CALCULATION UNCERTAINTIES IN SPENT FUEL INVENTORY DETERMINATION

Authors

  • Tomas Czakoj Czech Technical University in Prague, FNSPE, DNR, V Holesovickach 2, 18000 Prague, Czech Republic
  • Jan Frybort Czech Technical University in Prague, FNSPE, DNR, V Holesovickach 2, 18000 Prague, Czech Republic
  • Martin Lovecky SKODA JS a.s., Orlik 266/15, 31600 Bolevec, Plzen, Czech Republic

DOI:

https://doi.org/10.14311/APP.2018.14.0014

Keywords:

uncertainties, nuclear, fuel, calculation, depletion

Abstract

In the depletion calculation of the nuclear fuel, the uncertainty is of utmost importance, as it affects the uncertainty of the subsequent calculation, when the calculated composition is used. The calculations are even more important when they are safety related, e. g., when determining the reactivity or emissions of radioactivity to the environment. This work covers the depletion model of Gd-2M+ fuel which was developed in ORIGEN-ARP/TRITON calculation sequences, both being parts of a SCALE 6.2.1 package. The uncertainties of the respective calculation model were determined by comparison with experimental data for both calculation sequences. The effects of operational and manufacturing uncertainties on concentration of the most important nuclides using TRITON depletion model of Gd-2M+ fuel were determined. The effect of respective uncertainties manifested in changes of composition on the multiplication factor using Monte-Carlo sequence KENO-VI were also specified.

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Published

2018-05-17

Issue

Vol. 14 (2018): ŠIMÁNĚ 2017

Section

Articles

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