Resources Contact Us Home
Moderator rod containing burnable poison and fuel assembly utilizing same

Image Number 17 for United States Patent #5416813.

A moderator rod provided with a burnable poison and disposed in a fuel assembly of a reactor core comprises an outer tube, an inner tube disposed in the outer tube, the outer and inner tubes constituting a double tube structure between which an annular section is formed, and a burnable poison charged in said annular section. A containing amount of the burnable poison per unit area of the annular section is distributed at least one of peripheral direction and axial direction of the double tube structure of the inner and outer tubes. A fuel assembly of a nuclear reactor comprises an upper tie plate, a lower tie plate, a number of fuel rods supported at their upper ends by the upper tie plate and at their lower ends by the lower tie plate and filled up in their inner spaces with a plurality of fuel pellets, at least one of moderator rods containing burnable poison in various states and a channel box. The moderator has an outer tube and an inner tube disposed coaxially in the outer tube. An area of a metal, ceramics or thermet containing the burnable poison is formed at a portion except for portions having axial length corresponding to 1/24 to 1/12 length of the fuel effective length from the upper and lower ends thereof.

  Recently Added Patents
Antenna tuning on an impedance trajectory
Satellite fleet deployment
Zoom lens
Digital broadcast receiver and method for processing caption thereof
Optimization of packaging sizes
Apparatus for transmitting and receiving data in a wireless communication system and method thereof
Organic dual-gate memory and method for producing same
  Randomly Featured Patents
Method and apparatus for cleaning fine waste material mixed with oil and water
Image forming apparatus having a management unit and a shared processing unit, information processing method using the image forming apparatus, and image forming system having the image formin
Self-supported water sweeper
Release tag compounds producing ketone signal groups
Subscription television converter
Drainage method and strap draining materials therefor
Anchoring plate for dental posts
Method and means for coupling shafts
Safe dialdehydes useful as decontaminants, fixatives, preservatives and embalming agents
Device access based on centralized authentication