Naslov
Remediation of TENORM landfill near TPP Plomin

Autori
Lokner, Vladimir ; Schaller, Anton ; Kučar Dragičević}, Savka ; Subašić, Damir ; Marović, Gordana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings of the IRPA Regional Congress on Radiation Protection in Central Europe &#8220 ; Radiation Protection and Health&#8221 ; / Obelić, Bogomil ; Ranogajec-Komor, Maria ; Miljanić, Saveta ; Krajcar Bronić, Ines - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 2002

Skup
IRPA Regional Congress on Radiation Protection in Central Europe &#8220 ; Radiation Protection and Health&#8221 ;

Mjesto i datum
Dubrovnik, Hrvatska, 20.05.2001. - 25.05.2001

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
TENORM; coal; radioactivity; restoration

Sažetak
TPP Plomin is 125 MW coal power plant located at the end of Plomin bay in Istria region of Croatia. It started operation in 1970 using coal from local mines from nearby Rasa area. The coal is with high content of sulfur and with high radioactivity, mainly due to increased concentrations of uranium-238 and radium-226. In a vicinity of TPP Plomin slag/ash landfill was set up. Present volume of repository is 850.000 m3. Repository is placed on downstream section of the Bizac stream, along the contact zone of proluvial fan of the Boljunčica river. Bottom of the repository is numulite limestone, so characteristics of karst hydrology are present. Radioactivity of coal as well as deposited slag/ash were monitored regularly. Several in situ gamma dose rate measurements on the pile were performed also. For uranium-238 measured concentration was typically 70-2500 Bq/kg (mean value 550 Bq/kg) and for radium-226 from 90-3200 Bq/kg (mean value 800 Bq/kg). During last decade due to public concern local coal was &#8220 ; diluted&#8221 ; with imported varieties with low radioactivity contents, and recently local mines were closed and only imported coals are used. Measurements are showing that the pile is having pronouncedly uneven distribution of radioactivity concentration. There are no engineering barriers surrounding pile protecting bottom of the repository or the sides. Top of the pile is partially covered with soil and vegetation. The owner of the TPP Plomin is preparing restoration of the landfill. Our Agency prepared guidelines consulting EU directives and IAEA BSS for the restoration project since TENORM waste is not directly regulated by Croatian law. Several interventions are proposed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Javno zdravstvo i zdravstvena zaštita

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