Sensitivity Studies for the Exercise I-1 of the OECD/UAM Benchmark

Table 9

Manufacturing sensitivities on macroscopic cross-sections for TMI-1 fuel pin lattice.

Parameter	Variation	ΔΣ𝑎	ΔΣ𝑓	ΔΣ𝑠
		%	%	%
Fuel density	+0.17 g/cm^3	1.16%	−1.22%	−1.16%
Fuel pellet diameter	+0.013 mm	0.22%	−0.24%	−0.22%
Gap thickness
from outside	+0.024 mm	−0.08%	0.07%	0.08%
from inside	+0.024 mm	−0.81%	0.87%	0.81%
Clad thickness
from outside	+0.025 mm	−0.10%	0.10%	0.10%
from inside	+0.025 mm	−0.02%	0.02%	0.02%
^235U concentration	+0.00224 w/o	0.03%	−0.03%	−0.03%