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Table 1
Description of environmental source terms for German NPP's.
| Source term name | FKI | FKF | FKA |
| Reactor type | PWR | PWR | PWR |
| Initiating event | Break on main circulation line (10 cm2) | Break on main circulation line (10 cm2) | Break of the steam generator (SG) boiler tube (6 cm2) |
| Description of scenario | Core damaged; CONT not damaged; Depressurization of CONT by filtered venting. |
Core damaged; CONT not damaged; Depressurization of CONT by unfiltered venting. |
Core damaged; CONT damaged. |
| Begin of release (after end of chain reaction) | 12.4 h (venting after 57 h; height: ∼150 m) | 12.4 h (venting after 57 h height: ∼150 m) | 21 h (height: ∼30 m) |
| Duration of release | 86 h (40 h through venting) | 86 h (40 h through venting) | 50 h (through damaged CONT)b |
| Total release | |||
| 131I | 3 PBq | 20 PBq | 300 PBq |
| 137Cs | 0.0003 PBq | 0.3 PBq | 30 PBq |
| 133Xe | 5 000 PBq | 5 000 PBq | 2 000 PBq |
| Radiological equivalent of 131I activitya | 2.8 PBq | 34 PBq | 1 600 PBq |
| INES category | 5 | 6 | 7 |
a
Radiological equivalent of the 131I has been calculated according to INES (2009) methodology.
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