Published January 2020
| Version v1
Journal article
Subcriticality from basics to applications (4). Criticality safety and subcriticality
Creators
- 1. Japan Atomic Energy Agency, Sector of Nuclear Safety Research and Emergency Preparedness, Tokai, Ibaraki (Japan)
Description
The combination of philosophy and technology to keep safety against the risk specific to the facility containing nuclear fuel materials is criticality safety. The first target of criticality safety is to keep subcriticality. Its essence is to make the subcriticality condition clear and to keep that condition. Criticality safety control utilizes the leak and absorption of neutrons. From the view point of the improvement of risk assessment, it is expected to study the relation between inhomogeneity and subcriticality condition. (author)
Abstract (Japanese)
核燃料物質を取り扱う施設特有のリスクに対して「安全」を保つための考え方や技術が「臨界安全」である。臨界安全において第一に重要なことは未臨界を保つことであり、その要点は未臨界である条件を明白にしてそれを守ることにある。そのために中性子の漏れや吸収の効果を利用して臨界安全管理を行う。今後の課題の一つとして、事故時の未臨界条件を明らかにするために、不均一な体系の物質分布の計算モデルの検討が期待される。(著者)Additional details
Additional titles
- Original title (Japanese)
- 基礎から分かる未臨界.第4回 臨界安全と未臨界
Publishing Information
- Journal Title
- Nippon Genshiryoku Gakkai-Shi (Atomos)
- Journal Volume
- 62
- Journal Issue
- 1
- Series
- 雑誌名:日本原子力学会誌
- Journal Page Range
- p. 42-46
- ISSN
- 1882-2606
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 51037471
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Descriptors DEI
- CRITICALITY; FISSION; FISSION PRODUCTS; FUEL CYCLE; MULTIPLICATION FACTORS; NEUTRON ABSORBERS; NEUTRON FLUX; NEUTRON SPECTRA; NUCLEAR MATTER; RADIATION PROTECTION; REACTIVITY WORTHS; RISK ASSESSMENT; SELLAFIELD REPROCESSING PLANT; URANYL NITRATES
- Descriptors DEC
- ACTINIDE COMPOUNDS; DIMENSIONLESS NUMBERS; FUEL REPROCESSING PLANTS; ISOTOPES; MATERIALS; MATTER; NITRATES; NITROGEN COMPOUNDS; NUCLEAR FACILITIES; NUCLEAR REACTIONS; OXYGEN COMPOUNDS; RADIATION FLUX; RADIOACTIVE MATERIALS; SPECTRA; URANIUM COMPOUNDS; URANYL COMPOUNDS
Optional Information
- Notes
- 8 refs., 5 figs.