RBG-48148, 2021 Annual Radiological Environmental Operating Report

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2021 Annual Radiological Environmental Operating Report
ML22117A082
Person / Time
Site: River Bend Entergy icon.png
Issue date: 04/27/2022
From: Schenk T
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RBG-48148
Download: ML22117A082 (46)
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Text

) entergy Tim Schenk Manager Regulatory Assurance 225-381-4177 RBG-48148 April 27, 2022 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

2021 Annual Radiological Environmental Operating Report River Bend Station - Unit 1 Renewed Operating License No. NPF-47 Docket No. 50-458 Enclosed is the River Bend Station (RBS) Annual Radiological Environmental Operating Report for the period of January 1, 2021, through December 31, 2021. This report is submitted in accordance with the RBS Technical Specifications, Section 5.6.2.

Should you have any questions regarding the enclosed, please contact Tim Schenk, at (225) 381-4177.

Sincerely, Tim Schenk TAS/twf

Enclosure:

2021 Annual Radiological Environmental Operating Report cc: NRC Senior Resident Inspector- River Bend Station, Unit 1

Enclosure 2021 Annual Radiological Environmental Operating Report

entergy Page 1 of 44 Plant: River Bend Station YEAR: 2021 Document Number: RBG-48148 Annual Radiological Environmental Operating Report

Plant: River Bend Station I Year: 2021 I Page 2 of 44 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 and Federal Program ...........................................................................6 1.4 Sample Deviations ................................................................................................................6 1.5 Program Modifications ...........................................................................................................6

2.0 INTRODUCTION

........................................................................................................................7 2.1 Radiological Environmental Monitoring Program ...................................................................7 2.2 Pathways Monitored ..............................................................................................................?

2.3 Land Use Census ..................................................................................................................7 3.0 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS ...................... 8 4.0 INTERPRETATION AND TRENDS OF RESUL TS .................................................................... 17 4.1 Air Particulate and Radioiodine Sample Results .................................................................. 17 4.2 Thermoluminescent Dosimetry (TLD) Sample Results ........................................................ 18 4.3 Waterborne Sample Results ................................................................................................18 4.3.1 Surface Water Results ............................................................................................................... 19 4.3.2 Groundwater Results ................................................................................................................. 19 4.3.3 Sediment Sample Results .......................................................................................................... 19 4.4 Ingestion Sample Results ......................................................... ,.......................................... 19 4.4.f Fish Sample Results ................................................................... ::~ ............................................. 19 4.4.2 Food Products Sample Results ................................................................................................... 19 4.4.3 Milk Sample Results .................................................................................................................... 20 4.5 Land Use Census Results ...................................................................................................20 4.6 lnterlaboratory Comparison Results ....................................................................................22 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

.......................... 22

Plant: River Bend Station I Year: 2021 I Page 3 of 44 Annual Radioloaical Environmental O0eratina Re0ort ATTACHMENTS - Sample Deviations ........................................................................................................26 - Monitoring Results Tables ............................................................................................28 - lnterlaboratory Comparison Program Results ...............................................................39 TABLES Table 1: Exposure Pathway - Airborne ........................................................................................8

  • Table 2: Exposure Pathway - Direct Radiation ............................................................................9 Table 3: Exposure Pathway-Waterborne .................................................................................12 Table 4: Exposure Pathway - Ingestion .....................................................................................13 Table 5: Land Use Census - 2020 Nearest Residence and Milk Animal Within 5 Miles ............. 21 Table 6: Radiological Environmental Monitoring Program Summary .........................................23 Table 7: Sample Deviations Table .............................................................................................26 Table 8: Air Particulate Data Table ............................................................................................28 Table 9: Radioiodine Cartridge Data Table ...............................................................................29 Table 1O: Thermoluminescent Dosimeters - Indicators ..............................................................30 Table 11: Thermoluminescent Dosimeters - Special Interest Areas .......................................... 31 Table 12: Thermoluminescent Dosimeters - Controls ...............*................................................31 Table 13: Surface Water - Gamma ............................................................................................32 Tab1Ed4: Surface Water - Tritium *******************************************~**********************************************33 Table 15: Groundwater-Gamma ..............................................._............................................... 34 Table 16: Groundwater - Tritum ................................................................................................35 Table 17: Sediment- Gamma ...................................................................................................36 Table 18: Fish - Gamma ............................................................................................................37 Table 19: Food Products - Gamma ...........................................................................................38 Table 20: Analytics Environmental Radioactivity Cross Check Program ................................... .41 Table 21-: DO E's Mixed Analyte Performance Evaluation Program (MAPEP) ........................... .43 Table 22: ERA Environmental Radioactivity Cross Check Program ......................................... .44

Plant: River Bend Station I Year: 2021 I Page4 of 44 Annual Radioloaical Environmental Operating Report FIGURES Figure 1: Exposure Pathway .....................................................................................................14 Figure 2: Sample Collection Sites - Near Field .......................................................................... 15 Figure 3: Sample Collection Sites - Far Field .............................................................................16 Figure 4: Gross Beta Indicator Results (2021 ) ...........................................................................17 Figure 5: TLD Indicator Results (2021) Versus Control Data (1986-2021 ) ................................. 18

Plant: River Bend Station I Year:2021 I Page 5 of 44 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 River Bend Station (RBS)

Radiological Environmental Monitoring Program (REMP) for the period January 1 through December 31, 2021. This report fulfills the requirements of RBS Technical Specification 5.6.2 of Appendix A to RBS License Number NPF-47.

All required lower limit of detection (LLD) capabilities were achieved in all sample analyses during 2021, as required by the RBS Technical Requirement Manual (TRM).

No measurable levels of radiation above baseline levels attributable to River Bend Station operation were detected in the vicinity of RBS. The 2021 Radiological Environmental Monitoring Program thus substantiated the adequacy of source control and effluent monitoring at River Bend Station with no observed impact of plant operations on the environment.

River Bend Station established the REMP prior to the station's becoming operational 1985 to provide data on background radiation and radioactivity normally present in the area. RBS has continued to monitor the environment by sampling air, water, sediment, fish and food products, as well as measuring direct radiation. RBS 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 20-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. RBS personnel compare indicator results with control and preoperational results to assess any impact RBS operation might have had on the surrounding environment.

In 2021, 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 RBS operation and effect on the area around the plant. The review of 20-2':1 data showed radioactivity levels in the environment were undetectable in many::fpcations and near background levels in significant pathways. * ""

1.2 Reporting Levels No samples equaled or exceeded reporting levels.

Plant: River Bend Station I Year: 2021 / Page 6 of 44 Annual Radiological Environmental Operating Report 1.3 Comparison to State and Federal Program RBS 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 Louisiana Department of Environmental Quality - Office of Environmental Compliance (LDEQ-OEC).

The NRC TLD Network Program was discontinued in 1998. Historically these results have compared to those from the RBS REMP. RBS 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 LDEQ-OEC and the RBS REMP entail similar radiological environmental monitoring program requirements. These programs include co-located 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 2021, environmental sampling was performed for seven media types addressed in the ODCM and for direct radiation. A total of 328 samples of the 328 scheduled were obtained. Of the scheduled samples, 100 percent 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

  • There were no program modifications during the reporting period.

Plant: River Bend Station I Year: 2021 I Page 7 of 44 Annual Radiological Environmental Operating Report

2.0 INTRODUCTION

2.1 Radiological Environmental Monitoring Program River Bend Station 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 River Bend Station.
  • Correlating levels of radiation and radioactivity in the environment with radioactive releases from station operation.

2.2 Pathways Monitored The airborne, direct radiation, waterborne and ingestion pathways are monitored as required by RBS TRM 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 2021 sampling results with Section 5.0 providing a summary of results for the monitored exposure pathways.

2.3 Land Use Census RBS conducts a land use census biennially, as required by 3.12.2 of the TRM. The purpose of this census is to identify changes in uses of land within five miles of RBS that would require modifications to the REMP and the Offsite Dose Calculation Manual (ODCM/TRM).The next scheduled land use census will be performed in 2022.

Section 4.5 on the report contains a narrative on the results of the 2020 land use census.

Plant: River Bend Station Year: 2021 Page 8 of 44 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 . AN1 (0.9 km W} - RBS site Hwy 2 samples from close to the 2 SITE 965; 0.4 km south of Activity Continuous sampler operation . Radioiodine Canisters 131 analysis every two BOUNDARY locations, in different sectors, of the highest calculated annual average ground level D/Q.

. Center.

AP1 (0.9 km WNW} - Behind River Bend Station Activity with sample collection every two weeks, or more frequently if required by dust loading. .

weeks.

Air Particulate - Gross beta radioactivity analysis Center. following filter change.

RADIOIODINE AND PARTICULATES . AQS2 (5.8 km NW} - St. Francis Substation on US Hwy. (Bus.)

Continuous sampler operation with sample collection every two

. Radioiodine Canisters 131 analysis every two weeks.

1 sample from the vicinity of a community having the highest calculated annual average ground level D/Q.

61 in St. Francisville. weeks, or more frequently if required by dust loading. . Air Particulate - Gross beta radioactivity analysis following filter change.

RADIOIODINE AND PARTICULATES . AGC (17.0 km SE)- Entergy Service Center compound in Continuous sampler operation with sample collection every two

. Radioiodine Canisters 131 analysis every two weeks.

1 sample from a control location, as for example 15 - 30 km distance and in the least prevalent wind direction.

Zachary. (Control) weeks, or more frequently if required by dust loading.

. Air Particulate - Gross beta radioactivity analysis following filter change.

Plant: River Bend Station Year: 2021 Page 9 of44 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 Freguency TLDS . TA1 (1.7 km N) - River Bend Training Center.

One ring of stations, one in each meteorological sector in the general area of the SITE BOUNDARY.

. TB1 (0.5 km NNE) - Utility pole near River Bend Station cooling tower yard Quarterly mR exposure quarte~y .

. area.

TC1 (1.7 km NE)- Telephone pole at Jct. US Hwy. 61 and Old Highway 61.

. TD1 (1.6 km ENE) - Stub pole along WF7, 150m S of Jct. WF7 and US Hwy. 61.

. TE1 (1.3 km E) - Stub pole along WF7, 1 km S of Jct. WF7 and US Hwy. 61.

. TF1 (1.3 km ESE) - Stub pole along WF7, 1.6 km S of Jct. WF7 and US Hwy. 61.

. TG1 (1.6 km SE) - Stub pole along WF7, 2 km S of Jct. WF7 and US Hwy. 61.

. TH1 (1.7 km SSE)-Stub pole at power line crossing of WF7 (near Grants Bayou).

. TJ1 (1.5 km S) - Stub pole near River Bend Station Gate #23 on Powell Station Road (LA Hwy. 965).

Plant: River Bend Station Page 10 of 44 Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS TK1 (0.9 km SSW) - Utility pole on Powell Station Road (LA Hwy. 965),

One ring of stations, one in each Quarterly mR exposure quarterly.

20 m S of River Bend Station River meteorological sector in the general area of Access Road.

the SITE BOUNDARY.

. TL 1 (1.0 km SW) - First utility pole on Powell Station Road (LA Hwy. 965) S of former Illinois Central Gulf RR crossing.

. TM1 (0.9 km WSW) - Third utility pole on Powell Station Road (LA Hwy. 965)

N of former Illinois Central Gulf RR crossing.

TN1 (0.9 km W) - Utility pole along Powell Station Road (LA Hwy. 965),

near garden and AN1 air sampler location.

. TP1 (0.9 km WNW) - Behind River Bend Station Activity Center at AP1 air sampler location.

. TQ1 (0.6 km NW) -Across from MA-1 on RBS North Access Road.

. TR1 (0.8 km NNW) - River Bend Station North Access Road across from Main Plant entrance.

Plant: River Bend Station Year: 2021 Page 11 of44 ort Table 2: Exposure Pathway - Direct Radiation Sample Point Description Sampling and Requirement Type and Frequency Of Analyses Distance and Direction Collection Frequency TLDS The balance of the stations (8) to be placed in

. TAC (15.8 km N) - Utility pole at Jct.

of US Hwy. 61 and LA Hwy. 421, 7.9 Quarterly . mR exposure quarterly.

km north of Bains. {Control) special interest areas such as population centers, nearby residences, schools, and in 1 or 2 areas to serve as control locations.

. TCS (12.3 km NE) - Utility pole at gate to East Louisiana State Hospital in Jackson. (Special)

. TEC (16.0 km E) - Stub pole at jct.

of Hwy. 955 and Greenbrier Road, 4.8 km North of Jct. of Hwys 955 and 964. {Control)

. TGS (17.0 km SE) - Entergy Service Center compound in Zachary.

(Special)

. TNS (6.0 km W) - Utility pole with electrical meter at west bank ferry landing {LA Hwy. 10). (Special)

. TQS1 (4.0 km NW) - Utility pole front of Pentecostal church {opposite West Feliciana Parish Hospital) near Jct.

US Hwy. 61 and Commerce Street.

(Special)

. TQS2 (5.8 km NW) - St. Francis Substation on business US Hwy. 61

- in St. Francisville. {Special)

. TRS (9.2 km NNW) - Stub pole at Jct. of US Hwy. 61 and WF2 near

. _Bains (West Feliciana High School).

(Special)

Plant: River Bend Station Page 12 of 44 Table 3: Exposure Pathway - Waterborne Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency SWU (5.0 km W) - Mississippi River about 4 km upstream from the plant SURFACE WATER Grab samples quarterly Gamma isotopic analysis and tritium analysis liquid discharge outfall, near LA Hwy.

quarterly.

10 ferry crossing.

1 sample upstream and 1 sample downstream. . SWD (7.75 km S) - Mississippi River about 4 km downstream from plant liquid discharge outfall, near paper mill.

WU (~470 m NNE) - Upland Terrace GROUNDWATER Aquifer well upgradient from plant.

Samples from 1 or 2 sources only if likely to be affected.

. WD (~470 m SW) - Upland Terrace Aquifer well downgradient from plant.

Semiannually Gamma isotopic and tritium analysis semiannually .

SEDIMENT FROM SHORELINE .

SEDD (7.75 km S)- Mississippi River about 4 km downstream from plant 1 sample from downstream area with existing Annually Gamma isotopic analysis annually .

liquid discharge outfall, near paper or potential recreational value.

mill.

Plant: River Bend Station Year: 2021 Page 13 of 44 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

. If commercially available, 1 sample from milking animals within 8 km distant where

. Currently, no available milking animals within 8 km of RBS.

Quarterly when animals are on pasture.

Gamma isotopic and 1-131 analysis quarterly when animals are on pasture.

doses are calculated to be greater than 1 mrem per year.

. 1 sample from milking animals at a control location 15 - 30 km distant when an indicator location exists.

FISH AND INVERTEBRATES .

FD (7.75 km S) - One sample of a commercially and/or recreationally 1 sample of a commercially and/or Annually Gamma isotopic analysis on edible portions important species from downstream recreationally important species in vicinity annually area influenced by plant discharge.

of plant discharge area.

1 sample of similar species in area not

. FU (4.0 km WSW) - One sample of a commercially and/or recreationally influenced by plant discharge.

important species from upstream area not influenced by plant discharge.

FOOD PRODUCTS GN1 (0.9 km W) - Sampling will be performed in accordance with Table 1 sample of one type of broad leaf Quarterly during the growing Gamma isotopic and 1-131 analysis quarterly.

3.12.1-1 Section 4.a of the Technical vegetation grown near the SITE season.

Requirements Manual.

BOUNDARY location of highest predicted annual average ground level D/Q if milk sampling is not performed. -

. GQC (32.0 km NW) - One sample of similar vegetables from LA State

. 1 sample of similar broadleaf vegetation grown 15 - 30 km distant, if milk sampling Penitentiary at Angola. (Control) is not performed. I 'cc'

Plant: River Bend Station I Year: 2021 I Page 14 of 44 Annual Radiological Environmental Operating Report Figure 1: Exposure Pathway NUCLEAR POW£R Pt.ANT

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Plant: River Bend Station I Year: 2021 I Page 15 of 44 Annual Radiological Environmental Operating Report Figure 2: Sample Collection Sites - Near Field Q B (NV\/) (NNE) /

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(\VNW)

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T Pow'%!! St&ti,on Road Sit~ Property Line

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I J (S) V\/D Sampling Well (Downgradient)

I I G__ Onsite Garden

Plant: River Bend Station I Year: 2021 I Page 16 of 44 Annual Radiological Environmental Operating Report Figure 3: Sample Collection Sites - Far Field B C (NNE) / (NE)

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AS Alr SamplerSpecial T=1 TLD Indicator I T_C TLD Control I T_S SpedalTLDs !O GQC Vegetation Cont,ol I SVvU Upstream S1.uface Waler I I

FU Upstream Fish/lnveriebrBtes I J H FD Downslrea.n1 Fish/lnVertebr\1tes*

I ( $) (SSE)

Plant: River Bend Station I Year: 2021 l Page 17 of 44 Annual Radioloaical Environmental Operating Report 4.0 INTERPRETATION AND TRENDS OF RESULTS 4.1 Air Particulate and Radioiodine Sample Results In 2021 there were no samples above the LLD for 1-131. Indicator gross beta air particulate results for 2021 were comparable to ~esults obtained from 2011-2020 of the operational REMP. Also, the 2021 gross beta annual average was less than the average for preoperational levels. Results are reported as annual average picocuries per cubic meter (pCi/m 3).

Monitoring Period Result 2011 - 2020 (Minimum Value) 0.016 2021 Average Value 0.017 2011 - 2020 (Maximum Value) 0.025 Preoperational 0.030 Gross beta activity is attributed to naturally occurring radionuclides. Table 6, which include gross beta concentrations and provide 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 River Bend Station operations.

FIGURE4 Gross Beta Indicator Results (2021) 0.0500 0.0400

<lJ

  • --~ 0.0300 J:l

~

ua.

0.0200 0.0100 0.0000 01/01/21 02/01/21 03/01/21 04/01/21 05/01/21 06/01/21 07/01/21 08/01/21 09/01/21 10/01/21 11/01/21 12/01/21 01/01/22

@ lliAP1 AAQS2j

Plant: River Bend Station I Year: 2021 I Page 18 of 44 Annual Radioloaical Environmental ODeratina Report 4.2 Thermoluminescent Dosimetry (TLD} Sample Results River Bend Station reports measured dose as net exposure (field reading less transit reading) normalized to 90 days and relies on comparison of the indicator locations to the control as a measure of plant impact. River Bend Station's comparison of the indicator 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 indicator value of 13.3 millirem (mrem) shown in the TLD radiation dose comparison graph below shows the 2021 concentration is comparable to historic results. Overall, River Bend Station concluded that the ambient radiation levels are not being affected by plant operations.

FIGURE 5 TLD Indicator Results (2021) Versus Control Data (1986-2021) 20.00 18.00 16.00

.5 14.00

~ 12.00 10.00 8.00 6.00 TA1 TB1 TC1 TD1 TE1 TF1 TG1 TH1 TJ1 TK1 TL1 TM1 TN1 TP1 TQ1 TR1 TLD Locatj:qns

- +3-sigma Control - - sigma Control 1st0tr II 2nd Qtr A 3rdQtr X 4th Qtr 4.3 Waterborne Sample Results Analytical results for 2021 surface water and groundwater water samples were similar to those reported in previous years. Gamma radionuclides and tritium analytical results for 2021 waterborne samples were below the ODCM-required LLD similar to those reported in previous years. These results are further explained below.

Plant: River Bend Station I Year: 2021 I Page 19 of 44 Annual Radioloaical Environmental Operating Report 4.3.1 Surface Water Results Samples were collected from one indicator and one control location and analyzed for gamma radionuclides and tritium. Tritium and gamma radionuclides were below detectable limits which is consistent with results seen in previous operational years.

Therefore, the operation of River Bend Station had no definable impact on this waterborne pathway during 2021.

4.3.2 Groundwater Results Samples were collected from one indicator and one control location. Groundwater samples were analyzed for gamma radionuclides and tritium. Gamma radionuclides and tritium concentrations were below the LLD limits at the indicator and control locations. The operation of River Bend Station had no definable impact on this waterborne pathway during 2021.

4.3.3 Sediment Sample Results Sediment samples were collected from one indicator and one control location in 2021 and analyzed for gamma radionuclides. Gamma radionuclides were below the LLD limits at both indicator and control locations. River Bend Station operations had no significant impact on the environment or public by this waterborne pathway.

4.4 Ingestion Sample Results 4.4.1 Fish Sample Results Fish samples were collected from one indicator and one control location and analyzed for gamma radionuclides. In 2021, gamma radionuclides were below detectable limits which are consistent with the preoperational monitoring period and operational results. Therefore, based on these measurements, River Bend Station operations had no significant radiological impact upon the environment or public by this ingestion pathway.

4.4.2 Food Products Sample Results The REMP has detected radionuclides priorfo 1990 that are attributable to other sources. These include the radioactive plurrii3 release due to reactor core degradation at Chernobyl Nuclear Power Plant in 1986 and atmospheric weapons testing.

In 2021, food products samples were collected when available from one indicator and one control location and analyzed for gamma radionuclides. The 2021 levels remained undetectable, as has been the case in previous years. Therefore, based on these measurements, River Bend Station operations had no significant radiological impact upon the environment or public by this ingestion pathway.

Plant: River Bend Station I Year: 2021 I Page 20 of 44 Annual Radiological Environmental Operating Report 4.4.3 Milk Sample Results In 2021 milk samples within five miles (8 km) of River Bend Station were unable to be collected due to the unavailability of milk-producing animals used for human consumption. The River Bend Station Technical Requirements Manual requires collection of milk samples if available commercially within 8 km (5 miles) of the plant.

River Bend Station personnel collected food product samples to monitor the ingestion pathway, as specified in River Bend Station Technical Requirements Manual Table 3.12.1-1, because of milk unavailability. Food product sample results are in section 4.4.2.

4.5 Land Use Census Results The latest land use census (performed in 2020) did not identify any new locations that yielded a calculated dose or dose commitment greater than those currently calculated (see Table 5).

A garden census is not conducted pursuant to the note in the TRM (TLCO 3.12.2) that allows the sampling of broad leaf vegetation in the highest calculated average ground-level D/Q sector near site boundary in lieu of the garden census.

The land use census identified no changes in the new resident census.

There were no changes in the milk cows or food products in 2020.

Plant: River Bend Station I Year: 2021 I Page 21 of 44 Annual Radioloaical Environmental Operatina Report Table 5: Land Use Census -2020 Nearest Residence And Milk Animal Within Five Miles Nearest Range Range Sector Direction Nearest Milk Animal Comment Residence (Unit) (Unit)

A N 5637 Hwy 61 - - 2 St. Francisville, LA 70775 1.7 B NNE 4549 Old Hwy 61

- - 2 St. Francisville, LA 70775 1.4 4553 Old Hwy 61 C NE St. Francisville, LA 70775 1.5

- - 2 D ENE 12657 Powell Station Rd.

- - 2 St. Francisville, LA 70775 1.4 E

4635 Hwy 61 E - - 2 St. Francisville, LA 70775 2.4 12019 Fairview Way F ESE Jackson, LA 70748 2.6

- - 2 G SE 3319 Hwy 964

- - 2 Jackson, LA 70748 3.7 SSE 11813 Powell Station Rd.

H - - 2 St. Francisville, LA 70775 1.7 J s 11649 Powell Station Rd.

- - 2 St. Francisville, LA 70775 1.8 K SSW 8909 Hwy 981

- - 2 New Roads, LA 70760 6.6 L SW -- - - 1, 2 M WSW 8809 Hwy 981

- - 2 New Roads, LA 70760 5.1 N w -- - - 1, 2 p WNW 10426 Old Field Rd.

- - 2 St. Francisville, LA 70775 3.7 Q NW 9537 Hwy 965

- - 2 St. Francisville, LA 70775 1.3 R NNW 9794_Rwy 965

- 2 St. Francisville, LA 70775 1.6 .. *,-;;,;/

  1. Comment 1 No Residence was located within a five-mile (8 km) radius of River Bend Station 3.

2 No Milk animals were found located within a five-mile (8 km) radius of River Bend Station 3.

Plant: River Bend Station I Year: 2021 I Page 22 of 44 Annual Radiological Environmental Operating Report 4.6 lnterlaboratory Comparison Results Attachment 3 contains result summary for lnterlaboratory Comparison program for Teledyne Brown Engineering to fulfill the requirements of River Bend Station's Technical Requirements Manual 3.12.3.

5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

1. Table 6, Radiological Environmental Monitoring Program Summary, summarizes data for the 2021 REMP program.

T

Plant: River Bend Station Year: 2021 Page 23 of44 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Sample Type (Units)

Air Particulates (pCi/m3)

Type/ Number of Analyses<1>

GB/ 104 B

D Indicator Locations Mean (F)C3>

[Range]

0.0168 (78/78)

[0.006 - 0.029]

Location <4>

[Highest Annual Mean]

AGC (17.0 km SE)

Mean (Fi31

[Range]

0.0174 (26/26)

[0.007 - 0.027]

Control Locations Mean (F)C3l [Range]

0.0174 ,-~"U/

[0.007 - 0.027]

Number of Non Routine Resultsl5!

0 Airborne Iodine 1-131 / 104 0.07 < LLD N/A N/A < LLD 0 (pCi/m3)

Indicator TLDs Gamma/64 lb) 13.3 (64/64) 11,.:;1 15.5 (4/4) NIA 0 (mR/Qtr) [9.8 -16.4) (1.6 km SE) [14.6 -16.4)

Special Interest Gamma/24 (6) 14.1 (24/24) TGS 15.8 (4/4) N/A 0 TLDs (mR/Qtr) [11.7-17.2) (17.0 km SE) [14.8 - 17.2]

Gamma/ 8 (6) N/A TAC 15.3 (4/4) 14.7 (8/8)

ControlTLDs 0 (mR/Qtrl (15.8 km N) [14.7 -16.0] [13.2 - 16.0]

H-3 / 8 700 < LLD N/A N/A < LLD 0 GS/8 Mn-54 15 < LLD N/A N/A < LLD 0 Co-58 15 < LLD N/A N/A < LLD 0 Fe-59 30 <LLD N/A N/A < LLD 0 Co-60 15 < LLD NIA N/A < LLD 0 Surface Water Zn-65 - 30 < LLD N/A N/A < LLD 0 (pCi/L) --

Nb-95 15 <LLD N/A N/A --:: LLD 0 1-131 15 < LLD N/A N/A < LLD 0 Zr-95 30 < 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 - "-:, 'c' 60 < LLD N/A N/A ,_',;,e;LLD 0 La-140 15 < LLD N/A N/A <-LLD 0

Plant: River Bend Station Year: 2021 Page 24 of 44 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Sample Type (Units)

Type I Number of Analyses< 1J H-3 I 4 GSl4 B 2000 Indicator Locations Mean (F) 131

[Range]

< LLD Location 141

[Highest Annual Mean]

NIA Mean (F}'31

[Range]

NIA Control Locations Mean (F)<3l [Range]

< LLD Number of Non Routine Results<5l 0

Mn-54 15 < LLD NIA NIA < LLD 0 Co-58 15 < LLD NIA NIA < LLD 0 Fe-59 30 < LLD NIA NIA < LLD 0 Co-60 15 < LLD NIA N/A < LLD 0 Groundwater Zn-65 30 < LLD NIA NIA < LLD 0 (pCi/L)

Nb-95 15 < LLD NIA NIA < LLD 0 1-131 15 < LLD NIA NIA < LLD 0 Zr-95 30 < LLD NIA NIA < LLD 0 Cs-134 15 < LLD NIA N/A < LLD 0 Cs-137 18 < LLD NIA NIA < LLD 0 Ba-140 60 < LLD NIA NIA < LLD 0 La-140 15 < LLD N/A N/A < LLD 0

Plant: River Bend Station Year: 2021 Page 25 of 44 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Location <4> Control Number of Sample Type Type/ Number Mean (F)C3l LLD <2> Mean (F)C3l [Highest Annual Locations Mean Non Routine (Units) of Analyses< 1> [Range]

[Range] Mean] (F)<3> [Range] Results<5>

GSl2 Cs-134 150 < LLD NIA NIA < LLD 0 Cs-137 180 < LLD NIA NIA < LLD 0 GSl2 Mn-54 130 < LLD NIA NIA < LLD 0 Co-58 130 < LLD NIA NIA < LLD 0 Fish Fe-59 260 < LLD NIA NIA < LLD 0 (pCi/kg wet) Co-60 130 < LLD NIA NIA < LLD 0 Zn-65 260 < LLD NIA NIA < LLD 0 Cs-134 130 < LLD NIA NIA < LLD 0 Cs-137 150 < LLD NIA NIA < LLD 0 D

GSl8 Food Products 1-131 60 < LLD NIA NIA < LLD (pCilkg wet) Cs-134 60 < LLD NIA NIA < LLD Cs-137 80 < LLD NIA NIA < LLD LEGEND:

(1 >- GB= Gross beta; 1-131_ = lodine-131; H-3 = Tritium; GS= Gamma scan.

<2 ) - LLD = Required lower limit of detection based on River Bend Station TRM.

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

(4 ) - Locations are specifiecl(1) by name and (2) direction relative to reactor site.

(5) - Non-routine results areethose 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.

(G) - LLD is not defined in River Bend Station TRM.

Plant: River Bend Station Year: 2021 Page 26 of44 Annual Radiological Environmental Operating Report Attachment 1 Page 1 of2 Sample Deviations Table 7: Sample Deviations Table Sample Comment Sample Media Date Problem Evaluation I Actions No. Location Affected During the performance of REMP-3 it was discovered that the environmental air sampler at location AGC experienced a loss of power on 4/29/21 1315 for approximately 19 minutes. The sampler was operating normally at the time of Air 1 AGC 05/13/2021 Power Outage discovery, and it was verified that an adequate sample volume was obtained for Sample the sample period. This condition will be reported in the 2021 AREOR as a sample deviation. No further actions are needed at this time. (CR-RBS-2021-03642)

During the performance of REMP-3 ii was noted that the environmental air samplers at locations AR1, AQ1, AP1, and AN1 experienced multiple power outages during the 5-10-21 to 5-24-21 sample period. The first outage occurred for all four of the previously named samplers on 5-17-21 at 2135 for AR1 approximately 1 minute. This outage is due to an electrical transient due to AQ1 severe weather. All four samplers experienced a second outage on 5-18-21 for Air 2 05/25/2021 Power Outage approximately 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. This was due to a planned outage of Grant Substation Sample AP1 for construction loop repairs. AR1 experienced a third outage for 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> and AN1 38 minutes on 5-22-21 at 1004. The cause of this power loss is unknown. All samplers were operating normally on 5-24-21. It was verified that all samplers obtained a sufficient sample volume for the period to meet required LLDs. This condition will be reported in th-e AREOR as a sample deviation. No further actions are needed at this time. (CR-RBS-2021-03840)

Plant: River Bend Station Year: 2021 Page 27 of44 ort Attachment 1 Page 2 of 2 Sample Deviations Table 7: Sample Deviations Table Sample Comment Sample Media Date Problem Evaluation/ Actions No. Location Affected During the performance of REMP-3, it was discovered that the environmental air sampler at location AGC experienced a power outage on 6/12/21 15:22 for one hour and twenty-two minutes. The cause of this power outage is suspected to be due to an electrical transient that occurred in the area. It was verified that an adequate sample volume was collected for the sample period, and the sampler Air 3 AGC 06/22/2021 Power Outage was operating normally at the time of discovery. In addition, the LADEQ air Sample sampler at the same location was found not running and had a blown fuse.

LADEQ was contacted to replace the sampler and/or fuse,. The condition of the REMP air sampler will be evaluated and reported in the 2021 AREOR as a sample deviation. No further actions are needed at this time. (CR-RBS-2021-04446)

During the performance of REMP-3, it was discovered that air sampler at location AGC experienced three losses of power from 08/28/21 1655 to 08/29/21 2144. The power losses were one, four, and two minutes in duration, respectively for a total of 7 minutes during the sample period. The cause of Air 4 AGC 8/31/2021 Power Outage these power losses is attributed to severe weather conditions caused by Sample Hurricane Ida affecting the area. It was verified that a sufficient sample volume was collected to meet the required LLD. This condition will be evaluated and reported in the 2021 AREOR as a sample deviation. No further actions are needed at this time. (CR-RBS-2021-05612)

Plant: River Bend Station I Year: 2021 I Page 28 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 1 of 11 Monitoring Results Tables Table 8: Air Particulate Data Table Analysis: Gross Beta Units: pCi/m3 AN1 AP1 AQS2 AGC <1>

Start Date End Date (Indicator} (Indicator} (Indicator} (Control}

REQUIRED LLD + 0.01 0.01 0.01 0.01 01/04/2021 01/18/2021 0.021 0.022 0.020 0.025 01/18/2021 02/01/2021 0.014 0.017 0.015 0.015 02/01/2021 02/17/2021 0.017 0.019 0.019 0.020 02/17/2021 03/01/2021 0.018 0.020 0.018 0.019 03/01/2021 03/15/2021 0.013 0.016 0.013 0.015 03/15/2021 03/29/2021 0.011 0.010 0.011 0.009 03/29/2021 04/12/2021 0.020 0.019 0.020 0.017 04/12/2021 04/26/2021 0.018 0.018 0.016 0.017 04/26/2021 05/10/2021 0.018 0.016 0.018 0.018 05/10/2021 05/24/2021 0.013 0.011 0.015 0.013 05/24/2021 06/07/2021 0.012 0.012 0.010 0.015 06/07/2021 06/21/2021 0.009 0.011 0.010 0.009 06/21/2021 07/06/2021 0.007 0.006 0.009 0.007 07/06/2021 07/19/2021 0.009 0.014 0.011 0.012 07/19/2021 08/02/2021 0.015 0.017 0.016 0.012 08/02/2021 08/16/2021 0.015 0.009 0.017 0.015 08/16/2021 08/31/2021 0.012 0.013 0.014 0.015 08/31/2021 09/13/2021 0.017 0.018 0.019 0.021 09/13/2021 09/27/2021 0.014 0.015 *.:.;*. 0.016 0.015 09/27/2021 10/11/2021 0.027 0.023 "

0.025 0.025 10/11/2021 10/25/2021 0.019 0.021 --;;~

": 0.020 0.025 10/25/2021 11/08/2021 0.022 0.026 0.028 0.026 11/08/2021 11/22/2021 0.026 0.026 0.029 0.026 11/22/2021 12/07/2021 0.025 0.026 0.028 0.027 12/07/2021 12/20/2021 0.016 0.018 0.016 0.017 12/20/2021 01/04/2022 0.018 0.018 0.015 0.021

!1> Station with highest annual mean.

Plant: River Bend Station I Year: 2021 I Page 29 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 2 of 11 Monitoring Results Tables Table 9: Radioiodine Cartridge Data Table Analysis: 1-131 Units: pCi/m 3 AN1 AP1 AQS2 AGC Start Date End Date (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD + 0.07 0.07 0.07 0.07 01/04/2021 01/18/2021 < 0.014 < 0.014 < 0.011 < 0.008 01/18/2021 02/01/2021 < 0.020 < 0.009 < 0.020 < 0.015 02/01/2021 02/17/2021 < 0.005 < 0.012 < 0.012 < 0.010 02/17/2021 03/01/2021 < 0.024 < 0.010 < 0.024 < 0.010 03/01/2021 03/15/2021 < 0.023 < 0.022 < 0.022 < 0.022 03/15/2021 03/29/2021 < 0.023 < 0.023 < 0.010 < 0.017 03/29/2021 04/12/2021 < 0.016 < 0.016 < 0.016 < 0.012 04/12/2021 04/26/2021 < 0.025 < 0.024 < 0.025 < 0.011 04/26/2021 05/10/2021 < 0.013 < 0.019 < 0.019 < 0.008 05/10/2021 05/24/2021 < 0.009 < 0.022 < 0.022 < 0.009 05/24/2021 06/07/2021 < 0.011 < 0.026 < 0.026 < 0.023 06/07/2021 06/21/2021 < 0.006 < 0.023 < 0.023 < 0.011 06/21/2021 07/06/2021 < 0.017 < 0.017 < 0.017 < 0.008 07/06/2021 07/19/2021 < 0.017 < 0.017 < 0.014 < 0.025 07/19/2021 08/02/2021 < 0.007 < 0.018 < 0.019 < 0.019 08/02/2021 08/16/2021 < 0.012 < 0.018 < 0.019 < 0.008 08/16/2021 08/31/2021 < 0.006 < 0.014 < 0.015 < 0.016 08/31/2021 09/13/2021 < 0.009 < 0.022 < 0.022 < 0.008 09/13/2021 09/27/2021 < 0.009 < 0.018 < 0.018 < 0.019 09/27/2021 10/11/2021 < 0.016 < 0.016::-- < 0.007 < 0.011 10/11/2021 10/25/2021 < 0.016 < 0.007 < 0.016 < 0.010 10/25/2021 11/08/2021 < 0.013 < 0.019 < 0.020 < 0.020 11/08/2021 11/22/2021 < 0.009 < 0.015 < 0.013 < 0.016 11/22/2021 12/07/2021 < 0.006 < 0.013 < 0.010 < 0.013 12/07/2021 12/20/2021 < 0.018 < 0.018 < 0.018 < 0.015 12/20/2021 01/04/2022 < 0.012 < 0.012 < 0.012 < 0.012

Plant: River Bend Station I Year: 2021 I Page 30 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 3 of 11 Monitoring Results Tables Table 10: Thermoluminescent Dosimeters - Indicators Analysis: Gamma Dose Units: mrem/Std. Qtr.

1st Qtr 2 nd Qtr 3rd Qtr 4 th Qtr Annual Mean Station 2021 2021 2021 2021 2021 TA1 10.4 10.7 10.4 11.1 10.6 TB1 14.1 15.2 13.6 15.5 14.6 TC1 14.7 15.4 14.3 15.9 15.1 TD1 14.3 15.4 14.3 15.8 15.0 TE1 12.5 14.0 13.6 14.3 13.6 TF1 13.6 14.5 13.1 15.0 14.1 TG1<1> 15.1 16.4 14.6 16.1 15.5 TH1 11.3 12.6 12.1 13.2 12.3 TJ1 13.2 13.6 13.0 13.4 13.3 TK1 14.0 14.0 13.5 14.3 14.0 TL 1 14.2 14.7 13.7 14.7 14.3 TM1 12.4 12.0 11.2 12.7 12.1 TN1 14.3 14.1 13.7 14.5 14.2 TP1 13.2 13.1 13.0 13.3 13.2 TQ1 10.7 10.7 10.5 11.3 10.8 TR1 10.5 11.0 9.8 10.8 10.5 (1> Indicator station with highest annual mean:

Plant: River Bend Station I Year: 2021 .I Page 31 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 4 of 11 Monitoring Results Tables Table 11: Thermoluminescent Dosimeters - Special Interest Areas Analysis: Gamma Dose Units: mrem/Std. Qtr.

1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2021 2021 2021 2021 2021 TCS 13.1 13.2 11.7 12.7 12.7 TGs<1> 15.1 16.0 14.8 17.2 15.8 TNS 13.8 13.2 12.3 14.0 13.3 TRS 14.9 14.9 13.1 14.7 14.4 TQS1 15.2 16.0 14.7 15.5 15.3 TQS2 13.0 13.2 12.2 13.5 13.0 C1> Special interest station with highest annual mean.

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

1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2021 2021 2021 2021 2021 TAc<1> 14.7 15.6 14.7 16.0 15.3 TEC 13.9 13.9 13.2 15.5 14.1 C1> Control station with highest annual mean.

Plant: River Bend Station Year: 2021 Page 32 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 5 of 11 Monitoring Results Tables Table 13: 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 1-131 Zr-95 Cs-134 Cs-137 Ba-140 La-140 REQUIRED LLD + 15 15 30 15 30 15 15 30 15 18 60 15 SWD 03/01/2021 03/01/2021 <4.98 <4.89 < 13.7 <4.97 < 10.4 < 6.10 < 11.5 < 10.1 < 6.09 <4.80 < 33.5 < 10.6

/Indicator) swu 03/01/2021 03/01/2021 <4.90 < 5.97 < 14.1 < 6.83 < 14.9 < 6.91 < 14.7 < 11.8 < 7.11 < 5.55 <27.4 < 10.8

/Contrell SWD 05/06/2021 05/06/2021 < 3.45 < 6.27 < 7.88 <4.36 < 9.46 <4.23 < 13.7 < 7.07 < 5.14 < 4.48 < 34.0 < 8.36 (Indicator) swu 05/06/2021 05/06/2021 < 5.07 < 5.59 < 13.9 < 4.20 < 10.8 <4.51 < 12.4 < 6.91 < 4.40 <4.64 < 30.1 < 8.80 (Contrell SWD 08/02/2021 08/02/2021 < 6.02 < 4.52 < 12.1 < 8.42 < 9.69 < 5.58 < 9.40 < 10.3 < 7.49 < 6.15 <22.5 < 8.31

/Indicator) swu 08/02/2021 08/02/2021 < 5.75 < 6.38 < 9.77 < 7.44 < 7.25 < 5.08 < 6.86 < 10.8 < 4.99 < 5.05 < 19.2 < 6.32 (Control)

SWD 11/08/2021 11/08/2021 < 5.91 < 7.44 < 11.2 < 7.01 < 12.5 < 7.74 < 10.9 < 11.1 < 8.59 < 6.30 < 32.0 < 11.6

/Indicator\

swu 11/08/2021 11/08/2021 < 6.03 < 6.18 < 12.6 < 7.38 < 15.3 < 6.96 < 11.2 < 11.3 < 8.06 < 5.83 < 37.1 < 8.79 (Control)

Plant: River Bend Station I Year: 2021 I Page 33 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 6 of 11 Monitoring Results Tables Table 14: Surface Water-Tritium Analysis: H-3 Units: pCi/L Location Start Date End Date H-3 REQUIRED LLD + 2000 SWD (Indicator) 03/01/2021 03/01/2021 < 551 SWU (Control) 03/01/2021 03/01/2021 < 547 SWD (Indicator) 05/06/2021 05/06/2021 <487 SWU (Control) 05/06/2021 05/06/2021 < 506 SWD (Indicator) 08/02/2021 08/02/2021 < 502 SWU (Control) 08/02/2021 08/02/2021 < 508 SWD (Indicator) 11/08/2021 11/08/2021 < 525 SWU (Control) 11/08/2021 11/08/2021 <489

Plant: River Bend Station Year: 2021 Page 34 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 7 of 11 Monitoring Results Tables Table 15: Groundwater- Gamma Analysis: Gamma Isotopic Units: pCI/L Collection Location Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 1-131 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Date REQUIRED LLD~ 15 15 30 15 30 15 15 30 15 18 60 15 WD (Indicator) 05/13/2021 < 5.08 < 6.42 < 12.8 < 5.42 < 12.0 < 6.34 < 8.74 < 10.2 < 5.64 < 5.69 < 27.4 < 11.5 WU (Control) 05/13/2021 <7.08 < 6.68 < 13.3 < 6.96 < 10.9 < 7.01 < 10.6 < 9.69 < 8.02 < 7.41 < 32.5 < 11.2 WO (Indicator) 11/08/2021 < 5.88 <4.94 < 13.5 < 5.62 < 11.9 < 7.27 < 12.2 < 9.09 < 6.39 < 6.93 < 34.5 < 11.9 WU (Control) 11/08/2021 < 5.44 < 7.32 < 16.2 < 6.94 < 15.1 < 6.23 < 10.8 < 11.7 < 7.77 < 6.75 < 35.0 < 10.2

Plant: River Bend Station I Year: 2021 I Page 35 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 8 of 11 Monitoring Results Tables Table 16: Groundwater-Tritium Analysis: H-3 Units: pCi/L Location Start Date End Date H-3 REQUIRED LLD + 2000 WO (Indicator) 05/13/2021 05/13/2021 <499 WU (Control) 05/13/2021 05/13/2021 < 500 WO (Indicator) 11/08/2021 11/08/2021 < 459 WU (Control) 11/08/2021 11/08/2021 <472

Plant: River Bend Station I Year: 2021 I Page 36 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 9 of 11 Monitoring Results Tables Table 17: Sediment- Gamma Analysis: Gamma Isotopic Units: pCi/kg (dry)

Location I Collection Date Cs-134 Cs-137 REQUIRED LLD + 150 180 SEDD (Indicator) I 11/08/2021 < 68.47 < 71.89 SEDU (Control) I 11/08/2021 < 103.4 < 100.6

Plant: River Bend Station I Year: 2021 I Page 37 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 1O of 11 Monitoring Results Tables Table 18: Fish - Gamma Analysis: Gamma Isotopic Units: pCi/kg (wet)

Collection Location Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Date REQUIRED LLD + 130 130 260 130 260 130 150 FD 09/21/2021 < 59.74 < 50.52 < 135.2 < 69.52 < 122.4 < 47.40 < 54.08 (Indicator)

FU 09/21/2021 < 49.79 < 41.77 < 86.25 < 48.12 < 92.22 < 38.84 < 53.67 (Control)

Plant: River Bend Station I Year: 2021 I Page 38 of 44 Annual Radiological Environmental Operating Report Attachment 2 Page 11 of 11 Monitoring Results Tables Table 19: Food Products - Gamma Analysis: Gamma Isotopic Units: pCi/kg (wet)

Location Collection Date 1-131 Cs-134 Cs-137 REQUIRED LLD + 60 60 80 GN1 (Indicator) 02/01/2021 < 30.17 < 32.59 < 34.49 GQC (Control) 02/01/2021 < 27.55 < 19.77 < 24.35 GN1 (Indicator) 05/06/2021 < 33.17 < 13.47 < 11.96 GQC (Control) 05/06/2021 < 23.51 < 8.269 < 7.463 GN1 (Indicator) 08/16/2021 < 42.21 < 34.95 < 29.29 GQC (Control) 08/16/2021 < 28.55 < 24.85 < 26.22 GN1 (Indicator) 11/09/2021 < 32.69 < 30.77 < 32.24 GQC (Control) 11/09/2021 < 31.85 < 31.61 < 24.23

Plant: River Bend Station I Year: 2021 I Page 39 of 44 Annual Radiological Environmental Operating Report Attachment 3 Page 1 of 6 lnterlaboratory Comparison Program Results 1.0 Summary For the Teledyne Brown Engineering (TBE) laboratory, 146 out of 153 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.

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 ERA MRAD March 2021 Water Fe-55 result was evaluated as Not Acceptable. The reported value for Fe-55 was 579 pCi/L and the known result was 275 pCi/L (acceptance range 162 - 400). When reviewing the original sample data, it was found that the carrier yield was 52.6% (lower than typical water samples). Looking at the etched plate that was counted, it appeared that some loss of sample could have occurred. The sample was logged for reanalysis and used as the workgroup duplicate. The results were acceptable at 197 and 221 respectively. Yields were 97.4% and 105.7% and the plated samples were centered with no apparent loss of sample. The loss of sample during plating resulted in a low yield which produced an artificially high sample result. (NCR 21-01)
2. The MAPEP February 2021 AP Gross Alpha result was evaluated as Not Acceptable. The reported value was 0.371 Sq/sample and the known result was 1.77 Sq/sample (acceptance range 0.53 - 3.01). A similar failure had occurred several years prior due to the filter being placed with the wrong side up on the detector. At that time, a small dot was placed on the top of the filter prior to removal from the package to indicate the correct side for counting. The current sample was still in the detector when the result was received (dot side facing the detector). The sample was recounted with a similaLresult and was flipped and recounted. The flipped result was 0.661 Sq/sample, within the acceptable range.

Because TBE cannot rely on receiving correct pacK~ging from the provider, MAPEP AP cross-checks will be counted on both sid8s going forward. NOTE:

The August sample had the same packaging issue (upside down). (NCR 21-02)

3. The MAPEP February 2021 soil Ni-63 was evaluated as Not Acceptable. The reported value was 310 Bq/kg and the known result was 689 (acceptance range 482 - 896). All workgroup QC was reviewed with no anomalies. The analytical procedure had been revised prior to this analysis to eliminate added interferences. The sample yield was >100%, indicative of incomplete separation from interferences, leading to a lower result. The procedure was again revised after acceptable results were obtained. (NCR 21-03)

Plant: River Bend Station I Year: 2021 I Page 40 of 44 Annual Radiological Environmental Operating Report Page 2 of 6 lnterlaboratory Comparison Program Results

4. The ERA October 2021 water Gross Beta result was evaluated as Not Acceptable. The reported value was 63.0 pCi/L and the known was 55.7 (acceptance range 38.1 - 62.6) or 113% of the known. The 2-sigma error was 6.8, placing the reported result well within the acceptable range. All QA was reviewed with no anomalies. A follow-up Quick Response cross-check was analyzed with a 120% ratio (see item 7). (NCR 21-10)
5. The ERA October 2021 water Tritium result was evaluated as Not Acceptable.

The reported value was 13,800 pCi/L and the known was 17,200 (acceptance range 15,000 - 18,900). The 2-sigma error was 1,430, placing the result within the acceptable range. TBE's internal QC acceptance is 70% - 130%, while ERA's for this sample was 87% - 110%. All QA was reviewed with no anomalies.

A Quick Response follow-up cross-check was analyzed with a result of 17,500 pCi/L (known 17,800 pCi/L). (NCR 21-11)

6. The MAPEP August 2021 soil Ni-63 result was evaluated as Not Acceptable.

The reported value was 546 Bq/kg and the known result was 1,280 Bq/kg (acceptance range 896 - 1,664). All QC was reviewed and no anomalies found.

The procedure revision to remove added MAPAP interferences was ineffective for this sample. No client soil matrix samples were analyzed for Ni-63 in 2020 or 2021. The root cause investigation is still ongoing at this time. (NCR 21-13)

7. The ERA December 2021 Quick Response water Gross Beta result was evaluated as Not Acceptable. The reported value was 47.6 pCi/L and the known was 39.8 pCi/L or 120% of the known (acceptance range of 26.4 - 47.3). The 2-sigma error was 6.1, placing the reported result well within the acceptable range.

All QA was reviewed with no anomalies. The original sample was recounted on a different detector with a result of 40.3 +/- 6.27 pCi/L. The "failure" of this sample and the RAD-127 was due to the narrow upper acceptance ranges assigned (119% and 112%) (NCR 21-14)

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: River Bend Station I Year: 2021 I Page41 of44 Annual Radiological Environmental Operating Report Attachment 3 Page3 of 6 Table 20: 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 (bl Number Value (a) Analytics Result Value March 2021 E13466 Milk Sr-89 pCi/L 84.6 87.1 0.97 A Sr-90 pCi/L 11.5 12.6 0.91 A E13467 Milk Ce-141 pCi/L 111 125 0.89 A Co-58 pCi/L 123 128 0.96 A Co-60 pCi/L 140 154 0.91 A Cr-51 pCi/L 252 242 1.04 A Cs-134 pCi/L 130 151 0.86 A Cs-137 pCi/L 110 110 1:00 A Fe-59 pCi/L 105 109 0.96 A 1-131 pCi/L 77.6 86.9 0.89 A Mn-54 pCi/L 111 112 0.99 A Zn-65 pCi/L 200 211 0.95 A E13468 Charcoal 1-131 pCi 83.5 88.5 0.94 A E13469 AP Ce-141 pCi 103.0 103 1.00 A Co-58 pCi 93.3 105 0.89 A Co-60 pCi 136 126 1.08 A Cr-51 pCi 213 198 1.07 A Cs-134 pCi 123.0 124 0.99 A Cs-137 pCi 86.3 90.1 0.96 A Fe-59 pCi 81.3 89.6 0.91 A Mn-54 pCi 93.5 92.0 1.02 A Zn-65 pCi 166 173 0.96 A E13470 Soil Ce-141 pCi/g 0.232 0.262 0.89 A Co pCi/g 0.251 0.268 0.94 A Co-60 pCi/g 0.306 0.322 0.95 A Cr-51':t pCi/g 0.517 0.506 1.02 A Css134:.___. pCi/g 0.263 0.317 0.83 A Cs-131:,,, pCi/g 0.278 0.301 0.92 A Fe-59 pCi/g 0.228 0.229 1.00 A Mn-54 pCi/g 0.221 0.235 0.94 A Zn-65 pCi/g 0.448 0.441 1.02 A E13471 AP Sr-89 pCi 92.2 95.5 0.97 A Sr-90 pCi 11.7 13.9' 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 faffs 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: River Bend.Station I Year:2021 I Page 42 of 44 Annual Radiological Environmental Operating Report Attachment 3 Page4 of 6 Table 20: 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 (bl Number Value (aJ Analytics Result Value September 2021 E13472 Milk Sr-89 pCi/L 66.4 85.4 0.78 w Sr-90 pCi/L 11.9 14.0 0.85 A E13473 Milk Ce-141 pCi/L 118 114 1.03 A Co-58 pCi/L 116 118 0.98 A Co-60 pCi/L 142 145 0.98 A Cr-51 pCi/L 244 236 1.03 A Cs-134 pCi/L 81 93.1 0.87 A Cs-137 pCi/L 105 112 0.94 A Fe-59 pCi/L 105 102 1.03 A 1-131 pCi/L 65.1 85.6 0.76 w Mn-54 pCi/L 128 128 1.00 A Zn-65 pCi/L 158 153 1.03 A E13474 Charcoal 1-131 pCi 85.2 90.9 0.94 A E13475 AP Ce-141 pCi 126 135 0.94 A Co-58 pCi 148 139 1.07 A Co-60 pCi 183 171 1.07 A Cr-51 pCi 322 278 1.16 A Cs-134 pCi 118 110 1.08 A Cs-137 pCi 147 132 1.12 A Fe-59 pCi 131 120 1.09 A Mn-54 pCi 161 151 1.06 A Zn-65 pCi 202 180 1.12 A E13476 Soil G_e-141 pCi/g 0.215 0.219 0.98 A Go-58 pCi/g 0.208 0.226 0.92 A ---

Co-60 pCi/g 0.277 0.277 1.00 A er-51 pCi/g 0.388 0.452 0.86 A cs~134 pCi/g 0.157 0.178 0.88 A

'0'~~137 pCi/g 0.270 0.284 0.95 A Fe-59 pCi/g 0.218 0.195 1.12 A Mn-54 pCi/g 0.239 0.246 0.97 A Zn-65 pCi/g 0.312 0.293 1.06 A E13477 AP Sr-89 pCi 85.6 68.3 1.25 w Sr-90 pCi 12.6 11.2 1.13 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 2 of 4)

Plant: River Bend Station I Year: 2021 I Page43 of44 Annual Radiological Environmental Operating Report Attachment 3 Page 5 of6 Table 21: DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teled3£ne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (a) Range Value 0.53-3.01 N(3)

February 2021 21-GrF44 AP Gross Alpha Sq/sample 0.371 1.77 Gross Beta Sq/sample 0.731 0.65 0.325 - 0.974 A 21-MaS44 Soil Ni-63 Bq/kg 310 689.0 482-896 N(4l Tc-99 Bq/kg 457 638 447-829 w 21-MaSU44 Urine Cs-134 Bq/L 2.34 2.73 1.91 - 3.55 A Cs-137 Bq/L 2.54 2.71 1.90-3.52 A Co-57 Bq/L 0.4100 (1) A Co-60 Bq/L 2.24 2.44 1.71 - 3.17 A Mn-54 Bq/L 2.03 2.03 1.42 - 2.64 A K-40 Bq/L 52.8 54.0 38-70 A U-234 Bq/L 0.108 0.0877 0.0614 - 0.114 w U-238 Bq/L 0.101 0.091 0.064 - 0.118 A Zn-65 Bq/L 1.06 1.34 (2) A 21-MaW44 Water Ni-63 Bq/L 6.7 8.2 5.7 - 10.7 A Tc-99 Bq/L 3.850 4.01 2.81 - 5.21 A 21-RdV44 Vegetation Cs-134 Sq/sample 3.13 3.60 2.5-4.7 A Cs-137 Sq/sample 4.64 4.69 3.28- 6.10 A Co-57 Sq/sample 5.25 5.05 3.54- 6.57 A Co-60 Sq/sample 2.86 2.99 2.09-3.89 A Mn-54 Sq/sample 5.02 5.25 3.68- 6.83 A Sr-90 Sq/sample 0.631 0.673 0.471 - 0.875 A Zn-65 Sq/sample -0.233 (1) A August2021 21-GrF45 AP Gross Alpha Sq/sample 0.368 0.960 0.288 - 1.632 A Gross Beta Sq/sample 0.595 0.553 0.277 - 0.830 A 21-MaS45

  • Soil Ni-63 Bq/kg 546 1280 896 -1664 N(5)

Tc-99 Bq/kg 453 777 544 - 1010 N(sJ 21-MaSU45 Urine Cs-134 Bq/L 3.10 3.62 2.53-4.71 A Cs-137 Bq/L 0.083 (1) A Co-57 Bq/L 0.844 0.87 0.606 - 1.125 A Co-60 Bq/L 0.0535 (1) .A Mn-54 Bq/L 0.459 0.417 (2) A_

K-40 Bq/L 48.8 54.0 38-70 A_

U-234 Bq/L 0.133 0.116 0.081 - 0.151 A U-238 Bq/L 0.137 0.121 0.085 - 0.157 A Zn-65 Bq/L 0.339 0.420 (2) Pi?"

21-MaW45 Water . *-Ni-63 Bq/L 33.5 39.5 27.7-51.4 A--

.. *seTc-99 Bq/L 3.5 3.7 2.60 -4.82 71::y*

21-RdV45 Vegetation Cs-134 Sq/sample 3.42 4.34 3.04 -5.64 w Cs-137 Sq/sample 2.14 2.21 1.55 - 2.87 A Co-57 Sq/sample 4.08 4.66 3.26- 6.06 A Co-60 Sq/sample 2.81 3.51 2.46-4.56 A Mn-54 Sq/sample 0.035 (1) A Sr-90 Sq/sample 1.15 1.320 0.92 - 1.72 A Zn-65 Sq/sample 2.05 2.43 1.70-3.16 A (a) The MA PEP 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) DOEIMAPEP 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) See NCR 21-02 (4) See NCR 21-03 (5) See NCR 21-13 (6) Tc-99 cross-checks done for TBE information only - not required (Page 3 of 4)

Plant: River Bend Station I Year: 2021 I Page 44 of 44 Annual Radiological Environmental Operating Report Attachment 3 Page 6 of 6 Table 22: ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TSE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value<*> Limits Value March 2021 MRAD-34 Water Am-241 pCi/L 175 157 108 - 201 A Fe-55 pCi/L 579 275 162 -400 N<1>

Pu-238 pCi/L 181 171 103 - 222 A Pu-239 pCi/L 153 142 87.9- 175 A Soil Sr-90 pCi/kg 6570 9190 2860 - 14,300 A AP Fe-55 pCi/filter 107 121 44.2 - 193 A U-234 pCi/filter 25.99 25.5 18.9 - 29.9 A U-238 pCi/filter 24.7 25.3 19.1 - 30.2 A April 2021 RAD-125 Water Ba-133 pCi/L 92.3 90.5 76.2 - 99.6 A Cs-134 pCi/L 62.9 70.5 57.5- 77.6 A Cs-137 pCi/L 161 168 151 - 187 A Co-60 pCi/L 22.5 20.9 17.7 - 25.8 A Zn-65 pCi/L 183 177.0 159 - 208 A GR-A pCi/L 30.8 30.2 15.4 - 39.4 A GR-8 pCi/L 60.1 67.5 46.8 - 74.2 A U-Nat pCi/L 36.45 36.9 30.0 -40.8 A H-3 pCi/L 13,400 14,600 12,800 - 16,100 A Sr-89 pCi/L 64.5 63.5 51.4-71.5 A Sr-90 pCi/L 22.8 23.0 16.5-27.0 A 1-131 pCi/L 28.2 26.7 22.2 - 31.4 A September 2021 MRAD-35 Water Am-241 pCi/L 68 63.7 43.7-81.5 A Fe-55 pCi/L 179 246 145 - 358 A Pu-238 pCi/L 102 114 68.5 - 148 A Pu-239 pCi/L 32 34.3 21.2 - 42.3 A Soil Sr-90 pCi/kg 6160 6090 1,900 - 9,490 A AP Fe-55 pCi/filter 493 548 200 - 874 A Pu-238 pCi/filter 28 28.5 21.5 - 35.0 A Pu-239 pCi/filter 21 21.6 16.1 -26.1 A U-234 pCi/filter 7.95 7.76 5.75 - 9.09 A U-238 pCi/filter 8.0 7.69 5.81-9.17 A October 2021 RAD-127 Water Ba-133 pCi/L 82.8 87.5 73.6 - 96.2 A Cs-134 pCi/L 64.0 70.1 57.1 - 77.1 A Cs-137 pCi/L 145 156 140 - 174 A Co-60 pCi/L 83.2 85.9 77.3 - 96.8 A Zn-65 pCi/L 133 145 130-171 A GR-A pCi/L 76.0 66.7 35.0 - 82.5 A GR-B pCi/L 63.0 55.7 38.1 - 62.6 . N<2J U-Nat pCi/L 52.88 55.5 45.3-61.1 A H-3 pCi/L 13,800 17,200 15,000 - 18,900 NC3l Sr-89 pCi/L 54.9 61.0 49.1 - 68.9 A Sr-90 pCi/L 24.8 29.3 21.3 - 34.0 A 1-131 pCi/L 27.4 26.4 21.9-31.1 A December 2021 QR 120121Y Water GR-B pCi/L 47.6 39.8 26.4 - 47.3 NC4l H-3 pCi/L 17,500 17,800 15,600 - 19,600 A (a) The ERA known value is equal to 100% of/he 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 21-01 (2) See NCR 21-10 (3) See NCR 21-11 (4) See NCR 21-14 (Page 4 of 4)

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