ML031470212

Annual Radiological Environmental Operating Report, January 1, 2002 Through December 31, 2002, Pages 68 Through 81

ML031470212
Person / Time
Site:	Davis Besse
Issue date:	04/30/2003
From:	FirstEnergy Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation
References
Download: ML031470212 (14)

Text

Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Direct Radiation Monitoring Thermoluminescent Dosimeters Radionuclides present in the air and deposited on the ground may directly irradiate individuals.

Direct radiation levels at and around Davis-Besse are constantly monitored by thermo-luminescent dosimeters (TLDs). TLDs are small devices which store radiation dose information.

The TLDs used at Davis-Besse contain a Sulfate:Dysprosium (CaSO4 :Dy) card with four main readout areas. Multiple readout areas are used to ensure the precision of the measurements.

Thermoluminescence is a process in which ionizing radiation interacts with phosphor, which is the sensitive material in the TLD. Energy is trapped in the TLD material and can be stored for several months or years. This provides an excellent method to measure the dose received over long periods of time. The energy that was stored in the TLD as a result of interaction with radia-tion is released and measured by a controlled heating process in a calibrated reading system. As the TLD is heated, the phosphor releases the stored energy in the form of light. The amount of light detected is directly proportional to the amount of radiation to which the TLD was exposed.

The reading process re-zeroes the TLD and prepares it for reuse.

TLD Collection Davis-Besse has 89 TLD locations (77 indicator and 12 control locations). TLDs are collected and replaced on a quarterly and annual basis. Eighteen QC TLDs are also collected on a this schedule. There are a total of 214 TILDs in the environment surrounding Davis-Besse. By col-lecting them on a quarterly and annual basis from a single site, each measurement serves as a quality control check on the other. Over 99% of the quarterly TLDs placed in the field and 96%

of the annual TLDs placed in the field were retrieved and evaluated during the current reporting period.

In 2002, the average dose equivalent for quarterly TLDs at all indicator locations was 15.5 mrem/91 days, and for all control locations was 15.8 mrem/91 days. The average dose equivalent for annual TLDs in 2002 was 62.5 mrem/365 days at indicator locations and 68.0 mrem/365 days for control locations.

Quality Control TLDs Duplicate TLDs have been placed at 18 sites. These TLDs were placed in the field at the same time and location as some of the routine TLDs, but were assigned quality control site numbers.

This allows us to take several measurements at the location without the laboratory being aware that they are the same. A comparison of the quality control and routine results provides a method to check the accuracy of the measurements. The average dose equivalent at the routine TLDs averaged 15.4 mrem/91 days while the quality control TLDs yielded an average dose equivalent of 14.5 mrem/91 days.

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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Direct Radiation Monitoring Gamma Dose for Environmental TLDs 1973-2002 25 20 is I.,

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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 16: Thermoluminescent Dosimeter Locations Sample Location Type of, Number Location Location Description T-1 I Site boundary, 0.6 miles ENE of Station T-2 I Site boundary, 0.9 miles E of Station T-3 I Site boundary, 1.4 miles ESE of Station T-4 I Site boundary, 0.8 miles S of Station T-5 I Site boundary, 0.5 miles W of Station T-6 I Site boundary, 0.5 miles NNE of Station T-7 I Sand Beach entrance, 0.9 miles NW of Statiom T-8 I Earl Moore Farm, 2.7 miles WSW of Station T-9 C Oak Harbor Substation, 6.8 miles SW of Station T-10 I - Site boundary, 0.5 miles SSW of Station near warehouse T-11 C

• Port Clinton Water Treatment Plant, 9.5 miles SE of Station T-12 C Toledo Water Treatment Plant, 20.7 miles WNW of Station T-24 C. Sandusky, 21.0 miles SE of Station T-27 C Crane Creek State Park, 5.3 miles WNW of Station T-38 I Site boundary, 0.6 miles ENE of Station T-39 I Site boundary 1.2 miles ENE of Station I . . .:-

T40 I Site boundary, 0.7 miles SE of Station

. , I T41 Site boundary, 0.6 miles SSE of Station I

T42 Site boundary, 0.8 miles SW of Station

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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 16: Thermoluminescent Dosimeter Locations (continued)

Sample Location Type of Number Location Location Description T-43 I Site boundary, 0.5 miles SW of Station T-44 I Site boundary, 0.5 miles WSW of Station T-45 I Site boundary, 0.5 miles WNW of Station T-46 I Site boundary, 0.5 miles NW of Station T-47 I Site boundary, 0.5 miles N of Station T-48 I Site boundary, 0.5 miles NE of Station T-49 I Site boundary, 0.5 miles NE of Station T-50 I Erie Industrial Park, Port Clinton, 4.5 miles SE of Station T-51 C on Siren Pole, 5.5 miles SSE of Station T-52 I Miller Farn, 3.7 miles S of Station T-53 I Nixon Farm, 4.5 miles S of Station T-54 I Weis Farm, 4.8 miles SW of Station T-55 I King Farm, 4.5 miles W of Station T-60 I Site boundary, 0.3 miles S of Station T-62 I Site boundary, 1.0 mile SE of Station T-65 I Site boundary, 0.3 miles E of Station T-66 I Site boundary, 0.3 miles ENE of Station T-67 I Site boundary, 0.3 miles NNW of Station T-68 I Site boundary, 0.5 miles WNW of Station T-69 I Site boundary, 0.4 miles W of Station 71

Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 16: Thermoluminescent Dosimeter Locations (continued)

Sample Location Type of Number Location Location Description T-71 I Site boundary, 0.1 mile NNW of Station T-73 I Site boundary, 0.1 mile WSW of Station T-74 I Site boundary, 0.1 mile SSW of Station T-75 I Site boundary, 0.2 mile SSE of Station T-76 I Site boundary, 0.1 mile SE of Station T-80 QC Quality Control Site T-81 QC Quality Control Site T-82 QC Quality Control Site T-83 QC Quality Control Site T-84 QC Quality Control Site T-85 QC Quality Control Site T-86 QC Quality Control Site T-88 QC Quality Control Site T-87 QC Quality Control in lead pig DBAB Annex T-89 QC Quality Control Site T-90 I Site Personnel Processing Facility T-91 I State Route 2 and Rankie Road, 2.5 miles SSE T-92 I Locust Point Road, 2.7 miles WNW of Station T-93 I Twelfth Street, Sand Beach, 0.6 miles NNE of Station T-94 I State Route 2, 1.8 miles WNW of Station T-95 C State Route 579, 9.3 miles W of Station 72

Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 16: Thermoluminescent Dosimeter Locations (continued)

Sample Location Type of Number Location Location Description T-100 C Ottawa County Highway Garage, Oak Harbor, 6.0 miles S of Station T-111 C Toussaint North Road, 8.3 miles WSW of Station T- 112 I Thompson Road, 1.5 miles SSW of Station T- 113 QC Quality Control Site T-114 QC Quality Control Site T-115 QC Quality Control Site T-116 QC Quality Control Site T- 117 QC Quality Control Site T- 118 QC Quality Control Site T-119 QC Quality Control Site T-120 QC Quality Control Site T-121 I State Route 19, 2.0 miles W of Station T- 122 I Duff Washa and Humphrey Road, 1.7 miles W of Station T-123 I Zetzer Road, 1.6 miles WSW of Station T-124 C Church and Walnut Street, Oak Harbor, 6.5 miles SSW of Station T-125 I Behlman and Bier Roads, 4.4 miles SSW of Station T-126 I Camp Perry Western and Toussaint South Road, 3.7 miles S of Station T-127 I Camp Perry Western and Rymers Road, 4.0 miles SSE of Station 73

Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report I Table 16: Thermoluminescent Dosimeter Locations (continued)

Sample Location Type of Number Location Location Description T-128 I Erie Industrial Park, Port Clinton Road, 4.0 miles SE of Station T-142 I Site Boundary, 0.8 miles SSE of Station T-150 I Humphrey and Hollywood Road, 2.1 miles NW of Station T-151 I State Route 2 and Humphrey Road, 1.8 miles WNW of Station T-153 I Leutz Road, 1.4 miles SSW of Station T-154 I State Route 2, 0.7 miles SW of Station T-155 C Fourth and Madison Streets, Port Clinton, 9.5 miles SE of Station T-200 QC Quality Control Site T-201 I Sand Beach, 1.1 miles NNW of Station T-202 I Sand Beach, 0.8 miles NNW of Station T-203 I Sand Beach, 0.7 miles N of Station T-204 I Sand Beach, 0.7 miles N of Station T-205 I Sand Beach, 0.5 miles NNE of Station T-206 I Site Boundary, 0.6 miles NW of Station T-207 I Site Boundary, 0.5 miles N of Station T-208 I Site Boundary, 0.5 miles NNE of Station.

I = Indicator C = Control QC = Quality Control 74

Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Table 16: Thermoluminescent Dosimeter Locations (continued)

Sample Location Type of Number Location Location Description T-211 I Site boundary, 0.79 miles E of Station T-212 I Site boundary, 1.2 miles ESE of Station T-213 I Site boundary, 0.6 miles SSW of Station T-214 I Site boundary, 0.7 miles SW of Station T-215 I Site boundary, 0.5 miles W of Station T-216 I Site boundary, 0.7 miles NW of station T-217 I Salem-Carroll Rd., 4.7 miles SSW of Station T-218 I Toussaint East Rd., 4.0 miles WSW of Station T-219 I Toussaint Portage Rd., 4.8 miles WSW of Station T-220 I Duff-Washa Rd., 4.8 miles W of Station T-221 C Magee Marsh, 5.1 miles WNW of Station T-222 I Turtle Creek Access, 3.7 miles WNW of Station T-223 I Lawrence Rd., 5.0 miles SE of Station T-224 I Erie Industrial Park, 4.4 miles SE of Station 75

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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report Conclusion The Radiological Environmental Monitoring Program at Davis-Besse is conducted to determine the radiological impact of the Station's operation on the environment. Radionuclide concentra-tions measured at indicator locations were compared with concentrations measured at control lo-cations in previous operational studies and in the preoperational surveillance program. These comparisons indicate normal concentrations of radioactivity in all environmental samples col-lected in 2002. Davis-Besse's operation in 2002 indicated no observable adverse radiological impact on the residents and environment surrounding the station. The results of the sample analyses performed during the period of January through December 2002 are summarized in Ap-pendix D of this report.

References

1. "Cesium-137 from the Environment to Man: Metabolism and Dose," Report No.52, National Council on Radiation Protection and Measurement, Washington, D.C. (January 1977).

2. "Environmental Radiation Measurements," Report No.50, National Council on Radiation Protection and Measurement, Washington, D.C. (December 1976).

3. "Exposure of the Population in the United States and Canada from Natural Background Ra-diation," Report No.94, National Council on Radiation Protection and Measurement, Wash-ington, D.C. (December 1987).

4. "A Guide for Environmental Radiological Surveillance at U.S. Department of Energy Instal-lations," DOE/EP-0023, Department of Energy, Washington, D.C. (July 1981).

5. "Ionizing Radiation Exposure of the Population of the United States," Report No.93, Na-tional Council on Radiation Protection and Measurement, Washington, D.C. (September 1987).

6. "Natural Background Radiation in the United States," Report No.45, National Council on Radiation Protection and Measurement, Washington, D.C. (November 1975).

7. "Numerical Guides for Design Objectives and Limiting Conditions for Operation to meet the Criterion 'As Low As Reasonably Achievable' for Radioactive Material in Light Water Cooled Nuclear Power Reactor Effluents," Code of Federal Regulations, Title 10 Energy, Part 50 "Domestic Licensing of Production and Utilization Facilities," Appendix I (1988).

8. "Performance, Testing and Procedural Specifications for Thermoluminescent Dosimetry,"

American National Standards Institute, Inc., ANSI-N45-1975, New York, New York (1975).

9. "Public Radiation Exposure from Nuclear Power Generation in the United States," Report No.92, National Council on Radiation Protection and Measurement, Washington, D.C. (De-cember 1987).

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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report

10. "Radiological Assessment: Predicting the Transport, Bioaccumulation and Uptake by Man of Radionuclides Released to the Environment," Report No.76, National Council on Radiation Protection and Measurement, Washington, D.C. (March 1984).

11. Regulatory Guide 4.1, "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants," US NRC (April 1975).

12. Regulatory Guide 4.13, "Performance, Testing, and Procedural Specifications for Thermolu-minescent Dosimetry: Environmental Applications," US NRC (July 1977).

13. Regulatory Guide 4.15, "Quality Assurance for Radiological Monitoring Programs (Normal Operations) - Effluent Streams and the Environment," US NRC (February 1979).

14. Regulatory Guide 0475, "Radiological Environmental Monitoring by NRC Licensees for Routine Operations of Nuclear Facilities," US NRC (September 1978).

15. "Standards for Protection Against Radiation," Code of Federal Regulations, Title 10, Energy, Part 20 (1993).

16. Teledyne Isotopes Midwest Laboratory, "Operational Radiological Monitoring for the Davis-Besse Nuclear Power Station Unit No. 1, Oak Harbor, OH," Annual Report, Parts I and II (1977 through 1990).

17. Teledyne Isotopes Midwest Laboratory, "Final Monthly Progress Report to Toledo Edison Company", (1991-1999).

18. Environmental, Inc. Midwest Laboratory, "Final Report to FirstEnergy Corporation", (2000, 2001)

19. Teledyne Isotopes Midwest Laboratory, "Preoperational Environmental Radiological Moni-toring for the Davis-Besse Power Station Unit No. 1", Oak Harbor, OH (1972-1977).

20. Toledo Edison Company, "Davis-Besse: Nuclear Energy for Northern Ohio."

21. Toledo Edison Company, "Davis-Besse Nuclear Power Station, Unit No. 1, Radiological Effluent Technical Specifications", Volume 1, Appendix A to License No. NPF-3.

22. Toledo Edison Company, "Final Environmental Statement -Related to the Construction of Davis-Besse Nuclear Power Station," Docket #50-346 (1987).

23. Toledo Edison Company, "Performance Specifications for Radiological Environmental Monitoring Program," S-72N.

24. Toledo Edison Company, "Radiological Environmental Monitoring Program," DB-HP-00015.

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Davis-Besse Nuclear Power Station 2002 Annual Radiological Environmental Operating Report

25. Toledo Edison Company, "Radiological Environmental Monitoring Quarterly, Semiannual, and Annual Sampling", DB-HP-03004.

26. Toledo Edison Company, "Radiological Monitoring Weekly, Semimonthly, and Monthly Sampling," DB-HP-03005.

27. Toledo Edison Company, "REMP Enhancement Sampling", DB-HP-10101.

28. Toledo Edison Company, "Updated Safety Analysis for the Offsite Radiological Monitoring Program", USAR 11.6, Revision 14, (1992).

29. Toledo Edison Company, "Annual Radiological Environmental Operating Report Preparation and Submittal", DB-HP-00014.

30. Toledo Edison Company, Davis-Besse Nuclear Power Station, Offsite Dose Calculation Manual

31. "Tritium in the Environment", Report No. 62, National Council on Radiation Protection and Measurements, Washington, D.C. (March 1979).

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