To make an initial assessment of the risks of hydrogen in the Dutch distribution network, a quantitative risk assessment (QRA) has been conducted. It compares the risk between the current natural gas distribution system and the future hydrogen distribution system. The total risk in the analysis consists of the risk arising from leaks in the distribution network and the risk arising from leaks in the house itself. The model simplifies the built environment in the Netherlands in order to control the number of variables and associated calculations. For this initial version, detached houses were chosen for validating the model. In addition, semi-detached houses were also used in the case study of a representative sample neighborhood. The distribution network is simplified by using a limited number of materials, pressures, and diameters. An important input parameter of the model is the failure frequency of the different components. The failure frequencies for the distribution network were determined based on ... : Dit project is medegefinancierd door TKI Nieuw Gas | Topsector Energie uit de PPS-toeslag onder referentienummer TKI2022-HyDelta. ...