Hydrogen, an efficient and clean energy carrier, holds promise for sustainable energy systems but requires robust safety measures. Addressing safety concerns is paramount for the commercial success of hydrogen energy due to factors such as its broad flammability range and low ignition energy. This article introduces a novel method for predicting hydrogen jet velocities crucial for risk assessments in hydrogen systems. The integral jet model calculates velocities directly from concentration data, offering a cost-effective solution for accurate velocity estimations. Experimental validation using helium and hydrogen jets, along with comparison to PIV and CFD simulations, demonstrates the method's effectiveness. Understanding hydrogen jet behavior during accidental releases is essential to mitigate risks in high-pressure hydrogen storage and transportation. Optical diagnostic techniques like Background Oriented Schlieren and Laser diagnostics are highlighted for their non-intrusive concentration measurement capabilities in turbulent flows. Overall, this study contributes valuable insights into enhancing safety standards and risk assessments in hydrogen-fueled energy systems.