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

Érica Rodrigues de Faria; Clédola Cássia Oliveira de Tello; Bruna Silveira Costa

doi:10.15392/bjrs.v7i2A.729

Authors

Érica Rodrigues de Faria Centro de Desenvolvimento da Tecnologia Nuclear
Clédola Cássia Oliveira de Tello Centro de Desenvolvimento da Tecnologia Nuclear
Bruna Silveira Costa Universidade Federal de Minas Gerais

DOI:

https://doi.org/10.15392/bjrs.v7i2A.729

Keywords:

waste, dried process, cementation, acceptance criteria, repository

Abstract

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.

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Author Biography

Érica Rodrigues de Faria, Centro de Desenvolvimento da Tecnologia Nuclear

Graduation at Chemical Engineering from Centro Universitário UNA (2015). Pos Graduation at S&T radiation, minerals and materials in progress in CDTN.

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