Corrigendum to “Effect of void fraction covariance on two-fluid model based code calculation in pipe flow” [Progress Nucl. Energy 108 (2018) 319–333]

The authors regret that the following some corrections were omitted in the published version. 
The authors would like to apologise for any inconvenience caused. 

• The second sentence of section 4.1 on page 323 should be replaced with “Figs. 4 and 5 depict the results of the test cases with target void fraction values of 0.70 and 0.50 for medium diameter pipe.”
• The last sentence of the third paragraph in section 4.1 on page 323 should be replaced with “In addition, Rouhani's model is also dependent on pipe diameter, and as can be seen from the comparison of Figs. 4 and 6, and Figs. 5 and 7, <α> for large diameter pipe tends to become smaller than the medium diameter pipe case due to the increase in C₀.”
• Equation (29) on page 324 should be replaced by: 

[Formula presented]     (29)

• The third sentence below Eq. (31) on page 325 should be replaced with “Hence, Eqs. (9) and (10) can be treated as the drift velocity for churn flow regime with considering covariance”.