Detail of GB/T 12726.5-1997

Introduction of GB/T 12726.5-1997

1 Scope This standard specifies criteria for the design, selection, functional location, testing and calibration of installed radiation monitoring equipment, and provides technical characteristics and test procedures of the monitoring equipment. This standard is applicable to equipment used for monitoring airborne radioactivity within nuclear power plants with light water reactors during and after accident conditions. The following applications are not fall within the scope of this standard: — equipment for continuously monitoring radioactive noble gases in gaseous effluents (GB/T 12726.2); — process stream in light water nuclear power plants (GB/T 12726.4); — equipment for continuously monitoring radioactivity in gaseous effluents (GB 7165.1 to GB 7165.6). Accident may be monitored by the equipment include loss of coolant accidents, waste gas decay tank ruptures, spent fuel drop accidents or other postulated conditions resulting in fuel cladding failures. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. GB 7165.1-87 Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents — Part 1: General Requirements GB 7165.2-88 Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents — Part 2: Specific Requirements for Aerosol Effluent Monitors GB 7165.3-89 Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents — Part 3: Specific Requirements for Noble Gas Effluent Monitors GB 7165.4-89 Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents — Part 4: Specific Requirements for Iodine Monitors GB 7165.5-88 Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents — Part 5: Specific Requirements for Tritium Effluent Monitors GB 7165.6-89 Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents — Part 6: Specific Requirements for Transuranic Aerosol Effluent Monitors GB/T 12726.1-91 Radiation Monitoring Equipment for Accident and Post-accident Conditions in Nuclear Power Plants — Part 1: General Requirements GB/T 12726.2-91 Radiation Monitoring Equipment for Accident and Post-accident Conditions in Nuclear Power Plants — Part 2: Specific Requirements for Equipment for Continuously Monitoring Radioactive Noble Gases in Gaseous Effluents GB/T 12726.4-1995 Radiation Monitoring Equipment for Accident and Post-accident Conditions in Nuclear Power Plants — Part 4: Process Stream Radiation Monitor GB/T 13625-92 Seismic qualification of electrical equipment of the safety system for nuclear power plants EJ/T 567-91 Terminology for nuclear reactor instruments 3 Definitions For the purposes of this document, the definitions given in GB/T 12726.1 apply. 4 Classification of Air Monitors

Contents of GB/T 12726.5-1997

Foreword II IEC Foreword III 1 Scope 2 Normative References 3 Definitions 4 Classification of Air Monitors 5 Design Principles 6 Systems to be Monitored 7 Air Monitor Design 8 Test Procedures 9 Certificate, Manual and Type Test Report Appendix A (Informative) Examples of Possible Installation Location and Upper Measuring Limit Ranges for Air Radioactivity Monitoring Equipment in Light Water Reactors