General requirements of operating licenses extension assessment for nuclear power plants
1 Scope
This document specifies the assessment process, determination of safety demonstration benchmarks, overall assessment for nuclear power plants, time-limited aging analysis, environmental impact assessment, safety improvement and commitment, supplement and modification of the final safety analysis report, preparation of application documents for operating license extension, renewal of safety benchmarks for extended operation and other requirements for the validity period extension of operating licenses for nuclear power plants.
This document is applicable to the assessment activities for the validity period extension of operating licenses for nuclear power plants [hereinafter referred to as "the operating license extension (OLE)"], and may serve as a reference for other nuclear facilities.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 41717-2022 Terminology of ageing management and life management for nuclear power plants
NB/T 20476.1 Operating license extension of nuclear power plant - Part 1: Screening of ageing management review and identification of time-limited aging analysis
NB/T 20476.2 Operating license extension of nuclear power plant - Part 2: Mechanical components aging management review
NB/T 20476.3 Operating license extension of nuclear power plant - Part 3: Ageing management review for electrical and instrumentation and control components
NB/T 20476.4 Operating license extension of nuclear power plant - Part 4: Ageing management review for structures and structural components
NB/T 20476.5 Operating license extension of nuclear power plants - Part 5: Environmental impact assessment
NB/T 20476.6 Operating license extension of nuclear power plant - Part 6: Time-limited aging analyses of reactor pressure vessel
NB/T 20476.7 Operating license extension of nuclear power plant - Part 7: Time-limited aging analyses of steam generator
NB/T 20476.8 Operating license extension of nuclear power plant - Part 8: Metal fatigue analyses
NB/T 20476.9 Operating license extension of nuclear power plant - Part 9: Time-limited aging analyses for electrical and instrumentation and control components
NB/T 20476.10 Operating license extension of nuclear power plants - Part 10: Time-limit ageing analysis for pre-stressed concrete containment
NB/T 20476.11 Operating license extension of nuclear power plant - Part 11: Guidelines for final safety analysis report supplement
NB/T 20476.12 Operating license extension of nuclear power plant - Part 12: Guideline for the preparation of applications
Technical policy on the extension of the validity period of the "Operating licenses for nuclear power plants" (Trial) [GUOHEANFA (2015) No. 280]
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 41717-2022 and the following apply.
3.1
ageing management review
review of the resource allocation, scoping, object screening, ageing mechanism analysis and ageing effect identification, monitoring and detection, assessment and mitigation, etc. of ageing management
3.2
time-limited ageing analysis
for the set operating period of units, analysis and calculation of whether the time-related ageing of the structures, systems and components, which are determined according to the established screening principles, will affect their ability to perform preset functions at the end of the assessment period
4 Abbreviations
For the purposes of this document, the following abbreviation applies.
FSAR: Final Safety Analysis Report
OLE: Operating License Extension
SSCs: Structures, Systems and Components
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Basic requirements
6 Assessment procedure
7 Determination of safety demonstration benchmarks
8 Overall assessment for nuclear power plants
9 Time-limited ageing analysis
10 Environmental impact assessment
11 Safety improvement and commitment
12 Supplement and modification of the final safety analysis report
13 Preparation of application documents for operating license extension
14 Renewal of safety benchmarks for extended operation
