ML25274A126
| ML25274A126 | |
| Person / Time | |
|---|---|
| Site: | Kemmerer File:TerraPower icon.png |
| Issue date: | 10/01/2025 |
| From: | TerraPower |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML25274A123 | List: |
| References | |
| TP-LIC-LET-0459 | |
| Download: ML25274A126 (1) | |
Text
SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED ENCLOSURE 3 TerraPower Supplemental R&D Information (Public)
SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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))(a)(4),ECI TerraPower is now pursuing surface roughening as a method of increasing surface emissivity. ((
))(a)(4),ECI Future work in this area includes sensivity analyses, methods validaon, and establishing a "nal emissivity value.
Once this work is completed, the "nal design soluon will incorporate the updated emissivity requirement and controlled process speci"caon. The current decisions could be revisited if results of the above work are not as expected.
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED Supplemental SHX Information DBHE Description The design of the SHXs is currently in the conceptual design phase. Several heat exchanger designs have been considered and studied in detail (i.e-Shell and Tube Heat Exchangers, Shell and Plate Heat Exchangers, Perimeter Welded Plate Heat Exchangers, Fin and Plate Heat Exchangers, etc.). The SHX design that has been selected is an etched diusion bonded heat exchanger (DBHE).
DBHEs are also referred to as printed circuit heat exchangers (PCHEs), as the channel layout process is similar to that of printed circuit boards. These DBHEs are manufactured by a chemical etching process for the channels in metal plates and then combined using the diusion bonding process. The DBHEs are compact heat exchangers that can sustain high dierenal pressures at elevated temperatures, while maintaining high thermal eecveness.
Diusion bonding is a solid state welding process that bonds two contacng surfaces through the applicaon of heat and pressure in a vacuum environment. The process is performed at elevated temperatures (typically 70-80% of the melng point) and at moderate pressures (700-1400 psi). The plate surfaces merge by a diusion process.
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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))(a)(4),ECI Descripon of the Sodium-Salt Reacon R&D Plan A series of lab tesng was completed in 2024, ((
))(a)(4),ECI These results prompted TerraPower to consider double wall SHX designs.
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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SUBJECT TO DOE COOPERATIVE AGREEMENT NO. DE-NE0009054 Copyright 2025 TERRAPOWER, LLC. ALL RIGHTS RESERVED
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