Text

Submittal of Annual Radiological Environmental Operating Report - 2022
	ML23117A325
Person / Time
Site:	Waterford
Issue date:	04/27/2023
From:	Milster L; Entergy Nuclear Operations
To:	; Office of Nuclear Reactor Regulation, Document Control Desk
References
	W3F1-2023-0033
	Download: ML23117A325 (1)
	v • d • e

~ entergy Leia Milster Manager Regulatory Assurance 504-739-6250 W3F1-2023-0033 April 27, 2023 ATTN : Document Control Desk U.S . Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Annual Radiological Environmental Operating Report - 2022 Waterford Steam Electric Station, Unit 3 Docket No. 50-382 Renewed Facility Operating License No. NPF-38 Attached is the Annual Radiological Environmental Operating Report for the period of

January 1 through December 31, 2022. This report is submitted pursuant to the requirements of Waterford 3 Technical Specification Section 6.9.1 .7.

There are no commitments contained in this submittal.

If you have any questions, please contact Leia Milster, Regulatory Assurance Manager, at 504-739-6250.

Respectfully, ic,~uk Leia Milster LM/llb

Enclosure:

Annual Radiological Environmental Operating Report - 2022 cc: NRC Region IV Regional Administrator NRC Senior Resident Inspector - Waterford Steam Electric Station, Unit 3 NRC Project Manager - Waterford Steam Electric Station, Unit 3 Entergy Legal, General Sr Counsel Entergy Operations, Inc., 17265 River Road , Killona , LA 70057

Enclosure to W3F1-2023-0033 Annual Radiological Environmental Operating Report - 2022 (53 pages follow)

2022 Annual Radiological Environmental Operating Report Waterford 3 Document Number: 50-382 Date: 4-JJ-d_?

Bo Boudreaux Chemistry Technician Review~

TerryParri II Chemistry Supervisor

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Reviewer: -~-~-~-~-*:,,-~~~=--* Date: 4 - 1.,,£ '2....3 Michelle Beavers Effluent Specialist Approved: {1q~ Io~

Catherin Danos Chemistry Manager

Page 1 of 52 Plant: Waterford 3 YEAR: 2022 Docket Number: 50-382 Annual Radiological Environmental Operating Report

Plant: Waterford 3 Year: 2022 Page 2 of 52 Annual Radiological Environmental Operating Report TABLE OF CONTENTS 1.0 EXECUTIVE

SUMMARY

.............................................................................................................5 1.1 Radiological Environmental Monitoring Program ...................................................................5 1.2 Reporting Levels ...................................................................................................................5 1.3 Comparison to State Program ...............................................................................................6 1.4 Sample Deviations ................................................................................................................6 1.5 Program Modifications...........................................................................................................6

2.0 INTRODUCTION

........................................................................................................................6 2.1 Radiological Environmental Monitoring Program ...................................................................6 2.2 Pathways Monitored ..............................................................................................................7 2.3 Land Use Census..................................................................................................................7 3.0 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS ......................8 4.0 INTERPRETATION AND TRENDS OF RESULTS ....................................................................19 4.1 Air Particulate and Radioiodine Sample Results..................................................................19 4.2 Thermoluminescent Dosimetry (TLD) Sample Results ........................................................20 4.3 Waterborne Sample Results................................................................................................21 4.3.1 Surface Water Results ............................................................................................................... 21 4.3.2 Drinking/Surface Water Results ................................................................................................. 21 4.3.3 Sediment Sample Results .......................................................................................................... 22 4.4 Ingestion Sample Results ....................................................................................................22 4.4.1 Fish Sample Results ................................................................................................................... 22 4.4.2 Broad Leaf Vegatation Sample Results ...................................................................................... 22 4.4.3 Milk Sample Results .................................................................................................................... 22 4.5 Land Use Census Results ...................................................................................................23 4.6 Interlaboratory Comparison Results ....................................................................................25 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

..........................25

Plant: Waterford 3 Year: 2022 Page 3 of 52 Annual Radiological Environmental Operating Report ATTACHMENTS - Sample Deviations ........................................................................................................30 - Monitoring Results Tables ............................................................................................31 - Interlaboratory Comparison Program Results ...............................................................46 TABLES Table 1: Exposure Pathway - Airborne ........................................................................................8 Table 2: Exposure Pathway - Direct Radiation ............................................................................9 Table 3: Exposure Pathway - Waterborne .................................................................................13 Table 4: Exposure Pathway - Ingestion .....................................................................................14 Table 5: Land Use Census - 2022 Land Use Census Results ...................................................24 Table 6: Radiological Environmental Monitoring Program Summary .........................................26 Table 7: Sample Deviations Table.............................................................................................30 Table 8: Air Particulate Data Table............................................................................................31 Table 9: Radioiodine Cartridge Data Table ...............................................................................32 Table 10: Air Particulate Composite Data Table ........................................................................33 Table 11: Thermoluminescent Dosimeters - Inner Ring .............................................................34 Table 12: Thermoluminescent Dosimeters - Outer Ring ............................................................34 Table 13: Thermoluminescent Dosimeters - Special Interest Areas ..........................................35 Table 14: Thermoluminescent Dosimeters - Control..................................................................35 Table 15: Surface Water - Gamma............................................................................................36 Table 16: Surface Water - Tritium .............................................................................................37 Table 17: Drinking/Surface Water - Gamma and Gross Beta ....................................................38 Table 18: Drinking/Surface Water - Iodine-131..........................................................................39 Table 19: Drinking/Surface Water - Tritium ...............................................................................40 Table 20: Sediment - Gamma ...................................................................................................41 Table 21: Fish - Gamma............................................................................................................42

Plant: Waterford 3 Year: 2022 Page 4 of 52 Annual Radiological Environmental Operating Report TABLES Cont'd Table 22: Broad Leaf Vegatation - Gamma ...............................................................................43 Table 23: Milk - Gamma and Iodine-131 ...................................................................................44 Table 24: Analytics Environmental Radioactivity Cross Check Program....................................47 Table 25: DOE's Mixed Analyte Performance Evaluation Program (MAPEP) ............................49 Table 26: ERA Environmental Radioactivity Cross Check Program ..........................................50 Table 27: Percentage of Individual Dosimeters that passed EDC internal criteria January - December 2022 ........................................................................................51 Table 28: Mean Dosimeter Analyses (N=6) January - December 2022 ....................................52 Table 29: Summary of Independent Dosimeter testing January - December 2022 ...................52 FIGURES Figure 1: Exposure Pathway .....................................................................................................15 Figure 2: REMP Samples Within 2 Miles of Waterford 3............................................................16 Figure 3: REMP Samples Within 2 to 10 Miles of Waterford 3...................................................17 Figure 4: REMP Samples Within 10 to 50 Miles of Waterford 3 .................................................18 Figure 5: TLD Radiation Dose Comparison By Year .................................................................20

Plant: Waterford 3 Year: 2022 Page 5 of 52 Annual Radiological Environmental Operating Report 1.0 EXECUTIVE

SUMMARY

1.1 Radiological Environmental Monitoring Program The Annual Radiological Environmental Operating Report presents data obtained through analyses of environmental samples collected for Waterford 3 Radiological Environmental Monitoring Program (REMP) for the period January 1 through December 31, 2022. This report fulfills the requirements of Waterford 3 Technical Specification 6.9.1.7.

All required lower limit of detection (LLD) capabilities were achieved in all sample analyses during 2022, as required by Waterford 3s Technical Requirements Manual (TRM) Table 4.12-1. No measurable levels of radiation above baseline levels attributable to Waterford 3's operation were detected in the vicinity of Waterford 3.

The 2022 Radiological Environmental Monitoring Program thus substantiated the adequacy of source control and effluent monitoring at Waterford 3 with no observed impact of plant operations on the environment.

Waterford 3 established the REMP prior to the station becoming operational in 1985 to provide data on background radiation and radioactivity normally present in the area. Waterford 3 has continued to monitor the environment by sampling air, water, sediment, fish and broad leaf, as well as measuring direct radiation. Waterford 3 also samples milk if milk-producing animals used for human consumption are present within five miles (8 km) of the plant.

The REMP includes sampling indicator and control locations within an approximate 31-mile radius of the plant. The REMP utilizes indicator locations near the site to show any increases or buildup of radioactivity that might occur due to station operation and control locations farther away from the site to indicate the presence of only naturally occurring radioactivity. Waterford 3 personnel compare indicator results with control and preoperational results to assess any impact Waterford 3 operation might have had on the surrounding environment.

In 2022, environmental samples were collected for radiological analysis. The results of indicator locations were compared with control locations and previous studies. It was concluded that no significant relationship exists between Waterford 3 operation and effect on the area around the plant. The review of 2022 data showed radioactivity levels in the environment were undetectable in many locations and near background levels in significant pathways.

1.2 Reporting Levels Waterford 3's review indicates that no samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples, as outlined in Technical Requirements Manual (TRM) Table 3.12-2 when averaged over any calendar quarter, due to Waterford 3 effluents. Therefore, 2022 results did not trigger any radiological monitoring program special reports.

Plant: Waterford 3 Year: 2022 Page 6 of 52 Annual Radiological Environmental Operating Report 1.3 Comparison to State Program Waterford 3 personnel compared REMP data to state monitoring programs as results became available. Historically, the programs used for comparison have included the U.S. Nuclear Regulatory Commission (NRC) Thermoluminescent Dosimeter (TLD)

Direct Radiation Monitoring Network and the Environmental Radiological Laboratory -

Department of Environmental Quality Laboratory Services Division (ERL-DEQLSD).

The NRC TLD Network Program was discontinued in 1998. Historically these results have compared to those from the Waterford 3 REMP. Waterford 3s TLD results continue to remain similar to the historical average and continue to verify that plant operation is not affecting the ambient radiation levels in the environment.

The ERL-DEQLSD and the Waterford 3 REMP entail similar radiological environmental monitoring program requirements. These programs include collecting air samples and splitting or sharing sample media such as water, sediment and fish.

Both programs have obtained similar results over previous years.

1.4 Sample Deviations During 2022, environmental sampling was performed for seven media types addressed in the ODCM and for direct radiation. A total of 467 samples of the 472 scheduled were obtained. Of the scheduled samples, 98.9% were collected and analyzed in accordance with the requirements specified in the ODCM. Attachment 1 contains the listing of sample deviations and actions taken.

1.5 Program Modifications Milk collection was removed from the 2022 sampling program due to the lack of indicator and control sampling locations. There were no other program modifications during the reporting period.

2.0 INTRODUCTION

2.1 Radiological Environmental Monitoring Program Waterford 3 established the REMP to ensure that plant operating controls properly function to minimize any associated radiation endangerment to human health or the environment. The REMP is designed for:

Analyzing applicable pathways for anticipated types and quantities of radionuclides released into the environment.

Considering the possibility of a buildup of long-lived radionuclides in the environment and identifying physical and biological accumulations that may contribute to human exposures.

Considering the potential radiation exposure to plant and animal life in the environment surrounding Waterford 3.

Correlating levels of radiation and radioactivity in the environment with radioactive releases from station operation.

Plant: Waterford 3 Year: 2022 Page 7 of 52 Annual Radiological Environmental Operating Report 2.2 Pathways Monitored The airborne, direct radiation, waterborne and ingestion pathways are monitored as required by Waterford 3 TRM Table 3.12-1. A description of the REMP utilized to monitor the exposure pathways is described in the attached Tables and Figures.

Section 4.0 of this report provides a discussion of 2022 sampling results with Section 5.0 providing a summary of results for the monitored exposure pathways.

2.3 Land Use Census Waterford 3 conducts a land use census biennially, as required by Section 3.12.2 of the TRM. The purpose of this census is to identify changes in uses of land within five miles of Waterford 3 that would require modifications to the REMP and the Offsite Dose Calculation Manual (ODCM/TRM). The most important criteria during this census are to determine the location in each sector of the nearest:

1) Residence

2) Animal milked for human consumption

3) Garden of greater than 50 m2 (500 ft2) producing broad leaf vegetation.

Waterford 3 conducts the land use census by:

Field surveys in each meteorological sector out to five miles in order to confirm:

Nearest permanent residence Nearest garden > 50 square meters Nearest beef cow Nearest milking animal

Identifying locations on maps, measuring distances to Waterford 3 and recording results on data sheets.

Comparing current census results to previous results.

Plant: Waterford 3 Year: 2022 Page 8 of 52 Annual Radiological Environmental Operating Report 3.0 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS Table 1: Exposure Pathway - Airborne Sample Point Description Sampling and Collection Requirement Type and Frequency Of Analyses Distance and Direction Frequency RADIOIODINE AND PARTICULATES

APQ-1 (NW, 0.81 Miles) -

(West bank) Located in Three samples from close to the three SITE Continuous sampler operation

Radioiodine Canisters - I-131 analysis biweekly.

soybean/sugarcane field off LA BOUNDARY locations, in different sectors, in with sample collection biweekly, 18 east of LA 18/3141

Air Particulate - Gross beta radioactivity analysis or near sectors having the highest calculated or more frequently if required by intersection. following filter change. Gamma isotopic analysis of annual average ground-level D/Q. dust loading.

APF-1 (ESE, 0.35 Miles) - composite (by location) quarterly.

(West bank) Located on north side of Secondary Meteorological Tower.

APC-1 (NE, 0.67 Miles) - (East bank) Located inside Little Gypsy Cooling Water Intake Structure fence.

RADIOIODINE AND PARTICULATES

APP-1 (WNW, 0.84 Miles) - Continuous sampler operation

Radioiodine Canisters - I-131 analysis biweekly.

(West bank) Located in with sample collection biweekly, One sample from the vicinity of a community or more frequently if required by

Air Particulate - Gross beta radioactivity analysis soybean/sugarcane field on having the highest calculated annual average dust loading. following filter change. Gamma isotopic analysis of Short St. in Killona.

ground level D/Q. composite quarterly.

RADIOIODINE AND PARTICULATES

APE-26 (E, 25.8 Miles) - (West Continuous sampler operation

Radioiodine Canisters - I-131 analysis biweekly.

bank) Located at Entergy office with sample collection biweekly, One sample from a control location, as for or more frequently if required by

Air Particulate - Gross beta radioactivity analysis on Virgil Street in Gretna.

example 15 - 30 km distance and in the least dust loading. following filter change. Gamma isotopic analysis of (Control) prevalent wind direction. composite quarterly.

Plant: Waterford 3 Year: 2022 Page 9 of 52 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS

A-2 (N, 1.27 Miles) - (East bank)

Located on pole on LA 628 at Zephrin An inner ring of stations, one in each Quarterly

Gamma dose quarterly.

L. Perriloux Fire House.

meteorological sector in the general area of the SITE BOUNDARY.

B-1 (NNE, 0.75 Miles) - (East bank)

Located on fence west of Little Gypsy.

C-1 (NE, 0.67 Miles) - (East bank)

Located on fence at Little Gypsy Cooling Water Intake structure.

D-2 (ENE, 1.24 Miles) - (East bank)

Located on pole on levee at west entrance to Bonnet Carre Spillway

E-1 (E, 0.41 Miles) - (West bank)

Located on pole on LA 18 east of Waterford 3 plant entrance.

F-2 (ESE, 1.15 Miles) - (West bank)

Located on fence on LA 3142 south of LA 18.

G-2 (SE, 1.26 Miles) - (West bank)

Located on fence on LA 3142 north of railroad overpass.

H-2 (SSE, 1.54 Miles) - (West bank)

Located on fence on LA 3142 north of LA 3127/3142 intersection.

Plant: Waterford 3 Year: 2022 Page 10 of 52 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS

J-2 (S, 1.38 Miles) - (West bank)

Located on fence south of LA 3127 An inner ring of stations, one in each Quarterly

Gamma dose quarterly.

west of LA 3127/3142 intersection.

meteorological sector in the general area of the SITE BOUNDARY.

K-1 (SSW, 1.06 Miles) - (West bank)

Located on stop sign at entrance to Entergy Education Center on LA 3127.

L-1 (SW, 1.06 Miles) - (West bank)

Located on gate on LA 3127 west of LA 3127/3142 intersection.

M-1 (WSW, 0.76 Miles) - (West bank)

Located on south gate of Waterford 1 and 2.

N-1 (W, 0.98 Miles) - (West bank)

Located on pole at corner of Railroad Avenue and School House Road.

P-1 (WNW, 0.84 Miles) - (West bank)

Located on fence enclosing air sample station APP-1.

Q-1 (NW, 0.81 Miles) - (West bank)

Located on fence enclosing air sample station APQ-1.

R-1 (NNW, 0.51 Miles) - (West bank)

Located at Waterford 1 and 2 Cooling Water Intake Structure.

Plant: Waterford 3 Year: 2022 Page 11 of 52 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Sampling and Requirement Type and Frequency Of Analyses Distance and Direction Collection Frequency TLDS

A-5 (N, 4.59 Miles) - (East bank)

Located on pole at intersection of An outer ring of stations, one in ten of the Quarterly

Gamma dose quarterly.

Oswald Avenue and US 61.

meteorological sectors in the 6 to 8 km ranges from the site.

B-4 (NNE, 3.75 Miles) - (East bank)

Located on pole near weigh station on US 61.

D-5 (ENE, 4.09 Miles) - (East bank)

Located on gate on shell road north of US 61/LA 48 intersection.

E-5 (E, 3.90 Miles) - (East bank)

Located on fence on Wesco Street off LA 48.

F-4 (ESE, 3.53 Miles) - (West bank)

Located on pole behind house at 646 Aquarius St. in Hahnville.

G-4 (SE, 3.30 Miles) - (West bank)

Located on pole on LA 3160 north of railroad track.

H-8 (SSE, 8.13 Miles) - (West bank)

Located on pole in front of Hahnville High School.

P-6 (WNW, 5.58 Miles) - (West bank) Located on fence at LA 640/railroad track intersection.

Q-5 (NW, 5.01 Miles) - (West bank)

Located on pole on LA 18 across from Mississippi River marker 137.

R-6 (NNW, 5.52 Miles) - (East bank)

Located on fence on LA 3223 near railroad crossing.

Plant: Waterford 3 Year: 2022 Page 12 of 52 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS

E-15 (E, 11.7 Miles) - (East bank)

Located on fence on Alliance The balance of the stations (five) to be placed Quarterly

Gamma dose quarterly.

Avenue.

in special interest areas such as population centers, nearby residences, schools, and in

F-9 (ESE, 8.18 Miles) - (East bank) one or two areas to serve as control locations. Located on fence north of railroad tracks on Jonathan Street.

G-8 (SE, 7.74 Miles) - (West bank)

Located on back fence of Luling Entergy Office.

J-15 (S, 11.7 Miles) - (West bank)

Located on pole near LA 631/Hwy 90 intersection in Des Allemands.

E-26 (E, 25.8 Miles) - (West bank)

Located at Entergy office on Virgil Street in Gretna. (Control)

Plant: Waterford 3 Year: 2022 Page 13 of 52 Annual Radiological Environmental Operating Report Table 3: Exposure Pathway - Waterborne Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency

SWP-7 (WNW, 7.37 Miles) - (West bank) Located at St. John Parish Composite sample over

Gamma isotopic analysis and tritium analysis Waterworks in Edgard. (Control) one quarter period. quarterly.

SWF-2 (ESE, 1.51 Miles) - (West SURFACE WATER bank) Located at Dow Chemical Plant One sample upstream and one sample drinking water canal.

downstream.

SWE-5 (E, 4.59 Miles) - (East bank)

Located at St. Charles Parish Waterworks in New Sarpy.

SWK-1 (SSW, 0.49 Miles) - (West bank) Located at 40 Arpent Canal south of the plant.

DRINKING WATER

DWP-7 (WNW, 7.37 Miles) - (West bank) Located at St. John Parish One sample upstream and one sample Composite sample over

I-131 analysis on each composite when the dose Waterworks in Edgard. (Control) downstream. one month period when I- calculated for the consumption of the water is

DWF-2 (ESE, 1.51 Miles) - (West 131 analysis is performed, greater than one mrem per year. Composite for bank) Located at Dow Chemical Plant quarterly composite gross beta and gamma isotopic analyses quarterly.

drinking water canal. otherwise. Composite for tritium analysis quarterly.

DWE-5 (E, 4.59 Miles) - (East bank)

Located at St. Charles Parish Waterworks in New Sarpy.

SEDIMENT FROM SHORELINE

SHWQ-6 (NW, 5.99 Miles) - (East bank) Located on LA 628 east of One sample upstream and one sample Annually

Gamma isotopic analysis annually.

Reserve ferry landing. (Control) downstream.

SHWE-3 (E, 2.99 Miles) - (West bank) Located at Foot Ferry landing on LA 18.

SHWK-1 (SSW, 0.49 Miles) - (West bank) Located at 40 Arpent Canal south of plant.

Plant: Waterford 3 Year: 2022 Page 14 of 52 Annual Radiological Environmental Operating Report Table 4: Exposure Pathway - Ingestion Sample Point Description Distance Sampling and Collection Requirement Type and Frequency Of Analyses and Direction Frequency MILK

Samples from milking animals in the three

MKE-3 (E, 2.35 Miles) - (West bank) Quarterly (When Available)

Gamma isotopic and I-131 analysis quarterly.

locations within 5 km distance having the Located at the Zeringues house on LA highest dose potential. If there are none, 18 in Taft.

then, one sample from milking animals in each of the three areas between 5 to 8

MKA-31 (N, 31.2 Miles) - (East bank) km distant where doses are calculated to Located at 18736 Sisters Road, be greater than 1 mrem per year. Ponchatoula, LA. (Control)

One sample from milking animals at a control location 15 - 30 km distant and in the least prevalent wind direction.

FISH AND INVERTEBRATES

FH-2 (Distance/Direction Not Applicable) - Downstream of the plant

One sample of each commercially and/or Sample in season, or

Gamma isotopic analysis on edible portions discharge structure.

recreationally important species in vicinity annually if they are not annually.

of plant discharge area.

FH-3 (Distance/Direction Not seasonal.

Applicable) - (Westbank) Waterways

One sample of same species in area not downstream of plant discharge directed influenced by plant discharge. to 40 Arpent Canal.

FH-1 (Distance/Direction Not Applicable) - Upstream of the plant intake structure. (Control)

BROAD LEAF VEGATATION

BLQ-1 (NW, 0.83 Miles) - (West bank)

Located near air sample station APQ-1.

Samples of one to three different types of Quarterly during the growing

Gamma isotopic and I-131 analysis quarterly.

broadleaf vegetation grown nearest each

BLB-1 (NNE, 0.81 Miles) - (East bank) season.

of the two different off-site locations of Located west of Little Gypsy on LA 628 highest predicted annual average ground level D/Q if milk sampling is not

BLE-20 (E, 19.7 Miles) - (West bank) performed. Located on property of Nine Mile Point in Westwego. (Control)

One sample of each of the similar broadleaf vegetation grown 15 - 30 km distant in the least prevalent wind direction if milk sampling is not performed.

Plant: Waterford 3 Year: 2022 Page 15 of 52 Annual Radiological Environmental Operating Report Figure 1: Exposure Pathway

Plant: Waterford 3 Year: 2022 Page 16 of 52 Annual Radiological Environmental Operating Report Figure 2: REMP Samples Within 2 Miles of Waterford 3

Plant: Waterford 3 Year: 2022 Page 17 of 52 Annual Radiological Environmental Operating Report Figure 3: REMP Samples within 2 to 10 Miles of Waterford 3

Plant: Waterford 3 Year: 2022 Page 18 of 52 Annual Radiological Environmental Operating Report Figure 4: REMP Samples within 10 to 50 Miles of Waterford 3

Plant: Waterford 3 Year: 2022 Page 19 of 52 Annual Radiological Environmental Operating Report 4.0 INTERPRETATION AND TRENDS OF RESULTS 4.1 Air Particulate and Radioiodine Sample Results Samples of airborne particulate and radioiodine were collected at four indicator locations and one control location and analyzed for gross beta radionuclides, Iodine-131 and gamma radionuclides (quarterly air particulate filter composites only).

Waterford 3 did not detect any gamma radionuclides in the quarterly air particulate composites or Iodine-131 in the radioiodine cartridges during the reporting period as has been the case in previous years. Indicator gross beta air particulate results for 2022 were similar to background levels obtained during previous years of the operational REMP and well below preoperational levels as seen below. Results are reported as annual average pCi/m3.

Monitoring Period Result 2012 - 2021 (Minimum Value) 0.017 2022 Average Value 0.021 2012 - 2021 (Maximum Value) 0.024 Preoperational 0.080 In the absence of plant-related gamma radionuclides, gross beta activity is attributed to naturally occurring radionuclides. Table 6, which includes gross beta concentrations and provides a comparison of the indicator and control means and ranges, emphasizes the consistent trends seen in this pathway to support the presence of naturally occurring activity. Therefore, it can be concluded that the airborne pathway continues to be unaffected by Waterford 3 operations.

Plant: Waterford 3 Year: 2022 Page 20 of 52 Annual Radiological Environmental Operating Report 4.2 Thermoluminescent Dosimetry (TLD) Sample Results Waterford 3 reports measured dose as net exposure (field reading less transit reading) normalized to 92 days and relies on comparison of the thirty indicator locations to the one control as a measure of plant impact. Waterford 3s comparison of the inner ring, outer ring, and special interest area TLD results to the control, as seen in Table 6, identified no noticeable trend that would indicate that the ambient radiation levels are being affected by plant operations. In addition, the average indicator value of 11.8 millirem (mrem) shown in the TLD radiation dose comparison graph below shows the 2022 concentration is comparable to historic results. Overall, Waterford 3 concluded that the ambient radiation levels are not being affected by plant operations.

The average exposure rates during 2022 are consistent with those from the preoperational program and the previous five years of operation. In particular, the preoperational survey indicates that exposure rates ranged between 11 and 33 mrem/standard quarter with an average of 20 mrem/standard quarter. The range during the previous five years of operation was 9 to 15 mrem/standard quarter with an average exposure rate of 11.4 mrem/standard quarter.

A comparison of the indicator results to the control results, as seen in Table 6, shows that the average indicator locations are slightly higher than that of the control. As shown in Attachment 2, Tables 11-14, several indicator locations are higher than the control by a few mrem with a maximum difference of 7.8 mrem/std. qtr. The differences between indicator locations and the control, and TLD stations grouped by distance from the plant are expected due to a variety of factors not related to Waterford 3 plant operations that can affect background radiation in the vicinity of each TLD station.

Plant: Waterford 3 Year: 2022 Page 21 of 52 Annual Radiological Environmental Operating Report 4.3 Waterborne Sample Results Analytical results for 2022 drinking water/surface water samples were similar to those reported in previous years. Gamma radionuclides, iodine-131 and tritium analytical results for 2022 waterborne samples were below the ODCM-required LLD similar to those reported in previous years. Gross Beta continues to be detected in Waterford 3 drinking water samples consistent with historical results. These results are further explained below.

4.3.1 Surface Water Results Samples were collected from one indicator location and analyzed for gamma radionuclides and tritium. Gamma radionuclides were below detectable limits which is consistent with results seen in previous operational years. Tritium was not detected in any of the quarterly samples. Therefore, the operation of Waterford 3 had no definable impact on this waterborne pathway in 2022.

4.3.2 Drinking/Surface Water Results Drinking water samples also serve as surface water samples for Waterford 3.

Therefore, monthly and quarterly gamma spectroscopy and tritium analyses of drinking water also satisfy the surface water sampling requirement.

Samples were collected from two indicators and one control location.

Drinking/Surface water samples were analyzed for, gamma radionuclides, gross beta, iodine-131, and tritium. Gamma radionuclides, iodine-131, and tritium concentrations were below the LLD limits at the indicator and control locations. Gross beta was detected in both indicator and control locations. The average concentration of the indicator locations is comparable to the 2012 - 2021 operational years and below background preoperational data as shown below. Gross beta results from 2022 are summarized in Table 6. Results are reported as annual average pCi/L.

Monitoring Period Result 2012 - 2021 (Minimum Value) 3.8 2022 Average Value 4.2 2012 - 2021 (Maximum Value) 6.6 Preoperational 7.0 Table 17, which includes gross beta concentrations for 2022, provides a comparison of the indicator and control means. It shows that the waterborne pathway continues to remain at background levels. Waterford 3 personnel have noted no definable trends associated with drinking water results at the indicator location. Therefore, the operation of Waterford 3 had no definable impact on this waterborne pathway in 2022 and levels of radionuclides remain similar to those obtained in previous operational years.

Plant: Waterford 3 Year: 2022 Page 22 of 52 Annual Radiological Environmental Operating Report 4.3.3 Sediment Sample Results Sediment samples were collected from two indicators and one control location in 2022 and analyzed for gamma radionuclides. Gamma radionuclides were below the LLD limits at both indicator and control locations. Listed below is a comparison of 2022 Cs-137 indicator results to the 2012-2021 operational years. Waterford 3 operations had no significant impact on the environment or public by this waterborne pathway.

Monitoring Period Result 2012-2021 (Minimum Value) <LLD 2022 Value <LLD 2012-2021 (Maximum Value) <LLD 4.4 Ingestion Sample Results 4.4.1 Fish Sample Results Fish samples were collected from two indicator and one control location and analyzed for gamma radionuclides. In 2022, gamma radionuclides were below detectable limits which are consistent with the preoperational monitoring period and operational results. Therefore, based on these measurements, Waterford 3 operations had no significant radiological impact upon the environment or public by this ingestion pathway.

4.4.2 Broad Leaf Vegetation Sample Results The REMP has detected radionuclides prior to 1990 that are attributable to other sources. These include the radioactive plume release due to reactor core degradation at Chernobyl Nuclear Power Plant in 1986 and atmospheric weapons testing.

In 2022, broad leaf vegetation samples were collected from two indicator and one control location and analyzed for iodine-131 and gamma radionuclides. The 2022 levels remained undetectable, as has been the case in recent years. Therefore, based on these measurements, Waterford 3 operations had no significant radiological impact upon the environment or public by this ingestion pathway.

4.4.3 Milk Sample Results Milk samples from the indicator and control location were unavailable for collection during 2022; therefore, broad leaf vegetation sampling was performed as required by TRM 3.12-1. Results are shown in section 4.4.2.

Plant: Waterford 3 Year: 2022 Page 23 of 52 Annual Radiological Environmental Operating Report 4.5 Land Use Census Results The latest land use census was conducted October 4 - October 5, 2022. The nearest residence, garden, beef cow, food product and milk animal in each sector within a five mile radius of the plant was located by visual inspection and verbal inquiry.

The land use census identified several changes in 2022. These changes include one nearest residence change, and 6 nearest garden changes.

The nearest residence change identified was in sector A. The nearest residence in sector A has changed to 109 Evangeline Road at a distance of 1.26 miles from the plant.

The six nearest garden changes identified were in sectors B, C, N, P, Q, and R. The nearest garden in sector B has changed to 148 Evangeline Street at a distance of 1.30 miles from the plant. The nearest garden in sector C has changed to 254 Union Street at a distance of 1.12 miles from the plant. The nearest garden in sector N has changed to 390 Post Street at a distance of 1.04 miles from the plant. The nearest garden in sector P has changed to 313 Post Street at a distance of 0.96 miles from the plant. The nearest garden in sector Q has changed to 174 Post Street at a distance of 0.94 miles from the plant. The nearest garden in sector R has changed to 171 Glendale Plantation Road at a distance of 3.05 miles from the plant.

Based upon the locations identified in this survey, the locations identified in previous surveys and the locations currently being used to calculate dose commitments from liquid and gaseous effluents released from Waterford 3, no REMP sampling location changes are necessary. Results of the 2022 biennial census are shown in Table 5.

Plant: Waterford 3 Year: 2022 Page 24 of 52 Annual Radiological Environmental Operating Report Table 5: 2022 Land Use Census Results Nearest Nearest Nearest Milk Nearest Beef Cow Nearest Sector Direction Residence Garden (miles) Cow (miles) (miles) Goat (miles)

(miles)

A N 1.3 1.3 ^ 3.6 *3.8 B NNE 1.0 1.3 ^ 1.9 ^

C NE 0.9 1.1 ^ ^ ^

D ENE 0.9 0.9 ^ ^ ^

E E 2.3 2.3 ^ 2.3 ^

F ESE 3.2 2.3 ^ 2.3 ^

G SE 4.0 4.0 ^ 2.5 ^

H SSE ^ ^ ^ ^ ^

J S ^ ^ ^ ^ ^

K SSW ^ ^ ^ ^ ^

L SW ^ ^ ^ ^ ^

M WSW ^ ^ ^ ^ ^

N W 0.9 1.0 ^ ^ ^

P WNW 0.9 1.0 ^ ^ ^

Q NW 0.9 0.9 ^ ^ ^

R NNW 3.1 3.1 ^ 5.0 ^

Symbol Comment

^ Nothing was located within a five-mile radius of Waterford 3.

Animals were located at this distance from Waterford 3, but the milk is not used for human consumption.

Plant: Waterford 3 Year: 2022 Page 25 of 52 Annual Radiological Environmental Operating Report 4.6 Interlaboratory Comparison Results Attachment 3 contains result summary for Interlaboratory Comparison program for Teledyne Brown Engineering and Environmental Dosimetry services to fulfill the requirements of section 5.7.2 of the ODCM.

5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

1. Table 6, Radiological Environmental Monitoring Program Summary, summarizes data for the 2022 REMP.

Plant: Waterford 3 Year: 2022 Page 26 of 52 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest Annual [Range]

[Range] (F)(3) [Range] Results(5)

Mean]

GB / 130 0.01 0.0212 (104 / 104) APF-1 0.0222 (26 / 26) 0.0211 (26 / 26) 0

[0.0098 - 0.034] (299°- 0.35 mi) [0.0125 - 0.0316] [0.0100 - 0.0302]

Air Particulate (pCi/m3) GS / 20 Cs-134 0.05 < LLD N/A N/A < LLD 0 Cs-137 0.06 < LLD N/A N/A < LLD 0 I-131 / 130 0.07 < LLD N/A N/A < LLD 0 Airborne Iodine (pCi/m3)

Inner Ring TLD Gamma / 64 (6) 11.4 (64 / 64) B-1 13.4 (4 / 4) N/A 0 (mR/Qtr) [9.0 - 15.2] (200°- 0.75 mi) [12.5 - 15.2]

Outer Ring TLD Gamma / 39 (6) 12.8 (39 / 39) P-6 14.5 (4 / 4) N/A 0 (mR/Qtr) [9.2 - 16.9] (107°- 5.58 mi) [13.4 - 16.9]

Special Interest Gamma / 16 (6) 10.9 (16 / 16) G-8 11.6 (4 / 4) N/A 0 TLD (mR/Qtr) [9.7 - 12.9] (305°- 7.74 mi) [11.0 - 12.9]

Control TLD Gamma / 4 (6) N/A N/A N/A 9.5 (4 / 4) 0 (mR/Qtr) [9.1 - 10.7]

Plant: Waterford 3 Year: 2022 Page 27 of 52 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest Annual [Range]

[Range] (F)(3) [Range] Results(5)

Mean]

H-3 / 5 2000 < LLD N/A N/A N/A 0 GS / 14 Mn-54 15 < LLD N/A N/A N/A 0 Co-58 15 < LLD N/A N/A N/A 0 Fe-59 30 < LLD N/A N/A N/A 0 Co-60 15 < LLD N/A N/A N/A 0 Surface Water Zn-65 30 < LLD N/A N/A N/A 0 (pCi/L)

Nb-95 15 < LLD N/A N/A N/A 0 I-131 15 < LLD N/A N/A N/A 0 Zr-95 15 < LLD N/A N/A N/A 0 Cs-134 15 < LLD N/A N/A N/A 0 Cs-137 18 < LLD N/A N/A N/A 0 Ba-140 15 < LLD N/A N/A N/A 0 La-140 15 < LLD N/A N/A N/A 0

Plant: Waterford 3 Year: 2022 Page 28 of 52 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest Annual [Range]

[Range] (F)(3) [Range] Results(5)

Mean]

GB / 15 4 4.2 (10 / 10) DW/SWF-2 4.5 (5 / 5) 4.3 (5 / 5) 0

[3.1 - 6.2] (302°- 1.51 mi) [3.1 - 6.2] [3.2 - 5.8]

I-131 / 43 1 < LLD N/A N/A < LLD 0 H-3 / 15 2000 < LLD N/A N/A < LLD 0 GS / 15 Mn-54 15 < LLD N/A N/A < LLD 0 Drinking/Surface Co-58 15 < LLD N/A N/A < LLD 0 Water (pCi/L)

Fe-59 30 < LLD N/A N/A < LLD 0 Co-60 15 < LLD N/A N/A < LLD 0 Zn-65 30 < LLD N/A N/A < LLD 0 Nb-95 15 < LLD N/A N/A < LLD 0 Zr-95 15 < LLD N/A N/A < LLD 0 Cs-134 15 < LLD N/A N/A < LLD 0 Cs-137 18 < LLD N/A N/A < LLD 0 Ba-140 15 < LLD N/A N/A < LLD 0 La-140 15 < LLD N/A N/A < LLD 0 GS / 3 Sediment Cs-134 150 < LLD N/A N/A < LLD 0 (pCi/kg dry)

Cs-137 180 < LLD N/A N/A < LLD 0

Plant: Waterford 3 Year: 2022 Page 29 of 52 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest Annual [Range]

[Range] (F)(3) [Range] Results(5)

Mean]

GS / 12 Mn-54 130 < LLD N/A N/A < LLD 0 Co-58 130 < LLD N/A N/A < LLD 0 Fish Fe-59 260 < LLD N/A N/A < LLD 0 (pCi/kg wet) Co-60 130 < LLD N/A N/A < LLD 0 Zn-65 260 < LLD N/A N/A < LLD 0 Cs-134 130 < LLD N/A N/A < LLD 0 Cs-137 150 < LLD N/A N/A < LLD 0 GS / 12 Broad Leaf I-131 60 < LLD N/A N/A N/A 0 (pCi/kg wet) Cs-134 60 < LLD N/A N/A N/A 0 Cs-137 80 < LLD N/A N/A N/A 0 I-131 / 0 1 N/A N/A N/A N/A 0 Milk GS / 0 (pCi/L) Cs-134 15 N/A N/A N/A N/A 0

Milk samples were unavailable in 2022. Cs-137 18 N/A N/A N/A N/A 0 Ba-140 15 N/A N/A N/A N/A 0 La-140 15 N/A N/A N/A N/A 0 LEGEND:

(1)

- GB = Gross beta; I-131 = Iodine-131; H-3 = Tritium; GS = Gamma scan.

(2)

- LLD = Required lower limit of detection based on Waterford 3 TRM Table 4.12-1.

(3)

- Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis (F).

(4)

- Locations are specified (1) by name and (2) degrees relative to reactor site.

(5)

- Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

(6)

- LLD is not defined in Waterford 3 TRM.

Plant: Waterford 3 Year: 2022 Page 30 of 52 Annual Radiological Environmental Operating Report Attachment 1 Page 1 of 1 Sample Deviations Table 7: Sample Deviations Table Sample Comment Sample Media Date Problem Evaluation / Actions No. Location Affected Milk samples from indicator station MKE-3 were unavailable for all four quarters Sample of 2022 due to there being no indicator milk animals within 8 km of the plant.

1 Milk MKE-3 2022 Unavailable Broad Leaf vegetation sampling was performed in place of the milk indicator sampling.

Milk samples from control station MKA-31 were not collected in 2022 due to Sample 2 Milk MKA-31 2022 there being no indicator milk animals within 8 km of the plant. Broad Leaf Unavailable vegetation sampling was performed in place of the milk indicator sampling.

The air particulate and charcoal sample collected from 05/16/22-05/30/22 had 05/16/22-3 AP/C APP-1 Low Volume low volumes due to a loss of power to the sample pump. Electricians restored 05/30/22 power to the pump.

TLD from station H-8 was unable to be analyzed due to sample being missing at 4 TLD H-8 3rd Quarter Sample Missing time of collection. A new TLD was put in place.

The air particulate and charcoal sample collected from 12/12/22-12/26/22 had 12/12/22-5 AP/C APP-1 Low Volume low volumes due a power outage associated with severe weather in the area.

12/26/22 The sample pump operated as expected once power was restored to the area.

Plant: Waterford 3 Year: 2022 Page 31 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 1 of 14 Monitoring Results Tables Table 8: Air Particulate Data Table Analysis: Gross Beta Units: pCi/m3 (1)

APF-1 APQ-1 APP-1 APC-1 APE-26 Start Date End Date (Indicator) (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD 0.01 0.01 0.01 0.01 0.01 12/27/2021 01/10/2022 0.018 0.013 0.016 0.015 0.013 01/10/2022 01/24/2022 0.025 0.025 0.026 0.024 0.023 01/24/2022 02/07/2022 0.018 0.016 0.015 0.016 0.020 02/07/2022 02/21/2022 0.024 0.025 0.024 0.025 0.028 02/21/2022 03/07/2022 0.022 0.021 0.021 0.024 0.021 03/07/2022 03/21/2022 0.022 0.017 0.017 0.018 0.018 03/21/2022 04/04/2022 0.021 0.021 0.022 0.022 0.023 04/04/2022 04/18/2022 0.019 0.020 0.016 0.015 0.016 04/18/2022 05/02/2022 0.024 0.023 0.022 0.021 0.021 05/02/2022 05/16/2022 0.022 0.022 0.021 0.021 0.020 (2) 05/16/2022 05/30/2022 0.022 0.021 0.023 0.023 0.024 05/30/2022 06/13/2022 0.014 0.014 0.015 0.014 0.016 06/13/2022 06/27/2022 0.028 0.027 0.028 0.029 0.029 06/27/2022 07/11/2022 0.017 0.013 0.015 0.015 0.015 07/11/2022 07/25/2022 0.019 0.016 0.015 0.013 0.016 07/25/2022 08/08/2022 0.013 0.012 0.010 0.011 0.010 08/08/2022 08/22/2022 0.028 0.017 0.023 0.016 0.017 08/22/2022 09/05/2022 0.013 0.011 0.011 0.012 0.012 09/05/2022 09/19/2022 0.031 0.023 0.023 0.025 0.024 09/19/2022 10/03/2022 0.029 0.031 0.029 0.030 0.030 10/03/2022 10/17/2022 0.032 0.030 0.031 0.029 0.030 10/17/2022 10/31/2022 0.025 0.028 0.027 0.027 0.028 10/31/2022 11/14/2022 0.025 0.026 0.022 0.025 0.027 11/14/2022 11/28/2022 0.027 0.029 0.029 0.025 0.030 11/28/2022 12/12/2022 0.020 0.022 0.018 0.019 0.018 (3) 12/12/2022 12/26/2022 0.021 0.021 0.034 0.019 0.024 (1)

Station with highest annual mean.

(2)

See Attachment 1, Table 7, Samples Deviations Table, Comment 3 (3)

See Attachment 1, Table 7, Samples Deviations Table, Comment 5

Plant: Waterford 3 Year: 2022 Page 32 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 2 of 14 Monitoring Results Tables Table 9: Radioiodine Cartridge Data Table Analysis: I-131 Units: pCi/m3 APF-1 APQ-1 APP-1 APC-1 APE-26 Start Date End Date (Indicator) (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD 0.07 0.07 0.07 0.07 0.07 12/27/2021 01/10/2022 < 0.007 < 0.015 < 0.014 < 0.014 < 0.014 01/10/2022 01/24/2022 < 0.015 < 0.013 < 0.015 < 0.014 < 0.015 01/24/2022 02/07/2022 < 0.019 < 0.009 < 0.019 < 0.018 < 0.019 02/07/2022 02/21/2022 < 0.014 < 0.012 < 0.014 < 0.013 < 0.014 02/21/2022 03/07/2022 < 0.024 < 0.011 < 0.024 < 0.023 < 0.024 03/07/2022 03/21/2022 < 0.022 < 0.010 < 0.022 < 0.021 < 0.022 03/21/2022 04/04/2022 < 0.013 < 0.009 < 0.013 < 0.013 < 0.013 04/04/2022 04/18/2022 < 0.019 < 0.008 < 0.018 < 0.018 < 0.018 04/18/2022 05/02/2022 < 0.012 < 0.011 < 0.012 < 0.012 < 0.012 05/02/2022 05/16/2022 < 0.016 < 0.018 < 0.017 < 0.007 < 0.017 05/16/2022 05/30/2022 < 0.020 < 0.021 < 0.015(1) < 0.019 < 0.020 05/30/2022 06/13/2022 < 0.016 < 0.017 < 0.008 < 0.016 < 0.016 06/13/2022 06/27/2022 < 0.011 < 0.010 < 0.011 < 0.011 < 0.011 06/27/2022 07/11/2022 < 0.016 < 0.007 < 0.016 < 0.015 < 0.016 07/11/2022 07/25/2022 < 0.016 < 0.008 < 0.016 < 0.015 < 0.016 07/25/2022 08/08/2022 < 0.014 < 0.006 < 0.014 < 0.013 < 0.014 08/08/2022 08/22/2022 < 0.019 < 0.009 < 0.019 < 0.018 < 0.019 08/22/2022 09/05/2022 < 0.015 < 0.016 < 0.015 < 0.006 < 0.015 09/05/2022 09/19/2022 < 0.017 < 0.008 < 0.017 < 0.016 < 0.017 09/19/2022 10/03/2022 < 0.019 < 0.008 < 0.019 < 0.018 < 0.019 10/03/2022 10/17/2022 < 0.016 < 0.007 < 0.017 < 0.015 < 0.017 10/17/2022 10/31/2022 < 0.024 < 0.011 < 0.024 < 0.022 < 0.024 10/31/2022 11/14/2022 < 0.017 < 0.008 < 0.018 < 0.016 < 0.018 11/14/2022 11/28/2022 < 0.021 < 0.009 < 0.021 < 0.019 < 0.021 11/28/2022 12/12/2022 < 0.019 < 0.010 < 0.019 < 0.018 < 0.019 (2) 12/12/2022 12/26/2022 < 0.017 < 0.018 < 0.049 < 0.016 < 0.017 (1)

See Attachment 1, Table 7, Samples Deviations Table, Comment 3 (2)

See Attachment 1, Table 7, Samples Deviations Table, Comment 5

Plant: Waterford 3 Year: 2022 Page 33 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 3 of 14 Monitoring Results Tables Table 10: Air Particulate Composite Data Table Analysis: Gamma Isotopic Units: pCi/m3 Location Collection Date Cs-134 Cs-137 REQUIRED LLD 0.05 0.06 APF-1 (Indicator) 03/21/2022 < 0.003 < 0.003 APQ-1 (Indicator) 03/21/2022 < 0.003 < 0.003 APP-1 (Indicator) 03/21/2022 < 0.002 < 0.002 APC-1 (Indicator) 03/21/2022 < 0.004 < 0.003 APE-26 (Control) 03/21/2022 < 0.003 < 0.003 APF-1 (Indicator) 06/13/2022 < 0.002 < 0.002 APQ-1 (Indicator) 06/13/2022 < 0.004 < 0.002 APP-1 (Indicator) 06/13/2022 < 0.004 < 0.003 APC-1 (Indicator) 06/13/2022 < 0.002 < 0.002 APE-26 (Control) 06/13/2022 < 0.004 < 0.004 APF-1 (Indicator) 09/05/2022 < 0.002 < 0.002 APQ-1 (Indicator) 09/05/2022 < 0.003 < 0.003 APP-1 (Indicator) 09/05/2022 < 0.002 < 0.002 APC-1 (Indicator) 09/05/2022 < 0.004 < 0.003 APE-26 (Control) 09/05/2022 < 0.004 < 0.003 APF-1 (Indicator) 11/28/2022 < 0.002 < 0.002 APQ-1 (Indicator) 11/28/2022 < 0.001 < 0.002 APP-1 (Indicator) 11/28/2022 < 0.002 < 0.002 APC-1 (Indicator) 11/28/2022 < 0.002 < 0.001 APE-26 (Control) 11/28/2022 < 0.003 < 0.002

Plant: Waterford 3 Year: 2022 Page 34 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 4 of 14 Monitoring Results Tables Table 11: Thermoluminescent Dosimeters - Inner Ring Analysis: Gamma Dose Units: mrem/Std. Qtr.

st nd rd th 1 Qtr 2 Qtr 3 Qtr 4 Qtr Annual Mean Station 2022 2022 2022 2022 2022 A-2 11.7 11.7 11.1 13.9 12.1 (1)

B-1 13.1 12.6 12.5 15.2 13.4 C-1 9.1 9.0 9.0 11.0 9.5 D-2 12.4 11.6 12.3 13.7 12.5 E-1 11.2 11.1 11.2 13.3 11.7 F-2 11.0 10.4 11.7 12.9 11.5 G-2 10.9 10.4 10.9 12.2 11.1 H-2 10.3 10.4 11.1 12.4 11.1 J-2 10.0 9.5 10.6 12.0 10.5 K-1 10.9 10.9 11.7 12.9 11.6 L-1 12.1 12.4 12.6 14.9 13.0 M-1 9.9 9.3 10.3 11.6 10.3 N-1 10.1 9.7 10.3 11.6 10.4 P-1 11.1 9.9 10.9 12.1 11.0 Q-1 12.2 11.8 12.3 14.1 12.6 R-1 9.3 9.3 9.3 10.4 9.6 (1)

Inner ring station with highest annual mean.

Table 12: Thermoluminescent Dosimeters - Outer Ring Analysis: Gamma Dose Units: mrem/Std. Qtr.

st nd rd 1 Qtr 2 Qtr 3 Qtr 4th Qtr Annual Mean Station 2022 2022 2022 2022 2022 A-5 12.2 12.0 11.8 14.7 12.7 B-4 13.2 13.0 12.4 15.7 13.6 D-5 12.6 12.3 12.2 13.4 12.6 E-5 12.6 12.0 13.0 15.4 13.3 F-4 13.0 12.9 13.5 15.7 13.8 G-4 10.7 10.4 10.7 12.8 11.2 H-8 13.2 12.9 (2) 15.9 14.0 (1)

P-6 13.6 13.4 13.9 16.9 14.5 Q-5 12.0 11.5 12.5 14.1 12.5 R-6 9.8 9.2 10.0 10.8 10.0 (1)

Outer ring station with highest annual mean.

(2)

See Attachment 1, Table 7, Samples Deviations Table, Comment 4

Plant: Waterford 3 Year: 2022 Page 35 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 5 of 14 Monitoring Results Tables Table 13: Thermoluminescent Dosimeters - Special Interest Areas Analysis: Gamma Dose Units: mrem/Std. Qtr.

st 1 Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2022 2022 2022 2022 2022 E-15 9.9 9.7 10.0 12.2 10.5 F-9 10.8 10.3 10.9 12.4 11.1 G-8(1) 11.1 11.0 11.2 12.9 11.6 J-15 10.2 9.7 10.2 11.7 10.5 (1)

Special interest station with highest annual mean.

Table 14: Thermoluminescent Dosimeters - Control Analysis: Gamma Dose Units: mrem/Std. Qtr.

1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2022 2022 2022 2022 2022 E-26 9.1 9.1 9.1 10.7 9.5

Plant: Waterford 3 Year: 2022 Page 36 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 6 of 14 Monitoring Results Tables Table 15: Surface Water - Gamma Analysis: Gamma Isotopic Units: pCi/L Location Start Date End Date Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Zr-95 Cs-134 Cs-137 Ba-140 La-140 REQUIRED LLD 15 15 30 15 30 15 15 15 15 18 15 15 SWK-1 12/21/2021 01/18/2022 < 2.06 < 1.95 < 3.93 < 2.02 < 3.93 < 2.06 < 2.13 < 3.02 < 2.13 < 2.07 < 6.85 < 2.43 (Indicator)

SWK-1 01/18/2022 02/15/2022 < 4.46 < 4.38 < 6.61 < 2.85 < 8.00 < 3.34 < 4.78 < 7.02 < 4.78 < 4.34 < 12.9 < 4.82 (Indicator)

SWK-1 02/15/2022 03/15/2022 < 1.61 < 1.72 < 3.55 < 1.73 < 3.24 < 1.61 < 2.46 < 2.87 < 1.83 < 1.58 < 7.40 < 2.69 (Indicator)

SWK-1 03/15/2022 04/12/2022 < 2.90 < 3.94 < 7.13 < 3.66 < 5.58 < 4.01 < 4.65 < 6.15 < 4.17 < 4.11 < 14.5 < 5.77 (Indicator)

SWK-1 04/12/2022 05/10/2022 < 4.40 < 3.55 < 7.76 < 3.89 < 6.96 < 3.56 < 4.45 < 6.69 < 4.01 < 3.00 < 13.6 < 4.10 (Indicator)

SWK-1 05/10/2022 06/07/2022 < 1.50 < 1.64 < 3.31 < 1.44 < 3.04 < 1.52 < 2.45 < 2.69 < 1.61 < 1.54 < 7.07 < 2.52 (Indicator)

SWK-1 06/07/2022 07/05/2022 < 1.95 < 1.99 < 4.19 < 2.07 < 4.49 < 2.05 < 2.52 < 3.42 < 2.24 < 2.09 < 8.06 < 2.98 (Indicator)

SWK-1 07/05/2022 08/02/2022 < 1.90 < 1.82 < 3.83 < 2.23 < 3.54 < 1.83 < 2.53 < 3.38 < 2.23 < 2.16 < 7.64 < 2.40 (Indicator)

SWK-1 08/02/2022 08/30/2022 < 2.40 < 2.48 < 4.77 < 3.02 < 4.72 < 2.27 < 2.86 < 3.79 < 2.89 < 2.38 < 10.2 < 2.98 (Indicator)

SWK-1 08/30/2022 09/27/2022 < 2.45 < 2.15 < 4.57 < 2.47 < 4.78 < 2.03 < 2.60 < 4.04 < 2.42 < 2.57 < 8.11 < 2.92 (Indicator)

SWK-1 09/27/2022 10/24/2022 < 1.65 < 1.58 < 2.79 < 1.73 < 2.99 < 1.49 < 1.94 < 2.62 < 1.76 < 1.65 < 5.86 < 2.09 (Indicator)

SWK-1 10/24/2022 11/22/2022 < 1.65 < 1.58 < 3.18 < 1.96 < 3.31 < 1.62 < 1.67 < 2.73 < 1.83 < 1.68 < 5.47 < 2.16 (Indicator)

SWK-1 11/22/2022 12/19/2022 < 2.16 < 1.99 < 3.97 < 2.18 < 4.31 < 2.08 < 2.55 < 3.56 < 2.20 < 2.17 < 7.96 < 2.53 (Indicator)

Plant: Waterford 3 Year: 2022 Page 37 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 7 of 14 Monitoring Results Tables Table 16: Surface Water - Tritium Analysis: H-3 Units: pCi/L Location Start Date End Date H-3 REQUIRED LLD 3000 SWK-1 (Indicator) 11/23/2021 02/15/2022 < 563 SWK-1 (Indicator) 02/15/2022 05/10/2022 < 535 SWK-1 (Indicator) 05/10/2022 08/02/2022 < 473 SWK-1 (Indicator) 08/02/2022 10/24/2022 < 498 SWK-1 (Indicator) 10/24/2022 01/17/2023 < 568

Plant: Waterford 3 Year: 2022 Page 38 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 8 of 14 Monitoring Results Tables Table 17: Drinking/Surface Water - Gamma and Gross Beta Analysis: Gamma Isotopic, Gross Beta Units: pCi/L Collection Gross Location Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Date Beta REQUIRED LLD 4 15 15 30 15 30 15 15 15 18 15 15 DWF/SWF-2(1) 02/15/2022 4.32 < 2.76 < 2.69 < 5.42 < 3.55 < 6.17 < 3.31 < 5.14 < 3.50 < 3.26 < 12.97 < 4.28 (Indicator)

DWE/SWE-5 02/15/2022 3.50 < 2.87 < 2.91 < 5.58 < 2.88 < 5.77 < 2.49 < 4.04 < 2.84 < 2.76 < 13.77 < 4.39 (Indicator)

DWP/SWP-7 02/15/2022 4.03 < 2.14 < 2.20 < 4.36 < 2.28 < 4.02 < 2.28 < 3.72 < 2.50 < 2.13 < 10.32 < 3.44 (Control)

DWF/SWF-2(1) 05/10/2022 6.22 < 2.03 < 2.12 < 4.38 < 2.24 < 4.00 < 2.19 < 3.70 < 2.43 < 2.01 < 9.75 < 3.33 (Indicator)

DWE/SWE-5 05/10/2022 5.28 < 1.78 < 1.72 < 3.87 < 1.81 < 3.57 < 1.79 < 3.26 < 1.95 < 1.91 < 8.24 < 2.70 (Indicator)

DWP/SWP-7 05/10/2022 5.79 < 1.95 < 2.01 < 3.73 < 1.98 < 4.01 < 2.07 < 3.40 < 1.98 < 2.00 < 9.66 < 3.34 (Control)

DWF/SWF-2(1) 08/02/2022 3.10 < 1.79 < 1.77 < 4.02 < 2.07 < 3.66 < 1.83 < 3.24 < 2.07 < 1.82 < 8.93 < 3.05 (Indicator)

DWE/SWE-5 08/02/2022 3.22 < 1.77 < 1.95 < 3.91 < 1.84 < 3.49 < 1.72 < 3.12 < 1.99 < 1.91 < 8.31 < 3.16 (Indicator)

DWP/SWP-7 08/02/2022 4.08 < 1.79 < 2.04 < 4.44 < 1.93 < 3.69 < 1.81 < 3.37 < 2.15 < 1.75 < 8.69 < 3.24 (Control)

DWF/SWF-2(1) 10/24/2022 4.96 < 1.71 < 1.59 < 3.29 < 1.84 < 3.46 < 1.83 < 2.66 < 1.79 < 1.67 < 6.98 < 2.25 (Indicator)

DWE/SWE-5 10/24/2022 4.18 < 1.53 < 1.65 < 3.23 < 2.11 < 3.43 < 1.64 < 2.77 < 1.85 < 1.62 < 7.20 < 2.17 (Indicator)

DWP/SWP-7 10/24/2022 3.19 < 1.66 < 1.74 < 3.56 < 1.86 < 3.64 < 1.87 < 2.94 < 1.85 < 1.93 < 7.16 < 2.49 (Control)

DWF/SWF-2(1) 01/17/2023 3.75 < 1.75 < 1.83 < 4.02 < 2.16 < 3.90 < 1.86 < 3.42 < 2.07 < 1.90 < 8.56 < 2.55 (Indicator)

DWE/SWE-5 01/17/2023 3.30 < 1.65 < 1.62 < 3.33 < 1.98 < 3.30 < 1.73 < 2.94 < 1.87 < 1.77 < 8.09 < 2.75 (Indicator)

DWP/SWP-7 01/17/2023 4.26 < 1.92 < 1.74 < 3.91 < 1.97 < 3.54 < 1.98 < 3.55 < 1.82 < 1.92 < 8.97 < 3.11 (Control)

(1)

Station with highest annual Gr-B mean.

Plant: Waterford 3 Year: 2022 Page 39 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 9 of 14 Monitoring Results Tables Table 18: Drinking/Surface Water- Iodine-131 Analysis: Iodine-131 Units: pCi/L Location Start Date End Date I-131 REQUIRED LLD 1.0 DWF/SWF-2 (Indicator) 12/21/2021 01/18/2022 < 0.873 DWE/SWE-5 (Indicator) 12/21/2021 01/18/2022 < 0.801 DWP/SWP-7 (Control) 12/21/2021 01/18/2022 < 0.750 DWF/SWF-2 (Indicator) 01/18/2022 02/15/2022 < 0.853 DWE/SWE-5 (Indicator) 01/18/2022 02/15/2022 < 0.867 DWP/SWP-7 (Control) 01/18/2022 02/15/2022 < 0.862 DWF/SWF-2 (Indicator) 02/15/2022 03/15/2022 < 0.451 DWE/SWE-5 (Indicator) 02/15/2022 03/15/2022 < 0.478 DWP/SWP-7 (Control) 02/15/2022 03/15/2022 < 0.801 DWF/SWF-2 (Indicator) 03/15/2022 04/12/2022 < 0.870 DWE/SWE-5 (Indicator) 03/15/2022 04/12/2022 < 0.764 DWP/SWP-7 (Control) 03/15/2022 04/12/2022 < 0.863 DWF/SWF-2 (Indicator) 04/12/2022 05/10/2022 < 0.545 DWE/SWE-5 (Indicator) 04/12/2022 05/10/2022 < 0.532 DWP/SWP-7 (Control) 04/12/2022 05/10/2022 < 0.568 DWF/SWF-2 (Indicator) 05/10/2022 06/07/2022 < 0.697 DWE/SWE-5 (Indicator) 05/10/2022 06/07/2022 < 0.866 DWP/SWP-7 (Control) 05/10/2022 06/07/2022 < 0.685 DWF/SWF-2 (Indicator) 06/07/2022 07/05/2022 < 0.698 DWE/SWE-5 (Indicator) 06/07/2022 07/05/2022 < 0.676 DWP/SWP-7 (Control) 06/07/2022 07/05/2022 < 0.749 DWF/SWF-2 (Indicator) 07/05/2022 08/02/2022 < 0.798 DWE/SWE-5 (Indicator) 07/05/2022 08/02/2022 < 0.693 DWP/SWP-7 (Control) 07/05/2022 08/02/2022 < 0.825 DWF/SWF-2 (Indicator) 08/02/2022 08/30/2022 < 0.540 DWE/SWE-5 (Indicator) 08/02/2022 08/30/2022 < 0.877 DWP/SWP-7 (Control) 08/02/2022 08/30/2022 < 0.674 DWF/SWF-2 (Indicator) 08/30/2022 09/27/2022 < 0.839 DWE/SWE-5 (Indicator) 08/30/2022 09/27/2022 < 0.832 DWP/SWP-7 (Control) 08/30/2022 09/27/2022 < 0.784 DWF/SWF-2 (Indicator) 09/27/2022 10/24/2022 < 0.951 DWE/SWE-5 (Indicator) 09/27/2022 10/24/2022 < 0.886 DWP/SWP-7 (Control) 09/27/2022 10/24/2022 < 0.906 DWF/SWF-2 (Indicator) 10/24/2022 11/22/2022 < 0.891 DWE/SWE-5 (Indicator) 10/24/2022 11/22/2022 < 0.834 DWP/SWP-7 (Control) 10/24/2022 11/22/2022 < 0.848 DWF/SWF-2 (Indicator) 11/22/2022 12/19/2022 < 0.814 DWE/SWE-5 (Indicator) 11/22/2022 12/19/2022 < 0.889 DWP/SWP-7 (Control) 11/22/2022 12/19/2022 < 0.890 DWF/SWF-2 (Indicator) 12/19/2022 01/17/2023 < 0.761 DWE/SWE-5 (Indicator) 12/19/2022 01/17/2023 < 0.867 DWP/SWP-7 (Control) 12/19/2022 01/17/2023 < 0.802 DWP/SWP-7 DUP (Control) 12/19/2022 01/17/2023 < 0.870

Plant: Waterford 3 Year: 2022 Page 40 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 10 of 14 Monitoring Results Tables Table 19: Drinking/Surface Water - Tritium Analysis: H-3 Units: pCi/L Location Start Date End Date H-3 REQUIRED LLD 2000 DWF/SWF-2 (Indicator) 11/23/2021 02/15/2022 < 592 DWE/SWE-5 (Indicator) 11/23/2021 02/15/2022 < 589 DWP/SWP-7 (Control) 11/23/2021 02/15/2022 < 552 DWF/SWF-2 (Indicator) 02/15/2022 05/10/2022 < 595 DWE/SWE-5 (Indicator) 02/15/2022 05/10/2022 < 544 DWP/SWP-7 (Control) 02/15/2022 05/10/2022 < 494 DWF/SWF-2 (Indicator) 05/10/2022 08/02/2022 < 523 DWE/SWE-5 (Indicator) 05/10/2022 08/02/2022 < 514 DWP/SWP-7 (Control) 05/10/2022 08/02/2022 < 471 DWF/SWF-2 (Indicator) 08/02/2022 10/24/2022 < 483 DWE/SWE-5 (Indicator) 08/02/2022 10/24/2022 < 473 DWP/SWP-7 (Control) 08/02/2022 10/24/2022 < 490 DWF/SWF-2 (Indicator) 10/24/2022 01/17/2023 < 564 DWE/SWE-5 (Indicator) 10/24/2022 01/17/2023 < 576 DWP/SWP-7 (Control) 10/24/2022 01/17/2023 < 589

Plant: Waterford 3 Year: 2022 Page 41 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 11 of 14 Monitoring Results Tables Table 20: Sediment - Gamma Analysis: Gamma Isotopic Units: pCi/kg (dry)

Location Collection Date Cs-134 Cs-137 REQUIRED LLD 150 180 SHWK-1 (Indicator) 09/07/2022 < 106.4 < 106.9 SHWE-3 (Indicator) 09/07/2022 < 103.9 < 82.82 SHWQ-6 (Control) 09/07/2022 < 73.11 < 53.68

Plant: Waterford 3 Year: 2022 Page 42 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 12 of 14 Monitoring Results Tables Table 21: Fish - Gamma Analysis: Gamma Isotopic Units: pCi/kg (wet)

Collection Location Species Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Date REQUIRED LLD 130 130 260 130 260 130 150 FH-1 12/16/2022 CATFISH < 42.38 < 32.61 < 70.3 < 36.31 < 68.0 < 37.85 < 33.53 (Control)

FH-2 12/12/2022 CATFISH < 66.84 < 59.62 < 119.3 < 38.73 < 90.4 < 36.61 < 50.49 (Indicator)

FH-3 11/08/2022 MULLET < 54.15 < 77.80 < 161.0 < 56.28 < 133.5 < 46.78 < 44.34 (Indicator)

FH-1 12/16/2022 BUFFALO < 42.56 < 38.45 < 92.8 < 53.77 < 106.6 < 51.12 < 57.54 (Control)

FH-2 12/12/2022 BUFFALO < 57.09 < 54.19 < 100.3 < 68.57 < 110.4 < 51.66 < 58.50 (Indicator)

FH-3 12/09/2022 BUFFALO < 69.67 < 65.76 < 140.0 < 48.93 < 71.8 < 74.61 < 63.53 (Indicator)

FH-1 12/16/2022 MULLET < 41.50 < 34.20 < 62.01 < 32.63 < 89.6 < 44.00 < 34.04 (Control)

FH-2 12/12/2022 MULLET < 53.52 < 61.78 < 119.9 < 29.88 < 128.1 < 59.93 < 46.46 (Indicator)

FH-3 11/08/2022 CARP < 60.85 < 70.85 < 189.9 < 54.28 < 145.0 < 55.88 < 49.90 (Indicator)

FH-1 12/16/2022 CARP < 39.01 < 32.52 < 70.0 < 41.88 < 82.1 < 41.66 < 29.36 (Control)

FH-2 12/12/2022 CARP < 66.97 < 70.49 < 178.4 < 72.01 < 124.7 < 79.78 < 68.74 (Indicator)

FH-3 12/09/2022 CATFISH < 70.80 < 66.49 < 137.6 < 69.73 < 162.5 < 79.14 < 75.17 (Indicator)

Plant: Waterford 3 Year: 2022 Page 43 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 13 of 14 Monitoring Results Tables Table 22: Broad Leaf Vegatation - Gamma Analysis: Gamma Isotopic Units: pCi/kg (wet)

Location Collection Date I-131 Cs-134 Cs-137 REQUIRED LLD 60 60 80 BLQ-1 (Indicator) 03/08/2022 < 19.58 < 19.18 < 15.22 BLB-1 (Indicator) 03/08/2022 < 17.09 < 18.31 < 20.88 BLE-20 (Control) 03/08/2022 < 12.41 < 15.57 < 15.99 BLQ-1 (Indicator) 06/08/2022 < 43.13 < 30.28 < 35.38 BLB-1 (Indicator) 06/08/2022 < 36.66 < 25.29 < 25.12 BLE-20 (Control) 06/08/2022 < 43.65 < 37.75 < 36.76 BLQ-1 (Indicator) 09/07/2022 < 57.42 < 34.33 < 37.26 BLB-1 (Indicator) 09/07/2022 < 33.60 < 22.92 < 26.70 BLE-20 (Control) 09/07/2022 < 57.06 < 36.06 < 41.08 BLQ-1 (Indicator) 12/05/2022 < 48.75 < 43.17 < 48.10 BLB-1 (Indicator) 12/05/2022 < 40.79 < 37.93 < 36.31 BLE-20 (Control) 12/05/2022 < 38.70 < 30.02 < 31.30

Plant: Waterford 3 Year: 2022 Page 44 of 52 Annual Radiological Environmental Operating Report Attachment 2 Page 14 of 14 Monitoring Results Tables Table 23: Milk - Gamma and Iodine-131 Analysis: Gamma Isotopic, Iodine-131 Units: pCi/L Collection Location I-131 Cs-134 Cs-137 Ba-140 La-140 Date REQUIRED LLD 1 15 18 15 15 MKE-3 03/01/2022 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 03/01/2022 (2) (2) (2) (2) (2)

(Control)

MKE-3 06/01/2022 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 06/01/2022 (2) (2) (2) (2) (2)

(Control)

MKE-3 09/01/2022 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 09/01/2022 (2) (2) (2) (2) (2)

(Control)

MKE-3 12/01/2022 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 12/01/2022 (2) (2) (2) (2) (2)

(Control)

(1)

See Attachment 1, Table 7, Samples Deviations Table, Comment 1 (2)

See Attachment 1, Table 7, Samples Deviations Table, Comment 2

Plant: Waterford 3 Year: 2022 Page 45 of 52 Annual Radiological Environmental Operating Report Attachment 3 Page 1 of 8 Interlaboratory Comparison Program Results 1.0 Summary of Teledyne Brown Engineering Quality Assurance For the Teledyne Brown Engineering (TBE) laboratory, 146 out of 154 analyses performed met the specified acceptance criteria. Seven analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program. NOTE: One analysis (soil for Tc-99) that did not meet acceptance criteria was performed for TBE information and is not on the list of required ICP analyses. A summary is found below:

Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

1. The Analytics March 2022 AP Ce-141 result was evaluated as Not Acceptable. The reported value for Ce-141 was 60.9 pCi and the known result was 42.0 pCi/L (1.45 ratio of reported result vs. known; TBEs internal acceptance range is 0.70 - 1.30). This sample was used as the workgroup duplicate with a result of 45.7 (109% of known) and was also counted on a different detector with a result of 50.9 (121% of known). This was TBEs first failure for AP Ce-141. (NCR 22-04)

2. The MAPEP February 2022 Urine U-234 & U-238 results were evaluated as Not Acceptable. TBEs reported values of 0.142 and 0.0254 were above the known upper ranges of 0.0096 and 0.0134 respectively for U-234 and U-238. These spiked values were below TBEs typical MDC for urine client samples. The samples were re-prepped using a larger sample aliquot and counted for 60 hours6.944444e-4 days 0.0167 hours 9.920635e-5 weeks 2.283e-5 months as opposed to 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months . The recount results were 0.00732 for U-234 and 0.0119 for U-238 (both within acceptable range). MAPEP urine samples will be flagged to use a larger sample aliquot and counting time than typical client samples. MAPEP did not include any urine cross-check samples in August. (NCR 22-05)

3. The ERA MRAD September 2022 AP Pu-238 was evaluated as Not Acceptable. The reported value was 38.8 pCi and the known result was 29.9 (acceptance range 22.6 -

36.7). The AP filter was cut in half prior to digestion (shared with Fe-55) but should have been complete digested together and aliquoted afterwards like typical client samples.

This is the first failure for AP Pu-238. (NCR 22-19)

4. The ERA October 2022 water Uranium result was evaluated as Not Acceptable. The reported value was 10.54 pCi/L and the known was 8.53 (acceptance range 6.60 - 9.88) or 124% of the known (acceptable for TBE QC). The 2-sigma error was 3.2, placing the reported result well within the acceptable range. This sample was used as the workgroup duplicate with a result of 8.2 +/- 2.9 pCi/L (also within the acceptable range). All other QA was reviewed with no anomalies. (NCR 22-20)

5. The Analytics AP Co-60 result was evaluated as Not Acceptable. The reported value was 207 pCi and the known was 147 (141% of the known). TBEs internal QC acceptance is 70 - 130%. All QA was reviewed with no anomalies. This sample was used as the workgroup duplicate and counted on a different detector with a result of 167 pCi (114% of the known). This is the first failure for AP Co average result ratio compared to the known is 109%. (NCR 22-21)

Plant: Waterford 3 Year: 2022 Page 46 of 52 Annual Radiological Environmental Operating Report Page 2 of 8 Interlaboratory Comparison Program Results

6. The MAPEP August 2022 water Tc-99 result was evaluated as Not Acceptable.

The reported value was 1.86 +/- 0.414 Bq/L for this false positive test. The evaluation of the submitted result to the 3 times the uncertainty indicated a slight positive. This sample was used as the workgroup duplicate with a result of 0.88

+/- 0.374 Bq/L. All QC was reviewed, and no anomalies found. This is the first unacceptable since the resumption of reporting water Tc-99 for the 3rd quarter of 2020. TBE to known ratios have ranged from 94-109% during this time. (NCR 22-22)

The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data.

Plant: Waterford 3 Year: 2022 Page 47 of 52 Annual Radiological Environmental Operating Report Attachment 3 Page 3 of 8 Table 24: Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value March 2022 E13706 Milk Sr-89 pCi/L 80.3 96.8 0.83 A Sr-90 pCi/L 12.7 12.6 1.01 A E13707 Milk Ce-141 pCi/L 62.3 65 0.96 A Co-58 pCi/L 158 164 0.96 A Co-60 pCi/L 286 302 0.95 A Cr-51 pCi/L 314 339 0.93 A Cs-134 pCi/L 155 182 0.85 A Cs-137 pCi/L 210 223 0.94 A Fe-59 pCi/L 211 185 1.14 A I-131 pCi/L 88.0 96.7 0.91 A Mn-54 pCi/L 169 164 1.03 A Zn-65 pCi/L 238 246 0.97 A E13708 Charcoal I-131 pCi 79.9 87.1 0.92 A E13709 AP Ce-141 pCi 60.9 42.0 1.45 N(1)

Co-58 pCi 118 107 1.11 A Co-60 pCi 218 196 1.11 A Cr-51 pCi 251 221 1.14 A Cs-134 pCi 129 118 1.09 A Cs-137 pCi 156 145.0 1.07 A Fe-59 pCi 124 120.0 1.03 A Mn-54 pCi 120 107 1.12 A Zn-65 pCi 162 160 1.01 A E13710 Soil Ce-141 pCi/g 0.123 0.103 1.19 A Co-58 pCi/g 0.254 0.263 0.97 A Co-60 pCi/g 0.493 0.483 1.02 A Cr-51 pCi/g 0.603 0.543 1.11 A Cs-134 pCi/g 0.268 0.292 0.92 A Cs-137 pCi/g 0.399 0.431 0.93 A Fe-59 pCi/g 0.320 0.296 1.08 A Mn-54 pCi/g 0.263 0.263 1.00 A Zn-65 pCi/g 0.407 0.395 1.03 A E13711 AP Sr-89 pCi 83.2 97.4 0.85 A Sr-90 pCi 12.7 12.7 1.00 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (Page 1 of 4)

Plant: Waterford 3 Year: 2022 Page 48 of 52 Annual Radiological Environmental Operating Report Attachment 3 Page 4 of 8 Table 24: Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value September 2022 E13712 Milk Sr-89 pCi/L 71.1 89.1 0.80 A Sr-90 pCi/L 12.0 13.6 0.88 A E13713 Milk Ce-141 pCi/L 148 161 0.92 A Co-58 pCi/L 178 189 0.94 A Co-60 pCi/L 229 260 0.88 A Cr-51 pCi/L 486 456 1.07 A Cs-134 pCi/L 220 252 0.87 A Cs-137 pCi/L 203 222 0.92 A Fe-59 pCi/L 174 173 1.01 A I-131 pCi/L 75.9 94.2 0.81 A Mn-54 pCi/L 269 282 0.95 A Zn-65 pCi/L 364 373 0.97 A E13714 Charcoal I-131 pCi 81.4 83.6 0.97 A E13715 AP Ce-141 pCi 102 91 1.12 A Co-58 pCi 118 107 1.11 A Co-60 pCi 207 147 1.41 N(2)

Cr-51 pCi 310 257 1.21 W Cs-134 pCi 148 142 1.04 A Cs-137 pCi 137 125 1.10 A Fe-59 pCi 115 98 1.18 A Mn-54 pCi 168 159 1.05 A Zn-65 pCi 240 211 1.14 A E13716 Soil Ce-141 pCi/g 0.288 0.284 1.01 A Co-58 pCi/g 0.320 0.334 0.96 A Co-60 pCi/g 0.445 0.459 0.97 A Cr-51 pCi/g 0.883 0.805 1.10 A Cs-134 pCi/g 0.410 0.446 0.92 A Cs-137 pCi/g 0.447 0.465 0.96 A Fe-59 pCi/g 0.314 0.305 1.03 A Mn-54 pCi/g 0.489 0.499 0.98 A Zn-65 pCi/g 0.666 0.660 1.01 A E13717 AP Sr-89 pCi 87.5 98.3 0.89 A Sr-90 pCi 12.6 15.0 0.84 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) See NCR 22-04 (2) See NCR 22-21 (Page 2 of 4)

Plant: Waterford 3 Year: 2022 Page 49 of 52 Annual Radiological Environmental Operating Report Attachment 3 Page 5 of 8 Table 25: DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Range Value February 2022 22-GrF46 AP Gross Alpha Bq/sample 0.402 1.20 0.36 - 2.04 A Gross Beta Bq/sample 0.669 0.68 0.341 - 1.022 A 22-MaS46 Soil Ni-63 Bq/kg 645 780 546 - 1014 A Tc-99 Bq/kg 526 778 545 - 1011 N(3) 22-MaSU46 Urine Cs-134 Bq/L 1.67 1.77 1.24 - 2.30 A Cs-137 Bq/L 1.50 1.56 1.09 - 2.03 A Co-57 Bq/L 4.93 5.39 3.77 - 7.01 A Co-60 Bq/L 2.13 2.06 1.44 - 2.68 A Mn-54 Bq/L 4.83 5.08 3.56 - 6.60 A U-234 Bq/L 0.142 0.0074 0.0052 - 0.0096 N(4)

U-238 Bq/L 0.0254 0.0103 0.0072 - 0.0134 N(4)

Zn-65 Bq/L 4.71 4.48 3.14 - 5.82 A 22-MaW46 Water Ni-63 Bq/L 28.6 34.0 23.8 - 44.2 A Tc-99 Bq/L 8.59 7.90 5.5 - 10.3 A 22-RdV46 Vegetation Cs-134 Bq/sample 6.61 7.61 5.33 - 9.89 A Cs-137 Bq/sample 1.50 1.52 1.06 - 1.98 A Co-57 Bq/sample 5.11 5.09 3.56 - 6.62 A Co-60 Bq/sample 0.0162 (1) A Mn-54 Bq/sample 2.42 2.59 1.81 - 3.37 A Sr-90 Bq/sample 0.684 0.789 0.552 - 1.026 A Zn-65 Bq/sample 1.44 1.47 1.03 - 1.91 A August 2022 22-MaS47 Soil Ni-63 Bq/kg 14.6 (1) A Tc-99 Bq/kg 994 1000 700 - 1300 A 22-MaW47 Water Ni-63 Bq/L 24.4 32.9 23.0 - 42.8 A Tc-99 Bq/L 1.9 (1) N(5) 25-RdV47 Vegetation Cs-134 Bq/sample 0.032 (1) A Cs-137 Bq/sample 0.891 1.08 0.758 - 1.408 A Co-57 Bq/sample 0.006 (1) A Co-60 Bq/sample 4.04 4.62 3.23 - 6.01 A Mn-54 Bq/sample 2.01 2.43 1.70 - 3.16 A Sr-90 Bq/sample 1.25 1.60 1.12 - 2.08 W Zn-65 Bq/sample 6.16 7.49 5.24 - 9.74 A (a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) False positive test (2) Sensitivity evaluation (3) Tc-99 soil cross-checks done for TBE information only - not required (4) See NCR 22-05 (5) See NCR 22-22 (Page 3 of 4)

Plant: Waterford 3 Year: 2022 Page 50 of 52 Annual Radiological Environmental Operating Report Attachment 3 Page 6 of 8 Table 26: ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification TBE Reported Known Acceptance Month/Year Matrix Nuclide Units (a) Evaluation (b)

Number Value Value Limits March 2022 MRAD-36 Water Am-241 pCi/L 68.3 74.6 51.2 - 95.4 A Fe-55 pCi/L 797 1140 670 - 1660 A Pu-238 pCi/L 146 147 88.4 - 190 A Pu-239 pCi/L 69.9 71.9 44.5 - 88.6 A Soil Sr-90 pCi/kg 8050 6720 2090 - 10500 A AP Fe-55 pCi/filter 148 127 46.4 - 203 A Pu-238 pCi/filter 29.9 29.6 22.3 - 36.4 A Pu-239 pCi/filter 51.6 49.7 37.2 - 60.0 A U-234 pCi/filter 59.9 67.3 49.9 - 78.9 A U-238 pCi/filter 59.0 66.7 50.4 - 79.6 A GR-A pCi/filter 95.6 94.2 49.2 - 155 A GR-B pCi/filter 71.2 66.8 40.5 - 101 A April 2022 RAD-129 Water Ba-133 pCi/L 61.7 62.9 52.3 - 69.2 A Cs-134 pCi/L 80.9 81.6 68.8 - 89.8 A Cs-137 pCi/L 37.4 36.6 32.1 - 43.3 A Co-60 pCi/L 103 97.4 87.7 - 109 A Zn-65 pCi/L 318 302 272 - 353 A GR-A pCi/L 26.9 20.8 10.4 - 28.3 A GR-B pCi/L 49.7 51.0 34.7 - 58.1 A U-Nat pCi/L 56.3 68.9 56.3 - 75.8 A H-3 pCi/L 17,000 18,100 15,800 - 19,000 A Sr-89 pCi/L 65.3 67.9 55.3 - 76.1 A Sr-90 pCi/L 42.1 42.7 31.5 - 49.0 A I-131 pCi/L 25.7 26.2 21.8 - 30.9 A September 2022 MRAD-37 Water Am-241 pCi/L 111 96.2 66.0 - 123 A Fe-55 pCi/L 850 926 544 - 1350 A Pu-238 pCi/L 62.1 52.6 31.6 - 68.2 A Pu-239 pCi/L 139.5 117 72.5 - 144 A Soil Sr-90 pCi/kg 3350 6270 1950 - 9770 A U-234 pCi/kg 1684 3350 1570 - 4390 A U-238 pCi/kg 1658 3320 1820 - 4460 N(2)

AP Fe-55 pCi/filter 71.9 122 44.5 - 195 A Pu-238 pCi/filter 38.8 29.9 22.6 - 36.7 N(1)

Pu-239 pCi/filter 14.5 13.0 9.73 - 15.7 A U-234 pCi/filter 78.0 71.5 53.0 - 83.8 A U-238 pCi/filter 79.7 70.9 53.5 - 84.6 A GR-A pCi/filter 62.8 55.5 29.0 - 91.4 A GR-B pCi/filter 70.9 64.8 39.3 - 97.9 A October 2022 RAD-131 Water Ba-133 pCi/L 76.2 79.4 66.6 - 87.3 A Cs-134 pCi/L 28.0 30.5 23.9 - 33.6 A Cs-137 pCi/L 202 212 191 - 235 A Co-60 pCi/L 52.4 51.4 46.3 - 59.1 A Zn-65 pCi/L 216 216 194 - 253 A GR-A pCi/L 19.7 16.9 8.28 - 23.7 A GR-B pCi/L 49.8 53.0 36.1 - 60.0 A U-Nat pCi/L 10.54 8.53 6.60 - 9.88 N(3)

H-3 pCi/L 13,900 15,100 13,200 - 16,600 A Sr-89 pCi/L 59.7 64.5 52.3 - 72.5 A Sr-90 pCi/L 32.9 37.3 27.4 - 43.0 A I-131 pCi/L 26.9 24.4 20.2 - 28.9 A (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 22-19 (2) U soil cross-checks done for TBE information only - not required (3) See NCR 22-20 (Page 4 of 4)

Plant: Waterford 3 Year: 2022 Page 51 of 52 Annual Radiological Environmental Operating Report Attachment 3 Page 7 of 8 Interlaboratory Comparison Program Results 2.0 Environmental TLD Quality Assurance Environmental dosimetry services for the reporting period of January - December, 2022 were provided by the Environmental Dosimetry Company (EDC), Sterling, Massachusetts. The TLD systems at the Environmental Dosimetry Company (EDC) are calibrated and operated to ensure consistent and accurate evaluation of TLDs. The quality of the dosimetric results reported to EDC clients is ensured by in house performance testing and independent performance testing by EDC clients.

The purpose of the dosimetry quality assurance program is to provide performance documentation of the routine processing of EDC dosimeters. Performance testing provides a statistical measure of the bias and precision of dosimetry processing against a reliable standard, which in turn points out any trends or performance changes. Dosimetry quality control tests are performed on EDC Panasonic 814 Environmental dosimeters. These tests include: (1) the in house testing program conducted by the EDC QA Officer and (2) independent test perform by EDC clients.

Excluded from this report are instrumentation checks. Although instrumentation checks represent an important aspect of the quality assurance program, they are not included as process checks in this report. Instrumentation checks represent between 5-10% of the TLDs processed.

Table 27 provides a summary of individual dosimeter results evaluated against the EDC internal acceptance criteria for high-energy photons (Cs-137) only. The internal acceptance (tolerance) criteria for the Panasonic Environmental dosimeters are: +/- 15% for bias and +/- 12.8% for precision. During this period, 100% (72/72) of the individual dosimeters, evaluated against these criteria met the tolerance limits for accuracy and 100% (72/72) met the criterion for precision.

Table 28 provides the Bias + Standard deviation results for each group (N=6) of dosimeters evaluated against the internal tolerance criteria. Overall, 100% (12/12) of the dosimeter sets evaluated against the internal tolerance performance criteria met these criteria.

Table 29 presents the independent blind spike results for irradiated dosimeters provided by client utilities during this annual period. All results passed the performance acceptance criterion.

Table 27 PERCENTAGE OF INDIVIDUAL DOSIMETERS THAT PASSED EDC INTERNAL CRITERIA JANUARY - DECEMBER 2022 (1), (2)

Number % Passed Precision Dosimeter Type % Passed Bias Criteria Tested Criteria Panasonic Environmental 72 100 100 (1)This table summarizes results of tests conducted by EDC.

(2)Environmental dosimeter results are free in air.

Plant: Waterford 3 Year: 2022 Page 52 of 52 Annual Radiological Environmental Operating Report Page 8 of 8 Interlaboratory Comparison Program Results Table 28 MEAN DOSIMETER ANALYSES (N=6)

JANUARY - DECEMBER 2022 (1), (2)

Standard Tolerance Process Date Mean Bias % Limit +/-15%

Deviation %

4/25/2022 43 1.2 1.8 4/27/2022 62 6.2 1.0 5/05/2022 99 2.3 0.7 7/26/2022 34 -2.6 1.2 7/27/2022 81 0.6 1.7 8/07/2022 107 -3.5 0.7 10/27/2022 52 1.8 0.9 11/02/2022 76 2.0 0.9 11/07/2022 27 7.0 0.7 01/24/2023 38 1.5 1.7 01/26/2023 115 -0.3 2.0 02/14/2023 49 2.3 4.0 (1)This table summarizes results of tests conducted by EDC for TLDs issued in 2022.

(2)Environmental dosimeter results are free in air.

Table 29

SUMMARY

OF INDEPENDENT DOSIMETER TESTING JANUARY - DECEMBER 2022 (1), (2)

Issuance Standard Pass / Fail Client Mean Bias %

Period Deviation %

1st Qtr. 2022 Millstone -0.6 0.6 Pass 2nd Qtr.2022 Millstone -3.9 1.0 Pass 3rd Qtr. 2022 Millstone 0.1 0.5 Pass 4th Qtr.2022 Millstone -2.6 1.2 Pass 4th Qtr.2022 PSEG(PNNL) 48mR 1.1 1.5 Pass 4th Qtr.2022 PSEG(PNNL) 95mR 0.7 0.3 Pass 4th Qtr.2022 PSEG(PNNL) 143mR 2.3 0.8 Pass 4th Qtr.2022 PSEG(PNNL) 190mR 1.4 0.8 Pass 4th Qtr.2022 SONGS -5.6 1.1 Pass (1)Performance criteria are +/- 30%.

(2)Blind spike irradiations using Cs-137

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