Tellurium retention by containment spray system
Artikel i vetenskaplig tidskrift, 2021

A containment spray system is used to mitigate the source term from the containment building to the environment as part of the severe accident management actions. Tellurium is one of the volatile fission products and many of the tellurium isotopes decay into iodine, which causes a threat to the public due to its radiotoxicity and build-up in the thyroid gland. The removal efficiency of the containment spray system model against tellurium species formed under severe accident conditions was investigated with experiments and MELCOR simulations. The results indicated efficient removal of tellurium aerosols in the air atmosphere, whereas a decrease in the efficiency was observed in the nitrogen atmosphere. Gaseous tellurium species were not formed in significant amounts during the experiments and therefore, the removal efficiency due to different spray chemistry conditions could not be accurately analysed. However, the alkaline chemicals used in the spray solution seemed to form airborne particles, increasing the overall aerosol transport in the process independently of CsI or Te aerosol transport.

Tellurium

Severe accident

MELCOR

Source term

Containment spray system

Författare

T. Karkela

Teknologian Tutkimuskeskus (VTT)

Anna-Elina Pasi

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Fredrik Espegren

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Tuomo Sevón

Teknologian Tutkimuskeskus (VTT)

Unto Tapper

Teknologian Tutkimuskeskus (VTT)

Christian Ekberg

Chalmers, Kemi och kemiteknik, Energi och material

Annals of Nuclear Energy

0306-4549 (ISSN)

Vol. 164 108622

Ämneskategorier

Byggproduktion

Energisystem

Miljövetenskap

DOI

10.1016/j.anucene.2021.108622

Mer information

Senast uppdaterat

2021-08-27