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Title: Using Monte Carlo methods to estimate occupational dosage during 225Ac production

Abstract

Since alpha emitting isotopes such as 225Ac, ideal for radiation treatment, are in short supply, the Medical Isotope Research and Production program at Brookhaven National Laboratory (BNL) is devel- oping new pathways for 225Ac production. One proposed pathway is to resurrect the EBCO cyclotron at BNL to irradiate a 226Ra target for 40 hours in a 16 MeV proton beam. Using MCNPX and CINDER software to simulate this process, we found that 1.26 Ci of 225Ac could be produced from 300 mg of 226Ra. To ensure workplace safety, we modeled the detailed geometry of lab 2-66C in Bldg. 801 and performed Monte Carlo simulations to estimate the radiation outside the lab as the irradiated sample is processed in a hot cell. We found the maximum dose outside the lab to be about 9 x 10 -5 rem/h. To reduce occupational dose, we recommend 200 thick steel shielding covering the sample insertion passage. These 225Ac production runs could help cover the EBCO cyclotron's operational costs.

Authors:
 [1];  [2]
  1. Rensselaer Polytechnic Inst., Troy, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27)
OSTI Identifier:
1466627
Report Number(s):
BNL-207965-2018-TECH; EP&S/170
TRN: US1901677
DOE Contract Number:  
SC0012704
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Niedzielski, Drake, and Yip, Kin. Using Monte Carlo methods to estimate occupational dosage during 225Ac production. United States: N. p., 2018. Web. doi:10.2172/1466627.
Niedzielski, Drake, & Yip, Kin. Using Monte Carlo methods to estimate occupational dosage during 225Ac production. United States. doi:10.2172/1466627.
Niedzielski, Drake, and Yip, Kin. Fri . "Using Monte Carlo methods to estimate occupational dosage during 225Ac production". United States. doi:10.2172/1466627. https://www.osti.gov/servlets/purl/1466627.
@article{osti_1466627,
title = {Using Monte Carlo methods to estimate occupational dosage during 225Ac production},
author = {Niedzielski, Drake and Yip, Kin},
abstractNote = {Since alpha emitting isotopes such as 225Ac, ideal for radiation treatment, are in short supply, the Medical Isotope Research and Production program at Brookhaven National Laboratory (BNL) is devel- oping new pathways for 225Ac production. One proposed pathway is to resurrect the EBCO cyclotron at BNL to irradiate a 226Ra target for 40 hours in a 16 MeV proton beam. Using MCNPX and CINDER software to simulate this process, we found that 1.26 Ci of 225Ac could be produced from 300 mg of 226Ra. To ensure workplace safety, we modeled the detailed geometry of lab 2-66C in Bldg. 801 and performed Monte Carlo simulations to estimate the radiation outside the lab as the irradiated sample is processed in a hot cell. We found the maximum dose outside the lab to be about 9 x 10-5 rem/h. To reduce occupational dose, we recommend 200 thick steel shielding covering the sample insertion passage. These 225Ac production runs could help cover the EBCO cyclotron's operational costs.},
doi = {10.2172/1466627},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}