Studies of the setting of engineered barrier configuration utilized in geologic disposal
-
- OHE Toshiaki
- Tokai University
-
- WAKASUGI Keiichiro
- Japan Atomic Energy Agency Horonobe Underground Research Center
Bibliographic Information
- Other Title
-
- 地層処分人工バリアの設定値に関する考察
- 地層処分人工バリアの設定値に関する考察 ガラス固化体の溶解寿命
- チソウ ショブン ジンコウ バリア ノ セッテイチ ニ カンスル コウサツ ガラスコカタイ ノ ヨウカイ ジュミョウ
- (1)ガラス固化体の溶解寿命
- (1)Dissolution life-time of vitrified waste glass
Search this article
Description
<p> The report estimates the life-time of the waste glass dissolution in the geologic disposal environment. The overall safety report on the geologic disposal in Japan showed very short life-time of approximately 70,000 years under pessimistic assumptions ignoring the temperature decrease due to radioactive decay and dissolution rate reduction due to surface shrinkage. These factors are physically established phenomena and may not be excluded. The dissolution models including these factors of temperature and surface area decreases are discussed and used for re-evaluation. Three fracture models are presented for evaluating the surface area decreases; a single plate, monotonic spheres, spheres having power-law size distribution. All models have the same initial volume as the waste glass block for mass conservation and the total surface areas are 10 times higher than the initial pristine block because of the fracture development during production. The results indicate the retention time of 50% of initial mass exceed 70,000 years even by different fracture models and the dissolution life-times are expected for 170,000~700,000 years depending on models. These results imply more strong isolation capability of the waste glass than that estimated in the overall safety report.</p>
Journal
-
- Journal of Nuclear Fuel Cycle and Environment
-
Journal of Nuclear Fuel Cycle and Environment 24 (1), 27-32, 2017
Division of Nuclear Fuel Cycle and Environment, Atomic Energy Society of Japan
- Tweet
Details 詳細情報について
-
- CRID
- 1390282680314023552
-
- NII Article ID
- 130005852405
-
- NII Book ID
- AA11891371
-
- ISSN
- 21867135
- 13434446
- 18847579
-
- NDL BIB ID
- 028849285
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed