Artist rendering of Natrium reactor design showing the following components, Reactor Aux. Building, IAC - Intermediate Air Cooling, RVACS - Reactor Vessel Auxiliary Ducts, Reactor Building, Refueling access Area, Fuel Handling Building, Used Fuel, Water Pool, Head Access Area, Reactor and Core, Hot Pip, Cold Pip, RVACS Basement Area. Also displaying Hitachi and Terra Power Logos

Project Overview

The U.S. Nuclear Regulatory Commission (NRC) is currently engaged in pre-application activities interactions for the Natrium reactor. The Natrium design combines features from the previous GEH PRISM and TerraPower Traveling Wave designs. The proposed Natrium reactor is a 345 MWe pool type sodium fast reactor using HALEU metal fuel.

For more information, please see the Natrium pre-application documents (NRC Docket 99902100). Additional TerraPower documents can be found at NRC Docket 99902087.

To subscribe to the TerraPower Natrium email service, select TerraPower Natrium from the Advanced Reactors list after entering your email into the GovDelivery system.

For information about TerraPower’s Molten Chloride Fast Reactor (MCFR), please see the MCFR webpage.

For information related to the NRC staff’s review of Kemmerer Power Station Unit 1 application please see TerraPower, LLC -- Kemmerer Power Station Unit 1 Application

Pre-Application Activities 

Product Type Reference Status
Regulatory interpretation of the applicability of 10 CFR 50.10 to the construction of the Sodium Test and Fill Facility White Paper ML22154A564 Feedback Provided
Quality Assurance Topical Report (QATR) Topical Report ML21005A015 Feedback Provided
Advanced SFR Fuel Assembly Qualification Plan White Paper ML20316A038 Feedback Provided
Advanced Fuel Qualification Methodology Report-Regulatory Guidance Development Report White Paper ML20209A155 Feedback Provided
TerraPower-Type 1 Fuel Pin Qualification Plan White Paper ML21057A008 Feedback Provided
TerraPower, LLC - Natrium Decoupling Strategy White Paper ML22035A331 Cancelled
TerraPower, LLC, Submittal of Testing Programs White Paper ML22273A073 Feedback Provided
TerraPower, LLC Topical Report, Regulatory Management of Natrium Nuclear Island and Energy Island Design Interfaces Topical Report ML22277A824 Feedback Provided
Revised TerraPower, LLC Quality Assurance Topical Report, Revision 14 Topical Report ML22266A286 Feedback Provided
TerraPower, LLC, Regulatory Gap Analysis Report White Paper ML22266A285 Feedback Provided
Principal Design Criteria for the Natrium Advanced Reactor Topical Report ML23024A281 Feedback Provided
Fuel and Control Assembly Qualification Plan Topical Report ML23025A409 Under Review
Nascent Thermal Hydraulic Model White Paper White Paper ML23080A013 Feedback Provided
Plume Exposure Pathway Emergency Planning Zone Methodology, Revision 1 Topical Report ML23080A045

Under Review
An Analysis of the Potential Volcanic Hazards at the Proposed Natrium Site Near Kemmerer, Wyoming Topical Report ML23115A387 Feedback Provided
Human Factors Engineering Program Plan and Methodologies Topical Report ML23116A226 Under Review
Human Factors Engineering (HFE) Concept of Operations White Paper ML23125A328 Feedback Provided
Preliminary Consensus Codes and Standards White Paper ML23130A413 Feedback Provided
Radiological Source Term Methodology Report, Revision 1 Topical Report ML23223A235

Under Review
Design Basis Accident Methodology for In-Vessel Events without Radiological Release Topical Report ML23272A260 Under Review
Radiological Release Consequences Methodology Topical Report ML23311A139 Under Review
Reactor Stability Methodology Topical Report ML23334A239 Under Review
Partial Flow Blockage Methodology Topical Report ML24085A822 Under Review
Design Basis Accident Methodology for Events With Release Topical Report ML24082A262 Under Review
Reactor Seismic Isolation System Qualification Topical Report ML24068A212 Under Review
Instrumentation and Control Architecture and Design Basis Topical Report ML24068A186 Under Review