Community Health View
Some background is outlined to better understand the issues of radioactive water in context of nuclear
power. The pathway by which humans are harmed is when tritium becomes part of the water molecule and radiation
emits directly into our body tissues as we consume contaminated food or drink.
Rays of energy from outer space entering the earth's atmosphere cause some hydrogen atoms there to
adopt a second neutron. This isotope of hydrogen is called tritium.
According to the IATA, 1981, tritium has a radioactive half life of 12.43 years. All three isotopes of
hydrogen have a single proton in their nucleus. Atoms of protium (ordinary hydrogen) has no neutron in its
nucleus and is stable, deuterium has one neutron in its nucleus and is stable. Tritium with two neutrons in is
nucleus is unstable and ejects Beta particles (essentially high-energy electrons). Since the number of protons
determines chemical bonding, tritium behaves like ordinary hydrogen and replaces it in water molecules
producing radioactive water. Hoffman
Incorporated in water molecules in precipitation, tritium ultimately reaches the land or sea surface. From
where it readily cycles through the hydrologic and biologic components of the environment, including our
ground water aquifer reservoirs.
There are several sources of tritium in addition to the above. Since the early 1960s, when the atmospheric
testing of thermonuclear weapons raised background levels by several orders of magnitude (100 times), background levels
have receded to twice the level preceding the weapons testing period. All nuclear electric power plant
reactors emit tritium into water and the atmosphere. A Progress Energy document simply refers to the fact that
all reactors emit tritium and the EPA monitors levels. Note that background levels before the tests was 60 tritium
units - after tests it reached 640 tritium units.
The standard unit of measure, a tritium unit (TU), is a set ratio of tritium atoms to hydrogen atoms in a
substance, for example, water. In terms of radioactivity, one TU is equivalent to 3.19 picocuries per liter (Clark
and Fritz, 1997). In SI units, one tritium unit is about 0.118 bequerels per liter (Bq/L), where the bequerel
is one unit of disintegration per second. Tritium decays naturally over time to become helium.
Tritium is classified by the EPA as a human cancer causing agent. We can take this agent into our bodies by
breathing, though the pores in the skin, and by eating or drinking contaminated fluids or food. EPA sets a
fairly tight limit on drinking water under the Safe Drinking Water Act, at 740 becquerels per liter.
All living organisms can be harmed by the beta particles emitted from tritium, which can sever chemical
bonds and damage cells, affecting DNA structures and subsequent generations. Effects upon microorganisms are
probably not known. By extension, so also are consequences upon dependent ecologic systems and species, on
which our marine food web and the livelihood of so many depend. The difficulty in constructing a test
environment involving Beta radiation has led to a lack of essential documentation.
Ratios of tritium to helium in ground water can give an accurate measure of age (and possible source) of
that water. Both tritium and helium are relatively inert gases. The method separates helium derived from
tritium from helium derived from natural sources. The tritium/helium method is based on the radioactive decay
of tritium relative to helium. Both tritium and helium are relatively inert gases. Apparent age estimates from
the tritium/helium method can be extremely accurate (within months) for ground water containing high tritium
concentrations (waters recharged since 1963). Unlike the chlorofluorocarbon dating method, tritium/helium is a
valid technique for sites contaminated with organic compounds.
Use of Tritium as an aid to water age assessment — Data on natural tritium
concentrations in water in the upper part of the Floridian Aquifer were collected from December 1966 to
November 1968 to evaluate tritium as a radioactive tracer. Some useful information on recharge characteristics
In very general terms, an appreciable concentration of tritium is an indicator of young water.
The natural production rate of tritium in the atmosphere is considered constant, but nuclear weapons tests
as late as the early 1960's raised the tritium level to many times the normal level. The level declined
after the tests but has not returned to normal, estimated by L. L. Thatcher as about 6 TU along the Atlantic
Coast (Stringfield, 1966, p. 150).
During the 2-year sampling period in the Floridian Aquifer study area, one or more samples were collected
at each of 26 different observation stations. Bimonthly samples were collected and analyzed from ten of the
stations, including Rainbow and Silver Springs, Ocala Caverns, and seven wells. Samples collected irregularly
from four wells in the confined part of the aquifer, mostly in the Oklawaha River valley, contained zero to
only traces of tritium, indicating complete or nearly complete decay of originally contained tritium. This
supports interpretations from other geologic and hydrologic data that the water was old and not subject to
direct recharge. On the other hand, all samples collected west of the river valley in the unconfined part of
the aquifer had appreciable concentrations of tritium, thus supporting the belief that much of that area is
subject to direct recharge. Each of the samples had more than twice the presumed normal concentration of 6 TU
in rainfall, but far below peak concentrations measured in rainfall in Ocala in 1963 after the large
thermonuclear tests in late 1962, thus suggesting that the high concentrations in the ground water from 1963
recharge had already passed.
The weighted average tritium concentration for 1963 precipitation in Ocala was 620 TU (Stewart and
Farnsworth, 1968, p. 281). Concentrations in ground-water samples collected west of the Oklawaha valley during
the 1966-1968 sampling period ranged from 13 to 174 TU while rainfall in Ocala ranged from 20 to 158 TU. The
concentration in eleven samples collected at Rainbow Springs averaged about 49 TU with a high of 85 TU in May
1967 and a low of 38 TU in March 1968. Silver Springs water during the same period averaged about 47 TU with a
high of 150 TU in May 1967 and a low of 25 TU in July 1967. This compares with a count of only 4.2 TU in
Silver Springs water in January 1961 (Stringfield, 1966, p.150). The average concentration in the seven wells
sampled bi-monthly during 1966-68 was about 80 TU, and that in rainfall at Ocala for the same period was about
Ever since the record highs in precipitation in 1963, there has been a general decline in tritium
concentration, although seasonal peaks and troughs continue to occur as they would under normal conditions.
A similar decline apparently occurs at most ground-water observation stations. A correlation between many
of the concentration curves for the ground-water stations and the concentration curve for precipitation is
suggested. A lag of a month or two is apparent from the rainfall peaks to the peaks in several of the ground-water
curves. Correlation of the curves is very much complicated by variable recharge characteristics and by
differential rates of ground-water movement in the area. Much remains to be done to properly integrate and
fully evaluate the tritium data, but in the meantime the tritium data provide a useful tool for recognition of
some differences in recharge conditions from one place to another within the study area.
The amount of tritium estimated for the discharges from the two nuclear plants proposed for Levy County is
Nuclear Energy Electricity Generation — A Progress Energy document avers, "Tritium
is a byproduct of generating electricity at nuclear power plants. All nuclear plants release tritium into both
the water and air. The U.S. Environmental Protection Agency (EPA) regulates the acceptable level of tritium
concentrations in ground water and drinking water".
Other Progress Energy documentation indicates the intention to take between 100 and 130 million gallons of
water a day from the Cross Florida Barge Canal. Of that amount 40% (say 50 million gpd) would be emitted to
air and 60% (say 60 million gpd), at elevated temperatures, piped alongside the Barge Canal to vent to the
Gulf waters using the existing outlet from the Crystal River Energy Complex.
Both sources of discharge could carry radioactive tritium. Local precipitation would return tritium to
people, soils and ground water cumulatively every day it rains. Ejection to the Gulf waters would pollute
water at offshore sea grass meadows, with unpredictable consequences to plants and wildlife. A closed
circulation of contaminated water could be the consequence of using the Barge canal route for both inlet and
Citrus County draws its domestic drinking water supplies from wells located in the northeast part of Citrus
County. Potentiometric flows from the site proposed for the nuclear plants in Levy County, and concentration
of flows within known fracture sets would appear to imperil domestic and drinking water supplies for the
population of Citrus County.
See also the "Braidwood and Dresden Nuclear Power Plants" News
Item (March 2, 2009).
NRC review of LNP DEIS documents, Crystal River, 23 September 2010
Comments submitted to the Nuclear Regulatory Commission on behalf of the Foundation arising from the review
meeting on 23 September 2010, are reproduced below.
Tritium. Before licensing any LNP plant, the public needs to be apprised of how, in what
quantities and into which areas harmful radionuclides are to be released and accumulated in groundwater over
the operating life of the plant for both gaseous and liquid effluent pathways. Together with the calculated
dosages resulting there from, especially regarding infants fed on mother's milk.
Concern about Tritium is expressed for several reasons:
It cannot be denied that atmospheric deposits of tritium in water molecules accumulate in ground waters of
a poorly confined aquifer system. Fifty or so years ago, measured amounts of tritium in ground water near
Ocala had risen to exceed one hundred times normal background levels - due to nuclear events many thousands of
miles away on the other side of the planet,
all nuclear reactors including those proposed for Levy County and that at the CREC throughout their
operating life continually release tritium (together with several dozen other radionuclides such as strontium
and radioiodine) (Pages, J-3 and J-7)
tritium abides in water molecules as hydrogen as explained in the USNRC Tritium Backgrounder,
tritium is a radioactive isotope of hydrogen and an EPA listed human cancer causing agent, emitting Beta
particles until it degrades after about 120 years into helium,
furthermore, it is believed that the dosage models used in this DEIS only consider routine radiation
releases and fail to account for either accidental releases or tritiated water accumulations in groundwater.
Moreover calculated dosage limits also assume venting of a routine radiation release from "standard man's"
contaminated bodily fluids within a few days,
the integrity of blowdown water piping to the CR site through a single wall PVC pipe without leak detection
causes concern, especially as it will be subject to regular daily seismic disturbances from mining activities.
the statistics put forward by Mary Olson at the 23 September 2010 review meeting indicating levels of human
harm from radionuclide emissions and in high level wastes within the regulated standards were simply
staggering and quite unacceptable to civilized society.
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