could use some technical checks

Suppose you have an object in orbit that requires a force of 0.0001356 mkg/sec2 for a full year. How much reaction mass do you need at 40,000 m/sec reaction mass velocity?
Note: the application is keeping a small space settlement (Kalpana One) in LEO without the orbit degrading.Params:Area or cross section 162.5000 m2 (250 m x 315 m cylinder in the worst attitude, the area of the thermal arrays is ignored for now)mass 1,805,500 tons (2 tons shielding per m2)altitude 700 km (circular orbit)
Note: I used http://spacience.blogspot.com/2012/03/howto-calculate-drag-in-leo-using.html for the methodology (but not the code), but using a different approach would be helpful