DETECTION SENSITIVITY CALIBRATION SYSTEM OF MOVABLE TYPE INSTRUMENTATION DEVICE IN REACTOR CORE

• Main Authors: KOIZUMI ATSUHIKO, KONISHI TADAO, ODAKAWA NAOTO
• Format: Patent
• Language: English
• Published: 17.01.2013
• Subjects: NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS

PROBLEM TO BE SOLVED: To reduce time required for completing a scan of a detector as a whole and to allow starting time of a reactor to be reduced.SOLUTION: A detection sensitivity calibration system of a TIP device 40 for calibrating detection sensitivity of a plurality of TIP detectors 5 includes: a single TIP detection sensitivity calibration radiation source 41 that can individually insert the plurality of TIP detectors 5 and emits neutrons; a TIP driving device 8 that inserts a predetermined TIP detector 5 in a guiding tube 4 of a predetermined LPRM string 11 and the single TIP detection sensitivity calibration radiation source 41; a process computer 6 that stores measured value data from the plurality of TIP detectors 5, calculates a detection sensitivity calibration coefficient of each of the plurality of TIP detectors 5 from the measured value data when the predetermined TIP detector 5 is inserted in the single TIP detection sensitivity calibration radiation source 41 and calibrates the detection sensitivity of each of the TIP detectors 5 while outputting a driving signal for causing the predetermined TIP detector 5 to be inserted in the guiding tube 4 of the predetermined LPRM string 11 and the single TIP detection sensitivity calibration radiation source 41 to the TIP driving device 8; and the like.