Quick search by citation:

50 U.S. Code Chapter 41 - NATIONAL NUCLEAR SECURITY ADMINISTRATION

SUBCHAPTER I—ESTABLISHMENT AND ORGANIZATION (§§ 2401 – 2411)
SUBCHAPTER II—MATTERS RELATING TO SECURITY (§§ 2421 – 2426)
SUBCHAPTER III—MATTERS RELATING TO PERSONNEL (§§ 2441 – 2446)
SUBCHAPTER IV—BUDGET AND FINANCIAL MANAGEMENT (§§ 2451 – 2455a)
SUBCHAPTER V—MISCELLANEOUS PROVISIONS (§§ 2461 – 2466)
SUBCHAPTER VI—DEFINITIONS (§ 2471)
SUBCHAPTER VII—TRANSITION PROVISIONS (§§ 2481 – 2484)