ML031470209
| ML031470209 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 04/30/2003 |
| From: | FirstEnergy Nuclear Operating Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML031470209 (8) | |
Text
Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Sample Results For the routine untreated surface water samples composited weekly, the beta emitting radionu-clides had an average concentration of 2.9 pCi/L at indicator locations during 2002. Control lo-cations averaged 2.6pCi/L during this period. The average concentration of beta-emitting radionuclides in monthly summer lakewater,samples was 2.8 pCi/L at indicator and 3.1 pCi/L at control locations.
During 2002, tritium was not detected in any untreated surface water samples. Cesium-137 was not detectable in samples of untreated water above theLLD. Each month, weekly quality control samples were collected at different locations. The results of the analyses from the quality control samples were consistent with the routine samples. The average concentration of beta-emitting radionuclides detected at the QC location was 2.7 pCi/I and 2.8 pCi/I at routine locations.
Gross Beta Concentration in Untreated Surface Water 1977-2002 7
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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 13: Untreated Surface Water Locations Sample Location Number T-3 T-t T-12 T-22A T-50 T-132 T-134 T-137 T-L45 T-158 T-162 Type of Location I
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C Location Description Site boundary, 1.4 miles ESE of Station Port Clinton Water Treatment Plant, 9.5 miles SE of Station Toledo Water Treatment Plant, sample taken from intake crib, 12.6 miles NW of Station Carroll Township Water Plant, State Route 2, 2.1 miles NW of Station Erie Industrial Park, Port Clinton, 4.5 miles SE of Station Lake Erie, 1.0 miles E of Station Lake Erie, 1.4 miles NW of Station Lake Erie, 5.8 miles WNW of Station Roving Quality Control Site Lake Erie, 10.0 miles WNW of Station Lake Erie, 5.4 miles SE of Station I = ildicatoI-, C = coiltlol 61
Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Shoreline Sediment The sampling of shoreline sediments can provide an indication of the accumulation of undis-solved radionuclides which may lead to internal exposure to humans through the ingestion of fish, through resuspension into dinking water supplies, or as an external radiation source from shoreline exposure to fishermen and swimmers.
Samples of deposited sediments in water along the shore were collected at various times from three indicator sites (T-3, T-4, and T-132) and one control location (T-27). Shoreline sediment was collected with a shovel.
All samples were analyzed for gamma-emitting radionuclides.
Naturally-occuiring Potassium-40 was detected at.both control and indicator locations. Cs-137 was not detected at any locations. These results are similar to previous years.
Table 14: Shoreline Sediment Locations Sample Location Type of Number Location Location Description T-3 I
Site boundary, 1.4 miles ESE of Station T-4 I
Site boundary, 0.8 miles S of Station T-27 C
Crane Creek State Park, 5.3 miles WNW of Station T-132 I
Lake Erie, 1.0 miles E of Station I = indicator C = control 62
Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Fish Sample Fish are analyzed primarily to quantify the dietary radionuclide intake by humans, and secondar-ily to serve as indicators of radioactivity in the aquatic ecosystem. The pincipal nuclides that may be detected in fish include naturally occurring Potassium-40, as well as Cesium-137, and Strontium-90.
Depending upon the feeding habit of the species (e.g., bottom-feeder versus predator), results from sample analyses may vary.
With the aid of a local commercial fisherman, Davis-Besse routinely collects three species of fish once per year from sampling locations near the Station's liquid discharge point and more than ten miles away from the Station where fish populations would not be expected to be impacted by the Station operation. Walleye are collected because they are a popular sport fish and white perch or white bass are collected because they are an important commercial fish. Carp are collected be-cause they are bottom feeders where contaminants may settle.
The average concentration of beta-emitting radionuclides in fish was similar for indicator and control locations (3.33 pCi/g and 3.00 pCi/g wet weight, respectively). Cesium-137 was not de-tected above the LLD of <0.020 pCi/g for indicator and control locations.
No other gamma emitters were detected above their respective LLDs.
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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 15: Fish Locations Sample Location Type of Number Location T-33 I
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Location Description Lake Erie, within 5 miles radius of Station Lake Erie, greater than 10 mile radius of Station I = indicator C= control 64
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