ML20248D807
| ML20248D807 | |
| Person / Time | |
|---|---|
| Site: | Wood River Junction |
| Issue date: | 03/22/1989 |
| From: | Bidinger G NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Valasquez J UNITED NUCLEAR CORP. (SUBS. OF UNC, INC.) |
| References | |
| NUDOCS 8904120045 | |
| Download: ML20248D807 (1) | |
Text
__
Docket No;70-820 License No. SNM-777 MAR 2 21989
.e,
- UNC~ Recovery Systems ATTN:
Mr. Juan R. Valasquez, Director of Environmental Affairs Ameriwest Financial Center, Suite 1040 6501 Americas Parkway, N.E.
Albuquerque, NM 87110 Gentlemen:
We have reviewed the third and. fourth quarter groundwater results and the corrected sheets received March 6, 1989. We are concerned about the inconsis-tency in the results for well 77-B.
Both the third ard fourth quarter values l
for nitrates'and Sr-90 were very low.
These values are not consistent with the l
trend for this well.
Samples taken in July and Septtmber were 330 and 240 mg/l for nitrates and 12.5 and 12.4 pCi/l respectively for Sr-90, while those taken in November were 0.9 for nitrates and 0.5 for Sr-90.
The corrected report indicated values of 0.9 for nitrate and :10.7 for Sr-90.
The Sr-90 appears reasonable, however, the nitrate remained unchanged.
The December values were 1.2 for nitrate and 0.5 for Sr-90.
The corrected report values were in line with expected results for this well, 248 for nitrates and 17.2 for Sr-90.
UNC took a sample in February to check the low values.
These results were reason-able for Sr 90 (8.1), however, the nitrate value was still low (<0.01).
The gross beta for this well has remained around 100.
We question whether the nitrates have reached background levels in just 2 months, when the levels have been < averaging greater than 200 mg/l for over 10 years.
The changes are especially questionable because the gross beta results have remained at elevated levels.
UNC should review the procedures for nitrate and Sr-90 analyses to determine the reasons for these inconsistent results.
If historical samples are available, the analyses should be performed again.
Any changes in the above-mentioned reports should be reported to us promptly.
1 If you have any questions on this matter, please contact Ms. Merri Horn (301) 492-0606.
Sincerely, r
dinger, Sectisn Leader Uranium Fuel Section Fuel Cycle Safety Branch Division of Industrial and Medical Nuclear Safety, NMSS 0%
o cc:
gy Mr. K. A. Helgeson, Site Manager Mr. R. J. Gregg, Director Non.
UNC Recovery Systems of Technical Services I;D
$8 UNC Naval Products 1
1 0+
Distribution
> Docket:70-820 PDRL
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DATE: 3/;tN89 3/[/89 3/N/89
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