When nuclear power plants (NPPs) are in a state of failure, they may release radioactive material into the environment. The safety NPPs must thus be maintained at high standard. Online monitoring and fault detection diagnosis (FDD) important helping NPP operators understand system provide online guidance timely manner. Here, to mitigate shortcomings process NPPs, five-level threshold, qualitati...

The core conversion studies of the Ghana Research Reactor Core started in 2006 and with the objective of designing an LEU core with similar operational capabilities as the original HEU core and with acceptable safety margins under both normal and accident conditions. Steadystate studies for converting the Ghana MNSR facility from HEU to LEU core have been performed using the PLTEMP/ANL V4.1 cod...

In this paper, Computational Fluid Dynamics technique and numerical analysis is used to investigate the rocket thrust chamber cooling characteristics. The scope of the investigation involves the study of effect of aspect ratio (height/width) on the heat transfer characteristics of coolant channel. Steady state pressure based analysis of semi cryogenic thrust chamber regenerative cooling channel...

During loss-of-coolant (LOCA) accidents the primary reactor coolant system shall be maintained in a safe state so that the coolability of fuel rods was maintained and the emergency core cooling criteria must be met. These criteria were accepted originally for Western design reactors and the same criteria were applied in Hungary to the Paks NPP as well. However the WER type reactor has different...

IRSN has developed DRACCAR code in order to model loss of coolant accidents (LOCA) a light water nuclear reactor. The physics during hypothetical accident involves several phenomena such as heat and mass transfers, fluid dynamics, mechanics, chemistry. Even if simulation requires modeling these conjugated processes, it is important validate them separately first—for example, dynamics calculatio...

This study develops a Zero-Inflated Negative Binomial (ZINB) regression model to evaluate the factors influencing the loss of human life in shipping accidents using ten years’ ship accident data in the South China Sea. The ZINB regression model results show that the expected loss of human life is higher for collision, fire/explosion, contact, grounding, hull damage, machinery damage/failure and...

A full scale SI engine has been imported in to the CFD tool to analyse the temperature distribution of coolant throughout the cooling channels. The segregated approach solver has been adopted to solve the energy equations along with the RANS two layer turbulence model to find out accordance with the available theoretical and published results. The input values are collected from complete vehicl...

Liquid gas two phase flow is a common occurrence in various industrial applications. For nuclear fusion applications with Li based breeder, existence of may lead to critical issues including decreased tritium breeding ratio, generation hot spots and improper shielding. Additionally, very large density ratio liquid metal mandates relevant experiments towards development validation software tools...

One of the most important environmental and safety concerns in nuclear fusion plants is confinement radioactive substances into reactor buildings during both normal operations accidental conditions. For this reason, hydrogen build-up subsequent ignition must be avoided, since pressure energy generated may threaten integrity structures, causing dispersion toxic products toward public environment...

INTRODUCTION In pebble bed reactors (PBRs), fuel pebbles containing TRISO particles continuously circulate within the core during operation, while the coolant fluid, either helium gas (in Pebble Bed Gas-cooled Reactors) or molten flibe salt (in Pebble Bed-Advanced High Temperature Reactors), continuously passes through the pebbles to transfer the heat generated by fission reactions out of the c...