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Safety Classification Guideline Main Body, Commentary & JEAG Standard

Safety Classification Guideline Main Body, Commentary & JEAG Standard. 2011 6.6 Hitachi GE Nuclear Energy. 1.Introduction. Licensing Requirement. Standard of Academic Association. Nuclear Safety Commission

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Safety Classification Guideline Main Body, Commentary & JEAG Standard

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  1. Safety Classification GuidelineMain Body, Commentary & JEAG Standard 2011 6.6 Hitachi GE Nuclear Energy

  2. 1.Introduction Licensing Requirement Standard of Academic Association Nuclear Safety Commission Review Guide for Classification of Importance of Safety Functions of Light Water Nuclear Power Reactor Facilities -Main Body -Commentary Japan Electric Association JEAG 4612-2010 Review Guide for Classification of Electrical and Mechanical Equipments of Safety Importance

  3. 2. Objective Guideline • Main Body : Basic Concept of Importance Classification • Commentary : Sample of Classification of SCCs JEAG Standard :Sample of Area of Classified SCC including relating systems deeper and detailer

  4. 3. Classification LevelLevel 1 : Principal of Safety Classification Guideline Main Body deeper and detailer

  5. Level 2 : Basic Concept of Importance Classification Guideline Main Body deeper and detailer deeper and detailer

  6. Level3 : Sample of Classification of SCCs Guideline Commentary deeper and detailer deeper and detailer

  7. Level4 : Sample of Area of Classified SCC including related systems JEAG Standard (JEAG 4612-2010) deeper and detailer

  8. 4. Subject System & Related System? SSCs necessary for subject system’s Safety Functions SSCs to support reliability of subject system’s Safety Functions Safety functions SSCs to perform Safety Functions Classification Function highest reliability as reasonably achievable subject system direct related system class 1 Function Function class 2 high reliability subject system Function direct related system indirect related system Function reliability equivalent to or higher than ordinary industrial facilities. Function class 3 Function subject system direct related system indirect related system Function Function

  9. 5. Sample of Classified Area (BWRs) Flushing Line class3 non class Flushing Line Injection Valve Reactor class3 Pump Minimum Flow Line class1 Subject System Water Same requirement as class 1 is adopted for different class system connection Emergency Core Cooling Pump

  10. 5. Sample of Classified Area (PWRs) Check Valve Leak Test Line class3 class3 Water class3 Primary Coolant System Pump Test Line Pump Minimum Flow Line class1 non class Subject System (MS-1) Same requirement as class 1 is adopted for different class system connection non class Emergency Core Cooling Pump

  11. 6. Conclusion • Safety Classification guide is prepared in 2 documents. • Detailed definition is necessary in actual licensing and designing process. • In Japan, detail safety classification standard is prepared in order to get common image of safety class among Regulatory & Applicant for smooth licensing process. • VARANS can refer Japanese standard in licensing process of Japan ABWR & PWR .

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