International Journal of Nuclear Energy / 2013 / Article / Tab 11

Research Article

A Small-Sized HTGR System Design for Multiple Heat Applications for Developing Countries

Table 11

Technical feasibility assessment for HTR50S.

ComponentsDesign targetCriteriaResults

System designMultiple heat applicationsHeat supply for district heating network (MW)0~250~25
Demonstration of gas turbine and hydrogen productionGas turbine and hydrogen production can be demonstrated by using the secondary side of IHX

CoreReduce the number of uranium enrichmentsNumber of uranium enrichments<63
Reduce the core sizeAverage core power density (MW/m3)3.53.5
Increase plant availabilityRefueling interval (years)22
Maximum fuel temperature (°C)<14951467

Reactor internalShutdown cooling system is designed as nonsafety class systemRPV temperature at AOO (°C)<425420

Reactor pressure vessel (RPV)Reduce the weightWeight in mode of packing (tons)<300about 180

Vessel cooling system (VCS) Passive meansBiological shielding concrete wall temperature at normal operation (°C)<65.064.8 (panel temp.)
Fuel temperature at accident (°C)<1600The acceptance criteria were satisfied in the events of the rupture of concentric hot gas duct in the primary cooling system and the SG tube rupture
RPV temperature at accident (°C)<540

Shutdown cooling system (SCS)Reduce the reactor coolant pressure boundaryEliminate the primary piping related to SCSNo primary piping related to SCS

Steam generator (SG)Reduce the amount of heat-resistance alloyWeight of heat-resistance alloy (tons)<5.41.5

Intermediate heat exchanger (IHX) Thermal duty: 20 MWPrimary stress limit (MPa)
(creep damage factor <0.1, 40 years of lifetime)
≤2.62.6
Inline layout of the concentric duct nozzlesVessel temperature (°C)<370305

Containment structureReduce the weightWeight of steel (tons)<700About 420
Minimize the amount of air which may react with graphite componentsFree volume (m3)>32903860 (without IHX),
3700 (with IHX)
Withstand the pressure transient Free volume (m3)<3890
Pressure at rupture of main steam piping (MPa)<0.410.12

Safety analysisSatisfy the acceptance criteriaShown in Table 10The acceptance criteria were satisfied in the events of the rupture of concentric hot gas duct in the primary cooling system and the SG tube rupture

AOO: anticipated operational occurrence.

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19.