HI-STORM 100
The Optimal Solution for Spent Nuclear Fuel Storage
The HI-STORM 100 is a vertical, ventilated overpack designed to shield radiation and provide strong structural protection for the MPC it contains. Engineered for resilience, it can withstand extreme conditions such as high winds, tornadoes, and lightning. The HI-STORM system is available in both above-ground and underground configurations. It is designed to accommodate a wide variety of spent nuclear fuel assemblies and other radioactive materials in a single overpack by utilizing different MPCs.
Key Features
In most regions worldwide, the above-ground HI-STORM system can be installed as a free-standing unit, though its design also allows for secure anchoring to an ISFSI pad when needed. Key features that make the HI-STORM model an optimal solution for spent nuclear fuel storage include:
The HI-STORM 100 overpack features a high-ductility carbon steel structure that serves as its backbone and is fully qualified to meet ASME Section III, Subsection NF standards.
HI-STORM features four air inlets and four outlets at the lower and upper ends of the cask ducts, enabling passive cooling of the MPC through natural convection.
The internal cavity of the above-ground HI-STORM is designed with the height and diameter needed to house the MPC securely. The cask delivers robust biological shielding to ensure public safety and the structural strength to withstand extreme natural events, including tornadoes and wind-driven debris.
The steel weldment surrounding the concrete serves as the primary structural component, effectively preventing any loss of strength that could result from weather-related concrete degradation.
The inlet and outlet duct designs, along with the patented Photon Attenuator, effectively prevent radiation streaming.
The above-ground HI-STORM overpack is a METCON (metal/concrete) cylindrical vessel with thick walls composed of inner and outer steel shells surrounding a poured concrete barrier. It is sealed with a heavy, bolted concrete and steel lid for maximum strength and protection.
The interior surface includes features specifically designed to reduce inertia loads on the MPC in the event of a postulated tip-over.
The space between the overpack and the MPC is optimized to enhance ventilation-driven cooling of the MPC and its contained spent nuclear fuel.
The HI-STORM 100 System includes engineered seismic damping features that enhance stability at high-seismic ISFSI sites.
The ducts feature Holtec’s innovative photon attenuators, which block gamma streaming, and are fitted with fine mesh screens to prevent insect entry.
You must be logged in to post a comment.