### Abstract

Original language | American English |
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Pages | 145 |

Number of pages | 1 |

State | Published - 1 Dec 2004 |

Event | Abstracts of the Pacific Basin Nuclear Conference - Duration: 1 Dec 2004 → … |

### Conference

Conference | Abstracts of the Pacific Basin Nuclear Conference |
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Period | 1/12/04 → … |

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### Cite this

*BWR local peaking factor calculation using the linear reactivity model*. 145. Paper presented at Abstracts of the Pacific Basin Nuclear Conference, .

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**BWR local peaking factor calculation using the linear reactivity model.** / Alonso, Gustave; Del Valle, Edmundo; Delfïn, Arturo.

Research output: Contribution to conference › Paper

TY - CONF

T1 - BWR local peaking factor calculation using the linear reactivity model

AU - Alonso, Gustave

AU - Del Valle, Edmundo

AU - Delfïn, Arturo

PY - 2004/12/1

Y1 - 2004/12/1

N2 - In absence of burnable absorbers the reactivity produced by a BWR fuel assembly behaves in a linear manner from here its name. In particular for U-235 enrichments above 2 w/0 [2], it happens in that way. To obtain longer energy cycles is necessary to increase the U-235 enrichment in the fuel assembly along with the use of Gadolinium to avoid pin peaking factor that could damage the integrity of the BWR fuel assembly. Use of this burnable absorber penalizes the reactivity of the fuel assembly, however it disappears generally after its first cycle of operation. In this work, we proposed the use of a five-block mesh-centered finite difference scheme based on a nodal formulation as a way to obtain accurate predictions of local peaking factor using the linear reactivity model along with the penalization given by the use of gadolinium. With these ideas we constructed a computer program called RHOMC-B (Reactivity based High Order Multicycle analysis for BWRs), this program considers the use of a third order nodal formulation relating assembly power and reactivity, and it also incorporates the reactivity penalty given by the use of gadolinium as a fuel assembly burnable absorber.

AB - In absence of burnable absorbers the reactivity produced by a BWR fuel assembly behaves in a linear manner from here its name. In particular for U-235 enrichments above 2 w/0 [2], it happens in that way. To obtain longer energy cycles is necessary to increase the U-235 enrichment in the fuel assembly along with the use of Gadolinium to avoid pin peaking factor that could damage the integrity of the BWR fuel assembly. Use of this burnable absorber penalizes the reactivity of the fuel assembly, however it disappears generally after its first cycle of operation. In this work, we proposed the use of a five-block mesh-centered finite difference scheme based on a nodal formulation as a way to obtain accurate predictions of local peaking factor using the linear reactivity model along with the penalization given by the use of gadolinium. With these ideas we constructed a computer program called RHOMC-B (Reactivity based High Order Multicycle analysis for BWRs), this program considers the use of a third order nodal formulation relating assembly power and reactivity, and it also incorporates the reactivity penalty given by the use of gadolinium as a fuel assembly burnable absorber.

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M3 - Paper

SP - 145

ER -