Table 3.

Radiogenic neutron background contributions originating from distinct materials used in the various design options. Stated values include 1 $\sigma$ statistical uncertainties

Design option	Neutron source	Events with neutrons	Total
		entering detector volume
		(year${}^{-1}$)	(year${}^{-1}$)
Option 1	PE	$8.86\pm 0.01$	$9.17\pm 0.01$
	Cu	$(2.96\pm 0.03)·{10}^{-1}$
	Pb	$(7.41\pm 0.46)·{10}^{-3}$
	Steel	$(3.62\pm 0.34)·{10}^{-3}$
Option 2	PE	$8.91\pm 0.01$	$9.18\pm 0.01$
	Cu	$(2.67\pm 0.03)·{10}^{-1}$
	Steel	$(2.06\pm 0.24)·{10}^{-3}$
Option 3	Cu	$2.16\pm 0.01$	$2.17\pm 0.01$
	Steel	$(1.19\pm 0.06)·{10}^{-2}$
Option 4	Cu	$(8.44\pm 0.05)·{10}^{-1}$	$(9.31\pm 0.07)·{10}^{-1}$
	Steel	$(8.72\pm 0.16)·{10}^{-2}$
Option 5	Cu (cryostat)	$(2.09\pm 0.02)·{10}^{-1}$	$(4.22\pm 0.05)·{10}^{-1}$
	Steel	$(2.13\pm 0.03)·{10}^{-1}$