ML19312C262
| ML19312C262 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/03/1977 |
| From: | Parker W DUKE POWER CO. |
| To: | |
| References | |
| NUDOCS 7912120834 | |
| Download: ML19312C262 (1) | |
Text
M DUKE POWER COMPANY Powra Duttrixo 422 Socra Caracu Srazer, CnAntorTr. N. C. asa.sa J37C)
'O W May 3, 1977 wi w a o.
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Tt ta=ont; Asta 704 Vitt Pettectut 373+ 4 C S 3 Sten = Peoovctro Mr. Norman C. Moseley, Director U. S. Nuclear Regulatory Commission Suite 818 230 Peachtree Street, Northwest Atlanta, Georgia 30303 Re: Oconee Nuclear Station Docket Nos. 50-269, -270 -287
Dear Mr. Moseley:
Pursuant to the requirements of Oconee Nuclear Station Technical Speci-fication 6.6.2.2.c & d, this report is submitted describing a condition in which measured levels of radioactivity exceeded the control levels by greater than four times but less than ten times.
On April 18, 1977, analytical results of water samples collected from February 1 to February 28, 1977, were reviewed. Given below is a summary of the pertinent results of the radioactivity concentrations of these samples.
Sample Location Date Collected Type of Sample Activity (uCi/ml) 000.3 Bridge North of 3/1/77 Surface Water 2.5E-9 (gross beta)
Site (Control) 000.7 Hwy. 183 Bridge 2/1/77-2/28/77 Surface Water 1.7E-8 (gross beta)
Radioactivity concentrations in downstream water samples are dependent upon the corrosion and fission product concentrations in liquid effluents released from the station. For the month of February, 1977, 0.193 curies of corrosion and fission products were released from the station in liquid effluents. The average tailrace concentration was 3.65E-8 uCi/ml.
At location 000.7, Hwy. 183 Bridge, near the effluent discharge point, the gross beta activity, standardized against the beta energy of Cesium-137 should (and does) compare favorably to the average activity released from the station. Samples collected at sample location 000.7 are collec-ted from a time-averaged composite sampler mounted on the Highway 183 Bridge. Since the Keowee Hydro Station operates infrequently, the activity in this sample may routinely approach the 10CFR20 Appendix B, Table II, Column 2 value which is the maximum instantaneous concentra-tion allowed by technical specifications.
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- 31 Very truly yours,
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h William O. Parker, J.
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