Open Access
Table 1
19 transients selected for this SFR safety demonstration (SA: Severe Accident).
| Family | Description | Situation category | Scientific calculation tool |
|---|---|---|---|
| Loss of function supporting | General slowdown of the primary pumps | OS2 | CATHARE2 |
| General acceleration of the primary pumps | OS2 | CATHARE2 | |
| Seizure or shaft failure of one primary pump | OS3 | MATHYS | |
| Connection failure between a primary pump and diagrid | OS4 | MATHYS | |
| Unprotected general slowdown of the primary pumps | PS | MATHYS | |
| Defect of sub-assembly cooling | Partial blockage of a fissile sub-assembly | OS3 | MATHYS |
| Partial blockage of an absorbent sub-assembly | OS3 | MATHYS | |
| Progressive melting of a sub-assembly owing to a blockage | PS | SIMMER (SA) | |
| Defect of primary circuit cooling | One or several secondary pump trips | OS2 | CATHARE2 |
| Unintentional draining of secondary loops | OS3 | CATHARE2 | |
| Unintentional closure of isolation valve on secondary loops | OS4 | CATHARE2 | |
| Defect of secondary and tertiary circuits cooling | Station BlackOut shorter than 2 h | OS2 | CATHARE2 |
| Station BlackOut longer than 2 h | OS3 | CATHARE2 | |
| Generalized under-voltage shorter than 3 days | OS4 | MATHYS | |
| Unprotected Station BlackOut shorter than 2 h | OS4 | MATHYS | |
| Reactivity variation | Unintentional rising of a control rod | OS2 | Multiphysic Tool |
| Unintentional drop of a control rod | OS2 | Multiphysic Tool | |
| Unintentional automatic reactor shut-down | OS2 | MATHYS | |
| Unintentional fast reactor shut-down | OS2 | MATHYS |
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