5901 23RD DR W ZAP ENERGY 2025-08-04

ZAP ENERGY ZRD-SPL-001 3. FUZE RADIATION SHIELDING PLAN For the FUZE device, no shielding barrier is relied upon to achieve dose limit goals for Zap employees and members of the public (currently both set at 100 mrem/year). Administrative controls(procedures,restricted access to the area surrounding the machine,restricted access to the lab, etc.)provide sufficient measures to minimize exposure and achieve ALARA goals. 3.1 Area Locations and Details The areas considered in the shielding design are labeled in Figure 6. The closest distances from the source to the location,which is 30 cm from any surface that the radiation penetrates, are listed in Table 4, along with the occupancy and the area classification of controlled areas or unrestricted area. 3.2 Source Assumptions for Dose Estimation The source is an isotropic line source of 2.5-MeV neutrons. The reference point of the FuZE device (nose cone tip)is 0.35 in North and 12.6 in West than the FuZE-Q reference point.For convenience the laboratory coordinate is kept the same, so the FUZE line source starts from(-1260, 0, -35) and ends at (-1260, 0, -15). No FUZE device is modeled in the simulation as the FUZE-Q simulations already demonstrated that the dose contribution from prompt gammas can be neglected. Zap estimated that the neutron production will be no more than 4 x 1012 neutrons in one year, which can be achieved by firing 4,000 plasma shoes with a yield of 109 neutrons per shot, or any other equivalent combination of yields and number of plasma shots. The annual neutron generation from FuZE is estimated to be 50 times less than FuZE-Q. 3.3 Dose Distribution The estimated doses for each considered location are listed in Table 4, and the 2D dose map is shown in Figure 13. The dose contribution from FuZE operations is far less than the dose limits for the shielding design. Among all the areas of consideration, the highest percentage dose contributions are 18% for the machine shop and I I% for the control room as the distances are closer to these highly occupied areas. Zap Energy Inc. Proprietary Information 17