## The Linear Reactivity Model for Nuclear Fuel ManagementThe Linear Reactivity Model (LRM) is a simple nuclear fuel management model that comes with a diskette containing three programs. Consisting of a collection of algorithms and methods, the LRM describes complex core behavior, but it is simpler than the complex programs developed for design calculations. This makes the LRM particularly useful as a teaching tool to explain the basic principles of nuclear fuel management. The LRM mainly focuses on the pressurized water reactor, but it is also directly applicable to the boiling water reactor. Application of the LRM to the CANDU reactor is also covered. |

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### Contents

Introduction | 1 |

NonsteadyState Applications | 42 |

Unequal Power Sharing | 69 |

Copyright | |

8 other sections not shown

### Common terms and phrases

adjusted analysis Appendix applications approximation assembly power average axial boiling water reactor BRICC burnable poison burnup cycle burnup step calculations CANDU Chapter coastdown coefficient computed control poison core power cross sections cycle burnup cycle length cycle-average discharge burnup effect Energy EOC Reactivity equal power sharing equation estimate fissile fission products flux four-batch fraction fresh fuel fuel assembly fuel batch Fuel Cycle fuel discharge burnup fuel management function of burnup heavy metal hence J. D. Lewins lattice leakage reactivity Light Water Reactors linear reactivity model loading patterns M. J. Driscoll mass MASS,kg MWd/kg natural uranium neutron balance nodal node Note Nucl Nuclear Engineering number of assemblies Optimization parameters perturbation PHWR power peaking Pressurized Water Reactors radial leakage reactivity balance refueling relation reload batch reload enrichment samarium startup Table three-batch core uranium utilization