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Safety Engineering Division

D.Ponraju, Head, SED

P.Mangarjuna Rao, Head, CSS

Sanjay Kumar Das, Head, SLS
Lydia Gnanadas, Head, EAS

G.Punitha, Head, PCAS

 

Computational Simulation Section (CSS)
Sodium Loop Section (SLS)
Experimental Analysis Section (EAS)

Physical and Chemical Analysis Section (PCAS)

 

ACTIVITIES
  • Development and validation of high fidelity computational tools to simulate sodium pool and spray combustion phenomena

  • Assessment of various modes of sodium fire (spray, pool and combined) scenarios in SFR enclosures using the in-house computer codes

  • Extension of in-house fire hazard analysis code for sodium and conventional fire analysis

  • Mechanistic analysis of intra-subassembly molten core material dispersion due to sustained power coolant mismatch

  • Development and validation of in-house numerical codes to simulate inter-subassembly molten core material dispersion phenomenon using computational multiphase fluid dynamics approach

  • Consequences assessment of neutronic recriticality resultant energetics due to core wide disruption under severe accident scenario

  • Assessment of debris bed long term coolability characteristics of the single plate in-vessel core catcher design with multiple heat transfer paths under large core meltdown scenario

  • Development of multidimensional coupled neutronic and thermal hydraulic numerical models to address recriticality considerations due to core melting scenarios using multiphysics computational tools

  • Development of numerical models for design optimization of the laboratory scale induction melting system for molten fuel coolant interactions resultant debris characterization

  • Water hammer studies on various liquid filled piping configurations due to pressure surges

  • Coupled two-phase flow and fluid structure interaction analysis

  • Design, construction and commissioning of all experimental facilities at SED

  • Complete responsibility of internationally acclaimed SOFI, MINA and THEME experimental facilities

  • Conceptualization, design and construction of SASTRA facility

  • Material selection and feasibility studies towards development of sacrificial layered core catcher for future fast reactors 

  • Studies on flow blockage effects in subassembly at BLESS Loop

  • Compete engineering support and active participation in experiments of other facilities such as PATH, SFEF, SOCA and MFCI

  • Simulant experiments as well as numerical simulations related to PAHR to understand the Core melting, Molten core material dispersal, Melt Fragmentation/ Freezing, Debris settling & bed formation & Heat transferred to the coolant, Heat removal from dislocated core debris on Core-Catcher.  

  • 1: 4 experiment facility to study after CDA thermal loading

  • Study of Role of coolant depth, melt temp, melt mass on fragmentation & debris formation and distribution.

  • Measurement of Porosity & MMD of the Debris.

  • Study of Debris Bed Heat Transfer.

  • Measurement of pressure generated during FCI.

  • Temperature mapping with bottom heated debris in 1D & 2D geometries.

  • Experiments to simulate the breaching of grid plates by molten fuel and the subsequent fragmentation and debris settling phenomenon on core catcher with initial pressure of molten jet varied from 0-2 atm gauge pressure in Woods Metal-Water System.

  • Melt through time, area of opening / hole formed in GP-1 and GP-2, Debris distribution in GP and CCP, debris profile and MMD of the debris estimated.

  • Numerical prediction of melt-through time.

  • Experiments have been carried out with & without dummy SAs on top grid plate.

  • Videography at 1000 fps

  • HEATRAN-1 code developed and used for conduction problems and melting problems

  • Commercial CFD codes used for solving natural convection in enclosures and conjugate heat transfer problems

  • Numerical heat transfer analysis for jet breakup,  molten material relocation to core catcher and  design of improved core catcher 

  • Validation of computational models with experimental / analytical / benchmark solution

  • Development of heat transfer correlations from experimental / numerical results

  • Computation model for porous media heat transfer has been validated to simulate debris bed heat transport.

  • Development of an Advanced Sub-channel Thermal Hydraulic Analysis Systems frame work to study the effect of cross flow mixing on thermal hydraulic safety margins.

  • Qualification of Leak Collection System of PFBR

  • Large scale experiments on sodium spray fire and pool fire

  • Studies on sodium droplet  

  • Mitigation of sodium pool fire by nitrogen purging

  • Studies on Sodium Cable Interaction

  • Suppression of chemical activity of sodium by using nanomaterials

  • Development of carbon microsphere for sodium fire extinguishment

  • Studies on sodium infiltration in irradiated metallic fuel

  • Development of scrubber system for removal of sodium aerosol in air

  • Development of sodium disposal system

  • Development of sodium distillation system for sodium purification

  • Sodium spray characterization (droplet size distribution)

  • Development of numerical code for sodium fire studies   

  • Numerical simulation of gas bubble rising in a liquid pool of SFR

  • Sodium school for providing training in sodium Science and Technology