Text

Three Miles Island, Units 1 and 2, Combined 2017 Annual Radioactive Effluent Release Report
	ML18121A153
Person / Time
Site:	Three Mile Island
Issue date:	04/30/2018
From:	Dullinger J; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	TMl-18-025
	Download: ML18121A153 (53)
	v • d • e

l' Exelon *Generationill April 30, 2018 TMl-18-025 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 THREE MILE ISLAND NUCLEAR STATION UNIT 1 AND UNIT 2 RENEWED OPERATING LICENSE NO. DPR-50 AND POSSESSION ONLY LICENSE NO. DPR 73 DOCKET NOS. 50-289 AND 50-320

SUBJECT:

COMBINED 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT The 2017 Annual Radioactive Effluent Release Reports required by TMl-1 Technical Specification 6.9.4.1, TMl-2 Technical Specifications 6.8.1.2, and 6.12, and the Off-Site Dose Calculation Manual Part 4, Section 2.1, is enclosed. contains a summary of the quantities of radioactive liquid and gaseous effluents released from the site as outlined in Reg. Guide 1.21, Rev. 1, with data summarized on a quarterly basis following the format of Appendix B thereof. contains information for each type of solid waste shipped offsite during the report period including the container volume, total curie quantity, principal radionuclides and type of waste. includes a summary of unplanned releases from the site to unrestricted areas of radioa.ctive materials in gaseous and liquid effluents made during the reporting period. describes any changes made during 2017 to the Process Control Program (PCP) documents or to the Offsite Dose Calculation Manual (ODCM) and a listing of new locations for dose calculations and/or environmental monitoring identified by the land use census pursuant to Part 3, Section 8.2, of the ODCM. reports all instrumentation not returned to operable status within 30 days per the TMI ODCM Part 1, Sections 2.1.1.b and 2.1.2.b, and Part 2, Section 2.1.2.b.

2017 Annual Radioactive Effluent Release Report for TMI Page 2 of 3 TMl-18-025 is quarterly summaries of hourly meteorological data collected for 2017 in the form of joint frequency distribution of wind speed, wind direction and atmospheric stability. is an assessment of the radiation doses due to the radioactive liquid and gaseous effluents released from the respective unit during 2017. is an assessment of the radiation doses from the radioactive liquid and gaseous effluents to members of the public due to their activities inside the site boundary during 2017. is an assessment of the radiation doses to the most likely exposed real individual from reactor releases and other nearby uranium fuel cycle sources including doses from primary effluent pathways and direct radiation for 2017. 0 is a summation of deviations from the sampling and analysis regime specified in the ODCM for TMl-1 and TMl-2. 1 is a summary of Major Changes to Radioactive Waste Treatment Systems IAW FSAR Section 11.2.6. is a copy of the "TMI Offsite Dose Calculation Manual (ODCM)", CY-TM-170-300, Revision 5, which was approved during 2017 and issued on December 8, 2017. There was one revision made to the ODCM during 2017.

2017 Annual Radioactive Effluent Release Report for TMI Page 3 of 3 TMl-18-025 is a copy of the TMI Process Control Program, RW-AA-100 Revision 12, which was issued on September 30, 2017.

Please contact Dani Brookhart at 717-948-8017 if you have any questions concerning this report.

Respectfully,

~~

Joseph A. Dullinger Plant Manager (acting), Three Mile Island Unit 1 Exelon Generation Co., LLC JAD/DLB/dam Attachments/Enclosures cc: Regional Administrator, NRC Region I NRC Senior Resident Inspector-Three Mile Island Nuclear Station, Unit 1 NRC Project Manager, NRR -Three Mile Island Nuclear Station, Unit 1 NRC Project Manager, NRR -Three Mile Island Nuclear Station, Unit 2 R. R. Janati, Commonwealth of Pennsylvania S. L. Martin, PA Department of Environmental Protection, Bureau of Radiation Protection GPU Nuclear Cognizant Officer

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 17 Summary of Radioactive Liquid and Gaseous Effluents Released from TMI during 2017 0

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 17 TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES TMl-1 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. FISSION AND ACTIVATION GASES

1. Total Release Ci 5.31 E-01 1.98E-01 1.13E+01 7.06E+01 25%

2. Avg release rate for period µCi/S 6.83E-02 2.52E-02 1.42E+OO 8.BBE-02

3. Percent of aoolicable limit % * * *

B. IODINES

1. Total Iodine 1131 Ci <LLD <LLD 2.68E-05 5.37E-05 25%

2. Ava Release Rate for Period µCi/S N/A N/A 3.37E-06 6.75E-06

3. Percent of aoolicable limit % * * *

C. PARTICULATES

1. Part With half-life >8 davs Ci <LLD <LLD <LLD <LLD 25%

2. Ava Release Rate for Period µCi/S N/A N/A N/A N/A

3. Percent of aoolicable limit % * * *

D. TRITIUM

1. Total Release Ci 2.04E+01 1.69E+01 2.58E+01 3.68E+01 15%

2. Ava Release Rate for Period µCi/S 2.62E+OO 2.15E+OO 3.25E+OO 4.63E+OO

3. Percent of aoolicable limit % * * *

E. GROSS ALPHA

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

2. Avg release rate for period µCi/S N/A N/A NIA N/A

3. Percent of aoolicable limit uCi/S * * *

F. CARBON14

1. Total Release Ci 2.23E+OO 2.18E+OO 1.47E+OO 2.47E+OO **

2. Ava release rate for oeriod uCi/S 2.86E-01 2.77E-01 1.85E-01 3.11E-01

3. Percent of aoolicable limit µCi/S * * *

Note: Table 3 contains a listing of TMI ODCM Lower L1m1t of Detection (LLD)

ODCM Limits - Listed on Dose Summary Table

- C-14 production was estimated using EPRI Technical Report 1021106 Methodology.

2017Annual Radioactive Effluent Release Report for TMI Page 3 of 17 TABLE 18 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT GASEOUS EFFLUENTS - GROUND-LEVEL RELEASES - BATCH MODE TMl-1 Fission And Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Gasses Ar-41 Ci <LLD <LLD 1.38E-03 <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD 3.78E-03 <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A 5.16E-03 N/A Radioiodines Units Quarter 1 Quarter2 Quarter3 Quarter4 1-131 Ci <LLD <LLD <LLD <LLD 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Particulates Units Quarter 1 Quarter2 Quarter3 Quarter4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter2 Quarter3 Quarter4 H3 Ci 3.40E-05 <LLD 4.04E-03 <LLD Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD}.

2017Annual Radioactive Effluent Release Report for TMI Page 4 of 17 TABLE 18 (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - GROUND-LEVEL RELEASES -

CONTINUOUS MODE TMl-1 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Gasses Ar-41 Ci <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter4 1-131 Ci <LLD <LLD 1.89E-06 1.16E-07 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD 6.51E-07 <LLD Total Ci N/A N/A 2.54E-06 1.16E-07 Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Ni-63 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Nb-95 Ci -;:LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter4 H3 Ci 2.75E-04 1.49E-02 3.76E+OO 6.45E-02 Carbon 14 Units Quarter 1 Quarter 2 Quarter 3 Quarter4 C-14 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017Annual Radioactive Effluent Release Report for TMI Page 5 of 17 TABLE 1D EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE Fission And Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Gasses Ar-41 Ci <LLD 3.45E-03 1.55E-OO 1.36E-02 Kr-85 Ci 4.93E-01 1.77E-01 2.04E-01 1.27E-01 Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-131m Ci 5.80E-03 1.19E-03 1.94E-03 5.17E-03 Xe-133 Ci 3.17E-02 1.57E-03 9.29E-OO 5.60E-01 Xe-133m Ci <LLD <LLD 3.98E-02 3.68E-05 Xe-135 Ci <LLD <LLD 1.67E-01 7.43E-06 Xe-135m Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci 5.31 E-01 1.98E-01 1.21 E+01 7.06E-01 Radioiodines Units Quarter 1 Quarter2 Quarter3 Quarter4 1-131 Ci <LLD <LLD 4.08E-06 4.88E-01 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A 4.08E-06 4.88E-01 Particulates Units Quarter 1 Quarter2 Quarter3 Quarter4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter2 Quarter3 Quarter4 H3 Ci 8.48E-04 2.26E-02 9.40E+OO 6.54E-01 Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release Report for TMI - Page 6 of 17 TABLE 1D (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES

CONTINUOUS MODE TMl-1 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Gasses Ar-41 Ci <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci NIA NIA NIA NIA Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 1-131 Ci <LLD <LLD 2.02E-05 4.74E-06 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD Total Ci NIA NIA 2.02E-05 -4.74E-06 Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Ni-63 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci NIA NIA NIA NIA Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter4 H3 Ci 2.04E+01 1.69E+01 1.26E+01 3.61E+01 Carbon 14 Units Quarter 1 Quarter 2 Quarter 3 Quarter4 C-14 Ci 2.23E+OO 2.18E+OO 1.47E+OO 2.47E+OO Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017Annual Radioactive Effluent Release ReportforTMI Page 7 of 17 TABLE 2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES TMl-1 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. Fission and Activation Products

1. Total Release(Not incl.

Tritium,gases,alpha) Ci 5.05E-05 6.70E-05 1.36E-04 2.19E-04 25%

2. Avq diluted concentration durinq period uCi/ml 7.79E-12 1.10E-11 1.97E-11 3.26E-11

3. Percent of aoolicable limit % * * *

B. Tritium

1. Total Release Ci 1.33E+02 7.45E+01 7.95E+01 5.29E+01 25%

2. Avq diluted concentration durinq period uCi/ml 2.05E-05 1.23E-05 1.15E-05 7.88E-06 1.30E-05

3. Percent of applicable limit % * * *

C. Dissolved and Entrained Gases

1. Total Release Ci 2.17E-05 1.42E-05 2.40E-05 <LLD 15%

2. Avo. diluted concentration durinP. period uCi/ml 3.34E-12 2.33E-12 3.47E-12 O.OOE+OO 2.28E-12

3. Period of applicable limit % * * *

D. Gross Aloha Activitv

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

E. VOLUME OF WASTE RELEASE LITERS 9.44E+07 9.79E+07 1.04E+08 1.07E+08 10%

(PRIOR TO DILUTION F. VOLUME OF DILUTION WATER USED LITERS 6.49E+09 6.08E+09 6.91 E+09 6.71E+09 10%

2017 Annual Radioactive Effluent Release ReportforTMI - Page 8 of 17 TABLE 28 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - BATCH MODE TMla1 Fission and Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Products H-3 Ci 1.33E+02 7.45E+01 7.94E+01 5.28E+01 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci 8.90E-07 <LLD <LLD 3.09e-06 Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci 2.47E-05 5.42E-06 7.23E-05 5.42E-05 Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD 1.34E-06 Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci 2.50E-05 6.16E-05 6.38E-05 1.60E-04 Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci 1.33E+02 7.45E+01 7.94E+01 5.28E+01 Dissolved and Units Quarter 1 Quarter2 Quarter3 Quarter4 Entrained Gases Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci 2.17E-05 1.42E-05 2.40E-05 <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Total Ci 2.17E-05 1.42E-05 2.40E-05 N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release ReportforTMI - Page 9 of 17 TABLE 28 (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - CONTINUOUS MODE TMl-1 Fission and Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Products H-3 Ci 1.31E-02 1.02E-02 3.41 E-02 2.87E-02 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci 1.31E-02 1.02E-02 3.41E-02 2.87E-02 Dissolved and Units Quarter 1 Quarter2 Quarter3 Quarter4 Entrained Gases Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD e-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release Report for TMI - Page 10 of 17 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 SUPPLEMENTAL INFORMATION FACILITY: TMI UNIT 1 LICENSE: DPR 50-289

1. Regulatory Limits -- Please refer to TMI Offsite Dose Calculation Manual A. Fission and Activation Gases:

B. Iodines:

C. Particulates, Half-Lives > 8 Days:

D. Liquid Effluents:

2. Maximum Effluent Concentrations -- 10 Times CFR 20, Appendix B Table II Provide the maximum effluent concentrations used in determining allowable release rates or concentrations A. Fission and Activation Gases:

B. Iodines:

C. Particulates, Half-Lives > 8 Days:

D. Liquid Effluents:

3. Average Energy Provide the average energy (E-BAR) of the radionuclide mixture in releases of fission and activation gases, if applicable NIA

4. Measurements and Approximations of Total Radioactivity Provide the methods to measure or approximate the total radioactivity in effluents and the methods used to determine radionuclide composition:

A. Fission and Activ. Gases: HPGE Spectrometry, Liquid Scintillation B. Iodines: HPGE Spectrometry C. Particulates: HPGE Spectrometry, Gas Flow Proportional, Beta Spectrometry D. Liquid Effluents: HPGE Spectrometry, Liquid Scintillation E. Gross Alpha Gas Flow Proportional F. Carbon 14 Estimated using the methodology included in the EPRI Technical Report 1021106.

5. Batch Releases Provide the following information relating to batch releases of radioactive materials in liquid and gaseous effluents.

Quarter 1 Quarter 2 Quarter 3 Quarter4 A. LIQUID IALL TIMES IN MINUTES}

1. Number of batch releases 39 13 37 43

2. Total time period for batch releases (min) 10500 4090 13000 12600

3. Maximum time period for a batch release (min) 760 695 970 860

4. Average time period for a batch release (min) 268 314 352 292

5. Minimum time period for a batch release (min) 203 205 195 1

6. Average stream flow during periods of release of 3.29E+06 3.21E+06 1.66E+06 1.36E+06 effluent into a flowinq stream (cfml

8. GASEOUS

1. Number of batch releases 7 7 22 13

2. Total time period for batch releases (min) 4690 4580 32100 10100

3. Maximum time period for a batch release (min) 818 793 10100 1560

4. Average time period for a batch release (min) 670 655 1460 776

5. Minimum time period for a batch release (min\ 33 6 1 8

6. Abnormal Releases Quarter 1 Quarter 2 Quarter 3 Quarter4 A. LIQUID

1. Number of releases 3 3 3 3

2. Total activity released (curies) 2.72E-03 2.75E-03 2.78E-03 2.78E-03

8. GASEOUS

1. Number of releases 0 0 1 0

2. Total activitv released (curies\ 0 0 9.19E-03 0

2017 Annual Radioactive Effluent Release Report for TMI Attachment 1 - Page 11 of 17 TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES TMl-2 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. FISSION AND ACTIVATION GASES

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

2. Avg release rate for period µCilS NIA NIA NIA NIA

3. Percent of aoolicable limit % * * *

B. IODINES

1. Total Iodine 1131 Ci NIA NIA NIA NIA 25%

2. AvQ release rate for period µCilS NIA NIA NIA NIA

3. Percent of applicable limit % * * *

C. PARTICULATES

1. Part. With half-life >8 davs Ci <LLD <LLD <LLD <LLD 25%

2. AvQ release rate for period uCilS NIA NIA NIA NIA

3. Percent of applicable limit % * * * *

4. Gross aloha radioactivitv Ci <LLD <LLD <LLD <LLD D. TRITIUM

1. Total Release Ci 1.16E-01 1.08E-02 3.14E-02 1.49E-02 25%

2. AvQ release rate for period uCilS 1.50E-02 1.38E-03 3.95E-03 1.87E-03

3. Percent of applicable limit % * * *

Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

ODCM Limits - Listed on Dose summary Table

2017 Annual Radioactive Effluent Release Report for TMI - Page 12 of 17 TABLE 1D EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE TMl-2 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Gasses Ar-41 Ci N/A N/A N/A N/A Kr-85 Ci N/A N/A N/A N/A Kr-85m Ci N/A N/A N/A N/A Kr-87 Ci N/A N/A N/A N/A Kr-88 Ci N/A N/A N/A N/A Xe-133 Ci N/A N/A N/A N/A Xe-135 Ci N/A N/A N/A N/A Xe-135m Ci N/A N/A N/A N/A Xe-138 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter4 1-131 Ci N/A N/A N/A N/A 1-133 Ci N/A N/A N/A N/A 1-135 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Cr-51 Ci N/A N/A N/A N/A Mn-54 Ci N/A N/A N/A N/A Co-58 Ci N/A N/A N/A N/A Fe-59 Ci N/A N/A N/A N/A Co-60 Ci N/A N/A N/A N/A Sr-89 Ci N/A N/A N/A N/A Sr-90 Ci N/A N/A N/A N/A Mo-99 Ci N/A N/A N/A N/A Aq-110m Ci N/A N/A N/A N/A Cs-134 Ci N/A N/A N/A N/A Cs-137 Ci N/A N/A N/A N/A Ba-140 Ci N/A N/A N/A N/A La-140 Ci N/A N/A N/A N/A Ce-141 Ci N/A N/A N/A N/A Ce-144 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 H3 Ci N/A N/A N/A N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release Report for TMI - Page 13 of 17 TABLE 1 D (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE TMl-2 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Activation Gasses Ar-41 Ci <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter4 1-131 Ci N/A N/A N/A N/A 1-133 Ci N/A N/A N/A N/A 1-135 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD AQ-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 H3 Ci 1.16E-01 1.08E-02 3.14E-02 1.49E-02 Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

i I

2017 Annual Radioactive Effluent Release Report for TMI Attachment 1- Page 14 of 17 TABLE2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES TMl-2 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. FISSION AND ACTIVATION PRODUCTS

1. Total Release (Not incl. Tritium, Qases, alpha) Ci 1.26E-06 4.92E-06 4.90E-06 1.57E-06 25%

2. AvQ diluted concentration during period uCi/ml 1.65E-09 2.52E-11 3.41E-10 6.94E-12

3. Percent of applicable limit % * * *

B. TRITIUM

1. Total Release Ci <LLD 6.64E-06 2.73E-06 <LLD 25%

2. AvQ diluted concentration durinQ period µCi/ml N/A 1.46E-10 3.00E-11 N/A

3. Percent of applicable limit % * * *

C. DISSOLVED AND ENTRAINED GASES

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

2. AvQ diluted concentration durinQ period µCi/ml NIA N/A N/A N/A

3. Percent of applicable limit % * * *

D. GROSS ALPHA RADIOACTIVITY

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

E. VOLUME OF WASTE RELEASE {PRIOR TO LITERS 1.21E+03 2.57E+05 1.99E+04 2.05E+05 10%

DILUTION\

F. VOLUME OF DILUTION WATER USED LITERS 7.62E+05 1.95E+08 1.44E+07 2.26E+08 10%

Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

ODCM Limits - Listed on Dose summary Table

2017 Annual Radioactive Effluent Release Report for TMI - Page 15 of 17 TABLE 28 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - BATCH MODE TMl-2 Fission and Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Products H-3 Ci <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ao-110m Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci 1.26E-06 4.92E-06 4.90E-06 1.57E-06 Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci 1.26E-06 4.92E-06 4.90E-06 1.57E-06 Dissolved and Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Entrained Gases Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Total Ci NIA N/A N/A N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

_ ___J

2017 Annual Radioactive Effluent Release Report for TMI - Page 16 of 17 TABLE 2B(CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - CONTINUOUS MODE TMlm2 Fission and Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Products H-3 Ci N/A N/A N/A N/A Cr-51 Ci N/A N/A N/A N/A Mn-54 Ci N/A N/A N/A N/A Fe-55 Ci N/A N/A N/A N/A Co-58 Ci N/A N/A N/A N/A Fe-59 Ci N/A N/A N/A N/A Co-60 Ci N/A N/A N/A N/A Zn-65 Ci N/A N/A N/A N/A Sr-89 Ci N/A N/A N/A N/A Sr-90 Ci N/A N/A N/A N/A Zr-95 Ci N/A N/A N/A N/A Nb-95 Ci N/A N/A N/A N/A Mo-99 Ci N/A N/A N/A N/A Tc-99m Ci N/A N/A N/A N/A Ag-110m Ci N/A N/A N/A N/A 1-131 Ci N/A N/A N/A N/A Cs-134 Ci N/A N/A N/A N/A Cs-137 Ci N/A N/A N/A N/A Ba-140 Ci N/A N/A N/A N/A La-140 Ci N/A N/A N/A N/A Ce-141 Ci N/A N/A N/A N/A Ce-144 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Dissolved and Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Entrained Gases Kr-87 Ci N/A N/A N/A N/A Kr-88 Ci N/A N/A N/A N/A Xe-133 Ci N/A N/A N/A N/A Xe-133m Ci N/A N/A N/A N/A Xe-135 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A

2017 Annual Radioactive Effluent Release Report for TMI - Page 17 of 17 TABLE 3 ODCM REQUIRED LOWER LIMIT OF DETECTION (LLD)

Gaseous Sampling Radioisotope: LLD Value Tritium 1E-06 µCi/ml Principal Gamma Emitters Gas (Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135 1E-04 uCi/ml Principal Gamma Emitters Particulate Mn-54 1E-11 µCi/ml Fe-59 1E-11 uCi/ml Co-58 1E-11 µCi/ml Co-60 1E-11 uCi/ml Zn-65 1E-11 uCi/ml Mo-99 1E-11 µCi/ml Cs-137 1E-11 uCi/ml Ce-141 1E-11 uCi/ml Ce-144 1E-11 µCi/ml Iodine 131 1E-12 uCi/ml Gross Alpha 1E-11 uCi/ml Sr-89 1E-11 uCi/ml Sr-90 1E-11 uCi/ml Liquid Sampling Radioisotope: LLD Value Tritium 1E-05 µCi/ml Principal Gamma Emitters Mn-54 5E-07 uCi/ml Fe-59 5E-07 uCi/ml Co-58 5E-07 uCi/ml Co-60 5E-07 µCi/ml Zn-65 5E-07 µCi/ml Mo-99 5E-07 uCi/ml Cs-134 5E-07 µCi/ml Cs-137 5E-07 uCi/ml Ce-141 5E-07 uCi/ml Ce-144 5E-07 µCi/ml Iodine 131 1E-06 uCi/ml Dissolved and Entrained Gases Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135) 1E-05 µCi/ml Fe-55 1E-06 uCi/ml Gross Alpha 1E-07 uCi/ml Sr-89 5E-08 µCi/ml Sr-90 5E-08 µCi/ml

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 4 Solid Waste Shipped Offsite During 2017

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 4 2017 Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments TMl-1 A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Total Est.

Types of Waste Quantity Activity Period Total (m3) (Ci) Error%

a. Spent resins, filter sludges, evaporator bottoms, 9.22E+01 3.40E+02 01/01/17- +/- 25%

etc. 12/31/17

b. Dry compressible waste, contaminated equip, etc. 3.94E+02 3.SSE-01 01/01/17- +/-25%

12/31/17

c. Irradiated components, control rods, etc. 2.79E-02 4.13E-01 01/01/17- +/- 25%

12/31/17

d. Other (describe) O.OOE+OO O.OOE+OO 01/01/17- +/- 25%

12/31/17

2. Estimate of major nuclide composition (by waste type)

Ma"or Nuclide Com osition %

a. Co-60 55.00%

Ni-63 23.91%

b. Co-60 39.99%

Ni-63 21.59%

Cs-137 17.96%

c Co-60 63.69%

Fe-55 18.03%

d. None

2017 Annual Radioactive Effluent Release Report for TMI - Page 3 of 4 2017 Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments TMlm1

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 28 Hittman Transport Services Energy Solutions LLC 1560 Bear Creek Rd 1 Landstar Ranger Inc. Energy Solutions 1560 Bear Creek Rd 3 Hittman Transport Services Energy Solution Clive Disposal Site, Utah 1 Hittman Transport Services Waste Control Specialists LLC Andrews Texas B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination None None None C. Changes to the Process Control Program RW-AA-100: PROCESS CONTROL PROGRAM FOR RADIOACTIVE WASTES was revised 9/30/17 to remove references to Fort Calhoun and add references to Fitzpatrick. No functional change for TMI.

2017 Annual Radioactive Effluent Release Report for TMI Attachment 2 - Page 4 of 4 2017 Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments TMl-2 A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Total Est.

Types of Waste Quantity Activity Period Total (ma) (Ci) Error%

a. Spent resins, filter sludges, evaporator bottoms, O.OOE+OO O.OOE+OO 01/01/17- +/-25%

etc. 12/31/17

b. Dry compressible waste, contaminated equip, O.OOE+OO O.OOE+OO 01/01/17- +/-25%

etc. 12/31/17 C. Irradiated components, control rods, etc. O.OOE+OO O.OOE+OO 01/01/17- +/- 25%

12/31/17

d. Other (describe) radwaste system sump excess 2.65E+01 2.02E+OO 01/01/17- +/- 25%

water from rain intrusion 12/31/17

2. Estimate of major nuclide composition (by waste type)

Major Nuclide Comoosition %

a. None

b. None C. None

d. Cs-137 85.97%

Sr-90 13.09%

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 2 Hittman Transport Services Energy Solutions LLC 1560 Bear Creek Rd.

B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination None None None L_

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 Summary of Unplanned Releases from the TMI Site During 2017 There were no unplanned releases from TMl-2 in 2017. The unplanned releases for TMl-1 are summarized in the supplemental information in Attachment 1. The information is reported separately for liquid and gaseous releases, and the number of releases is reported for each quarter with a total curies released. The activity for these releases is also included in Tables 2A and 28.

The abnormal liquid releases are monthly releases to account for the tritium in groundwater released into the river. There was one unplanned gaseous release for TMl-1, captured in IR 04049166. This release occurred when both containment doors were open at the same time, for less than one minute.

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 CHANGES TO THE PROCESS CONTROL PROGRAM AND THE OFFSITE DOSE CALCULATION MANUAL DURING 2017 AND A LISTING OF NEW LOCATIONS FOR DOSE CALCULATIONS AND/OR ENVIRONMENTAL MONITORING IDENTIFIED BY THE LAND USE CENSUS

1. Changes to the Process Control Program There were minor changes to the TMI Process Control Program, RW-M-100 Rev. 12 issued on 9/30/17, did not make a change to TMl's PCP.

2. Changes to the Offsite Dose Calculation Manual There was one change to the Offsite Dose Calculation Manual approved in 2017. The procedure change is attached in Enclosure 1.

3. A listing of new locations for dose calculations and/or environmental monitoring identified by the Land Use Census.

Based on the results of the 2017 Land Use Census, no changes were required to the Radiological Environmental Monitoring Program. The Land Use Census identified minor changes to the closest resident in Sectors A (N), and B (NNE). The satellite imagery indicated that the residents in these sectors are closer to the plant than previously reported.

Other minor changes occurred with gardens in Sectors L(SW) and N(W). A new garden in Sector L was identified farther than the plant that is closer to the 500 sq. ft. requirement than the current garden in that sector. The home in Sector N is under new ownership, but there is still a garden at that residence.

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 Instrumentation Not Returned to Operable Status Within 30 Days During 2017 There were no instruments not returned to operable status within 30 days per the TMI ODCM Part 1, Sections 2.1.1.b and 2.1.2.b, and Part 2, Section 2.1.2.b, during 2017.

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 17 Annual Summary of Hourly Meteorological Data for The osprey did return and nest on the TMI meteorological tower. However, the station was able to calibrate the sensors and instrumentation before and after the osprey nested. The percent data recovery for meteorological information for 2017 was 99.9 percent. The data is presented by quarter.

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Extremely Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 0 3 0 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 0 0 0 0 0 ESE 1 0 2 0 0 0 3 SE 0 1 0 0 0 0 1 SSE 0 1 1 0 0 0 2 s 0 1 0 1 0 0 2 SSW 0 0 7 2 0 0 9 SW 0 0 0 2 0 0 2 WSW 0 1 0 0 0 0 1 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 3 2 0 0 0 0 5 NNW 0 5 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 4 14 10 5 2 0 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing siability measurements in all stability classes: 0 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Moderately Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 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 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 2 2 0 0 0 4 SE 0 2 0 0 0 0 2 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 3 1 0 0 0 4 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 1 1 0 0 2 WNW 0 o* 0 2 1 0 3 NW 0 0 0 2 0 0 2 NNW 0 0 1 0 1 1 3 Variable 0 0 0 0 0 0 0 Total 1 7 5 5 2 21 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

2017 Annual Radioactive Effluent Release Report for TMI - Page 3 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Slightly Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19- 24 >24 Total N 0 0 1 0 0 0 1 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 2 0 1 0 0 3 SE 0 3 0 0 0 0 3 SSE 0 2 0 0 0 0 2 s 0 1 2 1 0 0 4 SSW 0 0 1 0 0 0 1 SW 0 1 0 0 0 0 1 WSW 0 0 0 0 0 0 0 w 0 2 3 0 0 0 5 WNW 0 1 0 1 3 0 5 NW 0 1 1 4 3 3 9 NNW 0 0 1 0 4 3 8 Variable 0 0 0 0 0 0 0 Total 0 13 9 7 10 3 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 ciasses: 0 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Neutral - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19 - 24 > 24 Total N 3 11 29 11 0 0 54 NNE 2 12 2 0 0 0 16 NE 4 12 6 0 0 0 22 ENE 7 14 12 1 0 0 34 E 18 6 23 12 0 0 59 ESE 4 19 40 9 0 0 72 SE 6 18 4 0 0 0 28 SSE 5 13 5 0 0 0 23 s 3 14 13 2 0 0 32 SSW 4 12 12 1 0 0 29 SW 3 16 9 2 1 0 31 WSW 2 12 10 9 5 0 38 w 1 22 55 47 11 2 138 WNW 3 13 67 109 44 2 238 NW 3 12 50 58 50 6 179 NNW 4 20 27 17 5 0 73 Variable 0 0 0 0 0 0 0 Total 72 226 364 278 116 10 1066 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

2017 Annual Radioactive Effluent Release Report for TMI - Page 4 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Slightly Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 24 38 6 6 0 0 74 NNE 13 20 1 0 0 0 34 NE 20 13 4 0 0 0 37 ENE 10 14 1 0 0 0 25 E 13 18 5 1 0 0 37 ESE 7 15 1 0 0 0 23 SE 6 6 0 0 0 0 12 SSE 5 13 2 0 0 0 20 s 4 27 9 6 0 0 46 SSW 10 12 28 8 0 0 58 SW 8 10 16 5 0 0 39 WSW 10 14 4 6 0 0 34 w 9 20 14 5 3 0 51 WNW 16 17 19 3 3 2 60 NW 15 15 38 19 0 0 87 NNW 28 30 12 10 1 0 81 Variable 0 0 0 0 0 0 0 Total 198 282 160 69 7 2 718 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Moderately Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 11 5 0 0 0 0 16 NNE 3 3 0 0 0 0 6 NE 7 2 0 0 0 0 9 ENE 4 3 0 0 0 0 7 E 8 6 0 0 0 0 14 ESE 8 2 0 0 0 0 10 SE 9 1 0 0 0 0 10 SSE 8 5 0 0 0 0 13 s 12 6 0 0 0 0 18 SSW 2 8 2 1 0 0 13 SW 7 6 1 0 0 0 14 WSW 6 3 1 0 0 0 10 w 1 4 3 0 0 0 8 WNW 8 2 1 0 0 0 11 NW 5 3 2 1 0 0 11 NNW 7 4 6 1 0 0 18 Variable 0 0 0 0 0 0 0 Total 106 63 16 3 0 0 188 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

2017 Annual Radioactive Effluent Release Report for TMI - Page 5 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Extremely Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 -24 > 24 Total N 3 1 1 0 0 0 5 NNE 6 2 0 0 0 0 8 NE 3 0 0 0 0 0 3 ENE 5 0 0 0 0 0 5 E 5 0 0 0 0 0 5 ESE 8 1 0 0 0 0 9 SE 4 0 0 0 0 0 4 SSE 5 2 0 0 0 0 7 s 2 2 0 0 0 0 4 SSW 2 2 0 0 0 0 4 SW 2 3 0 0 0 0 5 WSW 5 1 0 0 0 0 6 w 1 3 0 0 0 0 4 WNW 2 3 1 0 0 0 6 NW 1 2 0 0 0 0 3 NNW 4 4 0 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 58 26 2 0 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: 0

2017 Annual Radioactive Effluent Release Report for TMI - Page 6 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Extremely Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 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 0 0 0 0 0 ESE 0 1 1 0 0 0 2 SE 0 1 6 5 0 0 12 SSE 0 0 1 0 0 0 1 s 0 0 6 0 0 0 6 SSW 0 1 10 1 1 0 13 SW 2 1 2 0 0 0 5 WSW 2 0 1 0 0 0 3 w 0 4 0 0 0 0 4 WNW 0 4 0 0 0 0 4 NW 1 5 1 0 0 0 7 NNW 1 4 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 6 23 28 6 0 64 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: 4 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Moderately Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1...:.1 4-7 8 -12 13 - 18 19 -24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 2 0 0 0 0 2 E 0 2 0 0 0 0 2 ESE 0 5 4 0 0 0 9 SE 0 1 3 1 0 0 5 SSE 0 1 0 0 0 0 1 s 0 1 2 2 0 0 5 SSW 0 3 3 0 2 0 8 SW 0 2 1 0 0 0 3 WSW 0 0 1 0 0 0 1 w 1 1 3 0 0 0 5 WNW 0 0 0 0 0 0 0 NW 2 4 3 0 0 0 9 NNW 0 1 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 3 24 21 3 2 0 53 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 7 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Slightly Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction ~ 4-7 8 -12 13 - 18 19 -24 >24 Total N 0 2 0 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 2 0 0 0 0 2 ENE 0 2 0 0 0 0 2 E 0 1 0 0 0 0 1 ESE 0 1 4 0 0 0 5 SE 0 3 8 1 0 0 12 SSE 0 0 0 0 0 0 0 s 1 2 1 1 1 0 6 SSW 0 0 2 1 0 0 3 SW 0 2 1 0 0 0 3 WSW 0 0 7 1 2 0 10 w 0 3 4 0 0 0 7 WNW 1 1 3 0 0 0 5 NW 0 3 4 0 0 0 7 NNW 1 4 3 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 3 26 37 4 3 0 73 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: 4 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Neutral -145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19-24 > 24 Total N 8 19 15 0 0 0 42 NNE 5 21 2 0 0 0 28 NE 12 14 12 0 0 0 38 ENE 9 36 9 0 0 0 54 E 5 56 38 4 0 0 103 ESE 3 38 72 15 0 0 128 SE 6 26 39 8 0 0 79 SSE 4 14 10 0 0 0 28 s 6 22 19 7 0 0 54 SSW 9 34 28 7 1 0 79 SW 4 27 30 4 0 0 65 WSW 6 13 26 2 1 0 48 w 5 16 45 23 0 0 89 WNW 10 10 45 23 8 0 96 NW 17 17 49 45 1 0 129 NNW 11 26 13 7 0 0 57 Variable 0 0 0 0 0 0 0 Total 120 389 452 145 11 0 1117 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 8 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Slightly Stable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19-24 > 24 Total N 10 20 7 0 0 0 37 NNE 4 17 0 0 0 0 21 NE 8 6 0 0 0 0 14 ENE 7 13 1 0 0 0 21 E 17 12 1 0 0 0 30 ESE 8 10 3 0 0 0 21 SE 5 3 7 2 0 0 17 SSE 5 5 0 0 0 0 10 s 7 18 9 1 0 0 35 SSW 6 25 24 5 1 0 61 SW 16 22 16 1 0 0 55 WSW 22 20 10 5 3 0 60 w 17 30 9 2 2 0 60 WNW 14 19 16 6 3 0 58 NW 20 15 23 8 1 0 67 NNW 10 20 7 4 0 0 41 Variable 0 0 0 0 0 0 0 Total 176 255 133 34 10 0 608 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: 4 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Moderately Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction ~ 4-7 8 -12 13 - 18 19 -24 > 24 Total N 3 2 0 0 0 0 5 NNE 2 0 0 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 4 3 0 0 0 0 7 E 5 3 0 0 0 0 8 ESE 11 0 0 0 0 0 11 SE 3 0 0 0 0 0 3 SSE 11 1 0 0 0 0 12 s 8 1 0 0 0 0 9 SSW 10 6 0 0 0 0 16 SW 16 4 0 0 0 0 20 WSW 13 4 0 0 0 0 17 w 10 4 0 0 0 0 14 WNW 6 4 0 0 0 0 10 NW 8 4 0 0 0 0 12 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 115 37 0 0 0 0 152 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 9 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Extremely Stable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 2 0 0 0 0 0 2 NNE 4 0 0 0 0 0 4 NE 2 0 0 0 0 0 2 ENE 4 0 0 0 0 0 4 E 3 1 0 0 0 0 4 ESE 5 1 0 0 0 0 6 SE 8 0 0 0 0 0 8 SSE 11 0 0 0 0 0 11 s 4 1 1 0 0 0 6 SSW 10 1 1 0 0 0 12 SW 7 1 0 0 0 0 8 WSW 5 3 0 0 0 0 8 w 10 8 0 0 0 0 18 WNW 7 0 0 0 0 0 7 NW 6 0 1 0 0 0 7 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 92 16 3 0 0 0 111 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: 4

2017 Annual Radioactive Effluent Release Report for TMI Attachment 6 - Page 10 of 17 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Extremely Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 2 5 0 0 0 7 SE 0 0 2 0 0 0 2 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 4 0 0 0 4 SW 0 2 1 0 0 0 3 WSW 0 2 0 0 0 0 2 w 0 0 0 0 0 0 0 WNW 5 1 0 0 0 0 6 NW 3 5 2 0 0 0 10 NNW 3 5 0 1 0 0 9 Variable 0 0 0 0 0 0 0 Total 11 17 14 0 0 43 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: 4 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Moderately Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19 -24 > 24 Total N 0 3 0 0 0 0 3 NNE 0 1 1 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 8 0 0 0 0 8 ESE 0 5 3 0 0 0 8 SE 0 1 2 0 0 0 3 SSE 0 1 0 0 0 0 1 s 0 0 0 0 0 0 0 SSW 0 4 3 1 0 0 8 SW 0 3 2 0 0 0 5 WSW 1 1 0 0 0 0 2 w 2 1 0 0 0 0 3 WNW 4 3 0 0 0 0 7 NW 5 9 1 0 0 0 15 NNW 2 2 0 2 2 0 8 Variable 0 0 0 0 0 0 0 Total 14 43 12 3 1 0 74 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 11 of 17 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Slightly Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19 -24 > 24 Total N 0 1 3 0 0 0 4 NNE 0 0 1 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 3 0 0 0 0 3 E 0 2 0 0 0 0 2 ESE 1 2 2 0 0 0 5 SE 0 0 1 0 0 0 1 SSE 0 1 0 0 0 0 1 s 0 0 0 0 0 0 0 SSW 0 3 4 0 0 0 7 SW 3 8 1 0 0 0 12 WSW 0 0 0 0 0 0 0 w 1 2 0 0 0 0 3 WNW 7 4 0 0 0 0 11 NW 3 5 2 0 0 0 10 NNW 1 6 4 1 6 0 18 Variable 0 0 0 0 0 0 0 Total 16 37 18 1 6 0 78 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: 4 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Neutral - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction ~ 4-7 8 -12 13 - 18 19 -24 > 24 Total N 16 26 16 5 0 0 63 NNE 13 11 1 0 0 0 25 NE 14 16 0 0 0 0 30 ENE 5 33 1 0 0 0 39 E 18 35 8 0 0 0 61 ESE 7 14 16 0 0 0 37 SE 7 17 3 0 0 0 27 SSE 2 20 2 0 0 0 24 s 4 15 3 0 0 0 22 SSW 8 19 . 12 1 0 0 40 SW 7 28 20 0 0 0 55 WSW 8 28 22 0 0 0 58 w 14 21 14 0 0 0 49 WNW 21 35 28 4 0 0 88 NW 24 38 60 4 0 0 126 NNW 27 35 47 11 3 0 123 Variable 0 0 0 0 0 0 0 Total 195 391 253 25 3 0 867 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 12 of 17 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Slightly Stable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19 -24 > 24 Total N 23 66 13 2 0 0 104 NNE 12 18 2 0 0 0 32 NE 17 11 0 0 0 0 28 ENE 17 11 0 0 0 0 28 E 19 22 0 0 0 0 41 ESE 21 14 1 0 0 0 36 SE 13 2 0 0 0 0 15 SSE 17 4 0 0 0 0 21 s 10 13 1 0 0 0 24 SSW 12 22 5 0 0 0 39 SW 21 24 6 0 0 0 51 WSW 29 32 4 0 0 0 65 w 44 39 5 0 0 0 88 WNW 25 30 4 0 0 0 59 NW 19 24 6 1 0 0 50 NNW 20 60 15 1 0 0 96 Variable 0 0 0 0 0 0 0 Total 319 392 62 4 0 0 777 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: 4 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Moderately Stable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19-24 > 24 Total N 18 8 0 0 0 0 26 NNE 9 1 0 0 0 0 10 NE 4 1 1 0 0 0 6 ENE 5 4 0 0 0 0 9 E 19 8 0 0 0 0 27 ESE 24 4 0 0 0 0 28 SE 9 0 0 0 0 0 9 SSE 6 0 0 0 0 0 6 s 8 3 0 0 0 0 11 SSW 21 4 0 0 0 0 25 SW 26 4 0 0 0 0 30 WSW 33 2 0 0 0 0 35 w 39 1 0 0 0 0 40 WNW 24 0 1 0 0 0 25 NW 18 0 0 0 0 0 18 NNW 18 8 1 0 0 0 27 Variable 0 0 0 0 0 0 0 Total 281 48 3 0 0 0 332 Hours of calm in this stability class: 8 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 13 of 17 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Extremely Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 2 0 0 0 0 0 2 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 3 0 0 0 0 0 3 SSW 2 0 0 0 0 0 2 SW 6 0 0 0 0 0 6 WSW 3 0 0 0 0 0 3 w 3 0 0 0 0 0 3 WNW 0 0 0 0 0 0 0 NW 3 0 0 0 0 0 3 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 24 0 0 0 0 0 24 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 14 of 17 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Extremely Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 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 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 1 0 0 0 0 1 SE 0 1 0 0 0 0 1 SSE 0 1 0 0 0 0 1 s 1 0 1 0 0 0 2 SSW 0 1 3 2 0 0 6 SW 1 1 0 0 0 0 2 WSW 1 0 0 0 0 0 1 w 3 0 0 0 0 0 3 WNW 1 0 0 0 0 0 1 NW 2 5 0 0 0 0 7 NNW 1 2 1 0 1 0 5 Variable 0 0 0 0 0 0 0 Total 10 13 5 2 0 31 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Moderately Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 1 0 0 0 0 1 ESE 0 1 0 0 0 0 1 SE 0 1 0 0 0 0 1 SSE 0 1 0 0 0 0 1 s 0 1 1 1 0 0 3 SSW 0 5 3 0 0 0 8 SW 0 1 0 0 0 0 1 WSW 0 1 0 0 0 0 1 w 0 0 0 0 0 0 0 WNW 1 1 0 0 0 0 2 NW 2 0 1 0 1 0 4 NNW 0 0 0 1 2 0 3 Variable 0 0 0 0 0 0 0 Total 3 14 5 2 3 0 27 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

2017 Annual Radioactive Effluent Release Report for TMI - Page 15 of 17 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Slightly Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 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 1 0 0 0 0 1 SE 0 4 0 0 0 0 4 SSE 0 3 1 0 0 0 4 s 0 2 1 0 0 0 3 SSW 0 1 2 0 0 0 3 SW 0 4 0 2 0 0 6 WSW 0 0 0 0 0 0 0 w 1 0 1 2 0 0 4 WNW 0 0 1 0 0 0 1 NW 0 1 3 1 1 0 6 NNW 4 3 1 2 4 0 14 Variable 0 0 0 0 0 0 0 Total 5 19 10 7 5 0 46 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 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Neutral -145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1- 3 4-7 8 -12 13 - 18 19 -24 >24 Total N 11 30 10 1 0 0 52 NNE 10 8 0 0 0 0 18 NE 8 4 0 0 0 0 12 ENE 10 10 3 0 0 0 23 E 8 23 10 0 0 0 41 ESE 2 24 23 0 0 0 49 SE 5 19 13 5 0 0 42 SSE 4 21 7 0 0 0 32 s 7 11 22 1 0 0 41 SSW 4 36 21 0 0 0 61 SW 3 17 18 3 0 0 41 WSW 5 16 8 1 0 0 30 w 3 26 40 25 4 0 98 WNW 11 20 46 41 19 1 138 NW 19 12 65 62 21 1 180 NNW 23 29 37 10 2 0 101 Variable 0 0 0 0 0 0 0 Total 133 306 323 149 46 2 959 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

2017 Annual Radioactive Effluent Release Report for TMI - Page 16 of 17 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Slightly Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1...:.1 4-7 8 - 12 13 - 18 19 -24 > 24 Total N 25 27 6 4 0 0 62 NNE 17 7 0 0 0 0 24 NE 16 4 0 0 0 0 20 ENE 21 11 0 0 0 0 32 E 10 11 1 0 0 0 22 ESE 19 11 8 0 0 0 38 SE 13 11 11 3 0 0 38 SSE 9 16 4 1 0 0 30 s 11 18 6 0 1 0 36 SSW 11 20 14 2 1 0 48 SW 11 33 28 1 0 0 73 WSW 19 21 4 1 1 0 46 w 16 23 11 1 1 0 52 WNW 17 5 15 4 0 0 41 NW 23 14 19 15 1 0 72 NNW 23 25 10 5 0 0 63 Variable 0 0 0 0 0 0 0 Total 261 257 137 37 5 0 697 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Moderately Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1...:.1 4-7 8 -12 13 - 18 19 - 24 >24 Total N 17 3 0 0 0 0 20 NNE 10 2 0 0 0 0 12 NE 5 0 0 0 0 0 5 ENE 4 0 0 0 0 0 4 E 9 2 0 0 0 0 11 ESE 17 2 0 0 0 0 19 SE 15 1 0 0 0 0 16 SSE 21 1 0 0 0 0 22 s 16 1 0 0 0 0 17 SSW 19 6 1 0 0 0 26 SW 17 7 2 0 0 0 26 WSW 25 9 0 0 0 0 34 w 16 4 1. 0 0 0 21 WNW 12 1 0 0 0 0 13 NW 19 1 1 0 0 0 21 NNW 14 5 0 0 0 0 19 Variable 0 0 0 0 0 0 0 Total 236 45 5 0 0 0 286 Hours of calm in this stability class: 10 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

2017 Annual Radioactive Effluent Release Report for TMI - Page 17 of 17 Three Mile Island Alpha Period of Record: October - December 2017 Stability Class - Extremely Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 0 1 0 0 0 0 1 NE 3 0 0 0 0 0 3 ENE 3 0 0 0 0 0 3 E 2 0 0 0 0 0 2 ESE 9 0 0 0 0 0 9 SE 14 1 0 0 0 0 15 SSE 14 0 0 0 0 0 14 s 14 3 0 0 0 0 17 SSW 9 5 1 0 0 0 15 SW 7 4 0 0 0 0 11 WSW 12 2 0 0 0 0 14 w 3 4 0 0 0 0 7 WNW 6 3 0 0 0 0 9 NW 10 2 0 0 0 0 12 NNW 4 3 0 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 113 31 0 0 0 145 Hours of calm in this stability class:. 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 4 Assessment of Radiation Doses Due to Radioactive Liquid and Gaseous Effluents Released from TMI During 2017 The attached table presents the maximum hypothetical doses to an individual and the general population resulting from TMl-1 releases of gaseous and liquid effluents. Provided below is a brief explanation of the table.

A. Liquid {Individual)

Calculations were performed on the four age groups and seven organs recommended in Regulatory Guide 1.109. The pathways considered for TMl-1 were the consumption of drinking water and fish. These two pathways are considered to be the primary recreational activities associated with the Susquehanna River in the vicinity of TMI. The "critical receptor" or Receptor 1 was that individual who 1) consumed Susquehanna River water from the nearest downstream drinking water supplier (Wrightsville Water Supply) and 2) consumed fish residing in the vicinity of the TMl-1 liquid discharge.

For the calculated maximum whole body (or total body) dose from TMl-1 liquid effluents was 1.94E-2 mrem to an adult (line 1). The maximum organ dose was 2.42E-2 mrem to the liver of an adult (line 2).

B. Gaseous (Individual)

There were five major pathways considered in the dose calculations for TMl-1 gaseous effluents. These were: (1) plume exposure (2) inhalation, consumption of; (3) cow milk, (4) vegetables and fruits and (5) meat.

Lines 3 and 4 present the maximum plume exposure at or beyond the site boundary. The notation of "air dose" is interpreted to mean that these doses are not to an individual, but is considered to be the maximum doses that would have occurred at or beyond the site boundary. The calculated maximum plume exposures were 7.23E-4 mrad and 7.04E-4 mrad for gamma and beta, respectively.

The maximum organ dose due to the release of iodines, particulates and tritium from TMl-1 in was 4.'0BE-1 mrem to the bone of a child. This dose again reflects the maximum exposed organ for the appropriate age group (line 5).

For TMl-1 liquid and gaseous effluents resulted in maximum hypothetical doses that were a small fraction of the quarterly and yearly ODCM dose limits.

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 4 TMl-1

SUMMARY

OF MAXIMUM INDIVIDUAL DOSES FOR TMl-1 FROM January 1, 2017 through December 31, 2017 ODCM Dose

% of ODCM Dose Limit Applicable Estimated Limit (mrem)

Effluent Age Group Organ Dose (mrem)

Quarter Annual Quarter Annual (1) Liquid Total Body 1.94E-2 Adult 1.29EO 6.47E-1 1.5 3 (2) Liquid Liver 2.42E-2 Adult 4.84E-1 2.42E-1 5 10 (3) Noble Gas Air Dose 7.23E-4 - 1.45E-2 7.23E-3 5 10 (gamma-mrad)

(4) Noble Gas Air Dose 7.04E-4 - 7.04E-3 3.52E-4 10 20 (beta-mrad)

(5) Iodine, Tritium Bone 4.08E-1 Child 5.44EO 2.72EO 7.5 15

& Particulates

2017 Annual Radioactive Effluent Release Report for TMI - Page 3 of 4 The attached table presents the maximum hypothetical doses to an individual and the general population resulting from TMl-2 releases of gaseous and liquid effluents. Provided below is a brief explanation of the table.

A. Liquid (Individual)

Calculations were performed on the four age groups and seven organs recommended in Regulatory Guide 1.109. The pathways considered for TMl-2 were the consumption of drinking water and fish. These two pathways are considered to be the primary recreational activities associated with the Susquehanna River in the vicinity of TMI. The "critical receptor" or Receptor 1 was that individual who 1) consumed Susquehanna River water from the nearest downstream drinking water supplier (Wrightsville Water Supply) and 2) consumed fish residing in the vicinity of the TMl-2 liquid discharge.

For the calculated maximum whole body (or total body) dose from TMl-2 liquid effluents was 3.1 ?E-4 mrem to an adult (line 1). The maximum organ dose was 5.04E-4 mrem to the liver of a teen (line 2).

B. Gaseous (Individual)

There were five major pathways considered in the. dose calculations for TMl-2 gaseous effluents. These were: (1) plume exposure (2) inhalation, consumption of; (3) cow milk, (4) vegetables and fruits and (5) meat.

Since there were no noble gases released from TMl-2 during, the gamma and beta air doses (lines 3 and 4, respectively) were zero.

The maximum organ dose due to the release of particulates and tritium from TMl-2 in was 3.38E-5 mrem to the liver, total body, thyroid, kidney, lung, and GI tract of a child (line 5).

For TMl-2 liquid and gaseous effluents resulted in maximum hypothetical doses that were a small fraction of the quarterly and yearly ODCM dose limits.

2017 Annual Radioactive Effluent Release Report for TMI - Page 4 of 4 TMl-2

SUMMARY

OF MAXIMUM INDIVIDUAL DOSES FOR TMl-2 FROM January 1, through December 31, 2017 ODCM Dose

% of ODCM Dose Limit Applicable Estimated Limit (mrem)

Effluent Age Group Organ Dose (mrem)

Quarter Annual Quarter Annual (1) Liquid Total Body 3.17E-4 Adult 2.11 E-2 1.06E-2 1.5 3 (2) Liquid Liver 5.04E-4 Teen 1.01E-2 5.04E-3 5 10 (3) Noble Gas Air Dose 0 - 0 0 5 10 (gamma-mrad)

(4) Noble Gas Air Dose 0 - 0 0 10 20 (beta-mrad)

(5) Tritium & Liver, Total 3.38E-5 Child 4.51E-4 2.25E-4 7.5 15 Particulate Body, Thyroid, Kidney, Lung &

GI Tract

2017 Annual Radioactive Effluent Release Report for TMI Attachment 8 - Page 1 of 2 Assessment of Radiation Doses from Liquid and Gaseous Effluents Releases to Members of the Public within the TMI Site Boundaries During 2017 The Offsite Dose Calculation Manual requires an assessment of the radiation doses

. from radioactive liquid and gaseous effluents to members of the public due to their activities inside the site boundary during the reporting period. The estimated dose to a member of the public at or within the TMI Site Boundary was 0.79 mrem for 2017.

The following are the assumptions made in this assessment:

Access to the TMI Owner Controlled Area is limited to only those persons who have business related activities that support the operation of the facility. Therefore, based on the definition of a 'member of the public' in NUREG-1301, there is no credible scenario for this individual to receive non-occupational dose inside the TMI Owner Controlled Area. The scenario selected will be recreational use of the Susquehanna River and shoreline next to the Owner Controlled Area fence. Based on the two definitions of Site Boundary in the ODCM, this scenario is AT the Site Boundary for liquid releases but INSIDE the Site Boundary for gaseous releases.

A member of the public stays next to the owner controlled area for 67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months . The 67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months is based upon Reg. Guide 1.109 shoreline recreation period given in Table E-5.

This is a table of recommended values to be used for the maximum exposed individual in lieu of site-specific data. Three Mile Island is co-located with other islands in the Lake Frederick area of the Susquehanna River. This area is used recreationally for boating and fishing over the summer months. The application of the 67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months of recreational use from Reg. Guide 1.109 is appropriate.

The highest dose from liquid releases is characterized by release L20171017-388-B.

This release was from the Industrial Waste Filter Sump. The total body dose from release L20171017-388-B was 4.10E-3 mrem.

The highest dose from a single airborne release is characterized by release G20170313-146-C. This release was from TMl's Auxiliary and Fuel Handling Buildings ventilation system. The release contained airborne tritium from spent fuel pool evaporation. This release occurred over 203 hours0.00235 days 0.0564 hours 3.356481e-4 weeks 7.72415e-5 months . The entire dose from this release will be applied to the 67 hour7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months recreational use period. The application of the total dose from this release to 67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months is conservative. The maximum individual dose from release G20170313-146-C was 1.39E-2 mrem to the bone of a child.

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 2 The highest fenceline direct radiation result (assumed to be equal to dose) will be added to the dose from the highest liquid and gaseous releases to yield the hypothetical maximum dose to a member of the public within the site boundaries.

The highest fenceline direct radiation result for 2017 was from Station N1-3 and was 36.9 mrem per quarter. The net direct radiation dose, obtained by subtracting the results from a control station dosimeter from the indicator results, was not used. This again is conservative.

Calculations:

36.9 mrem/qtr

1/91.5 d/qtr

1/24 hr/day* 67 hr= 1.13 mrem The dose from liquid release L20171017-388-B was 0.00410 mrem.

The dose from gas release 820170313-146-C was 0.0139 mrem.

Total Dose Calculation 1.13 mrem + 0.00410 mrem + 0.0139 mrem = 1.15 mrem

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 Assessment of Radiation Dose to Most Likely Exposed Real Individual per 40 CFR 190 Dose calculations were performed to demonstrate compliance with 40 CFR 190 (ODCM Part IV Section 2.10). Gaseous and liquid effluents released from TMl-1 and TMl-2 in 2017 resulted in maximum individual doses (regardless of age group) of 0.12 mrem to the thyroid and 0.43 mrem to any other organ including the whole (total) body. The direct radiation component was determined using the highest quarterly fence-line exposure rate as measured by an environmental dosimeter, and subtracting from it, the lowest quarterly environmental dosimeter exposure rate.

Based on the maximum exposure rate of 36.9 mR/quarter, a person residing at the fence-line for 67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months (shoreline exposure from Reg. Guide 1.109) received an exposure of 1.13 mR. Based on the lowest exposure rate of 15.4 mR/quarter and converting it by the same method yielded a background exposure of 0.47 mR.

Therefore, the net exposure from direct radiation from TMINS was 0.66 mR. Combining the direct radiation exposure (assumed to be equal to dose) with the maximum organ doses from liquid and gaseous releases, the maximum potential (total) doses were 0.78 mrem to the thyroid and 1.09 mrem to any other organ. Both doses were well below the limits specified in 40 CFR 190.

2017 Annual Radioactive Effluent Release Report for TMI 0 - Page 1 of 1

Deviations from the ODCM Sampling and Analysis Regime During 2017

2017 Annual Radioactive Effluent Release Report for TMI 1 - Page 1 of 1 Major Changes to Radioactive Waste Treatment Systems The following information is for inclusion in the TMl-1/2 Radiological Effluents Report pursuant to Tech Spec Amendment 284.

UFSAR Section 11.2.6 requires reporting of Major changes to Radioactive Waste Treatment Systems. Major changes are interpreted to mean changes that would alter how the system functions or changes that would affect operational exposures, offsite -dose rates or integrated doses. There were no major changes to the liquid, gaseous, or solid radioactive waste treatment systems at TMl-1 during the year of 2017.

l' Exelon *Generationill April 30, 2018 TMl-18-025 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 THREE MILE ISLAND NUCLEAR STATION UNIT 1 AND UNIT 2 RENEWED OPERATING LICENSE NO. DPR-50 AND POSSESSION ONLY LICENSE NO. DPR 73 DOCKET NOS. 50-289 AND 50-320

SUBJECT:

COMBINED 2017 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT The 2017 Annual Radioactive Effluent Release Reports required by TMl-1 Technical Specification 6.9.4.1, TMl-2 Technical Specifications 6.8.1.2, and 6.12, and the Off-Site Dose Calculation Manual Part 4, Section 2.1, is enclosed. contains a summary of the quantities of radioactive liquid and gaseous effluents released from the site as outlined in Reg. Guide 1.21, Rev. 1, with data summarized on a quarterly basis following the format of Appendix B thereof. contains information for each type of solid waste shipped offsite during the report period including the container volume, total curie quantity, principal radionuclides and type of waste. includes a summary of unplanned releases from the site to unrestricted areas of radioa.ctive materials in gaseous and liquid effluents made during the reporting period. describes any changes made during 2017 to the Process Control Program (PCP) documents or to the Offsite Dose Calculation Manual (ODCM) and a listing of new locations for dose calculations and/or environmental monitoring identified by the land use census pursuant to Part 3, Section 8.2, of the ODCM. reports all instrumentation not returned to operable status within 30 days per the TMI ODCM Part 1, Sections 2.1.1.b and 2.1.2.b, and Part 2, Section 2.1.2.b.

2017 Annual Radioactive Effluent Release Report for TMI Page 2 of 3 TMl-18-025 is quarterly summaries of hourly meteorological data collected for 2017 in the form of joint frequency distribution of wind speed, wind direction and atmospheric stability. is an assessment of the radiation doses due to the radioactive liquid and gaseous effluents released from the respective unit during 2017. is an assessment of the radiation doses from the radioactive liquid and gaseous effluents to members of the public due to their activities inside the site boundary during 2017. is an assessment of the radiation doses to the most likely exposed real individual from reactor releases and other nearby uranium fuel cycle sources including doses from primary effluent pathways and direct radiation for 2017. 0 is a summation of deviations from the sampling and analysis regime specified in the ODCM for TMl-1 and TMl-2. 1 is a summary of Major Changes to Radioactive Waste Treatment Systems IAW FSAR Section 11.2.6. is a copy of the "TMI Offsite Dose Calculation Manual (ODCM)", CY-TM-170-300, Revision 5, which was approved during 2017 and issued on December 8, 2017. There was one revision made to the ODCM during 2017.

2017 Annual Radioactive Effluent Release Report for TMI Page 3 of 3 TMl-18-025 is a copy of the TMI Process Control Program, RW-AA-100 Revision 12, which was issued on September 30, 2017.

Please contact Dani Brookhart at 717-948-8017 if you have any questions concerning this report.

Respectfully,

~~

Joseph A. Dullinger Plant Manager (acting), Three Mile Island Unit 1 Exelon Generation Co., LLC JAD/DLB/dam Attachments/Enclosures cc: Regional Administrator, NRC Region I NRC Senior Resident Inspector-Three Mile Island Nuclear Station, Unit 1 NRC Project Manager, NRR -Three Mile Island Nuclear Station, Unit 1 NRC Project Manager, NRR -Three Mile Island Nuclear Station, Unit 2 R. R. Janati, Commonwealth of Pennsylvania S. L. Martin, PA Department of Environmental Protection, Bureau of Radiation Protection GPU Nuclear Cognizant Officer

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 17 Summary of Radioactive Liquid and Gaseous Effluents Released from TMI during 2017 0

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 17 TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES TMl-1 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. FISSION AND ACTIVATION GASES

1. Total Release Ci 5.31 E-01 1.98E-01 1.13E+01 7.06E+01 25%

2. Avg release rate for period µCi/S 6.83E-02 2.52E-02 1.42E+OO 8.BBE-02

3. Percent of aoolicable limit % * * *

B. IODINES

1. Total Iodine 1131 Ci <LLD <LLD 2.68E-05 5.37E-05 25%

2. Ava Release Rate for Period µCi/S N/A N/A 3.37E-06 6.75E-06

3. Percent of aoolicable limit % * * *

C. PARTICULATES

1. Part With half-life >8 davs Ci <LLD <LLD <LLD <LLD 25%

2. Ava Release Rate for Period µCi/S N/A N/A N/A N/A

3. Percent of aoolicable limit % * * *

D. TRITIUM

1. Total Release Ci 2.04E+01 1.69E+01 2.58E+01 3.68E+01 15%

2. Ava Release Rate for Period µCi/S 2.62E+OO 2.15E+OO 3.25E+OO 4.63E+OO

3. Percent of aoolicable limit % * * *

E. GROSS ALPHA

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

2. Avg release rate for period µCi/S N/A N/A NIA N/A

3. Percent of aoolicable limit uCi/S * * *

F. CARBON14

1. Total Release Ci 2.23E+OO 2.18E+OO 1.47E+OO 2.47E+OO **

2. Ava release rate for oeriod uCi/S 2.86E-01 2.77E-01 1.85E-01 3.11E-01

3. Percent of aoolicable limit µCi/S * * *

Note: Table 3 contains a listing of TMI ODCM Lower L1m1t of Detection (LLD)

ODCM Limits - Listed on Dose Summary Table

- C-14 production was estimated using EPRI Technical Report 1021106 Methodology.

2017Annual Radioactive Effluent Release Report for TMI Page 3 of 17 TABLE 18 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT GASEOUS EFFLUENTS - GROUND-LEVEL RELEASES - BATCH MODE TMl-1 Fission And Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Gasses Ar-41 Ci <LLD <LLD 1.38E-03 <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD 3.78E-03 <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A 5.16E-03 N/A Radioiodines Units Quarter 1 Quarter2 Quarter3 Quarter4 1-131 Ci <LLD <LLD <LLD <LLD 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Particulates Units Quarter 1 Quarter2 Quarter3 Quarter4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter2 Quarter3 Quarter4 H3 Ci 3.40E-05 <LLD 4.04E-03 <LLD Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD}.

2017Annual Radioactive Effluent Release Report for TMI Page 4 of 17 TABLE 18 (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - GROUND-LEVEL RELEASES -

CONTINUOUS MODE TMl-1 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Gasses Ar-41 Ci <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter4 1-131 Ci <LLD <LLD 1.89E-06 1.16E-07 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD 6.51E-07 <LLD Total Ci N/A N/A 2.54E-06 1.16E-07 Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Ni-63 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Nb-95 Ci -;:LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter4 H3 Ci 2.75E-04 1.49E-02 3.76E+OO 6.45E-02 Carbon 14 Units Quarter 1 Quarter 2 Quarter 3 Quarter4 C-14 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017Annual Radioactive Effluent Release Report for TMI Page 5 of 17 TABLE 1D EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE Fission And Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Gasses Ar-41 Ci <LLD 3.45E-03 1.55E-OO 1.36E-02 Kr-85 Ci 4.93E-01 1.77E-01 2.04E-01 1.27E-01 Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-131m Ci 5.80E-03 1.19E-03 1.94E-03 5.17E-03 Xe-133 Ci 3.17E-02 1.57E-03 9.29E-OO 5.60E-01 Xe-133m Ci <LLD <LLD 3.98E-02 3.68E-05 Xe-135 Ci <LLD <LLD 1.67E-01 7.43E-06 Xe-135m Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci 5.31 E-01 1.98E-01 1.21 E+01 7.06E-01 Radioiodines Units Quarter 1 Quarter2 Quarter3 Quarter4 1-131 Ci <LLD <LLD 4.08E-06 4.88E-01 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A 4.08E-06 4.88E-01 Particulates Units Quarter 1 Quarter2 Quarter3 Quarter4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter2 Quarter3 Quarter4 H3 Ci 8.48E-04 2.26E-02 9.40E+OO 6.54E-01 Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release Report for TMI - Page 6 of 17 TABLE 1D (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES

CONTINUOUS MODE TMl-1 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Gasses Ar-41 Ci <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci NIA NIA NIA NIA Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 1-131 Ci <LLD <LLD 2.02E-05 4.74E-06 1-132 Ci <LLD <LLD <LLD <LLD 1-133 Ci <LLD <LLD <LLD <LLD Total Ci NIA NIA 2.02E-05 -4.74E-06 Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Ni-63 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci NIA NIA NIA NIA Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter4 H3 Ci 2.04E+01 1.69E+01 1.26E+01 3.61E+01 Carbon 14 Units Quarter 1 Quarter 2 Quarter 3 Quarter4 C-14 Ci 2.23E+OO 2.18E+OO 1.47E+OO 2.47E+OO Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017Annual Radioactive Effluent Release ReportforTMI Page 7 of 17 TABLE 2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES TMl-1 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. Fission and Activation Products

1. Total Release(Not incl.

Tritium,gases,alpha) Ci 5.05E-05 6.70E-05 1.36E-04 2.19E-04 25%

2. Avq diluted concentration durinq period uCi/ml 7.79E-12 1.10E-11 1.97E-11 3.26E-11

3. Percent of aoolicable limit % * * *

B. Tritium

1. Total Release Ci 1.33E+02 7.45E+01 7.95E+01 5.29E+01 25%

2. Avq diluted concentration durinq period uCi/ml 2.05E-05 1.23E-05 1.15E-05 7.88E-06 1.30E-05

3. Percent of applicable limit % * * *

C. Dissolved and Entrained Gases

1. Total Release Ci 2.17E-05 1.42E-05 2.40E-05 <LLD 15%

2. Avo. diluted concentration durinP. period uCi/ml 3.34E-12 2.33E-12 3.47E-12 O.OOE+OO 2.28E-12

3. Period of applicable limit % * * *

D. Gross Aloha Activitv

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

E. VOLUME OF WASTE RELEASE LITERS 9.44E+07 9.79E+07 1.04E+08 1.07E+08 10%

(PRIOR TO DILUTION F. VOLUME OF DILUTION WATER USED LITERS 6.49E+09 6.08E+09 6.91 E+09 6.71E+09 10%

2017 Annual Radioactive Effluent Release ReportforTMI - Page 8 of 17 TABLE 28 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - BATCH MODE TMla1 Fission and Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Products H-3 Ci 1.33E+02 7.45E+01 7.94E+01 5.28E+01 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci 8.90E-07 <LLD <LLD 3.09e-06 Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci 2.47E-05 5.42E-06 7.23E-05 5.42E-05 Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD 1.34E-06 Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci 2.50E-05 6.16E-05 6.38E-05 1.60E-04 Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci 1.33E+02 7.45E+01 7.94E+01 5.28E+01 Dissolved and Units Quarter 1 Quarter2 Quarter3 Quarter4 Entrained Gases Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci 2.17E-05 1.42E-05 2.40E-05 <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Total Ci 2.17E-05 1.42E-05 2.40E-05 N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release ReportforTMI - Page 9 of 17 TABLE 28 (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - CONTINUOUS MODE TMl-1 Fission and Units Quarter 1 Quarter2 Quarter3 Quarter4 Activation Products H-3 Ci 1.31E-02 1.02E-02 3.41 E-02 2.87E-02 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci 1.31E-02 1.02E-02 3.41E-02 2.87E-02 Dissolved and Units Quarter 1 Quarter2 Quarter3 Quarter4 Entrained Gases Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD e-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release Report for TMI - Page 10 of 17 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 SUPPLEMENTAL INFORMATION FACILITY: TMI UNIT 1 LICENSE: DPR 50-289

1. Regulatory Limits -- Please refer to TMI Offsite Dose Calculation Manual A. Fission and Activation Gases:

B. Iodines:

C. Particulates, Half-Lives > 8 Days:

D. Liquid Effluents:

2. Maximum Effluent Concentrations -- 10 Times CFR 20, Appendix B Table II Provide the maximum effluent concentrations used in determining allowable release rates or concentrations A. Fission and Activation Gases:

B. Iodines:

C. Particulates, Half-Lives > 8 Days:

D. Liquid Effluents:

3. Average Energy Provide the average energy (E-BAR) of the radionuclide mixture in releases of fission and activation gases, if applicable NIA

4. Measurements and Approximations of Total Radioactivity Provide the methods to measure or approximate the total radioactivity in effluents and the methods used to determine radionuclide composition:

A. Fission and Activ. Gases: HPGE Spectrometry, Liquid Scintillation B. Iodines: HPGE Spectrometry C. Particulates: HPGE Spectrometry, Gas Flow Proportional, Beta Spectrometry D. Liquid Effluents: HPGE Spectrometry, Liquid Scintillation E. Gross Alpha Gas Flow Proportional F. Carbon 14 Estimated using the methodology included in the EPRI Technical Report 1021106.

5. Batch Releases Provide the following information relating to batch releases of radioactive materials in liquid and gaseous effluents.

Quarter 1 Quarter 2 Quarter 3 Quarter4 A. LIQUID IALL TIMES IN MINUTES}

1. Number of batch releases 39 13 37 43

2. Total time period for batch releases (min) 10500 4090 13000 12600

3. Maximum time period for a batch release (min) 760 695 970 860

4. Average time period for a batch release (min) 268 314 352 292

5. Minimum time period for a batch release (min) 203 205 195 1

6. Average stream flow during periods of release of 3.29E+06 3.21E+06 1.66E+06 1.36E+06 effluent into a flowinq stream (cfml

8. GASEOUS

1. Number of batch releases 7 7 22 13

2. Total time period for batch releases (min) 4690 4580 32100 10100

3. Maximum time period for a batch release (min) 818 793 10100 1560

4. Average time period for a batch release (min) 670 655 1460 776

5. Minimum time period for a batch release (min\ 33 6 1 8

6. Abnormal Releases Quarter 1 Quarter 2 Quarter 3 Quarter4 A. LIQUID

1. Number of releases 3 3 3 3

2. Total activity released (curies) 2.72E-03 2.75E-03 2.78E-03 2.78E-03

8. GASEOUS

1. Number of releases 0 0 1 0

2. Total activitv released (curies\ 0 0 9.19E-03 0

2017 Annual Radioactive Effluent Release Report for TMI Attachment 1 - Page 11 of 17 TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES TMl-2 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. FISSION AND ACTIVATION GASES

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

2. Avg release rate for period µCilS NIA NIA NIA NIA

3. Percent of aoolicable limit % * * *

B. IODINES

1. Total Iodine 1131 Ci NIA NIA NIA NIA 25%

2. AvQ release rate for period µCilS NIA NIA NIA NIA

3. Percent of applicable limit % * * *

C. PARTICULATES

1. Part. With half-life >8 davs Ci <LLD <LLD <LLD <LLD 25%

2. AvQ release rate for period uCilS NIA NIA NIA NIA

3. Percent of applicable limit % * * * *

4. Gross aloha radioactivitv Ci <LLD <LLD <LLD <LLD D. TRITIUM

1. Total Release Ci 1.16E-01 1.08E-02 3.14E-02 1.49E-02 25%

2. AvQ release rate for period uCilS 1.50E-02 1.38E-03 3.95E-03 1.87E-03

3. Percent of applicable limit % * * *

Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

ODCM Limits - Listed on Dose summary Table

2017 Annual Radioactive Effluent Release Report for TMI - Page 12 of 17 TABLE 1D EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE TMl-2 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Gasses Ar-41 Ci N/A N/A N/A N/A Kr-85 Ci N/A N/A N/A N/A Kr-85m Ci N/A N/A N/A N/A Kr-87 Ci N/A N/A N/A N/A Kr-88 Ci N/A N/A N/A N/A Xe-133 Ci N/A N/A N/A N/A Xe-135 Ci N/A N/A N/A N/A Xe-135m Ci N/A N/A N/A N/A Xe-138 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter4 1-131 Ci N/A N/A N/A N/A 1-133 Ci N/A N/A N/A N/A 1-135 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Cr-51 Ci N/A N/A N/A N/A Mn-54 Ci N/A N/A N/A N/A Co-58 Ci N/A N/A N/A N/A Fe-59 Ci N/A N/A N/A N/A Co-60 Ci N/A N/A N/A N/A Sr-89 Ci N/A N/A N/A N/A Sr-90 Ci N/A N/A N/A N/A Mo-99 Ci N/A N/A N/A N/A Aq-110m Ci N/A N/A N/A N/A Cs-134 Ci N/A N/A N/A N/A Cs-137 Ci N/A N/A N/A N/A Ba-140 Ci N/A N/A N/A N/A La-140 Ci N/A N/A N/A N/A Ce-141 Ci N/A N/A N/A N/A Ce-144 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 H3 Ci N/A N/A N/A N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

2017 Annual Radioactive Effluent Release Report for TMI - Page 13 of 17 TABLE 1 D (CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE TMl-2 Fission And Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Activation Gasses Ar-41 Ci <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Radioiodines Units Quarter 1 Quarter 2 Quarter 3 Quarter4 1-131 Ci N/A N/A N/A N/A 1-133 Ci N/A N/A N/A N/A 1-135 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Particulates Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD AQ-110m Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci N/A N/A N/A N/A Tritium Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 H3 Ci 1.16E-01 1.08E-02 3.14E-02 1.49E-02 Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

i I

2017 Annual Radioactive Effluent Release Report for TMI Attachment 1- Page 14 of 17 TABLE2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES TMl-2 EST TOTAL UNIT QUARTER 1 QUARTER2 QUARTER3 QUARTER4 ERROR%

A. FISSION AND ACTIVATION PRODUCTS

1. Total Release (Not incl. Tritium, Qases, alpha) Ci 1.26E-06 4.92E-06 4.90E-06 1.57E-06 25%

2. AvQ diluted concentration during period uCi/ml 1.65E-09 2.52E-11 3.41E-10 6.94E-12

3. Percent of applicable limit % * * *

B. TRITIUM

1. Total Release Ci <LLD 6.64E-06 2.73E-06 <LLD 25%

2. AvQ diluted concentration durinQ period µCi/ml N/A 1.46E-10 3.00E-11 N/A

3. Percent of applicable limit % * * *

C. DISSOLVED AND ENTRAINED GASES

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

2. AvQ diluted concentration durinQ period µCi/ml NIA N/A N/A N/A

3. Percent of applicable limit % * * *

D. GROSS ALPHA RADIOACTIVITY

1. Total Release Ci <LLD <LLD <LLD <LLD 25%

E. VOLUME OF WASTE RELEASE {PRIOR TO LITERS 1.21E+03 2.57E+05 1.99E+04 2.05E+05 10%

DILUTION\

F. VOLUME OF DILUTION WATER USED LITERS 7.62E+05 1.95E+08 1.44E+07 2.26E+08 10%

Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

ODCM Limits - Listed on Dose summary Table

2017 Annual Radioactive Effluent Release Report for TMI - Page 15 of 17 TABLE 28 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - BATCH MODE TMl-2 Fission and Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Products H-3 Ci <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ao-110m Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci 1.26E-06 4.92E-06 4.90E-06 1.57E-06 Ba-140 Ci <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Total Ci 1.26E-06 4.92E-06 4.90E-06 1.57E-06 Dissolved and Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Entrained Gases Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Total Ci NIA N/A N/A N/A Note: Table 3 contains a listing of TMI ODCM Lower Limit of Detection (LLD).

_ ___J

2017 Annual Radioactive Effluent Release Report for TMI - Page 16 of 17 TABLE 2B(CONTINUED)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2017 LIQUID EFFLUENTS - CONTINUOUS MODE TMlm2 Fission and Units Quarter 1 Quarter 2 Quarter 3 Quarter4 Activation Products H-3 Ci N/A N/A N/A N/A Cr-51 Ci N/A N/A N/A N/A Mn-54 Ci N/A N/A N/A N/A Fe-55 Ci N/A N/A N/A N/A Co-58 Ci N/A N/A N/A N/A Fe-59 Ci N/A N/A N/A N/A Co-60 Ci N/A N/A N/A N/A Zn-65 Ci N/A N/A N/A N/A Sr-89 Ci N/A N/A N/A N/A Sr-90 Ci N/A N/A N/A N/A Zr-95 Ci N/A N/A N/A N/A Nb-95 Ci N/A N/A N/A N/A Mo-99 Ci N/A N/A N/A N/A Tc-99m Ci N/A N/A N/A N/A Ag-110m Ci N/A N/A N/A N/A 1-131 Ci N/A N/A N/A N/A Cs-134 Ci N/A N/A N/A N/A Cs-137 Ci N/A N/A N/A N/A Ba-140 Ci N/A N/A N/A N/A La-140 Ci N/A N/A N/A N/A Ce-141 Ci N/A N/A N/A N/A Ce-144 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A Dissolved and Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Entrained Gases Kr-87 Ci N/A N/A N/A N/A Kr-88 Ci N/A N/A N/A N/A Xe-133 Ci N/A N/A N/A N/A Xe-133m Ci N/A N/A N/A N/A Xe-135 Ci N/A N/A N/A N/A Total Ci N/A N/A N/A N/A

2017 Annual Radioactive Effluent Release Report for TMI - Page 17 of 17 TABLE 3 ODCM REQUIRED LOWER LIMIT OF DETECTION (LLD)

Gaseous Sampling Radioisotope: LLD Value Tritium 1E-06 µCi/ml Principal Gamma Emitters Gas (Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135 1E-04 uCi/ml Principal Gamma Emitters Particulate Mn-54 1E-11 µCi/ml Fe-59 1E-11 uCi/ml Co-58 1E-11 µCi/ml Co-60 1E-11 uCi/ml Zn-65 1E-11 uCi/ml Mo-99 1E-11 µCi/ml Cs-137 1E-11 uCi/ml Ce-141 1E-11 uCi/ml Ce-144 1E-11 µCi/ml Iodine 131 1E-12 uCi/ml Gross Alpha 1E-11 uCi/ml Sr-89 1E-11 uCi/ml Sr-90 1E-11 uCi/ml Liquid Sampling Radioisotope: LLD Value Tritium 1E-05 µCi/ml Principal Gamma Emitters Mn-54 5E-07 uCi/ml Fe-59 5E-07 uCi/ml Co-58 5E-07 uCi/ml Co-60 5E-07 µCi/ml Zn-65 5E-07 µCi/ml Mo-99 5E-07 uCi/ml Cs-134 5E-07 µCi/ml Cs-137 5E-07 uCi/ml Ce-141 5E-07 uCi/ml Ce-144 5E-07 µCi/ml Iodine 131 1E-06 uCi/ml Dissolved and Entrained Gases Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135) 1E-05 µCi/ml Fe-55 1E-06 uCi/ml Gross Alpha 1E-07 uCi/ml Sr-89 5E-08 µCi/ml Sr-90 5E-08 µCi/ml

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 4 Solid Waste Shipped Offsite During 2017

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 4 2017 Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments TMl-1 A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Total Est.

Types of Waste Quantity Activity Period Total (m3) (Ci) Error%

a. Spent resins, filter sludges, evaporator bottoms, 9.22E+01 3.40E+02 01/01/17- +/- 25%

etc. 12/31/17

b. Dry compressible waste, contaminated equip, etc. 3.94E+02 3.SSE-01 01/01/17- +/-25%

12/31/17

c. Irradiated components, control rods, etc. 2.79E-02 4.13E-01 01/01/17- +/- 25%

12/31/17

d. Other (describe) O.OOE+OO O.OOE+OO 01/01/17- +/- 25%

12/31/17

2. Estimate of major nuclide composition (by waste type)

Ma"or Nuclide Com osition %

a. Co-60 55.00%

Ni-63 23.91%

b. Co-60 39.99%

Ni-63 21.59%

Cs-137 17.96%

c Co-60 63.69%

Fe-55 18.03%

d. None

2017 Annual Radioactive Effluent Release Report for TMI - Page 3 of 4 2017 Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments TMlm1

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 28 Hittman Transport Services Energy Solutions LLC 1560 Bear Creek Rd 1 Landstar Ranger Inc. Energy Solutions 1560 Bear Creek Rd 3 Hittman Transport Services Energy Solution Clive Disposal Site, Utah 1 Hittman Transport Services Waste Control Specialists LLC Andrews Texas B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination None None None C. Changes to the Process Control Program RW-AA-100: PROCESS CONTROL PROGRAM FOR RADIOACTIVE WASTES was revised 9/30/17 to remove references to Fort Calhoun and add references to Fitzpatrick. No functional change for TMI.

2017 Annual Radioactive Effluent Release Report for TMI Attachment 2 - Page 4 of 4 2017 Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments TMl-2 A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Total Est.

Types of Waste Quantity Activity Period Total (ma) (Ci) Error%

a. Spent resins, filter sludges, evaporator bottoms, O.OOE+OO O.OOE+OO 01/01/17- +/-25%

etc. 12/31/17

b. Dry compressible waste, contaminated equip, O.OOE+OO O.OOE+OO 01/01/17- +/-25%

etc. 12/31/17 C. Irradiated components, control rods, etc. O.OOE+OO O.OOE+OO 01/01/17- +/- 25%

12/31/17

d. Other (describe) radwaste system sump excess 2.65E+01 2.02E+OO 01/01/17- +/- 25%

water from rain intrusion 12/31/17

2. Estimate of major nuclide composition (by waste type)

Major Nuclide Comoosition %

a. None

b. None C. None

d. Cs-137 85.97%

Sr-90 13.09%

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 2 Hittman Transport Services Energy Solutions LLC 1560 Bear Creek Rd.

B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination None None None L_

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 Summary of Unplanned Releases from the TMI Site During 2017 There were no unplanned releases from TMl-2 in 2017. The unplanned releases for TMl-1 are summarized in the supplemental information in Attachment 1. The information is reported separately for liquid and gaseous releases, and the number of releases is reported for each quarter with a total curies released. The activity for these releases is also included in Tables 2A and 28.

The abnormal liquid releases are monthly releases to account for the tritium in groundwater released into the river. There was one unplanned gaseous release for TMl-1, captured in IR 04049166. This release occurred when both containment doors were open at the same time, for less than one minute.

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 CHANGES TO THE PROCESS CONTROL PROGRAM AND THE OFFSITE DOSE CALCULATION MANUAL DURING 2017 AND A LISTING OF NEW LOCATIONS FOR DOSE CALCULATIONS AND/OR ENVIRONMENTAL MONITORING IDENTIFIED BY THE LAND USE CENSUS

1. Changes to the Process Control Program There were minor changes to the TMI Process Control Program, RW-M-100 Rev. 12 issued on 9/30/17, did not make a change to TMl's PCP.

2. Changes to the Offsite Dose Calculation Manual There was one change to the Offsite Dose Calculation Manual approved in 2017. The procedure change is attached in Enclosure 1.

3. A listing of new locations for dose calculations and/or environmental monitoring identified by the Land Use Census.

Based on the results of the 2017 Land Use Census, no changes were required to the Radiological Environmental Monitoring Program. The Land Use Census identified minor changes to the closest resident in Sectors A (N), and B (NNE). The satellite imagery indicated that the residents in these sectors are closer to the plant than previously reported.

Other minor changes occurred with gardens in Sectors L(SW) and N(W). A new garden in Sector L was identified farther than the plant that is closer to the 500 sq. ft. requirement than the current garden in that sector. The home in Sector N is under new ownership, but there is still a garden at that residence.

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 1 Instrumentation Not Returned to Operable Status Within 30 Days During 2017 There were no instruments not returned to operable status within 30 days per the TMI ODCM Part 1, Sections 2.1.1.b and 2.1.2.b, and Part 2, Section 2.1.2.b, during 2017.

2017 Annual Radioactive Effluent Release Report for TMI - Page 1 of 17 Annual Summary of Hourly Meteorological Data for The osprey did return and nest on the TMI meteorological tower. However, the station was able to calibrate the sensors and instrumentation before and after the osprey nested. The percent data recovery for meteorological information for 2017 was 99.9 percent. The data is presented by quarter.

2017 Annual Radioactive Effluent Release Report for TMI - Page 2 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Extremely Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 0 3 0 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 0 0 0 0 0 ESE 1 0 2 0 0 0 3 SE 0 1 0 0 0 0 1 SSE 0 1 1 0 0 0 2 s 0 1 0 1 0 0 2 SSW 0 0 7 2 0 0 9 SW 0 0 0 2 0 0 2 WSW 0 1 0 0 0 0 1 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 3 2 0 0 0 0 5 NNW 0 5 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 4 14 10 5 2 0 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing siability measurements in all stability classes: 0 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Moderately Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 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 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 2 2 0 0 0 4 SE 0 2 0 0 0 0 2 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 3 1 0 0 0 4 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 1 1 0 0 2 WNW 0 o* 0 2 1 0 3 NW 0 0 0 2 0 0 2 NNW 0 0 1 0 1 1 3 Variable 0 0 0 0 0 0 0 Total 1 7 5 5 2 21 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

2017 Annual Radioactive Effluent Release Report for TMI - Page 3 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Slightly Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19- 24 >24 Total N 0 0 1 0 0 0 1 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 2 0 1 0 0 3 SE 0 3 0 0 0 0 3 SSE 0 2 0 0 0 0 2 s 0 1 2 1 0 0 4 SSW 0 0 1 0 0 0 1 SW 0 1 0 0 0 0 1 WSW 0 0 0 0 0 0 0 w 0 2 3 0 0 0 5 WNW 0 1 0 1 3 0 5 NW 0 1 1 4 3 3 9 NNW 0 0 1 0 4 3 8 Variable 0 0 0 0 0 0 0 Total 0 13 9 7 10 3 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 ciasses: 0 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Neutral - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19 - 24 > 24 Total N 3 11 29 11 0 0 54 NNE 2 12 2 0 0 0 16 NE 4 12 6 0 0 0 22 ENE 7 14 12 1 0 0 34 E 18 6 23 12 0 0 59 ESE 4 19 40 9 0 0 72 SE 6 18 4 0 0 0 28 SSE 5 13 5 0 0 0 23 s 3 14 13 2 0 0 32 SSW 4 12 12 1 0 0 29 SW 3 16 9 2 1 0 31 WSW 2 12 10 9 5 0 38 w 1 22 55 47 11 2 138 WNW 3 13 67 109 44 2 238 NW 3 12 50 58 50 6 179 NNW 4 20 27 17 5 0 73 Variable 0 0 0 0 0 0 0 Total 72 226 364 278 116 10 1066 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

2017 Annual Radioactive Effluent Release Report for TMI - Page 4 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Slightly Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 24 38 6 6 0 0 74 NNE 13 20 1 0 0 0 34 NE 20 13 4 0 0 0 37 ENE 10 14 1 0 0 0 25 E 13 18 5 1 0 0 37 ESE 7 15 1 0 0 0 23 SE 6 6 0 0 0 0 12 SSE 5 13 2 0 0 0 20 s 4 27 9 6 0 0 46 SSW 10 12 28 8 0 0 58 SW 8 10 16 5 0 0 39 WSW 10 14 4 6 0 0 34 w 9 20 14 5 3 0 51 WNW 16 17 19 3 3 2 60 NW 15 15 38 19 0 0 87 NNW 28 30 12 10 1 0 81 Variable 0 0 0 0 0 0 0 Total 198 282 160 69 7 2 718 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Moderately Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 11 5 0 0 0 0 16 NNE 3 3 0 0 0 0 6 NE 7 2 0 0 0 0 9 ENE 4 3 0 0 0 0 7 E 8 6 0 0 0 0 14 ESE 8 2 0 0 0 0 10 SE 9 1 0 0 0 0 10 SSE 8 5 0 0 0 0 13 s 12 6 0 0 0 0 18 SSW 2 8 2 1 0 0 13 SW 7 6 1 0 0 0 14 WSW 6 3 1 0 0 0 10 w 1 4 3 0 0 0 8 WNW 8 2 1 0 0 0 11 NW 5 3 2 1 0 0 11 NNW 7 4 6 1 0 0 18 Variable 0 0 0 0 0 0 0 Total 106 63 16 3 0 0 188 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

2017 Annual Radioactive Effluent Release Report for TMI - Page 5 of 17 Three Mile Island Alpha Period of Record: January - March 2017 Stability Class - Extremely Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 -24 > 24 Total N 3 1 1 0 0 0 5 NNE 6 2 0 0 0 0 8 NE 3 0 0 0 0 0 3 ENE 5 0 0 0 0 0 5 E 5 0 0 0 0 0 5 ESE 8 1 0 0 0 0 9 SE 4 0 0 0 0 0 4 SSE 5 2 0 0 0 0 7 s 2 2 0 0 0 0 4 SSW 2 2 0 0 0 0 4 SW 2 3 0 0 0 0 5 WSW 5 1 0 0 0 0 6 w 1 3 0 0 0 0 4 WNW 2 3 1 0 0 0 6 NW 1 2 0 0 0 0 3 NNW 4 4 0 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 58 26 2 0 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: 0

2017 Annual Radioactive Effluent Release Report for TMI - Page 6 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Extremely Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 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 0 0 0 0 0 ESE 0 1 1 0 0 0 2 SE 0 1 6 5 0 0 12 SSE 0 0 1 0 0 0 1 s 0 0 6 0 0 0 6 SSW 0 1 10 1 1 0 13 SW 2 1 2 0 0 0 5 WSW 2 0 1 0 0 0 3 w 0 4 0 0 0 0 4 WNW 0 4 0 0 0 0 4 NW 1 5 1 0 0 0 7 NNW 1 4 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 6 23 28 6 0 64 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: 4 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Moderately Unstable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1...:.1 4-7 8 -12 13 - 18 19 -24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 2 0 0 0 0 2 E 0 2 0 0 0 0 2 ESE 0 5 4 0 0 0 9 SE 0 1 3 1 0 0 5 SSE 0 1 0 0 0 0 1 s 0 1 2 2 0 0 5 SSW 0 3 3 0 2 0 8 SW 0 2 1 0 0 0 3 WSW 0 0 1 0 0 0 1 w 1 1 3 0 0 0 5 WNW 0 0 0 0 0 0 0 NW 2 4 3 0 0 0 9 NNW 0 1 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 3 24 21 3 2 0 53 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 7 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Slightly Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction ~ 4-7 8 -12 13 - 18 19 -24 >24 Total N 0 2 0 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 2 0 0 0 0 2 ENE 0 2 0 0 0 0 2 E 0 1 0 0 0 0 1 ESE 0 1 4 0 0 0 5 SE 0 3 8 1 0 0 12 SSE 0 0 0 0 0 0 0 s 1 2 1 1 1 0 6 SSW 0 0 2 1 0 0 3 SW 0 2 1 0 0 0 3 WSW 0 0 7 1 2 0 10 w 0 3 4 0 0 0 7 WNW 1 1 3 0 0 0 5 NW 0 3 4 0 0 0 7 NNW 1 4 3 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 3 26 37 4 3 0 73 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: 4 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Neutral -145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 - 12 13 - 18 19-24 > 24 Total N 8 19 15 0 0 0 42 NNE 5 21 2 0 0 0 28 NE 12 14 12 0 0 0 38 ENE 9 36 9 0 0 0 54 E 5 56 38 4 0 0 103 ESE 3 38 72 15 0 0 128 SE 6 26 39 8 0 0 79 SSE 4 14 10 0 0 0 28 s 6 22 19 7 0 0 54 SSW 9 34 28 7 1 0 79 SW 4 27 30 4 0 0 65 WSW 6 13 26 2 1 0 48 w 5 16 45 23 0 0 89 WNW 10 10 45 23 8 0 96 NW 17 17 49 45 1 0 129 NNW 11 26 13 7 0 0 57 Variable 0 0 0 0 0 0 0 Total 120 389 452 145 11 0 1117 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 8 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Slightly Stable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19-24 > 24 Total N 10 20 7 0 0 0 37 NNE 4 17 0 0 0 0 21 NE 8 6 0 0 0 0 14 ENE 7 13 1 0 0 0 21 E 17 12 1 0 0 0 30 ESE 8 10 3 0 0 0 21 SE 5 3 7 2 0 0 17 SSE 5 5 0 0 0 0 10 s 7 18 9 1 0 0 35 SSW 6 25 24 5 1 0 61 SW 16 22 16 1 0 0 55 WSW 22 20 10 5 3 0 60 w 17 30 9 2 2 0 60 WNW 14 19 16 6 3 0 58 NW 20 15 23 8 1 0 67 NNW 10 20 7 4 0 0 41 Variable 0 0 0 0 0 0 0 Total 176 255 133 34 10 0 608 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: 4 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Moderately Stable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction ~ 4-7 8 -12 13 - 18 19 -24 > 24 Total N 3 2 0 0 0 0 5 NNE 2 0 0 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 4 3 0 0 0 0 7 E 5 3 0 0 0 0 8 ESE 11 0 0 0 0 0 11 SE 3 0 0 0 0 0 3 SSE 11 1 0 0 0 0 12 s 8 1 0 0 0 0 9 SSW 10 6 0 0 0 0 16 SW 16 4 0 0 0 0 20 WSW 13 4 0 0 0 0 17 w 10 4 0 0 0 0 14 WNW 6 4 0 0 0 0 10 NW 8 4 0 0 0 0 12 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 115 37 0 0 0 0 152 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: 4

2017 Annual Radioactive Effluent Release Report for TMI - Page 9 of 17 Three Mile Island Alpha Period of Record: April - June 2017 Stability Class - Extremely Stable - 145Ft-31Ft Delta-T (F)

Winds Measured at 98 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8 -12 13 - 18 19 - 24 > 24 Total N 2 0 0 0 0 0 2 NNE 4 0 0 0 0 0 4 NE 2 0 0 0 0 0 2 ENE 4 0 0 0 0 0 4 E 3 1 0 0 0 0 4 ESE 5 1 0 0 0 0 6 SE 8 0 0 0 0 0 8 SSE 11 0 0 0 0 0 11 s 4 1 1 0 0 0 6 SSW 10 1 1 0 0 0 12 SW 7 1 0 0 0 0 8 WSW 5 3 0 0 0 0 8 w 10 8 0 0 0 0 18 WNW 7 0 0 0 0 0 7 NW 6 0 1 0 0 0 7 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 92 16 3 0 0 0 111 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: 4

2017 Annual Radioactive Effluent Release Report for TMI Attachment 6 - Page 10 of 17 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Extremely Unstable - 145Ft-31 Ft Delta-T (F)

Winds Measured at 98 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 2 5 0 0 0 7 SE 0 0 2 0 0 0 2 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 4 0 0 0 4 SW 0 2 1 0 0 0 3 WSW 0 2 0 0 0 0 2 w 0 0 0 0 0 0 0 WNW 5 1 0 0 0 0 6 NW 3 5 2 0 0 0 10 NNW 3 5 0 1 0 0 9 Variable 0 0 0 0 0 0 0 Total 11 17 14 0 0 43 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: 4 Three Mile Island Alpha Period of Record: July - September 2017 Stability Class - Moderately Unstable - 145Ft-31 Ft Delta-T (F)