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Special Section on Research Center Řež: Nuclear-Engineering Activities in 2018

Criticality Calculations and Basic Sensitivity/Uncertainty Investigation of LR-0 Benchmark Core

[+] Author and Article Information
Tomáš Czakoj

Research Centre Rez,
Hlavní 130,
Husinec-Rež 250 68, Czech Republic
e-mail: tomas.czakoj@cvrez.cz

Evžen Losa

Research Centre Rez,
Hlavní 130,
Husinec-Rež 250 68, Czech Republic
e-mail: evzen.losa@cvrez.cz

Manuscript received June 20, 2018; final manuscript received October 3, 2018; published online April 16, 2019. Assoc. Editor: Martin Schulc.

ASME J of Nuclear Rad Sci 5(3), 030903 (Apr 16, 2019) (5 pages) Paper No: NERS-18-1041; doi: 10.1115/1.4041692 History: Received June 20, 2018; Revised October 03, 2018

Three-dimensional Monte Carlo code KENO-VI of SCALE-6.2.2 code system was applied for criticality calculation of the LR-0 reactor core. A central module placed in the center of the core was filled by graphite, lithium fluoride-beryllium fluoride (FLIBE), and lithium fluoride-sodium fluoride (FLINA) compounds. The multiplication factor was obtained for all cases using both ENDF/B-VII.0 and ENDF/B-VII.1 nuclear data libraries. Obtained results were compared with benchmark calculations in the MCNP6 using ENDF/B-VII.0 library. The results of KENO-VI calculations are found to be in good agreement with results obtained by the MCNP6. The discrepancies are typically within tens of pcm excluding the case with the FLINA filling. Sensitivities and uncertainties of the reference case with no filling were determined by a continuos-energy version of the TSUNAMI sequence of SCALE-6.2.2. The obtained uncertainty in multiplication factor due to the uncertainties in nuclear data is about 650 pcm with ENDF/B-VII.1.

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Copyright © 2019 by ASME
Topics: Uncertainty , Tsunamis
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Figures

Grahic Jump Location
Fig. 1

Photo of core in LR-0 reactor

Grahic Jump Location
Fig. 2

Scheme of benchmark core in LR-0 reactor in configuration with full graphite insertion (case 8)

Grahic Jump Location
Fig. 3

Various arrangements of central module [8]

Grahic Jump Location
Fig. 4

C/E −1 results in pcm, solid lines denote the 1σ uncertainty interval

Tables

Errata

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