Immobilization of Strontium and Cesium in Intermediate-Level Liquid Wastes by Solidification in Cements

1979 ◽  
pp. 467-470 ◽  
Author(s):  
G. Rudolph ◽  
R. Köster
Keyword(s):  
Intermediate Level ◽  
Liquid Wastes

scholarly journals Establishment of cementation parameters of dried waste from evaporation coming from NPP operation

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Érica Rodrigues de Faria ◽  
Clédola Cássia Oliveira de Tello ◽  
Bruna Silveira Costa
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Scale Up ◽  
Radioactive Wastes ◽  
Intermediate Level ◽  
Drying Process ◽  
Waste Products ◽  
Liquid Wastes ◽  
To Receive

The radioactive wastes generated in Brazil are treated and sent to initial and intermediate storages. The “Project RBMN” proposes the implantation of the Brazilian repository to receive and permanently dispose the low and intermediate level radioactive wastes. The CNEN NN 6.09 standard – Acceptance Criteria for Disposal of Low and Intermediate Radioactive Wastes (LIRW) – establishes the fundamental requirements to accept the wastes packages in the repository. The evaporator concentrate is one of liquid wastes generated in a Nuclear Power Plant (NPP) operation and usually it is cemented directly inside the packing. The objective of this research is to increase the amount of the incorporated waste in each package, using the drying process before the cementation, consequently reducing the volume of the waste to be disposed.  Drying and cementation parameters were established in order to scale-up the process aiming at waste products that comply with the requirements of CNEN standard. The cementation of the resulting dry wastes was carried out with different formulations, varying the amount of cement, dry waste and water. These tests were analyzed in order to select the best products, with higher waste incorporation than current process and its complying the requirements of the standard CNEN NN 6.09. 

Design and Process Improvements on the Waste Treatment of Angra I and Angra II Power Plants in Brazil

2002 ◽  
Author(s):  
Cle´dola Ca´ssia Oliveira de Tello ◽  
Antoˆnio Carlos de Oliveira Barroso
Keyword(s):  
Power Plants ◽  
Waste Treatment ◽  
Regulatory Framework ◽  
Intermediate Level ◽  
Process Improvements ◽  
End Products ◽  
The Sixties ◽  
Liquid Wastes ◽  
In The Beginning ◽  
And Storage

Evolving differences, in Brazilian regulatory framework from the time Angra I was designed, in the beginning of the sixties, to the time of license evaluation, in the late seventies, resulted in the unacceptability of the original waste solidification system. The end products could not reach the necessary characteristics required for transport and storage and a redesign was necessary to improve the cementation process. In the case of Angra II, which uses a bituminisation system to solidify its low and intermediate level liquid wastes, some minor adjustments had to be done in the process and a new bitumen specification had to be developed to select a Brazilian material so that the system could perform adequately and meet the national requirements for safe transportation and storage.

Solidification of intermediate-level liquid wastes with the use of inorganic binders

1985 ◽  
Vol 58 (4) ◽  
pp. 282-286
Author(s):  
A. S. Polyakov ◽  
M. I. Zhikharev ◽  
K. P. Zakharova ◽  
O. M. Khimchenko ◽  
T. T. Karpova ◽  
...  
Keyword(s):  
Intermediate Level ◽  
Liquid Wastes

Incorporating Role Play In English Classes Of An Intermediate Level

2020 ◽  
Vol 02 (12) ◽  
pp. 62-65
Author(s):  
Turabova Ozoda Bokhodirovna ◽  
Keyword(s):  
Present Article ◽  
Role Play ◽  
Meaningful Use ◽  
Language Teachers ◽  
Intermediate Level ◽  
English Classes ◽  
Authentic Communication

One of the foremost responsibilities of language teachers should be not just to let students to acquire set phrases, but also to teach how to interact in a variety of situations, to develop and practice new language and behavioural skills in a relatively safe setting. In recent years, there has been a growing interest to integrate meaningful use of language and rich authentic communication in English classes. Yet, one of the universally effective methods in the classroom, which meets the demand of all above requirements, is a role play. In the present article the attempt is made to investigate the effectiveness of the role play in English classes of an intermediate level.

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