Figure 1.
Schematic of modular layout. Solid lines represent the 10 modules that comprise the vault. Dashed lines represent the modules that provide the ancillary work areas.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.