Mass Atomics helps utilities, fuel suppliers, isotope producers, and decommissioning teams design packages, win certification, and ship radioactive materials by road, rail, and barge — compliantly, defensibly, and on schedule.
Fig. 01 — Type B packages on dedicated railcars · Photo: spent-fuel casks in transit configuration
Built for the teams who have to get this right
Utilities · Fuel fabricators · HALEU & advanced-reactor developers · Medical isotope producers · Decommissioning contractors · Carriers & riggers
Transport is where nuclear projects meet the public road, the railroad, and three regulators at once. We close the gap between a package that exists and a shipment that is approved to move.
From concept to Certificate of Compliance — structural, thermal, shielding, and criticality inputs organized into a Safety Analysis Report (SAR) the NRC can review.
Route surveys, bridge and clearance checks, state permits, tribal and state notifications, and contingency planning — before the cask ever leaves the pad.
One shipment, overlapping rulebooks. We map every requirement so nothing falls between NRC, DOT, and state agencies.
Road, rail, and barge are not three shipments — they are one chain with two risky handoffs. We engineer the handoffs.
Shielding, dose-rate, thermal, and criticality calculations that hold up under normal conditions and hypothetical accidents.
Crews, carriers, and emergency responders who have rehearsed the plan move differently when something goes wrong.
Different contents fail in different ways, need different packages, and trigger different rules. We start every engagement with the material — not the vehicle.
Dry-cask and wet-shipment campaigns from reactor sites to storage or a future repository. Heat, shielding, and criticality control in a dual-purpose canister or transport cask — plus the public and state engagement a spent-fuel route demands.
UF₆ cylinders, oxide powder, pellets, and finished assemblies for conventional and advanced reactors. Criticality safety index, moderation control, and the new HALEU package bottleneck — planned early, before it delays first core load.
Mo-99, Lu-177, Ac-225, and other short-lived products where decay is eating the shipment's value by the hour. Fast, compliant routing and packaging that protects both dose limits and delivery windows.
Reactor vessels, steam generators, LLW, and GTCC waste. Oversize/overweight planning, SCO and LSA classification, and packages for loads that were never designed to travel.
In radioactive transport, safety does not ride with the driver or the locomotive — it rides in the package. Regulations assume the vehicle can crash. The cask must survive the drop, the puncture, the fire, and the water, and still contain its contents. That is why package strategy comes first in every plan we write.
Most clients arrive with a material and a deadline, not a package model. That is the right starting point. Tell us the isotope, form, activity, and destination — we will map the package options and what each one costs in certification time.
Ask about a material →Tap each hypothetical accident condition. A certified Type B package must pass all four, in sequence, on the same specimen — and still meet containment and shielding limits.
Pick a material, a mode, and a rough distance. This gives you a starting package class, the rules that will govern it, and a realistic planning horizon. It is a scoping tool — not a compliance determination.
Characterize the material, activity, heat load, and fissile content. Confirm the destination can legally and physically receive it.
Select or design the package, check its Certificate of Compliance covers your exact contents, and close any SAR gaps.
Route, permits, notifications, carrier qualification, lift and transload plans, security and emergency information.
Pre-shipment surveys, dose and contamination checks, shipping papers, tracking, and a close-out file that survives an audit.
10 CFR 71Package certification, QA, dose and containment limits, and hypothetical accident conditions.
49 CFR 171–180Classification, shipping papers, marking, labeling, placarding, and carrier requirements.
10 CFR 73Security planning for spent fuel and strategic special nuclear material in transit.
IAEA SSR-6The global basis for cross-border moves and for most national regulations outside the U.S.
Mass Atomics was founded on a simple observation from the fuel-cycle world: America knows how to make, burn, and store nuclear fuel far better than it knows how to move it. As restarts, uprates, SMRs, and HALEU production all scale up, transport — packages, routes, permits, and public trust — is becoming the bottleneck.
We are a focused consulting practice, not a carrier and not a cask vendor. That independence matters: our job is to recommend the package and the route that fit your material and your regulator, not the one we happen to sell.
No packages to sell, no trucks to fill. Recommendations follow the analysis.
Every deliverable is written so an NRC or DOT reviewer can trace the claim to its source.
Bridge clearances, crane radii, and tie-downs checked against the real route — not just the regulation.
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