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@inproceedings{upadhyay:ipac2021-tupab404,
author = {N. Upadhyay and S. Chacko and A.P. Deshpande and T.S. Dixit and P.S. Jadhav and R. Krishnan},
title = {{Monte Carlo Studies for Shielding Design for High Energy Linac for Medical Isotope Generation}},
booktitle = {Proc. IPAC'21},
pages = {2469--2471},
eid = {TUPAB404},
language = {english},
keywords = {neutron, shielding, photon, radiation, target},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-TUPAB404},
url = {https://jacow.org/ipac2021/papers/tupab404.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB404},
abstract = {{The widely used radioactive tracer Technetium-99m (99mTc) is traditionally produced from Uranium via 235U (n, f) 99Mo reactions which depends heavily on nuclear reactors. Design studies for an alternative, cleaner approach for radioisotope generation using a high energy electron linac were initiated at SAMEER to generate 99Mo. The electron beam from a 30 MeV linac with an average current of 350 µA will be bombarded on a convertor target to produce X-rays which will be bombarded on enriched 100Mo target to produce 99Mo via (g, n) reaction. 99mTc will be eluted from 99Mo. The photons and neutrons produced in the process should be shielded appropriately to ensure radiation safety. This paper brings out the use of Monte Carlo techniques for photon and neutron shielding for our application. We used FLUKA to calculate the fluence, angular distribution and dose for photons and neutrons. Then, we introduced various layers of lead followed by HDPE, 5% borated HDPE and 40% boron rubber to ensure that the proposed shielding is sufficient to completely shield the photon as well as neutron radiation and hence is safe for operation.}},
}