Saboo, AnirudhAnirudhSabooKumar, ManishManishKumarKhan, MohammedsalimMohammedsalimKhanSajish, S. D.S. D.Sajish2025-09-042025-09-042024-06-302-s2.0-105027888635https://repository.iitgn.ac.in/handle/IITG2025/30706Paris agreement envisions a net zero carbon target by 2050. A key step towards the same will be phasing out of coal-based heat generation for power production, and replacing the same with nuclear energy. Such an approach would enable the usage of existing power transmission and distribution infrastructure. In addition, the nuclear power plants will be deployed at new locations. In India, nuclear energy is used to produce approximately 7 GW of a total of 482 GW of electricity generation capacity. Roughly 80% of the total electricity produced comes from fossil fuels. Based on the current energy consumption, to replace even 50% of the fossil fuel-based energy generation by nuclear power, it will require over 1600% increase in the generation of nuclear power. Such a large scale deployment of nuclear energy is feasible only if a particular reactor design can be deployed at multiple sites, which will help save time and costs to secure regulatory clearances. This overarching goal can be achieved through the usage of seismic isolation technology, which has been employed to reduce seismic risk in critical infrastructures across the world. This paper examines how seismic isolation can influence the acceleration response of a generic fast reactor (GFR), a variant of the prototype fast breeder reactor (PFBR) presently being commissioned at Kalpakkam, India. The reactor consists of main vessel which holds the liquid sodium coolant and houses the reactor internals. These internals include the inner vessel, core support structure, control plug, etc. A lumped-mass-stick-model was developed, and validated through corresponding finite element model and the previously reported data. The system was subjected to ground motions representing varying seismic hazard. A reduction in peak floor ordinates (e.g., by a factor between 5 and 10) and peak story drift (e.g., by a factor between 3 and 6) was observed due to seismic isolation. Further, floor spectral ordinates for the isolated superstructure subjected to 1.0g ground motions were smaller than that for fixed-base structure subjected to 0.25g motions, suggesting seismic isolation can effectively help the deployment of GFR across regions with disparate seismic hazard scenarios. It should be noted that the floor spectra in vertical direction for the fixed-base and isolated-base models of GFR was found to be similar.en-USConference Paper123456789/393