Konferans 2000-2009 yılları

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https://kurumsalarsiv.tenmak.gov.tr/handle/20.500.12878/279

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Browsing Konferans 2000-2009 yılları by All Authors "Bölüm Yok"

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    Modeling of existing beam-port facility at PSU breazeale reactor by using MCNP5
    (PHYSOR 2004, 2004-04) Sarıkaya, Barış; Alim, Fatih; Ivanov, Kostadin; Ünlü, Kenan; Brenizer, Jack; Azmy, Yousry; Bölüm Yok
    The Radiation Science and Engineering Center facilities at the Pennsylvania State University (PSU) include the Penn State Breazeale Reactor, gamma irradiation facilities, and various radiation detection and measurement laboratories. Due to inherited design issues with the current arrangement of beam ports and reactor core-moderator assembly, the development of innovative experimental facilities utilizing neutron beams is extremely limited. Therefore, a new core-moderator location in PSBR pool and beam port geometry was needed to be developed. A study is underway with the support of DOE-INIE funds to examine the existing beam ports for neutron output and to investigate new moderator and beam- port designs to produce more useful neutron beams. The overall system for this study consists of two major parts, the core model and beam port model. Core calculations are performed by using a three dimensional nodal diffusion code ADMARC-H. Beam port calculations are performed with the MCNP code. An interface program has been developed at PSU to link the diffusion code to the neutron transport code. The MCNP model consists of the D2O tank, graphite reflector block, and beam port tube with their surroundings. The results of the PSU package show good agreement with the experimental data.
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    SESEE: A soft error simulation and estimation engine
    (2004 MAPLD International Conference, 2004) Degalahal, V.; Vijaykrishnan, N; Irwin, M. J.; Çetiner, S.; Alim, Fatih; Unlu, K.; Bölüm Yok
    Soft errors are radiation induced ionization events that upset the logic state of the circuit. The sources of these radiations are cosmic in origin; hence traditionally these upsets affected the space and aviation electronics. Due to technology scaling, these upsets are manifesting as errors in general off-the-shelf electronics circuits and hence a good simulation and error estimation tool is needed. In this work we present a new tool called Soft Error Simulation and Estimation Engine (SESEE). In this tool we simulate neutron induced soft error from basic principles, and use this information along with the information from circuit layout and spice-level simulation to calculate the circuit’s soft error rate (SER). Also as a case study the soft error rate of a custom SRAM array is evaluated.
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    The collaborative project on the European sodium fast reactor and its proliferation resistance evaluation
    (ENC 2012, European Nuclear Conference, 2012) Alim, Fatih; Cojazzi, G. G. M.; Renda, G.; Bölüm Yok
    The collaborative project on the sodium fast reactor (CP-ESFR) is an international project where 25 European partners develop R&D solutions for a European Sodium Fast Reactor concept. The Project is funded by the 7th EU Framework Programme and covers topics such that the fuel, the fuel element and the fuel cycle, the safety concepts, the reactor architectures and components and the balance of plant. Within the sub-project 3, dedicated to safety, a task, addresses proliferation resistance issues. In the paper some of the core features and the so called working horses, for a loop and a pool Sodium fast reactor concept are presented, by highlighting those more relevant for the proliferation resistance aspects. Some of the activities carried out in the project for its proliferation resistance evaluation are then illustrated, in particular those related to material type considerations on the possible diversion targets.