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Table 5

The IAEA recommended in-air criteria of neutron flux after passing through scheme A and scheme B.

Configuration ɸ e p i
(×109 cm–2 s–1)
ɸ t h / ɸ e p i Df / ɸ e p i
(×10–13 Gy cm2)
Dγ / ɸ e p i
(×10–13 Gy cm2)
IAEA Limits ≥ 1 ∼0.05 ≤ 2 ≤ 2
Scheme A 1.5 0.08 1.91 2.12
Scheme B 1.27 0.06 1.85 2.08

The epi/th represent the flux ratio of epithermal neutron to the thermal neutron.

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