GB/T 40620-2021Guidelines for fire hazard analyses in nuclear power plants (English PDF)
核动力厂火灾危害性分析指南
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 11, 2021
Implementation date
May 1, 2022
Scope
GB/T 40620-2021 is the English-translated version of 核动力厂火灾危害性分析指南.
GB/T 40620-2021 gives guidance on carrying out fire hazard analysis for nuclear power plants. The analysis it describes covers data collection, the analysis of how a fire develops and what effects it has, the evaluation of whether fire safety measures are adequate, iterative analysis and quality assurance.
It applies to the nuclear island buildings and other nuclear safety related buildings of new or operating land-based fixed thermal neutron reactor plants, and other types of nuclear power plants and nuclear facilities may use it as a reference.
Its terms include combustion, fire, fire barrier, fire compartment, fire cell and fire load, and it refers to HAD103/10 on fire safety in plant operation. It was issued on 11 October 2021 and has applied since 1 May 2022.
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Document preview — GB/T 40620-2021
National Standard of the People's Republic of China
- ICS
- 27.120.20
- Classification
- F 63
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
1 Scope
This document provides guidelines for fire hazard analysis of nuclear power plants, including data collection, fire development analysis and fire effect analysis, prevention Evaluation of adequacy of fire safety measures, iterative analysis and quality assurance, etc.
This document is applicable to the nuclear island plant and other nuclear safety related plants of the newly built or in operation onshore fixed thermal neutron reactor nuclear power plant and other nuclear safety related plants.
For the fire hazard analysis of equipment workshops, other types of nuclear power plants and nuclear facilities can be used as a reference.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
HAD103/10 Nuclear power plant operation fire safety
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Combustion
The exothermic reaction between a substance and oxygen is usually accompanied by the production of flames, and/or light emission, and/or the production of smoke.
3.2 Fire
A combustion process characterized by heat emission and accompanied by smoke or flame or both, spreading in time or space in an uncontrollable form.
3.3 Fire barrier
A barrier used to limit the consequences of a fire.
Note: Including walls, floors, ceilings or devices used to block door openings, gates, penetrating parts and ventilation systems.
3.4 Fire compartment
A factory building or part of a factory building constructed to prevent the fire from spreading within a specified time.
Note: The fire zone may consist of one or more rooms, all of which are surrounded by fire barriers.
3.5 Fire cell
In order to protect important safety items, set up fire protection facilities (such as limiting the amount of combustible materials, space separation, fixed fire extinguishing systems, fire protection coatings) Or other facilities) to isolate the fire area.
Note: Through this setting, the isolated system will not be significantly damaged.
3.6 Fire load
The sum of all combustible materials (including walls, partitions, floors and ceiling surfaces) that may be burned to release heat in the space.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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