ML20083K716

Forwards Radionuclide Concentrations in Sludge Samples from Clayton Water Treatment Plant Atlanta,Ga

ML20083K716
Person / Time
Site:	Neely Research Reactor
Issue date:	04/21/1995
From:	Adams W OAK RIDGE ASSOCIATED UNIVERSITIES
To:	Basset C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 9505150125
Download: ML20083K716 (100)

Text

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• 6 - *F ! ' ' a n 90-18 ORISE OAA RifX"12 INSTINlE FOR SCIENCE AND EDUCAIK)N April 21,1995 Mr. Craig Basset U. S. Nuclear Regulatory Commission Region II

-101 Marietta Street, Suite 2900 Atlanta, GA 30323

SUBJECT:

RADIOLOGICAL ANALYSES OF SAMPLES COLLECTED FROM TIIE CLAYTON WATER TREATMENT PLANT, ATLANTA, GEORGIA (RFTA NO. 95-18)

Dear Mr. Basset:

The Environmental Survey and Site Assessment Program (ESSAP) of the Oak Ridge Institute for Science and Education (ORISE) performed a site visit and collected four sludge samples from I the Clayton Water Treatment Plant located in Atlanta, Georgia on March 13, 1995. Per the request of the U. S. Nuclear Regulatory Commission, the two liquid sludge samples (raw sludge and digested sludge) were filtered and the dissolved and suspended solids samples were analyzed sparately. Two solid samples (feed cake and ash) were also collected. ESSAP performed the requested gamma spectrometry and Sr-90 analyses on all the samples and performed gross alpha and gross beta analyses on the liquid portions of the sludge samples. The results of the radiological analyses of the samples are presented in Table 1.

If you have any questions or comments, please contact me at (615) 576-0065 or William L.

(Jack) Beck at (615) 576-5031.

Sincerely, .

h0_8AC . v Wade C. Adams Health Physicist / Project Leader Environmental Survey and Site Assessment Program WCA:daa Attachments cc: R. Uleck, NRC/NMSS/TWFN/7F27

/ D. Tiktinsky, NRC/NMSS/TWFN/8A23 PMDA, NRC/NMSS/TWFN/8A33

! W. Beck, ORISE/ESSAP E. Abelquist, ORISE/ESSAP  ;

File /288 -i l

P. O, BOX 117, OAK RIDGE, TENNESSEE 37831 0117 l

[e [ 1$ $ $ $ 734 m

.a w m a+ Anwoied Universties for the U S Department of Energy M,

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TABLE 1 -

RADIONUCLIDE CONCENRATIONS IN SLUDGE SAMPLES '

~

FROM CLAYTON WATER TREATMENT PLANT ATLANTA, GEORGIA -

Radionuclide Concentrations Raw Sludge (pCi/L)

"f,"","# Digested Sludge (pCi/L)

Dissolved Suspended

• Dissolved Suspended

• Solid Solid Gross Alpha 5.32 i 1.336 ---* 12.69 i 2.93 - -- -

Gross Beta 13.36 i 1.57 --

70.31 3.77 -- -- -

Be-7 < 55.3 <16.2 < 96.9 125.0 23.9 5.9 i 0.6 10.9 1.1 Ga-67 < 44.9 < 10.8 < 99. I < 22.6 2.4 i 0.2 5.9 0.6 -

Sr-90 < 3.7 < 2.0 < 3.4 11.0 i 2.8 0.5 i 0.I 1.1 i 0.2 1-131 8.6 6.0 < 1.8 94.2 12.8 < 3.7 4.6 i 0.1 0.1 i 0.1 Cs-137 < 7. I <2.3 <11.6 < 4.2 0.1 i 0.1 < 0.1 Eu-155 < 15.7 < 3.8 < 23.5 12.8 7.1 0.1 0.1 <0.3 TI-201 53.2 8.9 < 2.9 < 25.7 37.8 i 4.1 8.0 i 0.2 18.I 1 0.4 Bi-214 61.5 i 19.2 7.8 i 11.9 < 30.3 141.8 15.5 < 0.2 0.6 i 0.2 Th-228 5.4 i 9.6 -2.3 5.7 11.0 i 16.0 148.1 i 8.4 0.7 i 0.1 1.2 i 0.2 Th-232 < 32.1 2.8 i 14.5 < 51.2 143.6 20.6 1.1 i 0.3 2.0 i 0.4 U-235 < 9.6 *5.5 2.6 < 13.2 *22.7 5.2 < 0.I <0.3 t,3 U-238 < 152 < 50 <209 214.5 t 83.6 0.5 1.2 < 3.9 "Except where noted by an asterick (*), the activity of the filter was subtracted from the sample. The activity of the filter was not subtracted for the U-235 concer.tration due to the minute quanity.

b Uncertainties represent the 95% confidence level, based only on counting statistics.

'A dash indicates that analysis was not performed.

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