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[en] It is essential to input patients external contour in 3D treatment plan. We would like to see changes in depth and dose when 3D RTP is operating auto contouring when windows value (Width/Level) differs in this process. We have analyzed the results with 3D RTP after CT Scanning with round CT Phantom. We have compared and analyzed MU values according to depth changes to Isocenter changing external contour and inputting random Window value. We have watched change values according to dose optimization in 4 directions(LAO, LPO, RAO, RPO), We plan 100 case for exact analyzation. We have results changing window value random to each beam in 100 cans. It showed change between minimum and maximum value in 4 beam is Depth 0.26 mm, MU 1.2% in LAO. It showed LPO-Depth 0.13 mm, MU 0.9%, RAO-Depth 0.2 mm MU 0.8%, RPO-Depth 0.27 mm, MU 1.1%. Maximum change in depth 0.27 mm, MU error rate is according to Window change. As we can see in these results, it seems Window value change doesn't effect in treatment. However, it seems there needs to select appropriate Window value in precise treatment.
[en] Heat analysis of tritium storage vessel was accomplished to verify the integrity of vessel at high temperature condition. Now a days, metal hydride is a well established technology for tritium storage and is widely used in the world. Metal hydride (tritide) is an exothermic reaction so it is possible that the temperature of inner vessel increase so high. In this study, when tritium is absorbed in metal (titanium), the temperature of storage vessel is analyzed with a computer code for heat analysis, Heating 7. Through this work, it turned out that the tritium storage vessel could keep its integrity, even though there is the change of temperature in tritium absorption step
[en] This report documents and compares key features of four zone models: CFAST, COMPBRN IIIE, MAGIC and the Fire Induced Vulnerability Evaluation (FIVE) methodology. CFAST and MAGIC handle multi-compartment, multi-fire problems, using many equations; COMPBRN and FIVE handle single compartment, single fire source problems, using simpler equation. The increased rigor of the formulation of CFAST and MAGIC does not mean that these codes are more accurate in every domain; for instance, the FIVE methodology uses a single zone approximation with a plume/ceiling jet sublayer, while the other models use a two-zone treatment without a plume/ceiling jet sublayer. Comparisons with enclosure fire data indicate that inclusion of plume/ceiling jet sublayer temperatures is more conservative, and generally more accurate than neglecting them. Adding a plume/ceiling jet sublayer to the two-zone models should be relatively straightforward, but it has not been done yet for any of the two-zone models. Such an improvement is in progress for MAGIC
[en] A method that enables determination of maximum amplitudes of standing vibration waves, off-horizontal angles of the conductors, moments of resistance, and cutting forces in any cross section of any type of conductor and connector with the help of 'SVT-connector' software is described. Comparative values of the mentioned parameters at the outlet of the conductor from rigid dress and at the inlet to the connector are presented
[en] This paper introduces the software design specification and analysis technique for the safety-critical system based on Programmable Logic Controller (PLC). During software development phases, the design phase should perform an important role to connect between requirements phase and implementation phase as a process of translating problem requirements into software structures. In this work, the Nuclear FBD-style Design Specification and analysis (NuFDS) approach was proposed. The NuFDS approach for nuclear Instrumentation and Control (I and C) software are suggested in a straight forward manner. It consists of four major specifications as follows; Database, Software Architecture, System Behavior, and PLC Hardware Configuration. Additionally, correctness, completeness, consistency, and traceability check techniques are also suggested for the formal design analysis in NuFDS approach. In addition, for the tool supporting, we are developing NuSDS tool based on the NuFDS approach which is a tool, especially for the software design specification in nuclear fields