Vietnam: 06 conditions for control of containment

According to Article 44 of Circular No. 30/2012/TT-BKHCN of the Ministry of Science and Technology of Vietnam, 06 conditions for control of containment of the nuclear power plant are specified as follows:

1. Systems shall be provided to control the pressure, temperature, and buildup of fission products, or other gaseous, liquid, and solid substances that might be released inside the containment and that could affect the operation of systems important to safety.

2. The flow routes between separate compartments inside the containment must be sufficient, and designed such that the pressure differentials occurring during pressure equalization in accident conditions do not result in unacceptable damage to the pressure bearing structure or systems important to the mitigation of accident consequences.

3. The capability to remove heat from the containment must be ensured to reduce and maintain pressure and temperature inside the containment as low as possible after an accident that release high-energy fluids. The systems that remove heat from the containment shall have high reliability and redundancy.

4. The systems that control fission products shall be provided to reduce the release of fission products to the environment when in accident conditions.

5. The systems that control the concentration of hydrogen, oxygen, and other substances in the containment shall be provided to prevent fire and explosion in accident conditions.

6. The use of coverings, thermal isolations, and coatings for components and structures inside the containment must to ensure the fulfillment of the safety functions even if they are damaged.

View details at Circular No. 30/2012/TT-BKHCN of the Ministry of Science and Technology of Vietnam, effective from February 11, 2013.

Le Vy

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