Integral Molten Salt Reactor (IMSR)

Artist rendering of Terrestrials 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)
ML22138A340 (Revision 1)
Feedback Provided
ML20121A139 (Revision 0)
Feedback Provided  ML22278B100 (Revision 1)
Interfaces Between the IMSR® Core-unit and Reactor Auxiliary Building Structures and Systems White Paper ML20157A195, ML21029A222 Feedback Provided
ML20191A198,
ML21061A071
Principal Design Criteria for IMSR® Structures, Systems and Components White Paper ML20178A442,
ML21025A030
Feedback Provided
ML20304A561,
 ML20304A610
Examination of Regulatory Requirements to Determine Exemption Needs for the IMSR® Core-Unit White Paper ML20262H163 Feedback Provided
ML20302A488
Postulated Initiating Events White Paper ML20318A169,
ML20318A171
ML21357A013
ML21357A011
Feedback Provided
ML22140A276
Structures, Systems, and Components Classification Methodology White Paper ML21323A013 ML21323A014 Feedback Provided
ML22033A370
ML22033A458
Standard Design Approval Application Content White Paper ML21014A352 Feedback Provided
ML21081A226
ML21081A287  
Principal Design Criteria for IMSR® Structures, Systems, and Components Topical Report ML23025A066 Under Review
Uncertainty Quantification Methodology for Calculation of IMSR® Off-Gas Source Term Technical Report ML23228A045
ML24053A173(Revision 2)
Feedback Provided
ML23286A100