C-70-HIC-84-ID (3 Shts) DryDoorCell.pdf

This document is an instrumentation control drawing for cooling tower cell #1 dry doors at the National Institute of Standards and Technology (NIST) Reactor Operations & Engineering Group facility in Gaithersburg, Maryland. The three-sheet technical drawing (70-HIC-084-1D, Revision 3) details the mechanical and control systems for dry door operation across multiple sections: West and East dry door motor control boxes, marshalling boxes, and the control room.

The drawing specifications include starter assemblies, door wiring configurations, motor control systems, and interconnected electrical schematic diagrams for both the West and East sides of the cooling tower system. Key system components shown are the cooling tower P-5 and P-3 configurations, SCPB P-3 equipment, and D-100 instrumentation. The control room section displays relay contacts, wiring configurations, and position indicators for dry door close and dry door open functions. The document includes detailed notes regarding relay contact conditions, magnetic proximity limit switch types, control zone specifications, and thermal point references. Two revisions are noted in the drawing history, with the most recent revision dated 8/7/06 and created by Jim Boyd with drawings prepared by Rick Mikulyak. This technical schematic serves as the instrumentation control specification for NIST reactor cooling tower operations and maintenance personnel.