Investigations on startup instabilities and power ramping procedures for natural circulation boiling systems

Abstract

The thesis contains studies on startup instabilities and methods of power ramping in natural circulation boiling water systems Numerical models of a test facility and its prototype have been developed using RELAP5 code Startup transients in both single and double channel systems have been analyzed and their structural nature has also been determined Numerical simulations on power ramping have been performed and suitable startup procedures for the boiling systems have been evolved Experimenta