The 0E2 benchmarks for PWR UO2 decay heat: an analysis from the NEA WPNCS

Open Access

This article has an erratum: [https://doi.org/10.1051/epjn/2026014]

Table A.2.

General information for assembly 0E2 – part 2 (cold dimensions).

Generic data	Values	References
Fuel assembly type	W 17×17	[3], page 227/253
Number of fuel rods	264	[3], page 227/253
Number of guide tubes	24	[3], page 227/253
Number of instrument tubes	1	[3], page 227/253
Initial weight of heavy metal	463.598 kg	[3], page 228/253
Average Initial enrichment wt% ²³⁴U	0.028%	See note 2
Average Initial enrichment wt% ²³⁵U	3.103%	[3], page 228/253
Average Initial enrichment wt% ²³⁸U	96.869%	[3], page 228/253 and note 2
Effective fuel (smeared) density	10.34 g/cm³	See note 3
Pellet density UO₂	10.45 g/cm³	[3], page 227/253
Density incl. chamfer, dishing, etc.	10.35 g/cm³	[3], page 227/253
Pellet diameter	8.191 mm	[3], page 227/253
Rod diameter	9.5 mm	[3], page 227/253
Rod cladding thickness	0.572 mm	[3], page 227/253
Rod cladding material	Zr4	[3], page 227/253
Guide tube material	Zr4	[3], page 227/253
Instrument tube material	Zr4	[3], page 227/253
Rod cladding temperature	600 K	See note 5
He gap temperature	600 K	See note 5
Rod cladding density	6.55 g/cm³	See note 5
He gap density	1.3 × 10⁻³ g/cm³	See note 5
Spacer Material	Inc 718	[3], page 227/253
Spacer Mass	753 g	[3], page 227/253
Outer diameter guide tube	12.24 mm	[3], page 227/253
Guide tube thickness	0.406 mm	[3], page 227/253
Outer diameter instrument tube	12.24 mm	[3], page 227/253
Instrumentation tube thickness	0.406 mm	[3], page 227/253
Rod pitch in fuel assembly	12.6 mm	[3], page 227/253
Number of spacers	8	[3], page 227/253
Burnable poison rods	No	[3], page 227/253

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