Safety of the nuclear power plants in Vietnam shall not be dependent on off-site services

Safety of the nuclear power plants in Vietnam shall not be dependent on off-site services (Internet image)

Article 9 of Circular 30/2012/TT-BKHCN stipulates that all foreseeable internal and external hazards, including the hazards directly or indirectly caused by human shall be identified and assessed. Hazards shall be assessed for determining the postulated initiating events and consequences in the design of items important to safety in Vietnam, including:

- Internal hazards including fire, explosion, flooding, missile generation, collapse of structures; falling objects, and pipe whip;

- Natural external hazards such as meteorological, hydrological, geological and seismic events. Human induced external hazards arising from military bases, industrial facilities, oil storage, chemical storage, transport activities.

In addition, in the short term, the safety of the plant shall not be dependent on off-site services such as electricity supply and fire fighting services. The period of self-protection of the nuclear power plant is determined based on the conditions off-site services conditions.

The seismic design of the plant must provide a sufficient safety margin to protect the nuclear power plant against seismic events and to cliff edge effects.

In addition, at the positions where many generating units are located, the design must take due account the potential simultaneous impacts on several generating units. The design must also take due account of the independent safety of other generating units when one of them is damaged.

More details can be found in Circular 30/2012/TT-BKHCN, which comes into force from February 11, 2013.  

Le Vy

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