次临界度 meaning in English

subcriticality

When a < 0 , move / v to the right side and look upon it as source term . the calculation result shows that the r indirect method can compute deeper than k indirect method in subcritical system . but the y indirect method has no inner iteration , it ca n ' t ensure the convergence of neutron flux and it will also fail in deep subcritical
作参数的尝试插值法把/分情况处理，当由插值法得到的新值大于零时，仍将/放在输运方程左端作为吸收项，若0 ，则将其移至右端作为源项处理计算表明，该方法比作参数的尝试插值法算得的次临界度深一些，但由于没有内迭代过程，不能保证通量收敛，在深次临界情形下同样会失效。