Xe-100
Project Overview
The U.S. Nuclear Regulatory Commission (NRC) is currently engaged in pre-application activities with X Energy, LLC. (X-energy) starting in September 2018. X-energy is a Rockville, MD company designing the Xe-100 reactor which is a pebble-bed, high-temperature gas-cooled reactor (HTGR). Each reactor will generate 200MWt and approximately 80MWe. The standard Xe-100 "four-pack" plant generates approximately 320MWe.
For more information, please see the Xe-100 reactor pre-application documents (NRC Docket 99902071).
To subscribe to the X-energy Xe-100 email service, select X-Energy Xe-100 from the Advanced Reactors list after entering your email into the GovDelivery system.
Pre-Application Activities
| Product |
Type |
Reference |
Status |
| Xe-100 U.S. Regulatory Engagement Plan (REP) 2023 Update |
Regulatory Engagement Plan |
ML23055B259 |
No review requested |
| Quality Assurance Program Description, Revision 3 |
Topical Report |
ML20343A088 |
Feedback Provided
ML20233A910 |
| Mechanistic Source Term Verification and Validation |
White Paper |
ML19283B524 |
Feedback Provided
ML20069C346 |
| Reactor Pressure Vessel Construction Code Assessment for the Xe-100 Reactor |
White Paper |
ML20202A598 |
Feedback Provided
ML21166A304 |
| Xe-100 Licensing White Paper: Use of Bounding Values |
White Paper |
ML21295A296 |
Feedback provided
ML21323A159 |
| Licensing Application Content and Regulatory Analysis |
White Paper |
ML21120A338 |
Feedback provided
ML21271A629 |
| TRISO-X Pebble Fuel Qualification Methodology |
Topical Report |
ML21246A289 |
Under review |
| Maintenance Staff Optimization Approach |
White Paper |
ML21362A751 |
Feedback provided
ML22095A057 |
| Physical Protection System Approach |
White Paper |
ML22098A228 |
Feedback provided
ML22269A562 |
| Risk-Informed Performance-Based Licensing Basis: X-energy's Approach to NEI 18-04 Implementation |
Topical Report |
ML21221A043 |
Feedback provided ML22308A197 |
| Transient and Safety Analysis Methodologies Framework |
Topical Report |
ML21288A173 |
Under review |
| Control Room Staffing Analysis Methodology |
Topical Report |
ML22004A333 |
Under review |
| Training Programs, Control Room Operator Qualification, and Control Room Operator Eligibility |
White Paper |
ML22153A201 |
Feedback provided ML22294A105 |
| Graphite Qualification Methodology |
Topical Report |
ML22304A197 |
Withdrawn, but feedback was provided in ML23023A248 and ML23033A544. |
| Xe-100 Principal Design Criteria Licensing |
Topical Report |
ML22195A260 |
Under review |
| Probabilistic Risk Assessment Technical Adequacy Approach |
White Paper |
ML22318A236 |
Under review |
| Quality Assurance Program Description, Revision 4 |
Topical Report |
ML22230D075 |
Under review |
| Xe-100 Training Program Methodology |
Topical Report |
ML22364A278 |
Under review |
| Xe-100 Plant Control and Data Acquisition System |
White Paper |
ML23048A309 |
Under review |
| Xe-100 Seismic Design Methodology |
White Paper |
ML23044A310 |
Under review |
Page Last Reviewed/Updated Thursday, March 09, 2023