### Abstract

Continuous-energy Monte Carlo reactor physics code
Serpent 2 was used to model the steady state conditions
measured in V-1000 zero-power critical facility at
Kurchatov Institute, Moscow, in 1990-1992. The Serpent 2
results were compared to the steady state power
measurements of the test facility with all control rods
withdrawn from the core. Serpent 2 was used to generate
group constants for reactor dynamics code HEXTRAN and a
HEXTRAN calculation of the test facility was performed.
The original measurements were carried out by inserting
partial-length fuel rods into the core. The Serpent 2
calculation allowed direct calculation of the relative
powers of these rods instead of relying on pin power
reconstruction. The properties of the radial reflector
and the gaps between the radial reflector and the fuel
assemblies of the test facility were examined with
additional detail. The relative power distribution of the
zero-power steady state was found to be very sensitive to
the properties of the radial reflector. Nodal diffusion
calculations carried out previously by several different
groups in 2003 found a significant power tilt in the
core.
This was reproduced in the Monte Carlo calculation.
However, the reflector gaps produced another power tilt
in addition to the previously known one.

Original language | English |
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Title of host publication | 26th Symposium of AER on VVER Reactor Physics and Reactor Safety (2016, Helsinki, Finland) |

Subtitle of host publication | Proceedings |

Publisher | Hungarian Academy of Sciences Centre for Energy Research |

Pages | 485-437 |

ISBN (Print) | 978-963-7351-26-6, 978-963-7351-27-3 |

Publication status | Published - 2016 |

MoE publication type | Not Eligible |

Event | 26th Symposium of AER on VVER Reactor Physics and Reactor Safety - Helsinki, Finland Duration: 10 Oct 2016 → 14 Oct 2016 |

### Conference

Conference | 26th Symposium of AER on VVER Reactor Physics and Reactor Safety |
---|---|

Country | Finland |

City | Helsinki |

Period | 10/10/16 → 14/10/16 |

### Keywords

- Monte Carlo
- Serpent2
- nodal diffusion
- HEXTRAN
- V-1000
- measurements

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## Cite this

Sahlberg, V. (2016). Recalculating the steady state conditions of the V-1000 zero-power facility at Kurchatov institute using Monte Carlo and nodal diffusion. In

*26th Symposium of AER on VVER Reactor Physics and Reactor Safety (2016, Helsinki, Finland) : Proceedings*(pp. 485-437). Hungarian Academy of Sciences Centre for Energy Research.