ML19312C293
| ML19312C293 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/28/1977 |
| From: | Parker W DUKE POWER CO. |
| To: | |
| References | |
| NUDOCS 7912120874 | |
| Download: ML19312C293 (2) | |
Text
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March 28, 1977 v.cc p.c. =c.,
c.c..e c. 4.c. 70 S? C.= P.0DwChow 3?3-4083 Mr. Narman 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 Specifica-2 tion 6.6.2.2.c and 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 March 21, 1977, analytical results of a water sample composited during the month of December, 1976 were reviewed. Given below is a summary of the pertinent resu1 ts of the radioactivity concentration of this sample.
Sample Location Date Collected Type of Sample Gross Beta uCi/ml 000.3 Bridge North 1/4/77 Surface 2.88E-9 ! 5.80E-10 of Site (Control) 000.7 Hwy. 183 Bridge 12/1/76 Surface (4x) 2. 39E-8 1.10E-9
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12/30/76 Gross beta concentrations in the water samples collected are dependent upon the corrosion and fission product concentrations in liquid effluents released from the station. For the month of December, 1976, 0.433 curies of corrosion and fission products were released from the station in liquid effluents; the maximum tailrace concentration was 1.61 x 10-6 pCi/ml; the average ta11 race concentration was 5.4 x 10-9 pCi/ml.
The station's annual objective (Technical Specification 3.9) in making effluent releases is to maintain the average concentration of corrosion and fission products in liquid effluents upon release from the Restricted Area to not more'than 2 x 10-8 pCi/ml. Technical Specification 3.9.3 specifies that the instantaneous concentration of radioactive materials released from the Restricted Area shall not exceed the concentration cLf' 0CFR20 l
Appendix B Table 2.
It can be seen that the corrosion and fission pro et average concentrations for December, 1976 in liquid effluents did no exceed the annual average objective. concentration.
2 12g f
,- e Mr. Norman C. Mocolcy Page 2 March 28, 1977 At location 000.7, Hwy. 183 Bridge, near the effluent discharge point, the gross beta activity, standardized against the beta energy of Cesiu=-137 should compare favorably to the average activity released from the station.
Samples collected at sample location 000.7 are collected 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 approach the 10CFR20 Appendix B Table II, Column 2 value which is the maximum instantaneous con-centration allowed by technical specifications.
Very truly yours, W
/
William,0. Parker, Jr.
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