Since the extension of the existing RWTDF facility was not feasible, an Interdepartmental Project (later called as National Project) was launched to resolve the problems of disposing LILW of nuclear power plant origin. The preparations for the siting work started in the framework of this project.
An underground investigation plan up to 2007 was elaborated in 2004, and was reviewed and subsequently approved by the South-Transdanubian Office of the Hungarian Geological Service. The investigation work formulated in the plan was intended to identify the rock volume suited to accommodate the repository. The investigation program was approved by the Minister exercising authority over the Central Nuclear Financial Fund on 14 December, 2004. The contractor selected for the implementation of the program was Mecsekérc Ltd. as a result of a public procurement tender.
The underground research operations started in February 2005 with the sinking of the incline-shafts. Two other significant events occurred in 2005. A public opinion referendum was held in the community upon the initiation of the municipal council of Bátaapáti. 90.7% of the voters representing a high voting ratio (75%) agreed with the intent of constructing a LILW repository in Bátaapáti. On 21 November 2005, the Hungarian Parliament granted its preliminary approval, in principle, in accordance with § 7 par. 2 of the Act on Atomic Energy, to start the operations intended to prepare for the construction of a LILW repository on the site, which was qualified before as geologically appropriate for the construction of such a facility. This Parliament Decision was supported by the overwhelming majority (339 MPs, 96,6%) of the representatives being present.
As a result of an intensive construction work, the NRWR obtained on 25 September, 2008 the licence of the competent Radiation Health Centre of the National Public Health and Medical Officer Service to commission the surface facilities of the repository. On 6 October 2008 there was the opening ceremony of the surface part of the NRWR. From that time on the surface part of the facility, including the technological storage building, operates under normal conditions.
By 2012, in the second phase of the construction the first two disposal chambers (I-K1 and I-K2) were excavated and the supporting technological systems for the I-K1 chamber were constructed. The licence of the competent authority to operate chamber I-K1 for final disposal of low and intermediate level waste came into force on 10 September, 2012. On 5 December, 2012 the ribbon cutting ceremony of the underground part of the NRWR took place and the first container with nine drums was transferred for final disposal in the I-K1 chamber. With this moment the final disposal of low and intermediate level radioactive waste started.