Hybrid Nuclear Energy Systems

Appendix D: Gas reactors

Earlier Helium Plants

Table D.1

Helium reactors.¹

Name	Dragon	AVR	HTTR	HTR	Beach bottom	THTR	Fort St. Vrain
Origin	United Kingdom	Germany	Japan	China	United States	Germany	United States
Date	1964–75	1967–88	1998 to the present	2000 to the present	1966–74	1985–91	1976–89
Type	Graphite block	Graphite pebble bed	Graphite block	Graphite pebble-bed	Graphite block	Graphite pebble bed	Graphite Block
Temperature	700°C	> 900°C	~ 950°C	~ 950°C	~ 700°C	~ 750°C	~ 700°C
Output    Thermal    Electric	20 MW(t)	46 MW(t)	30 MW(t)	10 MW(t)	115 MW(t)~72 MW(e)	750 MW(t)~300 MW(e)	842 MW(t)~330 MW(e)
Power generation	—	—	—	—	Steam generator	Steam generator	Steam generator
Remarks	Test reactor	Test reactor	Test reactor	Test reactor	Limited commercial success	Limited commercial success	Commercial failure ...