Category Archives: Fast Reactor Safety. (Nuclear science. and technology)

Fuel Failure Criteria

A typical fuel pin in a fast reactor could be a ceramic fuel bonded within a metal cladding. Several varieties are possible, the main ones being helium- bonded U02 (enriched with Pu02) in stainless-steel cladding; and sodium — bonded UC pellet in stainless-steel cladding. The oxide and carbide can be fabricated in different ways (pelleted or vibro-compacted) and the cladding […]

Read more

Effect of Bubbles on Heat Transfer

Bubbles within coolant channels may affect the heat transfer in two ways. If the bubbles are small and dispersed and spread evenly throughout the coolant, they have a homogeneous effect of macroscopically decreasing the density of the coolant. If the bubbles are larger, they may be considered individually as insulating a portion of the fuel pin either in a stationary […]

Read more

Wind Direction and Speed

The wind direction and speed can be varied by macroscopic and local conditions. All the parameters must be measured and monitored so that not only is a mean value known, but its variances and statistical uncertain­ties are known also. The main characteristics are: prevailing direction that is largely a macroscopic effect dependent on the site proximity to large mountain ranges […]

Read more

Fast Reactor Safety. (Nuclear science. and technology)

FAST REACTOR SAFETY JOHN GRAHAM Westinghouse Advanced Reactors Division Madison, Pennsylvania This book is a step along the arduous path of developing the technology of nuclear safety as a fully recognized discipline with quantitatively defined standards and an accepted methodology of analysis, design, and test inter­pretation. Completion of this task is needed to stabilize the nuclear power industry and eliminate […]

Read more

Burn-Up Effectsi

As the fuel burn-up proceeds, the fuel composition and the control effectiveness changes and thus the reactivity balance of the system alters. These changes are also feedback effects, although the time scale is very large. Because these changes are long-term, they have no immediate effect on stability and so they are generally omitted from transient calculations. They are, however, accounted […]

Read more
1 2 3 24