### Abstract

values from 77 energy groups were condensed to a single value by preserving overall isotope production rate from fission. Unit cell investigations were performed with a modified version of the SERPENT Monte Carlo particle transport code. The results indicate that the neutronics and radiotoxicity implications of yield energy dependence is likely to be negligible in most reactor designs.

Original language | English |
---|---|

Title of host publication | International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019 |

Publisher | American Nuclear Society ANS |

Pages | 710-718 |

Number of pages | 9 |

ISBN (Print) | 978-0-89448-769-9 |

Publication status | Published - Aug 2019 |

MoE publication type | A4 Article in a conference publication |

Event | International Conference on Mathematics and Computational Methods applied to Nuclear Science and Engineering - Portland, United States Duration: 25 Aug 2019 → 29 Aug 2019 |

### Conference

Conference | International Conference on Mathematics and Computational Methods applied to Nuclear Science and Engineering |
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Country | United States |

City | Portland |

Period | 25/08/19 → 29/08/19 |

### Fingerprint

### Keywords

- fission yield
- GEF
- RBWR
- neutronics
- radiotoxicity

### Cite this

*International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019*(pp. 710-718). American Nuclear Society ANS.

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*International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019.*American Nuclear Society ANS, pp. 710-718, International Conference on Mathematics and Computational Methods applied to Nuclear Science and Engineering, Portland, United States, 25/08/19.

**Energy-dependent fission yields in advanced reactors.** / Kunchev, Toni; Shwageraus, Eugene; Leppänen, Jaakko.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Energy-dependent fission yields in advanced reactors

AU - Kunchev, Toni

AU - Shwageraus, Eugene

AU - Leppänen, Jaakko

N1 - CD-ROM

PY - 2019/8

Y1 - 2019/8

N2 - Fission product yields vary over incident neutron energies and between the different fissionable nuclides. An improved representation of this energy dependence could affect the assessment of advanced reactor designs which utilise a fast neutron spectrum. The present work involves the implementation of energy-weighted averaging of fission yields in various reactor unit cell models to determine its effect on neutronics, spent fuel decay power and radiotoxicity. The energy dependence is captured through the GEF code, which has enabled the estimation of fission product yields at any incident energy point. Yieldvalues from 77 energy groups were condensed to a single value by preserving overall isotope production rate from fission. Unit cell investigations were performed with a modified version of the SERPENT Monte Carlo particle transport code. The results indicate that the neutronics and radiotoxicity implications of yield energy dependence is likely to be negligible in most reactor designs.

AB - Fission product yields vary over incident neutron energies and between the different fissionable nuclides. An improved representation of this energy dependence could affect the assessment of advanced reactor designs which utilise a fast neutron spectrum. The present work involves the implementation of energy-weighted averaging of fission yields in various reactor unit cell models to determine its effect on neutronics, spent fuel decay power and radiotoxicity. The energy dependence is captured through the GEF code, which has enabled the estimation of fission product yields at any incident energy point. Yieldvalues from 77 energy groups were condensed to a single value by preserving overall isotope production rate from fission. Unit cell investigations were performed with a modified version of the SERPENT Monte Carlo particle transport code. The results indicate that the neutronics and radiotoxicity implications of yield energy dependence is likely to be negligible in most reactor designs.

KW - fission yield

KW - GEF

KW - RBWR

KW - neutronics

KW - radiotoxicity

UR - http://www.ans.org/store/item-700432/

UR - http://www.scopus.com/inward/record.url?scp=85075364948&partnerID=8YFLogxK

M3 - Conference article in proceedings

SN - 978-0-89448-769-9

SP - 710

EP - 718

BT - International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019

PB - American Nuclear Society ANS

ER -