AbstractThis paper describes the results of an evaluation on the safety concerns of the fuel-gas purification system (FPS), the fuel-gas isotope separation system (ISS), and the fuel-gas storage system (FSS) for the Fusion Experimental Reactor (FER). The results of this evaluation are presented as a probability-consequence plot.The primary function of the FPS is to remove impurities from the vacuum pumping system in the fuel stream. In this system, a palladium diffuser removes all of the impurities, and then the purified hydrogen isotopes are transferred to the ISS.The ISS separates the stream of mixed hydrogen isotopes into three high purity streams of D2, T2, and DT. The ISS makes the required separation by means of four interlinked cryogenic distillation columns. The FSS stores the purified fuel gas by means of metal bed absorbers.This evaluation was performed by using Probabilistic Risk Assessment (PRA). The first step of this assessment is to determine the accident initiators, which was to perform a failure mode and effects analysis (FMEA). The second step is to develop an event tree for each of the important categories of accident initiators identified; event tree analysis (ETA). The third step is fault tree analysis (FTA). Fault trees are required to determine the branching probabilities in the event trees. The fourth step is the determination of the release magnitudes. The fifth step is to assign the consequences to the accident sequences and to derive probability-consequence curves for risk comparisons.
Composite catalytic membrane reactor analysis for the water gas shift reaction in the tritium fusion fuel cycle