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Texas Tech University submitted a request for a product line of neutrongenerators that is available through Thermo Fisher Scientific capable ofproducing 14$\unicode{x2013}$MeV neutrons, specifically the P385 model thatgenerates approximately 3x$10^{ 8}$ n/s as an isotropic source. To comply withthe regulations set by the United States Nuclear Regulatory Commission, Stateof Texas Radiation, and Texas Tech radiation committee, adequate shielding isnecessary to ensure that the radiation dose rates outside the walls of thecontainment building are below the prescribed levels. Typically, the neutronsource needs to be shielded such that the radiation dose rate outside of thecontainment building is less than 0.25 mRem/hr (500mrem/2000 hour work-year).To address this requirement, we investigate the effectiveness of boronatedconcrete, boronated water, and light water shielding materials and theirapplicability to three neutron sources. We present our findings on theradiation shielding design and calculations for three neutron sources situatedinside shielding layers. Our modeling utilized the Monte Carlon$\unicode{x2013}$Particle transport codes (MCNP6.2) to simulate neutronattenuation of the shielding. The simulation results reveal that a light watershielding can sufficiently reduce the dose rate for an individual located asclose as two meters from the source. Therefore, this shield design caneffectively decrease the radiation dose below the maximum recommended limit.

Simulating Radiation Shielding Effectiveness for a  10$\unicode{x2013}$mCi Californium Source, 2.45$\unicode{x2013}$MeV Neutron  Source, and a Thermofisher P385 Neutron Generator