Monte-Carlo investigation of radiation beam quality of the CRNA neutron irradiator for calibration purposes

Mazrou, H.; Sidahmed, Tassadit; Allab, M.

doi:10.1016/j.apradiso.2010.04.022

Cited by 7 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CLRP calibraOccupational exposure to Am-Be neutron calibration source mounted in OB26 shielding container tion facility was supported with 241 Am-Be source in 1999. The source with 185 GBq total activity of 241 Am is mounted in biological shielding of the OB26 irradiator [5], see Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Occupational exposure to Am-Be neutron calibration source mounted in OB26 shielding container

Szewczak

Jednoróg

2014

Nukleonika

View full text Add to dashboard Cite

Abstract. Laboratory for Dosimetric and Radon Instruments Calibration which is a part of Central Laboratory for Radiological Protection (CLRP) in Warsaw is equipped with 241 Am-Be neutron calibration source with activity of 185 GBq since 1999. The capsule was mounted in the OB26 type shielding container. The control room is separated from the above source by a concrete wall of 0.5 m in thickness. The calibration hall is adjacent to one side of the offi ce room. To comply with the requirements of the radiological protection system, the occupational exposure of persons that are working both in the offi ce and control room needs to be assessed. Two methods were involved for ambient dose equivalent rate determination. The active instrument measurements (AIMs) performed with the Berthold LB6411 neutron probe and the Monte Carlo simulation method (MCS) based on MCNP5 code. These estimations were completed for fi ve reference points. Additionally the  radiation component was measured by RSS131 ionisation chamber. An increased value of the ambient dose equivalent rate from neutrons was observed in two reference positions. The fi rst observation was done in the control room while the second one in the offi ce room. Expected individual dose equivalents were evaluated based on the results of the AIM and on the expected working time in particular reference points. The annual individual dose equivalent associated with calibration activities using mentioned neutron source was estimated at maximum 0.8 mSv.

show abstract

Section: Introductionmentioning

confidence: 99%