Resources Contact Us Home
Method of establishing a nuclear reactor core fuel assembly loading pattern

Image Number 2 for United States Patent #6931090.

All possible loading patterns for a nuclear reactor core are searched and optimized for compliance with design constraints. The fuel inventory is divided into a few batches according to coarse levels of reactivity. A recursive enumeration process identifies patterns meeting selected core position constraints, which can be user modified to adjust the search space size. For the batch loading patterns satisfying the constraints, the batches are divided into several smaller batches. A sensitivity matrix linearizing the relationship between fuel assembly position and the depletion model is processed through mixed integer linear programming with branching and bounding to identify an optimal daughter loading pattern. The process is repeated through several levels of batch refinement and selection of optimal daughter patterns, including a level where burnable absorbers are assigned to feed assemblies, until the individual fuel assembly level is reached. The multiple optimal patterns remaining provide a range of solutions.

  Recently Added Patents
System and method for detecting crop rows in an agricultural field
Pattern generation method and pattern generation program
Method and apparatus for distributing promotional materials
Spacers for insulated glass units
Stroboscopic light source for a transmitter of a large scale metrology system
Method and system for detecting center pivot collision
Methods circuits apparatuses and systems for facilitating access to online content
  Randomly Featured Patents
Re-bar clamp
Foamable composition and process for making large cell size alkenyl aromatic polymer foam structure with 1,1-difluoroethane
Multi-mode control system for wind turbines
Image forming apparatus provided with a plurality of light signal emitting heads
Imaging apparatus using multiple regulators to decrease overall power consumption
Idling control system for an automatic transmission providing smooth starting off action
Optical sensor
PRO4989 polypeptides
Access needle well-suited for percutaneous implantation in a body lumen
Method and apparatus for depositing nonconductive material onto conductive filaments