PRIMARY CALCULATION OF THE LINEAR HEAT RATE GENERATION OF A BWR PIN IN THE ATR B-11 POSITION

Open Access
Author:
Andrews, Nathan Christopher
Area of Honors:
Nuclear Engineering
Degree:
Bachelor of Science
Document Type:
Thesis
Thesis Supervisors:
  • Konstadin Ivanov, Thesis Supervisor
  • Kostadin Nikolov Ivanov, Thesis Supervisor
  • Arthur Thompson Motta, Honors Advisor
Keywords:
  • BWR
  • ATR
  • B-11
  • Heat
Abstract:
The goal of this project was to determine the linear heat generation rate of a boiling water reactor fuel pin placed into the Advanced Test Reactor at Idaho National Laboratory inside of a boiling water test loop. This required coupling the output of the computer codes CASMO-3 and MCNP5. First, a simulated depletion using CASMO-3 was performed to 25 GWD/MTU. The output from this was used in MCNP5 to determine the linear heat generation rate from the fuel pin. The flux in the fuel pin in the boiling water test loop was determined by comparison with a benchmark case. This flux was applied to the fuel pin in the test loop, to return the heat generation rate. The MCNP runs returned a maximum peak linear heat rate of 13.57 kW/ft for a gas gap width of 1.651 mm and a peak linear heat rate of 11.89 kW/ft for a width of .5 mm. These values are lower than the desired value of 15 kW/ft. All tests showed the desired result when diluted with He-3, dropping the power below 6 kW/ft. This demonstrated that the desired ramp testing could be performed.