The CCP-NTH Code Repository
CCP-NTH supports a series of community codes that are developed, maintained, or actively used across the UK nuclear thermal hydraulics community.
On this page
Overview
The CCP-NTH Code Repository brings together community codes relevant to nuclear thermal hydraulics, including software developed within CCP-NTH and tools widely used by the UK NTH community.
This page provides a central entry point for code access, information, and community contribution.
Community Codes

CHAPSim2
CHAPSim2 is an open-source high-fidelity DNS solver for incompressible turbulent flow and heat transfer,
developed within CCP-NTH and maintained through CoSeC.
developed within CCP-NTH and maintained through CoSeC.
Subchannel Modelling (Code_Saturne / OpenFOAM)


Subchannel modelling capability hase been developed for PWR and HTGR within open-source CFD frameworks, including Code_Saturne and OpenFOAM, to support subchannel-scale thermal hydraulics analysis and method development.
Contribution
We encourage members of the nuclear thermal hydraulics community to contribute to the CCP-NTH Code Repository.
To get involved, please create a GitHub account and send us your GitHub username through the Contact page. This helps us coordinate access, contributions, and future community development.