HFIR Forecast & Planning Schedule
August 26, 2025 is the earliest restart date; any schedule changes will be posted online and communicated by the User Office.
Download the Forecast & Planning Schedule (PDF)
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High Flux Isotope Reactor
- BIO-SANS | Biological Small-Angle Neutron Scattering Instrument | CG-3
- CTAX | Cold Neutron Triple-Axis Spectrometer | CG-4C
- DEMAND | Dimensional Extreme Magnetic Neutron Diffractometer | HB-3A
- DEV BEAMS | Instrument Development Beamline | HB-2D CG-1A CG-1B CG-4B
- GP-SANS | General-Purpose Small-Angle Neutron Scattering Diffractometer | CG-2
- HIDRA | High Intensity Diffractometer for Residual stress Analysis | HB-2B
- IMAGINE | Laue Diffractometer | CG-4D
- MARS | Multimodal Advanced Radiography Station | CG-1D
- POWDER | Neutron Powder Diffractometer | HB-2A
- PTAX | Polarized Triple-Axis Spectrometer | HB-1
- TAX | Triple-Axis Spectrometer | HB-3
- VERITAS | Versatile Intense Triple-Axis Spectrometer | HB-1A
- WAND² | Wide-Angle Neutron Diffractometer | HB-2C
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Spallation Neutron Source
- ARCS | Wide Angular-Range Chopper Spectrometer | BL-18
- BASIS | Backscattering Spectrometer | BL-2
- CNCS | Cold Neutron Chopper Spectrometer | BL-5
- CORELLI | Elastic Diffuse Scattering Spectrometer | BL-9
- EQ-SANS | Extended Q-Range Small-Angle Neutron Scattering Diffractometer | BL-6
- FNPB | Fundamental Neutron Physics Beam Line | BL-13
- HYSPEC | Hybrid Spectrometer | BL-14B
- LIQREF | Liquids Reflectometer | BL-4B
- MAGREF | Magnetism Reflectometer | BL-4A
- MANDI | Macromolecular Neutron Diffractometer | BL-11B
- NOMAD | Nanoscale-Ordered Materials Diffractometer | BL-1B
- NSE | Neutron Spin Echo Spectrometer | BL-15
- POWGEN | Powder Diffractometer | BL-11A
- SEQUOIA | Fine-Resolution Fermi Chopper Spectrometer | BL-17
- SNAP | Spallation Neutrons and Pressure Diffractometer | BL-3
- TOPAZ | Single-Crystal Diffractometer | BL-12
- USANS | Ultra-Small-Angle Neutron Scattering Instrument | BL-1A
- VENUS | Versatile Neutron Imaging Instrument | BL-10
- VISION | Vibrational Spectrometer | BL-16B
- VULCAN | Engineering Materials Diffractometer | BL-7
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High Flux Isotope Reactor
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Operating Status
- As of 09:29:49 06/10/2025 reactor power is 0 MW.
- The reactor is currently shutdown for end of Cycle-511. Startup for Cycle-512 is scheduled for Aug. 26, 2025.
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Neutron Sciences Directorate
One Bethel Valley Rd
Oak Ridge, TN 37831
Office Phone: 865-574-0558
User Office Phone: 865-574-4600
One Bethel Valley Rd
Oak Ridge, TN 37831
Office Phone: 865-574-0558
User Office Phone: 865-574-4600
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