| Front | HU equation-values |
| Back | HU = 1000*(u-uH20)/(uH20-uair)u = linear attenuation coefficientAir: -1000Water: 0Lung: -500Fat: -100Muscle: 40 |
| Tags |
| Text | Sealed source leak testing every {{c1::6 months}} for T1/2 > {{c1::30 days}}: contamination > {{c1::185 Bq}} requires source to be removed from service |
| Extra | 10CFR35 |
| Tags | Regs_Safety |
| Front | Barrier transmission factor (B) facts- adding B factors- tenth-value layers (TVL's)- First vs. later TVL's |
| Back | B factors are multiplicative (Btot = B1*B2*B3...)Number of tenth-value layers: n = -log10(B)TVL1 - first TVLTVLe - equilibrium TVLTVLe < TVL1 because scattering is more important than beam hardening in TVL1Barrier thickness: t = TVL1 + (n-1)TVLe |
| Tags | Shielding |