What question did this study set out to answer?

The aim is to develop a coupling framework for neutronic and thermal-hydraulic analysis of small modular reactors under various conditions.

April 3, 2026Nuclear Engineering and DesignOpen Access

Development and implementation of an external neutronic–thermal-hydraulic coupling framework for natural circulation SMR analysis

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Authors

JXJ. Vicente Xolocostli-MunguíaInstituto Nacional de Investigaciones Nucleares HSHeriberto Sánchez-MoraUniversidad Autónoma Metropolitana RPRaimon Pericas-CassalsUniversitat de Vic - Universitat Central de Catalunya

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Implication

This work demonstrates a new coupling methodology for analyzing natural circulation in small modular reactors, suggesting improved simulation efficiency.

Key Points

The aim is to develop a coupling framework for neutronic and thermal-hydraulic analysis of small modular reactors under various conditions.
Developed an iterative coupling scheme between AZTRAN and TLANESY codes.
Applied the methodology to a NuScale-like reactor under steady-state and transient conditions.
Monitored convergence criteria including Δ k eff and relative deviations.
Achieved convergence within defined thresholds, with Δ k eff < 1 × 10 −4.
Maintained steady-state deviations below 1.7% for critical thermal-hydraulic parameters.
Demonstrated consistent transient behavior related to neutronic and thermal-hydraulic feedback.

Cite This Study

Xolocostli-Munguía et al. (2026) studied this question.

synapsesocial.com/papers/69cf5f505a333a821460e682 https://doi.org/10.1016/j.nucengdes.2026.114916

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Implication

This work demonstrates a new coupling methodology for analyzing natural circulation in small modular reactors, suggesting improved simulation efficiency.

Development and implementation of an external neutronic–thermal-hydraulic coupling framework for natural circulation SMR analysis

Discussion

Member takes

Implication

Key Points

Cite This Study

Development and implementation of an external neutronic–thermal-hydraulic coupling framework for natural circulation SMR analysis

Discussion

Member takes

Implication

Key Points

Cite This Study

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