Constitution of the Consortium of German Energy Suppliers for the Planning of the Construction of an Operational Reactor (AVR) as a non-profit organisation	20.11.1956
Order for construction to BBC / Krupp	25.04.1957
Constitution of the Experimental Reactor Consortium (AVR) as a company	03.02.1959
Order for the erection of the plant to the BBC / Krupp consortium (later called the Hochtemperatur-Reaktorbau-GmbH [High Temperature Reactor Company])	13.09.1959
Authorisation for the building project	21.12.1959
Groundbreaking ceremony	15.10.1960
Foundation stone laying	09.11.1961
First critical mass	26.08.1966
First power input to the national grid	17.12.1967
Handover to the operating company	28.05.1969
Increase of the refrigerant gas temperature from 850 °C to 950 °C	27.02.1974
Shut-down of power operation	31.12.1988
Period of operation	21 Jahre
Authorisation for safe entombment	09.03.1994

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