Text

Corrected 2017 Radioactive Effluent Release Report
	ML18180A145
Person / Time
Site:	Dresden
Issue date:	06/28/2018
From:	Karaba P; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
	SVPLTR 18-0020
	Download: ML18180A145 (140)
	v • d • e

jM t/___,.

~= 7 Exelon Generation Dresden Nuclear Power Station 6500 North Dresden Road Morris, IL 60450 10 CFR 50.36a (a)(2)

June 28, 2018 SVPLTR: #18-0020 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555-0001 Dresden Nuclear Power Station, Units 1, 2 and 3 Facility Operating License No. DPR-2 Renewed Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket Nos.50-010, 50-237. and 50-249

Subject:

Corrected Dresden Nuclear Power Station 2017 Radioactive Effluent Release Report The Radioactive Effluent Release Report for January through December 2017 for Dresden Nuclear Power Station (DNPS) is submitted in accordance with Sections 6.9.A.4 and 5.6.3, "Radioactive Effluent Release Report," of the DNPS Unit 1 and Units 2 and 3 Technical Specifications, respectively and 10 CFR 50.36a (a)(2), "Technical specifications on effluents from nuclear power reactors." Due to a discrepancy in the attachments of the original submittal, a corrected copy is being provided.

Should you have any questions concerning this letter, please contact Mr. Bruce Franzen, Regulatory Assurance Manager, at (815) 416-2800.

Respectfully,

~

Peter J. Karaba Site Vice President Dresden Nuclear Power Station

Attachments:

1. DNPS 2017 Annual Radioactive Effluent Release Report

2. Dresden Station Offsite Dose Calculation Manual, Revision 13

3. RW-AA-100, Process Control Program for Radioactive Wastes, Revision 12 cc: Regional Administrator- NRC Region Ill NRC Senior Resident Inspector, DNPS

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 SUPPLEMENTAL INFORMATION DOCKETNUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 I. Regulatory Limits Licensee: Exelon Nuclear

a. Fission and activation gases:

Dose Rate (site}

(I) Less !l1a11 500 mrem/year to the whole body.

(2) Less than 3000 mrem/year to the skin.

Gamma Air Dose (eaeh unit)

(I) Less than or equal to 5 mrad/quarter.

(2) Less than or equal to JO mrad/year.

Beta Air Dose (each unit)

(1) Less than or equal to JO mrad/quartcr.

(2) .Less than or equal to 20 mrad/year.

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

Dose Rate (site)

(]) Less than 1500 mrem/year to any organ.

Dose (each unit)

(I) Less than or equalto 7.5 mrem/quarter to any organ.

(2) Less than or equal to 15 mrem/year to any organ.

d. Liquid effluents (each unit):

(l) 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 1m-em to the whole body during any calendar year.

(4) Less than or equal to 10 mrem to any organ during any calendar year.

e. 40CFRI 90 and 10CFR72 (all uranium fuel cycle operations in the region):

(I) Less than or equal to 25 mrem annual whole body dose.

(2) Less than or equal to 75 mrem annual thyroid dose.

(3) Less than or equal to 25 mrem annual dose to any other critical organ.

2. Effluent Concentration Limits Dose rates, rather than effluent concentrations, are used to calculate permissible release rates for gaseous effluents. The maximum permissible dose rates for gaseous releases are defined in Dresden Offsite Dose Calculation Manual (ODCM)

Radiological Effluent Control (REC) 12.4.1.

Liquid effluent concentrations are limited per ODCM REC 12.3.l to JO times the concentration specified in I0CFR20 Appendix B, Table 2, Column 2 for radionuclides other than dissolved or entraiued noble gases and 2.00E-04 µCi/ml total activity for all dissolved or entrained noble gases.

Page I of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 SUPPLEMENTAL INFORMATION 50-010/50-237/50-249 DOCKET NUMBERS:

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

3. Average Energy The ODCM limits dose rates at or beyond the site boundary due to the release of noble 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, and average energy is not used to determine dose to the public. Compliance with these limits is demonstrated based on dose calculations using measured isotopic concentrations of effluent streams and not based on gross count rate measuring systen1s.

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.

4. Measurement and Approximations of Total Radioactivity

a. Fission and Activation Gases:

b. Iodines:

c. Particulates:

d. Tritium:

e. Gross Alpha The 2/3 Chimney, 2/3 Reactor Building Vent, and Chemical Cleaning Building effluents are continuously sampled for iodines and paiticulates. 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, Sr-90, and Fe-55 analysis. Noble gas grab samples of the 2/3 Chimney and 2/3 Reactor Building Vent are obtained weekly and analyzed by gamma spectroscopy. Contributing streams of the 2/3 Chimney and 2/3 Reactor Building Vent are also sampled and analyzed by gamma spectroscopy.

Tritium samples of the 2/3 Chimney and 2/3 Reactor Building Vent are obtained monthly and analyzed by liquid scintillation.

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

f. Carbon-14:

Carbon-14 activity released is estimated using Electric Power Research Institute Technical Report 1021106 Boiling Water Reactor proxy values (5.1 Ci per GWth year, Section 3.7) and the rated thermal capacity maintained for the entire calendar year. Resultant dose is calculated using approved methodologies.

g. Liquid Effluents:

The river discharge tank is analyzed for gamma-emitting 11Uclides 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 dtuing the calendar month. The composite is sent to a vendor for analyses of gross alpha, Sr-89, Sr-90, and Fe-55.

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

Containment Cooling Service Water (CCSW) is sampled from the Low Pressure Coolant Injection (LPCI) heat exchangers monthly and analyzed for gamma-emitting nuclides by gamma spectroscopy. These samples are composited quarterly and analyzed for tritium, gross alpha, Sr-89, Sr-90, Fe-55, and Ni-63. Results from the quarter are conservatively applied for each month of the quarter. Batch release volume is based on LPCI heat exchanger volume.

h. Estimated Total Errors:

Page 2 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 SUPPLEMENTAL INFORMATION DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear The estimated total errors were calculated as the square root of the sum of the squares of significant errors present in the sampling and analysis process.

1. 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.

5. Batch Releases (does not include Abnormal/ Unmonitored Releases described below in points 6 and 7)

a. Liquid - Raclwaste Liquid Effluents - None Liquid - CCSW/LPCI

(]) Number of batch releases: ()

(2) Total time period for batch releases: O.OOE+OO minutes (3) Maximum time period for a batch release: O.OOE+OO minutes (4) Average time period for a batch release: O.OOE+OO minutes (5) Minimum time period for a batch release: O.OOE+OO minutes (6) Average stream flow during periods of release of effluent into a flowing stream: O.OOE+OO 1pm

b. Gaseous - None

.* 6. Abnormal Releases (reported in Summation of all Releases tables as well as in Radiological Impact on Man section)

a. Liquid (l) Number of releases: 0 (2) Total activity released: O.OOE+OO Ci

b. Gaseous (1) Number of releases: 0 (2) Total activity released: O.OOE+OO Ci

7. Unmonitored Releases (reported in Summation of all Releases tables as well as in Radiological Impact on Man section)

a. Liquid (I) Number of releases: l (examples: Storm Sewer System, Sewage Treatment Plant Effluent)

(2) Total activity released: 1.76E-01 Ci Water in on-site storm sewers is routinely sampled and analyzed for tritium content. The highest storm drain concentrations of tritium measmed during each month of 2017 were used to calculate the released activity for each month.

The total activity released to the environment is based on an estimated typical discharge flow of 10 gallons per minute.

Low level tritium was detected tlu*oughout the year 2017. The total estimated tritium activity released via the storm sewers in 2017 was l.76E-01 Ci.

Water in the Sewage Treatment Plant (STP) effluent is routinely sampled and analyzed for tritium, gross alpha, Sr-89, Sr-90, Fe-55, and Ni-63. Tritium was not detected in the STP effluent in 2017. All other nuclide values were less than the Lower Limit of Detection (<LLD).

The estimated close from these liquid releases was weH below regulatory limits.

Page 3 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 SUPPLEMENTAL INFORMATION DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

b. Gaseous Cl) Number of releases: 4 (examples: Unit I Main Turbine Floor and Unit 1 Fuel Building, Chemistry Laboratory Ventilation Ef!1uent, Units 2/3 Heating Steam System, East Turbine Bui1ding Ventilation, and Isolation Condenser Actuation)

(2) Total activity released: 1.42E-04 Ci The Unit 1 Main Turbine Floor is used as an area to work on contaminated equipment. The Unit I Fuel Building .is used as a storage area and potentially as a work area. The ventilation systems to these areas are no longer operational and the areas are at ambient pressure with the outside environment. The potential exists for airborne activity to be released to the environment through various points. Based on the work normally performed in these areas, an estimated 7 .20E-05 Ci of Cs-137 was released via this path during 2017.

The Chemistry Laboratory exhausts directly into the environment via its ventilation system. This release path is not monitored. Based on an evaluation of activities petformed in the area, the estimated activity released to the environment from the laboratory in 2017 is 4.64E-05 Ci.

The Unit 2/3 Heating Steam System has been contaminated in the past. The system continues to contain low-level contamination. During normal operation, the condensate is converted to steam, a portion of which gets vented to the atmosphere. Tritium was the only nuclide detected in 2017. An estimated l.8 lE-05 Ci of activity was released to the environment during 2017.

The East Turbine Building Ventilation System exhausts directly into the environment. This release path is not monitored.

Low-level removable contamination has been detected in the system in the past. An estimated 2.20E-06 Ci of Co-60 a n d .

2.78E-06 Ci of Cs-137 was released to the environment during 2017.

No Isolation Condenser actuations occurred in 2017.

The estimated dose from these gaseous releases was well below regulatory limits.

8. Summary of Offsite Dose Calculation Manual (ODCM) Changes by Dresden Nuclear Power Station (DNPS) in 2017:

Revision 13 of the ODCM was issued in January 2017. The Revision 13 changes were releated to removing the requirement to enter Mode 2 due to non-funcitonal Condenser Air Ejector Radiation Monitors. The revision also included instituting programmatic sampling requirments of the off-gas systems to allow continued plant operation, while maintaining the ability to validate that the off-gas system efluents are within applicable limits, in the event of non-functioning Condenser Air Ejector Radiation Monitors. Finally, the revision included modifying the ODCM bases to reflect the changes in the requirements described above .

. The Dresden Station ODCM, Revision 13, is included as Attachment I of this document.

9. Enata:

None Page 4 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 J7 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear UNITS 1,2,3 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES 1

pi 2nd 3rt1 41h Est. Total Units Quarter Quarter Quarter Quarter Error,%

A F**1ss1on

. & actrvat10n gases

1. Total release Ci 1.12E+01 1.05E+OI 1.45E+Ol I .27E+O'J 1.31E+Ol J

2. Average release rate for period uCi/sec l.45E+OO I.34E+OO 1.82E+OO 1.60E+OO

3. Percent of ODCM annual dose limit Whole 2.29E-04 2.15E-04 2.17E-04 1.77E-04 Body

%Skin 6.49E-05 6.BE-05 6.18E-05 5.08E-05 B. Iodine-131 L TotaJ release Ci 2.41 E-04 3.05E-04 2.78E-04 2.12E-04 2.60E+OI I

2. A_yerage release rate for reriod uCilsec 3.lOE-05 3.88E-05 3.50E-05 2.66E-05

3. Percent of ODCM annual dose limit e') % 4.47E--03 5.46E-03 5.02:E-03 3.90E-03

C. Particulates

1. Particulates with half-lives > 8 days Ci 6.l lE-04 7.83E-04 l.03E-03 7.26E-04 2.94E+01 I

2. Average release rate for oeriod uCilsec 7.86E-05 9.96E-05 J.29E-04 9.14E-05

3. Percent of ODCM annual dose limit (*) % 4.47E-03 5.46E-03 5.02E-03 3.90E-03 D. Tritium I.

Total release Ci 3.08E+OO 2.50E+OO 2.17E+OO 4.54E+OO 7.56E+OO J

2. Average release rate for period uCilsec 3.97E-01 3.17E-01 2.73E-01 5.71E-01

3. Percent of ODCM annual dose limit (*) % 4.47E-03 5.46E-03 5.02E-03 3.90E-03 E. Gross Alpha I. Total release Ci <LLD <LLD <LLD <LLD 2.94E+OI I

2. Average release rate for oeriod uCilsec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM annual dose limit % NIA NIA NIA NIA F. Carbon-14

1. Total release Ci 7.38E+OO 7.46E+OO 7.54E+OO 6.64E+OO

2. Average release rate for eriod u.Ci/sec 9.49E-01 9.49E-OJ 9.49E-01 8.35E-OJ

(*): "Percent of ODCM annual dose Jim.it" indicates combined total of Iodine-131, Particulates, and Tritium

Page 5 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010150-237150-249 FaciJity: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear UNJT 1 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES 1,\I 2'"' 3"' 41h Est. Total Units Quarter Quarter Quarter Quarter Error,%

A. Fission & activation gases

1. Total release Ci <LLD <LLD <LLD <LLD 1.31E+01 I

2. Average release rate for period uCi/sec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM quarterly dose limit %-y NIA NIA NIA NIA 1

Yo~ NIA NIA NIA NIA B. Iodine-BJ

1. Total release Ci <LLD <LLD <LLD <LLD 2.60E+Ol

2. Average release rate for pe1iod llCilsec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM quarterly dose limit (*) % N/A NIA NIA NIA C. Particulates

l. Particulates with half-lives > 8 da s Ci l.93E-05 2.04E-05 2.07E-05 1.90E-05 2.94E+Ol

2. Avera e release rate for eriod llCi/sec 2.48E-06 2.60E-06 2.60E-06 2.40E-06

3. Percent of ODCM uarterl dose limit (*) % 6.26E-03 6.33E-03 6.35E-03 6.24E-03 D. Tritium L Total release Ci <LLD <LLD <LLD <LLD 7.56E+OO I

2. Average release rate for period LLCi/sec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM quarterly dose limit (*) % NIA NIA NIA NIA E. Gross Alpha

l. Total release Ci <LLD <LLD <LLD <LLD 2.94E+Ol I

2. Average release rate for period llCilsec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM quarterly dose limit % NIA NIA NIA NIA F. Carbon-14

1. Total release Ci 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO

2. Avera e release rate for eriod Ci/sec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

(*): "Percent of ODCM quarterly dose limit" indicates combined total ofiodine-131, Particulates, and TLitium Page 6 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT, RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear UNIT2 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES 1- 2"'1 '.1"d 41h Est. Tota]

Units Quarter Quarter Quarter Quarter Error,%

A F1ss1on

. & act1vat10n gases

1. Total release Ci 5.22E+OO 5.0JE+OO 6.05E+OO 3.73E+OO 1.31E+01 I

2. Average release rate for period µCi/sec 6.7IE-Ol 6.37E-01 7.6IE-01 4.70E-OI

3. Percent of ODCM quarterly dose limit %y 3.87E-03 3.79E-03 3.30E-03 l.96E-03

%~ 7.79E-05 1.26E--04 7.44E-05 6.79E-05 B. Iodine-131 I. Total release Ci 9.04E-05 1.27E-04 l.59E-04 8.17E-05 2.60E+OI I

2. Average release rate for period ttCi/sec l.16E-05 l.62E-05 2.00E-05 l.03E-05

3. Percent of ODCM quarterly dose limit (*) % l.47E-OJ l.49E-01 *1.53E-O:I 1.J6E-01 C.

Particulates

1. Particulates with half-lives > 8 days Ci 2.16E-04 3.15E-04 5.69E-04 2.92E-04 2.94E+01 I

2. Average release rate for period u.Ci/sec 2.78E-05 4.00E-05 7.16E-05 3.68E-05

3. Percent of ODCM quarterly dose limit(*) % l.47E-01 1.49E-01 l.53E-Ol Ll6E-01 D. Tritium

1. Total release Ci LBE+OO 1.04E+OO 1.13+00 1.66E+OO 7.56E+OO I

2. Average release rate for oe1iod u.Ci/sec 1.46E-01 1.32E-Ol 1.42E-01 2.09E-01

3. Percent of ODCM quarterly dose limit(*) % I.47E-OJ 1.49E-01 1.53E-OJ l.l6E-01 E. Gross Alpha I. Total release Ci <LLD <LLD <LLD <LLD 2.94E+Ol I

2. Average release rate for ()eriod u.Ci/sec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM quarter! y dose limit % NIA N/A N/A N/A F. Carbon-14 I. Total release Ci 3.69E+OO 3.73E+OO 3.77E+OO 2.87E+OO

2. Avera e release rate for eriod *u.Ci/sec 4. 7 5E-O 1 4.74E-01 4.74E-Ol 3.61E-01

(*): "Percent of ODCM quarterly dose limit" indicates combined total of Iodine-131, Particulates, and Tritium

Page 7 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE BFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear UNIT3 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES P' 2nd 3rt1 41h Est, Total Units Quarter Quarter Quarter Quarter En-or,%

A f"*1ss10n

. & act1vat1on gases

1. Total release Ci 6.03E+OO 5.53E+OO 8.41E+OO 8.98E+OO 1.3rn+01 I

2. Average release rate for period µCi/sec 7.76E-01 7.03E-Ol 1.06E+OO 1 .BE+OO

3. Percent of ODCM quarterly dose limit %y 4.61E-03 4.25E-03 4.94E-03 4.78E-03

%~ 8.77E-05 l.31E-04 J.04E-04 l.64E-04 B. Iodine-131

l. Total release Ci l.51E-04 1.78E-04 l.20E-04 l.30E-04 2.60E+Ol I

2. Average release rate for period uCi/sec l.94E-05 2.26E-05 ISlE-05 1.64E-05

3. Percent of ODCM quarterly dose limit(*) % :I.49E-OJ I SIE-01 l.52E-01 I.53E-01 C. Particulates

1. Particulates with half-lives > 8 da s Ci 3.76E-04 4.48E-04 4.39E-04 4. ISE-04 2.94E+OI

2. u.Ci/sec 4.83E-05 5.70E-05 5.53E-05 5.22E-05

3. % 1.49E-Ol 1.51 E-01 1.52E-OI 1.53E-01 D. Tritium

1. Total release Ci l.95E+OO l.45E+OO l.05E+OO 2.87E+OO 7.56E+OO I

2. Average release rate for period u.Ci/sec 2.51E-Ol 1.85E-Ol 1.32E-01 3.62E-01

3. Percent of ODCM auarterlv dose limit(*) % J.49E-01 1.51E-Ol I .52E-Ol l.53E-01 E. Gross Alpha

1. Total release Ci <LLD <LLD <LLD <LLD 2.94E+OI I

2. Average release rate for period u.Ci/sec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of ODCM quarterly dose limit % NIA N/A NIA NIA F. Carbon-14

1. Total release Ci 3.69E+OO 3.73E+OO 3.77E+OO 3.77E+OO

2. Avera e release rate for eriod Ci/sec 4.15E-Ol 4.74E-01 4.74E-01 4.74E-01

(*): "Percent of ODCM quarterly dose limit" indicates combined total oflodine-131, Particulates, and Tritium Page 8 ofl39

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear TABLE OF LOWER LIMITS OF DETECTABILITY FOR GASEOUS EFFLUENTS L FISSION I ACTIV ATlON GASES µCi/cc Kr-87 I.OOE-04 Kr-88 1.00E-04 Xe-133 I .OOE-04 Xe-133m l.OOE-04 Xe-135 :I .OOE-04 Xe-138 I .OOE-04

2. IODINES µCi/cc I-I 31 1.00E-12

]-B3 J.OOE-:10

3. PARTICULATES µCi/cc Sr-89 J .OOE-11 Sr-90 LOOE-11 Mn-54 1.00E-11 Co-58 1.00E-11 Fe-59 I .OOE-I 1 Co-60 I .OOE-11 Zn-65 I.OOE-11 Mo-99 I.OOE-11 Cs-134 1.00E-11 Cs-137 1.00E-11 Ce-141 l.OOE-11 Ce-144 1.00E-11

4. OTHER µCi/cc H-3 l.OOE-06 Gross Alpha 1.00E-11 The above values are the ODCM-required LLDs .

Page 9 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-0l0/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNJTS 1,2,3 GROUND (*) GROUND RELEASES CON'I1Nll0US MODE Nuclides Released Unit 1 1' Quarter 2 11

<1 Quarter 3nl Quarter 4th Quarter ANNUAL

1. Fission and Actjvation Gases Ar-41 Ci <LLD <LLD <LLD 2.8JE-07 2.81E-07 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85rn Ci <LLD <LLD <LLD 2.98E-07 2.98E-07 Kr-87 Ci <LLD <LLD <LLD 1.72E-06 l.72E-06 Kr-88 Ci <LLD <LLD <LLD LJ1E-06 I.I IE-06 Xe-131m Ci *<LLD <LLD <LLD J.61E-08 I .6lE-08 Xe-133 Ci <LLD <LLD <LLD I.07E-07 I.07E-07 Xe-l33m Ci <LLD <LLD <LLD 5.7:IE-11 5.71 E-l l Xe-135 Ci <LLD <LLD <LLD l.72E-06 l.72E-06 Xe-135m Ci <LLD <LLD <LLD 3.53E-06 3.53E-06 Xe-138 Ci <LLD <LLD <LLD l.30E-05 J.30E-05 Total for period Ci <LLD <LLD <LLD 2.J SE-05 2.JSE-05

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD 8.14E-09 8.14E-09 Br-84 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci <LLD <LLD <LLD l.07E-I0 1.07E-I0 I-132 Ci <LLD <LLD <LLD 6.45E-10 6.45E-10 l-133 Ci <LLD <LLD <LLD 7.lOE-10 7.IOE-10 I-134 Ci <LLD <LLD <LLD 5.17E-07 5.17E-07 I-135 Ci <LLD <LLD <LLD l.06E-09 1.06E-09 Total for period Ci <LLD <LLD <LLD 5.28E-07 5.28E-07

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD 1.6IE-07 1.6IE-07 Mn-54 Ci <LLD <LLD <LLD 2.46E-07 2.46E-07 Co-57 Ci <LLD <LLD <LLD 3.SOE-10 3.80E-I0 Co-58 Ci <LLD <LLD <LLD 9.96E-08 9.96E-08 Fe-59 Ci <LLD <LLD <LLD 6.22E-08 6.22E-08 Co-60 Ci <LLD <LLD <LLD 2.SlE-06 2.81E-06 Zn-65 Ci <LLD <LLD <LLD 1.32E-07 l.32E-07 Nb-95 Ci <LLD <LLD <LLD 8.90E-09 8.90E-09 Zr-95 Ci <LLD <LLD <LLD 7.16E-09 7.16E-09 Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-llOm Ci <LLD <LLD <LLD 2.7IE-08 2.7IE-08 Sn-JB Ci <LLD <LLD <LLD l.99E-09 1.99E-09 Sn-117111 Ci <LLD <LLD <LLD 1.18E-08 1.18E-08 Te-123111 Ci <LLD <LLD <LLD 1.22E-08 l.22E-08 Sb-124 Ci <LLD <LLD <LLD 1.40E-08 1.40E-08 Sb-125 Ci <LLD <LLD <LLD 2.32E-09 2.32E-09 Page 10 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci l.80E-05 I.80E-05 1.80E-05 2.08E-05 7.48E-05 Ba-140 Ci <LLD <LLD <LLD 4.53E-09 4.53E-09 Ce-14.1 Ci <LLD <LLD <LLD 1 .06E-11 J .06E-I J Ce-l 44 Ci <LLD <LLD <LLD 6.66E-IO 6.66E-'IO Hf-181 C'.I <LLD <LLD <LLD 7.34E-11 7.34E-*11 Total for period Ci 1.80E-05 1.80E-05 l.80E-05 2.44E-05 7.84E-05

4. Tritium Total for period Ci <LLD <LLD <LLD 1.8IE-05 .I .81E-05

5. Gross Alpha Total for period Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for period Ci <LLD <LLD <LLD <LLD <LLD

(*): The values in this table represent Unit ]Main Turbine Floor and Unit 1 Fuel Building, Chemistry Laboratory Ventilation Effluent, East Turbine Building Ventilation System, Units 2/3 Heating Steam System unmonitored effluents .

Page 11 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

OOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNJTS 1,2.3 GROUND(*) GROUND RELEASES BATCH MODE Nuclides Released Unit I" Quarter 2nt1 Quarter 3'11 Quarter 1 4 h Quarter ANNUAL

1. Fission and Aclivation Gases Ar-41 Ci Kr-85 Ci Kr-85m

Ci Kr-87 Ci Kr-88 Ci Xe-13] m Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-I35m Ci Xe-138 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci I-131 Ci I-132 Ci I-133 Ci I-134 Ci I-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-110m Ci Sn-113 Ci Sn-117m Ci Te-123m Sb-124 Sb-125 Ci Ci Ci Page 12 of 139 I

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237 /50-249 Facility: Dresden Nuclear Power Station Units I ,2,3 Licensee: Exelon Nuclear Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 Ci Total for period Ci None(*) None{*) None(*) None(*) None(,.')

4. Ttitium Total for period Ci None(*) None('-') None(*) None('-') None(*)

5. Gross Alpha Total for period ('"

,I None(*) None('-') None(*) None('-') None ('-') *

6. Carbon-14 Total for period Ci None(*) None('-') None(*) None(*) None(*)

(*): No batch releases via this emuent path during this time period .

Page 13 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS uNIT 1 GROUND (*) GROUND RELEASES CONTINUOUS MODE Nuclides Released Unit 1-' Quarter 1

2nu Qmtrter 3n1 Qumter 4,h Quarter ANNUAL

I. Fission and Activntion Gases Ar-41 Ci NIA NIA NIA NIA NIA Kr-85 Ci NIA NIA NIA NIA NIA Kr-85m Ci NIA NIA NIA NIA NIA Kr-87 Ci NIA NIA NIA NIA NIA Kr-88 Ci NIA NIA NIA NIA NIA Xe-J 31m Ci NIA NIA NIA NIA NIA Xe-133 Ci NIA NIA NIA NIA NIA Xe-133m Ci NIA NIA NIA NIA NIA Xe-135 Ci NIA NIA NIA NIA NIA Xe-135m Ci NIA NIA NIA NIA NIA Xe-138 Ci NIA NIA NIA NIA NIA Total for period Ci None None None None None

2. Iodines and Halogens Br-82 C"l NIA NIA NIA NIA NIA Br-84 Ci NIA NIA NIA NIA NIA I-131 Ci NIA NIA NIA NIA NIA I-132 Ci NIA NIA NIA NIA NIA I-133 Ci NIA NIA NIA NIA NIA I-134 Ci NIA NIA NIA NIA NIA I-135 Ci NIA NIA NIA NIA NIA Total for period Ci None None None None None

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-llOm Ci <LLD <LLD <LLD <LLD <LLD Sn-113 Ci <LLD <LLD <LLD <LLD <LLD Sn-I '17m Ci <LLD <LLD <LLD <LLD <LLD Te-123m Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Page 14 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci 1.SOE-05 1.SOE-05 1.SOE-05 1.SOE-05 7.20E-05 Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <.LLD <LLD <LLD <LLD Hf-181 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci I.SOE-05 I.SOE-05 I.80E-05 l .SOE-05 7.20E-05

4. Tritium Total for period Ci None None None None None

5. Gross Alpha Total for period Ci None None None None None

6. Carbon-14 Total for petiocl Ci None None None None None

(*): The values in this table repre~~ent llnit !Main Turbine Floor and Unit I Fuel Building unmonitored effluent.

Page 15 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS uNIT J GROllND (*) GROUND RELEASES BATCH MODE Nuclides Released Uni! I"' Quarter 2m1 Quarter 3rd Quarter 1 4 Quarter

" ANNUAL I. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-l31m Ci Xe-133 Ci Xe-I33m Ci Xe-135 Ci Xe-I35m Ci Xe-138 Ci Total for oeriocl Ci None(*) None(*) None(*) None(*) Nonen

2. Iodines and Halogens Br-82 Ci Br-84 Ci I-131 Ci I-132 Ci 1-133 Ci I-134 Ci I-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci A,g-110111 Ci Sn-113 Ci Sn-117m Ci Te-123m Sb-124 Sb-125 Ci Ci Ci Page 16 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 C1 Hf-I 81 Ci Total for pe1iod Ci None(~') None(*) None(*) None(*) None(*)

4. Tlitium Total for pe1iod Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None C') None(*)

6. Carbon-14 Total for period Ci None(*) None(*) None(*) None(*) None (*)

(*): No batch releases via this effluent path

- Page 17 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station UnHs 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS uNIT 2 GROUND(*) GROUND RELEASES CONTINUOUS MOD E 111 Nuclides Released Unit l ,i Quarter 2nt1 Quarter 3nt Quarter 4 Quarter ANNUAL

1. Fission and Activation Gases Ar-41 Ci <LLD <LLD <LLD l.03E-07 1.03E-07 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD 1.56E-07 1.56E-07

.Kr-87 Ci <LLD <LLD <LLD 9.02E-07 9.02E-07 Kr-88 Ci <LLD <LLD <LLD 6.0lE-07 6.0IE-07 Xe-13:lm Ci <LLD <LLD <LLD 9.SSE-09 9.SSE--09 Xe-133 Ci <LLD <LLD <LLD 4.88E-08 4.88E-08 Xe-133m Ci <LLD <LLD <LLD 2.86E-l l 2.86E-ll Xe-135 Ci <LLD <LLD <LLD 8.12E-07 8.l2E-07 Xe-135111 Ci <LLD <LLD <LLD 1.58E-06 l.58E-06 Xe-138 C'l <LLD <LLD <LLD 6.02E-06 6.02E-06 Total for period Ci <LLD <LLD <LLD :l.02E-05 l .02E-05

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD 7.16E-09 7.16E-09 Br-84 Ci <LLD <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD 4.42E-l l 4.42E-l l I-132 Ci <LLD <LLD <LLD 3.83E-10 3.83E-10 I-133 Ci <LLD <LLD <LLD 3.43E-10 3.43E-10 I-134 Ci <LLD <LLD <LLD l.40E-07 1.40E-07 1-135 Ci <LLD <LLD <LLD 5.34E-I0 5.34E-10 Total for period Ci <LLD <LLD <LLD 1.48E-07 l .48E-07

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD 7.82E-08 7.82E-08 Mn-54 Ci <LLD <LLD <LLD l.ISE-07 1.lSE-07 Co-57 Ci <LLD <LLD <LLD l.7IE-10 l.7IE-10 Co-58 Ci <LLD <LLD <LLD 4.38E-08 4.38E-08 Fe-59 Ci <LLD <LLD <LLD 3.76E-08 3.76E-08 Co-60 Ci <LLD <LLD <LLD 2.48E-06 2.48E-06 Zn-65 Ci <LLD <LLD <LLD 6.13E-08 6.13E-08 Nb-95 Ci <LLD <LLD <LLD 3.20E-09 3.20E-09 Zr-95 Ci <LLD <LLD <LLD 3.12E-09 3.12E-09 Mo-99 Ci <LLD <LLD <LLD <LLD <LLD A,g-110111 Ci <LLD <LLD <LLD 2.02E-08 2.02E-08 Sn-113 Ci <LLD <LLD <LLD 7.46E-10 7.46E-IO Sn-117m Ci <LLD <LLD <LLD 6.67E-09 6.67E-09 Te-123m Sb-124 Sb-125 Ci Ci Ci

<LLD

<LLD Page 18 of 139

<LLD

<LLD 6.88E-09 7.30E-09 9.17E-10 6.88E-09 7.30E-09 9.17E-10

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-23 7/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD 2.78E-06 2.78E-06 Ba-140 Ci <LLD <LLD <LLD 2.00E-09 2.00E-09 Ce-.141 Cj <LLD <LLD <LLD <LLD <LLD Ce-144 C'.I <LLD <LLD <LLD 6.35E-]0 6.35E-10 Hf-J 81 Ci <LLD <LLD <LLD 7.34E-1 I 7.34E-J I Total for oe1iod Ci <LLD <LLD <LLD 5.64E-06 5.64E-06

4. Tritium Total for pe1iod Ci None None None None None

5. Gross Alpha Total for period C1 None None None None None

6. Carbon-14 Total for period Ci None None None None None

(*): The values in this table represent Chemistry Laboratory Venti.lation Effluent and East Turbine Building Ventilation System unmonitored effluents .

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DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNJT 2 GROUND ( *) GROUND RELEASES BATCH MODE 2nd Quarter 1 1 Nuclides Released Unit P' Quarter 3" Quarter 4 Quarter

" ANNUAL

l. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci

Kr-87 Ci Kr-88 Ci Xe-131m Ci Xe-133 Ci Xe-133m Ci Xe-:135 Ci Xe-135m Ci Xe-138 Ci Total for l)eriod C",I None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci I-131 Ci I-132 Ci I-133 Ci 1-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-110m Ci Sn-113 Ci Sn-117111 Ci Te-123m Ci Sb-124 Ci Sb-125 Ci Page 20 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Fadlity: Dresden Nuclear Power Station Units 1,2,3 Licensee: ExeJon Nuclear Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-J 81 Ci Total for period Ci None(*) None(*) None(*) Nmie ('~) None(*)

4. Tritium Total for period Ci None(*) None(*) None(*) N6ne (*) None(*)

5. Gross Alpha Total for peiiod Ci None(*) None(~') None('-') None(*) None(*)

6. Carbon-14 Total for period Ci None(*) None(*) None(*) None(*) None(*)

C:.): No batch releases via this effluent path during this time period .

Page 21 of 139

DRESDEN NUCLEAR POWER ST ATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNIT3 GROUND(*) GROUND RELEASES CONTINUOllS MODE Nuclides Released Unit 1 1-' Quarter 2 11

" Quarter 3rd Quarter 4111 Quarter ANNUAL

l. Fission and Activation Gases Ar-41 Ci <LLD <LLD <LLD 1.78E-07 1.78E-07 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD J .42E-07 l.42E-07 Kr-87 Ci <LLD <LLD <LLD 8.15E-07 8.ISE-07 Kr-88 Ci <LLD <LLD <LLD 5.BE-07 5.13E-07 Xe-13lm Ci <LLD <LLD <LLD 6.58E-09 6.58E-09 Xe-133 Ci <LLD <LLD <LLD 5.78E-08 5.78E-08 Xe-133m Ci <LLD <LLD <LLD 2.85E-l l 2.85E-1J Xe-135 Ci <LLD <LLD <LLD 9.04E-07 9.04E-07 Xe-135m Ci <LLD <LLD <LLD 1.95E-06 l.95E-06 Xe-138 Ci <LLD <LLD <LLD 6.96E-06 6.96E-06 Tota1 *for period Ci <LLD <LLD <LLD 1.15E-05 1 J SE-05

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD 9.81E-I0 9.81E-I0 Br-84 Ci <LLD <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD 6.23E-l 1 6.23E-1 l 1-132 Ci <LLD <LLD <LLD 2.62E-10 2.62E-I0 I-133 Ci <LLD <LLD <LLD 3.67E-10 3.67E-I0 I-!34 Ci <LLD <LLD <LLD 3.77E-07 3.77E-07 I-135 Ci <LLD <LLD <LLD 5.22E-10 5.22E-I0 Total for period Ci <LLD <LLD <LLD 3.79E-07 3.79E-07

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD 8.26E-08 8.26E-08 Mn-54 Ci <LLD <LLD <LLD 1.3 lE-07 l.31E-07 Co-57 Ci <LLD <LLD <LLD 2.09E-I0 2.09E-I0 Co-58 Ci <LLD <LLD <LLD 5.58E-08 5.58E-08 Fe-59 Ci <LLD <LLD <LLD 2.46E-08 2.46E-08 Co-60 Ci <LLD <LLD <LLD 3.30E-07 3.30E-07 Zn-65 Ci <LLD* <LLD <LLD 7.07E-08 7.07E-08 Nb-95 Ci <LLD <LLD <LLD 5.70E-09 5.70E-09 Zr-95 Ci <LLD <LLD <LLD 4.04E-09 4.04E-09 Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-llOm Ci <LLD <LLD <LLD 6.95E-09 6.95E-09 Sn-113 Ci <LLD <LLD <LLD l.24E-09 l.24E-09 Sn-117111 Ci <LLD <LLD <LLD 5.12E-09 5.12E-09 Te-123m Ci <LLD <LLD <LLD 5.27E-09 5.27E-09 Sb-124 Ci <LLD <LLD <LLD 6.74E-09 6.74E-09 Sb-125 Ci <LLD <LLD <LLD 1.40E-09 1.40E-09 Page 22 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD 2.53E-09 2.53E-09 Ce-141 Ci <LLD <LLD <LLD J .06E-1 I L06E-I 1 Ce-144 Ci <LLD <LLD <LLD 3.TIE-11 3.1 IE-1 I Hf-J 81 Ci <LLD <LLD <LLD <LLD <'LLD Total for period Ci <LLD <LLD <LLD 7.34E-07 7.34E-07

4. T,itium Total for petiod Ci <LLD <LLD <LLD l.8JE-05 l.8lE-05

5. Gross Alpha Total for J)eriod Ci None None None None None

6. Carbon-14 Total for period Ci None None None None None

(*): The values in this table represent Chemistry Laboratory Ventilation Effluent and Units 2/3 Heating Steam unmonitored effluents .

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DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 GASEOUS EFFLUENTS Licensee: Exelon Nuclear UNIT 3 GROUND (*) GROUND RELEASES BATCH MODE Nuclides Released Unit 1.s1 Quarter 2'" 1 Quarter 3"1 Quarter 4 1" Quarter ANNUAL

.1. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-l31m Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-l35m Ci Xe-138 Ci Total for period c*,1 None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci I-131 Ci I-132 Ci I-133 Ci 1-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-llOm Ci Sn-113 Ci Sn-tl7m Ci Te-123m Ci Sb-124 Ci Sb-125 Ci Page 24 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 c*.I Total for period Ci None(*) None(*) None(*) None(*) None(*)

4. T1itimn Total for period Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Alplia Total for J)eriod Ci None(*) None(*) None(~') None(*) None(*)

6. Carbon-14 Total for peliod Ci None(*) None(*) Nolle(*) None(*) None(*)

(*): No batch re.leases via this effluent path during this time period .

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DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNITS L2,3 MAlN CHJMNEIYS ELEVATED RELEASES CONTINUOUS MODE 1 1111 111 4,JJ Quarter NucHdes Released Unit l' Qt1arter 2 Quarter 3 Quarter ANNUAL

1. Fission and Activation Gases Ar-41 Ci 5.04E-OI 3.74E-OJ 4.93E-Ol 2.59E-OJ 1.63E+OO Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci 6.91E-02 6.07E-02 7.06E-02 6.29E-02 2.63E-01 Kr-87 C1 2.30E-01 2.15E-01 2J2E-01 I.TIE-OJ 8.28E-Ol Kr-88 Ci J .33E-OJ l.27E-OI l.21E-OI l.OlE-OJ 4.82E-01 Xe-131m ("

,l <LLD <LLD <LLD <LLD <LLD Xe-133 Ci 3:33E+OO 2.28E+OO 6J9E+OO 5.66E+OO l.75E+OI Xe-l33m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci l.91E-Ol l.8IE-01 I.] 9E+OO 5.69E-01 2.13E+OO Xe-135m ("

,1 1.3lE+OO l.29E+OO l.23E+OO l.03E+OO 4.86E+OO Xe-138 Ci 5.48E+OO 5.28E+OO 4.96E+OO 4.24E+OO 2.00E+Ol Total for oe1fod Ci 1.12E+01 9.8lE+OO 1.45E+Ol *1.2rn+o1 4.76E+OI

2. Iodines and Halogens

<LLD <LLD <LLD <LLD <LLD Br-82 Ci Br-84 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci 2.41E-04 3.05E-04 2.78E-04 2.12E-04 l.04E-03 I-132 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci l.41E-03 2.l7E-03 2.l7E-03 1.5IE-03 7.27E-03 I-134 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci 8.67E-04 l.64E-03 1.96E-03 2.29E-04 4.69E-03 Total for period \ Ci 2.52E-03 4.12E-03 4.4IE-03 l.95E-03 1.30E-02

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci 3.96E-05 3.02E-05 3.27E-05 4.39E-05 1.46E-04 Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci 3.54E-05 7.19E-05 7.52E-05 3.58E-05 2.18E-04 Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci l.42E-05 4.72E-05 6.SOE-05 2.41E-05 l.SOE-04 Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 2.18E-04 2.45E-04 3.14E-04 2.48E-04 l.03E-03 Zn-65 Ci 1.53E-04 2.63E-04 3.80E-04 1.12E-04 9.08E-04 Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-1 lOm Ci 5.83E-06 3.25E-06 <LLD <LLD 9.08E-06 Sn-113 Ci <LLD <LLD <LLD <LLD <LLD Sn-l 17m Ci 3.16E-05 3.24E-05 5.91E-05 4.55E-05 1.69E-04 Te-123m Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Page 26 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Cs-134 Ci <LLD <LLD <LLD Licensee: Exelon Nuclear

<LLD <LLD Cs-137 Ci 2.98E-06 <LLD <LLD <LLD 2.98E-06 Ba-140 Ci 6.63E-05 4.97E-05 6.44E-05 7.46E-05 2.55E-04 Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Hf-18'1 Ci <LLD <LLD <LLD <LLD <LLD Total for l)eriod Ci 5.67E-04 7.42E-04 9.90E-04 5.84E-04 2.88E-03

4. Tritium Total for period Cj 2.52E+OO 2.02E+OO L73E+OO 3.98E+OO *1.02E+OI

5. Gross Aloha Total for pe1iod Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for perjod Ci 7.38E+OO 7.46E+OO 7.54-E+OO 6.64E+OO 2.90E+OI

Page 27 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 J7 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 GASEOUS EFFLUENTS Licensee: Exelon Nuclear UNITS 1,2,3 MAJN CHIMNEYS (*) ELEVATED RELEASES BATCH MODE Nuclides Released Unit JS' Quarter 2nd Quarter 3rd Quarter 4 111 Quarter ANNUAL

1. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-131111 Ci Xe--133 Ci Xe-133111 Ci Xe-135 Ci Xe-135m Ci Xe-:138 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. lodines and Halogens Br-82 Ci Br-84 Ci I-Bl Ci I-132 Ci 1-133 Ci I-134 Ci 1-135 Ci Total for pe1iod Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci A,g-llOm Ci Sn-113 Ci Sn-117m Ci Te-123m Ci Sb-124 Ci Sb-125 Ci Page 28 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 J7 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Cs-134 Ci Licensee: Exelon Nuclear Cs-137 Ci Ba-140 Cj Cc-141 Ci Ce-144 Ci Hf-18] Ci Total for period Ci None(*) None(*) None (*) None(*) None(*)

4. Trjtium Total for period Ci None(*) None(*) None(*) None(>.') None("')

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-] 4 Total for period Ci None e') None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path

Page 29 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 GASEOUS EFFLUENTS Licensee: Exelon Nuclear uNIT 1 MAIN CHIMNEY(* ELEV ATED RELEASES CONTINUOUS MODE Nuclides Released llnit ]M Quarter 2n,i Quarter 3,*t1 Quaiter 4th Quarter ANNUAL Nuclides Released

l. 'Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-131m Ci Xe-133 Ci Xe-:133m Ci Xe-135 Ci Xe-135m Ci Xe-l38 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci 1-131 Ci I-:132 Ci I-133 Ci 1-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. Particulates Fe-55 Ci Sr-89 Ci Sr-90 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Co-57 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-110m Ci Sn-113 Ci Sn-117111 Ci Te-123m Ci Page 30 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACT,NE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Sb-124 Ci Licensee: Exelon Nuclear Sb-125 Ci Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 c*.I Total for pe1iod Ci None(*) None(*) None(*) None(*) None(*)

4. Tritium Total for period Ci None(*) None(*) None(*) None("') None(*)

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-14 Total for period Ci None(*) None(') None(*) None(<) None(*)

(*): No continuous releases via this effluent path

Page 31 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 GASEOUS EFFLUENTS Licensee: Exelon Nuclear uNlT 1 MAIN CHlMNEY (* ELEV A11~D RELEASES BATCH MODE Nuclides Released Unit 161 Quarter . 2m1 Quarter 31(1 Qumter 4 111 Quarter ANNUAL Nuclides Released I. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr;88 Ci Xe-l31m Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-135m Ci Xe-138 Ci Total for period

2. Iodines and Halogens Br-82 Br-84 I-131 l-132 Ci Ci Ci Ci Ci None(*) None(*) None("') None(~') None(*)

1-133 Ci I-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-llOm Ci Sn-113 Ci Sn-117m Ci Page 32 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Te-123m Ci Sb-124 Ci Sb-125 Cl Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

4. Tritium Total for period Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Alpha Total for pe1iocl Ci None (*) None(*) None(*) None(*) None(~')

6. Carbon-14 Total for period Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path

Page 33 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-0) 0/50-23 7/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNIT 2 MAIN CHJMNEY ELEVATED RELEASES CONTINUOUS MODE Nuclides Released Unit 1 J-' Quarter 2"d Quarter 3rd Quarter 4th Qumier ANNUAL

l. Fission and Activation Gases Ar-41 Ci 3.58E-02 8.09E-02 4.72E-02 7.62E-02 2.40E-01 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci 2.16E-02 I .98E-02 2.ISE-02 I .69E-02 7.99E-02 Kr-87 Ci l.20E-01 l.16E-OJ I.OSE-01 5.90E-02 4.00E-01 Kr-88 Ci 7.49E-02 7.12E-02 5.97E-02 3.83E-02 2.44E-OJ Xe-l3lm Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci 1.57E+OO I .08E+OO 2.67E+OO l.68E+OO 6.99E+OO Xe-133m Ci <LLD <LLD <LLD <:LLD <LLD Xe-135 Cj 9.81E-02 9.47E-02 5.48E-Ol 1.75E-0.1 9.J6E-01 Xe-135m Ci 6.l5E-OI 6.06E-01 5.03E-01 2.98E-01 2.02E+OO Xe-138 Ci 2.68E+OO 2.57E+OO 2.JOE+OO l.2lE+OO 8.56E+OO Total for period Ci 5.22E+OO 4.64E+OO 6.05E+OO 3.55E+OO l.95E+Ol

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD <LLD <LLD Br-84 Ci <LLD <LLD <LLD <LLD <LLD I-13 l Ci 9.04E-05 l.27E-04 J.59E-04 8.16E-05 4.58E-04 l-132 Ci <LLD <LLD <LLD <LLD <LLD I-133 Ci 5.26E-04 9.08E-04 l.24E-03 5.59E-04 3.23E-03 J-134 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci 3.27E-04 6.88E-04 l.12E-03 l.05E-04 2.24E-03 Total for period Ci 9.43E-04 1.72E-03 2.51E-03 7.46E-04 5.93E-03

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci l.47E-05 I.26E-05 I .86E-05 l.57E-05 6.16E-05 Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci l.26E-05 3.00E-05 4.29E-05 1.46E-05 l.OOE-04 Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci 5.02E-06 l.96E-05 3.70E-05 9.42E-06 7.IOE-05 Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 8.00E-05 l.02E-04 J;79E-04 9.42E-05 4.55E-04 Zn-65 Ci 5.46E-05 1.lOE-04 2.I6E-04 4.58E-05 4.26E-04 Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-1 lOm Ci 2.04E-06 1.31E-06 <LLD <LLD 3.35E-06 Sn-113 Ci <LLD <LLD <LLD <LLD <LLD Sn-117m Ci l.2IE-05 1.35E-05 3.37E-05 l.47E-05 7.41E-05 Te-123m Ci <LLD <LLD <LLD <LLD <LLD Page 34 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Sb-124 Ci <LLD <LLD <LLD Licensee: Exelon Nuclear

<LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Cs-J34 Cj <LLD <LLD <LLD <LLD <LLD Cs-137 Ci J .13E-06 <LLD <LLD <LLD l.13E-06 Ba-140 Ci 2.34E-05 2.'12E-05 3.40E-05 2.46E-05 I .03E-04 Ce-141 Cj <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Hf-181 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci 2.06E-04 3.J OE-04 5.62E-04 2.J9E-04 J .30E-03

4. Tritium Total for period Ci 9.24E-OJ 8.42E-OJ 9.87E-OI l.46E+OO 4.21.E+OO

5. Gross Alpha Total for period Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for period Ci 3.69E+OO 3.73.E+OO 3.77E+OO 2.87E+OO l.4lE+0I

Page 35 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFRUENTS uNlT 2 MAIN CHIMNEY (*) ELEVATED RELEASES BATCH MODE 1st Quarter 1 1 4th Quarter Nuclides Released Unit 2'" Quarter 3" Quarter ANNUAL I. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-131 m Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-135m Ci Xe-138 C'l Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Br-84 I-131

.I-132 1-133 Ci Ci Ci Ci Ci 1-134 Ci I-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-llOm Ci Sn-113 Ci Sn-117rn Ci Te-123111 Ci Page 36 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units J ,2,3 Sb-124 Ci Licensee: Exelon Nuclear Sb-125 Ci Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

4. Tritfom Total for period Ci None(*) None(*) None{*) None(*) None(*)

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-14 Total for pe1iod Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path

Page 37 of I 39

DRESDEN NUCLEAR POWER STATlON 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET Nrn.mERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNlT 3 MAIN CHlMNEY ELEVATED RELEASES CONTINUOUS MODE 1 1 Nuclides Released Unit 1-" Quarter 2"' Quarter 3" Quarter 4 1h Quarter ANNllAL

1. Fission and Activation Gases Ar-41 Ci 4.68E-01 2.93E-01 4.46E-01 l.83E-01 1.39E+OO Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci 4.75E-02 4.09E-02 4.91E-02 4.60E-02 1.84E-01 Kr-87 Ci l.09E-01 9.92E-02 l .07E-01 1J2E-Ol 4.27E-Ol Kr-88 Ci 5.80E-02 5.59E-02 6.14E-02 6.27E-02 2.38E-01 Xe-131m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci l.76E+OO 1.20E+OO 3.52E+OO 3.98E+OO 1.05E+Ol Xe-B3m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci 9.27E-02 8.67E-02 6.41E-0I 3.94E-01 1.2lE+OO Xe-135m c*l 6.98E-01 6.81E-0.1 7.27E-OI 7.37E-OI 2.84E+OO Xe-138 Ci 2.79E+OO 2.1lE+OO 2.86E+OO 3.03E+OO Ll4E+01 Total for period Ci 6.03E+OO 5.I7E+OO 8.41E+OO 8.54E+OO 2.82E+Ol

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD <LLD <LLD Br-84 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci l.SlE-04 1.78E-04 1.20E-04 1.30E-04 5.78E-04 I-132 Ci <LLD <LLD <LLD <LLD <LLD I-133 Ci 8.85E-04 1.27E-03 9.33E-04 9.SlE-04 4.04E-03 1-134 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci 5.40E-04 9.50E-04 8.4lE-04 1.24E-04 2.46E-03 Total for period Ci l.58E-03 2.39E-03 1.89E-03 1.20E-03 7.07E-03

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci 2.49E-05 l.77E-05 1.41E-05 2.82E-05 8.48E-05 Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci 2.28E-05 4.19E-05 3.23E-05 2.12E-05 1.18E-04 Co-58 Ci 9.19E-06 2.77E-05 2.80E-05 l.47E-05 7.95E-05 Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 1.38E-04 1.43E-04 l.35E-04 1.53E-04 5.70E-04 Zn-65 Ci 9.81E-05 1.53E-04 1.63E-04 6.67E-05 4.81E-04 Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-llOm Ci 3.79E-06 1.94E-06 <LLD <LLD 5.73E-06 Sn-113 Ci <LLD <LLD <LLD <LLD <LLD Sn-117m Ci l.95E-05 1.89E-05 2.54E-05 3.08E-05 9.46E-05 Te-123m Ci <LLD <LLD <LLD <LLD <LLD Page 38 of 139

DRESDEN NUCLEAR POWER STATION 20 l7 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Sb-124 Ci <LLD <LLD <LLD Licensee: Exelon Nuclear

<LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci 1.85E-06 <LLD <LLD <LLD I .85E-06 Ba-140 Ci 4.29E-05 2.85E-05 3.04E-05 5.00E-05 J.52E-04 Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Hf-181 Ci <LLD <LLD <LLD <LLD <LLD Total for J)eriod Ci 3.61E-04 4.33E-04 4.29E-04 3.65E-04 I .59E-03

4. Tritium Total for period Ci I .59E+OO 1.18E+OO 7.46E-OJ 2.52E+OO 6.04.E+oO

5. Gross Alplm Total for period Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for period Ci 3.69E+OO 3.73E+OO 3.77E+OO 3.77E+OO I .50E+OJ

Page 39 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS l 1NIT3 MAIN CHIMNEY(*) ELEVATED RELEASES BATCH MODE Nuclicles Released llnit 1" Quarter 2 d Quarter 11 3rd Quarter 1 4 Quarter

" ANNUAL

1. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-131m Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-135m Ci Xe-138 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci I-Bl Ci 1-132 Ci I-133 Ci l-134 Ci I-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. Particulates Fe-55 Ci Sr-89 Ci Sr-90 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-57 Ci Co-60 Ci Zn-65 Ci Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-II Om Ci Sn-113 Ci Sn-I 17m Ci Te-123m Ci Page 40 of 139

DRESDEN NUCLEAR POWER ST ATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017

- EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMI3ERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Sb-124 Ci Sb-125 Ci Cs-.134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-l 81 Ci Total for period Ci None(*) None(~') None(*) None(*) None("')

4. Tritium Total for period Ci None(*) None(*) None(*) None r') None(~')

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-I 4 Total for period Ci None('~) None(*) None(*) None(*) None e)

(*): No batch releases via this effluent path t .

Page 41 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMI3ERS: 50-010/50-237/50-249 Cl Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNITS 12,3 (*) MIXED MODE RELEASES CONTINUOUS MODE Nuclides Relensed Unit *1.i Quarter 2110 Quarter 3"1 Quarter 4111 Quarter ANNUAL Nuclides Released I. Fission and Activation Gases Ar-41 Ci <LLD <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-13]m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD 7.32E-01 <LLD 6.llE-01 1.34E+OO Xe-J33m Ci <LLD <LLD <LLD <LLD <LLD Xe-:135 C'.l 3.97E-06 <LLD 'l.2lE-05 5.93E-06 2.20E-05 Xe-135m Ci <LLD <LLD <LLD <LLD <LLD G Xe-138 Total for period

2. Iodines and Halogens Br-82 Br-84 Ci Ci Ci Ci

<LLD 3.97E-06

<LLD

<LLD 7.32E-OJ

<LLD

<LLD l.21E-05

<LLD

<LLD 6.1 lE-01

<LLD

<LLD 1.34E+OO

<LLD

<LLD I-131 Ci <LLD <LLD <LLD 2.08E-07 2.08E-07 1-132 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD <LLD I-134 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci <LLD <LLD <LLD <LLD <LLD Total for pe1iocl Ci <LLD <LLD <LLD 2.08E-07 2.08E-07

3. Particulates Cr-51 Ci <LLD <LLD <LLD 7.20E-05 7.20E-05 Mn-54 Ci 1.I7E-06 <LLD <LLD 4.48E-06 5.65E-06 Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD 2.90E-06 2.90E-06 Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 2.50E-05 2.22E-05 2.0SE-05 3.06E-05 9.83E-05 Zn-65 Ci <LLD <LLD <LLD 7.64E-06 7.64E-06 Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Nb-95 Zr-95 Mo-99 Ag-llOm Ci Ci Ci Ci

<LLD

<LLD a .

Sn-113 Ci <LLD <LLD <LLD <LLD <LLD Page 42 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-0 l 0/50-237 /50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Sn-117m Ci <LLD 4.96E-07 <LLD 5.13E-07 1.0lE-06 Te-123m Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Hf--"181 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci 2.62E-05 2.27E-05 2.0SE-05 1 .1 SE-04 .l.88E-04

4. Tritium Total for period Ci 5.67E-01 4.78E-01 4.38E-OI 5.58E-01 2.04E+OO

5. Gross Alpha Total for period Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for period Ci <LLD <LLD <LLD <LLD <LLD

.: (*): Units 1,2,3 mixed modes releases include Unit I Chemical Cleaning Building, Unit 2 Reactor Building Vent and Unit 3

. Reactor Building Vent.

Page 43 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

GASEOUS EFFLUENTS lJNJTS 1,2,3 (*) MIXED MODE RELEASES BATCH.MODE Nuclides Released Unit P' Quarter 2"d Quarter 3rd Quarter 4'11 Quarter ANNUAL Nuclides Released J. FissioJJ and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-131m Ci Xe-'133 Ci Xe-133m Ci Xe-135 Xe-135m Xe-138 Total for period

2. Iodines and Halogens Br-82 Ci Ci Ci Ci Ci None(*) None(*) None(*) None(*) None(*)

Br-84 Ci I-131 Ci 1-132 Ci 1-133 Ci I-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Zr-95 Mo-99 Ci Ci Ci Page 44 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Ag-l!Om Ci Licensee: Exelon Nuclear Sn-113 Ci Sn-1] 7m Ci Te-123m Ci Sb-124 Ci Sb-:125 C'

-l Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

4. Tritium Total for period Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-14 Total for period Ci None(*) None(*) None(*) None(*) None(*)

.. (*): Units 1,2,3 mixed modes releases .include Unit l Chemical Cleaning Building, Unit 2 Reactor Building Vent and Unit 3

Reactor Building Vent. No batch releases via these effluent paths .

Page 45 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

GASEOUS EFFLUENTS UNIT 1 CHEM1CAL CLEANING BUILDING MlXED MODE RELEASES CONTINUOUS MODE 1 111 Nuclides Released Unit 1 J*' Quarter 2"d Quarter 3" Quarter 4 Qumter ANNUAL L Fission ancl Activation Gases Ar-41 Ci NIA NIA NIA N/A N/A Kr-85 Ci N/A NIA N/A NIA N/A Kr-85m Ci N/A N/A N/A N/A N/A Kr-87 Ci N/A N/A N/A NIA NIA Kr-88 Ci NIA NIA NIA NIA NIA Xe-Blm Ci NIA NIA NIA NIA NIA Xe-133 Ci NIA NIA N/A NIA NIA Xe-133111 Ci N/A NIA NIA NIA NIA Xe-135 Ci NIA NIA NIA N/A NIA Xe-l35m Ci NIA NIA NIA NIA NIA Xe-138 Ci NIA NIA NIA NIA NIA Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD <LLD <LLD Br-84 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci <LLD <LLD <LLD <LLD <LLD I-132 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD <LLD 1-134 Ci <LLD <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci <LLD <LLD <LLD <LLD <LLD

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 1.29E-06 2.43E-06 2.67E-06 l.04E-06 7.44E-06 Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Page 46 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Ag-1 JOm Ci <LLD <LLD <LLD <LLD <LLD Sn-113 Ci <LLD <LLD <LLD <LLD <LLD S11-l l?m Ci <LLD <LLD <LLD <LLD <LLD Te-123m Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Cj <LLD <LLD <LLD <LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Hf-181 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci 1.29E-06 2.43E-06 . 2.67E-06 *1.04E-06 7.44E-06

4. Tritium Total for period Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Afoha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-14 Total for peliod Ci None(*) None(*) None(*) None(*) None(*)

. (*): Analysis not required per Dresden Station ODCM

Page 47 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

GASEOUS EFFLUENTS UNIT 1 CHEMICAL CLEANING BUILDING(*) MIXED Morm RELEASES BATCH MODE Nuclides Released Unit 1 1* Quarter 2nd Qmu-ter 3rd Quarter 111 4 Qumter ANNUAL

l. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-Blm Ci Xe-133 Ci Xe-l33m Ci Xe-135 Ci Xe-135m Ci Xe-138 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci I-131 Ci I-132 Ci I-133 Ci 1-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Mo-99 Ci Page 48 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through Decen1ber 20 I 7 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS:* 50-010/50-237/50-249 Facility: Dresden NucJear Power Station Units 1,2,3 Licensee: Exelon NucJear Ag-lJOm Ci Sn-113 Ci Sn-.! 17m Cj Te-J23m Ci Sb-*124 Ci Sb-125 Ci Cs-134 Ci Cs-137 Ci Ba-140 C']

Ce-141 Ci Ce-144 Ci Hf-181 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

4. Tritium Total for period Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-14 Total for oeriod Ci None(*) None(*) None('-') None(*) None(*)

. . (*): No batch releases via this effluent path

Page 49 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

OOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

GASEOUS EFFLUENTS UNIT 2 REACTOR BUILDING VENT MJXED MODE RELEASES CONTINUOUS MODE Nuclides RcJeased Unit JS! Quart er 2°d Quarter 3nl Qum*ter 4 111 Quarter ANNUAL Nnclides Released

l. Fission and Activation Gases Ar-41 Ci <LLD <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-l31m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD 3.71E-01 <LLD l.78E-Ol 5.49E-01 Xe-l33m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD 5.61E-06 <LLD 5.6IE-06 Xe-135m Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci <LLD 3.7lE-01 5.6!E-06 1.78E-01 5.49E-OI

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD <LLD <LLD Br-84 Ci <LLD <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD 9.50E-08 9.SOE-08 I-132 Ci <LLD <LLD <LLD <LLD <LLD I-133 Ci <LLD <LLD <LLD <LLD <LLD I-134 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci <LLD <LLD <LLD 9.50E-08 9.SOE-08

3. Particulates Cr-51 Ci <LLD <LLD <LLD 4.68E-05 4.68E-05 Mn-54 Ci 1.17E-06 <LLD <LLD l.61E-06 2.78E-06 Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD 1.04E-06 1.04E-06 Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 9.35E-06 5.13E-06 7.38E-06 1.22E-05 3.41E-05 Zn-65 Ci <LLD <LLD <LLD 5.34E-06 5.34E-06 Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Page 50 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-0 l 0/50-23 7/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Mo-99 Ci <LLD <LLD <LLD Licensee: Exelon Nuclear

<LLD <LLD Ag-JlOm Ci <LLD <LLD <LLD <LLD <LLD Sn-I 13 Ci <LLD <LLD <LLD <LLD <LLD Sn-l 17m Ci <LLD <LLD <LLD 5.13E-07 5.BE-07 Te-123m Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Hf-181 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci 1.0SE-05 5.13E-06 7.38E-06 6.75E-05 9.06E-05

4. Tritium Total for period Ci 2.09E-OI 1.99E-OJ 1.39E-01 2.05E-OI 7.52E-OJ

5. Gross Alpha Total for period Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for period Ci <LLD <LLD <LLD <LLD <LLD

Page 51 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNIT 2 REACTOR BUILDING VENT(*) MIXED MODE RELEASE..'i BATCH MODE Nuclides Released Unit !*" Quarter 2"" Quarter yc1 Quarter 4111 Quarter ANNUAL Nuclides Released

l. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci K.r-87 Ci Kr-88 Ci Xc-131 m Xe-133 Xe-133111 Xe-135 Xe-135111 Xe-138 Ci Ci Ci Ci Ci Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

2. Iodines and Halogens Br-82 Ci Br-84 Ci J-131 Ci 1-132 Ci 1-133 Ci I-134 Ci I-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Page 52 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKETNUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Zn-65 Ci Licensee: Exelon Nudear Nb-95 Ci Zr-95 Ci Mo-99 Ci Ag-1 JOrn Ci Sn-113 Ci Sn-117rn Ci Te-123m Ci Sb-124 Ci Sb-125 Ci Cs-134 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Ce-]44 Ci Hf-181 Ci Total for 1Jeriod Ci Noue (*) None(*) None(*) None(*) None(*)

4. Tritium Total for period C".I None(*) None(*) None C') None(*) None(*)

5. Gross Alpha

Toti1l for period

6. Carbon-14 Total for period Ci Ci

(*): No batch releases via this effluent path None(*)

None(*)

None("')

None(*)

None{*)

None(*)

Page 53 of 139

DRESDEN NUCLEARPOWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear GASEOUS EFFLUENTS UNIT 3 REACTOR BtHLDlNG VENT MIXED MODE RELEASES CONTINUOUS MODE Nuclides Released Unit 1s1 Quarter 2"d Quarter 3ru Quarter 4 111 Quarter ANNUAL Nuclides Released J. Fission and Activation Gases Ar-41 Ci <LLD <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85111 Kr-87 Kr-88 Xe-131 m Xe-'133 Xe-133m Ci Ci Ci Ci Ci Ci

<LLD

<LLD 3.61E-01

<LLD

<LLD 4.33E-01

<LLD

<LLD 7.94E-01

<LLD Xe-'135 Ci 3.97E-06 <LLD 6.49E-06 5.93E-06 l.64E-05 Xe-l35m Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci 3.97E-06 3.6lE-01 6.49E-06 4.33E-01 7.94E-01

2. Iodines and Halogens Br-82 Ci <LLD <LLD <LLD <LLD <LLD Br-84 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci <LLD <LLD <LLD 1.13E-07 1.13E-07 I-132 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci .<Lill <LLD <LLD <LLD <LLD I-134 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci <LLD <LLD <LLD l.13E-07 1.13E-07

3. Particulates Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD 2.52E-05 2.52E-05 Mn-54 Ci <LLD <LLD <LLD 2.88E-06 2.88E-06 Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD 1.86E-06 1.86E-06 Page 54 of 139

DRESDEN NUCLEAR POWER-STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci 1.44£-05 l.46E-05 1.05E-05 1.73E-05 5.67E-05 Zn-65 Ci <LLD <LLD <LLD 2.30E-06 2.30E-06 Nb-95 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Ag-llOm Ci <LLD <LLD <LLD <LLD <LLD Sn-] 13 Ci <LLD <LLD <LLD <LLD <LLD Sn-1 J 7m Ci <LLD 4.96E-07 <LLD <LLD 4.96E-07 Te-123m Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Sb-.125 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD

Hf-J 81 Ci <LLD <LLD <LLD <LLD <LLD Total for period Ci l .44E-05 1.5lE-05 ].05E-05 4.96E-05 8.95E-05

4. Tritium Total for period Ci 3.58E-OI 2.79E-OJ 2.99E-OJ 3.53E-OI .l.29E+OO

5. Gross Alpha Total for period Ci <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 Total for period Ci <LLD <LLD <LLD <LLD <LLD

Page 55 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

OOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

GASEOUS EFFLUENTS

u. NlT 3 REACTOR BUILDING VENT (*) MIXED MODE RELEASES BATCH MODE Nuclides Released Unit 1si Quarter 2"~ Quarter 3rd Quarter 4 111 Quarter ANNUAL Nuclides Released I. Fission and Activation Gases Ar-41 Ci Kr-85 Ci Kr-85m Ci Kr-87 Ci Kr-88 Ci Xe-13:lm Ci Xe-133 Ci Xe-J33m Xe-135 Xe-I35m Xe-138 Total for period

2. Iodines and Halogens Ci Ci Ci Ci Ci None(*) None(*) None(*) None(*) None(*)

Br-82 Ci Br-84 Ci I-131 Ci 1-132 Ci I-133 Ci 1-134 Ci 1-135 Ci Total for period Ci None(*) None(*) None(*) None(*) None(*)

3. 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 Nb-95 Ci Zr-95 Ci Page 56 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Mo-99 Ci Ag-1 lOm Ci Sn-113 Ci Sn-117m Ci Tc-l23rn Ci Sb-124 Ci Sb-125 Ci Cs-134 Ci Cs-J37 Ci Ba-140 Ci Ce-141 Ci Ce-144 Ci Hf-181 Ci Total for period Ci None(*) None(*) None(*) None e) None(*)

4. Tritium Total for pe1iod Ci None(*) None(*) None(*) None(*) None(*)

5. Gross Alpha Total for period Ci None(*) None(*) None(*) None(*) None(*)

6. Carbon-14 Total for period

Ci None(*) None(*) None(*) None(*) None(*)

. (*): No batch releases via this effluent path

Page 57 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 t 7 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

UNITS 1,2,3 (*) LIQUID EFFLUENTS SUMMATION OF ALL RELEASES P' 2ml 3nt 4th Est. Total Units Quarter Quarter Quai1er Quarter En-or,%

A p*ISSIOII

. an d act1val1on pmducts

1. Total release (not including H-3, ~.ases, alnha) Ci <LLD <LLD <LLD <LLD 1.95E+OI I

2. Average diluted concentration during oeriocl uCi/ml O.OOE+OO 0.00E+OO 0.00E+OO O.OOE+OO

3. Percent of aoolicable dose limit - organ % (**) N/A N/A N/A N/A B T1itium J. Total release Ci 3.97E-02 4.25E-02 3.30E-02 6.0SE-02 2.37E+OO I

2. Average diluted concentration during oeriod uCi/ml l.68E-l l l.81E-1l 1.39E-J I 2.56E-11

3. Percent of apolicable dose limit - whole bodv % (**) 9.67E-06 J.03E-05 8.04E-06 l.47E-05 C D"1sso vec an d entrarnec gases

l. Total release Cj <LLD <LLD <LLD <LLD 2.03E+OI I

2. Average diluted concentration during oeriod uCilml O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of aoolicable dose limit - organ % (**) NIA NIA NIA NIA I

D. Gross alpha activity

1. Total release Ci <LLD <LLD <LLD <LLD

2.00E+OI E. Volume of waste released (2rior to dilution) Liters 4.91E+06 4.96E+06 5.01E+06 5.0lE+06 I F. Volume of dilution water used during Qeriod Liters 2.37E+l2 2.34E+12 2.37E+l2 2.37E+12

(*): The values in these tables include Storm Sewer System and Sewage Treatment System unmonitored effluent path.

(**): These percentages are calculated referencing the quarterly "per unit" limits Page 58 of 139 I-

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nucl~ar Power Station Units 1,2,3 Licensee: Exelon Nuclear UNIT I(*) LIQUID EFFLUENTS SUMMATION OF ALL RELEASES Units

] " 2ml 3rd 41h Est. Total Quarter Quarter Quarter Quarter EITor, %

A F'lSSJOfl

. an d act1vat10n pro ducts J. Total release (not including H-3, gases, aloha) Ci <LLD <LLD <LLD <LLD 1.95E+Ol I

2. Average diluted concentration during period uCilml O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of applicable dose limit - organ % NIA NIA NIA NIA B. Tritium I. Total release Ci <LLD <LLD <LLD <LLD 2.37E+OO I

2. Average diluted concei1tration during period u.Cilml O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of aoolicable dose limit - whole bodv % NIA NIA NIA NIA C o*1sso vec . d gases anc entnune I. Total release Ci <LLD <LLD <LLD <LLD 2.03E+OI

2. Average diluted concentration during Dcriod u.Cilml O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO

3. Percent of applicable dose limit - organ % NIA NIA NIA NIA

.D. Gross alpha activity I I. Total release Ci <LLD <LLD <LLD <LLD 2.00E+OI E. Volume of waste released (~rior to dilution2 Liters NIA NIA NIA NIA IF. Volume of dilution water used during 2eriod Liters NIA NIA NIA NIA

(*): The values in this these tables include the Sewage Treatment unmonitored effluent path .

Page 59 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

UNIT 2 (*) LIQUID EFFLUENTS SUMMATION OF ALL RELEASES pi 21111 3nl 4th Est. Total Units Quarter Quarter Quarter Quarter Error,%

A FISSIOn

. an d acuvat1on pro ducts

1. Total release (not including H-3, gases, alpha) Ci <LLD <LLD <LLD <LLD I .95E+01 I

2. Average diluted concentration dmjng period itCi/ml O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO

3. Percent of applicable dose limit - organ % NIA NIA NIA NIA B. Tritium J. Total release Ci l.98E-02 2.12E-02 1.65E-02 3.02E-02 2.37E+OO I

2. Average diluted concentration during petiod uCilml l.68E-1I I.81E-ll 1.39E-ll 2.56E-IJ

3. :Percent of applicable dose limit - whole body % 4.83E-06 5.17E-06 4.02E-06 7.37E-06 C o*ISSOIved anc . d gases entrame I. Total release Cj <LLD <LLD <LLD <LLD 2.03E+OI I

2. Average dilllted concentration during period uCilml O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of applicable dose limit - organ % NIA NIA NIA NIA I

D. Gross alpha activity I. Total release Ci <LLD <LLD <LLD <LLD

2.00E+OI I E. Volume of waste released' (Qrior to dilution) Liters 2.45E+06 2.48E+06 2.51E+06 2.51E+06 I F. Volume of dilution water used during 2eriod Liters 1.l8E+ 12 1.17E+12 1.18E+12 l.18E+12

(*): The values in these tables include the Storm Sewer System unmonitored effluent path. The Storm Sewer System is 50%

allocated to Unit 2.

Page 60 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT

.January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 UNIT 3 (*) LIQUID EFFLUENTS SUMMATION OF ALL RELEASES Licensee: Exelon Nuclear Units P' 2nd 3rd 41h Est. Total Quarter Quarter Quarter Quarter Error,%

~-

A F ... an d act1vat10n pro ducts

. 'ISSIOTI

]. Total release (not including H-3, eases, alnha) Ci <LLD <LLD <LLD <LLD l.95E+OI J

2. Avernge diluted concentration during oeriod uCi/rnl O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

3. Percent of aoolicable dose. limit - organ % NIA NIA NIA NIA B Tritium I. Total release Ci I.98E-02 2.] 2E-02 I .65E-02 3.02E-02 2.37E+OO J

2. Average diluted concentration durini! oeriod uCilml I.68E-1 J 1.8IE-1I I .39E-1 I 2.56E-ll

3. Percent of armlicable dose limit: - whole bodv % 4.83E-06 5.17E-06 4.02E-06 7.37E-06 C IYJSSO Ve( an d entramec gases I. Total release Ci <LLD <LLD <LLD <LLD 2.03E+OI I

2. Average. diluted concentration during l)eriod uCilml O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO

3. Percent of anolicable dose limit - organ % NIA NIA NIA NIA

I D. Gross alpha activity I. Total release Ci <LLD <LLD <LLD <LLD 2.00E+Ol I E. Volume of waste released (12rior to dilution} Liters 2.45E+06 2.48E+06 2.5lE+06 2.51E+06 I F. Volume of dilution water used dming 2e1iod Liters 1.18E+l2 l.17E+l2 J.18E+l2 1.18E+ 12

(*): The values in these tables include the Storm Sewer System unmonitored effluent path. The Storm Sewer System is 50% allocated to Unit 3.

Page 61 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 TABLE OF LOWER LIMITS OF DETECT ABILITY FOR LIQUID EFFLUENTS Licensee: Exelon Nuclear I. FlSSION/ AC11VATlON GASES µCi/ml Kr-87 1.00E-05 Kr-88 LOOE-05 Xe-133 I.OOE-05 Xe-133m 1.00E-05 Xe-135 J .OOE-05 Xe-138 1.00E-05

2. IODJNES µCi/ml 1-131 l.OOE-06

3. PARTICULATES µCi/ml Fe-55 l.OOE-06.

Sr-89 5.00E-08 Sr-90 5.00E-08 Mn-54 5.00E-07 Co-58 5.00E-07 Fe-59 5.00E-07 Co-60 5.00E-07 Zn-65 5.00E-07 Mo-99 5.00E-07 Cs-134

5.00E-07 Cs-137 5.00E-07 Ce-141 5.00E-07 Ce-144 5.00E-06

4. OTHER µCi/ml H-3 1.00E-05 Gross Alpha 1.00E-07 The above values are the ODCM-required LLDs.

Page 62 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-0 I 0/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 LIQUID EFFLUENTS Licensee: Exelon Nuclear UNIT J SEWAGE TREATMENT PLANT (*) CONTINUOUS MODE Unit I"' Quarter 2nt1 Quarter 3rt1 Quarter 41" Quarter Annual Fe--55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD <LLD J-133 Ci <LLD <LLD <LLD <LLD <LLD 1-J35 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD <LLD Ru-103 Ci <LLD <LLD <LLD <LLD <LLD Ag-fJOm Ci <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-136 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Total Ci <LLD <LLD <LLD <LLD <LLD H-3 Ci <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total Ci <LLD <LLD <LLD <LLD <LLD

(*): The Sewage Treatment Plant is l 00% allocated to Unit I .

Page 63 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237 /50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 1 SEWAGE TREATMENT PLANT (*) BATCH MODE Unit I ' 1 Quarter 2"" Quarter 3'"" Quarter 4 1 ' Qum1er Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci 1-131 Ci 1-133 Ci I-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99111 Ci Ru-103 Ci Ag-1 ]Om Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-B8 Ci Total Ci None(* None

None

None(*) None(*)

(*): No batch releases via this effluent path Page 64 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January througll December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LJQlllD EFFLUENTS UNJT 2 STORM SEWER SYSTEM (*) CONTINUOUS MODE Unit I Quarter 2"' Quarter 3" Quarter 4rh Quarter Annual Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD <LLD

]-135 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Tc-99111 Ci <LLD <LLD <LLD <LLD <LLD Ru-103 Ci <LLD <LLD <LLD <LLD <LLD Ag-1 JOm Ci <LLD <LLD *<LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-136 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <'LLD <'LLD <LLD <LLD <LLD Ba-.140 Ci <LLD <LLD <LLD <LLD <LLD Ce-*141 Ci <LLD <LLD <LLD <LLD <LLD Total Ci <LLD <LLD <LLD <LLD <LLD H-3 Ci l.98E-02 2.12E-02 l.65E-02 3.02E-02 8.78E-02 Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <'LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total Ci l.98E-02 2.I2E-02 1.65E-02 3.02E-02 8.78E-02

(*): The Storm Sewer System is 50% allocated to Unit 2 .

Page 65 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKETNUMDERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 2 STORM SEWER SYSTEM (*) BATCH MODE Unit :I 51 Quarter 211 Quarter 311 Quarter 4rh Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci I-131 Ci 1-133 Ci 1-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-110m Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-14*1 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path Page 66 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 3 STORM SEWER SYSTEM (*) CONTINUOUS MODE Unit J ' 1 Ot1arter 2m1 Quarter 3n1 Quarter 4 11> Quarter Annual fie-55 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD I-131 Ci <LLD <LLD <LLD <LLD <LLD l-133 Ci <LLD <LLD <LLD <LLD <LLD I-135 Ci <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD

Mo-99 Tc-99m Ru-103 Ag-I 10m Sb-124 Cs-*134 Ci Ci Ci Ci Ci Ci

<LLD

<LLD Cs-136 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Total Ci <LLD <LLD <LLD <LLD <LLD H-3 Ci 1.98E-02 2.12E-02 1.65E-02 3.02E-02 8.78E-02 Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total Ci 1.98E-02 2.l2E-02 l .65E-02 3.02E-02 8.78E-02

(*): The Storm Sewer System is 50% allocated to Unit 3 .

Page 67 of I 39

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 3 STORM SEWER SYsrnM (*) BATCH MODE Unit J*'1 Quarter 2nt1 Quarter 3rt1 Quarter 4 111 Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci 1-] 31 Ci 1-133 Ci J-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-110m Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*); No batch releases via this effluent path Page 68 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units J ,2,3 Licensee: Exelon Nuclear LJQUJD EFFLUENTS UNIT 2 RAD WASTE ( *) CONTINUOUS MODE Unit 1*" Quarter 2m1 Quarter 3n1 Quarter 4 1" Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci I-131 Ci

].] 33 Ci I-135 Ci Cr-51 Ci Mn-54 c*.I Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-llOm Ci Sb-125 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-B8 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No continuous releases via this effluent path

Page 69 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 2 RADWASTE (*) BATCH MODE Unit '1'1 Qumter 211 t1 Quarter 3rt1 Quarter 4'" Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci 1-131 Ci l-133 Ci I-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ag-I ]Om Sb-124 Cs-134 Cs-136 Cs-137 Ci Ci Ci Ci Ci Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*}

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path Page 70 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden NucJear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNJT 3 RADWASTE (*) CONTINUOUS MODE Unit 1"1 Quarter 2"d Quarter 3'd Quarter 4 1" Quarter Annuul Fe-55 Ci Sr-89 Ci Sr-90 Ci l-131 Ci 1-133 Ci 1-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-110rn Ci Sb-125 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-133rn Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No continuous releases via this effluent path

Page 71 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNJT3 RADWASTE(*) BATCH MODE Unit F 1 Quarter 2n<I Quarter 3rd Quarter 4 1h Quarter Annual Fe-55 Ci Sr-89 C'l Sr-90 Ci 1-131 Ci 1-] 33 Ci I-135 Ci Cr-51 C".I Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-1 !0m Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-133m Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path Page 72 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UN1T 2 CONTAJNMENT COOLING SERVICE WATER(*) CONTINUOUS MODE Unit P' Quarter 2'"1 Quarter 3n Quarter 4' Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci 1-131 Ci l-133 Ci

]-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-*110111 Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci

Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None *) None(*) None *) None(*)

(*): No continuous releases via this effluent path

Page 73 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RAD10ACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237 /50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNJT 2 CONTAJNMENT COOUNG SERVJCE WATER(*) BATCH MODE

'Unit J-1 1 Quarter 2 11 d Quarter 3rd Quai1er 4i1i Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci 1-131 Ci 1-133 Ci J-135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci F<e-59 Ci Co-60 Ci Zn-65 C1 Zr-95 c*1 Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-llOm Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path.

Page 74 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units I ,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 3 CONTAINMENT COOLING SERVICE WATER (*) CONTINUOUS MODE Unit l~ 1 Quarter 2nd Quarter 3rd Quarter 4 1h Quarter Annual Fe-55 Ci Sr-89 Ci Sr-90 Ci I-131 Ci I-133 Ci I-:135 Ci Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr--95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-1 JOm Ci Sb-124 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No continuous releases via this effluent path

Page 75 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 EFFLUENT AND WASTE DISPOSAL

SUMMARY

DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear LIQUID EFFLUENTS UNIT 3 CONTAJNMENT COOLING SERVJCE WATER(*) BATCH MODE Unit pt Quarter 2nd Quarter 3rd Quarter 4th Quarter Annual Fe-55 Ci Sr-89 Cj Sr-90 Ci l-13] Ci

]-133 Ci l-135 Cj Cr-51 Ci Mn-54 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Zr-95 Ci Mo-99 Ci Tc-99m Ci Ru-103 Ci Ag-Il0m Ci Sb-] 24 Ci Cs-134 Ci Cs-136 Ci Cs-137 Ci Ba-140 Ci Ce-141 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

H-3 Ci Kr-87 Ci Kr-88 Ci Xe-133 Ci Xe-135 Ci Xe-138 Ci Total Ci None(*) None(*) None(*) None(*) None(*)

(*): No batch releases via this effluent path Page 76 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (Not irradiated fuel)

Types of Waste Type of Waste Unit 12-Month Period Est. Total Error, %

a. Spent resins, filter sludges/ filters, evaporator rn'.I I.60E+02

+/- 2.50E+OJ bottoms, etc. Ci 9.2lE+02

b. Dry compressible waste, contaminated m3 8.43E+02

+/- 2.50E+OI equipment, etc. Ci J.BE+Ol C. Irradiated components, control rods, etc. rn:i O.OOE+OO NIA Ci O.OOE+OO

d. Other - Contaminated Oil m3 O.OOE+OO

+/- 2.SOE+OI Ci O.OOE+OO Estimate of Major (i.e., 21 %) Nuclide Composition (by Type of Waste) a Spent resins, filters/ filter sludges, evaporator bottoms, etc.

Nuclide Fe-55 Co-60 Cs-137 Zn-65 Ni-63 Percent%

49.81 36.99 6.55 2.53 1.54 Curies 4.59E+02 3.41E+02 6.03E+01 2.33E+01 1.41E+01 Mn-54 1.27 1.17E+01 Shipment type: LSA, Type B Solidification agent or absorbent: None

b. Dry compressible waste, contaminated equipment, etc.

Nuclide Percent% Curies Fe-55 54.14 6.12E+OO Co-60 28.89 3.26E+OO Mn-54 8.23 9.30E-01 Zn-65 3.61 4.0SE-01 Cs-137 1.75 1.97E-01 Shipment type: LSA Solidification agent or absorbent: None C. Irradiated components, control rods, etc.

Nuclide Percent% Curies NONE N/A N/A Page 77 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS DOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear cl. Other - N/A Nuclide Percent% Curies NONE N/A N/A Solid Waste Disposition Number of Shipments Mode of Transportation Destination 34 Motor freight (exclusive nse only) Energy Solutions - Bear Creek Road, Oak Ridge, TN 21 Motor freight (exclusive use only) Energy Solutions - Clive, UT 5 Motor freight (exclusive use only) Waste Control Specialists - Andrew, TX IRRADIATED FUEL SHIPMENTS (DISPOSITION)

Number of Shipments NONE CHANGES TO THE PROCESS CONTROL PROGRAM Mode of Transportation NIA Destination NIA ln 2017, a change was made to the Dresden Station Process Control Program with the approval of Revision 12 ofRW-AA-100, Process Control Program for Radioactive Wastes. The change was a minor change to provide reference information related to additional fleet power plants, and did not affect the processing of radioactive waste at Dresden Staion. Revision 12 of RW-AA-100 is included as Attachment 2 of this document.

MAJOR CHANGES TO RADIOACTIVE WAST TREATMENT SYSTEMS There were no ITu'tjor changes to the radioactive liquid, gaseous, or solid waste treatment systems in 2017.

Page 78 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 RADIOLOGICAL IMPACT ON MAN DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

1. Doses to a Member of the Public due to Liquid Releases in 2017 (from 01101/2017 to 12131 /2017):

UNITS l,2,3 Total Body: 6.42E-07 mrem Organ: 6.42E-07 mrem UNIT 1 Total Body: NIA Organ: NIA UNIT2 Total Body: 3.21E-07 mrem Organ: 3.21E-07 mrem UNIT3 Total Body: 3.21E-07 mrem Organ: 3.21E-07 mrem The nbove annual liquid dose values are reported per Dresden-site (UNITS 1,2,3) as well as per each individual reactor unit (UNIT 1., UNIT 2, UNIT 3). Regulatory annual liquid dose limits are listed on page I section l .d.3) and section 1.d.4), of this report as well as in Dresden ODCM. The above annual liquid dose values are well below any regulatory

2.

limits .

Doses to a Member of the Public due to Gaseous Releases in 2017 (from 01/01/2017 to 12131/2017):

UNITS 1,2,3 Gamma air (fission and activation gases): l .58E-03 nu*ad Beta air (fission and activation gases): 8.32E-05 mrad Total Body (noble gases): 1.0SE-03 mrem Skin (noble gases): J.79E-03 mrem Organ - bone (radioiodinesltritiumlpaiticulates): 8.89E-02 mrem UNIT 1 Gamma air (fission and activation gases): NIA Beta air (fission and activation gases): NIA Total Body (noble gases): NI A Skin (noble gases): NIA Organ - liver (radioiodinesltritium/pai*ticulates): 2.71E-03 mrem UNIT2 Gamma air (fission and activation gases): 6.46E-04 nu*ad Beta air (fission and activation gases): 3.46E-05 nu*ad Total Body (noble gases): 4.29E-04 mrem Skin (noble gases): 7.35E-04 mrem Organ - bone (radioiodines/tritium/particulates): 4.24E-02 nu*em UNIT3 Gamma air (fission and activation gases): 9.29E-04 mrad Beta air (fission and activation gases): 4.86E-05 mrad Total Body (noble gases): 6.I7E-04 mrem Page 79 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 RADIOLOGICAL IMPACT ON MAN DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Stat.ion Units 1,2,3 Licensee: Exelon Nuclear Skin (noble gases): l.OSE-03 mrem Organ - bone (radioiodines/tritium/particulates): 4.53E-02 mrem The above annua1 gaseous dose values are reported per Dresden-site (UNlTS l ,2,3) as we)) as per each individual reactor unit (UNIT l, UNJT 2, UNIT 3). Regulatory annual gaseous dose limits are listed on page 1 section 1.a. and section l .b.,c., of tlris report as well as in Dresden ODCM. The above annual gaseous dose values are well below any regulatory limits.

3. Doses to a Member of the Public due lo Direct Radiation in 2017 (from 01/01/2017 to 12/31/2017):

UNITS J,2,3 Total Body (skyshine): 8.78E+OO mrem UNITS I Total Body (skyshine): NIA UNITS2 Total Body (skyshine): 4.2lE+OO mrem UN.ITS 3 Total Body (skyshine): 4.57E+OO mrem The above annual direct dose values are reported per Dresden-site (UNITS 1,2,3) as well as per each individual reactor unit (UNIT 1, UNIT 2, UNIT 3). These numbers are calculated per ODCM methodologies, and are used to demonstrate compliance with 40CFR190 total dose limit requirements listed on page l section l .e, of this report as well as in Dresden ODCM.

4. Total body closes to the population and average doses to individuals in the population from all receiving-water-related-pathways are not applicable to Dresden Station. No downstream drinking water pathway exist within the specified distance of 10 kilometers (6.2miles).

5. Total body closes to the population and average doses to individuals in the population from gaseous effluents to a distance of 50 miles from the site are not applicable to Dresden Station.

6. Doses from liquid and gaseous effluent to members of the public due to their activities inside the site boundary for the report period are not applicable to Dresden Station. Any member of the public who is onsite for a significant period of time is issued an Optical Stimulated Luminescent Dosimeter (OSLD) to monitor direct radiation exposure.

7. For the report petiod, there were no effluent radiation monitors that exceeded the ODCM a11owed inoperability time.

8. 40CFR190 / 10CFR72 Compliance:

The General Electric Hitachi Nuclear Energy Morris Operation (GEH MotTis Operation) facility is physically

located near Dresden Station, hence it is considered in the evaluation of the uranium fuel cycle on members of the public in the general environment.

Page 80 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 RADIOLOGICAL IMPACT ON MAN DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Stat.ion Units 1,2,3 Licensee: Exelon Nuclear Dresden decommissioning activities (Unit l) and operations (Units 2 and 3) resulted in a maximum 8.89E-02 mrem organ dose and 8.?8E+OO mrem total body dose. The Radiological Environmental Monitoring Program (REMP) direct radiation monitoring at or near tlie site boundary demonstrates tJiat total body close calcu]atious to account for skyshine as found in the ODCM are conservative.

No effluents were released from the Dresden Independent Spent Fuel Storage lnsta11ations (JSFSls) during 2017.

REMP direct radiation monitoring at or near the site boundary demonstrates that the ISFS1s do not result in measurable dose to U1e public.

According to the 2017 GEH Morris Operation 10CFR72.44(d)(3) rep011, dated 2/20/2018, for the 2017 calendar year, the maximum close at their site boundary from direct radiation exposure was 3.83E-OJ mrem. The maximum organ dose from site activities was 3.!0E-07 mrem for 2017.

Maximum combined total body dose from Dresden Station uncl GEH Morris Operation activities was 9.I 6E+OO mrem during 2017, which was 36.64 % of the 40CFR190 limit of 25 mrem.

Max.imum combined organ dose from Dresden and GEH Morris Operation activities was 8.89E-02 mrem during 2ffl7.

This was 0.36 % of the 40CFR.190 limit of25 mrem to any organ. The combined thyroid dose was 7.07E-02 mrem. This was 0.09 % of the 40CFR190 limit of75 mrem .

Page 81 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: January - March 2017 Stability Class - Extremely Unstable - 150F't-35Ft Delta-'I' (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Directio11 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 1 0 0 0 :L NE 0 0 0 0 0 0 0 ENE 0 0 1 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 3 0 0 3 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 0 0 s 0 1 1 0 0 0 2 SSW 0 0 0 1 1 0 2 SW 0 0 2 0 6 0 8 WSW 0 2 1 1 0 0 4 w 0 0 0 3 2 1 6 WNW 0 0 4 0 0 0 4 NW 0 0 3 5 1 0 9 NNW 0 1 2 5 0 0 8 Variable 0 0 0 0 0 0 0 Total 0 4 15 19 10 1 49 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 Page 82 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: January - March 2017 Stability Class - Moderately lh1stable - 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 3 0 0 0 5 NNE 0 0 1 0 0 0 1 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 0 0 0 1 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 1 1 1 0 0 3 s 0 0 3 0 0 0 3 SSW 0 1 2 0 0 0 3 SW 0 0 3 0 0 0 3 WSW 0 3 2 0 0 0 5 w 0 1 1 3 0 1 6 WNW 0 0 4 0 1 0 5 NW 0 0 10 0 1 0 11 NNW 0 1 3 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 9 34 5 2 1 51 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

Page 83 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: January - March 2017 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 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 0 2 0 0 0 2 E 0 2 1 0 0 0 3 ESE 0 0 0 0 0 0 0 SE 0 1 1 1 0 0 3 SSE 0 0 0 3 0 0 3 s 0 2 2 1 0 0 5 SSW 0 0 3 2 1 0 6 SW 0 1 0 0 0 0 1 WSW 0 1 1 0 0 0 2 w 0 1 1 0 0 0 2 WNW 0 2 4 2 0 0 8 NW 0 0 4 0 0 0 4 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 11 20 9 1 0 41 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 Page 84 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: January - March 2017 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 3 8 17 6 0 0 34 NNE 2 9 7 0 0 0 18 NE 1 17 8 0 0 0 26 ENE 3 6 8 2 0 0 19 E 2 7 10 1 0 0 20 ESE 3 6 3 3 0 0 15

s SE SSE SSW 1

0 0

1 6

4 14 4

12 10 11 4

16 14 4

8 0

0 6

0 0

0 15 24 46 30 SW 0 3 10 5 0 0 18 WSW 2 9 3 4 1 0 19 w 1 10 16 24 8 0 59 WNW 0 3 37 7 1 0 48 NW 1 10 22 4 1 0 38 NNW 1 6 18 3 0 0 28 Variable 0 0 0 0 0 0 0 Total 21 122 196 101 17 0 457 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

Page 85 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

Dresden Generating Station Period of Record: January - March 2017 Stability Class - Slightly 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 7 31 19 3 0 0 60 NNE 10 28 23 2 0 0 63 NE 1 30 27 4 0 0 62 ENE 6 41 18 0 0 0 65 E 3 60 30 2 0 0 95 ESE 4 24 40 6 0 0 74 SE 4 9 23 6 0 0 42 SSE 2 35 40 24 0 0 101 s 5 14 21 41 17 8 106 SSW 2 13 18 5 0 0 38 SW 3 8 11 7 1 0 30 WSW 2 12 17 14 0 0 45 w 4 35 72 30 5 0 146 WNW 9 56 92 35 2 0 194 NW 2 48 72 10 0 0 132 NNW 6 35 42 6 0 0 89 Variable 0 0 0 0 0 0 0 Total 70 479 565 195 25 8 1342 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 Page 86 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237 /50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: January - March 2017 Stability Class - Moderately Stable - 150Ft-35Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mpb)*

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 1 1 0 0 0 5 NNE 5 3 0 0 0 0 8 NE 0 1 0 0 0 0 1 ENE 2 1 0 0 0 0 3 E 1 0 0 0 0 0 1 ESE 2 15 0 0 0 0 17 SE 1 3 0 0 0 0 4 SSE 7 5 0 0 0 0 12 s 6 7 2 0 0 0 15 SSW 6 22 3 0 0 0 31 SW 4 10 11 1 0 0 26 WSW 4 5 3 0 0 0 12 w 5 6 0 0 0 0 11 WNW 3 3 0 0 0 0 6 NW 8 6 0 0 0 0 14 NNW 6 3 0 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 63 91 20 1 0 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: 3

Page 87 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-0) 0/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

Dresden Generating Station Period of Record: January - March 2017 Stability Class - Extremely Stable - 150Ft-35Ft. DeJ.ta-T (F)

Winds Measured at 35 Feet Wind Speed (ir1 mph)

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

.ESE 2 0 0 0 0 0 2 SE 1 0 0 0 0 0 1 SSE 2 0 0 0 0 0 2 s 2 0 0 0 0 0 2 SSW 7 1 0 0 0 0 8 SW 4 4 0 0 0 0 8 WSW 3 1 0 0 0 0 4 w 3 0 0 0 0 0 3 WNW 3 0 0 0 0 0 3 NW 2 0 0 0 0 0 2 NNW 1 1 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 35 7 0 0 0 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: 3 Page 88 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 J7 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-0] 0/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: January - March 2017 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 0 0 0 0 0 NNE 0 0 0 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 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 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 1 0 0 1 NNW 0 0 0 1 1 0 2 Variable 0 0 0 0 0 0 0 Total 0 0 0 2 1 0 3 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

Page 89 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: January - March 2017 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 3 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 2 0 2 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 0 1 0 0 4 5 WSW 0 0 0 0 0 1 1 w 0 0 0 0 2 2 4 WNW 0 0 2 4 3 0 9 NW 0 0 0 4 0 0 4 NNW 0 0 1 4 1 0 6 Variable 0 0 0 0 0 0 0 Total 0 0 8 13 8 7 36 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 Page 90 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: January - March 2017 Stability Class - Slightly Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind Direction 1-3 *l-7 8-12 13-18 19-24 > 24 Total N 0 0 3 2 0 0 5 NNE 0 0 2 0 0 0 2 NE 0 1 0 0 0 0 1 ENE 0 0 2 0 0 0 2 E 0 0 4 0 0 0 4 ESE 0 0 0 0 3 0 3 SE 0 0 2 0 1 0 3 SSE 0 0 3 3 1 0 7 s 0 0 6 0 0 0 6 SSW 0 1 0 2 0 1 4 SW 0 2 2 4 0 2 10 WSW 0 3 4 0 1 0 8 w 0 1 3 4 3 4 15 WNW 0 1 6 11 1 0 19 NW 0 0 2 14 2 3 21 NNW 0 0 3 3 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 9 42 43 12 10 116 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

Page 91 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: Jcmuary - March 2017 Stctbili ty 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 1 5 32 29 4 0 71 NNE 1 6 17 15 3 0 42 NE 1 7 29 29 6 0 72 ENE 3 10 45 20 3 0 81 E 1 8 26 23 9 1 68 ESE 4 1 21 29 9 3 67 SE 3 6 7 12 4 0 32 SSE 0 6 8 29 25 2 70 s 1 7 10 24 42 38 122 SSW 2 6 10 23 15 3 59 SW 0 5 8 17 3 1 34 WSW 0 6 10 7 14 3 40 w 0 5 9 62 28 31 135 WNW 1 2 22 82 52 8 167 NW 1 2 27 63 26 5 124 NNW 3 4 27 36 8 0 78 Variable 0 0 0 0 0 0 0 Total 22 86 308 500 251 95 1262 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 62 Hours of missing stability measurements in all stability classes: 3 Page 92 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units l ,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: January - March Stability Class - Slightly Stable 2017

- 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 12 6 1 0 22 NN.E 1 5 15 2 0 0 23 NE 0 5 6 5 0 0 16 ENE 1 2 5 4 0 0 12 E 0 2 3 15 0 0 20 ESE 0 0 3 11 3 0 17

s SSW SE SSE 1

0 0

1 0 2

0 4

12 12 6

3 21 18 28 15 5 9

8 5 1 0

0 2

40 41 40 32 SW 0 0 10 20 11 4 45 WSW 0 3 6 13 15 4 41 w 0 2 6 22 7 0 37 WNW 0 0 18 28 8 1 55 NW 0 5 19 26 8 0 58 NNW 0 5 10 19 1 1 36 Variable 0 0 0 0 0 0 0 Total 4 38 146 253 81 13 535 Hours of calm in this stability class:

Hours of missing wind measurements 0 in this stability class: 4 Hours of missing stability measurements in all stability classes:

3

Page 93 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January Lhrough December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237 /50-249 Licensee: Exelon Nuclear Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Period of Record: January - March 2017

- 300Ft-35Ft Delta-T (F)

Stability Class - Moderately Stable Winds Measured at 300 Feet Wind Speed (in mph)

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

0 0 0 4 0 0 4 NNE 0 0 0 5 1 4 0 NE 0 0 0 1 0 1 0 ENE 0 0 0 1 0 1 0 E

0 0 4 1 2 0 1 ESE 8 0 0 15 0 4 3 SE 3 0 0 7 0 0 4 SSE 0 0 4 1 0 1 2 s

4 7 0 13 SSW 1 0 1 9 2 0 25 1 1 12 SW 2 2 0 9 0 1 4 WSW 4 0 0 16 1 1 10 w

0 0 4 0 2 1 1 WNW 1 0 0 6 1 1 3 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 Variable 0 0 0 36 11 0 121 7 20 47 Total 0

Hours of calm in this stability class: in this stability class: 0 missing wind measurements Hours of missing stability measurements in all stability classes: 3 Hours of Page 94 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-0 l 0/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: January - March 2017 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 '.I'otcil N 0 2 2 1 0 0 5 NNE 0 l 0 0 0 0 l NE 0 0 0 0 0 0 0 ENE 0 l 0 0 0 0 l E l 0 0 0 0 0 l ESE 0 0 0 0 0 0 0

SE 0 0 0 0 0 0 0 SSE l 0 0 0 0 0 1 s l 0 0 0 0 0 l SSW 0 0 1 0 0 0 l SW 0 0 0 l 0 0 l WSW 0 l 0 l 0 0 2 w 0 0 l 0 0 0 1 WNW 0 0 l 0 0 0 1 NW 0 0 2 0 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 3 5 7 3 0 0 18 Hours of calm in this stability class:

0 Hours of missing wind measurements in this Hours of missing stability measurements stability class: 0 in all stability classes: 3

Page 95 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DAT A DOCKET NUMBERS: 50-010/50-237/50-249 Licensee: Exelon Nuclear Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Period of Record: April - June 2017

- 150Ft-35Ft Delta-T (F)

Stability Class - Extremely Unstable Winds Measured at 35 Feet Wind Speed (in mph)

Wind 19-24 > 24 Total 1-3 4-7 8-12 13-18 Direction 6 0 0 12 N 0 1 5 1 0 0 5 NNE 0 1 3 5 0 0 14 NE 0 1 8 0 0 0 1 ENE 0 0 1 0 0 0 0 E 0 0 0 0 0 0 3 ESE 0 0 3 3

2 0 0 0 SE 0 1 1 0 0 1 0 0 0 SSE 5 0 0 5 s 0 0 0 4 1 0 8 0 1 2 SSW 6 1 0 14 SW 0 2 5 2 0 0 7 0 0 5 WSW 1 0 0 1 w 0 0 0 1 0 0 4 WNW 0 0 3 1 0 0 7 NW 0 0 6 10 1 0 0 15 NNW 0 4 0 0 0 0 Variable 0 0 0 34 2 0 100 Total 0 11 53 0

Hours of calm in this stability class: stability class: 0 wind measurements in this Hours of missing all stability classes: 0 Hours of missing stability measurements in Page 96 of 139

DRESDEN NUCLEAR POWER STA TJON 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: April - June 2017 Stability Class - Moderately 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 0 1 2 1 0 0 4 NNE 0 1 1 2 0 0 4 NE 0 1 7 1 0 0 9 ENE 0 1 0 0 0 0 1 E 0 0 1 0 0 0 1 ESE 0 3 1 0 0 0 4 SE 0 1 6 0 0 0 7 SSE 0 1 0 1 0 0 2 s 0 1 0 1 0 0 2 SSW 0 3 1 4 1 0 9 SW 0 1 2 1 0 0 4 WSW 0 1 6 5 0 0 12 w 0 1 4 2 0 0 7 WNW 0 1 4 1 0 0 6 NW 0 0 3 0 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 17 38 19 1 0 75 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

Page 97 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through .December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: April - June 2017 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 0 1 0 0 0 0 1 NNE 0 1 1 1 0 0 3 NE 0 3 3 0 0 0 6 ENE 0 1 0 0 0 0 1 E 0 1 2 0 0 0 3 ESE 0 3 2 0 0 0 5 SE 0 0 0 0 0 0 0 SSE 0 1 0 0 0 0 1 s 0 2 2 2 1 0 7 SSW 0 2 4 2 1 0 9 SW 0 5 1 0 0 0 6 WSW 1 0 8 3 0 0 12 w 0 2 7 8 0 0 17 WNW 0 2 4 5 0 0 11 NW 0 1 1 0 0 0 2 NNW 0 1 5 1 0 0 7 Variable 0 0 0 0 0 0 0 Total 1 26 40 22 2 0 91 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 Page 98 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT Janumy through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: April - June 2017 Stability Class - Neutral - 150Ft-35Ft Delta-'l' (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot,11 N 5 12 6 2 0 0 25 NNE 1 6 22 5 4 0 38 NE 2 8 24 14 1 0 49 ENE 1 12 11 1 0 0 25 E 2 16 16 0 0 0 34 ESE 4 9 8 0 0 0 21 SE l 15 15 0 0 0 31 SSE 0 11 11 6 0 0 28 s 0 6 10 14 7 0 37 SSW 7 7 17 18 6 0 55 SW 5 13 8 12 0 0 38 WSW l 10 28 9 2 0 50 w 2 17 25 23 0 0 67 WNW 0 13 32 11 0 0 56 NW 3 3 6 3 0 0 15 NNW 3 l 9 7 0 0 20 Variable 0 0 0 0 0 0 0 Total 37 159 248 125 20 0 589 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

Page 99 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Licensee: Exelon Nuclear Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Period of Record: April - June 2017

- 150Ft-35Ft Delta-T (F)

Stability Class - Slightly Stable Winds Measured at 35 Feet Wind Speed (in mph)

Wind Total 1-3 4-7 8-12 13-18 19-24 > 24 Direction 16 7 0 0 49 N 9 17 19 8 1 0 70 NNE 5 37 41 12 1 1 108 NE 10 43 10 0 0 0 75 ENE 10 55 30 0 0 0 85 E 6 49 17 1 0 0 40 ESE 4 18 SE SSE s

SSW 1

5 4

2 10 17 20 29 8

24 40 37 26 29 1

7 12 0

0 3

0 0

1 0

20 53 103 100 7 6 2 0 41 SW 5 21 22 10 0 0 49 WSW 6 11 15 5 0 0 61 w 5 36 36 3 0 0 59 WNW 3 17 17 1 0 0 30 NW 5 7 11 4 0 0 26 NNW 5 6 0 0 0 0 Variable 0 0 0 350 120 19 2 969 Total 85 393 0

Hours of calm in this stability class: stability class: 0 in this Hours of missing wind measurements stability classes: 0 in all Hours of .missing stability measurements Page 100 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA 50-0 J0/50-237 /50-249 DOCKET NUMBERS:

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: April - June 2017 Stabili-ty 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 3 3 0 0 0 0 6 NNE 4 4 4 0 0 0 12 NE 4 5 0 0 0 0 9 ENE 3 2 0 0 0 0 5 E 1 8 0 0 0 0 9 ESE 6 10 2 0 0 0 18 SE 3 7 3 0 0 0 13 SSE 6 7 0 0 0 0 13 s 3 15 0 0 0 0 18 SSW 3 15 2 0 0 0 20 SW 8 16 0 0 0 0 24 WSW 5 12 1 0 0 0 18 w 13 17 0 0 0 0 30 WNW 7 0 0 0 0 0 7 NW 9 7 0 0 0 0 16 NNW 3 12 0 0 0 0 15 Variable 0 0 0 0 0 0 0 Total 81 140 12 0 0 0 233 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Page 101 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Licensee: Exelon Nuclear Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Period of Record: April - June 2017

- 150Ft-35Ft Delta-T (F)

Stability Class - Extremely Stable Winds Measured at 35 Feet Wind Speed (in mph)

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

0 0 0 2 l 1 0 NNE 0 0 0 0 0 0 0 NE 0 0 l 1 0 0 0 ENE 0 0 0 0 0 0 0 E

0 0 0 5 2 0 ESE 3 0 0 2 0 2 0 0 SE 0 0 6 3 2 l 0 SSE 0 0 3 2 1 0 0 s

0 0 0 12 10 2 0 SSW 0 0 0 27 8 19 0 SW 0 0 0 15 12 3 0 WSW 0 0 0 18 17 1 0 w

0 0 0 9 9 0 0 WNW 0 0 0 8 8 0 0 NW 0 0 0 12 8 4 0 NNW 0 0 0 0 variable 0 0 0 0 0 0 122 84 37 l Total 1

Hours of calm in this stability class: in this stability class: 0 Hours of missing wind measurements stability classes: 0 Hours of missing stability measurements in all Page 102 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT Jarmary through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: April - June 2017 Stability Class - Extremely Unstable - 300Ft-35Ft DeJ.ta-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 D NNE 0 0 0 0 0 0 0 NE 0 0 0 D 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 D 0 0 SSE 0 0 0 D D D 0 s 0 D 0 0 0 D 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 D 0 D 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 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

Page 103 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period o'f Record: April - June 2017 Stability Class - Moderately Unstable - 300Ft-35Ft Delta-'!' (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 1 4 NNE 0 0 0 1 2 0 3 NE 0 0 0 6 2 0 8 ENE 0 0 0 2 0 0 2 E 0 0 0 0 0 0 0 ESE 0 0 3 0 0 0 3 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 0 3 0 3 SSW 0 0 1 1 0 0 2 SW 0 0 0 3 1 2 6 WSW 0 0 0 1 1 0 2 w 0 0 0 0 0 0 0 WNW 0 0 0 1 1 0 2 NW 0 0 1 1 0 0 2 NNW 0 0 4 4 1 0 9 Variable 0 0 0 0 0 0 0 Total 0 0 9 24 11 3 47 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 Page 104 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 J7 METEOROLOGICAL DA TA DOCKETNUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: April - June 2017 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 1 4 1 4 0 10 NNE 0 1 2 2 1 0 6 NE 0 0 4 13 2 0 19 ENE 0 0 0 1 0 0 1 E 0 1 1 2 0 0 4 ESE 0 1 4 2 0 0 7 SE 0 0 3 2 0 0 5 SSE 0 1 0 0 2 0 3 s 0 1 0 1 2 0 4 SSW 0 0 3 5 3 1 12 SW 0 2 1 3 5 2 13 WSW 0 0 2 12 6 1 21 w 0 1 2 9 6 0 18 WNW 0 0 1 9 6 0 16 NW 0 0 2 2 0 0 4 NNW 0 0 5 4 1 0 10 Variable 0 0 0 0 0 0 0 Total 0 9 34 68 38 4 153 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

Page 105 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: April - June 2017 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 1 9 9 5 4 4 32 NNE 2 8 14 15 11 6 56 NE 0 9 19 46 35 6 115 ENE 1 14 37 26 3 0 81 E 1 15 17 31 6 0 70 ESE 2 11 17 12 2 0 44 SE 0 7 16 9 0 0 32 SSE 1 5 16 6 5 2 35 s 1 7 9 13 20 15 65 SSW 3 . 6 6 24 18 19 76 SW 3 15 10 11 9 9 57 WSW 3 9 16 29 20 9 86 w 1 5 18 28 26 5 83 WNW 2 6 25 48 24 6 111 NW 0 5 8 12 6 0 31 NNW 1 4 3 17 6 5 36 Variable 0 0 0 0 0 0 0 Total 22 135 240 332 195 86 1010 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 Page 106 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units l ,2,3 Licensee: Exe.Ion Nuclear Dresden Generating Station Period of Record: April - June 2017 Stability Class - S1ightly 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 5 8 4. 0 18 NNE 1 7 11 22 4 0 45 NE 1 5 18 27 0 2 53 ENE 2 20 21 6 0 0 49 E 1 10 14 18 0 0 43 ESE 0 5 15 12 8 0 40

s SSW SE SSE 0

0 0

0 4 3

5 3 17 17 9

3 13 13 24 44 15 23 33 5

22 14 0

0 112 30 36 89 SW 0 6 10 26 4 2 48 WSW 0 5 10 13 6 0 34 w 0 1 17 26 0 0 44 WNW 0 3 5 26 4 0 38 NW 1 2 5 17 0 0 25 NNW 0 5 5 9 1 0 20 Variable 0 0 0 0 0 0 0 Total 6 85 182 304 107 40 724 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

Page 107 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: April - June 2017 Stability Class - Moderately Stable - 300F't-35Ft Delta-'!' (F)

Winds Measured at 300 Feet Wind Speed (in mph)

Wind 1-3 4-7 8-12 13-18 19-24 > 24 Total Direction 1 3 2 4 0 D 10 N

4 2 1 0 0 7 NNE 0 2 1 3 0 0 6 NE 0 1 3 1 0 0 0 5 ENE 0 5 2 4 1 0 12 E

0 1 1 2 1 0 5 ESE 1 2 6 6 2 0 17 SE 0 4 7 2 0 0 13 SSE 4 1 4 2 0 11 s 0 1 3 1 3 1 0 9 SSW 2 0 5 9 1 0 17 SW 1 4 9 11 0 0 25 WSW 0 4 11 18 0 0 33 w

1 3 9 7 0 0 20 WNW 0 1 4 1 0 0 6 NW 2 5 4 0 0 13 NNW 2 0 0 0 0 0 0 0 Variable 10 45 67 79 8 0 209 Total Hours of calm in this stability class: 0 0

Hours of missing wind measurements in this stability class:

stability measurements in all stability classes: 0 Hours of missing Page 108 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facmty: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: April - June 2017 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 1 0 0 1 NNE 0 2 1 0 0 0 3 NE 1 2 0 0 0 0 3 ENE 1 1 0 0 0 0 2 E 0 2 0 0 0 0 2 ESE 1 1 0 0 0 0 2

SSW SE SSE s

0 0

1 1

0 0 1 1

0 0

0 0 0 0

0 0 1 0

1 2

SW 1 1 0 2 0 0 4 WSW 0 1 1 1 0 0 3 w 1 2 1 5 0 0 9 WNW 0 1 2 0 0 0 3 NW 0 0 2 0 0 0 2 NNW 0 0 3 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 5 15 12 9 0 0 41 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi 1i ty class:

0 Hours of missing stability measurements in all stability classes:

0

Page 109 of 139

DRESDEN NUCLEAR' POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: July - September 2017 Stability Class - Extremely Unstable - 150Ft-35Ft Delta-'.!' (F)

Winds Measured at 35 Feet Wind Speed (in mph)

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

0 0 2 0 0 0 2 NNE 0 0 10 0 0 0 10 NE 0 1 3 0 0 0 4 ENE 0 5 3 0 0 0 8 E

2 3 0 0 0 5 ESE 0 2 0 0 0 0 2 SE 0 1 2 0 0 0 3 SSE 0 0 3 0 0 0 3 s 0 1 5 0 0 0 6 SSW 0 0 4 0 0 0 4 SW 0 1 1 1 0 0 3 WSW 0 1 1 0 0 0 2 w 0 0 2 1 0 0 3 WNW 0 0 0 0 1 0 0 1 NW 3 8 0 0 0 11 NNW 0 0 0 0 0 0 0 Variable 0 0 17 54 3 0 0 74 Total Hours of calm in this stability class: 0 wind measurements in this stability class: 0 Hours of missing 3 all stability classes:

Hours of missing stability .measurements in Page 110 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: cTuly - September 2017 Stability Class - Moderately 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 0 0 4 0 0 0 4 NNE 0 0 6 0 0 0 6 NE 0 1 5 0 0 0 6 ENE 0 0 2 0 0 0 2 E 0 2 0 0 0 0 2 ESE 1 2 1 0 0 0 4 SE 0 2 0 0 0 0 2 SSE 0 3 2 0 0 0 5 s 0 5 2 1 0 0 8 SSW 0 0 5 0 0 0 5 SW 0 1 2 2 0 0 5 WSW 0 4 4 2 0 0 10 w 0 1 4 0 0 0 5 WNW 0 2 3 0 0 0 5 NW 0 1 5 1 0 0 7 NNW 0 3 7 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 1 27 52 6 0 0 86 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

Page 111 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: J1:1ly - September 2017 Stability Class - Slightly Unstable - 15DFt-35Ft Delta-T (P)

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 6 1 1 0 0 8 NNE 0 5 1 3 D 0 9 NE 0 3 3 0 0 0 6 ENE 0 4 0 0 0 0 4 E D 2 0 0 0 0 2 ESE 0 3 0 0 0 0 3 SE 0 1 2 0 0 0 3 SSE 1 4 3 0 0 0 8 s 1 2 1 1 0 0 5 SSW 0 2 4 0 D 0 6 SW 0 3 1 0 0 0 4 WSW 0 7 2 0 0 0 9 w 0 5 3 D 0 D 8 WNW 0 6 5 1 0 0 12 NW D 5 6 0 0 0 11 NNW D 3 4 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 2 61 36 6 0 0 105 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: D Hours of missing stability measurements in all stability classes: 3 Page 112 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 20 l 7 METEOROLOGICAL DATA

DOCKET NUMBERS:

FaciJity: Dresden Nuclear Power Station Units 1,2,3 50-010/50-237/50-249 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: July - September 2017 Stability Class - Neutral - 150Ft-35Ft De1ta-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 13 4 0 0 0 20 NNE 7 17 12 2 0 0 38 NE 4 19 17 1 0 0 41 ENE 2 20 1 0 0 0 23 E 4 15 2 0 0 0 21 ESE 5 23 3 0 0 0 31

s SE SSE SSW 5

4 3

5 17 25 24 21 6

16 11 20 3

1 2

0 0

0 31 46 40 46 SW 4 15 7 4 0 0 30 WSW 5 27 5 1 0 0 38 w 6 26 21 5 0 0 58 WNW 4 17 23 0 0 0 44 NW 3 15 17 3 0 0 38 NNW 4 25 12 2 0 0 43 Variable 0 0 0 0 0 0 0 Total 68 319 177 24 0 0 588 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

Page 113 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS:

Facility: Dresden Nuclear Power Station Units 1,2,3 50-010/50-237 /50-249 Licensee: Exelon Nuclear

Dresden Generating Station Period of Record: July - September 2017 Stability Class - Slightly Stable - 150Ft-35Ft Delta-'.!' (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 12 5 0 0 0 24 NNE 5 30 14 1 0 0 50 NE 7 56 11 0 0 0 74 ENE 13 55 2 0 0 0 70 E 8 49 2 0 0 0 59 6 41 0 0 0 0 47 ESE SE 10 36 22 0 0 0 68 SSE 8 35 10 0 0 0 53 s 14 21 23 0 0 0 58 SSW 8 14 13 1 0 0 36 SW 8 13 3 0 0 0 24 WSW 5 16 8 0 0 0 29 w 10 27 17 0 0 0 54 WNW 9 28 8 0 0 0 45 NW 19 29 14 0 0 0 62 NNW 5 30 13 0 0 0 48 Variable 0 0 0 0 0 0 0 Total 142 492 165 2 0 0 801 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 114 of 139

DRESDEN NUCLEAR POWER, STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: July - September 2017 Stability Class - Moderately Stable - 150Ft-35Ft Delta-'!' (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 10 5 0 0 0 0 15 NNE 7 17 0 0 0 0 24 NE 6 5 0 0 0 0 11 ENE 4 1 0 0 0 0 5 E 6 4 0 0 0 0 10 ESE 9 16 1 0 0 0 26

SE SSE s

SSW 10 11 20 18 23 20 13 7

10 0

0 0

43 31 33 25 SW 13 28 0 0 0 0 41 WSW 9 5 1 0 0 0 15 w 13 6 0 0 0 0 19 WNW 14 10 0 0 0 0 24 NW 26 16 0 0 0 0 42 NNW 14 14 0 0 0 0 28 Variable 0 0 0 0 0 0 0 Total 190 190 12 0 0 0 392 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 0 Hours .of missing stability measurements in all stability classes: 3

Page 115 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKETNUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

Dresden Generating Station Period of .Record: July - September 2017 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

J 0 0 0 0 0 5 NNE 1 0 0 0 0 0 1 NE 2 0 0 0 0 0 2 ENE 1 0 0 0 0 0 1 E 0 0 0 0 0 0 0 ESE 3 5 0 0 0 0 8 SE SSE s

SSW 1

7 11 4 2 3

1 1

2 0

0 0

0 0 12 8

4 8

SW 24 16 0 0 0 0 40 WSW 7 1 0 0 0 0 8 w 5 0 0 0 0 0 5 WNW 11 0 0 0 0 0 11 NW 15 0 0 0 0 0 15 NNW 16 2 0 0 0 0 18 Variable 0 0 0 0 0 0 0 Total 113 31 2 0 0 0 146 Hours of calm in this stability class: 7 Hours of missing wind measurements in this stability class: 0 Hours of missing stabi1ity measurements in all stability classes: 3 Page 116 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-0] 0/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: JuJ.y - September 2017 Stability Class - Extremely Unstable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mph)

W:ind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 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 0 0 0 2 0 0 2

SE SSE s

SSW 0

0 0

0 1

1 0

0 0

0 1

1 0

0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 2 0 2 0 0 4 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

Page 117 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: July - September 2017

.Stability Class - ModerateJ.y 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 4 0 0 4 NNE 0 0 0 0 0 0 0 NE 0 0 1 4 0 0 5 ENE 0 0 2 0 0 0 2 E 0 0 5 0 0 0 5 ESE 0 0 1 1 0 0 2 SE SSE s

SSW 0

0 0

1 1

0 0

0 1

1 0

0 0

1 2

1 SW 0 0 0 3 0 0 3 WSW 0 0 1 0 0 0 1 w 0 0 0 0 0 0 0 WNW 0 0 0 1 0 0 1 NW 0 0 0 3 0 0 3 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 2 11 19 0 0 32 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 Page 118 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: Jttly - September 2017 Stability Class - Slightly Unstable - 300Ft-35Ft DeJ.ta-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 6 2 0 0 9 NNE 0 1 1 6 0 0 8 NE 0 0 4 5 0 0 9 ENE 0 2 6 4 0 0 12 E 0 0 4 0 0 0 4 ESE 0 3 2 1 0 0 6

SE SSE s

SSW 0

0 0

0 2

3 2

0 10 1

3 4

0 0

1 2

0 0

3 6

7 12 SW 0 0 1 1 0 0 2 WSW 0 4 4 2 4 0 14 w 0 4 1 3 0 0 8 WNW 0 6 2 3 0 0 11 NW 0 1 5 3 2 0 11 NNW 0 3 11 6 0 0 20 Variable 0 0 0 0 0 0 0 Total 0 32 65 39 6 0 142 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of miss.ing stability measurements in all stability classes: 3

Page 119 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: July - September 2017 Stability Class - Neutral - 300Ft-35Ft De1ta-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 17 8 4 0 0 30 NNE 6 14 5 8 0 0 33 NE 4 21 16 23 3 0 67 ENE 2 19 24 8 0 0 53 E 3 13 13 2 0 0 31 ESE 0 20 9 3 0 0 32 SE SSE s

SSW 3

3 5

4 17 23 22 15 38 23 25 8 3 8

5 15 0

1 2

1 0

0 0

0 31 73 57 60 SW 5 14 16 11 2 0 48 WSW 4 24 20 7 1 0 56 w 4 18 17 16 10 0 65 WNW 3 20 31 20 2 0 76 NW 2 10 18 24 4 0 58 NNW 1 13 23 17 1 0 55 Variable 0 0 0 0 0 0 0 Total 50 280 294 174 27 0 825 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 Page 120 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: July - September 2017 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 10 5 13 0 0 28 NNE 1 10 15 17 1 0 44 NE 1 5 27 35 3 0 71 ENE 1 28 39 7 0 0 75 E 1 13 26 13 0 0 53 ESE 0 13 24 23 1 0 61 SE 2 6 19 35 4 0 66 SSE 2 13 20 32 0 0 67 s 1 9 24 14 2 0 50 SSW 1 9 17 16 7 0 50 SW 1 7 12 13 2 1 36 WSW 2 9 6 12 0 0 29 w 4 7 13 21 2 0 47 WNW 3 6 15 9 2 0 35 NW 0 8 19 25 1 0 53 NNW 1 5 13 15 0 0 34 Variable 0 0 0 0 0 0 0 Total 21 158 294 300 25 1 799 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

Page 121 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKETNUMBERS: 50-010/50-237/50-249 Licensee: Exelon Nuclear Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Period of Record: July - September 2017 Stability Class - Moderately Stable ** 300Ft-35Ft Delta-T (Fl Winds Measured at 300 Feet Wind Speed (in mph)

Wind Total 4-7 8-12 13-18 19-24 > 24 Direction 1-3 4 9 0 0 14 N 0 1 4 4 2 0 0 10 NNE 0 10 10 0 0 24 NE 0 4 1 6 1 0 0 10 ENE 2 3 1 0 0 11 E 2 5 2 1 7 0 0 10 ESE 0 6 7 2 0 20 SE 0 5 9 17 2 0 35 SSE 2 5 17 16 0 0 35 s 1 1 3 15 10 4 0 32 SSW 0 14 10 1 0 28 SW 2 1 5 10 13 0 1 29 WSW 0 10 3 0 0 17 w 1 3 4 9 2 2 0 18 WNW 1 11 10 0 0 21 NW 0 0 7 7 0 0 18 NNW 1 3 0 0 0 0 0 0 Variable 0 47 136 125 11 1 332 Total 12 1

Hours of calm in this stability class: 0 stability class:

Hours of missing wind measurements in this stability classes: 3 missing stability measurements in all Hours of Page 122 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-0 l 0/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: July - September 2017 Stability Class - Extremely Stable - 300Ft-35Ft Delta-T (F)

Winds Measured at 300 Feet Wind Speed (in mp.h)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 2 NNE 0 1 2 2 0 0 5 NE 0 1 5 0 0 0 6 ENE 0 3 0 0 0 0 3 E 2 1 0 0 0 0 3 ESE 0 1 0 0 0 0 1 SE 0 0 0 2 0 0 2 SSE 2 0 1 1 0 0 4 s 0 0 4 0 0 0 4 SSW 0 0 0 0 2 0 2 SW 0 0 0 5 0 0 5 WSW 1 0 1 2 0 0 4 w 0 1 5 5 0 0 11 WNW 0 3 4 0 0 0 7 NW 0 3 4 0 0 0 7 NNW 0 2 2 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 5 18 28 17 2 0 70 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

Page 123 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: October - December2017 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 0 0 0 0 0 0 0 NNE 0 0 0 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 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE s

SSW SW 0

0 0

1 0

0 1

1 0

0 0

0 1

2 0

0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 1 2 0 0 3 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 Page 124 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: October - December2017 Stability Class - Moderately Unstable - 150Ft-35Ft Delta-'I' (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 0 0 0 0 0 NNE 0 0 0 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 0 0 0 0 0 0 0 SE 0 2 1 0 0 0 3 SSE 0 0 3 1 0 0 4 s 0 0 1 1 0 0 2 SSW 0 0 0 0 0 0 0 SW 0 0 0 2 0 0 2 WSW 0 0 1 0 0 0 1 w 0 0 0 0 0 0 0 WNW 0 0 1 1 0 0 2 NW 0 0 0 1 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 2 7 6 0 0 15 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

Page I 25 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTJVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-0 l 0/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: October - December2017 Stability Class - Sligl1tly Dnste1ble - 150Ft-35Ft DeJ.ta-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 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 1 0 0 0 1 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 1 0 0 0 0 1 SSE 0 0 2 0 0 0 2 s 0 0 2 2 0 0 4 SSW 0 1 0 1 1 0 3 SW 0 0 2 1 0 0 3 WSW 0 0 4 1 0 0 5 w 0 0 3 1 0 0 4 WNW 0 0 1 4 0 0 5 NW 0 0 4 5 0 0 9 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 2 19 15 1 0 37 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 Page 126 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: October - December2017 Stabi1ity Class - Neutral - 150F't-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 10 7 1 0 0 19 NNE 0 9 14 1 0 0 24 NE 1 11 9 1 0 0 22 ENE 2 9 1 0 0 0 12 E 3 8 3 0 0 0 14 ESE 1 5 8 0 0 0 14 SE 3 3 7 2 0 0 15 SSE 1 6 19 10 0 0 36 s 1 9 21 16 5 1 53 SSW 1 7 14 10 3 0 35 SW 2 6 5 7 1 0 21 WSW 1 10 14 8 0 0 33 w 0 14 27 18 6 0 65 WNW 2 5 29 13 0 0 49 NW 0 3 8 13 1 0 25 NNW 0 11 11 3 2 0 27 Variable 0 0 0 0 0 0 0 Total 19 126 197 103 18 1 464 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 Page 127 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADiOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA 50-0 l 0/50-237/50-249 DOCKET NUMBERS:

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: October - December2017 Stability Class - Slightly Stable - 150Ft-35Ft Delt:a-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 4 30 28 4 0 0 66 NNE 2 13 14 1 0 0 30 NE 7 33 13 2 0 0 55 ENE 7 28 4 0 0 0 39 E 6 25 8 1 0 0 40 ESE 6 9 8 2 0 0 25 SE 2 22 29 3 1 0 57 SSE 6 58 55 22 1 0 142 s 5 38 47 37 9 4 140 SSW 3 28 41 13 2 0 87 SW 4 30 33 4 0 0 71 WSW 4 12 23 17 1 0 57 w 6 27 87 25 4 0 149 WNW 6 41 59 19 0 0 125 NW 9 35 52 22 5 0 123 NNW 8 50 29 17 1 0 105 Variable 0 0 0 0 0 0 0 Total 85 479 530 189 24 4 1311 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 128 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Dresden Generating Station Licensee: Exelon Nuclear Period of Record: October - December2017 Stability Class - Moderately Stable - 150Ft-35F't 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 0 0 0 0 0 3 NNE 0 l 0 0 0 0 1 NE 2 0 0 0 0 0 2 ENE 1 0 0 0 0 0 1 E 5 4 0 0 0 0 9 ESE 4 12 4 0 0 0 20 SE 6 15 3 0 0 0 24 SSE 6 12 1 0 0 0 19 s 10 28 5 0 0 0 43 SSW 12 29 2 0 0 0 43 SW 8 14 8 0 0 0 30 WSW 4 5 0 0 0 0 9 w 7 9 0 0 0 0 16 WNW 12 21 1 0 0 0 34 NW 12 16 1 0 0 0 29 NNW 3 6 0 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 95 172 25 0 0 0 292 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

Page 129 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period o:E Record: October - Decernber2017 Stability Class - Extremely St;;1ble - 150Ft-35Ft Delta-'l' (Fl Winds Measured at 35 Feet Wind Speed (in mph)

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

NNE 1 0 0 0 0 0 1 1 0 0 0 0 0 1 NE ENE 4 0 0 0 0 0 4 7 0 0 0 0 0 7 E

0 4 0 0 0 0 4 ESE 0 1 0 0 0 0 1 SE 2 0 0 0 0 0 2 SSE 1 0 0 0 0 3 s 2 10 4 0 0 0 0 14 SSW 10 8 0 0 0 0 18 SW 2 0 0 0 0 0 2 WSW w 1 0 0 0 0 0 1 WNW 6 0 0 0 0 0 6 6 3 0 0 0 0 9 NW NNW 0 5 0 0 0 0 5 0 0 0 0 0 0 0 variable 53 26 1 0 0 0 80 Total Hours of calm in this stability class: 2 0

Hours of missing wind measurements in this stability class:

missing stability measurements in all stability classes: 3 Hours of Page 130 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-0) 0/50-237/50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: October - December2017 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 0 0 0 0 0 NNE 0 0 0 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 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 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 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

Page 131 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units l ,2,3 Licensee: Exelon Nuclear

Dresden Generating Station Period of Record: October - December2017 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 0 0 0 0 0 NNE 0 0 0 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 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 1 0 0 1 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 1 0 0 1 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 Page 132 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DATA DOCKET NUMBERS: 50-0 l0/50-237 /50-249

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: October - December2017 Stability Class - Slightly UnstabJ.e - 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 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 0 1 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 2 0 1 0 0 3 SSE 0 0 0 3 1 0 4 s 0 0 0 4 1 0 5 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 2 0 2 WSW 0 0 0 5 1 0 6 w 0 0 2 3 4 1 10 WNW 0 0 4 7 1 0 12 NW 0 0 3 6 4 0 13 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 3 10 29 14 1 57 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

Page 133 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear

Dresden Generating Station Period of Record: October - December2017 Stability Class - Neutral - 300Ft-35Ft Delta-'!' (Fl 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 13 24 21 2 4 64 NNE 0 7 18 21 3 0 49 NE 0 7 22 20 6 0 55 ENE 1 12 28 4 0 0 45 E 3 8 24 6 1 0 42 ESE 2 6 9 7 4 0 28 SE 0 5 8 11 1 0 25 SSE 0 7 26 29 13 2 77 s 0 8 18 44 17 25 112 SSW 0 12 14 26 18 6 76 SW 3 10 13 18 11 10 65 WSW 2 9 19 19 18 5 72 w 1 15 17 47 30 15 125 WNW 0 10 20 71 45 9 155 NW 0 6 25 39 34 8 112 NNW 0 6 28 32 18 13 97 Variable 0 0 0 0 0 0 0 Total 12 141 313 415 221 97 1199 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 Page 134 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DAT A 50-010/50-237/50-249 DOCKET NUMBERS:

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: October - December2017 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 8 10 17 0 0 35 NNE 2 6 7 10 0 0 25 NE 0 2 4 3 0 0 9 ENE 1 2 2 2 0 0 7 E 1 7 2 6 0 0 16 ESE 2 7 5 7 l 0 22 SE 0 9 7 14 4 0 34 SSE 0 5 23 28 14 1 71 s l 8 17 26 33 14 99 SSW 0 5 15 32 21 9 82 SW 1 8 15 43 20 l 88 WSW 0 6 8 21 5 l 41 w 2 3 10 24 14 2 55 WNW 0 4 10 27 8 0 49 NW l 7 6 29 5 0 48 NNW 0 3 13 21 0 0 37 Variable 0 0 0 0 0 0 0 Total 11 90 154 310 125 28 718 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

Page 135 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA 50-010/50-237/50-249 DOCKET NlJMBERS:

Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Period of Record: October -* December2017 Stability Class - Moderately Stable - 300Ft-35Ft Delta-'l' (F)

Winds Measured at 300 Feet Wind Speed (in mph)

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

NNE 0 0 2 2 0 0 4 NE 0 0 0 1 0 0 1 ENE 1 0 0 0 0 0 1 E 0 1 0 0 0 0 1 ESE 0 2 0 0 3 0 5 SE 0 1 2 7 3 0 13 1 1 7 5 0 0 14 SSE 4 9 1 0 14 s 0 0 SSW 0 1 3 7 9 0 20 0 4 10 17 0 0 31 SW WSW 0 2 6 9 0 0 17 w 1 1 7 3 0 0 12 WNW 1 1 2 2 0 0 6 NW 0 1 4 3 1 0 9 0 2 5 5 0 0 12 NNW Variable 0 0 0 0 0 0 0 Total 4 17 53 74 17 0 165 Hours of calm in this stability class: 0 of missing wind measurements in *this stability class: 0 Hours in all stability classes: 3 Hours of missing stability measurements Page 136 of 139

DRESDEN NUCLEAR POWER STATION 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT January through December 2017 METEOROLOGICAL DA TA DOCKET NUMBERS: 50-010/50-237/50-249 Facility: Dresden Nuclear Power Station Units 1,2,3 Licensee: Exelon Nuclear Dresden Generating Station Per:iod of T<ecord: October - Decembe.r2 017 Stability Class - Extremely Stable - 300Pt:-35Ft Delt,1-1' (Io')

Winds Measured at 300 Peet Wind Speed (in mph}

Wind D:irect:ion 1-3 4-7 8-] 2 13-18 19-24 > 24 Total N 0 0 7 0 0 0 7 NNE 0 0 1 0 0 0 1 NE 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 1 1 0 0 0 0 2 ESE 0 1 0 0 0 0 1 SE 0 3 0 0 0 0 3 SSE 0 2 0 0 0 0 2 s 0 4 0 0 0 0 4 SSW 1 2 0 4 2 0 9 SW 2 1 2 9 2 0 16 WSW 0 0 2 1 0 0 3 w 2 3 1 2 0 0 8 WNW 1 0 1 1 0 0 3 NW 0 1 1 0 0 0 2 NNW 1 2 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 9 20 15 17 4 0 65 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 stabi.1.i ty classes: 3

Page I 37 of 139

_J I

Attachment 1 Dresden Station Offsite Dose Calculation Manual

Revision 13

Page 138 of 139

SVPLTR 18-0020, Corrected 2017 Radioactive Effluent Release Report

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