ML061230661

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Radioactive Effluent Release Report, January Through December 2005
ML061230661
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 04/28/2006
From:
Exelon Generation Co, Exelon Nuclear
To:
NRC/FSME
References
FOIA/PA-2010-0209
Download: ML061230661 (84)
v • d • e


Text

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237/50-249 Regulatory Limits

a. For Noble Gases:

Mzse Rate

1) Less than 500 mrem/year to the whole body.
2) Less than 3000 mrem/year to the skin.

Dn-s g(anmmn Radiatinn

1) Less than or equal to 5 mrad/quarter.
2) Less than or equal to 10 mradlyear.

Reta Radiation

1) Less than or equal to 10 mrad/quarter.
2) Less than or equal to 20 mradlyear.

b.,c. For Iodine- 131, for Iodine- 133, and for all radionuclides in particulate form with half-lives greater than 8 days:

nse Rate

1) Less than 1500 mremlyear.

Dose

1) Less than or equal to 7.5 mrem/quarter to any organ.
2) Less than or equal to 15 mrem/year to any organ.
d. For Liquid (each operating unit):

I) Less than or equal to 1.5 mrem to the whole body during any calendar quarter.

2) Less than or equal to 5 mrem to any organ during any calendar quarter.
3) Less than or equal to 3 mrem to the whole body during any calendar year.
4) Less than or equal to 10 mrem to any organ during any calendar year.
2. Maximum Permissible Concentration a., b., c. For fission and activation gases, iodines and particulates with half-lives greater than 8 days, allowable dose rates are calculated by solving equations 10-1 and 10-2 from the Offsite Dose Calculation Manual (ODCM).
d. For liquid effluents, allowable release limits are calculated by solving equations 10-3 and 10-4 from the ODCM.
3. Average Energy The ODCM limits the dose equivalent rates due to the release of fission and activation gases to less than or equal to 500 mrem per year to the total body and less than or equal to 3,000 mrem per year to the skin. These limits are based on dose calculations using actual isotopic concentrations of our effluent streams and not based on gross count rate measuring systems. Therefore, the average beta and gamma energies (E) for gaseous effluents as described in Regulatory Guide 1.21, "Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," are not applicable.

I

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237/50-249

4. Measurement and Approximations of Total Radioactivity
a. Fission and Activation Gases:
b. lodines:
c. Particulates:

The Units 2/3 and Unit 1 Chimneys, Units 2/3 Reactor Building Vent and Unit I Chemical Cleaning Building effluents are continually sampled for iodines and particulates. These samples are changed weekly and analyzed by gamma spectroscopy. The particulate filters are composited and sent to a vendor for gross alpha, Sr-89/90, and Fe-55 analysis. Noble gas grab samples are obtained weekly and analyzed by gamma spectroscopy. Tritium samples are obtained monthly and analyzed by liquid scintillation.

For the Units 2/3 Chimney and Units 2/3 Reactor Building Vent effluents, the average flow at the release points is used to calculate the curies released. For the Unit I Chimney and Unit I Chemical Cleaning Building effluents, the design basis flows are used to calculate curies released.

d. Liquid Effluents:

The river discharge tanks are analyzed for gamma-emitting nuclides by gamma spectroscopy and for tritium by liquid scintillation prior to discharge. A representative portion of this sample is saved and composited with other discharges that occur during the sampling period. The composite is sent to a vendor for analyses of gross alpha, Fe-55, and Sr-89/90.

The tank volumes and activities are used to calculate the diluted activity released at the discharge point from batch discharges.

e. Less than the Lower Limit of Detection (<LLD)

Samples are analyzed such that the ODCM LLD requirements are met. When a nuclide is not detected then <LLD is reported.

f. Equipment Out of Service (1) The Unit 3 Service Water Effluent Radiation Monitor was out of service from 0534 on November 22, 2004 until 2138 on April 9, 2005. The monitor was declared inoperable due to low sample flow through the monitor. This inoperability was not corrected in a timely manner due to excessive lead time for replacement parts, the repair of a crack discovered in the sample header, and the development and implementation of an engineering modification to improve monitor sample flow. Contingency grab sampling and analysis was performed as required during the monitor's inoperability. This inoperability of greater than 30 days is being reported per Dresden ODCM Section 12.2.A. 1.3. This inoperability was also reported in the 2004 Annual Radioactive Effluent Release Report.

(2) The Unit 3 Service Water Effluent Radiation Monitor was out of service from 2226 on April 12, 2005 until 0130 on June 15, 2005. The monitor was declared inoperable due to low sample flow through the monitor.

This inoperability was not corrected in a timely manner due to excessive lead time for replacement parts (flow element power supply). Contingency grab sampling and analysis was performed as required during the monitor's inoperability. This inoperability of greater than 30 days is being reported per Dresden ODCM Section 12.2.A. 1.3.

(3) The Units 2/3 Main Chimney System Particulate, Iodine, and Noble Gas (SPING) Monitor was out of service on April 20, 2005 from 1417 until 1830 due to operator error. During this time, continuous iodine and particulate sampling was interrupted. The backup monitor was in service and was used to meet continuous noble gas monitoring requirements during this time. The condition was identified and corrected immediately.

2

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237/50-249

4. Measurement and Approximations of Total Radioactivity (continued)
g. Estimation of Data/Corrections:

(1) On April 20, 2005 continuous iodine and particulate monitoring of the Units 2/3 Main Chimney was interrupted from 1417 to 1830. The backup noble gas monitor output during this time was reviewed and no significant fluctuation was seen. It is estimated that the particulate and iodine concentrations during the interruption are equal to the particulate and iodine concentrations during the balance of that weekly collection period.

(2) On June 14, 2005 the particulate filter in the Units 2/3 Main Chimney SPING monitor was found to be out of position in the sample stream. This resulted in an inaccurate particulate sample collection (specifically volume measurement) for the sampling period of 0905 on June 8, 2005 to 1115 on June 14, 2005. Iodine sample collection and continuous noble gas monitoring were not affected. The ratio of Ba- 139 detected on both the iodine cartridge and the particulate filter was used to estimate the Sr-89 released during the collection period, which is the only nuclide attributed to particulate monitoring of this point during this time period. Based on the estimated sample volume collected by the particulate filter, all of the required Lower Limits of Detection were met for particulate monitoring.

3

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237150-249 SUMMATION OF ALL GASEOUS RELEASES 2"d 3 rd 4t r Est. Total nuarter Q0iarter Quarter 0Arter Frror m A PTVtTnA R, ArT1VATTANT r.AQF

1. Total Release Ci 2.1OE+01 1.94E+01 1.55E+01 9.57E+00 24.5%
2. Average Release Rate for the Period pCi/sec 2.7 1E+00 2.46E+00 1.95E+00 1.20E+00
3. Percent of Technical Specification Limit  % * * *
1. Total Iodine-131 Ci 1.27E-04 2.06E-04 2.06E-04 1.66E-04 26.0%
2. Average Release Rate of 1-131 for the Period pCi/sec 1.63E-05 2.62E-05 2.59E-05 2.09E-05
3. Percent of Technical Specification Limit  % * * * *
4. Total Iodine-131. Iodine-133 and Iodine-135 Ci 5.14E-04 8.77E-04 9.29E-04 5.82E-04 C. PARTICULATES
1. Particulates with half-lives > 8 days Ci 6.1OE-04 5.31E-04 3.87E-04 6.61E-04 29.0%
2. Average Release Rate for the Period RCi/sec 7.85E-05 6.75E-05 4.87E-05 8.3 1E-05
3. Percent of Technical Specification Limit  % * * * *
4. Gross Alpha Radioactivity Ci <LLD <LLD <LLD <LLD D. TRITIUM
1. Total Release Ci 2.29E+00 l1.12E+01 4.87E+00 4.94E+00 l 7.62%

I Avi-mae Release Rate fnr the Perind pri/sec 9 Q"R-n I I A4F.&.flf 6 1i iln AFA 1 T_ _- -V

3. Percent of Technical Specifcto Limit 3.ification ii *- I *a ___ _
  • The information is contained in the Radiological Impact on Man section of the report. Total airborne release data are provided which include fission and activation gases, iodines, particulates, and tritium.

4

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237150-249 TABLE OF LOWER LIMITS OF DETECTABILITY FOR AIRBORNE EFFLUENTS

1. FISSION/ACTIVATION GASES gCilcc Kr-87 1.OOE-04 Kr-88 I.OOE-04 Xe-133 1.OOE-04 Xe-133m 1.00E-04 Xe-135 I .OOE-04 Xe-138 1.OOE-04
2. IODINES 4ci/cc 1-131 1.OOE-12 1-133 1.OOE-10
3. PARTICULATES ACilcc Sr-89 1.OOE- 11 Sr-90 I .OOE- 11 Mn-54 1.OOE- 1I Co-58 1.OOE- 1I Fe-59 1.OOE- 11 Co-60 1.OOE- 11 Zn-65 I .OOE- 11 Mo-99 1.OOE- 1I Cs-134 1.OOE- I I Cs- 137 1.OOE- 1I Ce-141 1.OOE- 11 Ce-144 1.OOE- 11
4. OTHER ACi/cc H-3 I .OOE-06 Gross Alpha 1.OOE- I1 The above values are the ODCM-required LLDs. The actual analyses always met the required LLDs.

5

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DI MAIN CHIMNEY GASEOUS EFFLUENTS DOCKET NUMBER: 50-010 GROUND LEVEL RELEASES SEMI-ELEVATED RELEASES xx ELEVATED RELEASES CONTINUOUS MODE NUCLIDES RELEASED UNIT 1" QTR 2d QTR l 3rdQTR 41h QTR TOTAL FISSION GASES Ci * * * *

  • Ar-41 Ci * * * *
  • Ci * * * *
  • Kr-87 Kr-88 Ci Xe-133 Ci * * * *
  • Ci * * * *
  • Xe-133m Xe-135 Ci _ _

Ci * * * *

  • Xe-135m Xe-138 Ci Ci * * * *
  • TOTAL IODINES 1-131 Ci 1-133 Ci
  • 1-135 Ci _
  • TOTAL PARTICULATES Fe-55 Ci Sr-89 Ci
  • Ci * * * *
  • Ci 3.66E-06 1.33E-06 9.72E-07 1.06E-06 7.02E-06 Mn-54 Co-57 Ci Co-58 Ci
  • _
  • Fe-59 Ci *
  • __
  • Ci 1.76E-06 3.08E-07 1.58E-06 2.59E06 6.24E-06 Co-60 Zn-65 Ci _ * *_ _
  • _
  • Zr-95 Ci * *
  • _
  • _ *
  • Sn-113 Ci
  • Sb-124 Ci Sb-125 Ci
  • Cs-134 Ci Ci * * *
  • Cs-136 Ci 11.75E-07 1.84E-06
  • 2.02E-06 Cs- 137 Ci
  • Ba-133 Ba-140 Ci
  • Ci * * * *
  • Ce-141 Ce-144 Ci Ci 5.42E-06 1.81E-06 4.39E-06 3.65E-06 1.53E-05 TOTAL
  • The activity of this nuclide is less than the LLD.

6

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DI MAIN CHIMNEY GASEOUS EFFLUENTS DOCKET NUMBER: 50-010 GROUND LEVEL RELEASES SEMI-ELEVATED RELEASES X3( ELEVATED RELEASES BATCH MODE NUCLIDES RELEASED UNI1 i" QTR 2I QTR 3"d QTR 4h QTR TOTAL FISSION GASES Ar-41 Ci Kr-85 Ci Kr-85m Ci __ _ _ _ _ __ _ _ _ _ __ _ _ _ _

Kr-87 Ci ___________

Kr-88 Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-135m Ci Xe-138 Ci TOTAL Ci None None None None None IODINES 1-131 Ci 1-133 Ci 1-135 __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

TOTAL Ci None None None None None PARTICULATES Fe-55 Ci __ _ _ _ ___ _ _ _ _

Sr-89 Ci _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Sr-90 Ci C r-5I Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Mn-54 Ci Co-57 Ci Co-58 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Fe-59 Ci Co-60 Ci _ _ _ _ _ _ _ _ _ _ _ _

Zn-65 Ci Sr-85 Ci Zz-95 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Mo-99 Ci Ru-103 Ci Ajz-I10m Ci Sn-113 __ _ __ _ _

Sb- 124 Ci _ _ _ _ _ _ _

Sb-125 Ci _

Cs-134 Ci Cs-136 Ci Cs-137 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ba-133 Ci _ _ _ _

Ba-140 __ _ _ _ __ _ _ _ __ _ _ _

Ce-141 Ci Ce-14 Ci _ _ _ _ _

TOTAL Ci None None None None None

  • The activity of this nuclide is less than the LLD.

7

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 D2/3 REACTOR BUILDING VENT GASEOUS EFFLUENTS DOCKET NUMBERS: 50-237/50-249 GROUND LEVEL RELEASES xx SEMI-ELEVATED RELEASES ELEVATED RELEASES CONTINUOUS MODE NUCLIDES RELEASED UNIT It T 2' QTR 3r QT 4tQTR TOTAL FISSION GASES Ar-41 Ci Kr-85 Ci

  • Kr-85m Ci Kr-87 Ci Kr-88 Ci *
  • Xe-133 Ci Xe-133m Ci Xe-135 Ci * * * *
  • Xe-135m Ci Xe-138
  • 9.71 E-06 9.71 E-06 1-133 Ci 6.52E-06 6.52E-06 1-135 Ci .

TOTAL Ci 6.52E-06 9.71E-06 1.62E-05 PARTICULATES Fe-55 Ci 4.94E-05

  • 4.94E-05 Sr-89 Ci Sr-90 Ci Cr-51 Ci 1.34E-05 1.34E-05 Mn-54 Ci 4.16E-05 1.06E-04 2.51E-05 1.IOE-04 2.83E-04 Co-57 Ci* * *
  • Co-58 Ci 1.27E-06 3.25E-06 4.52E-06 Fe-59 Ci
  • 1.68E-05 1.92E-05 3.60E-05 Co-60 Ci 5.89E-05 9.30E-05 3.51 E-05 9.45E-05 2.82E-04 Zn-65 Ci
  • 1.18E-06
  • 2.33E-05 2.45E-05 Sr-85 Ci Nb-95 Ci Mo-99 Ci 2.80E-06 2.80E-06 Ru-103 Ci Cd- 109 Ci
  • AR-11Om Ci Sn-113 Ci Sn-117m Ci Sb- 124 Ci Cs-137 Ci
  • Ba-133 Ci Ba-140 Ci Ce-141 Ci
  • Ce- 144 Ci Hg-203 Ci TOTAL Ci I.50E-04 2.18E-04 6.01E-05 2.67E-04 6.95E-04
  • The activity of this nuclide is less than the LLD.

8

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 D2/3 REACTOR BUILDING VENT GASEOUS EFFLUENTS DOCKET NUMBERS: 50-237/50-249 GROUND LEVEL RELEASES xx SEMI-ELEVATED RELEASES ELEVATED RELEASES BATCH MODE NUCLIDES RELEASED UNIT 1" QTR 2"d QTR 3d TR 4 QTR TOTAL FISSION GASES Ar-41 Ci Kr-85 Ci _ _ _ _ _ __ _ _ _ _ _

Kr-85m Ci _ _ _ _ _

Kr-87 Ci Kr-88 Ci Xe-133 Ci _ _ _ _ _ _ _ __ _ _ _ _ _ _ _

Xe-133m Ci X e-135 Ci _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _

Xe-135m Ci Xe-138 Ci TOTAL Ci None None None None None IODINES 1-131 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

1-133 Ci _ .

1-135 __ _ _ __ _ _ _

TOTAL Ci None None None None None PARTICULATES Fe-55 Ci _ _ _ _ _ _ _ _

Sr-89 Ci Sr-90 Ci C r-51 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Mn-54 Ci Co-57 Ci CO-58 Ci _ _ _ _ _ _ _ _ _ _

Fe-59 Ci Co-60 Ci _ _ _ _ _ _ _ _ _ _

Zn-65 Ci Sr-85 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Zr-95 Ci _ _ _ _ _ _ _ _ _ _

Mo-99 Ci _ _ _ _ _

Ru-103 Ci Az-I IOm Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Sn- 113 Ci . _

Sb-124 Ci _ _ _ _ _ _ _ _ _ _ _ _ _

Sb- 125 Ci Cs-134 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Cs-136 Ci Cs-137 Ci Ba-133 Ci _ . -

Ba-140 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ce-141 I Ci I _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ce-144 Ci TOTAL Ci None None None None None

  • The activity of this nuclide is less than the LLD.

9

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 D2/3 MAIN CHIMNEY GASEOUS EFFLUENTS DOCKET NUMBERS: 50-237/50-249 GROUND LEVEL RELEASES SEMI-ELEVATED RELEASES xx ELEVATED RELEASES CONTINUOUS MODE NUCLIDES RELEASED UNIT i1 TR 2M OT 3 id Q m 4 OQTR l TOTAL FISSION GASES Ar-41 Ci 4.78E+00 3.78E+00 3.84E+00 I.51E+00 1.39E+01 Ci * * *

  • Kr-85m Ci 9.01E-01 7.04E-01 6.91 E-01 3.35E-01 2.63E+00 Kr-87 Ci 6.12E-01 5.88E-01 4.98E-01 3.02E-01 2.00E+00 Kr-88 Ci 1.03E+00 9.56E-01 9.09E-01 4.31 E-01 3.33E+00 Xe-131m Ci Xe-133 Ci 1.07E+00 1.37E+00 7.33E-01 3.51E-01 3.52E+00 Xe-133m Ci * *
  • Xe- 135 Ci 2.48E+00 2.36E+00 I.31E+00 1.68E+00 7.83E+00 Xe-135m Ci 2.07E+00 1.97E+00 1.55E+00 1.03E+00 6.61E+00 Xe-138 Ci S.09E+00 7.66E+OO 5.98E+00 3.92E+00 2.57E+01 TOTAL Ci 2.10E+01 1.94E+01 1.55E+01 9.57E+00 6.55E+01 IODINES 1-13 1 Ci 1.27E-04 2.06E-04 1.76E-04 1.57E-04 6.65E-04 1-133 Ci 3.75E.04 6,71E-04 6.38E-04 4.15E-04 2.10E-03 1-135 Ci 1.26E-05
  • 1.09E-04
  • 1.21 E-04 TOTAL Ci 5.14E-04 8.77E-04 9.23E-04 5.72E-04 2.89E-03 PARTICULATES Fe-55 Ci Sr-89 Ci 5.81 E-05 8.62E-05 9.06E-05 5.14E-05 2.86E-04 Sr-90 Ci * * * *
  • Cr-51 Ci * * * *
  • Mn-54 Ci 1.46E-04 4.65E-05 5.54E-05 6.34E-05 3.11 E-04 Co-57 Ci
  • Co-58 Ci 5.48E-06 * *
  • 5.48E-06 Fe-59 Ci 4.32E-06 *
  • 1. 14E-05 1.57E-05 Co-60 Ci 1.05E-04 4.02E-05 7.20E-05 7.08E-05 2.88E-04 Zn-65 Ci
  • Y-88 Ci * * * *
  • Zr-95 Ci * *
  • Ci * * * *
  • Ae-I 1Om Ci
  • _
  • 2.94E-06 2.94E-06 Ci * * * *
  • Sn-113 Sn-117m Ci * * * *
  • Cs-136 Ci * * * *
  • Cs- 137 Ci 1.88E-06 * *
  • 1.88E-06 Ba-140 Ci I.31E-04 1.37E-04 1.03E-04 1.36E-04 5.07E-04 H2-203 Ci **

Ce-141 Ci * *

  • 4.91E-06 4.91E-06 Ce-144 Ci * * * *
  • TOTAL Ci 4.52E-04 3.10E-04 3.2 1E-04 3.41 E-04 1,42E-03
  • The activity of this nuclide is less than the LLD.

10

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 D2/3 MAIN CHIMNEY GASEOUS EFFLUENTS DOCKET NUMBERS: 50-237/50-249 GROUND LEVEL RELEASES SEMI-ELEVATED RELEASES xx ELEVATED RELEASES BATCH MODE NUCLIDES RELEASED UNIT I QTR 2nd QTR 3fd QTR 4h QTR TOTAL FISSION GASES Ar-41 Ci Kr-85 Ci _ _ _ _ _

Kr-85m Ci _ _ _ _ _

Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci _ _ _ _ _

Xe-135m Ci ________

Xe-138 __ _ _ __ _ _ _

TOTAL Ci None None None None None IODINES I-131 Ci _ _ _ _ _ _ _ __ _ _ _ _ _ _ _

1-133 Ci 1-135 __ _ _ _ _ __ _ _ _ __ _ _ _ _

TOTAL Ci None None None None None PARTICULATES Fe-55 Ci _ _ _ _ _ _ _ _ _ _

Sr-89 Ci Sr-90 Ci Cr-51 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Mn-54 Ci Co-57 Ci Co-58 Ci Fe-59 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Co-60 Ci _ _ _ _ _ _ _ _ _ _

Zn-65 Ci _ _ _ _ _ _ _ _ _ _

Sr-85 Ci Zr-95 Ci Mo-99 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ru-103 Ci _ _

-I I Orn Ci __ _ _ _ _ _ _ _ _ _

Sn- 103 Ci Sb-124 Ci Sb-125 Ci Cs-134 Ci Cs- 136 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Cs-137 Ci Ba-133 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ba-140 Ci _ _ _ _ _ _ _ _ _ _ _ _

Ce-141 Ci Ce-144 Ci TOTAL Ci None None None None None

  • The activity of this nuclide is less than the LLD.

11

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 CHEMICAL CLEANING BUILDING GASEOUS EFFLUENTS DOCKET NUMBERS: 50-010/50-237/50-249 GROUND LEVEL RELEASES YY SEMI-ELEVATED RELEASES ELEVATED RELEASES CONTINUOUS MODE NUCLIDES RELEASED UNIT ISQTR 2d OTR 3" OTR 44 QTR TOTAL FISSION GASES Ci # * # #

Ar-41 #

Ci * * # #

Kr-85

  • Kr-85m Ci Ci # # #
  • Kr-87
  • Ci #

Kr-88 Ci # # * #

Xe-133

  • Xe-I33m Ci #

Xe-135 Ci Ci # * * #

  • Xe-135m ci * *
  • Xe-138 Ci * # # #

TOTAL

Ci # # * #

1-133

  • ci * #

1-135 #

Ci #

TOTAL PARTICULATES Fe-55 Ci * # # #

  • Sr-89 Ci * * # # #

Sr-90 Ci * # # * #

Cr-51 Ci #

Mn-54 Ci 2.60E-06 4.32E-07 1.26E-06 2.73E-07 4.56E-06 Co-57 ci # # # #

Co-58 Ci * * # * #

Fe-59 Ci * # # #

  • Co-60 Ci 3.40E-07 # 8.29E-07 1.28E-06 2.45E-06 Zn-65 Ci * # # # #

Sr-85 Ci # # # # #

Zr-95 Ci * * * # #

MO-99 Ci #

Ru-103 ci * *#

ci # # * #

Ae-1Im _

Ci # # # #

Sn-113 Sb-124 Ci # # * *

  • Sb- 125 Ci _ .. #

Cs-134 Ci _ # * * #

Cs-136 Ci # # . #

  • Cs- 137 - ci Ba-133 Ci

.Ba-140 ci# ###

Ce- 141 ci### #

Ce-144 ci TOTAL Ci 2.94E-06 4.32E-07 2.09E-06 I.55E-06 7.01E-06

  • The activity of this nuclide is less than the LLD.

12

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 CHEMICAL CLEANING BUILDING GASEOUS EFFLUENTS DOCKET NUMBERS: 50-010/50-237/50-249 GROUND LEVEL RELEASES xx SEMI-ELEVATED RELEASES ELEVATED RELEASES BATCH MODE NUCLIDES RELEASED UNIT 1" QTR 2' OQTR 3id 44' QTR TOTAL FISSION GASES Ar-41 Ci Kr-85 Ci _ 1 _

Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _

Xe-133m Ci _ _ ___ _ _ _ _ _

Xe- 135 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _

Xe-135m Ci Xe-138 Ci TOTAL Ci None None None None None IODINES 1-131 Ci _ _ _ _ _ _ _ __ _ _ _ _ _ _ _

1-133 Ci 1-135 __ _ _ _ _ _ _ _ _ _

TOTAL Ci None None None None None PARTICULATES Fe-55 Ci _ _ _ _ _ _ _ _ _ _ _ __

Sr-89 Ci Sr-90 Ci . _ _ _

C r-5I Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Mn-54 Ci Co-57 Ci _ _ _ _ _ _ _ _ _ _

C &-58 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Fe-59 Ci Co-60 Ci ZJ1-65 Ci _ _ _ _ _ _ _ _ _ _

Sr-85 Ci Zr-95 Ci _ ___ _ _

MO-99 Ci _ _ _ _ _ _ _ _ _ _

Ru-103 Ci Ag- I 1Om Ci _ _ _ _ _ _ _ _ _ __

Sn- 113 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _

Sb-124 Ci Sb-125 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _

Cs-134 Ci Cs-136 Ci _ _ _ _ _ _ _

C s-137 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ba-133 Ci Ba-140 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Cc-141 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ce-144 Ci _ _ _ _ _ _ _ _ _ _

TOTAL Ci None None None None None

  • The activity of this nuclide is less than the LLD.

13

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010150-237/50-249 TABLE OF LOWER LIMITS OF DETECTABILITY FOR LIQUID EFFLUENTS

1. FISSION/ACTIVATION GASES ,jCilml Kr-87 1.OOE-05 Kr-88 I .OOE-05 Xe-133 1.001E-05 Xe-133m 1.001E-05 Xe-135 Xe-138 1.00E-05
2. IODINES aCi/ml I-131 1.OOE-06
3. PARTICULATES gCilml Fe-55 1.00E-06 Sr-89 5.00E-08 Sr-90 5.OOE-08 Mn-54 5.00E-07 Co-58 5.00E-07 Fe-59 5.00E-07 Co-60 5.00E-07 Zn-65 5.OOE-07 Mo-99 5.OOE-07 Cs-134 5.00E-07 Cs- 137 5.OOE-07 Ce-141 5.OOE-07 Ce-144 5.00E-06
4. OTHER RCilml H-3 1.00E-05 Gross Alpha 1.00E-07 The above values are the ODCM-required LLDs. The actual analyses always met the required LLDs.

14

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237/50-249 SUMMATION OF ALL LIQUID RELEASES I St 3 rd 4th Est.

2nd liits Qarter Total (nart Qnarter Quarter Ffnr OA A. FISSION & ACTIVATION PRODUCTS

1. Total Release (not including H-3. gases, alpha) Ci 5.80E-04 <LLD 1.35E-06 5.41E-03 17.4%
2. Average Diluted Conc. During Period uCi/ml 4.55E-09 <LLD 7.75E-10 3.38E-08
3. Percent of Technical Specification Limit  % * * *
1. Total Release Ci 4.67E+00 <LLD <LLD 7.01E+00 1.75%
2. Average Diluted Conc. During Release uCi/ml 3.67E-05 <LLD <LLD 4.38E-05
3. Percent of Technical Specification Limit  % * *
  • C. DISSOLVED AND ENTRAINED GASES
1. Total Release Ci <LiD <LLD <LLD <LLD 20.3%
2. Average Diluted Conc. During Period uCi/mi <LLD <LLD <LLD <LiD
3. Percent of Technical Specification Limit  %

D. GROSS ALPHA ACTIVITY

1. Total Release Ci <LLD <LLD <LLD <LLD 20.1% l E. VOLUME OF WASTE RELEASED Liters 1.03E+06 2.63E+05 2.14E+05 1.16E+06 1.00%

(prior to dilution) i l 2.63E+05 l.14E+05 l 1.E+0 5.00%

1 l F. ILTIN WTE UEDLiters OLMEOF 1.26E+08 1.88E-i06 1.53E+06 1.59E+08 5.00%

DUIGPERIODIII

  • The information is contained in the Radiological Impact on Man section of the report.

15

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 RADWASTE LIQUID EFFLUENTS DOCKET NUMBERS: 50-010/50-237/50-249

1. Number of Batch Releases: 6
2. Total Time for Batch Releases: 1.77E+03 minutes
3. Maximum Time Period for a Batch Release: 3.39E+02 minutes
4. Average Time Period for a Batch Release: 2.96E+02 minutes
5. Minimum Time Period for a Batch Release: 1.56E+02 minutes
6. Average Stream Flow During Periods of Release of Effluent into a Flowing Stream: 1.59E+05 Ipm RATCH MOnF Tnit 1

'SOuarter 9 nd Ouarter 3rd Ouarter 411 Ounrter Tntal Fe-55 Ci_ *

  • Sr-89 Ci * *
  • 1-131 Ci * *
  • 1-132 Ci * *
  • 1-133 Ci * *
  • 1-134 Ci * *
  • 1-135 Ci * *
  • Cr-51 Ci
  • 3.44E-04 3.44E-04 Mn-54 Ci 1.85E-04 2.09E-03 2.27E-03 Co-58 Ci
  • 7.41E-05 7.41E-05 Fe-59 Ci
  • 5.91E-04 5.91E-04 Co-60 Ci 3.55E-04 1.64E-03 1.99E-03 Zn-65 Ci
  • 3.64E-04 3.64E-04 As-76 Ci * *
  • Zr-95 Ci Sr-91 Ci * *
  • Tc-99m Ci * *
  • Ru-103 Ci * *
  • Ae-110m Ci 8.36E-06 2.80E-04 2.89E-04 Sb- 124 Ci
  • 3.30E-05 3.30E-05 Cs-134 Ci * *
  • Cs-136 Ci * *
  • Cs- 137 Ci 2.70E-05
  • 2.70E-05 Ba-139 Ci * *
  • Ba- 140 Ci * *
  • La-140 Ci * . *
  • Ce-141 Ci * * *

(above) Ci 5.75E-04 None None 5.4 1E-03 5.99E-03 Total H-3 Ci 4.67E+00 7.01E+00 I.17E+01 Kr-87 Ci * *

  • Kr-88 Ci * *
  • Xe- 133 Ci * *
  • Xe-133m Ci * *
  • Xe-135 Ci * *
  • Xe-138 Ci * * *
  • The activity of this nuclide is less than the LLD.

16

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 RADWASTE LIQUID EFFLUENTS DOCKET NUMBERS: 50-010/50-237150-249 CONTINM 101TS MflfF.

Unit I s' Onrter _0d.anrter I d Oiirter 4 Quarter Tntal F e-55 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Sr-89 Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Sr-90 Ci _ __ _ _ I 1-131 Ci _ _

1-132 Ci I 3 3 1-1 Ci _ _ _ _ _ _ __ _ _ _ _ _

1-134 Ci _ _ _ _ _ _ _ _ _ _ _ _

1-135 Ci _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _

Cr-51 Ci _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _

Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci As-76 Ci _I _ _ - _ _ _

Zr-95 Ci Mo-99 Ci _ .

Tc-99m Ci Ru- 103 Ci Ae-110m Ci Sb-124 Ci Cs-134 Ci _

Cs- 137 Ci Cs-138 Ci Ba- 140 Ci La-140 Ci _ _ _ _

Ce-141 Ci (above) Ci None None None None None Total _ _ _ _ _ _ _

H-3 Ci l Kr-88 C _ _ _ _ _ _ _ _ _ _ _ _ _ _

X~e-1833 ' Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Xe-133m Ci I I I Xe-138 Ci

  • The activity of this nuclide is less than the LLD.

17

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 LPCI SYSTEM EFFLUENTS DOCKET NUMBERS: 50-237/50-249

1. Number of Batch Releases: 64
2. Total Time for Batch Releases: 7.94E+01 minutes
3. Maximum Time Period for a Batch Release: l.24E+00 minutes
4. Average Time Period for a Batch Release: 1.24E+00 minutes
5. Minimum Time Period for a Batch Release: 1.24E+00 minutes
6. Average Stream Flow During Periods of Release of Effluent into a Flowing Stream: 9.46E+04 Ipm IRATCH MOME T Tnit I St()nart~r )nd( nsrtar 11rdrliirfr Ath nimrter Tntal Fe-55 Ci * * * *
  • Sr-89 Ci
  • 1-131 Ci *
  • _
  • 1-132 Ci 1-133 Ci * *
  • 1-134 Ci * * * *
  • I-135 Ci Cr-51 Ci * *
  • Mn-54 Ci
  • 8.14E-07
  • 8.14E-07 Co-58 Ci Fe-59 Ci .
  • 5.33E-07
  • 5.33E-07 Zn-65 Ci As-76 Ci * * * *
  • Zr-95 Ci * * * *
  • Sr-91 Ci
  • Tc-99m Ci * * * *
  • Ru-103 Ci Ag-110m Ci * * * *
  • Sb-124 Ci Cs-134 Ci * * * *
  • Cs-136 Ci *
  • 4.74E-06 Ba-139 Ci * * * *
  • Ba-140 Ci
  • a-140 Ci * * *
  • Ce-141 Cit * * **
  • Nr-239 Ci (above) Ci 4.74E-06
  • 1.35E-06
  • 6.09E-06 T o ta l _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

H-3 Ci * * * *

  • Kr-87 Ci Kr-88 Ci * * * *
  • Xe-133 Ci * * * *
  • Xe-135 Ci * * * *
  • Xe-138 Ci
  • The activity of this nuclide is less than the LLD.

18

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 LPCI SYSTEM EFFLUENTS DOCKET NUMBERS: 50-237/50-249 CONTINI TO IS MODF Uni"t ISt Ouanrter 2nd Ouarter 'Ad Oua~rter A4h )Ouarter Tntal Fe-55Ci_ _ _ _ _ _ __ _ _ _ _ _

Sr-89 Ci _ _ _ _ _ _

Sr-90 Ci 1-131 Ci == ===

1-132 Ci _ _ _ _

1-134 Ci 1-135 Ci_ _ _ _ _ _ _

Mn-54 Ci _____ _

CFe°-5S9 Ci Co-60 Ci As-76 Ci Zr-95 Ci _ ________

Sr-91 Ci __ _ __ _

Mo-99 Ci Tc-99m Ci Ru-103 Ci 1 Ag-l 10m Ci Sb-124 Ci _ _ _

Cs- 134 Ci Cs-136 Ci Cs- 138 Ci _ _ _ _ _ _ _ _ _ _ _ _

Ba-140 Ci La-140 Ci Ce-141 Ci _ _ _ _ _ _ _ _ _ _

ND-239 Ci (above) Ci None None None None None Total__ _ _ _ _ _ _ _ _ _

H-3 Ci Kr-87 Ci _________

Kr-88 Ci ________1 Xe-133 Ci ____________

Xe-135 Ci __T _ I 1e38-X Ci _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

  • The activity of this nuclide is less than the LLD.

19

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237150-249 UNITS 1, 2 & 3 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (NOT IRRADIATED FUEU

1. Type of Waste Units 12-month period Est. Total Error,
a. Spent resins, filter sludges / filters, evaporator In 3 2.01E+02 bottoms, etc. Ci 1.33E+03 25%
b. Dry compressible waste, contaminated equipment, etc. iM 3

1.64E+03 25

_ __ _ _ __ _ _ _ __ __ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ C i 3.0 1E +0025

c. Irradiated components, control rods, etc. m3 7.37E+00 25%

__ __ _ _ __ __ _ _ __ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ C i 1.4 3E+ 0 1 _ _ _ _ _ _

m 3 I1.58E+03 25%

d. Other (describe) - Contaminated Oil, Contaminated Soil, Waste Metals, Combined Packages Ci 2.09E+0 1
2. Estimate of Major Nuclide Composition (by type of waste)
a. Spent resins, filters / filter sludges, evaporator bottoms, etc.

Percent % Cidries Fe-55 43.0 5.7 lE+02 Co-60 28.4 3.76E+02 Zn-65 9.27 1.23E+02 Mn-54 8.09 1.07E+02 Cs- 137 7.91 1.05E+02

b. Dry compressible waste, contaminated equipment, etc.

Percent % Cu ries Co-60 47.2 1.46E+00 Mn-54 25.7 7.96E-0 I Fe-55 14.0 4.35E-01 Cs- 137 3.94 1.22E-01 Ni-63 3.27 1.01E-01 Zn-65 2.06 6.40E-02 Fe-59 1.64 5.08E-02

c. Irradiated components, control rods, etc.

Percent % C0ies Fe-55 54.2 7.74E+00 Co-60 37.4 5.33E+00 Ni-63 5.71 8.14E-01 Mn-54 2.48 3.53E-01 20

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBERS: 50-010/50-237150-249 UNIT 1, 2 & 3 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS (Cont.)

2. Estimate of Major Nuclide Composition (by type of waste) - Continued
d. Other - Contaminated Oil, Contaminated Soil, Waste Metals, Combined Packages Percent % Curies Co-60 29.5 6.15E+00 Ni-63 19.1 3.99E+00 Mn-54 18.8 3.93E+00 Fe-55 15.1 3.16E+00 Fe-59 5.77 1.20E+00 Cr-51 4.33 9.04E-01 Cs- 137 2.02 4.22E-01 Co-58 1.23 2.56E-01 Sr-90 1.15 2.4 tE-0I
3. Solid Waste Description Nimher of Shipments Mnde nf Transportation Desfination 117 Motor Freight (exclusive use only) GTS Duratek, Kingston, TN 29 Motor Freight (exclusive use only) GTS Duratek, Oak Ridge, TN 17 Motor Freight (exclusive use only) Alaron, Wampum, PA 13 Motor Freight (exclusive use only) Envirocare, Clive UT 8 Motor Freight (exclusive use only) Studsvik Processing Facility, Erwin, TN 4 Motor Freight (exclusive use only) CNS, Barnwell, SC B. IRRADIATED FUEL SHIPMENTS (Disposition)

Number of Shipments Mode of Tranyportation Destiaicn None C. CHANGES TO THE PROCESS CONTROL PROGRAM (PCP)

The station Process Control Program was not changed during 2005.

21

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBER: 50-010/50-237150-249 ABNORMAL RELEASES*

A. LIQUID

1. Number of releases: 3
2. Total activity released: I 30E-01 (*i B. GASEOUS
1. Number of releases: (I
2. Total activity released:

A. 1 On March 10, 2005 the Unit 3 Service Water Radiation Monitor was out of service and compensatory samples were being drawn per site requirements. The sample collected at 0001 on March 10, 2005 contained detectable amounts of Mn-54, Co-58, and Co-60. The previous sample drawn at 1600 on March 9, 2005 did not contain detectable activity, and the following sample drawn at 0205 on March 10, 2005 did not contain detectable activity. The source of the activity was investigated but could not be determined. For conservatism, it is assumed that the measured activity was present for the entire time period between the two samples that did not contain detectable activity, or 605 minutes. Two Service Water pumps were running during this time with an estimated flow rate of 30,000 gallons per minute. The release volume is calculated from this flow rate times the estimated release period, or 605 minutes, for a total estimated release volume of 6.87E+10 ml. This estimated volume times the measured activity results in an estimated release of 4.02E-02 Ci of Mn-54, 3.1 IE-03 Ci of Co-58, and 4.1 IE-02 Ci of Co-60, for a total estimated release of 8.44E-02 Ci of activity from 1600 on March 9, 2005 to 0205 on March 10, 2005.

A.2 On March 11, 2005 the Unit 2 Service Water Radiation Monitor was out of service and compensatory samples were being drawn per site requirements. The sample collected at 0820 on March II, 2005 contained detectable amounts of Mn-54, Co-5 8, Fe-59, Co-60, and Sb- 124. The in-line monitor was removed from service at 0715 on March 11, 2005 due to low flow conditions, and had not indicated any activity above background levels. The sample drawn at 1035 on March 11, 2005 did not contain detectable activity. The source of the activity was investigated but could not be determined. For conservatism, it is assumed that the measured activity was present for the entire period between the time the monitor was removed from service and a sample that did not contain detectable activity, or 200 minutes. Two Service Water pumps were running during this time with an estimated flow rate of 30,000 gallons per minute. The release volume is calculated from this flow rate times the estimated release period, or 200 minutes, for a total estimated release volume of 2.27E+10 ml. This estimated volume times the measured activity results in an estimated release of 1.14E-02 Ci of Mn-54, 1.04E-03 Ci of Co-58, 4.54E-03 Ci of Fe-59, 6.49E-03 Ci of Co-60, and 1.38E-03 Ci of Sb-124, for a total estimated release of 2.48E-02 Ci of activity from 0715 to 1035 on March 11, 2005.

A.3 On March 12, 2005 the Unit 2 Service Water Radiation Monitor was out of service and compensatory samples were being drawn per site requirements. The sample collected at 0802 on March 12, 2005 contained detectable amounts of Mn-54 and Co-60. The previous sample drawn at 0003 on March 12, 2005 did not contain detectable activity, and the following sample drawn at 1020 on March 12, 2005 did not contain detectable activity. The source of the activity was investigated but could not be determined. For conservatism, it is assumed that the measured activity was present for the entire time period between the two samples that did not contain detectable activity, or 617 minutes. Two Service Water pumps were running during this time with an estimated flow rate of 30,000 gallons per minute. The release volume is calculated from this flow rate times the estimated release period, or 617 minutes, for a total estimated release volume of 7.OIE+10 ml. This estimated volume times the measured activity results in an estimated release of 1.37E-02 Ci of Mn-54 and 7.15E-03 Ci of Co-60, for a total estimated release of 2.08E-02 Ci of activity from 0003 to 1020 on March 12, 2005.

  • These releases are included in the Effluents Summation of all Releases Tables and in the Radiological Impact on Man.

22

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBER: 50-010/50-237/50-249 UNMONITORED RELEASES*

A. LIQUID

1. Number of Releases:
2. Total Activity Releases: v0SF-a-o Cli B. GASEOUS
1. Number of Releases: 4
2. Total Activity Releases: 1l F-04Ci A. 1 Water in on-site storm sewers is routinely sampled and analyzed for tritium content. The highest storm drain concentrations measured during each calendar quarter of 2005 was used to calculate the released activity for each quarter. The total activity released is based on an estimated typical discharge flow of 10 gallons per minute. An estimated 2.05E+00 Ci of tritium was released to the environment during 2005.

B. I The Unit I Main Turbine Floor (MTF) is used as an area to work on contaminated equipment. The ventilation system is no longer operational and the floor is at ambient pressure with the outside environment. With radiological work activities being performed on the MTF, the potential exists for airborne activity to be released to the environment through various potential release points. The estimated release through these points is 3.60E-05 Ci of Cs- 137 during 2005.

B.2 The Chemistry Laboratory Ventilation system exhausts directly into the environment and is not monitored. The estimated activity released to the environment in 2005 is 8.30E-05 Ci of noble gases and 8.02E-06 Ci of iodines and particulates.

B.3 The Unit 2/3 Heating Steam system has low-level contamination present. During operation of the system, some steam is vented directly into the environment. It is estimated that 7.48E-07 Ci of Mn-54 and 1.27E-06 Ci of Co-60 were released for a total estimated activity of 2.02E-06 Ci released to the environment from this system during 2005.

B.4 Past radiological surveys have identified low-level contamination in the East Turbine Building Ventilation ductwork. This system vents directly to the environment and is not monitored. An estimated total activity of 2.14E-06 Ci of Cs- 137 was released to the environment from this system during 2005.

  • These releases are included in the Effluents Summation of all Releases Tables and in the Radiological Impact on Man.

23

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DocKET NUMBER: 50-010 RADIOLOGICAL IMPACT ON MAN*

UNIT I

1. Airborne Releases Mimn n

-Q.....

~nn, h o .nt.A A kirhnrnP D1--C.C Quarterly Yearly Obj. Annual Dose Ist QTR 2n QTR 3"' QTR 4th QTR Obi.

Gamma Air 5.0 mrad O.OOE+O0 (e) O.OOE+OO (e) O.OOE+O0 (e) O.OOE+O0 (e) 10.0 mrad O.OOE+00 (e)

(m rad)__ _ _ _ _ __ _ _ _

Beta Air 10.0 mrad O.OOE+00 (e) O.OOE+00 (e) O.OOE+00 (e) O.OOE+00 (e) 20.0 mrad 0.OOE+00 (e)

(mrad) _ _ _ _ _

Total Body 2.5 mrem O.OOE+00 (e) O.OOE+00 (e) O.OOE+00 (e) O.OOE+00 (e) 5.0 mrem O.OOE+00 (e)

(mrem)

(mremn 7.5 mrem O.OOE+00 (e) O.OOE+00 (e) O.OOE+00 (e) O.OOE+00 (e) 15.0 mrem O.OOE+00 (e)

Organ 7.5 mrem 3.77E-06 (t) 1.83E-06 (c) 9.08E-06 (c) 7.90E-04 (i,c) 15.0 mrem 8.OOE-04 (c)

(mrem)

Critical Organ Lung Liver Liver Liver (i) Liver

2. Liquid Releases Maximum Doses from Aquatic Effluents Quarterly ts' QTR 2nd QTR 3rd QTR 4 QTR Yearly Obj. Annual Dose

_ __ _ _ _ _ _ O b i. _ _ _ _ _ _ _ _ _ _ _ _

Total Body 1.5 mrem None None None None 3.0 mrem None (mrem) 5.0 mrem None None None Noe_0._re_ Nn Omrgan 5.0 mrem None None None None 10.0 mrem None Critical Organ None None None None None

  • The doses reported include abnormal and unmonitored releases. These doses are the highest among the four analyzed receptors as described in parentheses [(i)=infant, (c)=child, (t)=teenager, (a)=adult, (e)=every receptor has the same value].

24

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBER: 50-237 RADIOLOGICAL IMPACT ON MAN*

UNIT 2

1. Airborne Releases T"-.-l frnm

&--P - 1 P>P D-rnrP --

Ivlas1111u111 IIII

.. Vill~ rX"icabc Quarterly QTR Yearly Obj. Annual Dose Is QTR 2ad QTR 3rd QTR 4 th Obi.

Gamma Air 5.0 mrad 1.67E-04 (e) 1.41E-04 (e) I. lOe-04 (e) 7.24E-05 (e) 10.0 mrad 4.9 1E-04 (e)

(m rad) _ _ _ I___ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Beta Air 10.0 mrad .OIE-05 (e) 8.96E-06 (e) 6.74E-06 (e) 4.64E-06 (e) 20.0 mrad 3.05E-05 (e)

(m rad)__ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ ___ _ _ _ _

Total Body 2.5 mrem 1.26E-04 (e) 1.06e-04 (e) 8.33E-05 (e) 5.47E-05 (e) 5.0 mrem 3.70E-04 (e)

(m rem )__ _ _ _ _ __ _ _ _ _ _ __ _ _ _ _ _ __ _ _ _ _ _

nem) 7.5 mrem 1.38E-04 (e) 1.17e-04 (e) 9.1 IE-05 (e) 5.99E-05 (e) 15.0 mrem 4.05E-04 (e)

(Omrgeam) 7.5 mrem 3.48E-04 (c) 2.23E-03 (c) 4.86E-03 (c) 2.50E-03 (c) 15.0 mrem 9.94E-03 (c)

Critical Organ Lung Thyroid Thyroid Thyroid Thyroid

2. Liquid Releases k4-i-.- lI-ep.

A*IrA IIlmumil HUflJO..

AroUl11 II Aiini L.AVffh.--tc

-I UcIILO _

Quarterly Yearly Obj. Annual Dose 1st QTR 2nd QTR 3rd QTR 4di QTR Obi.

Total Body 1.5 mrem 5.98E-05 (c) O.OOE+00 (e) 1.30E-09 (c) 3.04E-05 (c) 3.0 mrem 9.01 E-05 (c)

(Orgeam) 5.0 mrem 4.67E-04 (a) O.OOE+00 (e) 1.39E-08 (a) 4.63E-05 (a) 10.0 mrem 5.14E-04 (a)

Critical Organ GI_LLI None GILLI GI_LLI GI_LLI

  • The doses reported include abnormal and unmonitored releases. These doses are the highest among the four analyzed receptors as described in parentheses [(i)=infant, (c)=child, (t)=teenager, (a)=adult, (e)=every receptor has the same value].

25

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBER: 50-249 RADIOLOGICAL IMPACT ON MAN*

UNIT 3

1. Airborne Releases Maximum Doses from Airborne Releases Quarterly Ist QTR 3 rd QTR Yearly Obj. Annual Dose 2 nd QTR 4tb QTR Ohi Gamma Air 5.0 mrad 3.21E-04 (e) 2.96E-04 (e) 2.67E-04 (e) 1.37E-04 (e) 10.0 mrad 1.02E-03 (e)

(m rad)__ _ _ _ _ __ _ _ _ _

Beta Air 10.0 mrad 1.82E-05 (e) 1.68E-05 (e) 1.45E-05 (e) 8.24E-06 (e) 20.0 mrad 5.77E-05 (e)

(m rad)__ _ _ _ _ _ _ _ _ _ _ _

Total Body 2.5 mrem 2.42E-04 (e) 2.23E-04 (e) 2.01 E-04 (e) 1.03E-04 (e) 5.0 mrem 7.70E-04 (e)

(mrem)_______

nem) 7.5 mrem 2.64E-04 (e) 2.43E-04 (e) 2.19E-04 (e) I.13E-04 (e) 15.0 mrem 8.38E-04 (e)

(Orgean) 7.5 mrem 2.86E-04 (c) 3.26E-03 (c) 3.53E-03 (c) 1.49E-03 (c) 15.0 mrem 8.56E-03 (c)

Critical Organ Lung Thyroid Thyroid Thyroid Thyroid

2. Liquid Releases Maximum Doses from Aac atic Effluents Quarterly 15' QTR 2"" QTR 3 rd QTR 4 th QTR Yearly Obj. Annual Dose

_ _ __ _ _ _ Ob i. _ _ _ _ _ _ _ _ _ _ _ _

Total Body 1.5 mrem 9.66E-05 (c) O.OOE+00 (e) 0.OOE+O0 (e) 4.32E-05 (c) 3.0 mrem 1.40E-04 (c)

(mrem) _______ (a)

Organ 5.0 nrem 7.9-4(a) 0.OOE+00 (e) 0.OOE+O00(e) 5.61E-05 (a) 10.0 mrem 8.55E-04 (a)

I__ _ I__ _ I_

(m rem ) I _ _ _ _I_ _ _ _ _ _ _ _ _ _ _

Critical Organ GI_LLI None None GI_LLI GILLI

  • The doses reported include abnormal and unmonitored releases. These doses are the highest among the four analyzed receptors as described in parentheses [(i)=infant, (c)=child, (t)=teenager, (a)=adult, (e)=every receptor has the same value].

26

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBER: 50-010/50-237/50-249 Summary of Offsite Dose Calculation Manual (ODCM) Changes by Dresden Station in 2005 The Dresden ODCM was not revised in 2005.

27

DRESDEN NUCLEAR POWER STATION UNITS 1, 2 AND 3 RADIOACTIVE EFFLUENT RELEASE REPORT January Through December 2005 DOCKET NUMBER: 50-010/50-237/50-249 METEOROLOGICAL DATA

1. The following table represents the percentage of valid hours of recoverable meteorological data for 2005:

Percentage of valid parameter hours in 2005 Parameter I " Ouarter 2nd Ouarter 3d Ouarter 4 Ouarter Year 35 ft. Wind Speed 96.7% 99.9% 99.8% 99.9% 99.1%

150 ft. Wind Speed 99.7% 100.0% 100.0% 99.9% 99.9%

300 ft. Wind Sneed 98.1% 100.0% 99.9% 99.8% 99.4%

35 ft. Wind Direction 98.5% 99.2% 99.7% 99.8% 99.3%

150 ft. Wind Direction 99.8% 99.9% 99.9% 99.8% 99.9%

300 ft. Wind Direction 97.9% 99.8% 99.9% 99.8% 99.4%

35 ft. Temperature 99.9% 100.0% 100.0% 99.9% 99.9%

150-35 ft. delta T 99.9% 100.0% 99.9% 99.9% 99.9%

300-35 ft. delta T 99.9% -100.0% 100.0% 99.9% 99.9%

2. Dresden station was able to achieve an average of 99.6% meteorological data recovery for the year. This exceeds the minimum criterion of 90% delineated in Regulatory Guide 1.23.
3. The remaining pages of this report contain the Dresden Station meteorological site quarterly joint-frequency wind rose tables for 2005.

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Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Extremely Unstable - l5OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 5 0 0 0 8 NNE 0 5 2 0 0 0 7 NE 0 5 8 0 0 0 13 ENE 0 7 0 0 14 E 0 6 0 0 8 ESE 0 2 0 0 3 SE 0 1 0 0 1 SSE 0 0 0 0 1 S 0 0 1 0 1 SSW 0 0 0 0 1 SW 0 0 0 0 0 WSW 0 5 0 0 10 w 0 5 0 0 12 WNW 0 6 14 7 0 0 27 0 8 27 7 0 0 42 NNW 0 3 23 1 0 0 27 Variable 0 0 0 0 0 0 0 Total 0 39 105 30 1 0 175 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Moderately Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 3____ 1---

0--

N 0 3 1 0 4 NNE 0 3 0 0 3 NE 0 1 1 0 2 ENE 0 2 1 0 3 E 0 3 1 0 4 ESE 0 0 3 2 5 SE 0 0 0 0 0 SSE 0 0 0 0 0 S 0 1 0 0 5 SSW 0 1 1 0 2 SW 0 0 1 0 1 WSW 0 1 3 0 4 W 0 0 3 2 5 WNW 0 2 1 0 3 NW 0 2 8 1 11 NNW 0 5 1 0 6 Variable 0 o o 0 0 Total 0 24 25 5 4 0 58 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0o

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Slightly Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 NNE 1 NE 3 ENE 5 E 4 ESE 6 SE 1 SSE 4 S 3 SSW 4 SW 1 WSW 6 W 9 WNW 6 NW 13 NNW 12 Variable 0 Total 2 33 31 13 2 0 81 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0o

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Neutral - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 26 18 5 0 0 56 NNE 4 49 9 0 0 0 62 NE 3 36 46 15 0 0 100 ENE 2 33 29 0 0 0 64 E 4 31 30 0 0 0 65 ESE 3 14 46 23 0 0 86 SE 2 2 8 8 0 0 20 SSE 0 5 13 8 1 0 27 S 0 20 30 11 9 2 72 SSW 8 10 23 6 2 0 49 SW 2 8 7 9 1 0 27 WSW 2 13 8 6 2 0 31 W 3 18 18 13 2 0 54 WNW 6 19 26 11 0 0 62 NW 1 57 62 14 0 0 134 NNW 2 32 50 8 0 0 92 Variable 0 0 0 0 0 0 0 Total 49 373 423 137 17 2 1001 Hours of calm in this stability class: 0 Hours of missing wind measurements in this s tability class: 0 Hours of missing stability measurements in a:11 stability classes: 0

Dresden Nuclear Station Period of Record: January - March 2005 Stability C lass - Slightly Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 13 17 4 0 0 34 NNE 7 18 0 0 0 25 NE 8 15 4 0 0 27 ENE 6 16 5 0 0 27 E 8 23 3 0 0 34 ESE 5 12 10 0 0 27 SE 5 6 4 5 0 20 SSE 4 26 19 12 0 61 S 8 14 14 7 0 50 SSW 5 11 7 8 1 34 SW 3 18 7 9 0 38 WSW 1 9 5 7 0 22 W 6 14 6 2 0 28 WNW 5 20 12 2 0 39 NW 6 38 9 1 0 54 NNW 12 38 18 4 0 72 Variable 0 0 0 0 0 0 Total 102 295 127 57 10 1 592 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0o

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Moderately Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 o 0 0 0 0 NNE 4 1 0 0 0 0 5 NE 0 0 0 0 0 0 0 ENE 2 0 2 0 0 0 0 E 2 1 3 0 0 0 0 ESE 1 8 9 0 0 0 0 SE 2 4 6 0 0 0 0 SSE 3 2 5 1 0 0 0 S 3 7 11 0 0 0 0 SSW 4 9 13 9 0 0 0 SW 1 12 22 1 0 0 0 WSW 7 8 16 W 2 4 0 0 0 0 6 WNW 5 2 0 0 0 0 7 NW 4 0 0 0 0 0 4 NNW 9 5 0 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 49 63 11 0 0 0 123 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Extremely Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 2 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 1 0 2 ESE 1 0 4 SE 2 0 2 SSE 2 0 2 S 0 0 0 SSW 2 0 2 SW 1 0 5 WSW 4 0 5 W 2 0 2 WNW 3 0 3 NW 2 0 2 NNW 0 0 0 Variable 0 0 0 Total 22 0 31 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Extremely Unstable - 30OFt-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0

NNE 0 1 0

NE 0 2 0

ENE 0 1 0

E 0 0 0

ESE 0 0 0

SE 0 0 0

SSE 1 1 0

S 0 0 0 0

SSW 0 0 0

SW 0 0 0

WSW 0 0 0

W 0 2 0

WNW 2 6 0

NW 0 7 0

0 5 0

Variable 0 0 Total 0 0 5 17 1 3 26 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Moderately Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0

NNE 2 0

NE 4 0

ENE 3 0

E 3 0

ESE 0 0

SE 0 0

SSE 1 0

S 0 4 0

SSW 1 0

SW 0 0

WSW 4 0

W 3 0

WNW 4 0

NW 10 0

NNW 8 0

Variable 0 Total 0 4 13 18 5 8 48 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stab,ility class: 0 Hours of missing stability measurements in all 1stability classes: 2

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Slightly Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 NNE 0 2 NE 0 6 ENE 0 8 E 0 7 ESE 0 4 SE 0 1 SSE 0 2 S 1 1 SSW 0 1 SW 0 2 WSW 0 9 W 1 13 0 1 6 1 3 0 11 NW 0 0 12 8 1 3 24 NNW 0 1 3 4 1 0 9 Variable 0 0 0 0 0 0 0 Total 0 15 41 32 11 5 104 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Neutral - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 9 19 17 13 5 65 NNE 0 7 39 31 1 0 78 NE 2 9 25 37 10 0 83 ENE 2 17 28 20 0 0 67 E 1 13 33 29 2 0 78 ESE 1 10 15 43 20 2 91 SE 0 4 1 13 8 0 26 SSE 0 1 11 10 5 6 33 S 1 9 24 26 10 10 80 SSW 0 11 18 19 6 3 57 SW 2 6 7 8 6 4 33 WSW 1 9 10 9 5 4 38 W 0 10 18 22 14 11 75 WNW 3 11 27 29 18 4 92 NW 1 7 64 66 42 4 184 NNW 0 11 41 51 18 4 125 Variable 0 0 0 0 0 0 0 Total 16 144 380 430 178 57 1205 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 78 Hours of missing stability measurements in all stability classes: 2

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Slightly Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 10___ _____

N 1 1 17 10 2 31 0

NNE 1 2 15 10 0 28 0

NE 0 8 15 6 0 29 0

ENE 3 20 9 2 0 34 0

E 2 12 6 2 0 22 0

ESE 1 6 10 5 6 28 0

SE 0 3 14 4 5 26 SSE 3 5 11 16 17 3 55 S 2 6 9 21 10 14 62 SSW 1 4 2 9 10 6 32 SW 0 3 10 13 9 7 42 WSW 1 1 6 9 13 5 35 W 2 2 7 11 3 0 25 WNW 0 1 6 3 3 0 13 NW 0 3 18 26 0 0 47 NNW 0 3 13 17 5 5 43 Variable 0 0 0 0 0 0 0 Total 17 80 168 164 83 40 552 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 2

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Moderately Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 3 1 0 6 NNE 0 2 7 1 0 0 10 NE 1 1 0 1 0 0 3 ENE 2 2 0 0 0 0 4 E 1 4 0 0 0 0 5 ESE 2 0 0 1 0 0 3 SE 1 4 1 1 0 0 7 SSE 0 4 3 5 0 0 12 S 2 3 4 4 0 0 13 SSW 0 1 2 8 0 0 11 SW 0 0 1 8 3 0 12 WSW 0 0 3 9 2 0 14 W 0 0 3 3 0 0 6 WNW 0 2 7 1 0 0 10 NW 0 4 4 1 0 0 9 NNW 1 1 1 6 0 0 9 Variable 0 0 0 0 0 0 0 Total 10 30 36 52 6 0 134 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 2

Dresden Nuclear Station Period of Record: January - March 2005 Stability Class - Extremely Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 0 NE 0 0 ENE 0 0 E 0 0 ESE 0 0 SE 0 0 SSE 0 0 S 0 4 SSW 0 2 SW 0 0 WSW 0 0 W 0 2 WNW 0 0 NW 0 0 0 0 Variable 0 0 Total 0 8 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Extremely Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 12 2 0 21 NNE 0 11 1 4 0 16 NE 0 28 11 5 0 44 ENE 0 18 10 0 0 28 E 0 24 12 4 0 40 ESE 1 2 2 2 0 7 SE 0 3 1 2 0 6 SSE 0 8 3 2 0 13 S 1 10 20 6 0 43 SSW 0 13 6 2 0 21 SW 0 11 5 2 0 20 WSW 0 9 33 11 0 53 W 0 11 14 14 0 39 WNW 2 3 24 5 0 35 NW 0 7 13 7 0 27 NNW 1 9 9 7 0 26 Variable 0 0 0 0 0 0 Total 6 173 176 75 9 0 439 Hours of calm in this stability class: 0 Hours of missing wind measurements in this si:ability class: 0 Hours of missing stability measurements in a.Ll stability classes: 0

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Moderately Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 1 NNE 0 1 1 0 2 NE 1 0 0 0 8 ENE 2 0 0 0 5 E 1 2 0 0 8 ESE 1 0 0 4 SE 0 1 0 3 SSE 0 1 0 4 S 1 1 0 8 SSW 1 4 0 10 SW 0 2 0 6 WSW 0 1 0 8 W 0 4 0 8 WNW 0 0 0 6 NW 0 0 0 0 NNW 0 2 0 4 Variable 0 0 0 0 Total 7 36 24 18 0 0 85 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Slightly Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 0 0 2 NNE 1 0 2 2 0 0 5 NE 1 3 3 0 0 0 7 ENE 1 3 0 0 0 0 4 E 1 6 2 2 0 0 11 ESE 6 0 14 SE 1 0 4 SSE 4 0 9 S 2 0 9 SSW 1 0 5 SW 2 0 9 WSW 4 0 7 W 0 0 4 WNW 0 0 4 NW 1 0 4 NNW 0 0 Variable 0 0 0 0 Total 7 34 36 21 0 99 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Neutral - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 4 5 2 0 14 NNE 1 9 15 7 0 32 NE 4 21 26 2 0 53 ENE 2 32 6 0 0 40 E 5 22 26 10 0 63 ESE 3 14 9 11 0 37 SE 5 10 22 0 0 37 SSE 2 19 15 3 0 39 S 3 11 13 6 0 35 SSW 4 12 20 8 0 44 SW 3 10 13 2 0 28 WSW 1 9 12 7 0 29 w 3 7 27 6 0 43 WNW 0 7 27 8 0 42 NW 1 6 9 0 0 16 NNW 2 3 8 1 0 14 Variable 0 0 0 0 o o Total 42 196 253 73 0 566 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Slightly Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 4 4 0 0 17 NNE 14 15 10 0 0 39 NE 5 33 7 0 0 45 ENE 7 37 0 0 0 44 E 9 42 9 5 0 65 ESE 1 38 16 12 0 67 SE 4 18 15 1 0 38 SSE 6 31 15 8 0 60 S 6 35 29 8 0 78 SSW 6 17 7 8 0 38 SW 6 17 7 2 0 32 WSW 2 7 15 1 0 25 W 4 18 21 0 0 43 WNW 5 25 10 2 0 42 NW 9 11 6 0 0 26 NNW 6 3 4 0 0 13 Variable 0 0 0 0 0 0 Total 99 351 175 47 0 672 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Moderately Stable - l50Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 3 0 0 0 0 12 NNE 4 5 0 0 0 0 9 NE 3 1 0 0 0 0 4 ENE 1 2 0 0 0 0 3 E 4 12 1 0 0 0 17 ESE 4 15 2 0 0 0 21 SE 5 9 1 0 0 0 15 SSE 5 6 0 0 0 0 11 S 6 11 0 0 0 0 17 SSW 4 10 2 0 0 0 16 SW 8 16 0 0 0 0 24 WSW 10 6 0 0 0 0 16 W 8 8 0 0 0 0 16 WNW 5 0 0 0 0 0 5 NW 11 0 0 0 0 0 11 NNW 11 0 0 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 98 104 6 0 0 0 208 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0o

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Extremely Stable - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 NNE 0 1 0 0 0 0 NE 0 0 0 0 0 0 ENE 0 1 0 0 0 0 E 1 3 0 0 0 0 ESE 6 6 1 0 0 0 SE 0 4 0 0 0 0 SSE 0 1

_ _ _ 0_ _ _ 0_ _ _ 0_ _ 0_

S 1 7 0 0 0 0 SSW 5 13 0 0 0 0 SW 13 17 0 0 0 0 WSW 1 4 0 0 0 0 W 1 1 0 0 0 0 WNW 0 2 0 0 0 0 NW 0 6 0 0 0 0 NNW 0 3 0 0 0 0 Variable 0 0 Total 42 28 1 0 0 0 71 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Extremely Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 2 3 0 6 0

NNE 0 1 5 4 1 11 0

NE 2 6 2 3 0 13 0

ENE 2 5 0 0 0 7 0

E 0 4 3 1 0 8 0

ESE 0 0 0 0 0 0 0

SE 0 0 0 0 0 0 0

SSE 1 0 0 0 0 1 0

S 0 1 0 0 0 1 00 SSW 1 0 2 0 0 3 0

SW 0 0 2 0 0 2 0

WSW 0 1 4 4 0 9 0

W 0 0 2 0 2 4 0

WNW 0 0 1 0 0 1 0

NW 0 1 4 4 2 11 0

NNW 0 2 0 1 0 3 0

Variable 0 0 0 0 0 0 Total 0 6 22 27 20 5 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Moderately Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 1 NNE 0 1 3 2 1 7 NE 0 4 3 0 0 7 ENE 5 5 0 0 0 10 E 3 7 1 1 0 12 ESE 1 0 0 1 0 2 SE 0 0 3 0 0 3 SSE 1 1 1 0 0 3 S 1 6 3 2 0 12 SSW 2 3 0 0 0 5 SW 2 4 0 0 0 6 WSW 5 0 9 1 1 16 W 0 1 3 2 0 7 WNW 0 2 7 3 1 13 NW 0 1 3 1 0 5 NNW 0 4 1 4 1 10 Variable 0 0 0 0 0 0 Total 1 20 39 38 17 4 119 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Slightly Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 3 0 0 3 NNE 0 0 2 0 3 2 7 NE 0 6 5 1 2 0 14 ENE 0 6 7 0 0 0 13 E 0 4 9 2 3 0 18 ESE 1 2 3 2 0 0 8 SE 0 2 2 2 0 0 6 SSE 0 1 3 6 0 0 10 S 0 3 6 4 2 2 17 SSW 0 1 0 1 3 0 5 SW 0 4 1 0 2 2 9 WSW 0 2 4 6 1 0 13 W 0 0 1 8 2 0 11 WNW 0 1 1 10 2 1 15 NW 0 1 2 4 3 0 10 NNW 0 0 1 0 4 0 5 Variable 0 0 0 0 0 0 0 Total 1 33 47 49 27 7 164 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Neutral - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 8 18 4 30 NNE 3 5 6 13 15 6 48 NE 1 6 22 22 15 0 66 ENE 3 27 27 8 0 0 65 E 5 16 37 20 9 11 98 ESE 2 9 14 10 11 7 53 SE 5 11 26 7 0 0 49 SSE 1 12 17 16 4 0 50 S 0 10 23 19 7 4 63 SSW 2 12 15 21 10 2 62 SW 0 11 8 12 6 0 37 WSW 1 8 13 19 9 6 56 W 0 7 9 27 24 3 70 WNW 0 3 4 31 16 8 62 NW 1 1 5 18 2 1 28 NNW 0 0 1 3 17 1 22 Variable 0 0 0 0 0 0 0 Total 24 138 227 254 163 53 859 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Slightly Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 2 2 0 0 10 NNE 6 11 12 10 0 40 NE 8 16 19 2 0 47 ENE 11 23 4 0 0 42 E 4 17 20 2 1 46 ESE 1 5 20 10 0 36 SE 6 18 36 3 0 63 SSE 3 19 15 6 2 45 S 1 12 45 25 3 87 SSW 7 8 31 9 4 60 SW 7 7 19 8 1 42 WSW 3 7 15 7 1 33 W 6 8 25 6 0 46 WNW 1 11 15 6 0 34 NW 1 9 8 8 0 27 NNW 5 5 2 1 0 13 Variable 0 0 0 0 0 0 Total 16 74 178 288 103 12 671 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Moderately Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 0 5 NNE 1 6 0 12 NE 5 5 0 15 ENE 2 1 0 6 E 3 0 0 10 ESE 3 7 0 14 SE 4 19 0 28 SSE 13 7 0 24 S 6 3 0 12 SSW 6 7 0 23 SW 4 13 0 21 WSW 8 13 0 25 W 3 2 0 9 WNW 5 11 0 20 NW 8 0 0 14 NNW 3 0 0 4 Variable 0 0 0 0 Total 15 37 75 96 19 0 242 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: April - June 2005 Stability Class - Extremely Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0

NNE 2 0 0 0 2 0

NE 0 2 0 0 2 0

ENE 1 0 0 0 1 0

E 1 0 0 0 1 0

ESE 0 0 0 0 0 0

SE 0 0 1 2 3 0 0 SSE 1 0 4 1 6 S 1 1 1 0 0 3 SSW 0 1 1 1 0 3 SW 0 1 3 3 1 8 WSW 0 2 5 4 0 11 W 0 1 0 0 0 1 WNW 0 0 0 0 0 0 NW 0 0 0 0 0 0 NNW 0 0 1 0 0 1 Variable 0 0 0 0 0 0 Total 1 11 13 13 4 0 42 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Extremely Unstable - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 15 0 0 0 0 16 NNE 1 12 5 0 0 0 18 NE 1 18 14 0 0 0 33 ENE 6 19 4 0 0 0 29 E 2 6 8 0 0 0 16 ESE 0 5 2 1 0 0 8 SE 0 7 4 0 0 0 11 SSE 0 7 5 0 0 0 12 S 1 6 9 1 0 0 17 SSW 0 11 21 7 0 0 39 SW 0 11 6 5 0 0 22 WSW 0 12 2 0 0 0 14 W 0 12 9 1 0 0 22 WNW 0 14 11 1 0 0 26 NW 1 21 5 0 0 0 27 NNW 2 24 1 0 0 0 27 Variable 0 0 0 0 0 0 0 Total 15 200 106 16 0 0 337 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Moderately Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 3 0 0 5 0 0 NNE 0 1 2 0 0 NE 1 0 3 0 0 ENE 1 5 6 0 0 E 1 5 8 0 0 ESE 0 1 2 0 0 SE 0 3 5 0 0 SSE 0 3 3 0 0 S 0 4 7 00 SSW 0 0 1 8 0

SW 0 6 1 9 0

WSW 1 8 0 11 0

W 0 4 0 5 0

WNW 0 7 0 9 0

NW 1 5 0 7 0

NNW 2 3 0 6 0

Variable 0 0 0 0 Total 9 58 27 2 0 0 96 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Slightly Unstable - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 2____ _____

N 2 0 0 0 0 0 2 NNE 1 0 0 0 0 3 2

NE 0 6 2 0 0 0 8 ENE 1 3 1 0 0 0 5 E 0 4 1 0 0 0 5 ESE 0 2 0 0 0 0 2 SE 0 3 0 0 0 0 3 SSE 0 5 0 0 0 0 5 S 0 1 4 0 0 0 5 SSW 1 4 4 1 0 0 10 SW 0 3 2 0 0 0 5 WSW 0 7 2 0 0 0 9 W 0 4 3 0 0 0 7 WNW 1 5 0 0 0 0 6 NW 1 2 0 0 0 0 3 NNW 0 4 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 8 54 19 1 0 0 82 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Neutral - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 4 1 0 14 0 0 NNE 4 14 2 0 20 0 0 NE 4 33 11 0 48 0 0 ENE 0 19 2 0 21 0 0 E 4 20 6 0 30 0 0 ESE 5 10 6 0 21 0 0 SE 11 9 4 0 24 0 0 SSE 5 18 13 0 36 0

S 7 18 18 1 0 0 44 0

SSW 3 18 18 5 0 44 0

SW 5 10 5 2 0 22 0

WSW 6 15 4 1 0 26 0

W 1 13 3 0 0 17 0

WNW 7 14 6 0 0 27 0

NW 8 13 6 0 0 27 0

NNW 8 9 0 0 0 17 0

Variable 0 0 0 0 0 0 Total 87 237 105 9 0 0 438 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Slightly Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 24 11 1 0 0 0 36 NNE 25 36 0 0 0 0 61 NE 15 34 6 0 0 0 55 ENE 14 38 2 0 0 0 54 E 9 53 4 0 0 0 66 ESE 12 27 4 0 0 0 43 SE 6 27 11 0 0 0 44 SSE 14 36 20 0 0 0 70 S 12 38 25 1 0 0 76 SSW 9 20 18 2 0 0 49 SW 9 9 6 1 0 0 25 WSW 10 11 2 0 0 0 23 W 17 16 4 0 0 0 37 WNW 14 26 0 0 0 0 40 NW 15 18 5 2 0 0 40 NNW 25 15 1 0 0 0 41 Variable 0 0 0 0 0 0 0 Total 230 415 109 6 0 0 760 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Moderately Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 17 0 17 0 0 0 0 NNE 13 0 13 0 0 0 0 NE 3 1 4 0 0 0 0 ENE 2 0 2 0 0 0 0 E 3 9 12 0 0 0 0 ESE 11 12 23 3 0 0 0 SE 8 13 24 1 0 0 0 SSE 7 27 35

_ 1

__ _ _ 0_ _ _ 0_ _ _ 0_

S 18 16 35 0 0 0 0 SSW 14 11 25 1 0 0 0 SW 14 9 24 0 0 0 0 WSW 11 4 15 0 0 0 0 W 6 6 12 0 0 0 0 WNW 13 4 17 0 0 0 0 NW 28 a 28 0 0 0 0 NNW 30 0 30 0 0 0 0 Variable 0 0 0 Total 198 112 6 0 0 0 316 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Extremely Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 1 0 0 0 0 NNE 4 0 4 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 7 1 8 0 0 0 0 SE 1 4 5 0 0 0 0 SSE 2 2 4 0 0 0 0 S 7 4 0 0 0 0 11 0 0 0 0 SSW 8 2 10 0 0 0 0 SW 16 3 19 0 0 0 0 WSW 7 1 8 0 0 0 0 W 3 0 3 0 0 0 0 WNW 8 0 8 0 0 0 0 NW 19 2 21 0 0 0 0 NNW 9 0 9 0 0 0 0 Variable 0 0 0 Total 92 19 0 0 0 0 111 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Extremely Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 0

NNE 0 14 0

NE 0 9 0

ENE 0 2 0

E 0 3 0

ESE 0 0 0

SE 0 1 0

SSE 0 2 0

S 0 0 3 0

SSW 0 8 0

SW 0 4 0

WSW 0 3 0

W 0 9 0

WNW 0 4 0

NW 0 6 0

NNW 1 0 7 0

Variable 0 0 0 0 Total 0 15 28 37 0 0 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes:

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Moderately Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 6 0 0 0 9 NNE 0 1 2 1 0 0 4 NE 0 2 2 3 0 0 7 ENE 1 7 7 0 0 0 15 E 0 2 3 1 0 0 6 ESE 0 1 0 0 0 0 1 SE 0 1 3 0 0 0 4 SSE 0 1 2 0 0 0 3 S 0 3 3 0 0 0 6 SSW 0 3 0 6 2 0 11 SW 0 5 2 4 0 0 11 WSW 0 4 4 1 0 0 9 W 0 1 2 2 0 0 5 WNW 0 0 3 3 1 0 7 NW 0 2 6 1 0 0 9 NNW 0 3 5 2 0 0 10 Variable 0 0 0 0 0 0 0 Total 1 39 50 24 3 0 117 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Slightly Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 4 0 0 0 6 NNE 0 1 3 0 0 5 NE 1 3 3 1 0 0 8 ENE 1 5 5 1 0 0 12 E 0 4 6 1 0 0 11 ESE 0 5 2 0 1 0 8 SE 0 4 5 0 0 0 9 SSE 0 4 4 0 0 0 8 S 0 1 5 3 0 0 9 SSW 0 4 6 8 0 0 18 SW 0 0 2 2 2 0 6 WSW a 6 2 1 1 0 10 W 0 6 3 2 0 0 11 WNW a 8 7 5 0 0 20 NW 0 4 9 3 0 0 16 NNW 0 8 2 0 0 11 Variable 0 0 0 0 0 0 0 Total 2 65 68 28 5 0 168 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Neutral - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 i1-7 8-12 13-18 19-24 > 24 Total N 2 6 8 9 0 27 NNE 1 7 5 23 0 43 NE 0 10 31 29 0 72 ENE 0 23 32 2 0 57 E 0 12 19 12 0 43 ESE 7 15 9 2 0 33 SE 2 13 7 5 0 27 SSE 3 21 17 11 0 52 S 3 10 21 25 0 59 SSW 3 16 28 16 0 67 SW 3 15 10 8 0 40 WSW 6 16 6 4 0 33 W 2 7 10 8 0 28 WNW 1 9 16 10 0 37 NW 3 18 14 10 3 50 NNW 1 13 10 10 1 35 Variable 0 0 0 0 0 0 Total 37 211 243 184 24 4 703 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: I Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Slightly Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 4 14 18 0 0 37 NNE 0 6 18 34 1 0 59 NE 0 5 21 10 0 0 36 ENE 1 29 17 2 0 0 49 E 1 7 28 16 6 0 58 ESE 0 7 19 16 2 0 44 SE 0 8 21 23 0 0 52 SSE 0 11 23 35 3 0 72 S 1 10 29 37 17 0 94 SSW 0 8 23 25 11 0 67 SW 1 4 7 7 6 1 26 WSW 0 4 9 9 1 0 23 W 2 10 13 10 0 0 35 WNW 0 7 9 14 0 0 30 NW 0 5 11 11 0 0 27 NNW 2 5 9 9 1 0 26 Variable 0 0 0 0 0 0 0 Total 9 130 271 276 48 1 735 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 1

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Moderately Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 9 2 1 0 17 NNE 3 10 10 0 0 25 NE 10 7 2 0 0 19 ENE 5 2 0 0 0 7 E 6 8 1 3 0 20 ESE 1 5 4 1 0 11 SE 5 6 8 1 0 20 SSE 4 17 13 2 0 37 S 6 19 17 4 0 48 SSW 2 10 10 4 0 28 SW 5 14 9 0 0 28 WSW 3 7 5 0 0 18 W 3 6 6 0 0 16 WNW 1 6 4 0 0 11 NW 0 7 9 0 0 18 NNW 1 1 2 2 0 8 Variable 0 0 0 0 0 0 Total 18 59 134 102 18 0 331 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: I

Dresden Nuclear Station Period of Record: July - September 2005 Stability Class - Extremely Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 3 5 NNE 0 3 1 2 6 NE 0 0 0 1 1 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 0 SE 0 0 1 0 1 SSE 0 0 2 0 2 S 0 2 1 2 7 SSW 0 2 0 3 7 SW 0 0 1 10 11 WSW 0 0 1 0 1 W 0 0 1 5 6 WNW 0 0 0 0 0 NW 0 0 0 0 2 NNW 0 0 0 3 5 Variable 0 0 0 0 0 Total 0 8 8 29 9 0 54 Hours of calm in this stability class: 0 Hours of missing wind measurements in this sltability class: 2 Hours of missing stability measurements in a.11 stability classes: 1

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Extremely Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 5 0 0 0 12 NNE 1 2 3 0 0 0 6 NE 1 11 10 0 0 0 22 ENE 1 4 4 0 0 0 9 E 0 1 5 0 0 0 6 ESE 0 0 0 3 0 0 3 SE 0 0 1 1 0 0 2 SSE 0 0 1 0 0 0 1 S 0 0 1 2 0 0 3 SSW 0 2 5 10 0 0 17 SW 0 3 4 4 1 0 12 WSW 1 5 7 2 2 0 17 W 0 6 15 2 2 0 25 WNW 0 3 23 1 0 0 27 NW 0 6 15 3 1 0 25 NNW 1 12 7 0 1 0 21 Variable 0 0 0 0 0 0 0 Total 5 62 106 28 7 0 208 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Moderately Unstable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 NNE 1 NE 2 ENE 3 E 1 ESE 1 SE 0 SSE 3 S 5 SSW 10 SW 3 WSW 4 W 6 WNW 7 NW 4 NNW 9 Variable 0 Total 1 22 30 8 1 0 62 Hours of calm in this stability class: 0 Hours of missing wind measurements in this sltability class: 0 Hours of missing stability measurements in a.11. stability classes: 0

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Slightly Unstable - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 NNE 4 NE 1 ENE 0 E 5 ESE 0 SE 0 SSE 4 S 7 SSW 6 SW 6 WSW 5 W 11 WNW 6 NW 3 NNW 1 Variable 0 Total 4 26 19 12 0 0 61 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Neutral - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 8 4 0 0 0 14 NNE 2 9 2 0 0 0 13 NE 2 21 5 0 0 0 28 ENE 2 17 7 0 0 0 26 E 5 25 29 0 0 0 59 ESE 2 14 18 4 0 0 38 SE 1 4 13 8 0 0 26 SSE 1 5 15 3 0 0 24 S 1 10 17 16 5 0 49 SSW 0 7 16 24 2 0 49 SW 2 8 20 17 3 0 50 WSW 4 14 11 11 9 0 49 W 3 21 40 15 13 0 92 WNW 1 25 25 18 0 0 69 NW 3 21 22 7 0 0 53 NNW 5 14 21 4 0 0 44 Variable 0 0 0 0 0 0 0 Total 36 223 265 127 32 0 683 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Slightly Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 12 16 3 1 0 0 32 NNE 20 9 1 0 0 0 30 NE 6 15 3 0 0 0 24 ENE 4 5 4 0 0 0 13 E 0 13 5 0 0 0 18 ESE 9 11 7 3 0 0 30 SE 6 15 19 7 1 0 48 SSE 11 32 25 3 0 0 71 S 7 48 67 16 8 0 146 SSW 6 14 40 14 4 0 78 SW 10 15 18 3 0 0 46 WSW 6 15 11 3 1 0 36 W 15 50 29 7 0 0 101 WNW 21 53 16 9 0 0 99 NW 16 18 5 0 0 0 39 NNW 11 47 26 1 0 0 85 Variable 0 0 0 0 0 0 0 Total 160 376 279 67 14 0 896 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0o

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Moderately Stable - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 0 9 0 0 0 0 NNE 3 1 4 0 0 0 0 NE 2 0 2 0 0 0 0 ENE 0 1 1 0 0 0 0 E 0 0 0 0 0 0 0 ESE 1 2 3 0 0 0 0 SE 4 4 8 0 0 0 0 SSE 5 10 15 9 0 0 0 S 12 16 0 0 0 0 37 0 0 0 0 SSW 11 18 29 2 0 0 0 SW 8 12 22 0 0 0 0 WSW 7 5 12 0 0 0 0 W 6 2 8 0 0 0 0 WNW 5 3 8 0 0 0 0 NW 8 15 23 0 0 0 0 NNW 10 2 12 0 0 0 0 Variable 0 0 0 Total 91 91 11 0 0 0 193 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Extremely Stable - 15OFt-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 1 NNE 0 a 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 3 3 SE 1 0 1 SSE 5 0 5 S 4 1 5 SSW 2 5 7 SW 3 23 26 WSW 2 2 4 W 3 1 4 WNW 5 1 6 NW 10 0 10 NNW 6 1 7 Variable 0 0 0 Total 42 37 0 0 0 0 79 Hours of calm in this stability class: 0 Hours of missing wind measurements in this si:ability class: 0 Hours of missing stability measurements in a:11 stability classes: 0

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Extremely Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 NNE 2 NE 10 ENE 1 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 1 WSW 1 W 1 WNW 7 NW 4 NNW 5 Variable 0 Total 0 0 11 18 2 3 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Moderately Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 NNE 1 NE 8 ENE 1 E 0 ESE SE 0 SSE 0 S 0 SSW 7 SW 5 WSW 7 W 7 WNW 10 NW 6 NNW 6 Variable 0 Total 0 4 17 31 3 8 63 Hours of calm in this stability class: a Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 3

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Slightly Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 1 0 0 4 0

NNE 0 0 0 1 0 1 0 4 NE 1 2 0 0 0 3 0

ENE 0 2 2 0 0 4 0

E 0 1 0 0 0 1 0

ESE 0 0 0 0 0 0 0

SE 0 1 0 0 0 1 0

SSE 0 4 1 0 0 5 0

S 0 2 2 1 0 5 0

SSW 0 1 8 5 0 14 0

SW 1 1 1 0 0 3 0

WSW 1 4 1 1 1 8 0

W 0 5 2 0 1 8 WNW 1 1 3 3 1 1 10 NW 0 2 2 2 0 0 6 NNW 0 2 1 4 1 0 8 Variable 0 0 0 0 0 0 0 Total 1 9 31 27 10 3 81 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Neutral - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 9 18 6 2 42 NNE 5 10 13 3 0 34 NE 1 17 6 0 0 24 ENE 9 30 13 0 0 52 E 9 18 37 0 0 65 ESE 1 18 10 3 2 36 SE 1 7 18 19 2 48 SSE 3 10 18 14 1 46 S 6 18 30 19 8 82 SSW 4 11 24 26 4 70 SW 9 18 11 18 10 68 WSW 9 16 14 12 14 66 W 17 37 47 32 23 157 WNW 8 37 27 27 12 112 NW 9 23 32 4 8 76 NNW 10 12 50 11 3 86 Variable 0 0 0 0 0 0 Total 17 105 291 368 194 89 1064 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 3

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Slightly Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 12 16 6 0 39 NNE 1 7 15 3 0 0 26 NE 0 5 12 7 0 0 24 ENE 2 10 3 0 0 0 15 E 0 1 11 1 0 0 13 ESE 1 1 13 4 0 0 19 SE 1 2 5 10 0 3 21 SSE 1 3 8 23 9 0 44 S 0 2 11 49 38 11 111 SSW 0 3 12 36 48 10 109 SW 1 4 9 15 11 0 40 WSW 3 5 11 9 2 3 33 W 0 7 17 27 3 0 54 WNW 0 4 28 39 10 1 82 NW 2 3 10 18 6 0 39 NNW 1 9 3 16 16 0 45 Variable 0 0 0 0 0 0 0 Total 13 71 180 273 149 28 714 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 3

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Moderately Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 4 NNE 2 o 9 NE 2 0 4 ENE 0 0 7 E 0 0 0 ESE 0 0 1 SE 0 0 3 SSE 3 0 12 S 2 0 16 SSW 23 0 30 SW 11 0 17 WSW 18 0 27 W 17 0 27 WNW 0 0 4 NW 7 0 24 NNW 5 0 12 Variable 0 0 0 Total 4 30 53 91 19 0 197 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: es Hours of missing stability measurements in all stability classes: 3

Dresden Nuclear Station Period of Record: October - December2005 Stability Class - Extremely Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 3 4 0 7 0

NNE 0 1 3 3 0 7 0

NE 1 1 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 00 SSW 0 1 4 1 0 6 0

SW 1 0 3 1 0 5 a

WSW 1 0 2 0 0 3 0

W 1 1 2 2 0 6 0

WNW 0 1 0 0 0 1 0

NW 0 2 1 0 0 3 0

NNW 0 2 4 0 0 6 0

Variable 0 0 0 0 0 0 Total 0 4 8 22 11 0 45 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

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