# Oklo Groves reactor startup authorization — source note (2026-07-29)

## Visible/source-backed development

Oklo announced that the U.S. Department of Energy approved the Documented Safety Analysis (DSA) for Oklo Isotopes' **Groves Isotope Test Reactor** in Texas under DOE's Reactor Pilot Program. The release says the DSA is the final safety basis for safe startup and follows earlier Preliminary Documented Safety Analysis approval. It says remaining steps include DOE readiness review and startup approval before the facility is authorized to receive/load nuclear fuel, conduct startup testing and proceed toward first criticality.

World Nuclear News reported the item as DOE authorization clearing the way for fuel loading, startup testing and reactor operations, and describes Groves as a low-power test reactor intended to support isotope-production experience.

## Source URLs checked

- Official/company: https://oklo.com/newsroom/news-details/2026/U-S--Department-of-Energy-Approves-Final-Safety-Analysis-for-Oklos-Groves-Isotope-Test-Reactor-Advancing-the-Project-Toward-Operational-Authorization/default.aspx
- Captured official text fallback: `research/energy/oklo-groves-reactor-startup-authorization-source-card-2026-07-29/source_official_oklo_dsa_authorization.md`
- Trade reporting: https://www.world-nuclear-news.org/articles/oklo-cleared-to-start-up-test-reactor
- Captured trade text fallback: `research/energy/oklo-groves-reactor-startup-authorization-source-card-2026-07-29/source_trade_world_nuclear_news_oklo_groves.md`
- Local source summary: `research/energy/oklo-groves-reactor-startup-authorization-source-card-2026-07-29/source-summary.json`

## Factual anchors safe to use

- Entity: Oklo Inc. / Oklo Isotopes.
- Facility: Groves Isotope Test Reactor, near Lockhart in Caldwell County, Texas.
- Program lane: DOE Reactor Pilot Program.
- Decision point: approval of Documented Safety Analysis / authorization pathway for startup steps.
- Status: advanced test-reactor milestone; still separate from commercial grid/data-center deployment.

## Cautions and fairness check

- Oklo is a publicly traded company, so this is **not investment advice** and should not be framed as a stock recommendation.
- A DOE Reactor Pilot Program startup authorization/safety-basis milestone is not the same as NRC licensing for a commercial power plant.
- Groves is an isotope test reactor; do not imply it is already delivering electricity to the grid, mines or AI data centers.
- Company target dates should be labelled as targets until startup/criticality is separately verified.