Biocorrosion of radioactive waste glass container under environmental conditions

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Nyilvántartási szám: 
17/17
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Témavezető e-mail címe:
kopecsko.katalin@epito.bme.hu
A témavezető teljes publikációs listája az MTMT-ben:
A téma rövid leírása, a kidolgozandó feladat részletezése: 

High-level radioactive waste (HLW) requires sophisticated treatment and management to successfully isolate it from the biosphere. This usually necessitates treatment, followed by a long-term management strategy involving permanent storage, disposal or transformation of the waste into a non-toxic form of material. The radioactivity of the wastes decays with time, so high-level wastes are stored about 50 years before disposal. Storage of used fuel is normally under water for at least five years, often followed by dry storage. The isolation is provided by a combination of engineered and natural barriers. The multi-barrier concept consists of the waste packaging, the engineered repository and the geology, which all providing barriers to prevent the radionuclides from reaching humans and the environment. In addition, deep groundwater is generally devoid of oxygen.

 

HLW in deep geological formation is deposited in multi-layer containers, between 250m and 1000m under the ground, in isolated area under supervised conditions. The container has layers of steel, glass, ceramics or other materials. The long term deterioration of the waste forms and materials are extensively studied.

 

The presence of microorganisms in the storage should not be ignored. If a small number of indigenous microorganisms is present in the argillaceous sedimentary rock, an introduction microbial mass is expected during construction, excavation and operation of the storage site. These microorganisms introduced aerobic (such as Thiobacillus) or anaerobic (such as Sulphate Reducing Bacteria, SRB), able to adapt to polluted environments and can develop defences against the extreme conditions of survival in the presence of heavy metals, radioactivity, etc. Activities of different bacteria produce corrosive environment for the containment.

 

SON68 is an inactive reference nuclear waste glass. It is a High Level Long Lived nuclear Waste (HLLLW) glass, and it is expected to be disposed in a deep geological formation. This glass is poured into stainless steel containers and then placed in an overpack made of iron steel.

 

A natural corrosion is expected to be happened over this glass in unsaturated conditions upon the closure of the storage galleries during argillite host rock re-saturation in the proposed disposal site. The repository would exist 300 – 500 meters underground in an unsaturated layer where the host rock is argillite. Corrosion of nuclear waste glass in unsaturated conditions is expected to occur upon the closure of the storage galleries during argillite host rock resaturation in the proposed disposal site.

 

The objectives of the expected work are to determine the alteration kinetics of the SON68 reference waste glass in such conditions. Experiments will be conducted with small polished glass chips, involving accelerated ageing of glass due to environment provided by the microbial activity. The nature and extent of corrosion will be determined by characterizing the reacted glass surface and volume with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive x-ray spectroscopy (EDS).

A téma meghatározó irodalma: 

1. B. Côme, N. A. Chapman (1987): „Natural Analogues in Radioactive Waste Disposal”, Radioactive Waste Management Series, ISBN: 978-94-010-8051-4 (Print) 978-94-009-3465-8 (Online), p. 216.

2. Rehab O. Abdel Rahman - Ravil Z. Rakhimov - Nailia R. Rakhimova - Michael I. Ojovan (2015), „Cementitious Materials for Nuclear Waste Immobilization”. Wiley, UK., ISBN: 978-1-118-51200-5 p. 248.

3. Rachid Bouakkaz, Abdesselam Abdelouas, Yassine El Mendili, Bernd Grambow and Stephane Gin: SON68 glass alteration under Si-rich solutions at low temperature (35–90 C): kinetics, secondary phases and isotopic exchange studies, Journal of The Royal Society of Chemistry 2016, RSC Adv., 2016, 6, pp. 72616–72633

4. Kienzler, Bernhard; Altmaier, Marcus; Bube, Christiane; Metz, Volker: Radionuclide Source Term for HLW Glass, Spent Nuclear Fuel, and Compacted Hulls and End Pieces (CSD-C Waste), KIT Scientific Reports 7624,

5. Alex Cozzi,Tatsuki Ohji: Environmental Issues and Waste Management Technologies in the Material and Nuclear Industries XII, Ceramic transactions Vol. 207. 

A téma hazai és nemzetközi folyóiratai: 

1. PERIODICA POLYTECHNICA - CIVIL ENGINEERING;

2. POLLACK PERIODICA: AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES;

3. ACTA TECHNICA NAPOCENSIS - CIVIL ENGINEERING & ARCHITECTURE;

4. CONSTRUCTION AND BUILDING MATERIALS;

5. JOURNAL OF THERMAL ANALYSIS & CALORIMETRY;

6. Packaging, Transport, Storage & Security of Radioactive Material.

A témavezető utóbbi tíz évben megjelent 5 legfontosabb publikációja: 

1. Lublóy, É.; Kopecskó, K.; Balázs, L.Gy.; Restás, Á.; Szilágyi, I.M.: Impoved fire resistance by using Portland-pozzolana of Portland fly-ash cements, JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 1:(1) pp. 1-12. (2017);

 

2. Lublóy, É.; Kopecskó, K.; Balázs, G.L.; Szilágyi, M.I. and Madarász, J.: Improved fire resistance by using slag cements, Journal of Thermal Analysis & Calorimetry (2016);

 

3. Nagy G., Nagy L. and Kopecskó K.: Examination of the physico-chemcial composition of dispersive soils, PERIODICA POLYTECHNICA-CIVIL ENGINEERING, 60: (2016),

 

4. Juhász, P.; Kopecskó, K. and Suhajda, Á.: Analysis of capillary absorption properties of porous limestone material and its relation to the migration depth of bacteria in the absorbed biomineralizing compound, PERIODICA POLYTECHNICA-CIVIL ENGINEERING 58:(2) pp. 113-120. (2014),

 

5. Kopecskó K: Durability of Glass Fibres, In: di Prisco M, Felicetti R, Plizzari G A (eds.), Fibre-Reinforced Concrete, BEFIB 2004: Proceedings of the 6th RILEM Symposium on Fibre Reinforced Concrete (PRO 39).Varenna, Olaszország, 2004.09.22-2004.09.24. Kiadvány: Paris: 2004. pp. 583-592.

A témavezető fenti folyóiratokban megjelent 5 közleménye: 

1. Lublóy, É.; Kopecskó, K.; Balázs, L.Gy.; Restás, Á.; Szilágyi, I.M.: Impoved fire resistance by using Portland-pozzolana of Portland fly-ash cements, JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 1:(1) pp. 1-12. (2017);

 

2. Lublóy, É.; Kopecskó, K.; Balázs, G.L.; Szilágyi, M.I. and Madarász, J.: Improved fire resistance by using slag cements, Journal of Thermal Analysis & Calorimetry (2016);

 

3. Nagy G., Nagy L. and Kopecskó K.: Examination of the physico-chemcial composition of dispersive soils, PERIODICA POLYTECHNICA-CIVIL ENGINEERING, 60: (2016),

 

4. Juhász, P.; Kopecskó, K. and Suhajda, Á.: Analysis of capillary absorption properties of porous limestone material and its relation to the migration depth of bacteria in the absorbed biomineralizing compound, PERIODICA POLYTECHNICA-CIVIL ENGINEERING 58:(2) pp. 113-120. (2014),

 

5. Juhász, P. and Kopecskó. K.: Evaluating effect of biomineralization compounds on the surface hardness and material loss of porous limestone, POLLACK PERIODICA: AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES 8:(3) pp. 175-186. (2013) 

Hallgató: 

A témavezető eddigi doktoranduszai

Mlinárik Lilla (2012/2015/)
Juhász Péter (2010/2013/2015)
Ali AL DABBAS (2017//)
Státusz: 
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