Validation of the neutron and gamma fields in the JSI TRIGA reactor using in-core fission and ionization chambers

Gašper Žerovnik; Tanja Kaiba; Vladimir Radulović; Anže Jazbec; Sebastjan Rupnik; Loïc Barbot; Damien Fourmentel; Luka Snoj

doi:10.1016/j.apradiso.2014.10.026

Validation of the neutron and gamma fields in the JSI TRIGA reactor using in-core fission and ionization chambers

Appl Radiat Isot. 2015 Feb:96:27-35. doi: 10.1016/j.apradiso.2014.10.026. Epub 2014 Nov 11.

Authors

Gašper Žerovnik¹, Tanja Kaiba², Vladimir Radulović³, Anže Jazbec⁴, Sebastjan Rupnik⁵, Loïc Barbot⁶, Damien Fourmentel⁷, Luka Snoj⁸

Affiliations

¹ Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia; Faculty of Mathematics and Physics, University of Ljubljana, Jadranska ulica 19, SI-1000 Ljubljana, Slovenia. Electronic address: gasper.zerovnik@ijs.si.
² Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: tanja.kaiba@gmail.com.
³ Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia; CEA, DEN, DER, Instrumentation, Sensors and Dosimetry Laboratory, Cadarache, F-13108 St-Paul-Lez-Durance, France. Electronic address: vladimir.radulovic@ijs.si.
⁴ Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: anze.jazbec@ijs.si.
⁵ Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: sebastjan.rupnik@ijs.si.
⁶ CEA, DEN, DER, Instrumentation, Sensors and Dosimetry Laboratory, Cadarache, F-13108 St-Paul-Lez-Durance, France. Electronic address: loic.barbot@cea.fr.
⁷ CEA, DEN, DER, Instrumentation, Sensors and Dosimetry Laboratory, Cadarache, F-13108 St-Paul-Lez-Durance, France. Electronic address: damien.fourmentel@cea.fr.
⁸ Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. Electronic address: luka.snoj@ijs.si.

PMID: 25479432
DOI: 10.1016/j.apradiso.2014.10.026

Abstract

CEA developed fission chambers and ionization chambers were utilized at the JSI TRIGA reactor to measure neutron and gamma fields. The measured axial fission rate distributions in the reactor core are generally in good agreement with the calculated values using the Monte Carlo model of the reactor thus verifying both the computational model and the fission chambers. In future, multiple absolutely calibrated fission chambers could be used for more accurate online reactor thermal power monitoring.

Keywords: Fission chamber; Ionization chamber; MCNP; Neutron flux and spectrum; Research reactor; TRIGA; Thermal power calibration.