A three-dimensional simulation code has been developed for a Boiling Water Reactor (BWR) to perform two missions: realistic simulation of the phenomena induced in in-vessel core melt progression and evaluation of the composition and condition of molten materials/debris. The current stage of the code development focuses on simulation of the core melt progression from increase in cladding temperature to molten materials relocation, in order to decrease the computational uncertainties. To simulate the core melt progression more realistically, the code has several features: (i) a multi-phase, multi-component and multi-velocity-field, (ii) a three-dimensional geometrical configuration of complicated internal components in the core and lower plenum zones in a reactor pressure vessel of BWR, and detailed modelling of (iii) multiple core materials melt and chemical interactions, (iv) a candling phenomenon and (v) melt blockage in narrow zones. Subsequently to the previous qualitative validation of these physical models, more detailed validation was conducted in the present study for the CORA-BWR experimental series. In the validation, the code has semi-quantitatively simulated the temperature escalation and maximum temperature, the melt progression, the post-test configuration of relocated materials and the hydrogen generation of CORA-16 as the reference case first. Furthermore, the CORA-18, CORA-28 and CORA-33 have been evaluated in terms of the effects of scale (18 versus 48 fuel-rod mockup), pre-oxidation and wet/dry core condition. Additionally, through the CORA-16 and -18 validation, the code showed the capability for predicting the post-test configuration of relocated materials visually by comparing the photos.