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GNF3 fuel assembly

Based on evolutionary changes to the proven GNF2 design, the GNF3 fuel assembly blends defense-in-depth technologies and materials with state-of-the-art manufacturing to protect against the most challenging industry issues.

12-18-24

Operating cycle (in months) @ 120% power

6240

Fuel bundles currently in operation

~65%

Debris failure reduction (from GNF2 with Defender Plus®)

0

PCI and corrosion-related failures

3–5x

Lower corrosion-induced bow over Zircaloy-2

Regulatory confidence

GNF3 features and benefits

Utilizing our existing 10x10 lattice design, proven materials, and evolutionary bundle design changes, GNF reduces regulatory hurdles and offers remarkable speed to market over its competition. GNF’s GESTAR II generic compliance process enables us to migrate through the regulatory process with less risk, allowing customers to take advantage of the cost savings and reliability benefits today.

NSF channels

The channels on the GNF3 are made of Zircaloy infused with 1% niobium (Nb), 1% tin (Sn), and 0.35% Iron (Fe). This formulation makes the channels highly resistant to destructive channel distortion. (See an image of a pre-oxidized NSF channel at right. Pre-oxidizing the surface improves manufacturability.)

The channel distortion solution

NSF significantly decreases channel bowing and bulging—caused by so-called “shadow corrosion”—and the need for operational testing. It is up to five times more resistant to channel distortion than the standard Ziracloy-2 found in other fuel bundles currently operating in the world’s BWR fleet.

Services

Make the most of your GNF3 investment

For nearly 60 years, GEH Nuclear Energy has optimized and maintained BWRs. Through it all, we’ve remained focused on the technologies and services that matter most to you: plant performance, dose reduction, life extension, long-term asset management, and parts and outage management.

Refueling/Floor services

Reactor refueling and in-vessel maintenance services for all types of reactors.

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Reactor refueling and in-vessel maintenance services for all types of reactors.

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Nuclear power plant by night with reflection

Power uprates

GEH offers a US NRC-approved approach to thermal power uprates that utilities have relied on since the 1990s. We offer equipment, engineering analysis, and modifications services to address material and obsolescence issues.

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