STAR portfolio

1 January 2000

STAR portfolio* Assumes four tonnes of oil equivalent per capita per year primary energy = 5.3kWt-year per person per year.

LFR	SSTAR	STAR-LM	STAR-H2
Power, MWe (MWt)	20 (45)	181 (400)	N/A (400)
Deployment *	Electricity for a remote town of ~8600	Electricity for a city of ~155000	All primary energy and potable water
			for a city of ~25000
Core outlet temperature, C	566	578	793
Coolant	Pb	Pb	Pb
Power density, W/cm3	69	44	44
Average discharge burnup, MWd/kgHM	73	83	83
Fuel	TRUN	TRUN	TRUN
	Enriched to N-15	Enriched to N15	Enriched to N15
Enrichment, %	1.7/3.3/16.7/18.4/20.1 TRU	13.3/18.2/21.3 TRU	13.14/18.4/18.4 TRU
Cladding	Si-enhanced ferritic/martensitic SST	Si-enhanced
ferritic-martensitic SST	SiC/SiC-composite
Fuel/coolant volume fractions	0.54/0.28	0.21/0.66	0.21/0.66
Core lifetime, years	20	15	20
Fuel pin diameter, cm	2.50	1.30	1.30
Fuel pin triangular pitch-to-diameter ratio	1.121	1.54	1.54
Active core dimensions height/diameter, m	0.80/1.02	2.00/2.46	2.00/2.46
Energy converter/balance of plant	Supercritical CO2 Brayton cycle; optional water desalination using reject heat	Supercritical CO2 Brayton cycle; optional water desalination using reject heat	Cascade of H2 production via Ca-Br thermochemical water splitting cycle, in-house electricity production using S-C02 Brayton cycle, and water desalination
Fuel cycle	Sustainable closed fuel cycle; TRUN cores are fissile self sufficient with depleted or natural U feed and minimal waste stream of fission products
Proliferation resistance	Core is a single assembly/cassette that is not composed of individual removable assemblies and has an extremely long lifetime. Access to fuel and neutrons is restricted. Refuelling equipment is brought on site only at the end of the core life and removed following refuelling. Transuranic fuel is self-protective in safeguards sense.
Autonomous load following	Core power adjusts itself to match heat removal from primary circuit by inherent physical processes due to strong reactivity feedback of fast spectrum core.
Passive safety	Core and heat exchangers remain covered by ambient pressure single-phase coolant which removes core power by natural circulation during all operational and postulated accidents at higher temperatures than traditional liquid metal-cooled reactors.
Emergency decay heat removal	Vessel cooling by natural circulation of air; always in effect.

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