scholarly journals Novel Microbial System Developed from Low-Level Radioactive Waste Treatment Plant for Environmental Sustenance

10.5772/63323 ◽  
2016 ◽  
Author(s):  
Shaon Ray Chaudhuri ◽  
Jaweria Sharmin ◽  
Srimoyee Banerjee ◽  
U. Jayakrishnan ◽  
Amrita Saha ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Waste Treatment ◽  
Treatment Plant ◽  
Low Level ◽  
Microbial System ◽  
Waste Treatment Plant ◽  
Low Level Radioactive Waste ◽  
Radioactive Waste Treatment

Quality Assurance System for Collection and Check of Radioactive Waste

2001 ◽  
Author(s):  
Gheorghe C. Dogaru
Keyword(s):  
Quality Assurance ◽  
Radioactive Waste ◽  
Waste Treatment ◽  
Treatment Plant ◽  
Quality Assurance System ◽  
Assurance System ◽  
Waste Treatment Plant ◽  
Radioactive Sources ◽  
Radioactive Waste Treatment

Abstract A component of the quality assurance system applied at Radioactive Waste Treatment Plant refers to the collection, identification and characterisation of radioactive waste including spent sealed radioactive sources before their treatment and conditioning. One of the most important challenges to be solved is to apply this procedure to the collection and characterisation of the “historical” radioactive waste for which is not recorded and no analyse bulletin for characterisation and identification is existing. The procedure “Collection and characterization of radioactive waste” applied at the Radioactive Waste Treatment Plant is based on regulatory requirements concerning collection, characterization and identification of all radioactive materials including sealed spent radioactive sources.

Ethics of the Management of Low and Intermediate Radioactive Wastes Generated by Cernavoda NPP: A Challenge for the Romanian Specialists

2010 ◽  
Author(s):  
Gheorghe Barariu
Keyword(s):  
Radioactive Waste ◽  
Waste Treatment ◽  
Treatment Plant ◽  
Local Conditions ◽  
Waste Storage ◽  
Present Generation ◽  
Waste Treatment Plant ◽  
The One ◽  
The Impact ◽  
Radioactive Waste Treatment

This paper presents the design criteria and the prerequisites for the development of the Radioactive Waste Treatment Plant - RWTP which will comply with L/ILW Final Repository requirements to be built near Cernavoda NPP. The RWTP will be designed to satisfy the main performance objectives in accordance to IAEA recommendation and on basis of the Repository’s Waste Acceptance Criteria resulted from the local conditions. One of the most important technological aspect is related to the selection of technologies, which implies, on the one hand, the impact on present generation respectively incineration, radwaste transfer from the SS drums to CS drums, SS drums super compaction and spent filter cartridges cutting, and on the other hand, technologies that isolate for 300 years the tritium and C-14 in the Repository with impact for the next generations. The Saligny Repository will be commissioned in 2014 and in order to accept radwastes from Cernavoda NPP it is necessary that the radwastes are suitably treated for long–term radionuclides isolation. The conditions and requirements including many uncertainties and constraints reduce the possibilities to select the suitable treatment technologies for the Waste Treatment Plant designed for the radwastes generated by Cernavoda NPP, this selection being a critical case due to the limited storage capacity of existing Radioactive Waste Storage Facility. The necessary Radioactive Waste Treatment Plant implies a detailed analysis including ethical aspects of the selected technologies.

Validating CFD Models of Multiphase Mixing in the Waste Treatment Plant at the Hanford Site

2006 ◽  
Author(s):  
Brigette Rosendall ◽  
Chris Barringer ◽  
Feng Wen ◽  
Kelly J. Knight
Keyword(s):  
Radioactive Waste ◽  
Waste Treatment ◽  
Fluid Dynamic ◽  
Experimental Studies ◽  
Treatment Plant ◽  
Cfd Models ◽  
Waste Treatment Plant ◽  
Stable Glass ◽  
Treatment Facilities ◽  
Pre Treatment

The Columbia River in Washington State is threatened by the radioactive legacy of the cold war. Two hundred thousand cubic meters (fifty-three million US gallons) of radioactive waste is stored in 177 underground tanks (60% of the Nation’s radioactive waste). A vast complex of waste treatment facilities is being built to convert this waste into stable glass (vitrification). The waste in these underground tanks is a combination of sludge, slurry, and liquid. The waste will be transported to a pre-treatment facility where it will be processed before vitrification. It is necessary to keep the solids in suspension during processing. The mixing devices selected for this task are known as pulse-jet mixers (PJMs). PJMs cyclically empty and refill with the contents of the vessel to keep it mixed. The transient operation of the PJMs has been proven successful in a number of applications, but needs additional evaluation to be proven effective for the slurries and requirements at the Waste Treatment Plant (WTP). Computational fluid dynamic (CFD) models of mixing vessels have been developed to demonstrate the ability of the PJMs to meet mixing criteria. Experimental studies have been performed to validate these models. These tests show good agreement with the transient multiphase CFD models developed for this engineering challenge.

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