and hastily built sarcophagus that protected reactor No. 4. Though the project's development had been delayed several times, construction officially began in September 2010. The New Safe Confinement was financed by an international fund managed by the European Bank for Reconstruction and Development and was designed and built by the French-led consortium Novarka. In February 2013, a portion of the roof and wall adjacent to the covered part of the turbine hall collapsed into the entombed area of the turbine hall. The collapse did not affect any other part of the Object Shelter or the New Safe Confinement. No variances in radiation levels as a result of the incident were detected. The collapsed roof was built after the Chernobyl disaster and was later repaired. Novarka built a large arch-shaped structure out of steel wide, high, and long to cover the old crumbling concrete dome that was in use at the time. The structure was built in two segments which were joined in August 2015. In November 2016, the completed arch was placed over the existing sarcophagus. This steel casing project was expected to cost $1.4 billion, and was completed in 2017. The casing also meets the definition of a nuclear entombment device. A separate deal has been made with the American firm Holtec International to build a storage facility within the exclusion zone for nuclear waste produced by Chernobyl. This facility, named the Interim Storage Facility 2, will have storage for the 21,297 Spent Fuel assemblies currently at the power plant, which will be loaded into approximately 231 waste canisters, and stored in the ISF-2 for 100 years. In 2020, the storage facility was completed, and on November 18, 2020, the first canister of nuclear waste was loaded into the storage area. See also List of Chernobyl-related articles List of nuclear reactors Footnotes External links 1977 establishments in Ukraine Chernobyl disaster Chernobyl Exclusion Zone Nuclear power stations built in the Soviet Union Nuclear power stations using RBMK reactors Photovoltaic power stations in Ukraine Buildings and structures in Pripyat Buildings and structures completed in 1977 Energy infrastructure completed in 1977 Former nuclear power stations in Ukraine