Estimate the thickness of a cylindrical concrete shield

Reference no: EM13269193

Sodium coolant with a specic activity of 0.05 Ci/cm3 passes through a long pipe 8 in. in diameter. By treating the pipe as a line source and ignoring attenuation in the sodium, estimate the thickness of a cylindrical concrete shield, wrapped around the pipe, that reduces the dose rate to 2.5 mrem/hr. (Note: 24Na has a half-life of 15 hours and emits two gamma-rays per disintegration of energies 2.75 and 1.37 MeV, respectively).

Reference no: EM13269193

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