Naslov
Radioaktivne tvari u otpadu crne metalurgije
(Radioactive substances in metallurgicial waste)

Autori
Rastovčan-Mioč, Alenka ; Sofilić, Tahir ; Cerjan-Stefanović, Štefica ; Grahek, Željko ; Mioč, Boro

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova Petog simpozija Hrvatskog društva za zaštitu od zračenja / Krajcar Bronić, Ines ; Miljanić, Saveta ; Obelić, Bogomil - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 2003, 317-322

Skup
Simpozij Hrvatskog društva za zaštitu od zračenja (5 ; 2003)

Mjesto i datum
Stubičke Toplice, Hrvatska, 2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
radioaktivne tvari; metalurški otpad
(radioactive substances; metallurgical waste)

Sažetak
Modern steel making technology in electric arc furnaces today is inconceivable without the use of steel scrap.In addition to redioactive elements Cs^137 and Co^60 which have so far been found in steel scrap, polluting thus both steel and steel product, Ra^226, Ir^192, Am^241, Th^232, and Sr^90 are most represented. During the tehnological process the named radionuclides are distributed across heat, slag and dust, depending on their chemical and physical properties. Radionuclides which end up in the heat, slag, or dust, act radioactively for a long period of time, depending on the duration of semidecompostion of each single isotope. Due to the potential presence of radioactive elements in metallurgical scrap (steel scrap, EAF slag, EAF dust) and in other materials from the EAF process, the process of their identification has been initiated. Gamma-spectrometric analysis (Canberra spectrometric system with Ge-detector) was applied on samples from the steel mill at Sisak Steelworks and from the "Felis" Foundry in Sisak. The presence of natural isotopes K^40, Ra^226, Th^232 and U^238 as well as of the artifical isotope Cs^137 was established.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

POVEZANOST RADA