Preamplifier for a wide range neutron flux monitoring system

Patent · Tue Jan 15 04:00:00 EST 1985

OSTI ID:5571301

Seki, E; Endo, Y; Fukushima, T; Itoh, T; Shirayama, S; Tai, I

A preamplifier for a wide range neutron flux monitoring system is disclosed. The preamplifier contains first to fifth amplifiers and a selection switch. The first amplifier for high frequency band amplification has a low input impedance circuit. The second amplifier for low frequency band amplification has a high input impedance circuit. Either of the first and second amplifiers can provide a path for the neutron flux level signal derived from a detector according to the frequency of the neutron flux level signal. The third amplifier (pulse amplifier) amplifies the output signal of the first amplifier and transfers the amplified signal to a pulse signal counting system. The lower frequency band Campbell signal is applied to the Campbelling system, through the second amplifier, the fourth amplifier (low frequency band Campbelling amplifier), and the selection switch. The higher frequency band Campbell signal is applied to the Campbelling system, through the first amplifier, the fifth amplifier (high frequency band Campbell amplifier), and the selection switch.

• Assignee: Tokyo Shibaura Denki Kabushiki Kaisha (Japan)
• Patent Number(s): US 4493811
• OSTI ID: 5571301
• Country of Publication: United States
• Language: English

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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
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AMPLIFIERS
BWR TYPE REACTORS
CONTAINERS
ELECTRIC IMPEDANCE
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
IMPEDANCE
MEASURING INSTRUMENTS
MONITORING
NEUTRON DETECTORS
NEUTRON FLUX
PREAMPLIFIERS
PRESSURE VESSELS
RADIATION DETECTORS
RADIATION FLUX
REACTORS
SIGNALS
SWITCHES
WATER COOLED REACTORS
WATER MODERATED REACTORS