# Federal Register #2026-22473

DOE Security Boundary Notice for SLAC National Accelerator Laboratory

**Posted:** November 04, 2026
**Identifier:** 2026-22473

This Department of Energy notice defines a security boundary for SLAC National Accelerator Laboratory in Menlo Park, California.
- **Government buyer:** U.S. Department of Energy (DOE), Office of Science; site: SLAC National Accelerator Laboratory.
- **Notice purpose:** Establishes a boundary around approximately 426.3 acres of property.
- **Security requirements:** Unauthorized entry and unauthorized introduction of weapons or dangerous materials onto the property are prohibited. The boundary is identified by signage, chain-link fencing, and other physical features.
- **Procurement status:** This is a security and property notice, not a solicitation or contract award; no products, services, OEMs, or vendors are identified.

### Description

The U.S. Department of Energy gives notice of a security boundary for the SLAC National Accelerator Laboratory in Menlo Park, California. Under Section 229 of the Atomic Energy Act of 1954, unauthorized entry and the unauthorized introduction of weapons or dangerous materials into or upon the described property are prohibited. The site consists of approximately 426.3 acres and is bounded by signage, chain-link fencing, and other physical features. The action is effective November 4, 2026.

[View original listing](https://www.federalregister.gov/documents/2026/11/04/2026-22473/notice-of-229-boundary-for-the-slac-national-accelerator-laboratory)