Performance Evaluation of Decontamination Foam Containing Mesoporous silica NPs - 18453

Conference · Sun Jul 01 04:00:00 EDT 2018

OSTI ID:22977746

Kim, Seon-Byeong; Choi, Wang-Kyu; Yoon, In-Ho; Jung, Chong-Hun; Kim, Seung-Eun; Seo, Bum-Kyoung ^[1]

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1. Korea Atomic Energy Research Institute (Korea, Republic of)

It is necessary to secure decontamination technology that is easy to apply and minimizes the generation of secondary waste for large-scale equipment and large-area decontamination, which are difficult to be applied structurally when massive repairs or the decommissioning of a nuclear facility are required. In this respect, decontamination foam has a potentially wide application in the removal of contaminants from metallic walls, overhead surfaces, and elements of complex components and facilities. The decontamination efficiency can be enhanced by improving the contact time between the chemical decontamination agents and the contaminated surface through the introduction of stabilizers into the decontamination foam. In this study, the stability of a decontamination foam containing mesoporous silica NPs as a stabilizer and the decontamination performance of radioactive isotope contaminated specimens were evaluated. A process for waste liquid treatment after foam decontamination was also proposed. Decontamination performance tests using RI contaminated specimens were carried out in a decontamination foam prepared only with a solution containing only 1 wt% EM100 surfactant, and in a decontamination foam prepared with a solution containing 1 wt% EM100 surfactant and 1 wt% of various silica NPs. The stability of the decontamination foam was increased owing to the addition of various types of silica NPs. In particular, the liquid film thickness of the decontamination foam containing mesoporous silica NPs was the largest. As a result, the decontamination coefficient for RI contaminated specimens increased as the thickness of the foam liquid film increased owing to the longer contact time between the RI contaminated specimen and the chemical decontamination agent as the thickness of the foam liquid film increased. (authors)

• Research Organization: WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
• OSTI ID: 22977746
• Report Number(s): INIS-US--20-WM-18453
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
DECOMMISSIONING
DECONTAMINATION
FOAMS
LIQUID WASTES
NANOSTRUCTURES
PERFORMANCE
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTE STORAGE
SILICA
STABILITY
STABILIZATION
SURFACE CONTAMINATION
SURFACTANTS