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The development of the High-temperature Gas-cooled Reactor (HTGR) in Germany started with the 15 MWe AVR pebble-bed reactor plant in Juelich.
The Arbeitsgemeinschaft Versuchsreaktor AVR GmbH (Joint Working Group Experimental Reactor of 15 city utilities throughout West Germany) ordered the plant in 1959, construction began in 1961 by a consortium of BBC and Krupp, and first criticality was achieved in 1966. The reactor operated very successfully from 1967 to 1988, and was during this long period the mass test bed for all development steps of pebble fuel elements. Operation, fuel testing, and many reactor experiments were conducted in co-operation with the neighbouring Nuclear Research Facility, KFA, later renamed Research Centre Juelich, FZJ.
Temperatures in the AVR were extraordinarily high. Some fuel types failed under these conditions, but most of them showed at high burn-ups - ~ 170 MWd/kg for fuel pebbles, and ~ 700 MWd/kg for feed particles - and fuel temperatures of & 1350 degrees C excellent fission product retention.
The AVR results are the confidence base for the later modular HTGR concept that in the present search for better reactors is holding a prominent position.
The library describes construction and design of the AVR, as well as operation, experiments and modelling carried out over a period of 21 years.
This package contains an archival compact library with 160 reports.
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Keywords: experiments, high-temp gas-cooled reactor, pebble bed reactors, power plants, reactor dynamics, uranium fuels.