Nuclear incident monitor (31 Nov 1977) (Engineering Materials)
An improved instrument to detect radiation emitted by the accidental assembly of a critical mass of fissionable material is described. The instrument is a gamma radiation monitor with audible and visible alarms which actuate when the monitor is exposed to a radiation rate exceeding one roentgen per hour. The instrument is ac powered with a backup self-contained battery. The detector is an air-filled ionization chamber. An electrometer amplifier is supplied to convert current from the chamber to a voltage signal. A voltage comparator monitors the voltage signal and energizes an alarm relay when chamber current exceeds a preset value. A fault detector monitors critical circuits and initiates a trouble alarm if a fault is detected. (FS)
- Research Organization:
- Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
- OSTI ID:
- 5688416
- Report Number(s):
- CAPE-2648
- Country of Publication:
- United States
- Language:
- English
Similar Records
LLL model NR-1 tritium sniffer (5 Mar 1975) (Engineering Materials). [34 drawings]
Personal radiation monitor (PRM) -belt model Q-2941A (24 Jan 1978) (Engineering Materials)
Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AC SYSTEMS
ALARM SYSTEMS
AMPLIFIERS
CRITICAL MASS
DESIGN
DETECTION
DIAGRAMS
ELECTRIC BATTERIES
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTROMETERS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ENERGY STORAGE SYSTEMS
EQUIPMENT
GAMMA DETECTION
IONIZATION CHAMBERS
MEASURING INSTRUMENTS
POWER SYSTEMS
RADIATION DETECTION
RADIATION DETECTORS