Open Procedure For The Conclusion Of Framework Agreements, Pursuant To Art. 154 Of Legislative Decree No. 36/2023 And Ss.Mm.Ii. For The Assignment Of The Technical Assistance And Maintenance Service Of Steam Generators, Including Changes To Thermal Exchange Surfaces, Welding Parties Under Pressure And Anti -Corrosive Protective Coating, To Be Performed At The Thermovalizers Of The Hera Group