Nuclear fuel transport: Efficiency and losses
Why transport barely registers in nuclear energy's budget
Why transport barely registers in nuclear energy's budget What this tab covers How much energy is lost while it moves and while it waits in storage or transit, and how much energy the transport itself consumes, in per cent.Practically no nuclear fuel is lost in transit, and the energy used to move it is a tiny fraction of the energy it carries.
Losses by measure
| Measure | Range | Type | What is measured |
|---|---|---|---|
| Material released from Type B casks in transport accidents | 0%1 | Lost in transit | No Type B cask has ever been breached or leaked in transport |
| Diesel energy to truck one fresh-fuel load 1,000 km | 0.0002% of electricity the fuel will generate110 | Used to drive transport | About 330 litres of diesel (32.6 L per 100 km for a typical EU tractor-trailer), roughly 3.3 MWh at about 10 kWh per litre, against about 1.75 TWh of electricity per truckload (one of 4.5 loads for a 1,000 MWe reactor-year at 90% load) (calculated) |
| Radioactive material's share of US dangerous-goods shipping cost | 0.5% (upper bound)1 | Used to drive transport | Less than 0.5% of US hazardous materials shipping cost |
Holding periods and inventory
| Measure | Value |
|---|---|
| Average US radioactive shipment distance | About 55 km (against 185 km for all hazardous materials)1 |
| Test US spent-fuel train run | 1,680 miles round trip, Colorado to Idaho3 |
| Licensed interim storage term (Texas site) | 40 years for up to 5,000 tonnes of used fuel4 |
Unlike fossil fuels, nuclear fuel does not evaporate, leak or get stolen in measurable amounts: every kilogram is accounted for under safeguards. The only real 'loss' is time, since spent fuel can wait decades in pools and dry casks before it moves, and in the US it still has nowhere permanent to go.
Because one truck carries fuel that will make roughly 1.75 TWh of electricity (calculated), transport energy is negligible. The cost lies in security escorts, licensing and the heavy casks themselves, not in fuel for the vehicle.
Sources
- Transport of Radioactive Materials (updated August 2026) World Nuclear Association, 2026
- DOE-designed railcar cleared for use World Nuclear News, 2024
- US Supreme Court rules on interim storage facility case World Nuclear News, 2025
- Fuel consumption testing of tractor-trailers in the European Union (fact sheet) ICCT, 2018