So Kamada

TL;DR: The fourth version of the Japanese Evaluated Nuclear Data Library has been produced in cooperation with the Japanese Nuclear Data Committee as mentioned in this paper, and much emphasis is placed on the improvement of the original library.

TL;DR: In this article, an integrated system that includes both radiation detectors and sonar will allow the full localization and characterization of the fuel debris, which will enable increased efficiency and reduce risk during the decommissioning of the site.

Abstract: Neutron response functions of a phoswich neutron detector and thin organic liquid scintillator were simulated using the multi-purpose Monte Carlo code MCNPX, incorporating functions of light outputs, energy resolutions, and uniformity of scintillation. The simulated response functions were verified by response-function measurement for high-energy neutrons produced by bombarding thin lithium targets with 10to 80-MeV protons. Our procedures can simulate the response functions of the organic liquid scintillator and the phoswich neutron detector without limits of neutron energies, materials, or geometries. Based on the evaluated neutron response functions, we obtained neutron energy spectra using an unfolding method. One is the high-energy neutron spectrum at the aviation altitude, 10.8 km, and the other is at an intense fast neutron field for biological study in the National Institute of Radiological Sciences.

TL;DR: In this paper, a method to predict the dose rate distribution in a primary containment vessel of Unit 1 of the Fukushima Daiichi Nuclear Power Station (1F) using numerical calculations and measured data was proposed.

TL;DR: The development and experimental verification of a localization system for an underwater robot, which enabled the collection of sonar data to create 3D images of submerged simulated fuel debris, was described and demonstrated.