On 28 October 1981 the Federal government mandated an upgrade , raising the output of the planned power plant from 900 to 1,000 MW . Between 17 and 25 September 1985 , three different reactor types were more closely considered , all three of them variously configured water cooled reactors : Two years later , in 1987 , authorization was given for construction using an air cooled device , although the option of adding cooling towers had to remain open . Finally all the prerequisites were put in place for a comprehensive Emergency Plan , having regard to the Basel region 's seismic record . The next stage , which could no longer be deferred , involved selecting a supplier for the reactor . That stage would never be completed , however , because a contract for a reactor was never signed . In 1988 the project was dropped on economic grounds
seismic record
1356 Basel earthquake
Kaiseraugst Nuclear Power Plant