Radiation distribution estimation with a non-directional detector using a plane source model*. (16th February 2022)

• Record Type: Journal Article
• Authors: Chao, Ziheng; Komatsu, Ren; Woo, Hanwool; Tamura, Yusuke; Yamashita, Atsushi; Asama, Hajime
• Is Part Of: Advanced robotics. Volume 36:Number 4(2022)
• Page Start: 182
• Page End: 191
• Publication Date: 2022-02-16
• Subjects: Radiation source distribution mapping -- maximum-likelihood estimation -- non-directional detector; Robotics -- Periodicals; Robotics -- Japan -- Periodicals; Robotics; Japan; Periodicals; 629.89205
• DOI: 10.1080/01691864.2021.2016482
• Languages: English
• ISSNs: 0169-1864

Abstract

Abstract : The Fukushima Daiichi nuclear disaster occurred during the Great East Japan Earthquake. Inside the reactor, materials with high radioactivity were scattered entirely, leading to a severe condition that restricted the number of measurement spots where the detector could be used. We propose a new system based on a plane model that uses fewer measurement spots and causes fewer estimation errors. We estimated the radiation source distribution using the maximum-likelihood estimation method optimized by gradient descent. Consequently, it was found that the proposed system, showed fewer errors than the previous system with a limited number of measurement spots. GRAPHICAL ABSTRACT: UF0001