Trendanalys av rapporterade störningar vid de svenska
Analysis of trends in reported safety-related events at
Swedish nuclear power plants
This degree project was conducted at the Swedish Radiation Safety Authority (SSM)
as part of the bachelors program in Nuclear Engineering at Uppsala University during
the spring of 2011.
The Swedish Radiation Safety Authority (SSM) has developed a Windows based
database called “ASKEN” during later years. In this database more than 12 000 event
reports are stored sorted in three categories, category 1, 2 and 3. The database
contains events from the start of Oskarshamn 1 in 1972 till present time.
All nuclear power plants in Sweden are obliged to report any deficiency in their
barriers and/or the defense in depth in obedience to SSMFS 2008:1.
When a failure is detected or there is reasonable suspicion of a deficiency, the event
report should be classified as a deficiency of category -1, 2 or 3 .
The event reports are logged and archived in the register of SSM. The SSM task force
Analys av Störningar på elproducerande Kärnkraftverk (the ASK-group), evaluates all
incoming event reports and categorizes them according to established criteria.
The aim of the project is to study and analyze the event reports in the database and
identity interesting observations and trends which should be investigated more
thoroughly by deeper analysis to establish any positive or negative trends of reported
2011. , 30 p.
2011-05-26, sal 2001, Ångströmlaboratoriet Lägerhyddsvägen 1 Polacksbacken, Uppsala, 15:00 (Swedish)