Fig 2 - uploaded by Carlo Fiorina
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XY-cut view of the KIWI-B-4E reactor in OpenMC with the control drums oriented at 0° (shutdown orientation).
Contexts in source publication
Context 1
... deterministic methods. In addition, the small size of the core allows for full-core simulations doi.org/10.13182/T128-42091 with reasonable computational resources. In this work, a full core model has been developed using the Monte Carlo code OpenMC [11] and the ENDF/B-VII.1 nuclear data library. An XY-cut view of the OpenMC model is reported in Fig. ...
Context 2
... mentioned before, the core experienced high-temperature gradients during operation, thus introducing strong spatial reactivity effects, such as Doppler broadening, coolant void/moderating effects, or mechanical deformations. Second, several fuel elements of the core are cut by the peripheral graphite reflector as seen in Figure 2, which is not accurate. According to Ref. [3], the peripheral elements have been manufactured with an irregular shape to fill the space between the core and the reflector. ...
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Citations
... This study follows and extends the work done in Ref. Guilbaud and Fiorina (2023) from a fuel assembly to the entire KIWI-B-4E core. The paper focuses on an in-depth study and preliminary comparison with experimental data of the KIWI-B-4E full core using the open-source Monte Carlo code OpenMC and the multi-physics code GeN-Foam. ...
Nuclear Thermal Propulsion systems are one of the technologies to unlock interplanetary travel in the solar system and there is currently an increasing demand for accurately simulating such systems. The present paper investigates the KIWI-B-4E reactor, the first prototype of the NERVA program that achieved a restart at full power in 1964. To simulate this reactor, we propose the use of the OpenMC Monte Carlo code and the GeN-Foam multi-physics code to model full-core neutronics and thermal-hydraulics. The results mostly show a good agreement with the available experimental data, although uncertainties on key design parameters do not allow for a detailed neutronics validation.
