Fig. 9. Simulated tritiated water vapor (³HHO_g) concentrations in units of Bq kg^–1 of water in the gas phase at time = 40 yr for (a) source temperature (T_S) 45°C simulation [maximum horizontal extent (MHE) = 32 m and a maximum vertical extent (MVE) = 24 m], (b) source-pressure difference above ambient (P_S) 500 Pa simulation (MHE = 40 m and MVE = 21 m), (c) T_S 45°C and P_S 500 Pa simulation (MHE = 42 m and MVE = 28 m), and (d) anisotropic (1:100), T_S 45°C, and P_S 500 Pa simulation (MHE = 121 m and MVE = 31 m). The MHE and MVE values are based on a simulated ³HHO_g concentration of 1 Bq kg^–1.