The MAMBA code simulates deposition of corrosion products on fuel pins in PWRs, chemical kinetics and transport inside the porous deposited layer of corrosion products (CRUD) and the effect of the deposits on thermal transport through conduction, convection and boiling. Although the code is currently optimized for simulating CRUD in PWRs in the context of CIPS/CILC, the chemical kinetics and transport capabilities can be applied to other problems captured by the same generic physics and chemistry.