Conference paper Open Access

# A COMPARISON BETWEEN TIME DOMAIN AND FREQUENCY DOMAIN CALCULATIONS OF STATIONARY NEUTRON FLUCTUATIONS

Viebach M., Lange C., Kliem S., Demazière C., Rohde U., Hennig D. and Hurtado A.

### Citation Style Language JSON Export

{
"publisher": "Zenodo",
"DOI": "10.5281/zenodo.3567604",
"title": "A COMPARISON BETWEEN TIME DOMAIN AND FREQUENCY DOMAIN CALCULATIONS OF STATIONARY NEUTRON FLUCTUATIONS",
"issued": {
"date-parts": [
[
2019,
8,
25
]
]
},
"abstract": "<p>Unexplained neutron flux fluctuation patterns observed in some reactors were recently<br>\ninvestigated by various European institutions. The time-domain code DYN3D is one of<br>\nthe tools used for simulating these fluctuations. Though, the applicability of time-domain<br>\ncodes for modelling small stationary fluctuations remains a discussed question.<br>\nAiming at a confirmation that these codes may be applied for neutron noise calculations,<br>\ntwo special cases of neutron flux oscillations have been simulated with DYN3D and with<br>\nCORE SIM, the latter one being validated for the context here. The comparison between<br>\nthe results of these two codes is the subject of this paper.<br>\nThis study demonstrates that time- and frequency-dependent calculations can give qualitatively<br>\nequivalent results but substantial quantitative deviations may occur. Nevertheless,<br>\nDYN3D may be considered as qualified for neutron-noise calculations as the deviations<br>\nare smaller than 20 %. The optimization of the DYN3D setup is a matter of future research.</p>",
"author": [
{
"family": "Viebach M., Lange C., Kliem S., Demazi\u00e8re C., Rohde U., Hennig D. and Hurtado A."
}
],
"id": "3567604",
"event-place": "Portland, Oregon, USA",
"type": "paper-conference",
"event": "Mathematics & Computational Methods Applied to Nuclear Science & Engineering (M&C 2019)"
}
76
53
views