DNA 1240H-2 Table 17-4, Fraction of fission products, %, assigned to base surge. 48 Class of Burst Very Shallow Bhallow ¢g i 10 1 D 1 = 3 Deep 1 = 10 Very Deep For Very-Shallow and Shallow bursts, the volume for the “hollow” base-surge geometry can be expressed Vs = wz ((m - Ro) - Zeot a| (Ri + Ro) (17-9a) For Deep and Very-Deep bursts, the volume for the "solid" base eurge geometry can be expressed Zz Va = 2 3Re - 3R,Zcot a + ze cot? a] (17-96) where (see Figure 17-10) Zs height of base surge R,* outer radius of base surge R° inner radius of base surge @= interior angle between each face of the surge and the base, or water surface. 17-52