The aim behind the Decommissioning Fund is to secure the costs for the decommissioning and break-up of nuclear facilities and for the disposal of the resulting waste. The proprietors of Beznau 1 and 2, Mühleberg, Gösgen and Leibstadt nuclear power plants and of the interim waste storage facility in Würenlingen are obliged to pay annual contributions into this fund.
On 25 June 2014, the Federal Council announced a revision of the Swiss Federal Ordinance on the Decommissioning Fund and the Waste Disposal Fund, including an adjustment of the calculation basis for the annual contributions to be paid into the two funds by the operators of nuclear facilities and power plants. The new calculation is based on a return on investment of 3.5 percent and an inflation rate of 1.5 percent. In addition, a safety surcharge of 30 percent on the calculated decommissioning and disposal costs has been introduced. The new regulations entered into force on 1 January 2015. Based on the new provisions, the administrative committee carried out an interim assessment and specified the new annual contributions for the remainder of the assessment period (2015 and 2016). With one exception, the nuclear power plant operators who are obliged to pay into the funds have lodged an appeal against the new annual contributions.
According to the current calculations, the decommissioning costs for Switzerland's five nuclear power plants and the central interim waste storage facility in Würenlingen amount to approximately 3 billion Swiss francs (pricing basis, 2011). The Swiss Federal Nuclear Safety Inspectorate (ENSI) verified these figures in collaboration with external experts. The decommissioning costs have to be covered in full by the fund.