Investigations on box type Configuration of roof slab for Prototype fast breeder reactor

Abstract

The roof slab which forms the top shield of the nuclear reactor newlinesupports all the components of the reactor Roof slab is essentially a box newlinestructure with top and bottom plates interconnected by vertical shells and newlineradial stiffeners welded to them It provides biological and thermal shielding newlinein the top axial direction of the reactor The diameter and height of the roof newlineslab in the 500 MWe Prototype Fast Breeder Reactor PFBR are 12 9m and newline1 8m respectively PFBRs are designed based on the Operating Basis newlineEarthquake OBE and Safe Shutdown Earthquake SSE which are newlinecategorized under level A and level D loadings respectively newlineThis dissertation investigates the structural integrity of the roof slab newlineof 500MWe PFBR under static and dynamic including seismic loading newlineconditions The primary objective of this research work is to predict the newlinestructural integrity of the roof slab of PFBR by performing numerical and newlineexperimental analysis on scaled down model of roof slab for design newlineoptimization considering static and dynamic loading conditions newlineA detailed literature survey has been carried out to identify the newlineresearch approach to accomplish the objective Since the roof slab under newlineconsideration is a massive structure weighing 155 tonnes experimental newlineanalysis using this huge structure calls for larger laboratory space higher newlineloading capacity huge test structure and high cost necessitating the adoption newlineof scaling down approach newline newline