarm response time and stability
3.4 Test procedures for the centralizer (central computer)
     3.4.1 Individual tests of access channels
     3.4.2 Whole tests of access channels
3.5 Test procedures for effects of power supply and
     environmental variations
     3.5.1 Power supply variations
     3.5.2 Power supply variations (interruptions and
           transients)
     3.5.3 Ambient temperature and humidity
     3.5.4 External electromagnetic fields
     3.5.5 External magnetic fields
SECTION 4: DOCUMENTATION
4.1 Report on type testing
4.2 Certificate
4.3 Operating and maintenance manual
Tables
Figures
Annexes
A Selection of a measuring unit
B Guidance on location of detector subassemblies

Applies to centralized systems intended for continuous monitoringof radiation and/or levels of radioactivity in nuclear facilities,primarily in support of radiological protection in the workingareas. Specifies general characteristics, general test procedures,radiation, electrical, safety, and environmental characteristicsand the identification certificate for the assemblies.