TY - JOUR ID - 125528 TI - Investigation of the water to air conversion factor dependency to the spent fuel cooling time, irradiation history and burnup for gamma dose rate determination of TRR spent fuels JO - Radiation Physics and Engineering JA - RPE LA - en SN - 2645-6397 AU - Gholamzadeh, Zohreh AU - Adeli, Rohollah AU - Keivani, Mahdi AD - Reactor and Nuclear Safety Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran Y1 - 2021 PY - 2021 VL - 2 IS - 1 SP - 1 EP - 7 KW - Gamma dose rate KW - Conversion factor of air to water KW - Computational calculations KW - ORIGEN code KW - MCNPX code DO - 10.22034/rpe.2021.242746.1021 N2 - ‎Routine gamma dosimetry of spent fuels in nuclear power stations is mandatory to manage their storage in dry or wet spent fuel storages‎. ‎Mostly the spent fuel gamma dose rate measurements out of the spent fuel pool is impossible because of the high exposures of the operators‎. ‎Therefore‎, ‎determination of a conversion factor as precise as possible is important that could be applied to convert the measured gamma dose rate inside the water shield to the air values‎. ‎Simulation methods are powerfully applied to investigate the conversion factor variation trends due to different burnup‎, ‎cooling time and irradiation history of the spent fuels‎. ‎The present work uses MCNPX Monte Carlo-based code to determine the trend‎. ‎The obtained results of this computational study showed that the conversion factor would not have any dependency to the cooling times‎, ‎burnup values and irradiation history if the detector is placed at special positions in air or water environments‎. ‎Comparison of the simulation and experimental data showed an acceptable conformity‎, ‎so that the experimental verified the simulation data trend UR - https://rpe.kntu.ac.ir/article_125528.html L1 - https://rpe.kntu.ac.ir/article_125528_57f95605f50151bb0fc9b4b6673c1fc1.pdf ER -