ML20236R628
| ML20236R628 | |
| Person / Time | |
|---|---|
| Site: | 07001113 |
| Issue date: | 11/16/1987 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20236R626 | List: |
| References | |
| 70-1113-87-12, NUDOCS 8711230392 | |
| Download: ML20236R628 (1) | |
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9 inductively-coupled plasma (ICP) spectrometer (Instruments S.A.,
Model JY38).
Concentrations ranging from approximately 1 ppb to about 10 ppm were measured using the Scintrex UA-3 Analyzer while concentrations above 10 ppm were made with the ICP Spectrometer.
The Scintrex UA-3 utilized a nitrogen laser which supplied a monochromatic ultraviolet light. Uranium atoms absorbing the laser's ultra-violet light energy emitted a green luminescence which was detected and measured by a photomultiplier (p.m.) tube.
The addition of a buffered pyro phosphate enhanced the luminescent yield of uranium by a factor of about 80.
In the ICP spectrometer, the liquid to be analyzed for uranium content was acidified, mixed with argon gas to form an aerosol, and injected into an argon plasma operating at greater than 5,000'K, where the aerosol was ionized.
As uranium ions diffused into cooler areas of the plasma, they emitted electromagnetic radiations in the ultraviolet to infrared regions of the optical spectrum. The electromagnetic radiations were analyzed and quantitatively evaluated by a scanning diffraction spectrometer. Both the Scintrex UA-3 Analyzer and the ICP Spectrometer were calibrated prior to and subsequent to each determination.
Based on the above discussions, the inspector concluded that the licensee's provisions for confirmatory measurements and quality assurance in laboratory analyses were adequate.
(Closed) 70-1113/85-05-01,IFI:
Review split sample analysis between GE and RESL.
The 1985 split sample results were discussed with licensee personnel. A discrepancy between GE and RESL results on one sample of low uranium concentration was a moot point since the licensee had recognized the basic problem with the analytical device in question and had replaced it shortly after the 1985 inspection. This matter is considered closed.
(0pened)70-1113/87-12-01,IFI:
The licensee to submit samples to compare analytical results with NRC contract lab.
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