BS ISO 26802:2010

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Functions ensured by the ventilation system
5 Architecture and description of the different ventilation
   systems
6 Safety aspects for ventilation systems
7 Requirements for the design of ventilation systems
8 Management of specific risks
9 Dispositions concerning the management and the operation
   of the ventilation systems
10 Control and instrumentation
Annex A (informative) - Typical radioactive products in nuclear
        reactors
Annex B (informative) - Examples of general confinement concepts
        for nuclear power reactors
Annex C (informative) - Examples of safety classification for
        nuclear power reactors
Annex D (informative) - Examples of classification of working
        areas according to radiological contamination hazard
Annex E (informative) - Example of classification of types of
        ventilation, according to radiological contamination
        hazard - Recommended ventilation configurations
Annex F (informative) - Existing requirements for aerosol filters
Annex G (informative) - Examples of loads to consider during the
        design of NPP ventilation systems
Annex H (informative) - Typical values of leaktightness for
        containment and ventilation systems and periodicities
        of associated controls
Annex I (informative) - Primary containment envelope status
Bibliography

Defines the applicable requirements related to the design and the operation of containment and ventilation systems of nuclear power plants and research reactors.

This International Standard specifies the applicable requirements related to the design and the operation of containment and ventilation systems of nuclear power plants and research reactors, taking into account the following.

For nuclear power plants, this International Standard addresses only reactors that have a secondary confinement system based on International Atomic Energy Agency (IAEA) recommendations (see Reference [10]).

For research reactors, this International Standard applies specifically to reactors for which accidental situations can challenge the integrity or leak-tightness of the containment barrier, i.e. in which a high-pressure or high-temperature transient can occur and for which the isolation of the containment building and the shut-off of the associated ventilation systems of the containment building is required.

For research reactors in which the increase of pressure or temperature during accidental situations will not damage the ventilation systems, the requirements applicable for the design and the use of ventilation systems are given in ISO17873. However, the requirements of this International Standard can also be applied.