The perception of radioactive waste as a major problem for the
industrial world has developed only recently. Four decades ago the
disposal of such waste was regarded as a relatively minor matter. Those
were the heady days when nuclear fission seemed the answer to the
world's energy needs: the two wartime bombs had demonstrated its awesome
power, and now it was to be harnessed for the production of electricity,
the excavation of canals, even the running of cars and airplanes. In all
applications of fission some waste containing radioactive elements would
be generated of course, but it seemed only a trivial annoyance, a
problem whose solution could be deferred until the more exciting
challenges of constructing reactors and devising more efficient weapons
had been mastered. So waste accumulated, some in tanks and some buried
in shallow trenches. These were recognized as only temporary, makeshift
measures, because it was known that the debris would be hazardous to its
surroundings for many thousands of years and hence that more permanent
disposal would someday be needed. The difficulty of accomplishing this
more lasting disposal only gradually became apparent. The difficulty has
been compounded by uncertainty about the physiological effects
oflow-Ievel radiation, by the inadequacy of detailed knowledge about the
behavior of engineered and geologic materials over long periods under
unusual conditions, and by the sensitization of popular fears about
radiation in all its forms following widely publicized reactor accidents
and leaks from waste storage sites.