Natrium

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 ML22174A425
Quality Assurance Topical Report (QATR)	Topical Report	ML21005A015	Feedback Provided ML22018A301 ML22018A300 ML21263A236
Advanced SFR Fuel Assembly Qualification Plan	White Paper	ML20316A038	Feedback Provided ML21099A081
Advanced Fuel Qualification Methodology Report-Regulatory Guidance Development Report	White Paper	ML20209A155	Feedback Provided ML20310A278
TerraPower-Type 1 Fuel Pin Qualification Plan	White Paper	ML21057A008	Feedback Provided ML21147A548 ML21153A083
TerraPower, LLC - Natrium Decoupling Strategy	White Paper	ML22035A331	Cancelled
TerraPower, LLC, Submittal of Testing Programs	White Paper	ML22273A073	Feedback Provided ML23074A347
TerraPower, LLC Topical Report, Regulatory Management of Natrium Nuclear Island and Energy Island Design Interfaces	Topical Report	ML22277A824	Feedback Provided ML24011A321
Revised TerraPower, LLC Quality Assurance Topical Report, Revision 14	Topical Report	ML22266A286	Feedback Provided ML23220A295 ML23213A199
TerraPower, LLC, Regulatory Gap Analysis Report	White Paper	ML22266A285	Feedback Provided ML23080A086
Principal Design Criteria for the Natrium Advanced Reactor	Topical Report	ML23024A281 ML24101A362	Feedback Provided ML24197A226
Fuel and Control Assembly Qualification Plan	Topical Report	ML23025A409	Feedback Provided ML24220A154 ML25083A296
Nascent Thermal Hydraulic Model White Paper	White Paper	ML23080A013	Feedback Provided ML23229A541
Plume Exposure Pathway Emergency Planning Zone Methodology, Revision 3	Topical Report	ML23080A045 ML23321A036 ML24303A147 ML24304B034	Feedback Provided ML25065A250
An Analysis of the Potential Volcanic Hazards at the Proposed Natrium Site Near Kemmerer, Wyoming	Topical Report	ML23115A387	Feedback Provided ML24303A409
Human Factors Engineering Program Plan and Methodologies	Topical Report	ML23116A226 ML24261B925	Feedback Provided ML25085A268
Human Factors Engineering (HFE) Concept of Operations	White Paper	ML23125A328 ML24261B926	Feedback Provided ML23321A087
Preliminary Consensus Codes and Standards	White Paper	ML23130A413	Feedback Provided ML23319A338
Radiological Source Term Methodology Report, Revision 1	Topical Report	ML23223A235 ML24017A116 ML24261B944	Feedback Provided ML25211A271
Design Basis Accident Methodology for In-Vessel Events without Radiological Release	Topical Report	ML23272A260 ML24295A202	Feedback Provided ML25189A082
Radiological Release Consequences Methodology	Topical Report	ML23311A139 ML24208A181	Feedback Provided ML25057A290
Reactor Stability Methodology	Topical Report	ML23334A239 ML24232A231	Feedback Provided ML25105A066
Partial Flow Blockage Methodology	Topical Report	ML24085A822 ML25129A064	Under Review
Design Basis Accident Methodology for Events With Release	Topical Report	ML24082A262 ML25063A329	Under Review
Reactor Seismic Isolation System Qualification	Topical Report	ML24068A212	Under Review
Instrumentation and Control Architecture and Design Basis	Topical Report	ML24305A009 ML24068A186	Feedback Provided ML25036A030