RBG-48020, Annual Radiological Environmental Operating Report

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Annual Radiological Environmental Operating Report
ML20121A284
Person / Time
Site: River Bend Entergy icon.png
Issue date: 04/30/2020
From: Schenk T
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RBG-48020
Download: ML20121A284 (45)
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Text

Entergy Operations, Inc.

River Bend Station 5485 U.S. Highway 61N St. Francisville, LA 70775 Tel 225-381-4177 Tim Schenk Manager-Regulatory Assurance RBG-48020 April 30, 2020 Attn: Document Control Desk U. S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2738

Subject:

2019 Annual Radiological Environmental Operating Report River Bend Station - Unit 1 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, 2019 through December 31, 2019. 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, Digitally signed by Tim Schenk Tim Schenk Date: 2020.04.30 13:36:02

-05'00' Tim Schenk TAS/tf

Enclosure:

2019 Annual Radiological Environmental Operating Report cc: NRC Region IV Regional Administrator, w/o Enclosure NRC Senior Resident Inspector - River Bend Station, Unit 1 Ji Young Wiley, Department of Environmental Quality, Office of Environmental Compliance, Radiological Emergency Planning and Response Section Public Utility Commission of Texas, Attn: PUC Filing Clerk NRC Project Manager

Enclosure 2019 Annual Radiological Environmental Operating Report

Page 1 of 43 Plant: River Bend Station YEAR: 2019 Document Number: RBG-48016 Annual Radiological Environmental Operating Report

Plant: River Bend Station Year: 2019 Page 2 of 43 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 ..............................................................................................................7 2.3 Land Use Census..................................................................................................................7 3.0 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS ......................8 4.0 INTERPRETATION AND TRENDS OF RESULTS ....................................................................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 4.4.1 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 Interlaboratory Comparison Results ....................................................................................22 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

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

Plant: River Bend Station Year: 2019 Page 3 of 43 Annual Radiological Environmental Operating Report ATTACHMENTS - Sample Deviations ........................................................................................................26 - Monitoring Results Tables ............................................................................................27 - Interlaboratory Comparison Program Results ...............................................................38 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 - 2018 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............................................................................................27 Table 9: Radioiodine Cartridge Data Table ...............................................................................28 Table 10: Thermoluminescent Dosimeters - Indicators..............................................................29 Table 11: Thermoluminescent Dosimeters - Special Interest Areas ..........................................30 Table 12: Thermoluminescent Dosimeters - Controls ................................................................30 Table 13: Surface Water - Gamma............................................................................................31 Table 14: Surface Water - Tritium .............................................................................................32 Table 15: Groundwater - Gamma ..............................................................................................33 Table 16: Groundwater - Tritum ................................................................................................34 Table 17: Sediment - Gamma ...................................................................................................35 Table 18: Fish - Gamma............................................................................................................36 Table 19: Food Products - Gamma ...........................................................................................37 Table 20: Analytics Environmental Radioactivity Cross Check Program....................................40 Table 21: DOE's Mixed Analyte Performance Evaluation Program (MAPEP) ............................42 Table 22: ERA Environmental Radioactivity Cross Check Program ..........................................43

Plant: River Bend Station Year: 2019 Page 4 of 43 Annual Radiological 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 (2019)...........................................................................17 Figure 5: TLD Indicator Results (2019) Versus Control Data (1986-2019).................................18

Plant: River Bend Station Year: 2019 Page 5 of 43 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, 2019. 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 2019, 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 2019 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 stations 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 2019, 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 2019 data showed radioactivity levels in the environment were undetectable in many locations and near background levels in significant pathways.

1.2 Reporting Levels No samples equaled or exceeded reporting levels.

Plant: River Bend Station Year: 2019 Page 6 of 43 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 2019, environmental sampling was performed for seven media types addressed in the ODCM and for direct radiation. A total of 336 samples of the 336 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 Year: 2019 Page 7 of 43 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 2019 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 2020.

Section 4.5 on the report contains a narrative on the results of the 2018 land use census.

Plant: River Bend Station Year: 2019 Page 8 of 43 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 965; 0.4 km south of Activity 2 samples from close to the 2 SITE Continuous sampler operation
  • Radioiodine Canisters - I-131 analysis every two Center.

BOUNDARY locations, in different sectors, of with sample collection every two weeks.

the highest calculated annual average ground

  • AP1 (0.9 km WNW) - Behind weeks, or more frequently if level D/Q. River Bend Station Activity required by dust loading.
  • Air Particulate - Gross beta radioactivity analysis Center. following filter change.

RADIOIODINE AND PARTICULATES

  • AQS2 (5.8 km NW) - St. Francis Continuous sampler operation
  • Radioiodine Canisters - I-131 analysis every two Substation on US Hwy. (Bus.) with sample collection every two weeks.

1 sample from the vicinity of a community weeks, or more frequently if 61 in St. Francisville.

having the highest calculated annual average required by dust loading.

  • Air Particulate - Gross beta radioactivity analysis ground level D/Q. following filter change.

RADIOIODINE AND PARTICULATES

  • AGC (17.0 km SE) - Entergy Continuous sampler operation
  • Radioiodine Canisters - I-131 analysis every two Service Center compound in with sample collection every two weeks.

1 sample from a control location, as for weeks, or more frequently if Zachary. (Control) example 15 - 30 km distance and in the least required by dust loading.

  • Air Particulate - Gross beta radioactivity analysis prevalent wind direction. following filter change.

Plant: River Bend Station Year: 2019 Page 9 of 43 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

  • TA1 (1.7 km N) - River Bend Training Center.

One ring of stations, one in each Quarterly

  • mR exposure quarterly.

meteorological sector in the general area of

  • TB1 (0.5 km NNE) - Utility pole near the SITE BOUNDARY. River Bend Station cooling tower yard 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 Year: 2019 Page 10 of 43 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

  • 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.

  • TL1 (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: 2019 Page 11 of 43 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

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

of US Hwy. 61 and LA Hwy. 421, 7.9 The balance of the stations (8) to be placed in Quarterly

  • mR exposure quarterly.

km north of Bains. (Control) special interest areas such as population centers, nearby residences, schools, and in 1

  • TCS (12.3 km NE) - Utility pole at or 2 areas to serve as control locations. 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 Year: 2019 Page 12 of 43 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

  • Gamma isotopic analysis and tritium analysis liquid discharge outfall, near LA Hwy.

10 ferry crossing. quarterly.

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.

Semiannually

  • Gamma isotopic and tritium analysis semiannually.

Samples from 1 or 2 sources only if likely to

  • WD (470 m SW) - Upland Terrace be affected.

Aquifer well downgradient from plant.

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: 2019 Page 13 of 43 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
  • Currently, no available milking animals Quarterly when animals are Gamma isotopic and I-131 analysis quarterly when milking animals within 8 km distant where within 8 km of RBS. on pasture. 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.

  • FU (4.0 km WSW) - One sample of a
  • 1 sample of similar species in area not 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 broadleaf Quarterly during the growing Gamma isotopic and I-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

  • GQC (32.0 km NW) - One sample of sampling is not performed. similar vegetables from LA State Penitentiary at Angola. (Control)
  • 1 sample of similar broadleaf vegetation grown 15 - 30 km distant, if milk sampling is not performed.

Plant: River Bend Station Year: 2019 Page 14 of 43 Annual Radiological Environmental Operating Report Figure 1: Exposure Pathway

Plant: River Bend Station Year: 2019 Page 15 of 43 Annual Radiological Environmental Operating Report Figure 2: Sample Collection Sites - Near Field

Plant: River Bend Station Year: 2019 Page 16 of 43 Annual Radiological Environmental Operating Report Figure 3: Sample Collection Sites - Far Field

Plant: River Bend Station Year: 2019 Page 17 of 43 Annual Radiological Environmental Operating Report 4.0 INTERPRETATION AND TRENDS OF RESULTS 4.1 Air Particulate and Radioiodine Sample Results In 2019 there were no samples above the LLD for I-131. Indicator gross beta air particulate results for 2019 were comparable to results obtained from 2009-2018 of the operational REMP. Also, the 2019 gross beta annual average was less than the average for preoperational levels. Results are reported as annual average picocuries per cubic meter (pCi/m3).

Monitoring Period Result 2009 - 2018 (Minimum Value) 0.018 2019 Average Value 0.017 2009 - 2018 (Maximum Value) 0.026 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. The gross beta results in September and October samples of 2019 are higher than typical due to planned maintenance outages causing low volumes. Therefore, it can be concluded that the airborne pathway continues to be unaffected by River Bend Station operations.

FIGURE 4 Gross Beta Indicator Results (2019) 0.0500 0.0400 pCi/cubic meter 0.0300 0.0200 0.0100 0.0000 01/01/19 02/01/19 03/01/19 04/01/19 05/01/19 06/01/19 07/01/19 08/01/19 09/01/19 10/01/19 11/01/19 12/01/19 01/01/20 AN1 AP1 AQS2

Plant: River Bend Station Year: 2019 Page 18 of 43 Annual Radiological Environmental Operating 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 Stations 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 2019 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 (2019) Versus Control Data (1986-2019) 20.00 18.00 16.00 14.00 m R/Qtr 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 Locations

+3-sigma Control sigma Control 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr 4.3 Waterborne Sample Results Analytical results for 2019 surface water and groundwater water samples were similar to those reported in previous years. Gamma radionuclides and tritium analytical results for 2019 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 Year: 2019 Page 19 of 43 Annual Radiological 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 2019.

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 2019.

4.3.3 Sediment Sample Results Sediment samples were collected from one indicator and one control location in 2019 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 2019, 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 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 2019, food products samples were collected when available from one indicator and one control location and analyzed for gamma radionuclides. The 2019 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 Year: 2019 Page 20 of 43 Annual Radiological Environmental Operating Report 4.4.3 Milk Sample Results In 2019 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 2018) 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 one change. A new resident, located at a distance of 1.7 km in Sector A, was identified in 2018. This occupied residence is 0.2 km closer to the site than the residence reported in previous census. There were no changes in the milk cows or food products in 2018.

Plant: River Bend Station Year: 2019 Page 21 of 43 Annual Radiological Environmental Operating Report Table 5: Land Use Census -2018 Nearest Residence And Milk Animal Within Five Miles Nearest Range Range Sector Direction Nearest Milk Animal Comment Residence (Unit) (Unit)

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

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

- - 2 St. Francisville, LA 70775 1.5 D ENE 12657 Powell Station Rd.

- - 2 St. Francisville, LA 70775 1.4 E E 4635 Hwy 61

- - 2 St. Francisville, LA 70775 2.4 F ESE 12019 Fairview Way

- - 2 Jackson, LA 70748 2.6 G SE 3319 Hwy 964

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

- - 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 Hwy 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 Year: 2019 Page 22 of 43 Annual Radiological Environmental Operating Report 4.6 Interlaboratory Comparison Results Attachment 3 contains result summary for Interlaboratory Comparison program for Teledyne Brown Engineering to fulfill the requirements of River Bend Stations 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 2019 REMP program.

Plant: River Bend Station Year: 2019 Page 23 of 43 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)(3)

LLD (2)

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

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

GB / 108 0.01 0.0175 (81 / 81) AGC 0.0183 (27 / 27) 0.0183 (27 / 27) 0 Air Particulates [0.008 - 0.047] (17.0 km SE) [0.011 - 0.045] [0.011 - 0.045]

(pCi/m3)

Airborne Iodine I-131 / 108 0.07 < LLD N/A N/A < LLD 0 (pCi/m3)

Indicator TLDs Gamma / 64 (6) 13.3 (64 / 64) TG1 15.7 (4 / 4) N/A 0 (mR/Qtr) [9.9 - 16.6] (1.6 km SE) [14.6 - 16.6]

Special Interest Gamma / 24 (6) 13.9 (24 / 24) TGS 15.4 (4 / 4) N/A 0 TLDs (mR/Qtr) [12.0 - 16.3] (17.0 km SE) [14.8 - 16.3]

Control TLDs Gamma / 8 (6) N/A TAC 15.1 (4 / 4) 14.5 (8 / 8) 0 (mR/Qtr) (15.8 km N) [14.2-16.4] [12.9 - 16.4]

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 N/A 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 I-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 60 < LLD N/A N/A < LLD 0 La-140 15 < LLD N/A N/A < LLD 0

Plant: River Bend Station Year: 2019 Page 24 of 43 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)(3)

LLD (2)

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

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

H-3 / 4 700 < LLD N/A N/A < LLD 0 GS / 4 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 N/A N/A < LLD 0 Groundwater Zn-65 30 < LLD N/A N/A < LLD 0 (pCi/L)

Nb-95 15 < LLD N/A N/A < LLD 0 I-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 60 < LLD N/A N/A < LLD 0 La-140 15 < LLD N/A N/A < LLD 0

Plant: River Bend Station Year: 2019 Page 25 of 43 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)(3)

LLD (2)

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

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

GS / 2 Sediment Cs-134 150 < LLD N/A N/A < LLD 0 (pCi/kg dry)

Cs-137 180 < LLD N/A N/A < LLD 0 GS / 2 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 / 8 Food Products I-131 60 < LLD N/A N/A < LLD 0 (pCi/kg wet) Cs-134 60 < LLD N/A N/A < LLD 0 Cs-137 80 < LLD N/A N/A < LLD 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 River Bend Station TRM.

(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) direction 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 River Bend Station TRM.

Plant: River Bend Station Year: 2019 Page 26 of 43 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 Environmental air samplers at location AR1 indicated a loss of power for Air approximately 6 days 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> and 44 minutes. The power outage was due to 1 AR1 07/01/19 Power Outage Sample a faulty GFCI outlet. Sample volumes are sufficient to meet lower limit of detection requirements. (CR-RBS-2019-4964)

Environmental air sampler at location AR1 indicated a loss of power for approximately 2 days, 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and 48 minutes on 07/22/19. The air sampler Air 2 AR1 07/22/19 Power Outage was operating normally at the time of sample collection. The sample volume is Sample sufficient to meet the lower limit of detection requirements. (CR-RBS-2020-01351)

Sample volume indication for Radiological Environmental Monitoring Program (REMP) air sampler at location AP1 was low for the last sampling period.

Troubleshooting indicates that the issue is not with the calibrated flow Air Faulty 3 AP1 08/05/19 electronics, but with the air sample pump thermal protection circuitry. The air Sample Equipment pump was replaced with a functional unit and the air sampler was returned to service. Sample volume was sufficient to meet lower limit of detection requirements. (CR-RBS-2019-5341)

Environmental air sampler locations AP1, AQ1, AR1, and AN1 were short 7.9 AP1, hours during the sample period from 9/16/19 thru 9/30/19 due to planned Air AQ1, 4 09/30/19 Power Outage maintenance outages on Grant Substation. Samplers were operating normally Sample AR1, at time of sample collection. The sample volume is sufficient to meet the lower AN1 limit of detection requirements. (CR-RBS-2019-6322)

Environmental air sampler locations AN1, AP1, AQ1, and AR1 were short 3.75 AP1, hours during the sample period from 10/14/19 thru 10/28/19 due to planned Air AQ1, 5 10/28/19 Power Outage maintenance outages on Grant Substation. Samplers were operating normally Sample AR1, at time of sample collection. The sample volume is sufficient to meet the lower AN1 limit of detection requirements. (CR-RBS-2019-6901)

Plant: River Bend Station Year: 2019 Page 27 of 43 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 (1) AGC Start Date End Date (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD 0.01 0.01 0.01 0.01 12/26/2018 01/08/2019 0.017 0.016 0.014 0.016 01/08/2019 01/22/2019 0.016 0.018 0.016 0.017 01/22/2019 02/04/2019 0.018 0.016 0.017 0.018 02/04/2019 02/18/2019 0.013 0.017 0.014 0.017 02/18/2019 03/04/2019 0.011 0.010 0.010 0.011 03/04/2019 03/18/2019 0.014 0.017 0.016 0.017 03/18/2019 04/01/2019 0.019 0.022 0.021 0.023 04/01/2019 04/15/2019 0.012 0.013 0.013 0.012 04/15/2019 04/29/2019 0.017 0.018 0.018 0.020 04/29/2019 05/13/2019 0.013 0.014 0.014 0.015 05/13/2019 05/27/2019 0.021 0.020 0.024 0.023 05/27/2019 06/10/2019 0.020 0.018 0.018 0.019 06/10/2019 06/24/2019 0.015 0.015 0.016 0.016 06/24/2019 07/08/2019 0.015 0.015 0.015 0.014 07/08/2019 07/22/2019 0.008 0.010 0.010 0.011 07/22/2019 08/05/2019 0.016 0.018 0.019 0.016 08/05/2019 08/19/2019 0.013 0.012 0.013 0.013 08/19/2019 09/03/2019 0.016 0.016 0.015 0.017 09/03/2019 09/16/2019 0.042 0.040 0.047 0.045 09/16/2019 09/30/2019 0.016 0.018 0.017 0.018 09/30/2019 10/14/2019 0.021 0.021 0.022 0.023 10/14/2019 10/28/2019 0.017 0.012 0.015 0.015 10/28/2019 11/11/2019 0.026 0.020 0.027 0.025 11/11/2019 11/25/2019 0.020 0.023 0.023 0.021 11/25/2019 12/09/2019 0.020 0.020 0.019 0.020 12/09/2019 12/23/2019 0.018 0.017 0.023 0.020 12/23/2019 01/06/2020 0.010 0.012 0.013 0.014 (1)

Station with highest annual mean.

Plant: River Bend Station Year: 2019 Page 28 of 43 Annual Radiological Environmental Operating Report Attachment 2 Page 2 of 11 Monitoring Results Tables Table 9: Radioiodine Cartridge Data Table 3

Analysis: I-131 Units: pCi/m AN1 AP1 AQS2 AGC Start Date End Date (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD 0.07 0.07 0.07 0.07 12/26/2018 01/08/2019 < 0.013 < 0.013 < 0.017 < 0.017 01/08/2019 01/22/2019 < 0.013 < 0.014 < 0.016 < 0.017 01/22/2019 02/04/2019 < 0.014 < 0.014 < 0.017 < 0.017 02/04/2019 02/18/2019 < 0.018 < 0.019 < 0.016 < 0.017 02/18/2019 03/04/2019 < 0.013 < 0.013 < 0.008 < 0.019 03/04/2019 03/18/2019 < 0.024 < 0.024 < 0.021 < 0.021 03/18/2019 04/01/2019 < 0.005 < 0.012 < 0.014 < 0.014 04/01/2019 04/15/2019 < 0.021 < 0.021 < 0.013 < 0.013 04/15/2019 04/29/2019 < 0.009 < 0.009 < 0.015 < 0.015 04/29/2019 05/13/2019 < 0.024 < 0.024 < 0.014 < 0.014 05/13/2019 05/27/2019 < 0.012 < 0.011 < 0.018 < 0.018 05/27/2019 06/10/2019 < 0.014 < 0.013 < 0.020 < 0.020 06/10/2019 06/24/2019 < 0.020 < 0.018 < 0.008 < 0.009 06/24/2019 07/08/2019 < 0.010 < 0.010 < 0.019 < 0.008 07/08/2019 07/22/2019 < 0.017 < 0.017 < 0.017 < 0.017 07/22/2019 08/05/2019 < 0.010 < 0.016 < 0.008 < 0.024 08/05/2019 08/19/2019 < 0.016 < 0.009 < 0.016 < 0.017 08/19/2019 09/03/2019 < 0.009 < 0.018 < 0.018 < 0.007 09/03/2019 09/16/2019 < 0.010 < 0.010 < 0.023 < 0.023 09/16/2019 09/30/2019 < 0.022 < 0.022 < 0.021 < 0.008 09/30/2019 10/14/2019 < 0.011 < 0.008 < 0.018 < 0.019 10/14/2019 10/28/2019 < 0.006 < 0.015 < 0.015 < 0.013 10/28/2019 11/11/2019 < 0.023 < 0.023 < 0.010 < 0.005 11/11/2019 11/25/2019 < 0.012 < 0.012 < 0.010 < 0.009 11/25/2019 12/09/2019 < 0.012 < 0.014 < 0.014 < 0.008 12/09/2019 12/23/2019 < 0.010 < 0.010 < 0.005 < 0.009 12/23/2019 01/06/2020 < 0.008 < 0.016 < 0.016 < 0.014

Plant: River Bend Station Year: 2019 Page 29 of 43 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.

st nd rd th 1 Qtr 2 Qtr 3 Qtr 4 Qtr Annual Mean Station 2019 2019 2019 2019 2019 TA1 10.1 10.3 11.2 11.0 10.7 TB1 13.9 14.0 15.1 15.1 14.5 TC1 14.5 14.6 16.0 15.2 15.1 TD1 14.1 15.3 16.1 15.4 15.2 TE1 12.9 13.4 14.4 14.2 13.8 TF1 12.9 14.1 14.5 14.6 14.0 (1)

TG1 14.6 15.9 16.6 15.9 15.7 TH1 11.6 11.9 12.4 12.5 12.1 TJ1 12.0 13.4 13.5 13.3 13.0 TK1 13.2 14.0 14.1 14.9 14.1 TL1 13.4 14.2 14.6 13.9 14.0 TM1 11.2 12.0 12.3 12.5 12.0 TN1 13.3 14.2 14.9 14.2 14.2 TP1 11.9 13.1 13.2 13.5 12.9 TQ1 9.9 10.3 11.2 10.8 10.6 TR1 10.0 10.4 10.7 10.8 10.5 (1)

Indicator station with highest annual mean.

Plant: River Bend Station Year: 2019 Page 30 of 43 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.

st 1 Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2019 2019 2019 2019 2019 TCS 12.1 12.0 13.0 12.6 12.4 (1)

TGS 15.4 14.8 16.3 15.1 15.4 TNS 12.7 12.6 13.4 13.9 13.2 TRS 14.3 14.3 15.1 14.3 14.5 TQS1 14.0 15.4 16.0 15.8 15.3 TQS2 12.3 12.3 12.7 13.3 12.6 (1)

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 2019 2019 2019 2019 2019 (1)

TAC 14.2 15.4 16.4 14.5 15.1 TEC 12.9 13.5 14.5 14.3 13.8 (1)

Control station with highest annual mean.

Plant: River Bend Station Year: 2019 Page 31 of 43 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 I-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 02/25/2019 02/25/2019 < 6.55 < 6.48 < 13.4 < 7.02 < 13.9 < 6.01 < 14.0 < 14.1 < 5.16 < 5.96 < 26.5 < 10.1 (Indicator)

SWU 02/25/2019 02/25/2019 < 5.63 < 6.47 < 12.6 < 6.25 < 9.27 < 6.27 < 12.5 < 10.5 < 6.83 < 5.33 < 32.3 < 10.7 (Control)

SWD 06/11/2019 06/11/2019 < 5.03 < 3.82 < 8.69 < 5.61 < 9.66 < 5.08 < 6.55 < 7.62 < 5.73 < 4.79 < 20.5 < 6.72 (Indicator)

SWU 06/11/2019 06/11/2019 < 4.50 < 3.83 < 7.76 < 3.85 < 9.19 < 4.10 < 5.53 < 6.82 < 4.96 < 4.38 < 17.9 < 5.12 (Control)

SWD 09/09/2019 09/09/2019 < 5.72 < 6.48 < 12.0 < 5.75 < 12.4 < 6.89 < 9.19 < 9.08 < 6.11 < 4.97 < 19.3 < 7.93 (Indicator)

SWU 09/09/2019 09/09/2019 < 6.87 < 4.82 < 13.6 < 6.05 < 12.4 < 6.23 < 10.5 < 12.5 < 7.86 < 6.98 < 29.1 < 9.91 (Control)

SWD 11/11/2019 11/11/2019 < 4.41 < 4.58 < 11.4 < 5.11 < 8.26 < 4.84 < 14.2 < 8.19 < 5.18 < 4.84 < 35.8 < 10.0 (Indicator)

SWU 11/11/2019 11/11/2019 < 4.00 < 4.72 < 9.63 < 4.46 < 8.95 < 5.20 < 12.6 < 8.10 < 4.14 < 4.27 < 25.7 < 9.90 (Control)

Plant: River Bend Station Year: 2019 Page 32 of 43 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) 02/25/2019 02/25/2019 < 566 SWU (Control) 02/25/2019 02/25/2019 < 552 SWD (Indicator) 06/11/2019 06/11/2019 < 388 SWU (Control) 06/11/2019 06/11/2019 < 382 SWD (Indicator) 09/09/2019 09/09/2019 < 543 SWU (Control) 09/09/2019 09/09/2019 < 540 SWD (Indicator) 11/11/2019 11/11/2019 < 573 SWU (Control) 11/11/2019 11/11/2019 < 552

Plant: River Bend Station Year: 2019 Page 33 of 43 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 I-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) 05/27/2019 < 5.31 < 6.13 < 10.8 < 7.26 < 12.5 < 5.76 < 11.5 < 7.95 < 6.88 < 6.34 < 27.9 < 11.5 WU (Control) 05/27/2019 < 5.43 < 4.75 < 10.3 < 6.40 < 8.43 < 4.82 < 10.3 < 10.8 < 5.90 < 6.36 < 26.3 < 9.30 WD (Indicator) 11/18/2019 < 5.38 < 5.32 < 13.7 < 7.27 < 11.4 < 5.87 < 8.96 < 9.16 < 4.68 < 4.67 < 26.4 < 8.76 WU (Control) 11/11/2019 < 3.76 < 4.46 < 9.39 < 4.50 < 8.12 < 4.92 < 14.5 < 7.46 < 4.55 < 4.31 < 30.6 < 10.9

Plant: River Bend Station Year: 2019 Page 34 of 43 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 WD (Indicator) 05/27/2019 05/27/2019 < 570 WU (Control) 05/27/2019 05/27/2019 < 564 WD (Indicator) 11/18/2019 11/18/2019 < 569 WU (Control) 11/11/2019 11/11/2019 < 566

Plant: River Bend Station Year: 2019 Page 35 of 43 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 Collection Date Cs-134 Cs-137 REQUIRED LLD 150 180 SEDD (Indicator) 09/09/2019 < 58.68 < 43.73 SEDU (Control) 09/09/2019 < 89.94 < 82.33

Plant: River Bend Station Year: 2019 Page 36 of 43 Annual Radiological Environmental Operating Report Attachment 2 Page 10 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 09/09/2019 < 70.85 < 72.75 < 118.9 < 67.76 < 135.9 < 52.05 < 72.19 (Indicator)

FU 09/09/2019 < 48.89 < 41.20 < 102.2 < 47.63 < 102.7 < 42.37 < 55.17 (Control)

Plant: River Bend Station Year: 2019 Page 37 of 43 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 I-131 Cs-134 Cs-137 REQUIRED LLD 60 60 80 GN1 (Indicator) 02/25/2019 < 34.04 < 18.26 < 18.11 GQC (Control) 02/25/2019 < 38.81 < 23.78 < 23.42 GN1 (Indicator) 06/10/2019 < 23.09 < 17.49 < 16.32 GQC (Control) 06/11/2019 < 16.10 < 15.52 < 15.00 GN1 (Indicator) 09/04/2019 < 37.14 < 24.78 < 18.58 GQC (Control) 09/04/2019 < 23.92 < 17.47 < 15.16 GN1 (Indicator) 11/11/2019 < 48.54 < 21.23 < 18.94 GQC (Control) 11/11/2019 < 32.49 < 18.58 < 14.81

Plant: River Bend Station Year: 2019 Page 38 of 43 Annual Radiological Environmental Operating Report Attachment 3 Page 1 of 6 Interlaboratory Comparison Program Results 1.0 Summary For the Teledyne Brown Engineering (TBE) laboratory, 119 out of 129 analyses performed met the specified acceptance criteria. Ten analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program.

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 April 2019 water Cs-134 result was evaluated as Not Acceptable.

The reported value was 15.2 pCi/L (error 2.82 pCi/L) and the known result was 12.1 pCi/L (acceptance range of 8.39 - 14.4 pCi/L). With the error, the reported result overlaps the acceptable range. This sample was run as the workgroup duplicate on a different detector with a result of 10.7 pCi/L (within acceptable range). (NCR 19-10)

2. The ERA April 2019 water Sr-89 result was evaluated as Not Acceptable. The reported value was 44.9 pCi/L and the known result was 33.3 pCi/L (acceptance range of 24.5 - 40.1 pCi/L). The sample was only counted for 15 minutes instead of 200 minutes. The sample was re-prepped in duplicate and counted for 200 minutes with results of 30.7 +/- 5.37 pCi/L and 33.0 +/- 8.71 pCi/L.

This was the 1st high failure for Sr-89 in 5 years. (NCR 19-11)

3. The MAPEP February 2019 soil Sr-90 result was not submitted and therefore evaluated as Not Acceptable. The sample was run in duplicate, with results of -

1.32 +/- 4.09 Bq/kg (<6.87) and -1.030 +/- 3.55 Bq/kg (<5.97). The known result was a false positive test (no significant activity). TBE did not submit a result because it appeared that the results may not be accurate. TBE analyzed a substitute soil Sr-90 sample from another vendor, with a result within the acceptable range. (NCR 19-12)

4. The MAPEP February 2019 water Am-241 result was evaluated as Not Acceptable. The reported value was 0.764 +/- 0.00725 Bq/L with a known result of 0.582 Bq/L (acceptable range 0.407 - 0.757 Bq/L). TBEs result falls within the upper acceptable range with the error. It appeared that a non-radiological interference was added and lead to an increased mass and higher result. (NCR 19-13)
5. The MAPEP February 2019 vegetation Sr-90 result was evaluated as Not Acceptable. The reported result was -0.1060 +/- 0.0328 Bq/kg and the known result was a false positive test (no significant activity). TBEs result was correct in that there was no activity. MAPEPs evaluation was a statistical failure at 3 standard deviations. (NCR 19-14)

Plant: River Bend Station Year: 2019 Page 39 of 43 Annual Radiological Environmental Operating Report Page 2 of 6 Interlaboratory Comparison Program Results

6. The ERA October 2019 water Gross Alpha result was evaluated as Not Acceptable. TBEs reported result was 40.5 +/- 10.3 pCi/L and the known result was 27.6 pCi/L (ratio of TBE to known result at 135%). With the associated error, the result falls within the acceptable range (14.0 - 36.3 pCi/L). The sample was run as the workgroup duplicate on a different detector with a result of 30.8 +/- 9.17 pCi/L (within the acceptable range). This was the first failure for drinking water Gr-A since 2012. (NCR 19-23)
7. The ERA October 2019 water Sr-90 result was evaluated as Not Acceptable.

TBEs reported result was 32.5 +/- 2.12 pCi/L and the known result was 26.5 pCi/L (ratio of TBE to known result at 123%). With the associated error, the result falls within the acceptable range (19.2 - 30.9 pCi/L). The sample was run as the workgroup duplicate on a different detector with a result of 20.0 +/-

1.91 pCi/L (within the acceptable range). Both TBE results are within internal QC limits. A substitute quick response sample was analyzed with an acceptable result of 18.6 pCi/L (known range of 13.2 - 22.1 pCi/L). (NCR 19-24)

8. The MAPEP August 2019 soil Ni-63 result of 436 +/- 22.8 Bq/kg was evaluated as Not Acceptable. The known result was 629 Bq/kg (acceptable range 440 -

818 Bq/sample). With the associated error, the TBE result falls within the lower acceptance range. All associated QC was acceptable. No reason for failure could be found. This is the first failure for soil Ni-63 since 2012. (NCR 19-25).

9. The MAPEP August 2019 water Am-241 result was not reported and therefore evaluated as Not Acceptable. Initial review of the results showed a large peak where Am-241 should be (same as the February, 2019 sample results). It is believed that Th-228 was intentionally added as an interference. The sample was re-prepped and analyzed using a smaller sample aliquot. The unusual large peak (Th-228) was seen again and also this time a smaller peak (Am-241). The result was 436 +/- 22.8 Bq/L (acceptable range 0.365 +/- 0.679 Bq/L).

Th-228 is not a typical nuclide requested by clients, so there is no analytical purpose to take samples through an additional separation step. TBE will pursue using another vendor for Am-241 water cross-checks that more closely reflects actual customer samples. (NCR 19-26)

10. The Analytics September 2019 soil Cr-51 sample was evaluated as Not Acceptable. TBEs reported result of 0.765 +/- 0.135 pCi/g exceeded the upper acceptance range (140% of the known result of 0.547 pCi/g). The TBE result was within the acceptable range (0.63 - 0.90 pCi/g) with the associated error.

The Cr-51 result is very close to TBEs normal detection limit. In order to get a reportable result, the sample must be counted for 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> (10x longer than client samples). There is no client or regulatory requirement for this nuclide and TBE will remove Cr-51 from the reported gamma nuclides going forward.

(NCR 19-27)

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 Year: 2019 Page 40 of 43 Annual Radiological Environmental Operating Report Attachment 3 Page 3 of 6 Table 20: Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to (b)

Month/Year Matrix Nuclide Units Reported (a) Evaluation Number Value Analytics Result Value March 2019 E12468A Milk Sr-89 pCi/L 87.1 96 0.91 A Sr-90 pCi/L 12.6 12.6 1.00 A E12469A Milk Ce-141 pCi/L 113 117 0.97 A Co-58 pCi/L 153 143 1.07 A Co-60 pCi/L 289 299 0.97 A Cr-51 pCi/L 233 293 0.80 A Cs-134 pCi/L 147 160 0.92 A Cs-137 pCi/L 193 196 0.98 A Fe-59 pCi/L 153 159 0.96 A I-131 pCi/L 91.5 89.5 1.02 A Mn-54 pCi/L 149 143 1.04 A Zn-65 pCi/L 209 220 0.95 A E12470 Charcoal I-131 pCi 77.5 75.2 1.03 A E12471 AP Ce-141 pCi 60.7 70.2 0.87 A Co-58 pCi 87.9 85.8 1.02 A Co-60 pCi 175 179 0.98 A Cr-51 pCi 165 176 0.94 A Cs-134 pCi 91.2 95.9 0.95 A Cs-137 pCi 120 118 1.02 A Fe-59 pCi 108 95.3 1.13 A Mn-54 pCi 94.2 85.7 1.10 A Zn-65 pCi 102 132 0.77 W E12472 Water Fe-55 pCi/L 2230 1920 1.16 A E12473 Soil Ce-141 pCi/g 0.189 0.183 1.03 A Co-58 pCi/g 0.209 0.224 0.93 A Co-60 pCi/g 0.481 0.466 1.03 A Cr-51 pCi/g 0.522 0.457 1.14 A Cs-134 pCi/g 0.218 0.250 0.87 A Cs-137 pCi/g 0.370 0.381 0.97 A Fe-59 pCi/g 0.263 0.248 1.06 A Mn-54 pCi/g 0.248 0.223 1.11 A Zn-65 pCi/g 0.371 0.344 1.08 A E12474 AP Sr-89 pCi 88.3 95.2 0.93 A Sr-90 pCi 11.7 12.5 0.94 A August 2019 E12562 Soil Sr-90 pCi/g 4.710 6.710 0.70 W (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: River Bend Station Year: 2019 Page 41 of 43 Annual Radiological Environmental Operating Report Attachment 3 Page 4 of 6 Table 20: Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to (b)

Month/Year Matrix Nuclide Units Reported (a) Evaluation Number Value Analytics Result Value September 2019 E12475 Milk Sr-89 pCi/L 70.0 93.9 0.75 W Sr-90 pCi/L 12.0 12.9 0.93 A E12476 Milk Ce-141 pCi/L 150 167 0.90 A Co-58 pCi/L 170 175 0.97 A Co-60 pCi/L 211 211 1.00 A Cr-51 pCi/L 323 331 0.98 A Cs-134 pCi/L 180 207 0.87 A Cs-137 pCi/L 147 151 0.97 A Fe-59 pCi/L 156 148 1.05 A I-131 pCi/L 81.1 92.1 0.88 A Mn-54 pCi/L 160 154 1.04 A Zn-65 pCi/L 303 293 1.03 A E12477 Charcoal I-131 pCi 95.9 95.1 1.01 A E12478 AP Ce-141 pCi 129 138 0.93 A Co-58 pCi 128 145 0.88 A Co-60 pCi 181 174 1.04 A Cr-51 pCi 292 274 1.07 A Cs-134 pCi 166 171 0.97 A Cs-137 pCi 115 125 0.92 A Fe-59 pCi 119 123 0.97 A Mn-54 pCi 129 128 1.01 A Zn-65 pCi 230 242 0.95 A E12479 Water Fe-55 pCi/L 1810 1850 0.98 A E12480 Soil Ce-141 pCi/g 0.305 0.276 1.10 A Co-58 pCi/g 0.270 0.289 0.93 A Co-60 pCi/g 0.358 0.348 1.03 A Cr-51 pCi/g 0.765 0.547 1.40 N(1)

Cs-134 pCi/g 0.327 0.343 0.95 A Cs-137 pCi/g 0.308 0.321 0.96 A Fe-59 pCi/g 0.257 0.245 1.05 A Mn-54 pCi/g 0.274 0.255 1.07 A Zn-65 pCi/g 0.536 0.485 1.11 A E12481 AP Sr-89 pCi 95.9 91.9 1.04 A Sr-90 pCi 12.3 12.6 0.97 A E12563 Soil Sr-90 pCi/g 0.392 0.360 1.09 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 19-27 (Page 2 of 4)

Plant: River Bend Station Year: 2019 Page 42 of 43 Annual Radiological Environmental Operating Report Attachment 3 Page 5 of 6 Table 21: 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 2019 19-GrF40 AP Gross Alpha Bq/sample 0.184 0.528 0.158 - 0.898 A Gross Beta Bq/sample 0.785 0.948 0.474 - 1.422 A 19-MaS40 Soil Ni-63 Bq/kg 420 519.0 363 - 675 A Sr-90 Bq/kg (1) NR(3) 19-MaW40 Water Am-241 Bq/L 0.764 0.582 0.407 - 0.757 N(4)

Ni-63 Bq/L 4.72 5.8 4.1 - 7.5 A Pu-238 Bq/L 0.443 0.451 0.316 - 0.586 A Pu-239/240 Bq/L -0.00161 0.0045 (2) A 19-RdF40 AP U-234/233 Bq/sample 0.1138 0.106 0.074 - 0.138 A U-238 Bq/sample 0.107 0.110 0.077 - 0.143 A 19-RdV40 Vegetation Cs-134 Bq/sample 2.14 2.44 1.71 - 3.17 A Cs-137 Bq/sample 2.22 2.30 1.61 - 2.99 A Co-57 Bq/sample 2.16 2.07 1.45 - 2.69 A Co-60 Bq/sample 0.02382 (1) A Mn-54 Bq/sample -0.03607 (1) A Sr-90 Bq/sample -0.1060 (1) N(5)

Zn-65 Bq/sample 1.35 1.71 1.20 - 2.22 W August 2019 19-GrF41 AP Gross Alpha Bq/sample 0.192 0.528 0.158 - 0.898 W Gross Beta Bq/sample 0.722 0.937 0.469 - 1.406 A 19-MaS41 Soil Ni-63 Bq/kg 436 629 440 - 818 N(6)

Sr-90 Bq/kg 444 572 400 - 744 W 19-MaW41 Water Am-241 Bq/L NR(7)

Ni-63 Bq/L 7.28 9.7 6.8 - 12.6 W Pu-238 Bq/L 0.0207 0.0063 (2) A Pu-239/240 Bq/L 0.741 0.727 0.509 - 0.945 A 19-RdF41 AP U-234/233 Bq/sample 0.0966 0.093 0.065 - 0.121 A U-238 Bq/sample 0.0852 0.096 0.067-0.125 A 19-RdV41 Vegetation Cs-134 Bq/sample 0.0197 (1) A Cs-137 Bq/sample 3.21 3.28 2.30 - 4.26 A Co-57 Bq/sample 4.62 4.57 3.20 - 5.94 A Co-60 Bq/sample 4.88 5.30 3.71 - 6.89 A Mn-54 Bq/sample 4.54 4.49 3.14 - 5.84 A Sr-90 Bq/sample 0.889 1.00 0.70 - 1.30 A Zn-65 Bq/sample 2.78 2.85 2.00 - 3.71 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) See NCR 19-12 (4) See NCR 19-13 (5) See NCR 19-14 (6) See NCR 19-25 (Page 3 of 4)

(7) See NCR 19-26

Plant: River Bend Station Year: 2019 Page 43 of 43 Annual Radiological Environmental Operating Report Attachment 3 Page 6 of 6 Table 22: ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Limits Value April 2019 Rad-117 Water Ba-133 pCi/L 26.3 24.1 18.6 - 27.8 A Cs-134 pCi/L 15.2 12.1 8.39 - 14.4 N(1)

Cs-137 pCi/L 33.6 33.1 28.8 - 39.4 A Co-60 pCi/L 11.9 11.5 8.67 - 15.5 A Zn-65 pCi/L 87.1 89.2 80.3 - 107 A GR-A pCi/L 19 19.3 9.56 - 26.5 A GR-B pCi/L 20.2 29.9 19.1 - 37.7 A U-Nat pCi/L 55.5 55.9 45.6 - 61.5 A H-3 pCi/L 21500 21400 18700 - 23500 A (2)

Sr-89 pCi/L 44.9 33.3 24.5 - 40.1 N Sr-90 pCi/L 24.5 26.3 19.0 - 30.7 A I-131 pCi/L 28.9 28.4 23.6 - 33.3 A October 2019 Rad-119 Water Ba-133 pCi/L 42.7 43.8 35.7 - 48.8 A Cs-134 pCi/L 53.5 55.9 45.2 - 61.5 A Cs-137 pCi/L 77.7 78.7 70.8 - 89.2 A Co-60 pCi/L 51.5 53.4 48.1 - 61.3 A Zn-65 pCi/L 36.6 34.0 28.5 - 43.1 A GR-A pCi/L 40.5 27.6 14.0 - 36.3 N(3)

GR-B pCi/L 36.3 39.8 26.4 - 47.3 A U-Nat pCi/L 27.66 28.0 22.6 - 31.1 A H-3 pCi/L 22800 23400 20500 - 25700 A Sr-89 pCi/L 47.1 45.5 35.4 - 52.7 A Sr-90 pCi/L 32.5 26.5 19.2 - 30.9 N(4)

I-131 pCi/L 26.0 23.9 19.8 - 28.4 A December 2019 QR 120419D Water Sr-90 pCi/L 20.1 18.6 13.2 - 22.1 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 19-10 (2) See NCR 19-11 (3) See NCR 19-23 (4) See NCR 19-24 (Page 4 of 4)

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