Table 1 | Dosage to give 25 and 75 % decrease, 107 Rads | Particles dosages each equivalent to 107 Rads | |||||||||||
Material | Tensile strenght | Elongation | Elastic modulus | Shear strenght | Impact strenght |
Thermal neutrons, 1017 n/cm2 |
Fast neutrons (> 1MeV), 1015 n/cm2 |
||||||
-25% | -75% | -25% | -75% | -25% | -75% | -25% | -75% | -25% | -75% | ||||
Bakelite | 2.2 | 40 | 2.2 | 40 | 25 | > 300 | 2.2 | 40 | 2.2 | 40 | 5.0 | 4.6 | |
Polyethylene | 800 | > 1000 | 9.0 | 37 | 130a | 220a | 11a | 94a | 9.0 | 37 | 2.7 | 2.2 | |
Polystyrene | > 600 | > 600 | > 600 | > 600 | > 600 | > 600 | > 600 | > 600 | > 600 | > 600 | 4.5 | 3.5 | |
PVC | 180 | 370 | 12 | 83 | 0.068 | 5.8 |
Table 2 | Gamma activity of irradiated RPC samples | |
Sample | Weight (mg) | Activity (Bq) |
PVC + Polyethylene | 60 |
24Na |
Al + polyestere | 25 |
24Na |
Foam (PVC) | 60 |
24Na |
Al+PVC+Polistyrene | 160 |
82Br |
Bakelite + PVC | 390 |
24Na |
Al+ Foam(PVC)+Fiberglas Polyestere | 330 |
24Na |
Bakelite + Graphite | 350 |
24Na |
Al | 10 |
24Na |
Polystyrene | 20 |
82Br |
Linseed Oil | 1000 |
82Br |