| Autor: |
Noboru Moriyama, Shigeru Dojiri, Hideo Matsuzuru |
| Rok vydání: |
1981 |
| Předmět: |
|
| Zdroj: |
Annals of Nuclear Energy. 8:363-369 |
| ISSN: |
0306-4549 |
| DOI: |
10.1016/0306-4549(81)90069-4 |
| Popis: |
The method has been developed to improve the bitumen product which incorporates an evaporator concentrate from a BWR, with respect to the swelling and leaching. The leachability of the product has been measured by the method recommended by the IAEA. The swelling of the product is successfully prevented by the addition of calcium chloride. The specimen containing the waste up to Wa/B (Weight ratio of Na 2 SO 4 + CaCl 2 and bitumen) = 60:40 shows no pronounced swelling, when it is immersed in water. The cumulative fractions of 137 Cs and 60 Co leached from a specimen which does not contain CaCl 2 are 0.65 and 0.2 at the leaching time of 30 days. On the hand, the corresponding value at 100 days for the specimen with calcium chloride addition is 5 × 10 −4 for 137 Cs and 1 × 10 −4 for 60 Co. The coating of the specimen surface with a fresh bitumen (5 mm thickness) reduces the leachability further. These results indicate that this method is effective to improve the bitumen product incorporating BWR's evaporator concentrate. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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