Paralyzable and non-paralyzable dead-time corrections for the neutron detectors of the KUCA facility driven by external neutron sources. Issue 2 (1st February 2020)

• Record Type: Journal Article
• Authors: Talamo, Alberto; Gohar, Yousry; Yamanaka, Masao; Pyeon, Cheol Ho
• Is Part Of: Journal of nuclear science and technology. Volume 57:Issue 2(2020)
• Page Start: 157
• Page End: 168
• Publication Date: 2020-02-01
• Subjects: Backward extrapolation -- paralyzable -- non-paralyzable -- KUCA -- subcritical -- dead-time; Nuclear engineering -- Periodicals; Nuclear physics -- Periodicals; Nuclear energy -- Periodicals; 621.4805
• DOI: 10.1080/00223131.2019.1659875
• Languages: English
• ISSNs: 0022-3131

Abstract

ABSTRACT: This study examines dead-time corrections for the neutron detectors of the Kyoto University Critical Assembly (KUCA) driven by a stationary or pulsed external neutron sources. For the stationary (californium) external neutron source, the MCNP simulations producing the detector timestamps and the MATLAB scripts correcting for the dead-time effect have been validated with analytical formulae from literature. For the pulsed external neutron source (produced by a proton accelerator), the experimental detector timestamps have been corrected for the dead-time effect using the aforementioned MATLAB scripts utilizing the backward extrapolation method and the paralyzable or non-paralyzable dead-time model. Then, the keff obtained from the dead-time corrected timestamps has been corrected for the detector position and type. Finally, the corrected experimental keff has been compared with the one obtained from MCNP criticality simulations.