PGM-1 pipeline monitoring instrument

• Compact (size 6-1/2 inches x 20 inches)
• Lightweight detector/Dewar bottle assembly weighing 8-10 pounds, stainless steel cover weighing 25 pounds, aluminum cover weighing around 12 pounds
• 1/4 inch Swagelock fitting for cooling end caps (optional)
• Foam rubber insulation reduces impact
• External interface for in-situ LN2 refilling
• Specification electrical connection
• waterproof
• Can provide Be or Al end caps

The ORTEC Pipeline Monitor (PGM-1) is designed to monitor fluid/vapor density in the coolant pipelines of nuclear reactors. Other applications include monitoring of corrosion product activity, activation analysis of sulfur in coal slurry, and chimney monitoring. In applications that require high-resolution gamma ray spectroscopy measurements, such as reactor coolant pipeline monitoring, high-purity germanium (HPGe) radiation detectors can be used. However, all germanium radiation detectors require liquid nitrogen (LN2) cooling to operate. The special Dewar flask (thermos flask) design meets the requirements of compact space.

The temperature of the reactor coolant piping within a range of 0.5 inches from the detector window can reach up to 650 ° F. To ensure sufficient cooling protection in this environment, stainless steel end caps are equipped with built-in cooling pipes that can circulate cold water as needed. This small and sturdy component is fixed to the coolant pipeline through flanges.

Liquid nitrogen is periodically refilled through a separate automatic filling system connected to the rear of the shell. The retention time of LN2 Dewar flask exceeds 16 hours. The electrical connection of the detector components (preamplifier power supply, detector, high voltage bias, high voltage cutoff, amplifier output, test pulse generator input) is achieved through specification connectors. This compact structure (measuring approximately 20 inches in length and 6-1/2 inches in diameter) and sturdy radiation detector assembly can be operated indoors or outdoors.