The containment system is able to withstand both internal pressure (5 kg per sq cm) and external impacts such as air shock waves creating the pressure of 30 kPa or a plane crash. The total weight of steel structures exceeds 230 tons. The inner base diameter of the containment is 44 m. “Once the dome is in its permanent position, the installation of steel structures of the internal reactor containment dome is over,” noted Sergei Olontsev, ASE Senior Vice President for Russian Projects. “In a few days, the construction team will start reinforcing and concreting the steel structures of the internal containment.” The design of Belarus Unit 2 provides for a double (internal and external) containment dome to be placed on the reactor building. This dome houses the core reactor equipment. The containment dome is the most important safety component of every nuclear power plant as it forms an ultimate physical barrier that curbs radioactive emissions and ionizing radiation from inside.