Detail of EJ/T 939-2014

Introduction of EJ/T 939-2014

1 Scope This Standard specifies the classification criteria of the safety classification of structures, systems and components, seismic classification and quality assurance classification, and recommends the standard and specification adopted for design. This Standard is applicable to facility for wet storage of spent nuclear fuel, head end facility, chemical separation facility, trail end facility, radioactive waste processing facility and auxiliary facilities. 2 Normative References The following documents contain provisions, which, through reference in this text, constitute provisions of this Standard. The following standards contain provisions, which, through reference in this standard, constitute provisions of this Standard. For dated references, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, the parties who enter into agreement according to this Standard are encouraged to study whether the latest editions of these documents apply. For undated references, their latest editions apply. GB 150 Steel Pressure Vessels GB 151 Tubular Steel Heat Exchangers GB 50011 Code for Seismic Design of Buildings GB 50223 Standard for Classification of Seismic Protection of Building Constructions GB 50267 Code for Seismic Design of Nuclear Power Plants JB/T 4731 Steel Horizontal Vessels on Saddle Supports JB 4732 Steel Pressure Vessels-Design by Analysis JB/T 4735 Steel Welded Atmospheric Pressure Vessels EJ 877 Safety Design and Standard for Nuclear Fuel Reprocessing Plant HAF 003 Nuclear Power Plant Safety Requirements for Quality Assurance HAD 101/01 Earthquake Problems in Relation to Nuclear Power Plant Sitting HAD 102/02 Seismic Design and Verification for Nuclear Power Plant 3 Terminologies For the purpose of this Standard, the following terminologies and definitions apply. 3.1 Chemical equipment Such items as all kinds of extraction equipment, reactors, evaporators, containers, storage tanks, pumps, valves, piping and pipeline accessories which used for containing process medium in process system or safety system of reprocessing plant. 3.2 Safe parking condition The parking condition caused by process demand or accident in reprocessing plant, where requires to guarantee the monitoring capability of important process parameter, the normal operation of items implementing safety function and the effective containment of radioactive materials. 4 General Provisions

Contents of EJ/T 939-2014

Foreword I 1 Scope 2 Normative References 3 Terminologies 4 General Provisions 5 Division of Safety Class 6 Division of Seismic Classification 7 Division of Quality Assurance Class 8 Standard Specification for Design and Construction Appendix A Relationship among Safety Classification, Seismic Classification, Quality Assurance Classification and Standard Specification (Informative) Appendix B Classification Table of Typical Structures of Nuclear Fuel Reprocessing Plant (Informative) Appendix C Classification Table of Typical Systems and Components of Nuclear Fuel Reprocessing Plant (Informative) Appendix D Stress Limit Value of Container-class Chemical Equipment under Various Operating Conditions (Informative)