Cask Design・Development

Our cask design and development creates optimal cask designs by meeting customer needs while maintaining necessary strength, in addition to safety features (heat removal, sealing, shielding, subcriticality), and enhancing manufacturability, handling, and maintainability.

Transport Cask

Fresh MOX Fuel Transport Cask

We had owned and operated casks for transporting spent fuel (HZ-type casks). Since our business began, we have been accumulating expertise regarding transport casks. We are also working on the design of casks for transporting fresh MOX fuel and casks for transporting waste.

Transportable Storage Cask

Transportable Storage Cask

We are also working on the development of transport and storage casks for the intermediate storage of spent fuel, which is currently being undertaken by domestic electric power companies.

Safety Analysis・ Licensing Procedures

We are able to conduct safety analyses of cask designs in-house using various analysis codes. Accurate evaluation of cask performance using advanced analysis technology is also utilized in design improvements and assisting customers with licensing procedures.

Analysis Codes

Example of cask 9 m-drop dynamic impact analysis (LS-DYNA)
Example of cask stress analysis (ABAQUS)
Example of heat flow analysis in cask cavity (FLUENT)
Example of cask thermal analysis by an overall model (ABAQUS)
Cask Example of cask thermal analysis by slice model (ABAQUS)
Gamma ray shielding analysis example of dry cask (DOT3.5)

The following codes are used for various analysis to evaluate cask performance.
･Structural Analysis（ABAQUS, LS-DYNA）
･Thermal Analysis（ABAQUS, FLUENT）
･Containment Analysis/Shielding Analysis（ORIGEN Series, QAD, ANISN, DOT3.5, MCNP, PHITS）
･Criticality Analysis(SCALE Code System, MCNP)

Technical Service

We are the specialist group that is well versed in technical fields related to casks. We provide technical services tailored to diverse needs related to casks, such as the following.

Example of Service

・Cask technology trends research

・Operation planning of casks, cost evaluation

・Technical investigation and research

・Participated in the formulation of standards of the Atomic Energy Society of Japan and the Japan Society of Mechanical Engineers

・Consulting

・Education