Results 1 - 10 of 65
Results 1 - 10 of 65. Search took: 0.018 seconds
|Sort by: date | relevance|
[en] This summarizes the talk given at the LCWS 2019 conference in Sendai, Japan, on the progress of the WHIZARD event generator in terms of new physics features and technical improvements relevant for the physics programme of future lepton and especially linear colliders. It takes as a reference the version 2.8.2 released in October 2019, and also takes into account the development until version 2.8.3 to be released in February 2020.
[en] The aim of this study was to investigate differences in volume computed tomography dose index (CTDIvol) and dose-length product (DLP) values according to facility size in Japan. A questionnaire survey was sent to 3000 facilities throughout Japan. Data from each facility were collected including bed number, computed tomography (CT) scan parameters employed and the CTDIvol and/or DLP values displayed on the CT scanner during each examination. The CTDIvol and DLP for 11 adult and 6 paediatric CT examinations were surveyed. Comparison of CTDIvol and DLP values of each examination according to facility size revealed key differences in CT dose between small and large facilities. This study highlights the importance of lowering the dose of coronary artery examination with contrast agent in smaller facilities and of lowering the dose of adult and paediatric head CT without contrast agent in larger facilities. The results of this study are valid in Japan. (authors)
[en] To assess the capability of Kyoto University Research Reactor to supply the domestic needs of medical isotopes, its neutron flux has been fully characterized. The production rates of theranostics radionuclides 177Lu (from 176Lu (n, γ) 177Lu), 176Lu (n, γ) 177mLu/177Lu and 176Yb (n, γ) 177Yb⟶β-(1.88hr)177Lu reactions), and 47Sc (from 46Ca (n, γ) 47Ca⟶β-(4.54d)47Sc and Ti (n, p) 47Sc) were evaluated. The activity (per gram of target) of 47Sc produced from Ti was found to be 10 times higher than that produced from Ca. Production of 177Lu from the decay of its isomer 177mLu was found to be produce less radioactive wastes than Yb route and can be used as a generator for long-time use. (author)
[en] The presence, concentration and distribution of 42 trace and ultra-trace elements in addition to rare earth elements (REE), yttrium(Y) and Thorium (Th) were analyzed using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) in different body parts and organs of Japanese quail Cotornix japonicaas a laboratory animal model. Twenty one of the investigated elements were below detection limit while the rest of the investigated elements varied in amount and distribution relative to organs and parts in which they were investigated. The existences, concentrations and distributions of thallium (Tl) and europium (Er) are recorded in a higher living species in the present work. The present work also documented the presence, concentration and distribution of Thulium (Tm) a living organism. The recorded concentrations and distributions of various elements may be related to their roles in structures and functions of organs in which they were distributed. From the present findings, a better classification of elements according to distribution and concentration levels in individual organs is recommended. It is also recommended to investigate the existence of Tm, Tl, and Er in other living species and a further investigation of the role of Tm, Tl, and Er in structure and metabolism of Cotornix japonica parts and organs in which they were detected
[en] In Japan, the clearance system, which contains (a) the clearance level of radioactive substances for release to the environment and (b) the control procedures of the Nuclear Regulation Authority, has been introduced in radioisotope handling facilities and accelerator facilities. In this regulation, the definition and the handling rules for activated materials were stated. This annex introduces several related topics of Japanese regulation and some examples of accelerator decommissioning.
[en] In July 2018, Japan adopted the 5th SEP1 (strategic energy plan) and reconfirmed its determination to achieve the 2030 energy mix underpinning Japan’s NDC (nationally determined contribution) aiming at 26% reduction from 2013 by 2030 under the Paris Agreement. In this energy mix, nuclear is to occupy 20-22% of the total power generation in 2030. In the 5th SEP, the role of nuclear was defined as “important base load power source contributing to the stability of long-term energy supply and demand structure”. Nuclear is expected to play a pivotal role for simultaneously 1) restoring energy self-sufficiency to pre-earthquake level, 2) reducing electricity cost and 3) presenting internationally comparable GHG emissions reduction target.
[en] The IAEA is helping Member States to improve the resilience of their food safety and food control systems through a Peaceful Uses Initiative (PUI) project ‘Enhancing Capacity in Member States for Rapid Response to Food Safety Incidents and Emergencies’, which is funded by the Government of Japan. The scope of the PUI project prepares Member States to respond to pandemics such as the current COVID-19 and other similar crises that may occur in the future.
[en] Challenges: • Liberalized electricity market is not conducive to nuclear with high upfront cost and regulatory uncertainties. • New commercial investment will face difficulties without policy support (e.g. Non Fossil Obligation, Zero Emissions Credit). • Private sector will be motivated to conduct high risk innovation if they have confidence that, once it proves to be successful, there will be investment opportunities in domestic and foreign markets. • Still persistent “nuclear phobia” and “anti-nuclear/pro-RE fundamentalism”. • Government is silent about replacement and new construction.
[en] The Paris Agreement, which is a new international framework for combating climate variation, has been put into effect, and the United Nations Summit has set sustainable development goals. In such way, the ideal form of energy, which is the sources of socio-economic activities, has become controversial. In association with the assessment of fusion energy introduction potential, this commentary introduces a long-term energy system analysis based on multiple socio-economic scenarios under the decarbonization scenarios that meet the maximum 2 deg C target of the Paris Agreement. (A.O.)