The very high temperature reactor (VHTR) system behavior should be predicted during normal operating conditions and postulated accident conditions.
A shape of flattened drop is postulated, a condition of equilibrium of drop formulated, a model of blowing up of the bag proposed and the respective definition of critical Weber number introduced.
This coincidence is opposite to the postulated lowstand conditions that are essential in the 'weathering' scenario11 and the model can be discounted as a potential explanation.
Under some postulated accidental conditions, the secondary loop of the reactor needs to release its pressure for consequent system action.
The fuel specifications place limits on key attributes to minimize fuel particle failure under irradiation and postulated accident conditions.
The canister with bolting flange needs to maintain its seamless and structural integrity under normal operation and postulated accident conditions.
It covers important results arising from the development and an assessment of the reliability of the seal at the end of its design life, under postulated accidental conditions.
The verification of computational tools able to simulate the plant behaviour under postulated accidental conditions by code-to-code comparison was identified as a key point to ensure reactor safety.
It is permissible to design for strain limits in excess of yield strain in some of these safety-related structures, systems, and components during the Safe Shutdown Earthquake and under the postulated concurrent conditions, provided that the necessary safety functions are maintained.
Based on the analysis presented, four regimes of fixed-bed reactor operation are postulated and conditions are stated to identify the regime in which a given system would operate.
