Science in Christian Perspective
Not An A voidable Problem
William G. Pollard
ORNL
From: JASA 32
(June1980): 88
Three questions may be asked about nuclear wastes: What are they? Where do they
come from? and What will we do with them? The first two questions are
adequately
answered in the preceding article by Ellen Winchester on
"Nuclear Wastes."
The third, however, is a different matter. Those whose primary
purpose is to oppose
nuclear energy approach this question in one way, while those who are neutral
or in favor of nuclear energy approach it quite differently.
There already exist in the world great quantities of high level nuclear wastes
generated in the production of nuclear weapons. Sooner or later we must dispose
of them regardless of our feelings about nuclear energy. They won't go away
simply
by wishing them out of existence. Those charged with the technical
responsibility
for the development of permanent disposal methods are convinced that it can be
done with adequate safety by deep burial (6004,000 m.) in several
geologic formations
including bedded salt, some shales, and granite. The remaining
problems are mostly
political, together with the difficulty of achieving a consensus on which among
several ceramic or glass matrices for the wastes and particular
geologic formations
are best. Sooner or later we must settle on one among these alternatives and go
ahead. It is not something we can continue to debate forever. At the same time
all of these alternatives have a miniscule probability of ever returning even
detectable radioactivities to the earth's surface and an essentially
zero probability
of returning amounts dangerous to human health. It is equally true that neither
for this problem nor any other in the life of civilized man can absolute safety
be absolutely guaranteed for all future time.
Those, however, who have little interest in contributing to this
problem but are
anxious to find telling arguments against nuclear energy take a quite different
approach. For them the object is to demonstrate that the disposal problem has
no solution. This is the case with Winchester's article, The opening sentence
of the second paragraph
sets the stage with the loaded statement, "the tragic hunt over
which human
hubris may have tripped is that nuclear waste stays poisonous
practically forever."
In fact, after 600 to 1,000 years such waste is no more "poisonous"
than natural wastes already in the earth in the form of rich uranium
ores. After
10,000 years they are less "poisonous" than was the uranium
from which
they were originally derived. These are admittedly long periods, but they are
hardly "forever." Later on after correctly characterizing the natural
radiation dose from 100 to 250 millirem per year and the additional average
medical dose as 70 millirem per year, it is stated "scientists learn more
about how unsafe even tiny increases above the background level can be."
What scientists have in fact learned is that no measurable health
effects on either
animals or man can he detected at all below 10 rads (10,000 millirem for man).
This statement stands in the face of contrary opinions later
attributed to Ralph
Nader and Alice Stewart. Several such opinions including the one
concerning uranium
mill tailings are stated without any recognition that they have been
discredited
by competent authorities. One of the most surprising statements is
that "Reactor
grade plutonium is so highly refined that one-tenth as much will do
the same"
as plutonium 239.
It is strange that the Sierra Club should have seized on radiation
and radioactivity
as the ultimate environmental catastrophe. There must be hundreds of agents in
our environment which are greater threats to human health than a radiation dose
of 250 millirem or even 1,000 millirem per year. Yet articles such
as this ask
us to do without electricity for fear of added exposures of 10
millirem per year
or less, or else force us to coal with its enormously greater real
environmental
insults. It is extraordinary to what lengths we can he driven by
irrational fear!
See Dr. Pollard's earlier article on page 70 of this issue.