An introduction to Spent Nuclear Fuel decay heat for Light Water Reactors: a review from the NEA WPNCS

Open Access

Table 18.

Example of VVER-1000 nuclear fuel uncertainty ranges.

No.	Parameter	Symbol	Units	Range		Type
				Negative	Positive
1	Inner diameter (only TVS-M and TVSA)	Δd_fin	mm	0	+0.2	Absolute
2	Outer diameter	Δd_fout	mm	−0.03	0	Absolute
3	Density at 20°C	Δρ_UO₂	kg/m³	−150	+150	Absolute
4	Length	L	m	n.a.	n.a.	n.a.
5	Effective full power days	$δ T_{eff}$ $\delta T_{\rm eff}$	–	−0.03	+0.03	Relative
6	Power of the most loaded FA	$δ N_{FA}$ $\delta N_{FA}$	–	−0.05	+0.05	Relative

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