Chlorine demand of Savannah River water Page: 5 of 30
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This report is a sequel to an earlier report (Wilde, 1986)
providing baseline data in support of the preliminary design
of antifouling measures for a cooling tower to dissipate
heat from the K-Reactor cooling system. It describes the
latest research from a variety of studies that have been
conducted with regard to antifouling measures for the SRS
reactor cooling water systems during the past few years
(Hollod and Wilde, 1982; Pope, et.al., 1982; Wilde, et.al.,
1983a&b; Mayack, et.al., 1984; Wilde, et.al., 1984; Soracco
et.al., 1984 & 1985).
During the spring of 1986, personnel from the Environmental
Sciences Section (ESS) of the Savannah River Laboratory
(SRL) performed several experiments involving chlorination
and dechlorination of Savannah River cooling water (Wilde,
1986). Chlorination of the influent to the cooling tower
was deemed necessary to combat possible biofouling and
dechlorination of the effluent from the tower was deemed
necessary to meet expected future NPDES limits for residual
chlorine discharges to the associated receiving stream.
The 1986 study results indicated that chlorine demand and
decay rates were similar for three different sampling dates
in the spring; however, it was recommended that additional
tests be performed to assess seasonal variability in
chlorine demand. Additional tests of chlorine demand and
residual chlorine decay rates in Savannah River cooling
water were subsequently conducted by SRL-ESS personnel at
quarterly intervals for an additional six dates. The main
purpose^ of the studies described in the present report are
to provide background data for assessing the chlorination
requirements of proposed cooling towers and other facilities
where chlorination of Savannah River water is required.
METHODS AND MATERIALS
Approximately 15 liters were collected from the K-Reactor
cooling water outfall (NPDES Outfall K-Oll) on each of the
following dates; May 16, 1986; October 13, 1986; January 12,
1987; April 6, 1987; July 20, 1987; October 12, 1987 and
February 16, 1988. K-Reactor was operating on all dates
except January 12, 1987. Water temperature was measured at
the time of collection with a mercury thermometer. All water
was collected in the morning to minimize the possibility
that samples would contain residual chlorine associated with
the routine chlorination of heat exchangers or SRS river
pumphouses which was conducted on this once-through system
in late afternoon and early evening during this study
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Wilde, E.W. Chlorine demand of Savannah River water, report, January 1, 1989; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1094127/m1/5/: accessed March 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.