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
Magnetic resonance imaging apparatus for use with radiotherapy
Methods and devices for multiple-mode radio frequency synthesizers
Memory access monitoring method and device
Vacuum switch and electrode assembly therefor
Reframing circuitry with virtual container drop and insert functionality to support circuit emulation protocols
Antibodies to non-functional P2X.sub.7 receptor
Input system including position-detecting device
  Randomly Featured Patents
Strap holding device
Television receiver disabling circuit
Focus adjusting device wherein effective focal length is derived by detecting low frequency changes in image signals
Hammer with an angle-adjustable head
Dynamic memory word line driver scheme
Voting booth
Rolling ball separator structure of a linear drive member
Nail holding attachment for a hammer
Evaporative fuel processing apparatus of internal combustion engine
Material fastening structure and method