C-70-HIC-85-ID (3 Shts) WetDoorCell.pdf

This document is a technical instrumentation and control drawing for cooling tower cells at the National Institute of Standards & Technology (NIST) Reactor Operations & Engineering Group facility in Gaithersburg, Maryland.

The drawing set contains three sheets depicting wet door motor control boxes, cooling towers, SCPB (Supervisory Control and Protection Box), and D-100 instrumentation systems for a cooling tower cell instrumentation control system. Each sheet illustrates the East and West configurations of motor control assemblies, control wiring, and interconnections to the control room. The schematics show wet door mechanisms, motor controls, limit switches, solenoid valve controls, and electrical distribution to various instrumentation sensors and actuators. Notes on each sheet reference specific design requirements including de-energized condition protocols, magnetic proximity limit switch specifications, and thermal points/component layout considerations. Revision tracking tables document multiple ECN (Engineering Change Notice) approvals dated 8/9/04, including revisions for drain in conduit corrections and new SCPB configurations. The drawings are designed by C.J. Roe, reviewed by T.J. Holohan, and approved by NRC Redford, with dates of 5/21/04 and 6/9/04. Drawing number 70-HC-085-D is designated as Sheet 1, 2, and 3 of 3, with dimensions noted in feet and inches. The document serves as the technical specification for cooling tower cell #1, #2, and #3 instrumentation control implementation.