Design and testing of an irradiation room with low room-scattering for neutron calibration.
Appl Radiat Isot
; 211: 111402, 2024 Sep.
Article
en En
| MEDLINE
| ID: mdl-38878557
ABSTRACT
INTRODUCTION:
This laboratory plans to establish neutron reference radiation fields with three neutron sources to calibrate neutron-measuring devices. To perform calibration at multiple dose rates, neutron ambient dose equivalent rate HË*(10) needs to range 1 µSv/h to 10 mSv/h. The lower limit requires that the maximum available calibration distance should be at least 4.5 m.METHODS:
To reduce room-scattered neutrons and extend the available calibration distance, MC simulations were conducted to determine the material and size of the irradiation room. A 3â³ Bonner sphere and a LB6411 environmental neutron dosimeter were used to characterize the irradiation room.RESULTS:
A 14.32 × 14.32 × 12.00 m3 irradiation room was built based on simulation results. Floor, roof, and walls are made of 75 cm concrete covered by a coating layer of 2 cm BPE and 3 cm PE. Experimental maximum available calibration distance reaches 4.65 m. The range of HË*(10) for calibration covers 1 µSv/h to 10 mSv/h. Neutron and photon HË*(10) outside the room are within 0.19 µSv/h and 0.22 µSv/h, respectively.
Texto completo:
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Bases de datos:
MEDLINE
Idioma:
En
Revista:
Appl Radiat Isot
Asunto de la revista:
MEDICINA NUCLEAR
/
SAUDE AMBIENTAL
Año:
2024
Tipo del documento:
Article
País de afiliación:
China