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Spent fuel storage and transport

BOTTLENECK

No permanent US repository forces indefinite on-site storage, and NRC-licensed cask designs from Holtec are hard for competitors to replicate.

Stores and moves spent nuclear fuel from reactor pools to dry casks for long-term holding. No permanent US repository exists, so on-site storage duration keeps extending. Holtec, Orano, and NAC capture value through NRC-licensed cask designs that competitors cannot easily replicate.

At-reactor storage of discharged fuel assemblies in spent fuel pools (SFPs); transfer to dry cask independent spent fuel storage installations (ISFSIs); inter-site transport in licensed shipping casks.

What the evidence shows

Three companies – Holtec, NAC International and Areva-Transnuclear NUHOMS – market ISFSI based on an unshielded multi-purpose canister.

en.wikipedia.org

Holtec holds 13 certifications from the U.S. NRC and its systems have been accepted by nuclear regulators in 13 countries.

holtecinternational.com

NAC International holds eleven major U.S. NRC-licensed systems including several first-of-their-kind technologies.

nacintl.com
RESCORED JUL 2026fragmentedlegacy

Who controls it

Holtec InternationalNAC InternationalAreva-Transnuclear NUHOMS

No independently verified market-size figure is published for this node yet.

Where it sits in the stack

Takes in: Discharged fuel assemblies from reactor

Sends on: Safely stored and retrievable spent fuel; licensed transport to interim or consolidated storage

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Related nodes

Uranium conversion (U3O8 to UF6)Uranium enrichment (LEU and HALEU)Nuclear fuel fabricationSpent fuel reprocessing and recyclingRadioactive waste management and geological disposal

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