ML19177A021

Annual Radioactive Effluent Release Report for January 1 Through December 31, 2018, Revision 1

ML19177A021
Person / Time
Site:	Pilgrim
Issue date:	06/24/2019
From:	Miner P Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
2.19.045
Download: ML19177A021 (80)

Text

• ~ Entergr. Entergy Nuclear Operations, Inc.

Pilgrim Nuclear Power Station 600 Rocky Hill Road Pl mouth, MA 02360 Peter J. Miner Manager, Regulatory Assurance 2.19.045 June 24, 2019 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Annual Radioactive Effluent Release Report for January 1 through December 31, 2018, Revision 1 Pilgrim Nuclear Power Station N RC Docket No. 50-293 Renewed Facility Operating License No. DPR-35

Reference:

1) Entergy Nuclear Operations, Inc. (Entergy) letter to U. S. Nuclear Regulatory Commission (NRC), "Annual Radioactive Effluent Release Report for January 1 through December 31, 2018" dated May 6, 2019 (ADAMS Accession No. ML19127A216)

On May 6, 2019, in accordance with Pilgrim Nuclear Power Station Technical Specification 5.6.3, Entergy Nuclear Operations, Inc. submitted the Annual Radioactive Effluent Release Report for January 1 through December 31, 2018 (Reference 1). Subsequently, it was identified that changes to the report were necessary. Accordingly, the report is being resubmitted in its entirety and supersedes Reference 1.

If you have any questions regarding this information, please contact me at (508) 830-7127.

This letter contains no new regulatory commitments.

Respectfully, Petfd~

PJM/pm

Enclosure:

Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report, Revision 1

2.19.045 Page 2 of 2 cc: NRG Region I, Regional Administrator NRG Senior Resident Inspector - Pilgrim NRG Project Manager - Pilgrim Mr. John Giarrusso, Jr. - Massachusetts Emergency Management Agency

Enclosure 2.19.045 Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report, Revision 1

PILGRIM NUCLEAR POWER STATION Facilit y Opera ting Licens e DPR-35 Annua l Radio active Efflue nt Release Repor t Janua ry 1 throug h Decem ber 31, 2018 Rev.01 e~*Entergy Page 1

---=--Entergy PILGRIM NUCL EAR POWE R STATION Facility Operating License DPR-35 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT JANU ARY 01 THRO UGH DECEMBER 31, 2018 L. Hagema n Senior HP/Che mistry Specialist Reviewed by:

L.

Radiation Protection Manage r

Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report January-December 2018 TABLE OF CONTENTS SECTION SECTION TITLE PAGE 1.0 EXECUTIVE

SUMMARY

5 2.0 RADIOACTIVE EFFLUENT DATA 8 2.1 Supplemental Effluent Release Data 8 2.2 Gaseous Effluent Data 8 2.3 Liquid Effluent Data 9 3.0 METEOROLOGICAL DATA 19 4.0 MAXIMUM INDIVIDUAL DOSES 20 4.1 Doses From Noble Gas Releases 20 4.2 Doses From Gaseous Effluent Releases 22 4.3 Doses From Liquid Effluent Releases 28 5.0 OFFSITE AMBIENT RADIATION MEASUREMENTS 34 6.0 PERCENT OF ODCM EFFLUENT CONTROL LIMITS 37 6.1 Gaseous Effluent Releases 37 6.2 Liquid Effluent Releases 40 7.0 RADIOACTIVE WASTE DISPOSAL DATA 43 8.0 OFFSITE DOSE CALCULATION MANUAL REVISIONS 45 9.0 PROCESS CONTROL PROGRAM REVISIONS 46

10.0 REFERENCES

47 APPENDIX A Meteorological Joint Frequency Distributions 48 APPENDIX 8 Onsite Groundwater Monitoring Program 69 APPENDIX C Corrections to Previous Effluent Reports 73 APPENDIX D Changes to PNPS Offsite Dose Calculation Manual 74 Page 3

Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Jan-Dec 2018 LIST OF TABLES TABLE TABLE TITLE PAGE 2.1 Supplemental Information 10 2.2-A Gaseous Effluents - Summation of All Releases 11 2.2-8 Gaseous Effluents - Elevated Releases 12 2.2-C Gaseous Effluents - Ground Level Releases 14 2.3-A Liquid Effluents - Summation of All Releases 16 2.3-8 Liquid Effluents 17 4.1 Maximum Doses from Noble Gas Releases During 2018 21 4.2-A Maximum Individual Organ Doses from Gaseous Effluents 23 Jan-Mar 2018 4.2-8 Maximum Individual Organ Doses from Gaseous Effluents 24 Apr-Jun 2018 4.2-C Maximum Individual Organ Doses from Gaseous Effluents 25 Jul-Sep 2018 4.2-D Maximum Individual Organ Doses from Gaseous Effluents 26 Oct-Dec 2018 4.2-E Maximum Individual Organ Doses from Gaseous Effluents 27 Jan-Dec 2018 4.3-A Maximum Individual Organ Doses from Liquid Effluents 29 Jan-Mar 2018 4.3-8 Maximum Individual Organ Doses from Liquid Effluents 30 Apr-Jun 2018 4.3-C Maximum Individual Organ Doses from Liquid Effluents 31 Jul-Sep 2018 4.3-D Maximum Individual Organ Doses from Liquid Effluents 32 Oct-Dec 2018 4.3-E Maximum Individual Organ Doses from Liquid Effluents 33 Jan-Dec 2018 5.0 Average TLD Exposures by Distance Zone During 2018 36 6.1 Percent of ODCM Effluent Control Limits for Gaseous Effluent 38 Releases During 2018 6.2 Percent of ODCM Effluent Control Limits for Liquid Effluent Releases 41 During 2018 7.0 Solid Waste and Irradiated Fuel Shipments 44 A-1 Joint Frequency Distribution of Wind Directions and Speeds for the 49 33-ft Level of the 220-ft Tower A-2 Joint Frequency Distribution of Wind Directions and Speeds for the 59 220-ft Level of the 220-ft Tower Page 4

PILGRIM NUCLEAR POWER STATION ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT JANUARY 01 THROUGH DECEMBER 31, 2018 1.0 EXECUTIVE

SUMMARY

INTRODUCTION This report quantifies the radioactive gaseous, liquid, and radwaste releases, and summarizes the local meteorological data for the period from January 01 through December 31, 2018. This document has been prepared in accordance with the requirements set forth in the Pilgrim Nuclear Power Station (PNPS) Technical Specifications and Revision 1 of Regulatory Guide 1.21, "Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Material in Liquid and Gaseous Effluents from Light Water Cooled Nuclear Power Plants". This document has been prepared in accordance with the requirements of PNPS Technical Specifications section 5.6.3.

The quantity of radioactive material released from PNPS was determined from sample analyses and continuous on-line monitoring of gaseous releases from the main stack, reactor building vent, turbine building, and various decontamination facilities, and liquid releases into the discharge canal.

The quantity and volume of radioactive waste shipped offsite from PNPS for processing and burial were determined from data contained on the radwaste shipping documentation. The meteorological data were obtained from monitoring instruments located on the 220-foot meteorological tower located at Pilgrim Station.

GASEOUS EFFLUENTS Gaseous radioactive releases for the reporting period are quantified in Tables 2.2-A, 2.2-B, and 2.2-C. Radioactive noble gases released during the period totaled 7.8 Curies. Releases of radioactive iodines and particulates with half-life of greater than 8 days totaled 0.00021 Curies, tritium releases totaled 34.0 Curies, and carbon-14 totaled 6.5 Curies. No gross alpha radioactivity was detected in gaseous effluents.

Noble gases released in gaseous effluents resulted in a maximum total body dose of 0.00055 mrem, with a corresponding skin dose of 0.0030 mrem. The release of radioactive particulates, iodines, tritium, and carbon-14 in gaseous effluents from PNPS during the reporting period resulted in a total body dose to the maximum-exposed hypothetical individual of approximately 0.014 mrem. The maximum hypothetical dose to any organ from radioactive particulates, iodines, tritium, and carbon-14 was approximately 0.065 mrem. The maximum, hypothetical total body dose from the combined release of all airborne radioactivity in gaseous effluents was 0.050 mrem.

The maximum individual doses from gaseous radioactive effluents were compared to the applicable ODCM dose limits. Noble gas doses were 0.0083% of the corresponding 10CFR50 dose objectives.

Maximum doses resulting from releases of particulates, iodines, tritium, and carbon-14 in gaseous effluents were less than 0.43% of corresponding 10CFR50 objectives.

Page 5

LIQUID EFFLUENTS Liquid radioactive releases for the reporting period are quantified in Tables 2.3-A and 2.3-B. Zero discharges of liquid effluents containing radioactivity occurred during the reporting period. The resulting maximum total body dose was 0.00 mrem, with a corresponding organ dose of 0.00 mrem.

All doses from liquid discharges were less than 0.00% of corresponding 10CFR50 objectives.

METEOROLOGICAL DATA Meteorological joint frequency distributions are listed in Appendix A. Data recovery for the entire annual period was 98% for the 33-ft and 96% for the 220-ft levels of the tower. The predominant wind direction was from the south-southwest, which occurred approximately 15% of the time during the reporting period. The predominant stability class was Class D, which occurred approximately 47% of the time during the reporting period OFFSITE AMBIENT RADIATION MEASUREMENTS Ambient rad iation exposure was evaluated to complete the assessment of radiological impact on humans. A sma ll number of thermoluminescent dosimeters (TLDs) indicated an elevation in ambient radiation exposure on Entergy property in close proximity to the station, when compared to background levels in the region. This elevation is due to nitrogen-16 contained within the plant steam system, as opposed to radioactive effluent released from the plant. The dose to the maximum-exposed member of the public at the PNPS Health Club, even though they are within the owner-controlled area, was estimated as being approximately 1.6 mrem during 2018. There was no measurable increase during 2018 in ambient radiation measurements at the location of the nearest resident 0.8 km southeast of PNPS.

COMBINED DOSE IMPACT The collective total body dose to a maximum-exposed hypothetical member of the public from airborne radioactivity, liquid-borne radioactivity, and ambient radiation exposure resulting from PNPS operation during 2018 was calculated as being approximately 0.71 mrem. This amount is approximately 0.12% of the typical dose of 620 mrem received each year by an average person from other sources of natural and man-made radiation. Although this calculated collective dose occurs to a maximum-exposed hypothetical individual, it is also well below the NRC dose limit of 100 mrem/yr specified in 10CFR20.1301, as well as the EPA dose limit of 25 mrem/yr specified in 40CFR190. Both of these limits are to be applied to real members of the general public, so the fact that the dose to the hypothetical maximum-exposed individual is within the limits ensures that any dose received by a real member of the public would be smaller and well within any applicable limit.

RADIOACTIVE SOLID WASTE DISPOSAL Solid radioactive wastes shipped offsite for processing and disposal during the reporting period are described in Table 7.0. A total of approximately 542 cubic meters of solid waste, containing 418 Curies of radioactivity, were shipped from the site during the reporting period.

Page6

ONSITE GROUNDWATER MONITORING PROGRAM In response to the Nuclear Energy Institute Groundwater Protection Initiative, Pilgrim Station instituted a groundwater monitoring program during 2007. Four monitoring wells were installed onsite during the fourth quarter of 2007, and the first samples were collected in late November 2007.

Additional sampling wells were added in 2010, 2011, 2012, 2013, and 2014. As of the end of 2018, samples are being collected from a total of 23 monitoring wells. Low levels of tritium, a radioactive isotope of hydrogen, were detected in several of these onsite wells. No other plant-related radioactivity was detected in the groundwater samples. The average concentration of tritium detected in these onsite monitoring wells during 2018 was well below the voluntary communications reporting level established by the EPA Drinking Water Standard of 20,000 pCi/L. Although the EPA Standard provides a standard for comparison, no drinking water sources are affected by this tritium.

The maximum hypothetical dose resulting from tritium in groundwater presumed to enter Cape Cod Bay is calculated to be 0.0000000048 mrem/yr. Results of the groundwater monitoring program are presented in Appendix B.

CONCLUSION The PNPS Offsite Dose Calculation Manual contains effluent controls to limit doses resulting from releases of radioactivity to the environment. None of the effluent controls associated with liquid or gaseous effluents were exceeded during the reporting period, as confirmed by conservative dose assessments performed at weekly and monthly intervals. Conformance to the PNPS ODCM effluent control limits ensures that releases of radioactivity in liquid and gaseous effluents are kept as low as reasonably achievable in accordance with 10 CFR Part 50, Appendix I. Compliance with the ODCM also demonstrates that requirements of the Environmental Protection Agency's nuclear fuel cycle standard, 40CFR 190.10, Subpart B, have been met. Based on the dose assessment results for 2018, there was no significant radiological impact on the general public from PNPS operation.

Page 7

2.0 RADIOACTIVE EFFLUENT DATA Radioactive gaseous and liquid releases for the reporting period are given in the standard format presented in Tables 1A, 18, 1C, 2A, 28, and Supplemental Information table from NRG Regulatory Guide 1.21 (Reference 1) format.

2.1 Supplemental Effluent Release Data Supplemental information related to radioactive gaseous and liquid releases for the reporting period are given in the standard NRC Regulatory Guide 1.21 format in Table 2.1.

2.2 Gaseous Effluent Data Gaseous radioactivity is released from Pilgrim Station to the atmosphere from the main stack, reactor building vent, turbine building, and various decontamination facilities . Combined gaseous effluent releases from all release points are summarized in Table 2.2-A. No alpha activity was detected on any of the particulate filters collected during the reporting period. The total gaseous releases for various categories of radionuclides , as well as the corresponding average release rates, can be summarized as follows :

• Noble gases: 7.80 Ci , 0.247 µCi/sec

• Iodines and particulates with 0.00165 Ci, 0.0000524 ~tCi/sec half-life greater than 8 days

• Tritium: 34.0 Ci, 1.08 ~tCi/sec

• Carbon-14: 6.52 Ci, 0.207 ~tCi/sec Effluent releases from the main stack are detailed in Table 2.2-B. The main stack is 335 feet tall, and represents an elevated release point with a total height of approximately 400 feet above sea level. The main stack is located approximately 700 feet west-northwest of the reactor bu ilding.

Ground-level effluent releases are detailed in Table 2.2-C. Data in this table include releases from the reactor building vent, turbine building, and assorted equipment decontamination facilities (e.g.,

hot machine shop, carbon dioxide pellet decon trai ler, plastic media decon trailer, etc.) used during the period . Due to the close proximity of the reactor building, all of these release points are considered to be mixed-mode/ground level release points.

Following the revision of Regulatory Guide 1.21 in 2009, the nuclear industry re-assessed their gaseous effluent releases in accordance with the new definition of "principal radionuclide". Under this new definition, any radionuclide that contributed greater than 1% of the effluent dose calculated to demonstrate compliance with 10CFR50 Appendix I, or contributed more than 1% of the total activity for that type of effluent release, wou ld be classified as a principal radionuclide. Although Carbon-14 (C-14) had been exempted from gaseous effluent calculations in the 1970s, industry assessments in 2009 revealed that Carbon-14 would qualify as a principal radionuclide. Based on this 2009 re-assessment, licensees were required to begin reporting C-14 gaseous effluents in the Annual Radioactive Effluent Release Report beginning with calendar-year 2010. Carbon-14 releases for 2018 are summarized in Tables 2.2-A through 2.2-C, and the dose consequences from C-14 are incorporated into the dose assessments documented in Section 4.2 of this report.

Table 3.1-2 of the PNPS ODCM requires that if any of the gaseous effluent monitors are inoperable for more than 30-days, such events are to be reported in the Annual Radioactive Effluent Release Report with an explanation of why the affected monitor was not returned to operable status in a Page 8

timely manner. During 2018, there were no instances when the Turbine Building Gaseous Effluent Monitor (C-3003) or the Feed Pump Gaseous Effluent Monitor (C-3004) was out of service for more than a 30 consecutive day period. Two instances (Feb-2018 and Mar-2018) of a loss of 23kv rendered both Turbine Building Gaseous Effluent units out of service for a short duration, as an enhancement, both units power supply was changed to vital power to eliminate the threat of losing the effluent units when there was a loss of the 23kv line. There were no instances in 2018 when both channels of a dual-channel effluent monitor (Main Stack, Reactor Building Vent) were out of service at the same time during a 30 consecutive day period.

2.3 Liquid Effluent Data Liquid radioactivity is released from PNPS to Cape Cod Bay via the circulating water discharge canal. These effluents enter Cape Cod Bay at the outfall of the canal, which is located approximately 1100 feet north of the reactor building.

Liquid effluent releases are summarized in Table 2.3-A. Detailed breakdowns for individual radionuclides are listed in Table 2.3-B. There were no discharges of liquid effluents containing radioactivity during the reporting period. Total releases for the various categories of radionuclides, as well as their corresponding mean concentrations, can be summarized as follows:

• Total Effluent Volume: 0 Liters

• Total Dilution Volume: 0 Liters

• Fission/Activation products: 0.00 Ci, 0.00 µCi/ml

• Tritium: 0.00 Ci, 0.00 µCi/ml

• Dissolved/entrained noble gases: 0.00 Ci, 0.00 ~tCi/ml Page 9

Table 2.1 Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Supplemental Information January-December 2018 FACILITY: PILGRIM NUCLEAR POWER STATION LICENSE: DPR-35

1. REGULATORY LIMITS

a. Fission and activation gases: 500 mrem/yr total body and 3000 mrem/yr for skin at site boundary b,c. Iodines, particulates with half-life: 1500 mrem/yr to any organ at site boundary

>8 days, tritium

d. Liquid effluents: 0.06 mrem/month for whole body and 0.2 mrem/month for any organ (without radwaste treatment)

2. EFFLUENT CONCENTRATION LIMITS

a. Fission and activation gases: 10CFR20 Appendix B Table II

b. Iodines: 10CFR20 Appendix B Table II C. Particulates with half-life > 8 days: 10CFR20 Appendix B Table II

d. Liquid effluents: 2E-04 ~1Ci/ml for entrained noble gases; 10CFR20 Appendix B Table II values for all other radionucl ides

3. AVERAGE ENERGY Not Applicable

4. MEASUREMENTS AND APPROXIMATIONS OF TOTAL RADIOACTIVITY

a. Fission and activation gases: High purity germanium gamma spectroscopy for all

b. Iodines: gamma emitters; radiochem istry analysis for H-3, C. Particulates: Fe-55 (liquid effluents) , Sr-89, and Sr-90

d. Liquid effluents:

5. BATCH RELEASES Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Dec 2018 2018 2018 2018 2018

a. Liquid Effluents

1. Total number of releases: N/A N/A N/A N/A N/A

2. Total time period (minutes) : N/A N/A N/A N/A N/A

3. Maximum time period (minutes): N/A N/A N/A N/A N/A

4. Averaqe time period (minutes): NIA N/A N/A N/A N/A

5. Minimum time period (minutes): NIA N/A N/A N/A N/A

6. Average stream flow during periods of release of N/A N/A N/A NIA N/A effluents into a flowing stream (Liters/min) :

b. Gaseous Effluents None None None None None

6. ABNORMAL RELEASES

a. Liquid Effluents None None None None None

b. Gaseous Effluents None None None None None Page 10

Table 2.2-A Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Gaseous Effluents - Summation of All Releases January-December 2018 Est.

RELEASE PERIOD Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Dec Total 2018 2018 2018 2018 2018 Error A. FISSION AND ACTIVATION GASES Total Release: Ci NOA NOA NOA NOA NOA Averaqe Release Rate: ~tCi/sec O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO +/-22%

Percent of Effluent Control Limit* * * * *

• B. IODINE-131 Total lodine-131 Release: Ci 4.34E-05 4.55E-05 6.63E-05 5.60E-05 2.11 E-04 Average Release Rate: µCi/sec 5.50E-06 5.77E-06 8.41 E-06 7.10E-06 6.70E-06 +/-20%

Percent of Effluent Control Limit* * * * *

• C. PARTICULATES WITH HALF-LIVES> 8 DAYS Total Release: Ci 7.13E-05 2.26E-05 3.79E-05 5.64E-05 1.88E-04 Averaqe Release Rate: ~tCi/sec 9.05E-06 2.87E-06 4.80E-06 7.15E-06 5.97E..,06

+/-21%

Percent of Effluent Control Limit* * * * *

• Gross Alpha Radioactivity: Ci NOA NOA NOA NOA NOA D. TRITIUM Total Release: Ci 7.66E+OO 6.74E+OO 7.32E+OO 1.23E+01 3.40E+01 Average Release Rate: ~tCi/sec 9.71 E-01 8.54E-01 9.28E-01 1.56E+OO 1.08E+OO +/-20%

Percent of Effluent Control Limit* * * * *

• E. CARBON-14 Total Release: Ci 1.46E+OO 1.43E+OO 1.75E+OO 1.88E+OO 6.52E+OO Averaqe Release Rate: uCi/sec 1.86E-01 1.81 E-01 2.22E-01 2.39E-01 2.07E-01 N/A Percent of Effluent Control Limit* * * * *

• Notes for Table 2.2-A:

• Percent of Effluent Control Limit values based on dose assessments are provided in Section 6 of this report.

1. NOA stands for No Detectable Activity.

2. LLD for airborne gross alpha activity listed as NOA is 1 E-11 pCi/cc.

3. N/A stands for not applicable.

Page 11

Table 2.2-B Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Gaseous Effluents - Elevated Release January-December 2018 CONTINUOUS MODE RELEASES FROM ELEVATED RELEASE POINT Nuclide Released Jan-Mar 2018 Apr-Jun 2018 Jul-Sep 2018 Oct-Dec 2018 Jan-Dec 2018

1. FISSION AND ACTIVATION GASES: Ci Ar-41 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-85 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-85m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-87 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-88 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-131m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-133 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-133m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-135 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-135m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-137 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-138 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total for Period O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

2. IODINES: Ci 1-131 1.59E-06 1.64E-06 1.56E-06 O.OOE+OO 4.79E-06 1-133 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total for Period 1.59E-06 1.64E-06 1.56E-06 O.OOE+OO 4.79E-06

3. PARTICULATES WITH HALF-LIVES> 8 DAYS: Ci Cr-51 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Mn-54 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fe-59 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-58 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-60 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Zn-65 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Sr-89 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Sr-90 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Ru-103 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-134 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-137 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Ba/La-140 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total for Period O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

4. TRITIUM: Ci H-3 2.77E-02 1.22E-02 3.36E-02 5.41 E-02 1.28E-01

5. CARBON-14: Ci C-14 1.42E+OO 1.39E+OO 1.69E+OO 1.83E+OO 6.33E+OO Notes for Table 2.2-8:

1. N/A stands for not applicable.

2. NOA stands for No Detectable Activity.

3. LLDs for airborne radionuclides listed as NOA are as follows:

Fission Gases: 1E-04 µCi/cc Iodines: 1E-12 µCi/cc Particulates: 1E-11 µCi/cc Page 12

Table 2.2-B (continued)

Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Gaseous Effluents - Elevated Release January-December 2018 BATCH MODE RELEASES FROM ELEVATED RELEASE POINT Nuclide Released Jan-Mar 2018 Apr-Jun 2018 Jul-Sep 2018 Oct-Dec 2018 Jan-Dec 2018

1. FISSION AND ACTIVATION GASES: Ci Ar-41 NIA NIA N/A NIA N/A Kr-85 N/A NIA N/A N/A N/A Kr-85m NIA N/A N/A N/A NIA Kr-87 N/A N/A N/A N/A N/A Kr-88 N/A N/A N/A N/A N/A Xe-131m N/A N/A N/A N/A N/A Xe-133 N/A N/A N/A N/A N/A Xe-133m N/A N/A N/A N/A N/A Xe-135 N/A N/A NIA N/A N/A Xe-135m N/A N/A NIA N/A N/A Xe-137 N/A NIA N/A N/A N/A Xe-138 NIA NIA N/A NIA N/A Total for period N/A NIA N/A N/A NIA

2. IODINES: Ci 1-131 N/A N/A N/A N/A N/A 1-133 N/A N/A N/A N/A N/A Total for period NIA NIA N/A NIA NIA

3. PARTICULATES WITH HALF-LIVES> 8 DAYS: Ci Cr-51 NIA N/A N/A N/A N/A Mn-54 N/A N/A N/A N/A N/A Fe-59 N/A N/A N/A N/A N/A Co-58 N/A NIA N/A NIA NIA Co-60 NIA NIA N/A N/A N/A Zn-65 N/A N/A N/A N/A NIA Sr-89 NIA NIA N/A N/A N/A Sr-90 NIA N/A N/A N/A N/A Ru-103 N/A N/A NIA N/A N/A Cs-134 N/A NIA N/A NIA NIA Cs-137 NIA N/A NIA N/A N/A Ba/La-140 N/A N/A N/A N/A N/A Total for period N/A N/A N/A N/A N/A

4. TRITIUM: Ci H-3 N/A N/A N/A N/A N/A

5. CARBON-14: Ci C-14 N/A N/A N/A N/A NIA Notes for Table 2.2-B:

1. N/A stands for not applicable.

2. NOA stands for No Detectable Activity.

3. LLDs for airborne radionuclides listed as NOA are as follows:

Fission Gases: 1E-04 µCi/cc Iodines: 1E-12 µCi/cc Particulates: 1E-11 µCi/cc Page 13

Table 2.2-C Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Gaseous Effluents - Ground-Level Release January-December 2018 CONTINUOUS MODE RELEASES FROM GROUND-LEVEL RELEASE POINT Nuclide Released Jan-Mar 2018 Apr-Jun 2018 Jul-Sep 2018 Oct-Dec 2018 Jan-Dec 2018

1. FISSION AND ACTIVATION GASES: Ci Ar-41 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-85 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-85m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-87 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kr-88 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-131m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-133 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-133m O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-135 O.OOE+OO 2.24E+OO 2.21E+OO 3.35E+OO 7.80E+OO Xe-135m O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO Xe-137 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe-138 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total for period O.OOE+OO 2.24E+OO 2.21E+OO 3.35E+OO 7.80E+OO

2. IODINES: Ci 1-131 4.18E-05 4.39E-05 6.47E-05 5.60E-05 2.06E-04 1-133 2.41 E-04 2.85E-04 3.33E-04 3.69E-04 1.23E-03 Total for period 2.83E-04 3.29E-04 3.97E-04 4.25E-04 1.43E-03

3. PARTICULATES WITH HALF-LIVES> 8 DAYS: Ci Cr-51 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Mn-54 1.94E-05 1.25E-05 O.OOE+OO 1.89E-05 5.0SE-05 Fe-59 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-58 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-60 1.13E-05 O.OOE+OO O.OOE+OO 3.87E-06 1.52E-05 Zn-65 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Sr-89 O.OOE+OO 1.42E-05 1.91E-05 2.SOE-05 6.14E-05 Sr-90 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Ru-103 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-134 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-137 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Ba/La-140 3.62E-05 O.OOE+OO 3.12E-05 1.73E-05 8.47E-05 Total for period 6.69E-05 2.68E-05 5.03E-05 6.81 E-05 2.12E-04

4. TRITIUM: Ci H-3 7.63E+OO 6.72E+OO 7.28E+OO 1.22E+01 3.39E+01

5. CARBON-14: Ci C-14 4.39E-02 4.29E-02 5.18E-02 5.71 E-02 1.96E-01 Notes for Table 2.2-C:

1. N/A stands for not applicable.

2. NOA stands for No Detectable Activity.

3. LLDs for airborne radionuclides listed as NOA are as follows:

Fission Gases: 1E-04 µCi/cc Iodines: 1E-12 µCi/cc Particulates: 1E-11 µCi/cc Page 14

Table 2.2-C (continued)

Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Gaseous Effluents - Ground-Level Release January-December 2018 BATCH MODE RELEASES FROM GROUND-LEVEL RELEASE POINT Nuclide Released Jan-Mar 2018 Apr-Jun 2018 Jul-Sep 2018 Oct-Dec 2018 Jan-Dec 2018

1. FISSION AND ACTIVATION GASES: Ci Ar-41 N/A NIA NIA N/A NIA Kr-85 NIA NIA NIA N/A NIA Kr-85m NIA NIA N/A N/A N/A Kr-87 NIA NIA NIA N/A N/A Kr-88 NIA N/A N/A N/A N/A Xe-131m N/A N/A N/A N/A N/A Xe-133 N/A N/A N/A N/A NIA Xe-133m N/A N/A N/A N/A N/A Xe-135 N/A N/A N/A N/A N/A Xe-135m N/A N/A N/A N/A N/A Xe-137 N/A N/A N/A N/A N/A Xe-138 N/A N/A N/A N/A N/A Total for period N/A N/A NIA NIA NIA

2. IODINES: Ci 1-131 NIA N/A N/A N/A N/A 1-133 N/A N/A N/A N/A N/A Total for period N/A N/A N/A N/A N/A

3. PARTICULATES WITH HALF-LIVES> 8 DAYS: Ci Cr-51 NIA N/A NIA N/A NIA Mn-54 NIA NIA N/A N/A N/A Fe-59 NIA N/A N/A N/A N/A Co-58 N/A N/A N/A N/A N/A Co-60 N/A N/A NIA NIA NIA Zn-65 N/A NIA N/A N/A N/A Sr-89 NIA N/A N/A NIA N/A Sr-90 N/A N/A N/A N/A N/A Ru-103 N/A NIA N/A N/A N/A Cs-134 N/A N/A N/A N/A N/A Cs-137 N/A N/A NIA NIA N/A Ba/La-140 N/A N/A N/A N/A N/A Total for period N/A N/A N/A N/A N/A

4. TRITIUM: Ci H-3 N/A NIA N/A N/A N/A

5. CARBON-14: Ci C-14 N/A N/A N/A NIA NIA Notes for Table 2.2-C:

1. NIA stands for not applicable.

2. NOA stands for No Detectable Activity.

3. LLDs for airborne radionuclides listed as NOA are as follows:

Fission Gases: 1E-04 µCi/cc Iodines: 1E-12 µCi/cc Particulates: 1E-11 µCi/cc Page 15

Table 2.3-A Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Liquid Effluents - Summation of All Releases January-December 2018 Est.

RELEASE PERIOD Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Dec Total 2018 2018 2018 2018 2018 Error A. FISSION AND ACTIVATION PRODUCTS Total Release (not including tritium, gases. alpha): Ci NIA NIA NIA NIA NIA Average Diluted Concentration During Period : µCi/ml NIA NIA NIA NIA NIA +/-12%

Percent of Effluent Concentration Limit*

NIA NIA NIA NIA NIA B. TRITIUM Total Release: Ci NIA NIA NIA NIA NIA Average Diluted Concentration NIA NIA NIA NIA NIA During Period : ~1Ci/ml +/-9.4%

Percent of Effluent Concentration NIA NIA NIA NIA NIA Limit*

C. DISSOLVED AND ENTRAINED GASES Total Release: Ci NIA NIA NIA NIA NIA Average Diluted Concentration NIA NIA NIA NIA NIA During Period: ~1Ci/ml +/-16%

Percent of Effluent Concentration NIA NIA NIA NIA NIA Limit*

D. GROSS ALPHA RADIOACTIVITY Total Release: Ci NIA NIA NIA NIA NIA +/-34%

E. VOLUME OF WASTE RELEASED PRIOR TO DILUTION Waste Volume: Liters O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO +/-5.7%

F. VOLUME OF DILUTION WATER USED DURING PERIOD Dilution Volume: Liters 1.28E+11 1.37E+11 1.55E+11 1.03E+11 5.24E+11 +/-10%

Notes for Table 2.3-A:

• Additional percent of Effluent Control Limit values based on dose assessments are provided in Section 6 of this report.

1. N/A stands for not applicable.

2. NOA stands for No Detectable Activity.

3. LLD for dissolved and entrained gases listed as NOA is 1E-05 µCi/ml.

4. LLD for liquid gross alpha activity listed as NOA is 1E-07 ~1Ci/ml.

Page 16

Table 2.3-B Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Liquid Effluents January-December 2018 CONTINUOUS MODE RELEASES Nuclide Released Jan-Mar 2018 Apr-Jun 2018 Jul-Sep 2018 Oct-Dec 2018 Jan-Dec 2018

1. FISSION AND ACTIVATION PRODUCTS: Ci Cr-51 N/A N/A NIA N/A NIA Mn-54 N/A N/A N/A N/A N/A Fe-55 N/A N/A NIA N/A N/A Fe-59 NIA NIA NIA NIA NIA Co-58 NIA NIA N/A NIA NIA Co-60 NIA NIA N/A NIA NIA Zn-65 N/A NIA N/A NIA N/A Zn-69m N/A N/A N/A NIA N/A Sr-89 N/A N/A N/A NIA NIA Sr-90 N/A N/A N/A NIA N/A Zr/Nb-95 N/A N/A N/A N/A N/A Mo/Tc-99 N/A N/A N/A NIA N/A Ag-110m N/A N/A NIA NIA N/A Sb-124 N/A N/A N/A NIA NIA 1-131 NIA NIA N/A NIA NIA 1-133 N/A N/A N/A NIA NIA Cs-134 N/A N/A N/A N/A NIA Cs-137 N/A N/A N/A N/A NIA Ba/la-140 N/A N/A NIA N/A N/A Ce-141 N/A N/A NIA NIA N/A Total for period NIA NIA N/A NIA N/A

2. DISSOLVED AND ENTRAINED GASES: Ci Xe-133 N/A N/A NIA NIA N/A Xe-135 N/A N/A NIA NIA NIA Total for period NIA NIA N/A NIA N/A Notes for Table 2.3-B:

1. N/A stands for not applicable.

2. NOA stands for No Detectable Activity.

3. llDs for liquid radionuclides listed as NOA are as follows:

Strontium: SE-08 µCi/ml Iodines: 1E-06 µCi/ml Noble Gases: 1E-05 ~1Cilml All Others: SE-07 µCi/ml Page 17

Table 2.3-B (continued)

Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Liquid Effluents January-December 2018 BATCH MODE RELEASES Nuclide Released Jan-Mar 2018 Apr-Jun 2018 Jul-Sep 2018 Oct-Dec 2018 Jan-Dec 2018

1. FISSION AND ACTIVATION PRODUCTS: Ci Na-24 NIA NIA NIA NIA NIA Cr-51 NIA NIA NIA NIA NIA Mn-54 NIA NIA NIA NIA NIA Fe-55 NIA NIA NIA NIA NIA Fe-59 NIA NIA NIA NIA NIA Co-58 NIA NIA NIA NIA NIA Co-60 NIA NIA NIA NIA NIA Zn-65 NIA NIA NIA NIA NIA Zn-69m NIA NIA NIA NIA NIA Sr-89 NIA NIA NIA NIA NIA Sr-90 NIA NIA NIA NIA NIA ZrlNb-95 NIA NIA NIA NIA NIA Mo/Tc-99 NIA NIA NIA NIA NIA Ag-110m NIA NIA NIA NIA NIA Sb-124 NIA NIA NIA NIA NIA 1-131 NIA NIA NIA NIA NIA 1-133 NIA NIA NIA NIA NIA Cs-134 NIA NIA NIA NIA NIA Cs-137 NIA NIA NIA NIA NIA Ba/La-140 NIA NIA NIA NIA NIA Ce-141 NIA NIA NIA NIA NIA Ce-144 NIA NIA NIA NIA NIA Total for period NIA NIA NIA NIA NIA

2. DISSOLVED AND ENTRAINED GASES: Ci Xe-133 NIA NIA NIA NIA NIA Xe-135 NIA NIA NIA NIA NIA Total for period NIA NIA NIA NIA NIA Notes for Table 2.3-8:

1. N/A stands for not applicable.

2. NDA stands for No Detectable Activity.

3. llDs for liquid radionuclides listed as NOA are as follows:

Strontium: 5E-08 µCi/ml Iodines: 1E-06 ~1Ci/ml Noble Gases: 1E-05 ~1Ci/ml All Others: 5E-07 µCi/ml Page 18

3.0 METEOROLOGICAL DATA Meteorological data are summarized for the reporting period in Appendix A, in the standard joint frequency distribution format as given in NRC Regulatory Guide 1.21.

The predominant meteorological conditions observed during the annual reporting period can be summarized with their corresponding frequencies as follows:

• Stability Class: Class D, 48%

• 33-ft Wind Direction (from): South-southwest, 15%

• 33-ft Wind Speed: 3.5-7.5 mph, 55%

• 220-ft Wind Direction (from): South-southwest, 14%

• 220-ft Wind Speed: 12.5-18.5 mph, 35%

Joint data recovery for the 33-ft level was 98.1 % and for the 220-ft level of the tower was 96.0%,

both of which meet the 90% annual data recovery goal specified by the NRC. No major problems were encountered in 2018. There were a couple if instances in Feb-2018 and Nov-2018, where for short periods of time some anomalous wind and delta-T readings observed on the 220-ft tower, until wind sensors could be replaced. Wind speed and wind direction values from the 220-ft tower were not affected. Issues with ultrasonic wind sensor heaters were typical for the reporting period winter months. Ice and snow occasionally plugged the sensors until the low current heaters melted the ice pack, the weather subsided or the sensors Page 19

4.0 MAXIMUM INDIVIDUAL DOSES Doses to the maximum exposed individual resulting from radionuclides in effluents released offsite were calculated using methods presented in the PNPS Offsite Dose Calculation Manual (ODCM, Reference 2), NRC Regulatory Guide 1.109 (Reference 3), NRC Regulatory Guide 1.111 (Reference 4), and the Pilgrim Station Unit 1 Appendix I Evaluation (Reference 5). Maximum individual doses are calculated separately for: (1) noble gases in gaseous effluents, (2) particulates, iodines, and tritium in gaseous effluents; and, (3) liquid effluents. Maximum consumption and use factors for various pathways from Table E-5 of the PNPS ODCM are used for calculating the doses to the maximum exposed individual.

Information related to liquid and gaseous effluent releases are summarized Section 2 of this report.

These effluent release data were used as input to computer programs to calculate the resulting doses. PNPS ODCM methodologies were used to calculate the dose contributions to the various organs in each age class from major exposure pathways.

4.1 Doses From Noble Gas Releases Gaseous effluent release data presented in Tables 2.2-A, 2.2-B, and 2.2-C from this effluent release report were used as input to a dose assessment computer program to calculate radiation doses.

These data include gaseous releases from the PNPS main stack, reactor building vent, and turbine building roof exhausters. Meteorological data obtained from the PNPS 220-foot meteorological tower during the 10-year period from 2005 through 2014 were used as input to the "AEOLUS-3" computer program (Reference 6). This program was used to calculate the annual average atmospheric dispersion and deposition factors used in the dose assessment computer program to calculate maximum individual doses.

The maximum individual doses resulting from radioactive noble gases released in gaseous effluents are presented in Table 4.1 according to specific receptor locations. This table includes all noble gas doses for the individual calendar quarters and total calendar year.

Noble gases released in gaseous effluents from PNPS during 2018 resulted in a maximum total body dose of 0.000548 mrem. The maximum skin dose was 0.00297 mrem. Both of these doses occurred to a hypothetical individual, assumed to be present 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per day, 365 days per year, at the site boundary location yielding the highest dose (0.63 km SSW of the Reactor Building). For the more "realistic" individuals at offsite locations, the maximum total body dose was 0.000425 mrem (nearest residence, 0.86 kilometers WNW from the Reactor Building), while the maximum skin dose was 0.000202 mrem (nearest residence, 2.39 kilometers SSW from the Reactor Building).

Page 20

Table 4.1 Maximum Doses From Noble Gas Releases During 201 B(a)

Gamma Beta Total Release Air Dose Air Dose Body Dose Skin Dose Period mrad/period mrad/period mrem/period mrem/period (location) (location) (location) (location)

Jan-Mar O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO (0.52 km SSE) (0 .64 km ESE) (0.52 km SSE) (0.54 km NW)

Apr-Jun 2.38E-04 8.82E-04 1.57E-04 8.52E-04 (0 .52 km SSE) (0.64 km ESE) (0.52 km SSE) (0.54 km NW)

Jul-Sep 2.36E-04 8.72E-04 1.55E-04 8.42E-04 (0 .52 km SSE) (0.64 km ESE) (0.52 km SSE) (0.54 km NW)

Oct-Dec 3.57E-04 1.32E-03 2.36E-04 1.28E-03 (0 .52 km SSE) (0.64 km ESE) (0.52 km SSE) (0 .54 km NW)

Jan-Dec 8.31 E-04 3.0BE-03 5.48E-04 2.97E-03 (0 .52 km SSE) (0 .64 km ESE) (0 .52 km SSE) (0.54 km NW)

(al All directions and distances are with respect to the reactor building vent.

Page 21

4.2 Doses From Gaseous Effluent Releases Gaseous effluent release data presented in Tables 2.2-A, 2.2-B, and 2.2-C from this effluent release report were used as input to a dose assessment computer program to calculate radiation doses.

These data include gaseous releases from the PNPS main stack, reactor building vent, and turbine building roof exhausters. Meteorological data obtained from the PNPS 220-foot meteorological tower during the 10-year period from 2005 through 2014 were used as input to the NRC XOQDOQ computer program (Reference 7). This program was used to calculate the annual average atmospheric dispersion and deposition factors used in the dose assessment computer program to calculate maximum individual doses.

The maximum individual doses resulting from radioactive particulates, radioiodines, tritium and carbon-14 released in gaseous effluents are presented in Tables 4.2-A through 4.2-E. These tables cover the individual calendar quarters and the total calendar year, respectively. Doses resulting from releases of noble gases are addressed independently in the PNPS ODCM. Therefore, none of these tables for maximum individual doses include any dose contribution from noble gases. The presentation and analysis of doses resulting from noble gases are addressed in Section 4.1 of this report.

Tables 4.2-A through 4.2-E summarize the maximum total body and organ doses for the adult, teen, child, and infant age classes resulting from the major gaseous exposure pathways. These tables present the dose data according to specific receptor location and the exposure pathways assumed to occur at that location. For example, the second column of the tables presents the information for the hypothetical maximum-exposed at the most restrictive site boundary location, where only inhalation and ground deposition exposure pathways are assumed to occur. Since this is a shoreline location controlled by Entergy, the other pathways of garden vegetable production, milk production, and meat production are assumed not to occur. Doses for other offsite locations not under Entergy control, where other exposure pathways can and do occur, are presented in subsequent columns of the tables, and represent the potential maximum doses to individuals at these locations. For consistency, all distances listed in the first row of Tables 4.2-A through 4.2-E are measured from the Reactor Building Vent. However, doses at the specific receptor locations are calcu lated based on the actual distances from the applicable release points (PNPS main stack, reactor building vent, and turbine building roof exhausters).

Radioactivity (particulates, radioiodines, tritium, and carbon-14) released in gaseous effluents from PNPS during 2018 resulted in a maximum total body dose of 0.0136 mrem (child age class at nearest meat animal, 3.82 kilometers S from the Reactor Building), whi le the maximum organ dose was 0.0646 mrem (child bone at nearest meat animal, 3.82 kilometers S from the Reactor Building).

Carbon-14 contributed 14% of the child total body dose and >99% of the child bone dose at the location of the nearest meat animal.

Page 22

Table 4 .2-A Maximum Individual Organ Dose at Receptor Location -- mrem From Gaseous Release Period: Jan-Mar 2018 Receptor: Bound Resident Garden Cow/Goat Cow/Meat Meat Direction: WNW s s w w s Distance 1: 0.24km 2.22 km 3.44 km 3.75 km 5.17 km 3.82 km Pathwav2: DI DI DIV 3 DIVCG 3 D1VCM 3 DIVM 3 Age Class: Adult Bone 4 .53E-05 1.04E-04 3.29E-03 1.91 E-03 1.68E-03 4.44E-03 GI-LLI 5.04E-05 5.19E-05 7.SOE-04 5.11 E-04 4.23E-04 9.90E-04 Kidney 5.03E-05 5.19E-05 7.49E-04 5.10E-04 4.23E-04 9.89E-04 Liver 5.03E-05 5.18E-05 7.49E-04 5.10E-04 4 .22E-04 9.89E-04 Lung 5.11E-05 5.25E-05 7.SOE-04 5.11 E-04 4.23E-04 9.89E-04 Thyroid 5.77E-05 5.77E-05 7.69E-04 5.96E-04 4.72E-04 1.01 E-03 T.Body 5.02E-05 5.18E-05 7.49E-04 5.10E-04 4 .22E-04 9.89E-04 Age Class: Teen Bone 6.49E-05 1.49E-04 5.31 E-03 3.20E-03 2.54E-03 6.27E-03 GI-LLI 5.44E-05 6.06E-05 1.17E-03 7.90E-04 6.03E-04 1.36E-03 Kidney 5.43E-05 6.06E-05 1.16E-03 7.90E-04 6.02E-04 1.36E-03 Liver 5.43E-05 6.0SE-05 1.16E-03 7.90E-04 6.02E-04 1.36E-03 Lung 5.56E-05 6.1 SE-05 1.16E-03 7.90E-04 6.03E-04 1.36E-03 Thyroid 6.39E-05 6.81 E-05 1.18E-03 9.16E-04 6.74E-04 1.38E-03 T.Body 5.43E-05 6.0SE-05 1.16E-03 7.89E-04 6.02E-04 1.36E-03 Aqe Class: Child Bone 8.96E-05 2.06E-04 1.27E-02 7.73E-03 5.96E-03 1.45E-02 GI-LLI 5.40E-05 6.74E-05 2.68E-03 1.76E-03 1.33E-03 3.04E-03 Kidney 5.41 E-05 6.74E-05 2.68E-03 1.76E-03 1.33E-03 3.04E-03 Liver 5.40E-05 6.74E-05 2.68E-03 1.76E-03 1.33E-03 3.04E-03 Lunq 5.SOE-05 6.82E-05 2.68E-03 1.76E-03 1.33E-03 3.04E-03 Thyroid 6.57E-05 7.67E-05 2.71 E-03 2.00E-03 1.46E-03 3.07E-03 T.Body 5.40E-05 6.74E-05 2.68E-03 1.76E-03 1.3.3E-03 3.04E-03 Age Class: Infant Bone 6.60E-05 1.52E-04 1.00E-04 4.85E-03 3.39E-03 9.91 E-05 GI-LLI 3.46E-05 4.70E-05 3.35E-05 1.14E-03 7.82E-04 3.31 E-05 Kidney 3.47E-05 4 .70E-05 3.35E-05 1.14E-03 7.83E-04 3.31 E-05 Liver 3.47E-05 4 .70E-05 3.35E-05 1.14E-03 7.83E-04 3.31E-05 Lung 3.54E-05 4.75E-05 3.39E-05 1.14E-03 7.83E-04 3.35E-05 Thyroid 4.54E-05 5.SSE-05 4.02E-05 1.68E-03 1.0SE-03 3.98E-05 T.Body 3.46E-05 4.70E-05 3.35E-05 1.14E-03 7.83E-04 3.31 E-05 1

Distances are measured with respect to the reactor building vent.

2 Pathway designations are as follows:

=

D Deposition (Ground Plane) I = Inhalation =

V Vegetable Garden 3

=

C Cow Milk =

G Goat Milk =

M Meat Doses are conservative since it is unlikely for vegetables to be grown outside or for animals to be fed on pasture during winter months.

Page 23

Table 4.2-8 Maximum Individual Organ Dose at Receptor Location -- mrem From Gaseous Release Period: Apr-Jun 2018 Receptor: Bound Resident Garden Cow/Goat Cow/Meat Meat Direction: WNW s s w w s Distance 1: 0.24km 2.22 km 3.44 km 3.75 km 5.17 km 3.82 km Pathway2: DI DI DIV 3 DIVCG 3 D1VCM 3 DIVM 3 Age Class: Adult Bone 4.43E-05 1.02E-04 3.21 E-03 1.87E-03 1.64E-03 4.35E-03 GI-LLI 4.51 E-05 4.76E-05 7.24E-04 4.87E-04 4.0SE-04 9.57E-04 Kidney 4.52E-05 4.76E-05 7.23E-04 4.87E-04 4.0SE-04 9.57E-04 Liver 4.51 E-05 4.75E-05 7.23E-04 4.86E-04 4.0SE-04 9.57E-04 Lung 4.53E-05 4.77E-05 7.23E-04 4.86E-04 4.0SE-04 9.57E-04 Thyroid 5.34E-05 5.41 E-05 7.44E-04 5.78E-04 4.57E-04 9.81E-04 T.Body 4 .51E-05 4.75E-05 7.23E-04 4.86E-04 4.0SE-04 9.57E-04 Age Class: Teen Bone 6.35E-05 1.46E-04 5.20E-03 3.14E-03 2.48E-03 6.13E-03 GI-LLI 4.90E-05 5.60E-05 1.13E-03 7.58E-04 5.80E-04 1.32E-03 Kidney 4.91 E-05 5.60E-05 1.13E-03 7.58E-04 5.80E-04 1.32E-03 Liver 4.90E-05 5.60E-05 1.13E-03 7.58E-04 5.80E-04 1.32E-03 Lung 4.94E-05 5.63E-05 1.13E-03 7.57E-04 5.80E-04 1.32E-03 Thyro id 5.98E-05 6.45E-05 1.15E-03 8.91 E-04 6.56E-04 1.34E-03 T.Body 4.90E-05 5.60E-05 1.13E-03 7.57E-04 5.80E-04 1.32E-03 Age Class: Child Bone 8.76E-05 2.01 E-04 1.24E-02 7.57E-03 5.83E-03 1.42E-02 GI-LLI 4 .92E-05 6.31 E-05 2.61 E-03 1.?0E-03 1.28E-03 2.96E-03 Kidney 4.93E-05 6.31 E-05 2.61 E-03 1.?0E-03 1.28E-03 2.96E-03 Liver 4.92E-05 6.31 E-05 2.61 E-03 1.?0E-03 1.28E-03 2.96E-03 Lung 4 .95E-05 6.33E-05 2.61 E-03 1.?0E-03 1.28E-03 2.96E-03 Thyroid 6.24E-05 7.36E-05 2.64E-03 1.96E-03 1.43E-03 2.99E-03 T.Body 4 .92E-05 6.31 E-05 2.61 E-03 1.?0E-03 1.28E-03 2.96E-03 Age Class: Infant Bone 6.46E-05 1.48E-04 9.78E-05 4.75E-03 3.32E-03 9.69E-05 GI-LU 3.18E-05 4.43E-05 3.14E-05 1.11 E-03 7.59E-04 3.11E-05 Kidney 3.18E-05 4.44E-05 3.14E-05 1.11 E-03 7.60E-04 3.11E-05 Liver 3.18E-05 4.43E-05 3.14E-05 1.11 E-03 7.60E-04 3.11 E-05 Lung 3.21 E-05 4.45E-05 3.16E-05 1.11 E-03 7.59E-04 3.13E-05 Thyroid 4.40E-05 5.40E-05 3.90E-05 1.68E-03 1.08E-03 3.86E-05 T.Body 3.18E-05 4.43E-05 3.14E-05 1.11 E-03 7.60E-04 3.11E-05 1

Distances are measured with respect to the reactor building vent.

2 Pathway designations are as follows:

D = Deposition (Ground Plane) I = Inhalation V = Vegetable Garden C = Cow Milk G = Goat Milk M = Meat Page 24

Table 4.2-C Maximum Individual Organ Dose at Receptor Location -- mrem From Gaseous Release Period: Jul-Sep 2018 Receptor: Bound Resident Garden Cow/Goat Cow/Meat Meat Direction: WNW s s w w s Distance 1: 0.24km 2.22 km 3.44 km 3.75 km 5.17 km 3.82 km Pathway2: DI DI D1V3 DIVCG 3 DIVCM 3 DIVM 3 Age Class: Adult Bone 5.41 E-05 1.24E-04 3.92E-03 2.27E-03 2.01E-03 5.30E-03 GI-LLI 5.01 E-05 5.43E-05 8.72E-04 5.78E-04 4.83E-04 1.16E-03 Kidney 5.01 E-05 5.42E-05 8.72E-04 5.78E-04 4.83E-04 1.16E-03 Liver 5.00E-05 5.42E-05 8.72E-04 5.78E-04 4.83E-04 1.16E-03 Lung 5.03E-05 5.44E-05 8.72E-04 5.77E-04 4.83E-04 1.16E-03 Thyroid 6.09E-05 6.27E-05 9.01 E-04 7.09E-04 5.59E-04 1.19E-03 T.Body 5.00E-05 5.42E-05 8.72E-04 5.77E-04 4.83E-04 1.16E-03 AQe Class: Teen Bone 7.74E-05 1.78E-04 6.34E-03 3.82E-03 3.03E-03 7.48E-03 GI-LLI 5.48E-05 6.46E-05 1.37E-03 9.06E-04 6.96E-04 1.60E-03 Kidney 5.48E-05 6.45E-05 1.36E-03 9.06E-04 6.96E-04 1.60E-03 Liver 5.48E-05 6.45E-05 1.36E-03 9.06E-04 6.95E-04 1.60E-03 LunQ 5.53E-05 6.49E-05 1.36E-03 9.06E-04 6.95E-04 1.60E-03 Thyroid 6.87E-05 7.55E-05 1.39E-03 1.10E-03 8.05E-04 1.63E-03 T.Body 5.47E-05 6.45E-05 1.36E-03 9.06E-04 6.95E-04 1.60E-03 Age Class: Child Bone 1.07E-04 2.46E-04 1.52E-02 9.23E-03 7.11 E-03 1.73E-02 GI-LLI 5.56E-05 7.36E-05 3.17E-03 2.05E-03 1.55E-03 3.59E-03 Kidney 5.56E-05 7.36E-05 3.17E-03 2.05E-03 1.55E-03 3.59E-03 Liver 5.56E-05 7.36E-05 3.17E-03 2.05E-03 1.55E-03 3.59E-03 Lung 5.60E-05 7.39E-05 3.17E-03 2.05E-03 1.55E-03 3.59E-03 Thyroid 7.26E-05 8.70E-05 3.20E-03 2.42E-03 1.76E-03 3.64E-03 T.Body 5.56E-05 7.36E-05 3.17E-03 2.05E-03 1.55E-03 3.59E-03 Age Class: Infant Bone 7.88E-05 1.81 E-04 1.19E-04 5.79E-03 4.0SE-03 1.18E-04 GI-LLI 3.62E-05 5.21 E-05 3.67E-05 1.33E-03 9.19E-04 3.64E-05 Kidney 3.63E-05 5.22E-05 3.68E-05 1.34E-03 9.20E-04 3.64E-05 Liver 3.63E-05 5.22E-05 3.68E-05 1.34E-03 9.20E-04 3.64E-05 Lung 3.67E-05 5.25E-05 3.70E-05 1.33E-03 9.19E-04 3.66E-05 Thyroid 5.19E-05 6.45E-05 4.65E-05 2.16E-03 1.38E-03 4.60E-05 T.Body 3.62E-05 5.21 E-05 3.67E-05 1.34E-03 9.19E-04 3.63E-05 1

Distances are measured with respect to the reactor building vent.

2 Pathway designations are as follows:

=

D Deposition (Ground Plane) I = Inhalation =

V Vegetable Garden

=

C Cow Milk =

G Goat Milk =

M Meat Page 25

Table 4.2-D Maximum Individual Organ Dose at Receptor Location -- mrem From Gaseous Release Period: Oct-Dec 2018 Receptor: Bound Resident Garden Cow/Goat Cow/Meat Meat Direction: WNW s s w w s Distance 1: 0.24km 2.22 km 3.44 km 3.75 km 5.17 km 3.82 km Pathway2: DI DI DIV3 DIVCG 3 DIVCM 3 DIVM 3 Age Class: Adult Bone 5.84E-05 1.34E-04 4.23E-03 2.46E-03 2.17E-03 5.72E-03 GI-LU 7.80E-05 7.69E-05 9.94E-04 6.99E-04 5.72E-04 1.31 E-03 Kidney 7.79E-05 7.69E-05 9.93E-04 6.98E-04 5.71 E-04 1.30E-03 Liver 7.79E-05 7.69E-05 9.93E-04 6.98E-04 5.71 E-04 1.30E-03 Lung 7.86E-05 7.74E-05 9.94E-04 6.98E-04 5.71 E-04 1.30E-03 Thyroid 8.85E-05 8.52E-05 1.02E-03 8.12E-04 6.37E-04 1.33E-03 T.Body 7.79E-05 7.68E-05 9.93E-04 6.98E-04 5.71 E-04 1.30E-03 Age Class: Teen Bone 8.37E-05 1.92E-04 6.84E-03 4.14E-03 3.27E-03 8.07E-03 GI-LU 8.33E-05 8.82E-05 1.53E-03 1.06E-03 8.06E-04 1.78E-03 Kidney 8.33E-05 8.82E-05 1.53E-03 1.06E-03 8.06E-04 1.78E-03 Liver 8.32E-05 8.81 E-05 1.53E-03 1.06E-03 8.06E-04 1.78E-03 Lung 8.43E-05 8.90E-05 1.53E-03 1.06E-03 8.06E-04 1.78E-03 Thyroid 9.70E-05 9.90E-05 1.56E-03 1.23E-03 9.01 E-04 1.81 E-03 T.Body 8.32E-05 8.81 E-05 1.53E-03 1.06E-03 8.06E-04 1.78E-03 Age Class: Child Bone 1.15E-04 2.65E-04 1.64E-02 9.98E-03 7.69E-03 1.86E-02 GI-LU 8.13E-05 9.58E-05 3.50E-03 2.33E-03 1.75E-03 3.96E-03 Kidney 8.13E-05 9.58E-05 3.49E-03 2.33E-03 1.75E-03 3.96E-03 Liver 8.13E-05 9.58E-05 3.50E-03 2.33E-03 1.75E-03 3.96E-03 Lung 8.22E-05 9.65E-05 3.50E-03 2.33E-03 1.75E-03 3.96E-03 Thyroid 9.82E-05 1.09E-04 3.53E-03 2.65E-03 1.93E-03 4.00E-03 T.Body 8.13E-05 9.58E-05 3.50E-03 2.33E-03 1.75E-03 3.96E-03 Age Class: Infant Bone 8.51 E-05 1.95E-04 1.29E-04 6.25E-03 4.38E-03 1.28E-04 GI-LU 5.14E-05 6.57E-05 4.73E-05 1.50E-03 1.03E-03 4.68E-05 Kidney 5.14E-05 6.57E-05 4.73E-05 1.51 E-03 1.03E-03 4.68E-05 Liver 5.14E-05 6.57E-05 4.73E-05 1.51 E-03 1.03E-03 4.68E-05 Lung 5.21 E-05 6.63E-05 4.78E-05 1.50E-03 1.03E-03 4.72E-05 Thyroid 6.70E-05 7.79E-05 5.70E-05 2.22E-03 1.43E-03 5.64E-05 T.Body 5.14E-05 6.57E-05 4.73E-05 1.50E-03 1.03E-03 4.68E-05 1

Distances are measured with respect to the reactor building vent.

2 Pathway designations are as follows:

D =Deposition (Ground Plane) I = Inhalation V =Vegetable Garden C =Cow Milk G =Goat Milk M = Meat 3

Doses are conservative since it is unlikely for vegetables to be grown outside or for animals to be fed on pasture during winter months.

Page 26

Table 4.2-E Maximum Individual Organ Dose at Receptor Location -- mrem From Gaseous Release Period: Jan-Dec 2018 Receptor: Bound Resident Garden Cow/Goat Cow/Meat Meat Direction: WNW s s w w s Distance 1: 0.24km 2.22 km 3.44 km 3.75 km 5.17 km 3.82 km 3 3 Pathwav2: DI DI DIV DIVCG DIVCM 3 DIVM 3 Age Class: Adult Bone 2.02E-04 4.64E-04 1.47E-02 8.50E-03 7.50E-03 1.98E-02 GI-LLI 2.24E-04 2.31 E-04 3.34E-03 2.27E-03 1.88E-03 4.41 E-03 Kidney 2.23E-04 2.31 E-04 3.34E-03 2.27E-03 1.88E-03 4.40E-03 Liver 2.23E-04 2.30E-04 3.34E-03 2.27E-03 1.88E-03 4.40E-03 Lung 2.25E-04 2.32E-04 3.34E-03 2.27E-03 1.88E-03 4.41 E-03 Thyroid 2.60E-04 2.60E-04 3.43E-03 2.69E-03 2.13E-03 4.51 E-03 T.Body 2.23E-04 2.30E-04 3.34E-03 2.27E-03 1.88E-03 4.40E-03 Age Class: Teen Bone 2.89E-04 6.65E-04 2.37E-02 1.43E-02 1.13E-02 2.BOE-02 GI-LLI 2.42E-04 2.69E-04 5.19E-03 3.52E-03 2.68E-03 6.06E-03 Kidney 2.41 E-04 2.69E-04 5.19E-03 3.52E-03 2.68E-03 6.06E-03 Liver 2.41 E-04 2.69E-04 5.19E-03 3.52E-03 2.68E-03 6.06E-03 Lung 2.45E-04 2.72E-04 5.19E-03 3.52E-03 2.68E-03 6.06E-03 Thyroid 2.89E-04 3.0?E-04 5.28E-03 4.14E-03 3.04E-03 6.16E-03 T.Body 2.41 E-04 2.69E-04 5.19E-03 3.52E-03 2.68E-03 6.06E-03 Aqe Class: Child Bone 4.00E-04 9.18E-04 5.67E-02 3.45E-02 2.66E-02 6.46E-02 GI-LLI 2.40E-04 3.00E-04 1.20E-02 7.84E-03 5.91 E-03 1.36E-02 Kidney 2.40E-04 3.00E-04 1.19E-02 7.84E-03 5.91 E-03 1.36E-02 Liver 2.40E-04 3.00E-04 1.20E-02 7.84E-03 5.91 E-03 1.36E-02 Lunq 2.43E-04 3.02E-04 1.20E-02 7.84E-03 5.91 E-03 1.36E-02 Thyroid 2.99E-04 3.46E-04 1.21 E-02 9.03E-03 6.59E-03 1.37E-02 T.Body 2.40E-04 3.00E-04 1.20E-02 7.84E-03 5.91 E-03 1.36E-02 Age Class: Infant Bone 2.95E-04 6.77E-04 4.46E-04 2.16E-02 1.51 E-02 4.42E-04 GI-LLI 1.54E-04 2.09E-04 1.49E-04 5.09E-03 3.49E-03 1.47E-04 Kidney 1.54E-04 2.09E-04 1.49E-04 5.09E-03 3.49E-03 1.47E-04 Liver 1.54E-04 2.09E-04 1.49E-04 5.09E-03 3.49E-03 1.47E-04 Lung 1.56E-04 2.11 E-04 1.50E-04 5.09E-03 3.49E-03 1.49E-04 Thyroid 2.0BE-04 2.52E-04 1.83E-04 7.74E-03 4.97E-03 1.81 E-04 T.Body 1.54E-04 2.09E-04 1.49E-04 5.09E-03 3.49E-03 1.47E-04 1

Distances are measured with respect to the reactor building vent.

2 Pathway designations are as follows:

=

D Deposition (Ground Plane) I = Inhalation =

V Vegetable Garden 3

=

C Cow Milk =

G Goat Milk =

M Meat Doses are conservative since it is unlikely for vegetables to be grown outside or for animals to be fed on pasture during winter months.

Page 27

4.3 Doses From Liquid Effluent Releases Liquid effluent release data presented in Tables 2.3-A and 2.3-8 were used as input to the dose assessment computer program to calculate radiation doses. The maximum individual doses resulting from radionuclides released in liquid effluents are presented in Tables 4.3-A through 4.3-E.

These tables cover the individual calendar quarters and the total calendar year, respectively.

Tables 4.3-A through 4.3-E summarize the maximum total body and organ doses for the adult, teen, and child age classes resulting from the major liquid exposure pathways. NRC Regulatory Guide 1.109 does not recognize the infant age class as being exposed to the liquid effluent pathways.

Therefore, doses for this age class are not included in any of the tables.

It should be noted that doses calculated for the entire year might not equal the sum of the doses for the individual quarters. Doses from liquid effluents are based on the concentration (activity divided by volume) of radionuclides released in the effluent, as prescribed by the NRC in Regulatory Guide 1.109. If a larger proportion of activity is released with a relatively smaller volume of dilution water during a given quarter, the resulting concentration for that quarter will be higher than concentrations from other quarters. This will result in a proportionally higher dose for that quarter. However, when that quarter's activity values are included in the annual sum, and divided by the total annual dilution flow, the resulting dose contribution will be smaller. In such a situation, the annual dose will actually be less than the sum of the individual quarterly doses.

There were no liquid Effluent releases from PNPS during 2018, therefore the Radioactivity released in liquid effluents from PNPS during the reporting period resulted in a maximum total body dose (teen age class) of 0.00 mrem. The maximum organ dose (teen age class, Liver) was 0.00 mrem.

Page 28

Table 4.3-A Maximum Individual Organ Doses -- mrem From Liquid Release Period: Jan-Mar 2018 Age Class Organ Dose - mrem

• Organ Adult Teen Child Bone N/A N/A N/A GI-LLI N/A N/A N/A Kidney N/A N/A NIA Liver N/A N/A NIA Lung N/A NIA N/A Thyroid NIA NIA N/A T.Body N/A N/A N/A

• These doses are conservative since the same usage factor was applied for each quarter.

In reality, it is unlikely that anyone would be swimming or boating during the entire year.

However, the resulting dose is considerably lower than those from other pathways and does not contribute much to the total dose.

- Highest total body dose and highest organ dose are bolded.

Page 29

Table 4.3-B Maximum Individual Organ Doses -- mrem From Liquid Release Period: Apr-Jun 2018 Age Class Organ Dose - mrem Organ Adult Teen Child Bone NIA NIA NIA GI-LU NIA NIA NIA Kidney NIA NIA NIA Liver NIA NIA NIA Lung NIA NIA NIA Thyroid NIA NIA NIA T.Body NIA NIA NIA

-Highest total body dose and highest organ dose are bolded.

Page 30

Table 4.3-C Maximum Individual Organ Doses -- mrem From Liquid Release Period: Jul-Sep 2018 Age Class Organ Dose - mrem Organ Adult Teen Child Bone NIA NIA NIA GI-LU NIA NIA NIA Kidney NIA NIA NIA Liver NIA NIA NIA Lung NIA NIA NIA Thyroid NIA NIA NIA T.Body NIA NIA NIA Page 31

Table 4.3-D Maximum Individual Organ Doses -- mrem From Liquid Release Period: Oct-Dec 2018 Age Class Organ Dose - mrem

• Organ Adult Teen Child Bone NIA NIA NIA GI-LLI NIA NIA NIA Kidney NIA NIA NIA Liver NIA NIA NIA Lung NIA NIA NIA Thyroid NIA NIA NIA T.Body NIA NIA NIA

• These doses are conservative since the same usage factor was applied for each quarter.

In reality, it is unlikely that anyone would be swimming or boating during these months.

However, the resulting dose is considerably lower than those from other pathways and does not contribute much to the total dose.

Page 32

Table 4.3-E Maximum Individual Organ Doses -- mrem From Liquid Release Period: Jan-Dec 2018 Age Class Organ Dose - mrem

• Organ Adult Teen Child Bone N/A N/A N/A GI-LLI N/A N/A N/A Kidney N/A N/A N/A Liver N/A N/A N/A Lung N/A N/A N/A Thyroid N/A N/A NIA T.Body N/A N/A N/A

• These doses are conservative since the same usage factor was applied for each quarter.

In reality, it is unlikely that anyone would be swimming or boating during the entire year.

However, the resulting dose is considerably lower than those from other pathways and does not contribute much to the total dose.

-Highest total body dose and highest organ dose are bolded.

Page 33

5.0 OFFSITE AMBIENT RADIATION MEASUREMENTS The PNPS ODCM does not contain control limits related specifically to offsite ambient radiation exposure. However, Regulatory Guide 1.21 (Reference 1) recommends calculation of ambient radiation exposure as part of the overall assessment of radiological impact on man.

Thermoluminescent dosimeters (TLDs) are located at 86 sites beyond the boundary of the PNPS restricted/protected area. A number of these TLDs are located within the site boundary, on Entergy property in close proximity to the station proper. The TLDs are collected on a quarterly basis and used to calculate the ambient radiation exposure in milliRoentgen (mR) over the exposure period.

These TLDs are grouped into four zones of increasing distance from the station . Average exposure values for each of these zones were calculated for each calendar quarter and the total year. The average exposure values (mR) for the four zones are presented in Table 5.0.

In addition to responding to ambient radiation exposure, TLDs will also record radiation resulting from noble gases (plume and immersion exposure), particulate materials deposited on the ground, cosmic rays from outer space, and from naturally-occurring radioactivity in the soil and air. Typically, the exposure from cosmic rays and other natural radioactivity components is approximately 40 to 70 mR/year. As calculated in Sections 4.1 and 4.2 of this report, the ambient radiation component of doses from PNPS effluent emissions are below 1 mrem/yr and would not be discernible above the natural radiation exposure levels.

The major source of ambient radiation exposure from PNPS results from high-energy gamma rays emitted from nitrogen-16 (N-16) contained in steam flowing through the turbine. Although the N-16 is enclosed in the process lines and turbine and is not released into the environment, the ambient radiation exposure and sky shine from this contained source accounts for the majority of the radiation dose, especially in close proximity to the station. Other sources of ambient radiation exposure include radiation emitted from contained radioactive materials and/or radwaste at the facility . Despite these sources of ambient radiation exposure at PNPS, increases in exposure from ambient radiation are typically not observable above background levels at locations beyond Entergy controlled property.

The average exposure values presented in Table 5.0 appear to indicate an elevation in ambient exposures in Zone 1, those TLDs within 2 miles of PNPS. Most of this elevation is due to increases in exposure levels measured at TLD locations on Entergy property in close proximity to the station proper. For example, the annual exposure at TLD location OA, located at the Overlook Area near the PNPS Health Club (l&S Building), was 195 mR for the entire year. This location is immediately adjacent to the station proper and overlooks the turbine building, therefore receiving the highest direct ambient and sky shine exposure. When the near-site TLDs (those located within 0.6 km of the Reactor Building) are removed from the calculation of averages, the mean annual exposure in Zone 1 fa lls from 75.5 +/- 26.3 mR/yr to 57.4 +/- 8.7 mR/yr. Such a corrected dose is not statistically different from the Zone 4 average of 60.1 +/- 8.5 mR/yr, and is indicative of natural background radiation .

Although the annual exposure at TLD location OA was 135 mR above the average Zone 4 exposure, members of the general public do not continuously occupy this area. When adjusted for such occupancy, a hypothetical member of the public who was at this location for 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> per year would only receive an incremental dose of 2.7 mrem over natural background radiation levels. At the nearest residence 0.8 kilometers (0.5 miles) southeast of the PNPS Reactor Building, the annual exposure was calculated as being 61 .7 +/- 3.5 mR (based on continuous occupancy at this location),

which compares quite well to the Zone 4 annual average background radiation level of 60.1 +/- 8.5 mR. Statistically, there is no difference between these two values.

Page 34

Pilgrim Station began moving spent fuel to the Independent Spent Fuel Storage Installation (ISFSI) located within the protected area immediately west of the PNPS Reactor Building. Three new TLDs were installed at the beginning of 2016 to monitor any incremental dose from this facility. TLD ISF-1 was located on Rocky Hill Road 0.35 km (0.21 mi) southwest of the reactor building. The annual exposure at this location was calculated as being 76.9 +/- 2.4 mR (based on continuous occupancy at this location), or 16.8 mR above the Zone 4 average of 60.1 mR. However, the area is not continuously occupied, and when corrected for an exposure time of 365 hour0.00422 days <br />0.101 hours <br />6.035053e-4 weeks <br />1.388825e-4 months <br />s/year, the estimated exposure to a person walking along this section of Rocky Hill Road would be 0.70 mR/year.

It must be emphasized that the projected ambient exposures discussed above and on the previous page are calculated to occur to a maximum-exposed hypothetical individual. Even though conservative assumptions are made in the projection of these dose consequences, all of the projected doses are well below the NRC dose limit of 100 mrem/yr specified in 10CFR20.1301, as well as the EPA dose limit of 25 mrem/yr specified in 40CFR190. Both of these limits are to be applied to real members of the general public, so the fact that the dose to the hypothetical maximum-exposed individual is within the limits ensures that any dose received by a real member of the public would be smaller and well within any applicable limit.

In 1994, Pilgrim Station opened the old training facility (l&S Building) overlooking the plant as a health club for its employees. This site is immediately adjacent to the protected area boundary near monitoring location QA and receives appreciable amounts of direct ambient and sky shine exposure from the turbine building. Although personnel using this facility are employees of Entergy, they are considered to be members of the public. Due to their extended presence in the facility (500 hr/yr, assuming utilization of the facility for 2 hr/day, 5 days a week, for 50 weeks/yr), these personnel represent the most conservative case in regards to ambient radiation exposure to a member of the public within the PNPS owner controlled area. Their annual incremental radiation dose above background during 2018 is estimated as being approximately 1.6 mrem, based on the average exposure measured by the TLD in the building.

The exposures measured by the TLD located in the health club would also include any increase in ambient radiation resulting from noble gases and/or particulate activity deposited on the ground from gaseous releases. However, they would not indicate any internal dose received by personnel in this facility from inhalation of small amounts of PNPS-related radioactivity contained in the air. An environmental air sampler located immediately adjacent to the health club did not indicate any PNPS-related activity during 2018. Dose calculations performed in the same manner as those outlined in Section 4.2 for airborne effluent releases yielded a projected total body dose to the maximum-exposed individual (500 hr/yr exposure) of approximately 0.0378 mrem, resulting from inhalation.

Again, it must be emphasized that the above-described exposures were received by personnel who are employees or contractors of Entergy, accessing areas or facilities on property under the ownership and control of Entergy. Since this exposure was received within the owner-controlled area, it is not used for comparison to the annual dose limit of 25 mrem/yr specified in 40CFR 190.

This regulation explicitly applies to areas at or beyond the owner-controlled property, and is not applicable in this situation. As stated earlier, TLDs at and beyond the site boundary do not indicate elevated ambient radiation levels resulting from the operation of Pilgrim Station.

Although some of the TLDs in close proximity to PNPS indicate increases in exposure levels from ambient radiation, such increases are localized to areas under Entergy control. For members of the general public who are not employed or contracted with Entergy and are accessing Entergy controlled areas (e.g., parking lots, etc.), such increases in dose from ambient radiation exposure are estimated as being less than 0.6 mrem/year.

Page 35

Table 5.0 Average TLD Exposures By Distance Zone During 2018 Average Exposure +/- Standard Deviation: mR/::,eriod Exposure Zone 1* Zone 2 Zone 3 Zone 4 Period 0-3 km 3-8 km 8-15 km >15 km Jan-Mar 18.9 +/- 6.1 14.2 +/- 3.4 14.4 +/- 1.2 15.1+/-2.4 Apr-Jun 18.7 +/- 7.0 13.8 +/- 2.0 13.1 +/- 1.6 14.3 +/- 2.0 Jul-Sep 18.8 +/- 7.3 14.0 +/- 2.0 13.7+/-1.3 14.8 +/- 2.1 Oct-Dec 18.9 +/- 6.1 15.2 +/- 2.0 14.9 +/- 1.4 15.9 +/- 2.2 Jan-Dec 75.3 +/- 26.3 57.2 +/- 9.7 56.0 +/- 6.0 60.1 +/- 8.5

• Zone 1 extends from the PNPS restricted/protected area boundary outward to 3 kilometers (2 miles), and includes several TLDs located within the site boundary.

• • When corrected for TLDs located within the site boundary, the Zone 1 annual average is calculated to be 62.1 +/- 8.0 mR/yr.

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6.0 PERCENT OF ODCM EFFLUENT CONTROL LIMITS The PNPS ODCM contains dose and concentration limits for radioactive effluents. In addition, the effluent controls specified ensure that radioactive releases are maintained as low as reasonably achievable. The percentage of the PNPS ODCM Control limit values were determined from doses calculated in Section 4, the effluent releases summarized in Section 2, and the ODCM Control limits/objectives listed in Tables 6.1 and 6.2.

The percent of applicable control limit values are provided to supplement the information provided in the Section 2 of this report. The format for the percent of applicable limits is modified from that prescribed in Regulatory Guide 1.21 (Reference 1) to accommodate the Radioactive Effluents Technical Specifications (RETS) that became effective March 01, 1986. The percentages have been grouped according to whether the releases were via liquid or gaseous effluent pathways.

6.1 Gaseous Effluent Releases Dose-based effluent controls related to exposures arising from gaseous effluent releases are presented in Table 6.1. The maximum quarterly air doses and annual whole body doses listed in Table 4.1 were used to calculate the percentage values shown in Table 6.1. All doses resulting from noble gas exposure were a small percentage of the applicable effluent control.

Organ dose limits for the maximum-exposed individual from radioactive particulates, iodines, and tritium from the PNPS ODCM are also shown in Table 6.1. The maximum quarterly and annual organ doses from Tables 4.2-A through 4.2-E were used to calculate the percentages shown in Table 6.1. The resulting organ doses from Pilgrim Station's gaseous releases during 2018 were a small percentage of the corresponding effluent control.

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Table 6.1 Percent of ODCM Effluent Control Limits for Gaseous Effluent Releases During 2018 A. Instantaneous Dose Rate Limit - Noble Gases PNPS ODCM Control 3.3.1.a Limit: 500 mrem/yr Total Body Dose Period Value - mrem/yr Fraction of Limit Jan-Dec 5.48E-04 1.10E-04%

B. Instantaneous Dose Rate Limit - Noble Gases PNPS ODCM Control 3.3.1.a Limit: 3000 mrem/yr Skin Dose Period Value - mrem/yr Fraction of Limit Jan-Dec 2.97E-03 9.91E-05%

C. Instantaneous Dose Rate Limit - Particulates, Iodines, & Tritium PNPS ODCM Control 3.3.1.b Limit: 1500 mrem/yr Organ Dose Period Value - mrem/yr Fraction of Limit Jan-Dec 6.46E-02 4.31 E-01 %

D. Quarterly Dose Objective - Noble Gas Gamma Air Dose PNPS ODCM Control 3.3.2.a Objective: 5 mrad Gamma Air Dose Period Value- mrad Fraction of Limit Jan-Mar O.OOE+OO O.OOE+00%

Apr-Jun 2.38E-04 4.77E-03%

Jul-Sep 2.36E-04 4.71E-03%

Oct-Dec 3.57E-04 7.14E-03%

E. Annual Dose Objective - Noble Gas Gamma Air Dose PNPS ODCM Control 3.3.2.b Objective: 10 mrad Gamma Air Dose Period Value - mrad/yr Fraction of Limit Jan-Dec 8.31 E-04 8.31E-03%

Page 38

Table 6.1 (continued)

Percent of ODCM Effluent Control Limits for Gaseous Effluent Releases During 2018 F. Quarterly Dose Objective - Noble Gas Beta Air Dose PNPS ODCM Control 3.3.2.a Objective: 10 mrad Beta Air Dose Period Value - mrad Fraction of Limit Jan-Mar O.OOE+OO O.OOE+00%

Apr-Jun 8.82E-04 8.82E-03%

Jul-Sep 8.72E-04 8.72E-03%

Oct-Dec 1.32E-03 1.32E-02%

G. Annual Dose Objective - Noble Gas Beta Air Dose PNPS ODCM Control 3.3.2.b Objective: 20 mrad Beta Air Dose Period Value - mrad/yr Fraction of Limit Jan-Dec 3.08E-03 1.54E-02%

H. Quarterly Dose Objective - Particulates, Iodines, Tritium, and Carbon-14 PNPS ODCM Control 3.3.3.a Objective: 7.5 mrem Organ Dose Period Value - mrem Fraction of Limit Jan-Mar 1.45E-02 1.93E-01 %

Apr-Jun 1.42E-02 1.89E-01 %

Jul-Sep 1.73E-02 2.30E-01%

Oct-Dec 1.86E-02 2.49E-01 %

I. Annual Dose Objective - Particulates, Iodines, Tritium, and Carbon-14 PNPS ODCM Control 3.3.3.b Objective: 15 mrem Organ Dose Period Value - mrem/yr Fraction of Limit Jan-Dec 6.46E-02 4.31 E-01 %

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6.2 Liquid Effluent Releases Liquid effluent concentration limits and dose objectives from the PNPS ODCM are shown in Table 6.2. The quarterly average concentrations from Table 2.3-A were used to calculate the percent concentration limits. The maximum quarterly and annual whole body and organ doses from Tables 4.3-A through 4.3-E were used to calculate the percentages shown in Table 6.2. The resulting concentrations, as well as organ and total body doses from Pilgrim Station's liquid releases during the reporting period were a small percentage of the corresponding effluent controls.

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Table 6.2 Percent of ODCM Effluent Control Limits for Liquid Effluent Releases During 2018 A. Fission and Activation Product Effluent Concentration Limit PNPS ODCM Control 3.2.1 Limit: 10CFR20 Appendix B, Table 2, Column 2 Value Period Value - µCi/ml Fraction of Limit Jan-Mar NIA N/A Apr-Jun NIA N/A Jul-Sep N/A N/A Oct-Dec N/A N/A Jan-Dec N/A N/A B. Tritium Average Concentration Limit PNPS ODCM Control 3.2.1 Limit: 1.0E-03 ~tCi/ml Period Value - µCi/ml Fraction of Limit Jan-Mar N/A N/A Apr-Jun N/A N/A Jul-Sep N/A NIA Oct-Dec N/A N/A Jan-Dec NIA N/A C. Dissolved and Entrained Noble Gases Concentration Limit PNPS ODCM Control 3.2.1 Limit: 2.0E-04 µCi/ml Period Value - µCi/ml Fraction of Limit Jan-Mar N/A NIA Apr-Jun N/A N/A Jul-Sep N/A N/A Oct-Dec NIA N/A Jan-Dec N/A N/A Page 41

Table 6.2 (continued)

Percent of ODCM Effluent Control Limits for Liquid Effluent Releases During 2018 D. Quarterly Total Body Dose Objective PNPS ODCM Control 3.2.2.a Objective: 1.5 mrem Total Body Dose Period Value - mrem Fraction of Limit Jan-Mar N/A N/A Apr-Jun N/A N/A Jul-Sep N/A N/A Oct-Dec N/A N/A E. Annual Total Body Dose Objective PNPS ODCM Control 3.2.2.b Objective: 3 mrem Total Body Dose Period Value - mrem Fraction of Limit Jan-Dec N/A N/A F. Quarterly Organ Dose Objective PNPS ODCM Control 3.2.2.a Objective: 5 mrem Organ Dose Period Value - mrem Fraction of Limit Jan-Mar N/A N/A Apr-Jun N/A N/A Jul-Sep N/A N/A Oct-Dec N/A N/A G. Annual Organ Dose Objective PNPS ODCM Control 3.2.2.b Objective: 10 mrem Organ Dose Period Value - mrem Fraction of Limit Jan-Dec N/A N/A Page 42

7.0 RADIOACTIVE WASTE DISPOSAL DATA Radioactive wastes that were shipped offsite for processing and disposal during the reporting period are described in Table 7.0, in the standard NRC Regulatory Guide 1.21 format.

The total quantity of radioactivity in Curies and the total volume in cubic meters are summarized in Table 7.0 for the following waste categories:

• Spent resins, filter sludges, and evaporator bottoms;

• Dry activated wastes, contaminated equipment, etc.;

• Irradiated components, control rods, etc.; and,

• Other.

During the reporting period approximately 91.8 cubic meters of spent resins, filter sludges, etc.,

containing a total activity of approximately 416 Curies were shipped from PNPS for processing and disposal. Dry activated wastes and contaminated equipment shipped during the period totaled 451 cubic meters and contained 1.88 Curies of radioactivity. There were no shipments of irradiated components during the reporting period. There were no shipments of "Other wastes" during the reporting period. There were no shipments of irradiated fuel during the reporting period.

Estimates of principal radionuclides, those comprising greater than 1% of the total activity in each waste category shipped, are listed in Table 7.0. There were 27 shipments to Energy Solutions' Bear Creek Facility in Oak Ridge, TN and 1 shipments to Energy Solutions Erwin Resin Solutions' Facility in Erwin, TN.

Page 43

Table 7.0 Pilgrim Nuclear Power Station Annual Radioactive Effluent Release Report Solid Waste and Irradiated Fuel Shipments January-December 2018 A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (Not irradiated fuel)

1. Estimate of volume and activity content by type of waste Jan-Dec 2018 Type of waste Volume-mJ Curies Total Error

a. Spent resins, filters, filter sludges, 9.18E+01 4.16E+02 +/- 25%

evaporator bottoms, etc.

b. Dry activated waste, contaminated 4.51E+02 1.88E+OO +/-25%

equipment, etc.

C. Irradiated components, control rods, etc. O.OOE+OO O.OOE+OO NIA

d. Other (describe): O.OOE+OO O.OOE+OO NIA

2. Estimate of major nuclide composition by type of waste 1 Type of waste Radionuclide Abundance Total Error

a. Spent resins, filters, filter sludge's, Mn-54 19.26% +/-25%

evaporator bottoms, etc. Fe-55 27.69% +/-25%

Co-60 21.20% +/-25%

Zn-65 25.8% +/-25%

Cs-137 3.33% +/-25%

b. Dry activated waste, contaminated Mn-54 1.51% +/- 25%

equipment, etc. Fe-55 72.90% +/- 25%

Co-60 22.95% +/- 25%

Ni-63 1.90% +/- 25%

c. Irradiated components, control rods, etc. NIA NIA NIA

d. Other (describe): Contaminated oil and water NIA NIA NIA

,. . . 0 I "

MaJor' 1s defined as any rad1onuc/Jde compnsing >1% of the total activity in the waste category.

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination Tractor-trailer Energy Solutions, Bear Creek Facility L 27 (Hittman Transport) Oak Ridge, TN Tractor-trailer Energy Solutions, Erwin Resin Solutions L 1

(Hittman Transport) Erwin, TN

' This processor provides volume reduction services for dry compressible waste, contaminated eqwpment, etc.

Remaining radioactive wastes will be shipped to Envirocare, Inc. in Clive, UT for final disposal.

B. IRRADIATED FUEL SHIPMENTS & DISPOSITION Number of Shi ments Mode of Trans ortation Destination None NIA NIA Page 44

8.0 OFFSITE DOSE CALCULATION MANUAL REVISIONS The PNPS Offsite Dose Calculation Manual (ODCM) was not revised during the calendar year of 2018.

Page 45

9.0 PROCESS CONTROL PROGRAM REVISIONS The following list summarizes changes made during 2018 to various procedures related to the Process Control Program (PCP):

EN-RW-102, "Radioactive Shipping Procedure", Rev. 15 &16:

Rev 15:

The purpose of th is revision is to add instruction for contacting ANI in the event of off-normal shipment of Radioactive Materials (CR-HQN-2016-00874) and to add an option for use of type B(U) and B(M) packaging (CR-HQN-2016-00869).

• Step 2.0(16]: added reference to ANI Guideli ne 15-02

• Step 3.0(5]: added definition for Special Shipment (from ANI 15-02)

• Step 5.1(14] and preceding Note: added step for advance notification of ANI of Special Shipments

• Step 5.2(16]: revised Flow Chart 1 and Flow Chart 2 to reflect contacting ANI for Special Shipments

• Section 8.0: updated commitment number per GGNS Commitment Review. .2, step 4: added item for Type B(U) or B(M) packaging; added "Exel Use SCO" to 5th bullet item.

Rev 16:

The purpose of this revision is remove GGNS section 8.0 items that are not commitments. This revision is non-editorial for GGNS and editorial for the rest of the fleet.

• Deleted GGNS line items from section 8.0 that are not actually commitments.

• Updated coversheet Page 46

10.0 REFERENCES

1. U.S. Nuclear Regulatory Commission, "Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water Cooled Nuclear Power Plants", Regulatory Guide 1.21, Revision 1, June 1974.

2. "Pilgrim Nuclear Power Station Offsite Dose Calculation Manual", Revision 10, May 2009.

3. U.S. Nuclear Regulatory Commission, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR50 Appendix I", Regulatory Guide 1.109, Revision 1, October 1977.

4. U.S. Nuclear Regulatory Commission, "Methods for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine Releases from Light-Water-Cooled Reactors",

Regulatory Guide 1.111, July 1977.

5. Boston Edison Company, "Pilgrim Station Unit 1 Appendix I Evaluation", April 1977.

6. Entech Engineering Inc., P100-R19, "AEOLUS A Computer Code for the Determination of Atmospheric Dispersion and Deposition of Nuclear Power Plant Effluents During Continuous, Intermittent and Accident Conditions in Open-Terrain Sites, Coastal Sites and Deep-River Valleys".

7. U.S. Nuclear Regulatory Commission, "XOQDOQ: Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations", NUREG/CR2919, September 1982.

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APPENDIX A Meteorological Joint Frequency Distributions TABLE TABLE TITLE PAGE A-1 Joint Frequency Distribution of Wind Directions and Speeds for the 49 33-ft Level of the 220-ft Tower A-2 Joint Frequency Distribution of Wind Directions and Speeds for the 59 220-ft Level of the 220-ft Tower Page 48

Table A-1 Joint Frequency Distribution of Wind Directions and Speeds For the 33-ft level of the 220-ft Tower Jan-Mar 2018 Class A Frea: 0.113 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 0 3 2 1 0 0 0 0 0 0 0 0 0 0 5 12 3.5-7.5 21 30 3 17 7 0 1 2 4 5 0 2 9 31 12 5 149 7.5-12.5 0 23 0 0 0 0 1 0 0 6 5 7 23 15 1 0 81 12.5-18.5 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 22 53 6 19 8 0 2 2 4 12 5 9 32 46 13 10 243 Class B Freq: 0.065 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 2 1 0 0 0 0 0 2 0 0 0 0 1 6 3.5-7.5 6 6 3 2 1 0 0 0 2 3 1 3 10 15 19 8 79 7.5-12.5 1 10 0 0 0 0 0 2 5 11 2 2 13 6 0 0 52 12.5-18.5 0 0 1 0 0 0 0 2 1 0 0 0 0 0 0 0 4 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 7 16 4 4 2 0 0 4 8 14 5 5 23 21 19 9 141 Class C Freq: 0.078 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 1 3 5 1 0 0 1 0 1 1 0 1 0 1 0 15 3.5-7.5 2 13 0 2 1 3 1 0 4 11 4 8 18 9 6 6 88 7.5-12.5 0 17 1 2 0 0 0 2 8 8 3 2 15 0 2 4 64 12.5-18.5 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 2 32 4 9 2 3 1 3 13 20 8 10 34 9 9 10 169 Class D Freq: 0.558 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 7 8 6 13 2 2 2 7 6 8 12 9 15 19 10 9 135 3.5-7.5 8 35 38 19 6 9 23 26 61 53 59 109 78 82 48 18 672 7.5-12.5 22 77 17 5 2 1 6 6 32 74 21 13 34 12 8 8 338 12.5-18.5 6 19 3 2 0 0 0 0 21 6 0 0 0 0 0 0 57 18.5-24 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 43 141 64 39 10 12 31 39 120 141 92 131 127 113 66 35 1204 Page 49

Table A-1 (continued)

Jan-Mar 2018 C lass E Frea: 0 164 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtm NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0.95-3.5 13 9 2 6 3 1 3 1 6 4 2 12 19 8 10 6 105 3.5-7.5 3 17 7 0 0 0 4 8 17 23 33 27 24 8 4 5 180 7 .5-12.5 0 7 2 0 0 0 0 3 2 35 3 3 2 1 0 0 58 12.5-18.5 0 9 1 0 0 0 0 0 0 0 0 0 0 0 0 0 10 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 16 42 12 6 3 1 7 12 25 62 38 43 45 17 14 11 354 Cl ass F Frea: 0 021 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtm NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 1 0 0 0 0 2 2 1 5 5 2 5 0 0 23 3.5-7.5 0 0 0 0 0 0 2 1 0 5 1 4 0 1 1 1 16 7.5-12.5 0 0 0 0 0 0 0 0 0 2 4 0 0 0 0 0 6 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 0 1 0 0 0 2 3 2 8 10 9 2 6 1 1 45 Cl ass G Frea : 0 001 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtm NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 2 3.5-7.5 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 7.5-12.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12.5- 18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 0 0 0 0 0 1 0 0 0 0 2 0 0 0 0 3 Cl ass All Frea: 1 000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtm NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0.95-3.5 21 18 15 28 8 3 6 11 14 14 22 27 37 32 21 21 298 3.5-7.5 40 101 51 40 15 12 31 37 88 100 98 154 139 146 90 43 1185 7.5-12.5 23 134 20 7 2 1 7 13 47 136 38 27 87 34 11 12 599 12.5-18.5 6 29 5 2 0 0 0 2 23 7 0 0 0 0 0 0 74 18.5-24 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 90 284 91 77 25 16 44 63 172 257 158 209 263 212 122 76 2159 Page 50

Table A-1 (continued)

Apr-Jun 2018 Cl ass A F rea: O 110 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 5 1 2 5 7 0 0 0 0 0 0 0 0 0 1 3 24 3.5-7.5 7 23 37 19 15 14 4 1 1 0 1 5 10 12 14 4 167 7.5-12.5 0 3 5 0 0 0 4 0 9 14 1 3 11 0 0 0 50 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 12 27 44 24 22 14 8 1 10 14 2 8 21 12 15 7 241 Class B Freq: 0.043 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 3 1 4 2 1 0 0 0 0 0 0 0 2 1 0 1 15 3.5-7.5 3 1 4 2 4 2 3 0 0 3 2 13 2 3 0 0 42 7.5-12.5 0 0 5 6 0 0 1 2 4 9 7 1 1 0 0 0 36 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 6 2 13 10 5 2 4 2 4 12 9 14 5 4 0 1 93 C lass C Frea: 0.062 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 2 5 3 5 4 2 0 0 0 0 0 0 0 1 0 4 26 3.5-7.5 1 2 11 6 11 3 10 3 1 12 7 10 3 2 0 0 82 7.5-12.5 0 0 2 2 0 0 1 3 12 5 1 0 1 0 0 0 27 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 3 7 16 13 15 5 11 6 13 17 8 10 4 3 0 4 135 Cl ass D Frea: 0.404 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 3 0.95-3.5 23 26 24 26 17 9 12 9 16 13 5 12 3 9 17 22 243 3.5-7.5 10 15 11 15 31 32 28 19 67 91 40 30 49 10 7 8 463 7.5-12.5 0 0 7 2 3 4 14 15 28 80 5 1 11 0 0 0 170 12.5-18.5 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 3 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 33 41 42 43 51 45 57 44 111 184 50 44 64 19 24 30 882 Page 51

Table A-1 (continued)

Apr-Jun 2018 Cl ass E F reci: 0 279 mch N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 4 8 18 20 18 7 7 11 10 7 8 22 24 20 10 10 204 3.5-7.5 0 1 3 11 8 6 10 24 34 88 53 19 30 5 3 3 298 7.5-12.5 0 0 0 0 0 1 1 2 6 73 20 0 3 0 0 0 106 12.5-18.5 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 2 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 4 9 21 31 26 14 19 37 50 169 81 41 57 25 13 13 610 Class F F reci: 0 079 mch N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 3 8 11 5 1 2 1 2 2 5 13 18 13 1 9 95 3.5-7.5 0 0 1 2 2 0 0 0 4 11 29 7 1 3 1 0 61 7.5-12.5 0 0 0 0 0 0 0 0 0 5 12 0 0 0 0 0 17 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 1 3 9 13 7 1 2 1 6 18 46 20 19 16 2 9 173 Class G Freci: 0 023 mch N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 1 0 1 1 0 0 1 0 2 1 5 0 0 1 0 13 3.5-7.5 0 0 0 0 0 0 0 0 0 1 13 1 0 0 0 0 15 7.5- 12.5 0 0 0 0 0 0 0 0 0 5 16 0 0 0 0 0 21 12.5- 18.5 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 1 0 1 1 0 0 1 0 9 30 6 0 0 1 0 50 Class All F reci: 1 000 mch N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 3 0.95-3.5 38 45 59 70 53 19 21 22 28 24 19 52 47 44 30 49 620 3.5-7.5 21 42 67 55 71 57 55 47 107 206 145 85 95 35 25 15 1128 7.5-12.5 0 3 19 10 3 5 21 22 59 191 62 5 27 0 0 0 427 12.5-18.5 0 0 0 0 0 0 3 1 0 2 0 0 0 0 0 0 6 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 59 90 145 135 127 81 101 92 194 423 226 143 170 79 55 64 2184 Page 52

Table A-1 (continued)

Jul-Sep 2018 Class A Frea: 0.011 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 3 0 3 1 0 0 0 0 0 0 0 0 0 0 0 0 7 3.5-7.5 0 5 4 1 0 2 0 1 0 0 1 0 0 0 0 0 14 7.5-12 .5 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 2 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 3 5 7 2 0 2 0 1 2 0 1 0 0 0 0 0 23 Cl ass B Frea: 0 014 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 3 2 0 0 0 0 0 0 0 0 0 1 0 0 6 3.5-7.5 0 10 7 0 0 2 1 1 0 0 0 0 0 0 0 0 21 7.5-12.5 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 2 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 10 10 2 0 2 1 2 1 0 0 0 0 1 0 0 29 Cl ass C Frea: 0 012 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 1 0 1 0 0 0 0 0 0 0 0 1 0 1 4 3.5-7.5 0 9 5 1 1 0 0 0 2 2 1 0 0 0 0 0 21 7.5-12.5 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 9 6 1 2 0 0 0 3 2 1 0 0 1 0 1 26 Cl ass D Frea : 0 360 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 9 31 53 23 17 12 9 3 10 8 4 6 6 1 6 6 204 3.5-7.5 5 81 22 5 12 40 35 33 67 140 30 1 0 1 0 2 474 7.5-12.5 0 0 0 0 0 3 10 21 22 29 5 0 0 0 0 0 90 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 14 112 75 28 29 55 54 57 99 177 39 7 6 2 6 8 768 Page 53

Table A-1 (continued)

Jul-Sep 2018 Class E Frea: 0.434 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 1 0 0 0 0 2 1 2 0 0 6 0.95-3.5 12 23 20 23 44 14 23 20 21 9 21 29 35 28 22 30 374 3.5-7.5 3 17 4 4 10 14 38 21 81 111 107 25 6 3 2 4 450 7.5-12.5 0 0 0 0 0 0 3 20 35 24 14 0 0 0 0 0 96 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 15 40 24 27 54 28 65 61 137 144 142 56 42 33 24 34 926 Class F Frea: 0.147 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 3 0.95-3.5 3 4 16 41 17 5 1 8 8 17 21 44 15 3 4 11 218 3.5-7.5 0 0 0 5 2 0 1 0 4 14 55 2 0 0 2 0 85 7.5- 12.5 0 0 0 0 0 0 0 0 0 2 6 0 0 0 0 0 8 12.5- 18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 3 4 16 46 19 5 2 8 12 33 82 48 15 3 7 11 314 Class G Frea : 0.023 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 2 2 2 9 4 0 0 0 1 1 7 10 1 0 1 0 40 3.5-7.5 0 0 0 0 0 0 0 0 0 0 9 0 0 0 0 0 9 7.5-12.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 2 2 2 9 4 0 0 0 1 1 16 10 1 0 1 0 49 Class All Freq: 1.000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 1 0 0 0 0 4 1 2 1 0 9 0.95-3.5 29 60 98 99 83 31 33 31 40 35 53 89 57 34 33 48 853 3.5-7.5 8 122 42 16 25 58 75 56 154 267 203 28 6 4 4 6 1074 7.5-12.5 0 0 0 0 0 3 13 42 61 55 25 0 0 0 0 0 199 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 37 182 140 115 108 92 122 129 255 357 281 121 64 40 38 54 2135 Page 54

Table A-1 (continued)

Oct-Dec 2018 Cl ass A Frea: 0. 014 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 2 0 0 0 0 0 0 0 0 0 1 2 1 0 0 7 3.5-7.5 0 1 0 0 0 0 0 0 1 0 0 2 1 1 2 1 9 7.5-12.5 0 0 0 1 0 0 0 0 0 2 2 1 2 4 1 0 13 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 1 3 0 1 0 0 0 0 1 2 2 4 5 6 3 1 29 Class B Frea: 0.012 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 3.5-7.5 0 1 0 0 1 1 0 0 0 0 0 0 2 3 4 1 13 7.5-12.5 0 0 0 0 0 0 0 0 1 4 2 0 1 2 1 0 11 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 1 0 0 1 1 0 0 1 4 2 0 4 5 5 1 25 Class C Frea: 0.023 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 3 3.5-7.5 2 1 0 0 4 1 0 0 0 1 3 1 4 8 5 4 34 7.5-12.5 0 0 0 0 1 0 0 0 1 3 0 0 1 6 0 0 12 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 2 1 1 0 5 1 0 0 1 4 3 2 6 14 5 4 49 C lass D Frea: 0.605 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 28 12 16 9 11 1 3 8 8 6 17 33 14 15 18 15 214 3.5-7.5 19 25 21 18 21 39 18 18 30 93 81 157 140 119 77 23 899 7.5-12.5 2 7 10 7 7 5 14 7 17 19 5 6 15 32 10 3 166 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 49 44 47 34 39 45 35 33 55 118 103 196 169 166 105 41 1279 Page 55

Table A-1 (continued)

Oct-Dec 2018 Class E Frea: 0.305 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 12 21 4 4 5 7 8 13 20 22 45 38 36 10 7 6 258 3.5-7.5 1 3 5 1 6 6 22 31 31 38 99 52 31 6 5 2 339 7.5-12.5 0 0 2 0 2 0 6 5 11 10 3 0 0 0 0 0 39 12.5-18.5 0 0 0 0 0 0 0 8 0 0 0 0 0 0 0 0 8 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 13 24 11 5 13 13 36 57 62 70 147 90 67 16 12 8 644 Class F Frea: 0.039 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 0 2 1 0 2 1 2 1 6 18 7 1 0 3 1 46 3.5-7.5 0 0 0 0 0 0 0 0 2 6 27 0 0 0 0 0 35 7.5-12.5 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 1 0 2 1 0 2 1 2 3 12 46 7 1 0 3 1 82 Class G Frea: 0.002 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 0 1 0 1 0 0 0 0 1 1 0 0 0 0 0 5 3.5-7.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7.5-12.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 1 0 1 0 1 0 0 0 0 1 1 0 0 0 0 0 5 Class All Frea: 1.000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 43 35 24 14 17 10 12 23 29 35 81 80 55 26 28 22 534 3.5-7.5 22 31 26 19 32 47 40 49 64 138 210 212 178 137 93 31 1329 7.5-12.5 2 7 12 8 10 5 20 12 30 38 13 7 19 44 12 3 242 12.5-18.5 0 0 0 0 0 0 0 8 0 0 0 0 0 0 0 0 8 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 67 73 62 41 59 62 72 92 123 211 304 299 252 207 133 56 2113 Page 56

Table A-1 (continued)

Jan-Dec 2018 Cl ass A Freq: O 062 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 10 3 8 8 8 0 0 0 0 0 0 1 2 1 1 8 50 3.5-7.5 28 59 44 37 22 16 5 4 6 5 2 9 20 44 28 10 339 7.5-12.5 0 26 5 1 0 0 5 0 11 22 8 11 36 19 2 0 146 12.5-18.5 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 38 88 57 46 30 16 10 4 17 28 10 21 58 64 31 18 536 Cl ass B Freq: 0.034 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 3 1 7 6 2 0 0 0 0 0 2 0 3 2 0 2 28 3.5-7.5 9 18 14 4 6 5 4 1 2 6 3 16 14 21 23 9 155 7.5-12.5 1 10 5 6 0 0 1 5 11 24 11 3 15 8 1 0 101 12.5-18.5 0 0 1 0 0 0 0 2 1 0 0 0 0 0 0 0 4 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 13 29 27 16 8 5 5 8 14 30 16 19 32 31 24 11 288 Cl ass C Freq: O.044 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 2 6 8 10 6 2 0 1 0 1 1 1 2 2 1 5 48 3.5-7.5 5 25 16 9 17 7 11 3 7 26 15 19 25 19 11 10 225 7.5-12.5 0 17 3 4 1 0 1 5 22 16 4 2 17 6 2 4 104 12.5-18.5 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 7 49 27 23 24 9 12 9 30 43 20 22 44 27 14 19 379 Class D Freq* 0 481 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 3 0.95-3.5 67 77 99 71 47 24 26 27 40 35 38 60 38 44 51 52 796 3.5-7.5 42 156 92 57 70 120 104 96 225 377 210 297 267 212 132 51 2508 7.5-12.5 24 84 34 14 12 13 44 49 99 202 36 20 60 44 18 11 764 12.5-18.5 6 19 3 2 0 0 2 1 21 6 0 0 0 0 0 0 60 18.5-24 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 139 338 228 144 129 157 177 173 385 620 284 378 366 300 201 114 4133 Page 57

Table A-1 (continued)

Jan-Dec 2018 Cl ass E Freo : 0295 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 1 0 0 0 0 3 1 2 0 0 7 0.95-3.5 41 61 44 53 70 29 41 45 57 42 76 101 114 66 49 52 941 3.5-7.5 7 38 19 16 24 26 74 84 163 260 292 123 91 22 14 14 1267 7.5-12.5 0 7 4 0 2 1 10 30 54 142 40 3 5 1 0 0 299 12.5-18.5 0 9 1 0 0 0 1 8 0 1 0 0 0 0 0 0 20 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 48 115 68 69 96 56 127 167 274 445 408 230 211 91 63 66 2534 Class F Freq: 0.071 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 3 0.95-3.5 5 7 27 53 22 8 4 13 13 26 49 69 36 21 8 21 382 3.5-7.5 0 0 1 7 4 0 3 1 10 36 112 13 1 4 4 1 197 7.5-12.5 0 0 0 0 0 0 0 0 0 9 23 0 0 0 0 0 32 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 5 7 28 60 26 8 7 14 23 71 184 84 37 25 13 22 614 Class G Freq: 0.012 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 3 3 3 10 6 0 1 1 1 4 9 16 1 0 2 0 60 3.5-7.5 0 0 0 0 0 0 0 0 0 1 22 2 0 0 0 0 25 7.5-12.5 0 0 0 0 0 0 0 0 0 5 16 0 0 0 0 0 21 12.5-18.5 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 3 3 3 10 6 0 1 1 1 11 47 18 1 0 2 0 107 Class All Freq* 1 000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 2 0 0 0 0 6 2 2 1 0 13 0.95-3.5 131 158 196 211 161 63 72 87 111 108 175 248 196 136 112 140 2305 3.5-7.5 91 296 186 130 143 174 201 189 413 711 656 479 418 322 212 95 4716 7.5-12.5 25 144 51 25 15 14 61 89 197 420 138 39 133 78 23 15 1467 12.5-18.5 6 29 5 2 0 0 3 11 23 9 0 0 0 0 0 0 88 18.5-24 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 253 629 438 368 319 251 339 376 744 1248 969 772 749 538 348 250 8591 Page 58

Table A-2 Joint Frequency Distribution of Wind Directions and Speeds For the 220-ft level of the 220-ft Tower Jan-Mar 2018 Class A Freq* 0 121 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 3 2 4 4 1 1 1 0 0 0 0 0 0 1 2 2 21 7.5-12.5 4 4 3 4 8 1 0 3 1 3 2 0 0 3 2 2 40 12.5-18.5 13 4 2 2 1 2 0 0 0 4 3 2 5 9 8 8 63 18.5-24 7 11 0 0 0 0 0 0 0 1 5 1 8 13 15 2 63

>24 5 12 0 0 0 0 0 0 0 0 2 0 12 12 10 3 56 TOTAL 32 33 9 10 10 4 1 3 1 8 12 3 25 38 37 17 243 Class B Freq: 0.069 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 1 0 2 0 3 0 0 0 0 0 0 0 0 0 0 0 6 7.5-12.5 0 0 0 1 0 0 0 0 1 0 3 1 2 0 2 0 10 12.5-18.5 2 2 4 0 0 0 0 1 3 12 1 1 7 7 6 6 52 18.5-24 2 2 1 1 1 0 0 1 2 1 2 2 7 5 9 7 43

>24 5 4 1 0 0 0 0 0 0 1 1 0 3 10 3 0 28 TOTAL 10 8 8 2 4 0 0 2 6 14 7 4 19 22 20 13 139 Cl ass C F req: 0 077 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 4 2 0 0 1 0 0 0 0 1 0 2 0 0 10 7.5-12.5 1 2 1 1 0 1 0 0 1 3 3 3 4 2 1 0 23 12.5-18.5 0 10 0 1 0 1 1 1 5 8 4 0 12 4 3 1 51 18.5-24 1 1 1 0 1 1 0 1 2 3 3 1 4 5 2 5 31

>24 3 9 2 2 1 0 0 0 1 1 0 0 6 8 4 4 41 TOTAL 5 22 8 6 2 3 2 2 9 15 10 5 26 21 10 10 156 Cl ass D F req: 0 549 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 0 1 0 1 1 0 0 0 0 0 0 0 1 1 0 6 3.5-7.5 1 7 4 5 1 3 1 4 4 3 2 4 4 2 6 2 53 7.5-12.5 6 5 21 12 5 5 10 13 16 26 34 23 13 18 7 6 220 12.5-18.5 1 9 28 8 2 2 8 7 21 74 51 58 62 29 28 11 399 18.5-24 2 12 14 11 2 5 0 0 8 32 42 9 28 29 34 12 240

>24 49 39 5 13 0 0 0 0 14 11 3 0 7 10 26 11 188 TOTAL 60 72 73 49 11 16 19 24 63 146 132 94 114 89 102 42 1106 Page 59

Table A-2 (continued)

Jan-Mar 2018 Class E F reo: 0.163 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 2 1 2 1 0 0 0 2 0 0 1 0 0 0 0 9 3.5-7.5 4 6 3 1 2 4 0 2 3 4 3 3 2 6 2 2 47 7.5-12.5 6 3 5 1 0 1 2 4 7 8 7 10 7 14 7 3 85 12.5-18.5 5 6 11 0 0 0 1 1 14 11 1 13 11 15 7 4 100 18.5-24 3 4 2 0 0 0 0 1 1 4 17 3 2 7 3 5 52

>24 1 12 3 0 0 0 0 0 0 10 2 0 0 4 2 2 36 TOTAL 19 33 25 4 3 5 3 8 27 37 30 30 22 46 21 16 329 Class F F reo: 0 .019 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 4 3.5-7.5 0 0 0 0 1 1 1 0 0 0 2 1 1 1 0 1 9 7.5-12.5 0 0 0 0 0 0 1 1 2 0 1 2 0 1 2 0 10 12.5- 18.5 0 0 0 0 0 0 0 1 1 0 1 0 1 2 1 0 7 18.5-24 0 0 0 0 0 0 0 0 0 0 4 2 0 0 0 0 6

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 3 TOTAL 1 0 0 0 1 1 2 2 3 0 8 5 3 5 3 5 39 Class G Freq* 0 001 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7. 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7.5-12.5 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 2 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 3 Class All Freq: 1 000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 2 2 2 2 2 1 0 0 2 0 0 1 1 2 1 1 19 3.5-7.5 9 15 17 12 8 9 4 6 7 7 7 9 7 12 10 7 146 7.5-12.5 17 14 30 19 13 8 13 22 28 40 50 40 26 38 21 11 390 12.5-18.5 21 31 45 11 3 5 10 11 44 109 61 74 98 67 53 30 673 18.5-24 15 30 18 12 4 6 0 3 13 41 73 18 49 59 63 31 435

>24 63 76 11 15 1 0 0 0 15 23 8 0 28 44 45 23 352 TOTAL 127 168 123 71 31 29 27 42 109 220 199 142 209 222 193 103 2015 Page 60

Table A-2 (continued)

Apr-Jun 2018 Cl ass A Frea: 0 .111 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 2 5 13 4 2 0 0 0 1 0 0 0 0 0 0 2 29 7.5-12.5 5 8 4 3 21 18 4 0 3 0 1 2 3 9 2 5 88 12.5-18.5 4 5 10 6 2 3 5 1 1 12 4 5 8 7 4 1 78 18.5-24 6 3 2 2 0 0 0 0 1 3 1 0 6 3 5 2 34

>24 3 1 3 2 1 0 0 0 0 0 0 0 2 0 0 0 12 TOTAL 20 22 32 17 26 21 9 1 6 15 6 7 19 19 11 10 241 Class B Freq: 0.043 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 2 2 2 1 1 1 0 0 0 0 0 0 0 1 0 1 11 7.5-12.5 3 0 2 1 2 2 3 0 2 4 5 3 4 1 1 0 33 12.5-18.5 0 1 0 1 1 0 1 2 2 3 6 11 0 1 0 0 29 18.5-24 0 0 1 0 1 0 0 0 0 0 1 0 0 1 0 1 5

>24 1 0 3 6 3 0 0 0 0 1 0 0 1 0 0 0 15 TOTAL 6 3 8 9 8 3 4 2 4 8 12 14 5 4 1 2 93 Class C Freq: 0.062 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 3 3 2 5 1 3 1 1 1 1 1 0 0 1 0 2 25 7.5-12.5 0 1 2 0 4 3 7 3 2 7 5 8 3 1 0 2 48 12.5-18.5 0 0 4 3 3 5 1 1 7 6 3 3 1 1 0 2 40 18.5-24 0 1 5 2 4 0 0 0 0 2 1 0 0 1 0 0 16

>24 0 0 1 3 1 0 0 0 0 0 0 0 1 0 0 0 6 TOTAL 3 5 14 13 13 11 9 5 10 16 10 11 5 4 0 6 135 Class D Freq: 0.404 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 6 2 2 0 1 2 1 5 1 4 0 0 0 1 0 0 25 3.5-7.5 6 9 19 11 8 12 9 7 7 14 10 2 2 2 4 8 130 7.5-12.5 13 12 9 15 12 24 15 6 19 38 19 10 7 4 9 13 225 12.5-18.5 5 10 0 7 13 16 11 18 32 84 28 22 26 8 9 12 301 18.5-24 9 3 7 6 6 5 5 4 1 46 39 2 7 17 5 5 167

>24 1 0 1 2 7 3 2 0 0 6 2 0 5 2 0 0 31 TOTAL 40 36 38 41 47 62 43 40 60 192 98 36 47 34 27 38 879 Page 61

Table A-2 (continued)

Apr-Jun 2018 Class E Freq: 0.280 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtf,N NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 1 1 0 5 2 4 2 3 3 2 0 1 1 0 3 28 3.5-7.5 2 7 8 9 5 12 7 2 5 7 4 4 1 4 7 7 91 7.5-12.5 4 3 2 5 7 15 12 10 17 27 10 10 10 7 10 9 158 12.5-18.5 3 1 1 2 2 1 4 12 10 58 39 12 20 12 7 9 193 18.5-24 2 0 1 0 1 0 0 0 0 40 48 4 2 8 2 2 110

>24 0 0 0 0 0 0 2 0 0 14 6 0 2 3 3 0 30 TOTAL 11 12 13 16 20 30 29 26 35 149 109 30 36 35 29 30 610 Class F Freq: 0.078 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtf,N NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 1 2 0 0 0 3 1 0 1 0 0 0 0 1 9 3.5-7.5 8 2 4 3 2 2 1 2 3 4 1 0 4 0 5 3 44 7.5-12.5 2 1 0 0 0 3 1 1 0 4 3 1 3 3 1 8 31 12.5-18.5 1 0 0 0 0 0 0 4 0 3 9 9 9 3 5 8 51 18.5-24 2 0 0 0 0 0 0 1 0 5 11 1 1 1 3 6 31

>24 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 3 TOTAL 13 3 5 5 2 5 2 11 4 16 28 11 17 7 14 26 169 Class G Freq* 0 023 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtf,N NW NNW TOTAL Calm-0.95 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0.95-3.5 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 4 3.5-7.5 1 0 0 0 0 0 0 0 1 0 0 1 1 1 0 0 5 7.5-12.5 0 0 0 0 0 0 0 0 0 1 1 1 4 1 1 0 9 12.5- 18.5 1 0 0 0 0 0 0 0 0 1 6 10 2 1 0 0 21 18.5-24 0 0 0 0 0 0 0 0 0 2 1 3 0 0 0 0 6

>24 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 3 TOTAL 3 1 1 0 0 0 0 0 3 7 9 15 7 3 1 0 50 Class All Freq* 1 000 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w Wtf,N NW NNW TOTAL Calm-0.95 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0.95-3.5 7 4 4 2 6 4 5 10 6 8 3 0 1 2 0 4 66 3.5-7.5 24 28 48 33 19 30 18 12 18 26 16 7 8 9 16 23 335 7.5-12.5 27 25 19 24 46 65 42 20 43 81 44 35 34 26 24 37 592 12.5-18.5 14 17 15 19 21 25 22 38 52 167 95 72 66 33 25 32 713 18.5-24 19 7 16 10 12 5 5 5 2 98 102 10 16 31 15 16 369

>24 5 1 8 13 12 3 4 0 0 23 12 0 11 5 3 0 100 TOTAL 96 82 111 101 116 132 96 85 122 403 272 124 136 106 83 112 2177 Page 62

Table A-2 (continued)

Jul-Sep 2018 Class A Frea: 0.011 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 7.5-12.5 0 0 2 2 0 1 0 1 0 0 0 1 0 0 0 1 8 12.5-18.5 0 1 7 1 0 0 0 0 1 0 0 0 0 0 0 1 11 18.5-24 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1

>24 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TOTAL 1 1 10 3 1 1 0 1 2 0 0 1 0 0 0 2 23 ClassB Freq* 0013 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 2 7.5-12.5 0 0 1 2 0 1 0 0 1 0 0 0 0 0 1 0 6 12.5-18.5 0 3 5 1 0 1 0 1 1 0 0 0 0 0 0 0 12 18.5-24 0 3 4 0 0 0 0 0 0 0 0 0 0 0 0 0 7

>24 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TOTAL 0 6 12 3 1 2 0 1 2 0 0 0 0 0 1 0 28 Cl ass C Frea: 0 011 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 3 7.5-12.5 0 0 2 1 0 1 0 0 0 2 1 0 0 0 0 0 7 12.5-18.5 0 0 2 1 0 0 0 0 1 1 0 0 0 0 0 0 5 18.5-24 0 4 2 1 0 0 0 0 0 0 0 0 0 0 0 1 8

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 4 6 4 0 1 0 0 1 4 1 0 0 1 0 1 23 Cl ass D F rea: 0 358 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 2 3.5-7.5 2 3 15 6 3 3 3 1 4 6 3 1 0 0 1 0 51 7.5-12.5 5 9 40 25 15 10 17 13 15 43 23 2 1 3 3 8 232 12.5-18.5 8 20 44 9 10 13 9 24 20 121 54 1 1 1 1 2 338 18.5-24 3 25 6 11 5 13 5 3 1 21 18 0 0 0 0 2 113

>24 0 0 2 2 12 0 0 0 0 6 0 0 0 0 0 0 22 TOTAL 18 57 108 53 46 39 34 41 40 197 98 4 2 4 5 12 758 Page 63

Table A-2 (continued)

Jul-Sep 2018 Cl ass E Freo: O435 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 2 0.95-3.5 4 2 7 2 1 3 2 0 2 2 1 0 1 1 2 2 32 3.5-7.5 15 12 10 17 20 10 5 15 5 8 5 6 10 7 7 7 159 7.5-12.5 9 10 5 14 15 48 28 19 33 53 44 18 13 18 16 11 354 12.5-18.5 9 13 4 2 3 0 7 15 35 97 53 27 18 6 8 7 304 18.5-24 3 3 0 0 0 0 0 3 1 19 26 2 0 1 1 5 64

>24 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 3 6 TOTAL 41 40 26 35 39 62 42 52 76 179 130 53 42 34 34 36 921 ClassF Freq: 0.148 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.95-3.5 2 5 8 4 6 1 1 1 2 4 2 2 1 1 1 0 41 3.5-7.5 6 7 3 13 11 17 8 5 6 7 3 5 8 4 2 3 108 7.5-12.5 6 2 3 0 5 4 6 6 7 1 4 7 11 5 10 3 80 12.5-18.5 1 1 0 0 0 0 0 1 1 4 14 16 15 5 3 1 62 18.5-24 1 0 0 0 0 0 0 0 0 1 15 2 0 0 0 0 19

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 3 TOTAL 16 15 15 17 22 22 15 13 16 17 38 32 35 15 16 10 314 C lass G Freo: 0 023 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 2 0 5 3 2 0 3 0 0 1 0 0 0 0 2 0 18 3.5-7.5 0 3 3 0 0 0 3 1 1 0 0 2 1 0 1 0 15 7.5-12.5 0 0 0 0 0 1 0 1 1 0 2 1 1 3 0 0 10 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 2 1 3 0 0 6 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 2 3 8 3 2 1 6 2 2 1 2 5 3 6 3 0 49 Cl ass All Freo: 1 000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 1 3 0.95-3.5 8 7 21 9 10 4 6 1 4 7 3 2 2 2 5 2 93 3.5-7.5 24 25 34 37 34 30 19 22 16 22 11 14 19 12 11 10 340 7.5-12. 5 20 21 53 44 35 66 51 40 57 99 74 29 26 29 30 23 697 12.5- 18.5 18 38 62 14 13 14 16 41 59 223 121 46 35 15 12 11 738 18.5-24 7 35 12 12 5 13 5 6 3 41 59 4 0 1 1 8 212

>24 1 0 2 2 14 0 0 0 0 6 1 0 0 1 0 6 33 TOTAL 78 126 185 118 111 128 97 110 139 398 269 95 82 60 59 61 2116 Page 64

Table A-2 (continued)

Oct-Dec 2018 Class A Freq: 0.014 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7.5-12.5 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 12.5-18.5 2 1 0 0 0 0 0 0 1 0 1 2 0 2 3 0 12 18.5-24 0 1 0 0 0 0 0 0 0 1 2 0 1 0 0 1 6

>24 0 0 0 1 0 0 0 0 0 0 0 0 2 2 4 1 10 TOTAL 2 2 0 1 0 0 0 0 1 1 3 2 3 5 7 2 29 Cl ass B F req: 0 012 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7.5-12.5 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 12.5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 2 3 1 6 18.5-24 0 1 0 0 1 0 0 0 0 3 3 0 0 0 4 0 12

>24 0 0 0 0 1 0 0 0 0 1 0 0 0 2 2 0 6 TOTAL 0 1 0 0 2 0 0 0 0 4 3 0 1 4 9 1 25 Cl ass C F req: 0 022 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7.5-12.5 0 0 0 0 0 0 0 0 0 0 1 0 0 1 3 0 5 12.5-18.5 0 0 0 1 0 0 0 0 0 0 2 2 1 3 1 0 10 18.5-24 0 1 0 0 2 0 0 0 0 4 0 0 0 3 1 3 14

>24 0 0 0 0 1 0 0 0 0 0 0 0 0 5 6 5 17 TOTAL 0 1 0 1 3 0 0 0 0 4 3 2 1 12 11 8 46 Cl ass D F req: 0 606 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3.5-7.5 4 6 4 7 6 2 1 2 2 2 1 5 3 6 5 3 59 7.5-12.5 14 7 11 6 7 4 7 4 9 27 48 28 29 22 12 11 246 12.5-18.5 8 9 19 7 15 10 11 10 8 37 94 48 87 87 66 22 538 18.5-24 7 11 14 12 14 8 8 8 2 17 10 2 31 48 53 24 269

>24 12 9 2 13 18 2 3 1 0 0 0 0 5 41 44 12 162 TOTAL 46 42 50 45 60 26 30 25 21 83 153 83 155 204 180 72 1275 Page 65

Table A-2 (conti nued)

Oct-Dec 2018 Cl ass E Freo : 0306 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 2 0 1 1 0 0 1 0 0 0 0 0 0 0 1 2 8 3.5-7.5 6 6 6 2 3 2 8 2 11 6 3 8 10 9 5 6 93 7.5-12 .5 5 2 10 3 6 3 14 22 17 13 32 38 35 32 15 6 253 12.5-18.5 3 0 5 2 3 3 13 19 12 29 35 24 34 17 5 1 205 18.5-24 1 0 2 2 6 2 3 5 5 5 13 2 3 8 2 2 61

>24 2 0 0 2 8 0 0 8 1 0 0 0 0 1 1 1 24 TOTAL 19 8 24 12 26 10 39 56 46 53 83 72 82 67 29 18 644 Cl ass F Freo: 0 039 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 3 0 0 0 0 0 1 0 0 0 0 0 0 0 4 3.5-7.5 3 0 0 0 0 0 1 0 0 2 0 2 1 2 0 0 11 7.5-12 .5 0 0 1 0 0 0 0 1 1 5 4 4 8 10 1 0 35 12.5-18.5 0 0 0 0 0 0 0 0 1 0 11 8 6 1 0 0 27 18.5-24 0 0 0 0 0 1 2 0 0 0 1 0 0 0 0 0 4

>24 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 TOTAL 3 0 4 0 0 1 3 1 3 7 17 14 15 13 1 0 82 Class G F reo: 0 002 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0 .95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 2 7.5-12.5 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 2 12 5-18.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18.5-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

>24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 4 Cl ass All F reo: 1 000 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 3 0 4 1 0 0 1 0 1 0 0 0 0 0 1 2 13 3.5-7.5 13 12 10 9 9 4 10 4 13 11 5 15 14 17 10 9 165 7.5- 12.5 19 9 22 9 13 7 21 27 27 45 85 71 74 66 31 17 543 12.5-18.5 13 10 24 10 18 13 24 29 22 66 143 84 128 112 78 24 798 18.5-24 8 14 16 14 23 11 13 13 7 30 29 4 35 59 60 30 366

>24 14 9 2 16 28 2 3 9 1 1 1 0 7 51 57 19 220 TOTAL 70 54 78 59 91 37 72 82 71 153 263 174 258 305 237 101 2105 Page 66

Table A-2 (continued)

Jan-Dec 2018 Class A Freq: 0.064 moh N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 6 7 18 8 3 1 1 0 1 0 0 0 0 1 2 4 52 7.5-12.5 9 12 9 9 29 20 4 4 4 3 3 3 3 13 4 8 137 12.5-18.5 19 11 19 9 3 5 5 1 3 16 8 9 13 18 15 10 164 18.5-24 13 15 2 2 0 0 0 0 2 5 8 1 15 16 20 5 104

>24 8 13 3 3 2 0 0 0 0 0 2 0 16 14 14 4 79 TOTAL 55 58 51 31 37 26 10 5 10 24 21 13 47 62 55 31 536 Cl ass B Freq: O034 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 3 2 6 1 4 1 0 0 0 0 0 0 0 1 0 1 19 7.5-12.5 3 0 3 4 2 3 3 0 4 4 8 4 7 1 4 0 50 12.5-18.5 2 6 9 2 1 1 1 4 6 15 7 12 7 10 9 7 99 18.5-24 2 6 6 1 3 0 0 1 2 4 6 2 7 6 13 8 67

>24 6 4 4 6 5 0 0 0 0 3 1 0 4 12 5 0 50 TOTAL 16 18 28 14 15 5 4 5 12 26 22 18 25 30 31 16 285 Class C Freq: 0.043 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.5-7.5 3 3 6 8 1 3 2 1 1 2 1 1 0 4 0 2 38 7.5-12.5 1 3 5 2 4 5 7 3 3 12 10 11 7 4 4 2 83 12.5-18.5 0 10 6 6 3 6 2 2 13 15 9 5 14 8 4 3 106 18.5-24 1 7 8 3 7 1 0 1 2 9 4 1 4 9 3 9 69

>24 3 9 3 5 3 0 0 0 1 1 0 0 7 13 10 9 64 TOTAL 8 32 28 24 18 15 11 7 20 39 24 18 32 38 21 25 360 Class D Freq: 0.478 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.95-3.5 8 2 4 0 3 3 1 5 1 4 0 0 0 2 1 0 34 3.5-7.5 13 25 42 29 18 20 14 14 17 25 16 12 9 10 16 13 293 7.5-12.5 38 33 81 58 39 43 49 36 59 134 124 63 50 47 31 38 923 12.5-18.5 22 48 91 31 40 41 39 59 81 316 227 129 176 125 104 47 1576 18.5-24 21 51 41 40 27 31 18 15 12 116 109 13 66 94 92 43 789

>24 62 48 10 30 37 5 5 1 14 23 5 0 17 53 70 23 403 TOTAL 164 207 269 188 164 143 126 130 184 618 481 217 318 331 314 164 4018 Page 67

Table A-2 (continued)

Jan-Dec 2018 Class E Freq: 0.298 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 2 0.95-3.5 6 5 10 5 7 5 7 2 7 5 3 1 2 2 3 7 77 3.5-7.5 27 31 27 29 30 28 20 21 24 25 15 21 23 26 21 22 390 7.5-12.5 24 18 22 23 28 67 56 55 74 101 93 76 65 71 48 29 850 12.5-18.5 20 20 21 6 8 4 25 47 71 195 128 76 83 50 27 21 802 18.5-24 9 7 5 2 7 2 3 9 7 68 104 11 7 24 8 14 287

>24 4 12 3 2 8 0 2 8 1 24 9 0 2 9 6 6 96 TOTAL 90 93 88 67 88 107 113 142 184 418 352 185 182 182 113 100 2504 Class F Freo: O.O72 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.95-3.5 3 5 12 6 6 1 1 4 4 4 3 2 2 2 1 2 58 3.5-7.5 17 9 7 16 14 20 11 7 9 13 6 8 14 7 7 7 172 7.5-12.5 8 3 4 0 5 7 8 9 10 10 12 14 22 19 14 11 156 12.5-18.5 2 1 0 0 0 0 0 6 3 7 35 33 31 11 9 9 147 18.5-24 3 0 0 0 0 1 2 1 0 6 31 5 1 1 3 6 60

>24 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 6 10 TOTAL 33 18 24 22 25 29 22 27 26 40 91 62 70 40 34 41 604 C lass G Freq: 0 013 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0.95-3.5 3 1 5 3 2 0 3 0 1 2 0 0 0 0 2 0 22 3.5-7.5 1 3 3 0 0 0 3 1 2 1 1 3 2 1 1 0 22 7.5-12.5 0 0 0 0 0 1 0 2 1 1 3 4 6 4 1 0 23 12.5-18.5 1 0 0 0 0 0 0 0 0 1 6 12 3 5 0 0 28 18.5-24 0 0 0 0 0 0 0 0 0 2 1 3 0 0 0 0 6

>24 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 3 TOTAL 5 4 9 3 2 1 6 3 5 9 12 22 11 10 4 0 106 Class All Freq: 1.000 mph N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW TOTAL Calm-0.95 0 0 2 0 0 1 0 0 1 0 0 0 0 0 0 1 5 0.95-3.5 20 13 31 14 18 9 12 11 13 15 6 3 4 6 7 9 191 3.5-7.5 70 80 109 91 70 73 51 44 54 66 39 45 48 50 47 49 986 7.5-12.5 83 69 124 96 107 146 127 109 155 265 253 175 160 159 106 88 2222 12.5-18.5 66 96 146 54 55 57 72 119 177 565 420 276 327 227 168 97 2922 18.5-24 49 86 62 48 44 35 23 27 25 210 263 36 100 150 139 85 1382

>24 83 86 23 46 55 5 7 9 16 53 22 0 46 101 105 48 705 TOTAL 371 430 497 349 349 326 292 319 441 1174 1003 535 685 693 572 377 8413 Page 68

APPENDIX B Results of Onsite Groundwater Monitoring Program In response to the Nuclear Energy Institute (NEI) Groundwater Protection Initiative, Pilgrim Station instituted a groundwater monitoring program during 2007. Four monitoring wells were installed inside the protected area fence during the fourth quarter of 2007. The first samples were collected in November 2007. Since these are onsite wells, they are not considered part of the Radiological Environmental Monitoring Program (REMP), and data from these wells are being reported in the annual Radiological Effluent Release Report. Two pre-existing wells were incorporated into the groundwater monitoring program in early 2008. Additional wells were added to the program in 201 O (12 wells), 2011 (2 wells), 2012 (1 well), 2013 (3 wells), and 2014 (1 well). A total of 23 wells are being sampled on a routine basis.

In addition to sampling the onsite monitoring wells, samples of surface water are collected from a location in the PNPS Intake Canal. These locations are along the shoreline in the same direction as the groundwater flow gradient.

All samples collected are analyzed for tritium, a radioactive isotope of hydrogen, and also for gamma emitting radionuclides. In accordance with industry practice established under the NEI initiative, lower limits of detection (LLDs) used for analysis of REMP samples were used when assessing these samples for the presence of radioactivity. Low levels of tritium were detected in many of the onsite wells. Although gamma spectroscopy indicated the presence of naturally-occurring radioactivity, such as Potassium-40 and radon daughters from the uranium/thorium decay chains, there was no indication of any plant-related radioactivity in the groundwater samples, other than tritium. Such levels of natural radioactivity are expected as these radionuclides are dissolved into the groundwater from the rocks and soil. The fact that these low levels of naturally-occurring radioactivity can be detected demonstrates the ability of the gamma spectroscopy analyses to detect radioactivity in groundwater. Analyses are also performed for hard-to-detect radionuclides, including lron-55, Nickel-63, Strontium-89, and Strontium-90 on a less frequent basis. These hard-to-detect radionuclides were also non-detectable in all of the wells sampled and analyzed during 2018.

A summary of the results of the tritium analyses conducted in 2018 are presented in the following table. In this table, a value of "NOA < xx" in the columns indicates that no activity was detected in the sample when analyzed to the minimum-detectable level following the "<" sign. For example, the sample collected from MW201 on 28-Mar-2018 contained no detectable tritium, and a minimum detectable concentration of 295 pCi/L was achieved on that sample. The achieved sensitivity of 295 pCi/L is well below the required REMP LLD of 3000 pCi/L, and no tritium was detected even when counted to this more sensitive level of detection. No plant-related radioactivity (other than tritium) was detected in any of the monitoring wells, and no tritium or plant-related radioactivity was detected in surface water samples collected from the intake canal.

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Number of Minimum Maximum Installation Number of Monitoring Well ID Positive Concentration Concentration Date Samples Results pC i/L pCi/L MW201 Nov-2007 4 0 NOA< 295 NDA<325 MW202 Nov-2007 4 1 NDA<303 314 MW202-I Apr-2010 4 3 NOA< 290 879 MW203 Nov-2007 Well decommissioned in 2013 during construction of ISFSI pad MW204 Nov-2007 4 3 NDA<326 470 MW205 Apr-2010 4 0 NDA<292 NDA<337 MW206 Apr-2010 18 4 NOA< 290 1570 MW207 Apr-2010 4 2 NOA< 317 410 MW208-S Apr-2010 4 0 NOA< 290 NOA< 327 MW208-I Apr-2010 4 0 NOA< 288 NOA< 325 MW209 Aug-2010 4 2 NDA<300 631 MW210 Aug-2010 4 1 NDA<302 478 MW211 Aug-2010 24 24 1140 4020 MW2 12 Aug-2010 4 3 NDA<326 790 MW213 Aug-2010 4 1 NDA<299 431 MW2 14 Aug-2010 4 0 NDA<294 NDA<327 MW215 Dec-2011 18 14 NDA<287 3350 MW216 Sep-2012 18 18 575 3000 MW217 Dec-2011 4 3 NDA<312 791 MW218 Nov-2013 18 18 1080 2200 MW219 Dec-2013 47 47 747 40500 MW220 Dec-2014 7 4 NDA<276 1130 MW3 Jul-1987 4 0 NDA<300 NDA<332 MW4 Jul-1997 Well decommissioned in 2013 during installation of MW4R MW4-R Nov-2013 4 0 NDA<295 NDA<328 All Wells -- 214 148 NOA < 276 40500 Intake Canal West -- 49 0 NOA< 270 NOA< 337 Intake Canal East -- Discontinued sampli ng in 2016 for sampling safety concerns Concentrations of tritium detected in the onsite wells ranged from non-detectable at less than 276 pCi/L , up to a maximum concentration of 40,500 pCi/L. The average quarterly concentrations from these onsite wells are well below the voluntary communication reporting level of 20,000 pCi/L as established by the EPA Drinking Water Standard. MW219 was the outlier in 2018 due to a leak found within the Feedwater system that was located above an expansion joint leading to the ground onsite. This leak was mitigated and there was no increase seen in downstream shoreline wells. By the end of 2018 the levels in MW219 had returned to normal. Although the EPA Standard provides a baseline for comparison, no drinking water sources are affected by th is tritium . All of the affected wells are onsite, and the general groundwater flow pathway is under Pilgrim Station and out into the salt water of Cape Cod Bay. As such, there is no potential to influence any off-site drinking water wells. Even if worst-case assumptions were made and the water from monitoring well MW219 (average concentration = 11,414 pCi/L) was consumed as drinking water for an entire year, the maximum dose consequence would be less than 0.86 mrem/yr. In actuality, any dose consequence would be much less than this, as any tritium-laden water potentially leaving the site would be diluted into the seawater of Cape Cod Bay before being incorporated into any ingestion pathways. No drinking water ingestion pathway exists at the Pilgrim Station site.

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Although there are no indications that the groundwater containing detectable tritium is actually migrating offsite, a bounding calculation was performed to assess the potential dose impact of such a scenario. Based on the tritium concentrations detected during 2018, the annual average concentrations of tritium in groundwater in the four monitoring wells most closely adjacent to the shoreline (MW204, MW205, MW202, and MW201) were used to estimate potential tritium migration into the intake bay. Hydrological characteristics of the compacted backfill in the vicinity of these wells were measured in 2010 and indicate the hydraulic conductivity ranges from 0.002 cm/sec to approximately 0.006 cm/sec. When coupled with the hydraulic slope of 0.014 and average porosity of 0.3, the flow velocity was calculated as being between 0.08 and 0.23 meters per day. Using an assumed horizontal shoreline interface area 236 meters long by 3 meters deep that could potentially transmit groundwater into the intake bay, the annual discharge of groundwater would be approximately 12.5 million Liters of water per year. Assuming this volume of 12.5 million liters contained the segment-weighted average concentration of 468 pCi/L, the annual discharge of tritium into the intake bay under this hypothetical scenario would be 0.00585 Curies. This activity represents less than 0.0004% of the annual airborne effluent of tritium released from the reactor building vent (see Table 2.2-C). Such airborne effluents can be washed down to the ground surface during precipitation events and infiltrate into the ground, thereby introducing tritium into the groundwater.

In the hypothetical scenario described above, the 0.00585 Curies of tritium entering the intake bay would be further diluted into the circulating water flow of the plant. As documented in Table 2.3-A, the total volume of circulating water flow during 2018 was 524 billion Liters, yielding an effective concentration of tritium in the intake bay of approximately 0.0091 pCi/L. Such a concentration would be well below the detection sensitivity of approximately 450 pCi/L used to analyze water collected from the discharge canal as part of the radiological environmental monitoring program (REMP). The calculated dose to the maximum-exposed member of the public from such a hypothetical release would be 0.0000000052 millirem, resulting from ingestion of tritium incorporated into fish and shellfish. Since the tritium would be incorporated into seawater, there is no drinking water ingestion pathway in the described scenario.

The following table lists the hydrological characteristics in the vicinity of each of the monitoring wells used to estimate tritium migration. Predicted flow velocities, annual discharge volumes, average tritium concentrations, and hypothetical tritium discharges are listed for each shoreline segment represented by each monitoring well.

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Shoreline Segment Number 1 2 3 4 Monitorinq Well Number MW204 MW205 MW202 MW201 Hydraulic Conductivity - cm/sec 1.99E-03 4.27E-03 3.13E-03 5.64E-03 Hydraulic Slope 0.014 0.014 0.014 0.014 Porosity 0.300 0.300 0.300 0.300 Flow Velocity - m/day 8.02E-02 1.72E-01 1.26E-01 2.27E-01 Flow Velocity - ft/yr 9.61E+01 2.06E+02 1.51E+02 2.72E+02 Length of Shoreli ne Segment - m 61 .0 38.1 45.7 91.4

!Thickness of Water Layer - m 3.0 3.0 3.0 3.0

~olumetric Discharge - m3/day 4.40E+OO 5.90E+OO 5.19E+OO 1.87E+01

~olumetric Discharge - Liter/yr 1.61E+06 2.16E+06 1.90E+06 6.84E+06

~nnual Average H-3 Concentration - pCi/L 3.11E+02 3.16E+02 7.68E+02 3.11E+02

~nnual Segment Tritium Discharge - Ci/yr 5.00E-04 6.81 E-04 1.46E-03 2.13E-03

!Total Volumetric Discharqe - L/yr 1.25E+07 rrotal H-3 Discharqe - Ci/yr 4.76E-03

~nnual Circulating Water Flow - Liter/yr 5.24E+11 Discharge Canal H-3 Concentration - Ci/L 9.09E-15 Discharge Canal H-3 Concentration - pCi/L 9.09E-03 Max. lndiv. Dose Factor - mrem/yr per Ci/L 5.73E+05 Maximum Individual Dose - mrem/yr 5.21E-09 In conclusion, the only radionuclide detected in groundwater during the 2018 monitoring effort that is attributable to Pilgrim Station operations is tritium . Although some soil samples near the separation in the underground discharge line from the neutralizing sump indicated the presence of low-level gamma radioactivity , such activity has not been detected in the groundwater and indicates the radioactivity is immobile and confined to the soil. Even in the case of the three reportable events that occurred in 2013 and subsequent sample resu lts in 2016, the total dose impact to a maximally-exposed member of the public would have been much less than 1 mrem/yr.

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APPENDIX C CORRECTIONS TO PREVIOUS EFFLUENT REPORTS There were no corrections made to previous effluent reports during calendar-year 2018. Corrections found through the process of creating this report are as follows:

-One typo found in the 2017 Annual Radiological Effluent Release Report (ARERR): Table 2.3-A section A. "Fission and Activation Products" reported the annual percent of effluent concentration limit to be 3.14E-0% instead of the indented result of 3.14E-07%. Table 6.2 "Percent of ODCM Effluent Control Limits" section A. "Fission and Activation Product Effluent Concentration Limit" accurately reported the fraction of the limit as 3.14E-07%.

- One issue found in the 2017 Annual Radiological Effluent Release Report (ARERR): Table 6.1 section C "Instantaneous Dose Rate Limit - Particulates, Iodines, & Tritium, PNPS ODCM Control 3.3.1.b, Limit: 1500 mrem/yr Organ Dose" reported the Fraction of the Limit as 4. 76E-03%. This value actually represents the fraction of the limit and not the fraction of the limit as a percent, which should be reported as 4.76E-01 %. Looking at previous reports, this error was reported as such since the 2008 ARERR.

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APPENDIX D CHANGES TO PNPS OFFSITE DOSE CALCULATION MANUAL No revision was made to the PNPS Offsite Dose Calculation Manual (ODCM) during calendar year 2018. A signature cover page was added to ODCM revision 11 on 9-May-2018 to include the site GMPO signature. This addition was not considered a revision of the ODCM.

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