Integral Molten Salt Reactor (IMSR)

Project Overview
The U.S. Nuclear Regulatory Commission (NRC) is currenlty engaged in pre-application activities with Terrestrial Energy USA Inc (TEUSA) starting in October 2019 regarding their Integral Molten Salt Reactor (IMSR) design.
For more information, please see the TEUSA pre-application documents (NRC Docket 99902076).
To subscribe to the Terrestrial Integral Molten Salt Reactor (IMSR) email service, select Terrestrial IMSR from the Advanced Reactors list after entering your email into the GovDelivery system.
Pre-Application Activities
Product | Type | Reference | Status |
Core-Unit Definition – Applicable Structures, Systems and Components | White Paper | ML20097B836 (Revision 0) | Feedback Provided |
Interfaces Between the IMSR® Core-unit and Reactor Auxiliary Building Structures and Systems | White Paper | Feedback Provided | |
Principal Design Criteria for IMSR® Structures, Systems and Components | White Paper | Feedback Provided | |
Examination of Regulatory Requirements to Determine Exemption Needs for the IMSR® Core-Unit | White Paper | Feedback Provided | |
Postulated Initiating Events | White Paper | Feedback Provided | |
Structures, Systems, and Components Classification Methodology | White Paper | Feedback Provided | |
Standard Design Approval Application Content | White Paper | Feedback Provided | |
Principal Design Criteria for IMSR® Structures, Systems, and Components | Topical Report | ML23025A066 (Revision 1) | Under Review |
Uncertainty Quantification Methodology for Calculation of IMSR® Off-Gas Source Term | Technical Report | ML23228A045 | Feedback Provided |
Modeling and Simulation Activities related to Source Term for IMSR® Design Basis Accidents | White Paper | Feedback Provided |
Contacts
Contacts for the Integral Molten Salt Reactor (IMSR) Pre-Application Review | |
|---|---|
Lead Project Manager | |
Contact a Public Affairs Officer | |
Page Last Reviewed/Updated Friday, December 12, 2025
Page Last Reviewed/Updated Friday, December 12, 2025