Hermes – Kairos Application

image of Kairos - Hermes
Who:   Kairos Power LLC
What:   Application for a construction permit for an advanced test reactor
When:   September 29, 2021 (date of application submittal)
Where:   Oak Ridge, Tennessee

Project Overview

The staff of the U.S. Nuclear Regulatory Commission (NRC) is currently engaged in review activities of the Hermes construction permit application. Kairos Power LLC, is a U.S. based company developing a fluoride salt cooled high temperature reactor (KP-FHR) using TRISO fuel in pebble form.

Plant Characteristic Description
Reactor Type Low-power test reactor to support development of Kairos Power’s fluoride salt-cooled, high-temperature reactor (KP-FHR) technology.
Containment Type Functional containment implemented principally by the high temperature TRISO particle fuel. The fuel utilizes a carbon matrix coated fuel particle, similar to that developed for high temperature gas-cooled reactors, in a pebble-based fuel element. (See SECY-18-0096 for a description of functional containment.)
Power Level 35 MWth (The test reactor will not produce electricity.)
Fuel Tri-structural Isotropic (TRISO) fuel particles embedded in a carbon matrix pebble. High Assay Low Enriched Uranium (HALEU)

All public documents related to Kairos pre-application activities may be found in ADAMS using the "Advanced Search" tab with a "Document Properties:" selection of Docket Number is equal to 99902069.  All public documents related to the Hermes construction permit application review may be found with a selection of Docket Number is equal to 05007513. For additional detail, see the following related pages:

Contacts for the Kairos Power LLC
Safety Project Manager Benjamin Beasley

Samuel Cuadrado de Jesus
Environmental Project Managers Tamsen Dozier

Peyton Doub
Public Affairs Officer Scott Burnell

Page Last Reviewed/Updated Monday, December 20, 2021