NB/T 20031-2010Control of Hydrogen Concentration in the Containment after Accidents in Nuclear Power Plants of Pressurized Water Reactor (English PDF)

1 Scope

This standard specifies the requirements for control of hydrogen concentration in the containment after accidents in nuclear power plants of pressurized water reactor (including design basis accidents and beyond design basis accidents) and the design principles and arrangement principles of the hydrogen concentration control system.

This standard is applicable to control of hydrogen concentration in the containment after accidents in nuclear power plants of pressurized water reactor.

2 Normative References

The following referenced documents are indispensable for the application 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 15761 Design and Construction Rules for Nuclear Island Systems of 2×600MW PWR Nuclear Power Plants

GB/T 17569 Classification for the Items of Pressurized Water Reactor Nuclear Power Plants

GB 18871 Basic Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources

HAF 102 Safety Specifications for Design of Nuclear Power Plant

3 General

3.1 The nuclear power plant of pressurized water reactor shall be equipped with a hydrogen concentration control system to control the hydrogen concentration in the containment after the accidents and to prevent the hydrogen and oxygen accumulated in the containment from reaction to cause slow combustion (slow diffusion combustion) and deflagration (fast turbulent combustion or flame acceleration) or detonation (combustion at supersonic speeds in a mixture of hydrogen, water vapor and air) which may cause failure of containment due to over-temperature and over-pressure. See Annex C for guidelines for judgment of the combustion state of hydrogen.