Additive manufacturing, also known as 3D printing (3DP), is a fast growing technology in the last decades and has become the main driving force of the third industrial revolution. Rapid improvements, declining production costs, and an endless variety of options attract criminals to make use of 3DP as well. At the time this article was written, there were already a wide range of criminal uses of 3DP. Among the most worrying of its illicit uses is the creation of 3DP guns and other weapons [1,2]. One of the most famous guns produced using

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Analyses of the 1990 version of the PRISM Advanced Liquid Metal Reactor (ALMR) design are presented and discussed. Most of the calculations were performed using BNL computer codes, particularly SSC and MINET. In many cases, independent BNL calculations were compared against analyses presented by General Electric when they submitted the PRISM design revisions for evaluation by the Nuclear Regulatory Commission (NRC).The current PRISM design utilizes the metallic fuel developed by Argonne National Laboratory (ANL) which facilitates the passive/"inherent" shutdown mechanism that acts to shut down reactor power production whenever the system overheats. While most of the reactivity feedbacks are negative, and therefore tend to reduce power, the sodium density feedback is positive. Boiling of the sodium could add a significant amount of positive feedback and cause a power increase. Various postulated unscrammed events were examined by GE and/or BNL, and much of the analysis discussed in this report is focussed on this category of events.For the most part, the BNL evaluations are consistent with the analyses submitted by General Electric for PRISM. TTie principal areas of concern are related to the performance of the EM pumps and the many facets related to the ternary metal fuel. The ternary metal fuel is still being developed, and many questions regarding the ftiel may be resolved as ANL continues with its metal fuel development and testing program.