Differential die-away instrument: Report on comparison of fuel assembly experiments and simulations
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Experimental results of the assay of mock-up (fresh) fuel with the differential die-away (DDA) instrument were compared to the Monte Carlo N-Particle eXtended (MCNPX) simulation results. Most principal experimental observables, the die-away time and the in tegral of the DDA signal in several time domains, have been found in good agreement with the MCNPX simulation results. The remaining discrepancies between the simulation and experimental results are likely due to small differences between the actual experimental setup and the simulated geometry, including uncertainty in the DT neutron generator yield. Within this report we also present a sensitivity study of the DDA instrument which is a complex and sensitive system and demonstrate to what degree it can be impacted by geometry, material composition, and electronics performance.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- DOE/LANL; USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1167487
- Report Number(s):
- LA-UR-15-20242
- Country of Publication:
- United States
- Language:
- English
Similar Records
Differential Die-Away Instrument: Report on Benchmark Measurements and Comparison with Simulation for the Effects of Neutron Poisons
Differential Die-Away Instrument: Report on Fuel Assembly Mock-up Measurements with Neutron Generator
Related Subjects
07 ISOTOPE AND RADIATION SOURCES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
differential die-away
fresh fuel
spent fuel
benchmark