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Nuclear SMR - Reactor-to-Shaft Equivalent

Small Modular Reactor propulsion is zero-carbon at operation. WtW GHG comes entirely from reactor construction, fuel cycle, and decommissioning. This tool compares reactor energy output to conventional fuel equivalence.

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Formula, assumptions, limits

TTW CO2 (t)=massCf\text{TTW CO}_2 \text{ (t)} = \text{mass} \cdot C_fEnergy (MJ)=mass (kg)LCV (MJ/kg)\text{Energy (MJ)} = \text{mass (kg)} \cdot \text{LCV (MJ/kg)}WtW (t CO2e)=Energy (MJ)WtW factor (g/MJ)106\text{WtW (t CO}_2 \text{e)} = \frac{\text{Energy (MJ)} \cdot \text{WtW factor (g/MJ)}}{10^6}

WtW factors include upstream extraction, processing, transport, plus tank-to-wake combustion and relevant CH₄/N₂O. FuelEU Maritime Annex II publishes the authoritative defaults.

In short

Compare nuclear Small Modular Reactor propulsion to conventional fuel equivalence - shaft energy, fuel displacement, lifecycle GHG.

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