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Chlorine-36 in the Snake River Plain Aquifer at the Idaho National
Engineering Laboratory: Origin and Implications
Beasley, TM | Cecil, LD | Sharma, P | Kubik, PW | Fehn, U
Ground Water GRWAAP, Vol. 31, No. 2, p 302-310, March/April 1993.
4 fig, 3 tab, 32 ref. DOE Grant No. ID- 0532-RD and NSF Grants
Nos. EAR 8803803, EAR 8916359, and PHY 8920508.
Between 1952 and 1984, low-level radioactive waste was introduced
directly int o the Snake River Plain aquifer at the Idaho National
Engineering Laboratory (INEL), Idaho Falls, Idaho. These wastes
were generated, principally, at the nuclear fuel reprocessing
facility on the site. Measurements, using accelerator mass
spectrometry (AMS) techniques, of 36Cl in monitoring and
production well waters, down-gradient from disposal wells and
seepage ponds, found easily detectable, nonhazardous
concentrations of this radionuclide from the point of injection to
the INEL southern site boundary. It is probable, therefore, that
such releases are common to all such facilities. The long
half-life of 36Cl, and the sensitivity afforded by AMS in its
detection, make it an attractive tracer for validating ground
water and atmospheric dispersion models at such facilities. At the
Idaho National Engineering Laboratory, 36Cl would appear to be an
important radionuclide for future monitoring of the movement and
dispersion of contaminated water introduced into the Snake River
Plain aquife r from past low-level radioactive waste disposal
practices at this facility. (Peters-PTT)
 Descriptors: Descriptors: *Chlorine radioisotopes | *Groundwater pollution | *Idaho | *National Engineering Laboratory | *Path of pollutants | *Radioactive tracers | *Radioactive waste disposal | *Water
pollution sources | Accelerator mass spectrometry | Aquifers | Disposal wells | Groundwater monitoring | Snake River Plain | Well
water
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