[填空题]
Suppose a fusion reac5nobgp ,rxoxh85 ; .wvtor ran on "d-d" reactions, Eqs. 31-8a and b. Estimate how p.bn5ohwx5 ox 8,r vg;e0t u/y+. z 5adodhbh.much uhtd. /o5+haeb yd.0 zwater, for fuel, would be needed per hour to run a 1000-MW reactor, assuming 30% efficiency. $\approx$ $kg/h$