Hasil Pencarian  ::  Simpan CSV :: Kembali

"Using the quantum approaching, the nuclear control rod wing shape optimization method based ancontrol theory in nuclear structure have been intensively developed especially in Canadian DeuteriumUranium (CANDU) nuclear research reactor. The control rod blade dimensions include 5 meters length, 0.80meters diameter, and 0. ll) meters thickness and it has the wing for thermal neutron reaction controlling at theCerenkov's radiation coming up. Moving on normally with 76 mm/second velocity. The floating of U particlein 2. l .r l05 currie/mm thermal neutron flux is one problem in nuclear control rod wing manufacturing. Basedon quantum approaching in transuranium nuclear chain control theory, the structural and thermal neutronflux flow is the best optimization technique for 450 tesla magnetic field weight and 45.7 MW adjusted power.This research purposed for new shape of nuclear control rod wing by several mathematical formulations havebeen modeled by Euler equations and build the miniature of control rod wing, then the angle has expectedaround 37.6° until 421° based on Sr20 matrix as the primer material and DUO; loading is the nuclearchamber:"

"The functional of control rod blade nuclear reactor is stabilized device and controlling for nuclear chain reaction also the flux of thermal neutron in reactor chamber. Selecting materials based on Sr2 AI,;OV for multipurpose research reactor 50 megawatts determined by Ising Model software and programming written in Modula's language. This software consists are 4 main programmes and 38,700 sub-programmes. By simulation of Ising Model found Sr2 A1202, material. Based on Sr2 AI202_7, had been tested by Magnetic Stirrer equipment and combined with Ising Model expressed the material is Sr2 A12O1.8 . This material shown the strength of thermal neutron flux absorbed about 2.1 x 105 - 1.8 x 106 currie/mm. The values of Electrical Conductivity is 26.62 - 29.98 in 800° - 890° C temperature, however at 2.1 x 10' currielmmn thermal neutron flux condition is 29.44 -- 37.98 values in IAEA standard. At 450 testa magnetic field and 2.1 x 105 currie/mm thermal neutron absorber, the crystallization structure reduction is 6.88% until 10.95% for 25 years period in 45.7 megawatts. At present material is Zr-4 was substituted by this material, however the cost more cheaper than Zr-4. According datas, then the manufacturing design for control rod blade is investment casting and adhesive bounding with Sr2O2 substance for lining substance processes, compare with present material is casting and welding processes. The value of cubical raiser with sides 1.25 cm has the AIIV ratio as 4.8 cm' l (in standard is 4.1 cnf-') with the volume shrinkage of solidification is 3% for casting process. At joining has the radial tensile stress at the front hub fillet measuring 222 N/mm2 (in standard is 180 NImm2) and the value of tensile test is 405 MPa, meanwhile the standard around 390 MPa."

"Di era dengan ketersediaan bahan bakar fosil yang semakin rendah, diperlukan sumber energi terbarukan. Salah satu pembangkit dengan efisiensi optimal adalah pembangkit listrik tenaga nuklir. Badan Energi Atom Jepang (JAEA) memulai proyek HTTR pada tahun 1985 dengan inti prismatik, moderator grafit, dan reaktor berpendingin gas helium. Model matematis dan parameter merupakan acuan yang penting digunakan untuk melakukan suatu desain pengendali. Model kinetik reaktor nuklir yang digunakan terdiri dari model point kinetics, model thermal hydraulic, dan model reaktivitas masukan dan umpan balik ke model point kinetics. Beberapa parameter model pada reaktor nuklir sering kali tidak diketahui, oleh karena itu dilakukan estimasi model parameter menggunakan metode curve fitting nonlinear least squares. Didapatkan model yang telah dioptimasi dengan nilai akurasi dari hasil pada tingkat daya 9, 15 dan 18 MW berturut-turut yaitu sebesar 98.85%, 94.60% dan 97.95% dengan nilai RMSE masing-masing sebesar 0.0778, 0.2366 dan 0.1469. Sudah banyak sekali peneliti yang mengembangkan metode kendali untuk reaktor nuklir. Pada penelitian ini digunakan metode kendali terbaru yaitu Linear Parameter Varying Model Predictive Control (LPV-MPC). Kelebihan pada metode LPV-MPC yaitu model nonlinear dapat dibentuk dari model linear dan nonlinear dengan parameter yang bersifat varying tanpa harus menggunakan linearisasi.

---

In an era where the availability of fossil fuels is getting lower, renewable energy sources are needed. One of the plants with optimal efficiency is a nuclear power plant. The Japan Atomic Energy Agency (JAEA) started the HTTR project in 1985 with a prismatic core, graphite moderator, and a helium gas-cooled reactor. Mathematical models and parameters are important references used to carry out a controller design. The nuclear reactor kinetic model consists of a point kinetics model, a thermal hydraulic model, and an input reactivity model and feedback to the point kinetics model. Some model parameters in nuclear reactors are often unknown, therefore the parameter model estimation is carried out using the nonlinear least squares curve fitting method. The model has been optimized with accuracy values from the results at power levels of 9, 15 and 18 MW, respectively, 98.85%, 94.60% and 97.95% with RMSE values of 0.0778, 0.2366 and 0.1469, respectively. Many researchers have developed control methods for nuclear reactors. In this study, the latest control method is used, namely Linear Parameter Varying Model Predictive Control (LPV-MPC). The advantage of the LPV-MPC method is that nonlinear models can be formed from linear and nonlinear models with varying parameters without having to use linearization.

"