Tuning the 3D Printability and Thermomechanical Properties of Radiation Shields

Additive manufacturing, with its rapid advances in materials science, allows for researchers and companies to have the ability to create novel formulations and final parts that would have been difficult or near impossible to fabricate with traditional manufacturing methods. One such 3D printing technology, direct ink writing, is especially advantageous in fields requiring customizable parts with high amounts of functional fillers. Nuclear technology is a prime example of a field that necessitates new material design with regard to unique parts that also provide radiation shielding. Indeed, much effort has been focused on developing new rigid radiation shielding components, but DIW remains a less explored technology with a lot of potential for nuclear applications. In this study, DIW formulations that can behave as radiation shields were developed and were printed with varying amounts of porosity to tune the thermomechanical performance.

Evaluasi Implementasi Etika Proteksi Radiasi Dalam Pemanfaatan Iptek Nuklir di Indonesia

The Indonesia Government Regulation No. 33 year 2007 concerning Safety of Ionizing Radiation and Safety of Radioactive Sources, which contains the ethical basis for radiation protection nuclear applications in Indonesia, is currently in the process of being revised. Radiation safety principles that will apply are recommended and set internationally from the previous IAEA BSS-115 recommendation to its revision with IAEA GSR Part 3. The principle is strengthened from three principles into ten principles stated in the IAEA Safety Fundamental 1 document by maintaining the previous three principles. These three principles are the principle of justification of decisions to change the radiation exposure situation, applying the dose limit value for individual protection from possible unfairness of the optimization process, and the optimization principle of protection and safety. The principles are compared with the prevailing ethical views and discussed to reduce the gaps in understanding in their application. This principle is discussed in all radiation exposure situations, namely planned exposure, emergency exposure, and existing exposure concluded that by adopting an applied ethical basis in the nuclear field that agreed upon at the global level after being adequately understood and accepted at the national level, regulations would be obtained that were fair, applicable, and respected when moderating conflicts of understanding and interests of the various parties involved in implementing them on radiation safety for the actual dose and potential dose towards effective regulatory while strengthening the regulatory (nuclear) culture in Indonesia.