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Journal Articles

Research on factor analysis for achieving denuclearization, 2; South Africa: Denuclearization and verification methods

Kimura, Takashi; Tazaki, Makiko; Shimizu, Ryo; Tamai, Hiroshi; Nakatani, Takayoshi; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshidhingusu, p.85 - 88, 2019/11

This is the summary of research result of methods for denuclearization and IAEA verification after the denuclearization in South Africa. South Africa had developed and possessed nuclear weapons, and dismantled them including the related facilities and equipment etc. by itself secretly in the past. The method for the denuclearization and the verification is unique in the world. This report could give us the lessons to investigate how to denuclearize and to verify them.

Journal Articles

Research on factor analysis for achieving denuclearisation, 3; Denuclearisation at Libya: Process and success factors

Tamai, Hiroshi; Shimizu, Ryo; Tazaki, Makiko; Kimura, Takashi; Nakatani, Takayoshi; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshidhingusu, p.89 - 92, 2019/11

Libya's denuclearisation, named 'the Libya model', is regarded as one of good practices in cooperation of the international community and measures that have a sense of speed with the countries and institutions involved. Success factors of the denuclearisation are the Libya's relatively low technological progress despite the procurement of extensive nuclear materials and components due to the delay of detecting the nuclear programme, prompt implementation with the close collaboration of countries concerned, and Libya's cooperation facing to the economic sanctions and the regime collapse by the Iraq war. Precious lessons will be learned towards the prevention and the denuclearisation in other countries.

Journal Articles

Research on factor analysis for achieving denuclearization, 4; Iraq: Characteristics of Iraq's denuclearization

Tazaki, Makiko; Shimizu, Ryo; Kimura, Takashi; Tamai, Hiroshi; Nakatani, Takayoshi; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshidhingusu, p.93 - 96, 2019/11

Iraq, defeated by the Gulf War, had to accept denuclearization under UN Security Council Resolution (UNSCR) 687, but did not immediately and accurately report all its past nuclear activities to the IAEA. IAEA, as an internationally authorized nuclear inspection and verification organization to Iraqi denuclearization by the UNSCR 687, gradually revealed existence and the whole picture of Iraqi clandestine nuclear activities and verified destruction of weapon related facilities and equipment as well as removal of nuclear materials outside Iraq. Analyzing Iraq's characteristics of denuclearization could serve as a good reference for not only preventing nuclear weapons development but also considering their denuclearization in current and future states.

Journal Articles

Research on factor analysis for achieving denuclearization, 1; South Africa: Motivations for nuclear weapons development, incentives for denuclearization and characteristics of its denuclearization

Tazaki, Makiko; Kimura, Takashi; Shimizu, Ryo; Tamai, Hiroshi; Nakatani, Takayoshi; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshidhingusu, p.81 - 84, 2019/11

South Africa had developed, manufactured, and possessed nuclear weapons, but later dismantled them all together with related facilities and equipment. After joining Treaty on the Non-Proliferation of Nuclear Weapons as a non-nuclear weapon state and concluding a Comprehensive Safeguards Agreement with the Atomic Energy Agency (IAEA), it started peaceful use of nuclear energy. In that sense, South Africa's denuclearization is one of good examples of past denuclearization in the world, although the South Africa's specific policy of apartheid had been deeply connected with its nuclear weapons development and denuclearization. Analysing South Africa's motivations for nuclear weapons development, incentives for denuclearization, and characteristics of its denuclearization could serve as a good reference for not only preventing nuclear weapons development but also considering their denuclearization in current and future states.

Journal Articles

Research on factor analysis for achieving denuclearization, 5; Iran's nuclear program and Iran nuclear deal

Shimizu, Ryo; Kimura, Takashi; Tazaki, Makiko; Nakatani, Takayoshi; Tamai, Hiroshi; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshidhingusu, p.97 - 99, 2019/11

Despite international accusations, Iran pursued uranium enrichment capacity. But through unprecedented strong economic sanctions, Iran accepted the restrictions on uranium enrichment capacity and agreed to accept the additional protocol. Nuclear program of Iran and nuclear deal are good precedents for denuclearization that has solved peacefully through multilateral negotiations, its process and lessons are compiled.

Journal Articles

Testing enrichment meter based on nuclear resonance fluorescence

Omer, M.; Shizuma, Toshiyuki*; Hajima, Ryoichi*; Koizumi, Mitsuo

Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshidhingusu, p.59 - 62, 2019/11

Oral presentation

Machine-learning based gamma-ray spectrum analysis for initial response on nuclear security event; Development of training data set by detector simulation and usability evaluation for radioisotope identification algorism

Kimura, Yoshiki; Tsuchiya, Kenichi*

no journal, , 

A nuclear security event involving nuclear and other radioactive materials out of regulatory control (MORC) has potential severe consequence on public health, environments, economics and society. When a nuclear security event caused by MORC would be occurred, it is essential to identify the hazardous substances such as nuclear materials and radioisotopes as the initial response activity at the event scene. In this study, automated radioisotope identification algorism by Machine-Learning (ML) based gamma-ray spectrum analysis using handheld type detectors have been developed. The training data set for ML-based algorism has been developed based on detector simulation and the usability of the simulation-based data set for ML model training to perform radioisotope identification has been discussed.

Oral presentation

Report on activities related to fostering nuclear security culture in Plutonium Fuel Development Center

Suzuki, Hiromichi; Sato, Mitsuhiro; Taguchi, Yusuke; Kageyama, Tomio; Ninagawa, Junichi; Shiromo, Hideo

no journal, , 

Ensuring robust nuclear security measures are required for the facilities located Plutonium Fuel Development Center as one of licensees of nuclear facilities that have multiple category I facilities. In order to continuously ensure and strengthen nuclear security measures in those facilities, an active cultivation of nuclear security culture implemented by both entire organization and individual persons is vitally essential. Therefore, Plutonium Fuel Development Center has conducted various activities such as case-study education and training, yearly posters and patrolling the site by upper-level management that all employees hold a deep-rooted belief that there is a credible insider and outsider threat, and that nuclear security is important. These activities are conducted in order to establish the foundation of beliefs and attitudes of effective nuclear security culture. This report introduces our activities fostering nuclear security culture in Plutonium Fuel Development Center that the evaluation and the continuous improvement of bidirectional activities by both top-down from multiple management levels and bottom-up from individual employee.

Oral presentation

Effective use of inspection samples as intercomparison samples for the quality control in accountancy analysis

Okazaki, Hiro; Sumi, Mika; Kayano, Masashi; Matsuyama, Kazutomi; Suzuki, Toru; Kuhn, E.*

no journal, , 

For the effective and efficient implementation of international Safeguards, it is essential that the Operator's measurement system is maintained at a level of high quality and improved, as necessary. Besides the internal quality control, it is important to have elements of Quality Assurance (QA) in place, such as external intercomparison. However, there were no intercomparison programs with Plutonium samples available in Japan because of very few users and difficulties in the shipment of such samples from foreign laboratories. To cope with these difficult situations, intercomparison by using actual safeguards samples containing Plutonium and Uranium was started. Inspection samples are selected and prepared for shipment to the Safeguards laboratories together with other samples. Safeguards laboratories receive and analyze them as inspection samples as well as intercomparison without additional cost for analysis operation or sample transportation. The practicality and effective use of this DA intercomparison, which is operated since more than 20 years, will be explained.

Oral presentation

Development of a user-friendly interface for atmospheric dispersion database and its application for nuclear emergency preparedness; Application for optimizing measurement points for effective detection of released radioactive nuclides

El-Asaad. H.; Sagara, Hiroshi*; Han, C. Y.*; Nagai, Haruyasu

no journal, , 

A user interface has been developed using a database of atmospheric dispersion of radioactive nuclides to provide a user-friendly and quick information fetching platform for nuclear emergency preparedness. The output of the user interface comes in different forms, depending on the purpose of the user; for example, comprehensible tables highlighting important values, such as maximum dose levels, its locations and distance from source, and insightful figures of plume horizontal dispersion and distribution. This interface was applied to optimize monitoring post installations for emergency preparedness by investigating various types of plume dispersions and dose distributions.

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