Electron and Beta Dose Rates of UO2 Pellet and Fuel Rod

2013 ◽  
Author(s):  
Guoqing Zhang ◽  
Xuexin Wang ◽  
Jiangang Zhang ◽  
Dajie Zhuang ◽  
Chaoduan Li ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Dose Rate ◽  
Radiation Protection ◽  
High Dose Rate ◽  
High Dose ◽  
Electron Dose ◽  
Dose Rates ◽  
Fuel Rod ◽  
Calculation Results ◽  
Beta Dose

The isotopes of uranium and their daughter nuclides inside the UO2 pellet emit mono-energetic electrons and beta rays, which generate rather high dose rate near the UO2 pellet and could cause exposure to workers. In this work calculations of electron dose rates have been carried out with Monte Carlo codes, MCNPX and Geant4, for a UO2 pellet and a fuel rod. Comparisons between calculations and measurements have been carried out to verify the calculation results. The results could be used to estimate the dose produced by electrons and beta rays, which could be used to make optimization for radiation protection purpose.

Measurements of the High Dose Rate Profiles Inside a Shutdown CANDU® Reactor

2012 ◽  
Vol 1 (1) ◽  
pp. 27-34
Author(s):  
C. Jewett ◽  
J. Chow ◽  
D. Comeau ◽  
G. Jonkmans ◽  
B. Smith ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Dose Rate ◽  
High Dose Rate ◽  
Measured Data ◽  
High Dose ◽  
Dose Rates ◽  
Diode Detector ◽  
Γ Ray ◽  
Rate Profile

The positions of the components of a reactor can change over time, due to radiation damage, sagging, etc. Thus, it is important to determine their positions. To satisfy this requirement of the staff at the Point Lepreau Generating Station, a method to determine the positions of reactor components has been developed and demonstrated. This method combines the use of dose rate measurements and Monte Carlo simulations. It first involves measuring the high γ-ray dose rates as a function of position within a reactor. Then it entails comparing these measurements with Monte Carlo simulations. In order to perform such measurements, a silicon diode detector and a scan drive system have been developed. In 2009, measurements of the γ-ray dose rate profile of the shut down Point Lepreau Generating Station reactor were conducted. By comparing the locations of the local peaks in the dose rate data, it was possible to determine the distances between the steel reactor components. The measured data were then compared with Monte Carlo simulations to determine how precisely one could locate the positions of the adjuster rods. Using this technique, it was found that the retracted adjuster rods were 440 ± 60 mm below their designed positions.

scholarly journals Erratum to: Monte Carlo dosimetry of the IRAsource high dose rate 192Ir brachytherapy source

2016 ◽  
Vol 39 (2) ◽  
pp. 591-591 ◽  
Author(s):  
Akbar Sarabiasl ◽  
Navid Ayoobian ◽  
Hossein Poorbaygi ◽  
Iraj Jabbari ◽  
Mohammad Reza Javanshir
Keyword(s):  
Monte Carlo ◽  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
Brachytherapy Source

Monte Carlo dosimetry of high dose rate gynecologic interstitial brachytherapy

2013 ◽  
Vol 109 (3) ◽  
pp. 425-429 ◽  
Author(s):  
Maxime Desbiens ◽  
Michel D’Amours ◽  
Hossein Afsharpour ◽  
Frank Verhaegen ◽  
Marie-Claude Lavallée ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Dose Rate ◽  
High Dose Rate ◽  
Interstitial Brachytherapy ◽  
High Dose

scholarly journals EP-1585: Optimization of high-dose rate photon needle parameters for topical applications, based on Monte Carlo simulation

2015 ◽  
Vol 115 ◽  
pp. S867-S868
Author(s):  
B. Zareba ◽  
K. Wincel ◽  
M. Slapa ◽  
P. Mazarewicz ◽  
A. Wysocka-Rabin
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
Topical Applications

scholarly journals Development of fast Monte Carlo code for high dose rate brachytherapy

2019 ◽  
Vol 1305 ◽  
pp. 012056
Author(s):  
Ankang Hu ◽  
Rui Qiu ◽  
Zhen Wu ◽  
Chunyan Li ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
Monte Carlo Code ◽  
High Dose Rate Brachytherapy

SU-E-T-319: Monte Carlo Characterization of a New Directional Pd-103 High Dose Rate Source for Brachytherapy Application

2012 ◽  
Vol 39 (6Part14) ◽  
pp. 3777-3777 ◽  
Author(s):  
A Heredia ◽  
A Robinson ◽  
D Henderson ◽  
B Thomadsen
Keyword(s):  
Monte Carlo ◽  
Dose Rate ◽  
High Dose Rate ◽  
High Dose

scholarly journals Fractionated versus single-dose total body irradiation at low and high dose rates to condition canine littermates for DLA-identical marrow grafts

Blood ◽  
1994 ◽  
Vol 83 (11) ◽  
pp. 3384-3389 ◽  
Author(s):  
R Storb ◽  
RF Raff ◽  
FR Appelbaum ◽  
HJ Deeg ◽  
TC Graham ◽  
...  
Keyword(s):  
Dna Repair ◽  
Single Dose ◽  
Dose Rate ◽  
Total Body Irradiation ◽  
High Dose Rate ◽  
Lymphoid Cells ◽  
High Dose ◽  
Dose Rates ◽  
Total Body ◽  
Allogeneic Marrow

Abstract We explored in dogs the immunosuppressive properties of 450 cGy total body irradiation (TBI) delivered from two opposing 60Co sources, as assessed by the criterion of successful engraftment of allogeneic genotypically DLA-identical littermate marrow. Two questions were asked in this study. Firstly, does dose rate affect the immunosuppressive effect of TBI when administered in a single dose? Secondly, does fractionation alter the immunosuppression of TBI when delivered at a very fast dose rate? Dose rates studied included 7 and 70 cGy/min, and fractionation involved four fractions of 112.5 cGy each, with 6-hour minimum interfraction intervals. Six of 7 dogs receiving 450 cGy single- dose TBI at 70 cGy/min showed sustained engraftment of the allogeneic marrow, compared with 1 of 7 dogs receiving single-dose TBI at 7 cGy/min (P = .01). Fractionated TBI at 70 cGy/min resulted in sustained allogeneic engraftment in 3 of 10 dogs, a result that was statistically significantly worse than that with single-dose TBI at 70 cGy/min (P = .03) and not statistically different (P = .24) from that with fractionated TBI delivered at 7 cGy/min (0 of 5 dogs engrafted). A single dose of 450 cGy of TBI delivered at a rate of 70 cGy/min is significantly more immunosuppressive than the same total dose delivered at 7 cGy/min. Fractionated TBI at 70 cGy/min is significantly less immunosuppressive than single-dose TBI at 70 cGy/min and not significantly different from fractionated TBI administered at 7 cGy/min. Results are consistent with the notion that significant DNA repair in lymphoid cells is possible during interfraction intervals at the relatively high dose rate of 70 cGy/min.

1389 poster MONTE CARLO SIMULATION OF A HIGH DOSE RATE GYNECOLOGICAL BRACHYTHERAPY TREATMENT TAKING INTO ACCOUNT THE HETEROGENEITY OF THE PATIENT

2011 ◽  
Vol 99 ◽  
pp. S516-S517
Author(s):  
R. Berenguer ◽  
M. Rivera ◽  
A.T. Nunez Quintanilla ◽  
V. de la Vara Olivas ◽  
M. Gutierrez ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Dose Rate ◽  
High Dose Rate ◽  
High Dose
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