| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a furnace outer nuclear instrumentation device capable of accurately increasing the width of a measurable neutron detector current. <P>SOLUTION: In order to arithmetically process a current value measured in a neutron detector by using a detector signal processing circuit and output the state of a neutron flux during an operation, the detector signal processing circuit includes: a current/voltage conversion part which converts the current value converted in the neutron detector to a voltage value corresponding to the current value; and a variable gain amplification part which is provided with a current level coping resistance circuit capable of selecting a gain and an operational amplifier with a D/A converter for adjusting the gain, and amplifies the voltage value converted in the current/voltage conversion part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
