Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Yousry Gohar Project Name: MCA_ADSS Division: NE Project title: Monte Carlo Analysis of Accelerator Driven Subcritical Systems Associated funding: National Nuclear Security Administration DOE Other Systems: The clusters of the nuclear engineering division Science: This project models and analyzes the nuclear and the reactor physics of accelerator driven systems using Monte Carlo techniques. Proton, deuteron, or electron beams with target assemblies are used to generate neutron sources for driving subcritical assemblies. Three-dimensional geometrical models hace been developed for the target and the subcritical assemblies for performing the analysis using the MCNP/MCNPX/MCB Monte Carlo computer codes. Static and dynamic analyses will be carried out to characterize the system performance and understand the governing physics. Charged particles, photons, and neutrons will be transported and energy deposition will be calculated. The obtained results will be compared with experimental measurements. Analyses will be performed to develop methodologies to determine the system subcriticality level and to develop system control methods. In addition, Transuric transmutation studies will be carried out utilizing the generated. Project description: The project investigates the physics and the characteristics of three types of accelerator driven systems. The first system uses deuteron beam with deuteron or tritium targets for generating 2.5 or 14 MeV neutrons, respectively, for driving a subcritical assembly. This system will be modeled and characterized using MCNP/MCNPX/MCB Monte Carlo transport computer codes. The intention is to understand the physics of the driven subcritical assembly, the coupling between the deuteron beam and the subcritical assembly, the dynamic behavior of the system. The analytical results will be compared with the experimental measurements for different fuel designs. Different methodologies will be developed and compared to predict the subcriticality level of the system and to control the operation of the subcritical assembly. The second system uses electron beam with high atomic number material (tungsten or uranium) for generating a neutron source for driving a subc ritical assembly. The beam power is about 100 KW and the electron energy is 100 MeV. The system power is about 300 KW. The subcritical assembly has 0.98 Keff. This facility will have a maximum neutron flux of about 4 x 10**13 n/cm**2.s. A facility configuration will be developed and analyzed. It will be investigated for producing medical isotopes, generating cold neutron source, and performing physics experiments. The third system utilizes 1 GeV proton beam with high atomic number materials (lead-bismuth Eutectic or Tungsten) to generate neutron through spallation reaction. The generated neutrons will be used for transuranic transmutation studies. MPI is used for the Monte Carlo analyses with more than 90% efficiency for up to 200 CPUs on Fusion. Six ANL members will utilize the JAZZ resources for this project. In FY12, experimental results will compared with simulation results for different subcritical assembly configurations. Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 100000 Q1: 25000 Q2: 25000 Q3: 25000 Q4: 25000 Justification: Thank You, The LCRC Accounts System