In 2013, there were 34 reportable events in the Swiss nuclear power plants:
- 7 events at the two Beznau units,
- 7 at Gösgen,
- 7 at Leibstadt and
- 13 at Mühleberg.
During operation, there were no reactor scrams recorded.
On the INES scale, ranging from 0–7, ENSI rated all reportable events in nuclear power plants in 2013 as Level 0.