ProSIM is an approved engineering consultant with DAE (Department of Atomic energy) entities in India such as NPCIL, IGCAR, BARC, BHAVINI working along with their major EPCs and their vendors. Internationally, ProSIM is a part of ITER-IO projects via ITER-IN/EPC contractor.
ProSIM has worked on design evaluation of various systems/components in a nuclear power plant (Seismic Design Verification) as per various codes (ASME, RCCMR, API, BP, ANSI etc).
ProSIM has developed macros/ scripts for the Seismic Design Verification of all safety and seismic classes, including NINS of nuclear equipment (active/passive). ProSIM has experience in both OBE (Operating Basis Earthquake) and SSE (Safe-Shutdown Earthquake) methods for Seismic Design Verification, based on requirement – either FRS (Floor response spectra) or equivalent static methods using FEA based software.
ProSIM expertise includes Seismic evaluation (seismic structural integrity) as per ASME codes (Section III, Subsection NB, NC, ND, NF etc), IS1893 or similar codes; seismic design optimization to enable the design pass the seismic evaluation, modify the design to suit the site conditions, generate reports as per requirements of operators (such as NPCIL or ITER or BHAVINI); provide clarifications to regulatory agencies (such as AERB) for design documents.
ProSIM has worked on several packages of nuclear power plants (nuclear structural integrity assessment) including BOTIP, STG, Turbine, CS, PPP, Switchyard, C&I, IDCT, NDCT etc. ProSIM has worked on several hundreds of projects in various systems and subsystems and equipment.
The gravity analysis is performed to know the behaviour of the heat exchanger for its own weight. This is a part of the seismic evaluation. The response of the heat exchanger for gravity load is done by static analysis.
Design Pressure analysis
The design pressure analysis is performed to capture the effect of the maximum pressure exerted by the fluid. The static analysis is carried out to know the response of the heat exchanger. This load case is combined dead weight and seismic loads to perform the Seismic Design Verification.
Seismic analysis is performed to capture the behaviour of a heat exchanger for earthquake load. Both operational basis earthquake (OBE) and Safe shutdown earthquake (SSE) will be considered for seismic design verification.
The first natural frequency is more than the cut-off frequency, the floor response spectra analysis will be ruled out and equivalent static analysis will be performed. The load combinations are done for various service levels. The stress value is compared with the allowable limits and henceforth the seismic qualification is done.
The fluid inside side heat exchanger will be carrying some amount of temperature. The stresses and displacement developed by the temperature are captured by thermal analysis.
The respective loads are combined with seismic loads and seismic qualification is done. The heat exchanger has several components. Each component is qualified for seismic load combinations.