Unclassified Controlled Nuclear Information - Energy UCNI

A CUI category in the Nuclear grouping of NARA's registry, CUI Basic or CUI Specified depending on the authority, marked CUI//SP-UCNI.

UCNI
CUI//SP-UCNI
Basic and Specified
Nuclear

NARA's description

CUI Registry · Unclassified Controlled Nuclear Information - Energy
Relating to certain design and security information concerning nuclear facilities, materials, and weapons, specific to the Department of Energy.

Verbatim from the registry entry, which NARA last reviewed on May 13, 2025. Fetched 2026-09-08.

Markings

Category marking: UCNI
Banner, Specified authorities: CUI//SP-UCNI
Banner, Basic authorities: CUI
Alternative banner, Basic: CUI//UCNI

A banner reads CUI for Basic categories and CUI//SP-UCNI for Specified ones, followed by any limited dissemination control such as NOFORN. How the marking rule works, verbatim from 32 CFR 2002.20.

Authorities

The law, regulation or Government-wide policy that makes this information CUI, and whether it does so as a Basic or a Specified authority.

Safeguarding or dissemination authority	Basic or Specified	Banner	Sanctions
42 USC 2168(a)(1)	Basic	CUI	42 USC 2168(b) 42 USC 2168(c)
10 CFR 1017	Specified	CUI//SP-UCNI	10 CFR 1017.29 10 CFR 1017.30
10 USC 128(a)	Basic	CUI	—

Source: https://www.archives.gov/cui/registry/category-detail/ucni-doe.