Text

Radioactive Effluent Release Report
	ML21110A153
Person / Time
Site:	South Texas, 07201041
Issue date:	04/19/2021
From:	Hoffman J; South Texas
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
	35155451, NOC-AE-21003800
	Download: ML21110A153 (143)
	v • d • e

......

Nuclear Operating Company llllJ Ill.-

South Jex;Js Project Electrfc Generating Station P.Q Box 289 Wadsworth, li:xas 7748)

April 19, 2021 NOC-AE-21003800 10 CFR 50.36a STl: 35155451 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 South Texas Project Units 1 & 2 Docket Nos. 50-498; 50-499; 72-1041 2020 Radioactive Effluent Release Report Pursuant to the South Texas Project Technical Specification 6.9.1.4 and 10 CFR 50.36a, STP Nuclear Operating Company provides the attached 2020 Radioactive Effluent Release Report.

The report covers the period from January 1, 2020 to December 31 , 2020.

There are no commitments included in this report.

IOhere are any questions on this report, please contact me at (361) 972-7158, or N. Boehmisch at (361) 972-8172.

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/J~hnHo~

Manager, Chemistry NB

Attachment:

2020 Radioactive Effluent Release Report cc:

Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 1600 E. Lamar Boulevard Arlington , TX 76011-4511

Effluent Release Repor~

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2020 Radioactive Effluent Release Report SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Completed by Generation in accordance with Technical Specifications for United States Nuclear Regulatory Commission Renewed Facility Operating License Nos.

NPF-76 & NPF-80 April 2021 Authored by: Iain Duncanson Consulting Chemist Chemistry Division Technical Review: James Wirths, IV Consulting Chemist Chemistry Division Approved by:

J0 hn HOffm a n*.*. Digitally signed by John Hoffman Date: 2021.04.15 10:48:30 -05'00' John Hoffman Manager Chemistry Division OPGP03ZX0007, Preparation of the Radioactive Effluent Release Report South Texas Identification (STI): 35114653

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Table of Contents Table of Contents PAGE Summary Tab Report Summary and Introduction........................................................................................................ 1-1 Effluent Program Tab Supplemental Information for Effluent and Waste Disposal ............................................................... 2-1 Regulatory Limits Effluent Concentrations Limits Average Energy (Million Electron Volts/Disintegration)

Measurement and Approximations of Total Activity Batch Releases Abnormal (Unplanned) Releases Estimate of Total Error Solid Waste Shipments Radiological Impact on Man Meteorological Data Lower Limit of Detection Dose to Members of the Public Technical Specifications and Offsite Dose Calculation Manual Controls Reporting Requirements............................................................................................................................................ 3-1 Offsite Dose Calculation Manual Changes Annual Land Use Census Radioactive Waste Treatment System Design Modification Description Inoperable Effluent Monitoring Instrumentation Explanation Gas Storage Tank Curie Limit Violation Description Unprotected Outdoor Tank Curie Limit Violation Description Abnormal (Unplanned) Release Description Radioactive Waste Process Control Program Changes Independent Spent Fuel Storage Installation (ISFSI)

Radiological Data Tab Gaseous Effluents ..................................................................................................................................... 4-1 Liquid Effluents ....................................................................................................................................... 5-1 Solid Waste and Irradiated Fuel Shipments.......................................................................................... 6-1 i

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Table of Contents Table of Contents PAGE Dose Data Tab Dose Accumulations ................................................................................................................................. 7-1 Results of the Direct Radiation Measurements Program ..................................................................... 8-1 Meteorological Data Tab Joint Frequency Tables ........................................................................................................................... 9-1 Joint Frequency Tables for First Quarter Joint Frequency Tables for Second Quarter Joint Frequency Tables for Third Quarter Joint Frequency Tables for Fourth Quarter Joint Frequency Tables for First Quarter Batch Release Joint Frequency Tables for Second Quarter Batch Release Joint Frequency Tables for Third Quarter Batch Release Joint Frequency Tables for Fourth Quarter Batch Release ii

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Summary Tab Summary Tab

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Summary and Introduction Report Summary During 2020, as in previous years, operation ofthe South Texas Project (STP) created no adverse effects or health risks. The maximum radiation exposure calculated for a hypothetical person living at the boundary of STP during 2020 due to operation ofSTP was less than one millirem. For reference, this dose may be compared to the average annual radiation exposure of 620 millirem to people in the United States from all sources, as shown in Figure 1-1. Of that 620 millirem, natural radiation sources in the environment accounted for 50% of the radiation exposure, whilst 48% of the exposure occurredfrom medicalprocedures. Nuclear power operations contributed less than one millirem.

Figure 1-1 All Exposure Cate(lories Collective Effective Dose (percent), 2006 nl!Klon & ' h gron (battiground) (37 %)

Com putcKi ttlmogl':ilphy (medlc;aq (i 4 %)

l m1Brventiooal fluorosoopy (medical) (7 %)

NCRP (2006). National Council on Radiation Protection and Measurements, Ionizing Radiation Exposure of the Population of the United States, (Bethesda, Maryland), NCRP Report No. 160.

During 2020, the estimated total body dose to a hypothetical Member of the Public with the highest probability for exposure from radioactive effluents and direct radiation was 0.017 millirem. This total represents approximately 0.1 % of the limits of 40 CFR 190. Based on our 2020 Land Use Census, real individuals reside in the West by Southwest Sector, approximately 4,000 meters (2.5 miles) from the site. For dose calculation purposes, the residents at this location are characterized as the theoretically highest exposed individual with regard to food consumption, occupancy and other uses of the areas in the plant vicinity. Our dose model assumes that this theoretically highest exposed individual may consume the 1-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Summary and Introduction maximum amount of food with all the food being grown or grazed at the residence. This individual receives shoreline exposure from Little Robbins Slough for 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months per year and consumes 21 kilograms (46 pounds) of fish taken from Little Robbins Slough. This individual receives a submersion dose from noble gases and dose from inhaled radioactive particulates, radioiodines, carbon-14, and tritium. This hypothetical adult is assumed to consume 64 kilograms (140 pounds) of leafy vegetables grown at the residence and consumes 110 kilograms (240 pounds) of meat from livestock grazed at the residence. This estimated total body dose is calculated using models and exposure pathways described in our Offsite Dose Calculation Manual for a hypothetical individual offsite. Other dose estimates for Members of the Public onsite are listed in the report using exposure pathways not addressed by standard dose calculation methods.

Doses from releases to the environment at STP have historically been and continue to be well below regulatory limits, as shown in Figure 1-2. Carbon-14 accounted for a majority of the Total Body Dose reported in gaseous effluents. Members of the Public received negligible additional radiation due to the operation of STP. This Radioactive Effluent Release Report summarizes the data describing the radioactive liquid and gaseous releases from STP during 2020. The radioactive effluents from STP are effectively monitored and controlled in accordance with regulatory requirements.

FIGURE 1-2 lHEORETICAL lOlAL BODY DOSE FOR ALL PATHWAYS

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YEAR Liquid and gaseous discharges from STP are continuously monitored for radioactive content.

Samples are also collected from ventilation systems and liquid discharges and analyzed for radioactivity. The sample and analysis methods are verified and augmented using an environmental laboratory. Radioactivity monitors continuously sample the ventilation exhaust systems. On the liquid discharge lines, radioactivity monitors automatically divert or isolate liquid effluents if the radioactivity is higher than expected. These monitors are also equipped with remote alarm indications in the control rooms and health physics offices.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Summary and Introduction Prior to and during power operation, STP is required to evaluate radioactive material in the environment. We are committed to sampling and analyzing environmental samples for radioactivity to support our Radiological Environmental Monitoring Program (REMP). The results of these environmental samples are listed in our 2020 Annual Environmental Operating Report. These environmental measurements affirm the accuracy of our sampling and analysis program, a subset of our Radioactive Effluent Control Program. These measurements are categorized into four pathways. The sampled pathways include airborne, waterborne, ingestion, and direct radiation. Based on these environmental measurements and the radioactivity released to the environment (included in this report), STP continues to operate with no negative effect on the population or the environment.

The radiation monitors and the sampling and analysis program, provide an accurate determination of the type and quantity of radioactive materials released in plant effluents.

Liquid effluents are directed to the Main Cooling Reservoir (MCR) that is located entirely within the site boundary. STP continues to aggressively pursue the reduction of radioactive material in liquid effluents consistent with prudent industry practices.

Each year, the effluent monitoring results are summarized in this report and a hypothetical radiation dose to the population in the surrounding area is calculated based on gaseous radioactive effluents, meteorological conditions and liquid radioactive effluents. The hypothetical dose assumes credible paths for radioactive material to reach a Member of the Public, such as consumption of leafy vegetables from a garden, fish from the river, inhalation and direct exposure. The highest potential hypothetical dose to an individual at the site boundary was calculated to be less than one millirem or approximately an additional day of radiation exposure from natural radiation sources. The information presented in this report demonstrates that plant operation is consistently controlled to make certain that radioactive effluents remain below regulatory limits and to ensure protection of the public and the environment.

INTRODUCTION This Radioactive Effluent Release Report is submitted for the period January 1, 2020, through December 31, 2020, in accordance with Appendix A of Renewed Facility Operating License Nos. NPF-76 and NPF-80, Technical Specifications and the Offsite Dose Calculation Manual.

A single submittal is made for both units combining those sections that are common. Separate tables of releases and release totals are included where separate processing systems exist.

This report includes an annual summary of hourly meteorological measurements taken during each quarter. This data appears as tables of wind direction and wind speed by atmospheric stability class. All assessments of radiation doses are performed in accordance with the Offsite Dose Calculation Manual.

Minimal quantities of radioactivity were released during 2020. Liquid effluents are discharged to the onsite Main Cooling Reservoir and subsequently released offsite. The radioactivity released in liquids beyond the site boundary was estimated using the Offsite Dose Calculation Manual. Solid radioactive waste is shipped offsite for disposal. Table 1-1 lists a brief summary of the radioactive effluents and solid waste attributable to the station.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Summary and Introduction Table 1-1 TYPE OF EFFLUENT TYPE DESTINATION VOLUME CUBIC CURIES RADIOACTIVE METER MATERIAL NOBLE GAS GAS OFFSITE 5.1E+09 (2) 5.0E+00 PARTICULATE AND GAS OFFSITE 5.1E+09 (2) 1.2E-03 IODINES TRITIUM &

GAS OFFSITE 5.1E+09 (2) 1.5E+02 CARBON-14 TRITIUM LIQUID OFFSITE 4.8E+06(3) 2.1E+02(5)

FISSION AND ACTIVATION LIQUID OFFSITE 4.8E+06(3) 6.9E-05(5)

PRODUCTS TRITIUM LIQUID ON-SITE 5.9E+04(4) 1.6E+03 FISSION AND ACTIVATION LIQUID ON-SITE 5.9E+04(4) 6.3E-03 PRODUCTS(1)

SPENT RESINS AND SOLID FOR DISPOSAL 2.6E+01 2.8E+02 FILTERS DRY COMPRESSIBLE SOLID FOR DISPOSAL 4.3E+02 1.6E+00 WASTE Other (Large Components and SOLID FOR DISPOSAL 2.6E+01 4.3E-02 Associated Commodities)

Low Level Exempt Quantities of sewage SOLID FOR DISPOSAL 6.0E+01 2.0E-05 sludge and resin (1)

Excludes dissolved and entrained gases.

(2)

Unit Vent Release Volume for Units 1 and 2.

(3)

Estimated MCR seepage to identified receptors.

(4)

Total volume of liquid radioactive effluents discharged to the MCR.

(5)

Reference ODCM, Table B4-1 for Matagorda Bay.

Tritium was the largest contributor to the offsite doses from radioactive liquid effluents.

The offsite doses are well below any regulatory limit and significantly less than the average annual radiation exposure to people in the United States from all sources (620 millirem),

from NCRP (2006). National Council on Radiation Protection and Measurements, Ionizing Radiation Exposure of the Population of the United States, (Bethesda, Maryland), NCRP Report No. 160.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Effluent Program Tab Effluent Program Tab

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Supplemental Information for Effluent and Waste Disposal 2-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Supplemental Information for Effluent and Waste Disposal The South Texas Project is located on 12,220 acres in Matagorda County, Texas, approximately 15 miles southwest of Bay City along the west bank of the Colorado River. The South Texas Project is owned by NRG South Texas LP, City of Austin, and City Public Service Board of San Antonio as tenants in common. Houston Lighting & Power Company was the original project manager of the South Texas Project and was responsible for the engineering, design, licensing, construction, startup, and initial commercial operation of the two-unit facility. In 1997, the STP Nuclear Operating Company assumed operational control of the South Texas Project and responsibility for implementation of associated environmental programs.

The South Texas Project has two Westinghouse pressurized water reactors. The rated core thermal power of each unit is 3,853 megawatts-thermal (MWt). Each unit was originally designed for a net electrical power output of 1,250 megawatts-electric (MWe). Unit 1 received a low-power testing license on August 21, 1987, achieved initial criticality on March 8, 1988, and was declared commercially operational on August 25, 1988. Unit 2 received a low-power testing license on December 16, 1988, achieved initial criticality on March 12, 1989, and was declared commercially operational on June 19, 1989. On September 28, 2017, the United States Nuclear Regulatory Commission approved the South Texas Projects request to extend the operating licenses an additional twenty years through 2047 and 2048.

The combined units currently produce enough electricity to serve more than two million homes and businesses throughout Texas. With approximately 1,100 baseline employees, the STP Nuclear Operating Company is the largest employer and source of revenue for Matagorda County. Nuclear energy continues to provide long-term cost stability and promote energy independence. It is our nation's largest source of carbon-free energy. As we work collectively to secure our state's long-term energy future, nuclear energy will continue to play an important role as a safe and reliable supply of clean baseload electricity.

Regulatory Limits Fission and Activation Gases The air dose due to noble gases released in gaseous effluents, from each unit, to areas at and beyond the Site Boundary shall be limited to the following:

During any calendar quarter: Less than or equal to 5 millirads for gamma radiation and less than or equal to 10 millirads for beta radiation, and During any calendar year: Less than or equal to 10 millirads for gamma radiation and less than or equal to 20 millirads for beta radiation.

Iodines and Particulates, Half-Lives > 8 days The dose to a Member of the Public from iodine-131, iodine-133, tritium, and all radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released, from each unit, to areas at and beyond the Site Boundary shall be limited to the following:

During any calendar quarter: Less than or equal to 7.5 millirems to any organ; and During any calendar year: Less than or equal to 15 millirems to any organ.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Liquid Effluents The dose or dose commitment to a Member of the Public from radioactive materials in liquid effluents released, from each unit, to Unrestricted Areas shall be limited to:

During any calendar quarter: Less than or equal to 1.5 millirems to the whole body and to less than or equal to 5 millirems to any organ; and During any calendar year: Less than or equal to 3 millirems to the whole body and to less than or equal to 10 millirems to any organ.

Effluent Concentrations Limits Gaseous Effluents The dose rate due to radioactive materials released in gaseous effluents from the site to areas at and beyond the Site Boundary shall be limited to the following:

For noble gases: Less than or equal to 500 millirems/year to the whole body and less than or equal to 3000 millirems/year to the skin, and For Iodine-131, Iodine-133, tritium and all radionuclides in particulate form with half-lives greater than eight days: Less than or equal to 1500 millirems/year to any organ.

Liquid Effluents The concentration of radioactive material released in liquid effluents to Unrestricted Areas shall be limited to 10 times the concentrations specified in 10CFR, Part 20, Appendix B, Table II, Column 2, for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.0E-04 microcurie/milliliter total activity.

Average Energy (Million Electron Volts/Disintegration)

The Average Energy (or E-bar) shall be the average (weighted in proportion to the concentration of each radionuclide in the reactor coolant at the time of sampling) of the sum of the average beta and gamma energies per disintegration for the isotopes, other than Iodines, with half-lives greater than 15 minutes, making up at least 95% of the total non-iodine activity in the coolant. The following average energy values are based on grab sample analyses from each reactor coolant system. The Unit 1 sample was collected during the month of July 2020 and the Unit 2 sample was collected during the month of February 2020.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Reactor Coolant Liquid including tritium, fission products (excluding radioiodines), and corrosion and activation products E-bar (Million Electron Volts/Disintegration) 0.083 Unit 1 0.083 Unit 2 The average energy (E-bar) values of the radionuclide mixture in gaseous releases of fission and activation gases are based on noble gases released during the reporting period.

Gaseous Effluents only Noble Gases E-bar (Million Electron Volts/Disintegration) 1.07 Unit 1 0.80 Unit 2 Measurement and Approximations of Total Activity The following discussions detail the methods used to measure and approximate total activity for the following:

Gaseous Effluents: Fission and Activation Gases, Tritium, Iodines and Particulates Liquid Effluents: Fission and Activation Products, Tritium, Dissolved and Entrained Gases Tables A3-1 and A4-1 of the Offsite Dose Calculation Manual give sampling frequencies and lower limit of detection requirements for the analysis of liquid and gaseous effluent streams.

Gaseous Effluents Analytical Methods for Gaseous Releases from the Reactor Containment Building Monthly pre-release grab samples are collected from the plant Reactor Containment Building atmosphere. These samples are analyzed on a Gamma Spectroscopy System utilizing high purity germanium detectors for noble gas, iodine and particulate activity. Tritium specific radioactivity is measured using Liquid Scintillation Counting techniques.

The radionuclide concentrations obtained are used in conjunction with the gross noble gas release rate monitoring data collected by the radiation monitoring system to estimate the release rate of each radionuclide in the effluent streams. The noble gas release rate data collected by the unit vent radiation monitor is quantified and reported as continuous mode of release. The data from the unit vent radiation monitor in conjunction with the grab sample results of the Reactor Containment Building atmosphere are used to quantify the radioactive material released.

Analytical Methods For Continuous Gaseous Releases Periodic noble gas and tritium grab samples are taken from the continuous release points such as the Unit Vent. Continuous sampling for particulates and iodine is also performed on effluent streams. These samples are analyzed for tritium and gamma radionuclides, as described above 2-4

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal for gaseous releases. Strontium-89, strontium-90, and gross alpha analyses is performed by the on-site Radiological Services Laboratory.

Noble gas quantification is performed by the plant radiation monitoring system using noble gas grab sample results and the gross noble gas release rate monitor.

The methodology used for estimating the quantity of carbon-14 released to the environment is described in the following section Dose to Member of the Public from Radioactive Effluents Including Carbon-14.

Secondary system liquid grab samples in conjunction with the mass of the secondary coolant lost are used for quantifying secondary steam releases. The radioactive material in the steam is based on grab sample results of the secondary liquid. The secondary liquid is analyzed for gamma emitters and tritium.

Liquid Effluents Analytical Methods For Liquid Releases Liquid batch releases include waste liquid treated by the liquid waste processing system and secondary system chemical regeneration waste. Liquid effluents resulting from primary to secondary leakage or other plant operations are continuously monitored and are tracked as continuous releases. For batch releases, representative pre-release grab samples are taken and analyzed in accordance with Table A3-1 of the Offsite Dose Calculation Manual. For continuous releases, representative samples are collected weekly and analyzed. Radionuclide analyses are performed using a Gamma Spectroscopy System. Aliquots of each pre-release batch sample are composited in accordance with the requirements in Table A3-1 of the Offsite Dose Calculation Manual. Tritium concentrations are determined using Liquid Scintillation Counting techniques. Dissolved and entrained gas concentrations are determined by counting grab samples on the Gamma Spectroscopy System. Strontium-89, strontium-90, gross alpha, iron-55, and nickel-63 determinations are performed by the on-site Radiological Environmental Monitoring Laboratory. The radionuclide concentrations obtained are used with the total volume for each batch release.

Batch Releases Liquid and gaseous summaries are compiled from permits generated using a computer-based effluent management system and plant procedures. Liquid batch releases are accounted for by individual permits. Gaseous batch releases are accounted for by monthly permits and consist of reactor containment purges for the purpose of reducing radioactive material concentrations. Batch times represent the actual period of releases and the periods that the purge valves were open.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Liquid (Unit 1)

Liquid (Unit 1) Quarter 1 Quarter 2 Quarter 3 Quarter 4

a. Number of batch releases 27 14 8 9

b. Total time period for batch releases (minutes) 1639 869 495 542

c. Maximum time period for a batch release (minutes) 65 67 66 63

d. Average time period for batch releases (minutes) 61 62 62 60

e. Minimum time period for a batch release (minutes) 57 53 54 55 Gaseous (Unit 1)

Gaseous (Unit 1) Quarter 1 Quarter 2 Quarter 3 Quarter 4

a. Number of batch releases 3 2 0 0

b. Total time period for batch releases (minutes) 15840 8760 0 0

c. Maximum time period for a batch release (minutes) 6060 7020 0 0

d. Average time period for batch releases (minutes) 5280 4380 0 0

e. Minimum time period for a batch release (minutes) 3840 1740 0 0 Liquid (Unit 2)

Liquid (Unit 2) Quarter 1 Quarter 2 Quarter 3 Quarter 4

a. Number of batch releases 4 3 12 21

b. Total time period for batch releases (minutes) 242 180 729 1247

c. Maximum time period for a batch release (minutes) 62 60 65 64

d. Average time period for batch releases (minutes) 61 60 61 59

e. Minimum time period for a batch release (minutes) 59 60 46 42 2-6

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Gaseous (Unit 2)

Gaseous (Unit 2) Quarter 1 Quarter 2 Quarter 3 Quarter 4

a. Number of batch releases 0 0 0 0

b. Total time period for batch releases (minutes) 0 0 0 0

c. Maximum time period for a batch release (minutes) 0 0 0 0

d. Average time period for batch releases (minutes) 0 0 0 0

e. Minimum time period for a batch release (minutes) 0 0 0 0 Abnormal (Unplanned) Releases No abnormal releases occurred during this reporting period.

Estimate of Total Error Estimate of Error for Liquid Effluents The maximum error associated with volume and flow measurements, based upon plant calibration practice, is estimated to be + 1.27%. The error associated with the flow measurement is small in relation to the counting uncertainty of the radionuclide concentration analysis.

The average uncertainty associated with counting measurements is 10% or less at the 95%

confidence interval.

The error associated with dilution volume is estimated to be + 10%.

Estimate of Error for Gaseous Effluents The maximum error associated with monitor readings, sample flow, vent flow, sample collection, monitor calibration and laboratory procedures are collectively estimated to be:

Fission and Activation Gases Low Activity (less than 10 microcurie per second) + 100%

Fission and Activation Gases High Activity (greater than or equal to 10 microcurie per second) + 20%

Iodines + 25%

Particulates + 25%

Tritium + 50%

The average uncertainty associated with counting measurements is 10% or less at the 95%

confidence interval for fission and activation gases, iodines, particulates and tritium.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Estimate of Error for Solid Radioactive Waste The potential error associated with solid radioactive waste shipments is estimated to be +/-

20%. This is based on waste stream sampling uncertainty and an industry standard of +/- 20%

for calibration of instrumentation.

Solid Waste Shipments A total of 18 shipments of radioactive filter media, spent resins, dry active waste, irradiated components and other wastes were made during the reporting period. Additionally, 3 shipments of exempt quantities were made to an industrial landfill in Texas. A summary of the data is provided in Section 6, Solid Waste and Irradiated Fuel Shipments. This data is based upon waste generated from Units 1 and 2.

Radiological Impact on Man The data for the period January 1, 2020, through December 31, 2020, is provided in the Dose Accumulation (Section 7) and the Summary of Direct Radiation Table 8-1 (Section 8). The following dilution factors and dilution water flows were used for assessing the radiation doses due to radioactive liquid effluents released to unrestricted areas.

Receptor Location ODCM(1) Dilution Water Flow Dilution Water Dilution Water Dilution Factor Cubic Feet/Second Flow Liters/Year Flow Liters/Quarter Colorado River 1.00E+00 6.00E+02 5.36E+11 1.34E+11 Matagorda Bay 1.63E+02 9.78E+04 8.73E+13 2.18E+13 Little Robbins 3.05E-02 1.83E+01 1.63E+10 4.08E+09 Slough Area (1)

Offsite Dose Calculation Manual factor (Table B4-3).

The dilution water flow used to estimate the individual dose due to ingestion of saltwater fish and saltwater invertebrates (shrimp) harvested from the Colorado River was 5.36E+11 liters per year for the years of 1989 through 2020. The dilution water flow used to estimate the individual dose due to ingestion of saltwater fish and saltwater invertebrates harvested from the Matagorda Bay was 8.73E+13 liters per year for the years of 1993 through 2020 as the result of a diversion channel that routes the Colorado River into Matagorda Bay. The dilution water flow used to estimate the individual dose due to ingestion of freshwater fish from the Little Robbins Slough Area was 1.63E+10 liters per year for the years 1989 through 2020. These dilution water flows were also used for estimating individual dose due to shoreline deposits. The radioactive material reported in the Liquid Effluent tables is the amount released to the Main Cooling Reservoir and does not contribute to dose until the radioactive material is released to unrestricted areas. In order to estimate the doses due to liquid effluents, the radioactive material reported must be adjusted by the values listed in the Offsite Dose Calculation Manual, Table B4-1, Radionuclide Fractions N(i), Reaching Off-site Bodies of Water.

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal Meteorological Data The 2020 meteorological data is presented in the form of joint frequency tables. Each quarter contains eight tables, one for each stability class and one for all classes combined.

A second set of joint frequency tables is provided for time periods when the reactor containment building fans were operating to remove radioactive material from the containment for personnel protection reasons. These containment purges are classified as batch releases.

Lower Limit of Detection The Lower Limit of Detection (an a priori limit) is defined as the smallest concentration of radioactive material in a sample that will yield a net count above system background that will be detected with 95% probability, and only a 5% probability of falsely concluding that a blank observation represents a "real" signal. A zero (0) value in the attached tables indicates no activity detected.

Dose to Member of the Public Dose to Member of the Public from Direct Radiation Outside the Site Boundary The Offsite Dose Calculation Manual includes the direct radiation from plant structures as a component to the dose to a hypothetical, highest exposed Member of the Public located off site due to plant operations. The Offsite Dose Calculation Manual allows measurements made near the plant structures to be used in these calculations following suitable adjustments for distance and exposure time. In 2020, Thermoluminescent Dosimeters (TLD) were placed along the protected area fence or the concrete intrusion barriers surrounding Units 1 and 2 of the South Texas Project, around the Old Steam Generator Storage Facility, Low Level Rad Waste Storage Area, and around the Independent Spent Fuel Storage Installation (ISFSI) pad as pictured in Figure 8-1 of Section 8. The results of these measurements are summarized in Table 8-1 of Section 8. The table shows that in 2020, TLD measurements were typical of previous years readings.

In accordance with the Offsite Dose Calculation Manual, the dose due to direct radiation can be estimated taking the highest TLD measurement, minus the background, and correcting for the distance to the site boundary using Dose direct = TLD * (PA)2 / (RD)2 Where TLD = background corrected TLD annual dose, mR/yr PA = distance from source of radiation to the TLD location, meters RD = distance from the source of radiation to the closest site boundary, meters 2-9

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal The TLD average dose rate is the average of the four quarterly values for the highest location less the quarterly average background at the site boundary. The highest average TLD dose rate was 26 mR/quarter for station #40 which is located in the vicinity of Independent Spent Fuel Storage Installation (ISFSI) Area, as shown in Figure 8-1. The value for TLD may be calculated as shown below where the historical site boundary background of 15.4 mR/quarter is used to find the net rate attributable to waste stored onsite.

TLD = 26 - 15.4 = 10.6 mR/quarter or TLD = (10.6 mR/quarter) * (4 quarters/yr) = 42.4 mrem/yr assuming a mR is about equal to a mrem The approximate distances PA and RD are estimated using field measurements and global positioning satellite technology. The total dose to a hypothetical member of the public at the site boundary could be calculated as below:

Dose direct = (42.4 mrem/yr) * (40 meters)2 / (1800 meters)2 = 0.021 mrem/yr This assumes someone is positioned permanently at the site boundary fence east of the Units.

A real person might traverse this area twice daily (to and from work) for a total exposure time of Exposure time (hypothetical person) = (250 work days per year) * (4 minutes per trip) *

(2 trips per day)

Exposure time (hypothetical person) = 2000 minutes = 0.00381 yr Dosedirect = 0.021 mrem/yr

0.00381 yr = 0.00008 mrem in 2020 In summary, a realistic dose of 0.00008 mrem was possible to a member of the public offsite in 2020 although a hypothetical maximum annual dose rate of 0.021 mrem/yr was calculated at the nearest offsite location.

Dose to Member of the Public from Direct Radiation Inside the Site Boundary A hypothetical Member of the Public inside the site boundary but outside the protected area fence could receive less than one millirem from direct radiation. The most exposed employee on site who is also a member of the public would be a grounds keeper whose job required him to work in the vicinity of the Independent Spent Fuel Storage Installation (ISFSI) Area. If such an individual worked 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months once a quarter at the fence where the dose rate was highest, their direct radiation dose could be calculated as follows:

Dose (mrem) = 40 * [(28-15.4)+(22-15.4)+(28-15.4)+(26-15.4)] / 365 / 24 = 0.19 mrem where 40 = 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months per quarter times four quarters 28 = average dose rate in first quarter, mrem/quarter 22 = average dose rate in second quarter, mrem/quarter 28 = average dose rate in third quarter, mrem/quarter 26 = average dose rate in fourth quarter, mrem/quarter 15.4 = average pre-operation dose rate, mrem/quarter 2-10

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal 365 = days in a year 24 = hours per day Hence, in 2020 a hypothetical member of the public with the highest exposure to direct radiation received about 0.19 mrem from direct radiation.

Dose to Member of the Public from Direct Radiation and Radioactive Effluents Inside the Site Boundary A hypothetical Member of the Public outside the protected area fence but inside the site boundary could receive approximately 0.50 millirem from radioactive effluents due to inhalation and immersion. This dose plus the direct radiation dose would yield 0.69 millirem, a small fraction of the 10 CFR 20.1301 annual limit.

Dose to Member of the Public from Radioactive Effluents Outside the Site Boundary using ODCM Exposure Pathways During 2020, the estimated total body dose to a hypothetical Member of the Public with the highest probability for exposure from radioactive effluents and direct radiation was 0.017 millirem. This total represents approximately 0.1% of the limits of 40 CFR 190. Based on our 2020 Land Use Census, real individuals reside in the West by Southwest Sector, approximately 4,000 meters (2.5 miles) from the site. For dose calculation purposes, the residents at this location are characterized as the theoretically highest exposed individual with regard to food consumption, occupancy, and other uses of the areas in the plant vicinity. Our dose model assumes that this theoretically highest exposed individual may consume the maximum amount of food with all the food being grown or grazed at the residence. This individual receives shoreline exposure from Little Robbins Slough for 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months per year and consumes 21 kilograms (46 pounds) of fish taken from Little Robbins Slough. This individual receives a submersion dose from noble gases and dose from inhaled radioactive particulates, radioiodines, carbon-14, and tritium. This hypothetical adult is assumed to consume 64 kilograms (140 pounds) of leafy vegetables grown at the residence and consumes 110 kilograms (240 pounds) of meat from livestock grazed at the residence. This estimated total body dose is calculated using models and exposure pathways described in our ODCM for a hypothetical individual offsite. Other dose estimates for Members of the Public onsite are listed in the report using exposure pathways not addressed by standard dose calculation methods.

Dose to Member of the Public from Radioactive Effluents Outside the Site Boundary using Liquid to Gaseous Receptor Exposure Pathways Consistent with normal operation of the units, approximately sixteen hundred Curies of tritium were released to the Main Cooling Reservoir during 2020. Since some portion of the tritium released in liquid effluents evaporates from the Main Cooling Reservoir, this section is included to provide an estimate of offsite dose from that gaseous source per section 4.10 of the ODCM. The Main Cooling Reservoir, with a surface area of about 28,300,000 square meters (7000 acres), is an area source and contributes tritium to the atmosphere. The atmospheric dispersion factor for the WSW sector at 4000 meters was estimated to be 4.01E-07 seconds per cubic meter using the EPA code Iclt3 and 2004 meteorological data.

2-11

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Supplemental Information for Effluent and Waste Disposal The product of X/Q, tritium released to the MCR, and the dose factor for a population age group (87.9, 91.7, 114.2 or 20.5 millirem-cubic meter per second-curie for age groups adult, teen, child and infant, respectively) generated an estimated whole body dose of 0.074 millirem for the highest exposed population group, a small fraction of the limits of 40 CFR 190.

Dose to Member of the Public from Radioactive Effluents including Carbon-14 Carbon-14 was reported as a radioactive effluent in 2010 for the first time. Carbon-14 is a naturally occurring isotope of carbon. Carbon-14 is formed naturally in the upper atmosphere and is also formed in an operating nuclear reactor, primarily through activation of oxygen molecules. The quantity of carbon-14 produced by operating nuclear reactors is significantly less than that produced naturally or from weapons testing.

The NRC published Regulatory Guide 1.21 Revision 1, Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants in 1974. This regulatory guidance recommends the content and format of this report. This report follows the recommendations of Regulatory Guide 1.21, Revision 1. In 2009 the NRC published revision 2 of Regulatory Guide 1.21 based on a risk-informed perspective for reporting principal radionuclides . This document recommended methods for estimating and reporting the quantity of carbon-14 released in gaseous effluents. The quantity of carbon-14 released from each unit was estimated using NUREG-0017, Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Pressurized Water Reactors PWR-GALE Code, April 1985. A value of 7.3 curies of carbon-14 was used for each unit. The Semiannual Summation of All Releases by Quarter for All Airborne Effluents found in section 4-2 of this report lists carbon-14 in a similar manner as tritium.

ODCM dose factors were used for estimating doses to Members of the Public and the doses due to carbon-14 are included in the Dose Accumulations, Section 7-1 of this report. EPRI Report TR-105715, Characterization of Carbon-14 Generated by the Nuclear Power Industry, November 1995 concluded that the molecular form of carbon-14 produced in gaseous effluent is 75 to 90 percent hydrocarbons (primarily methane) with the remainder in inorganic form (carbon dioxide or carbon monoxide in gas or carbonates in liquid). This report listed the measured molecular forms of carbon-14 in gaseous effluents from two U.S. and six German commercial pressurized water reactors. The average fraction of inorganic carbon-14 was determined to be 20 percent and the average organic fraction was determined to be 80 percent.

The pathway doses were calculated using the average ratio of 1:5 for ingestion pathways, as carbon in the form of hydrocarbons is not absorbed by plants. The radiation doses from STP to the public (including carbon-14) are much lower than regulatory limits and are a very small contributor to the total radiation dose the American public receives each year from natural and manmade sources.

2-12

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Technical Specifications and Offsite Dose Calculation Manual Controls Reporting Requirements Technical Specifications and Offsite Dose Calculation Manual Controls Reporting Requirements 3-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Technical Specifications and Offsite Dose Calculation Manual Controls Reporting Requirements Offsite Dose Calculation Manual Changes (reference, Technical Specifications, 6.13)

The ODCM was not revised since issuance of the 2019 Radioactive Effluent Release Report.

Annual Land Use Census (reference, Offsite Dose Calculation Manual Controls, 3.12.2.a)

The Land Use Census verified current nearest residents within five miles. No new residents or receptors were identified within five miles of the site.

Radioactive Waste Treatment System Design Modification Description (reference, Offsite Dose Calculation Manual Controls, 6.15)

A review of the work history for 2020 for the solid, liquid and gaseous waste processing systems revealed that no major modifications were installed on these systems in 2020.

Inoperable Effluent Monitoring Instrumentation Explanation (reference, Offsite Dose Calculation Manual Controls, 6.9.1.4)

For 2020, inoperable liquid and gaseous effluent monitoring instruments were corrected within the time specified in sections 3.3.3.10 and 3.3.3.11 of offsite dose calculation manual controls.

Gas Storage Tank Curie Limit Violation Description (reference, Offsite Dose Calculation Manual Controls, 6.9.1.4)

The Reactor Coolant System (RCS) Vacuum Degassing System was not used during this reporting period. Therefore, the quantity of radioactive material in the RCS Vacuum Degassing System Storage Tanks did not exceed the limits set forth in Section 3.11.2.6 of Technical Specifications.

Unprotected Outdoor Tank Curie Limit Violation Description (reference, Offsite Dose Calculation Manual Controls, 6.9.1.4)

There are no Unprotected Outdoor Tanks at South Texas Project. Therefore, the quantity of radioactive material in any unprotected outdoor tank did not exceed the limit set forth in Section 3.11.1.4 of Technical Specifications.

Abnormal (Unplanned) Release Description (reference, Offsite Dose Calculation Manual, 6.9.1.4)

No abnormal (unplanned) releases occurred during this reporting period.

Radioactive Waste Process Control Program Changes (reference, Technical Specifications, 6.13)

There were no changes made to the Radioactive Waste Process Control Program during this reporting period.

Independent Spent Fuel Storage Installation (ISFSI)

There are no radiological effluents released from the ISFSI. Direct dose from the ISFSI is documented in table 8-1 of this report.

3-2

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Radiological Data Tab Radiological Data Tab

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Radiological Data Tab Intentionally Left Blank

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents Gaseous Effluents 4-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 1 Starting: 1-Jan-2020 Ending: 30-Jun-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 1 QUARTER 2 ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 4.12E-01 3.00E-01 100

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 5.23E-02 3.82E-02

3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 5.45E-05 3.98E-05 B. RADIOIODINES

1. IODINE-131 CURIES 2.16E-06 5.32E-07 25

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 2.75E-07 6.77E-08

3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 6.88E-04 1.69E-04 C. PARTICULATES

1. PARTICULATES(HALF-CURIES 25 LIVES>8 DAYS) 8.98E-04 2.85E-04

2. AVERAGE RELEASE uCi/sec 1.14E-04 3.62E-05 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 3.81E-02 1.21E-02 (3.00E-01 uCi/sec)

4. GROSS ALPHA CURIES 25 RADIOACTIVITY 1.77E-07 3.37E-07 D. TRITIUM

1. TOTAL RELEASE CURIES 3.15E+01 8.48E+00 50

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 4.00E+00 1.08E+00

3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 2.22E-03 5.99E-04 E. CARBON-14

1. TOTAL RELEASE CURIES 1.82E+00 1.82E+00 None

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 2.31E-01 2.32E-01

3. PERCENT OF LIMIT (7.8E+03 uCi/sec) 2.96E-03 2.97E-03 4-2

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY Unit 1 REPORT CATEGORY: SEMIANNUAL AIRBORNE GROUND LEVEL CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: FISSION GASES, IODINES, AND PARTICULATES REPORTING PERIOD: QUARTER # 1 AND QUARTER # 2 YEAR 2020 CONTINUOUS MODE BATCH MODE NUCLIDES UNITS QUARTER 1 QUARTER 2 QUARTER 1 QUARTER 2 RELEASED FISSION GASES Argon-41 CURIES 2.45E-01 1.40E-01 9.89E-04 0.00E+00 Xenon-133 CURIES 1.45E-01 1.47E-01 2.06E-02 1.23E-02 TOTAL FOR PERIOD CURIES 3.90E-01 2.88E-01 2.15E-02 1.23E-02 IODINES Iodine-131 CURIES 6.81E-07 7.48E-08 1.48E-06 4.58E-07 Iodine-133 CURIES 6.13E-08 0.00E+00 2.70E-07 0.00E+00 TOTAL FOR PERIOD CURIES 7.43E-07 7.48E-08 1.75E-06 4.58E-07 PARTICULATES Beryllium-7 CURIES 3.47E-06 0.00E+00 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 3.96E-07 1.32E-07 Cobalt-58 CURIES 1.44E-05 5.61E-07 1.46E-04 4.67E-05 Cobalt-60 CURIES 4.67E-06 2.62E-07 5.68E-05 1.88E-05 Chromium-51 CURIES 2.30E-05 1.62E-06 5.15E-04 1.72E-04 Iron-59 CURIES 0.00E+00 0.00E+00 7.85E-06 2.62E-06 Mercury-203 CURIES 1.48E-09 5.74E-10 1.06E-08 4.24E-09 Manganese-54 CURIES 1.62E-08 6.28E-09 1.12E-05 3.74E-06 Niobium-95 CURIES 1.93E-06 2.56E-07 7.01E-05 2.35E-05 Antimony-124 CURIES 0.00E+00 0.00E+00 1.01E-06 3.35E-07 Selenium-75 CURIES 1.77E-07 1.12E-07 4.28E-07 2.14E-07 Tin-113 CURIES 0.00E+00 0.00E+00 3.81E-07 1.27E-07 Tin-117m CURIES 0.00E+00 0.00E+00 2.89E-07 9.62E-08 Zinc-65 CURIES 0.00E+00 0.00E+00 3.09E-06 1.03E-06 Zirconium-95 CURIES 0.00E+00 0.00E+00 3.77E-05 1.26E-05 TOTAL FOR PERIOD CURIES 4.76E-05 2.82E-06 8.50E-04 2.82E-04 OTHER Carbon-14 CURIES 1.59E+00 1.69E+00 2.25E-01 1.33E-01 Gross Alpha CURIES 1.77E-07 2.75E-07 0.00E+00 6.22E-08 Hydrogen-3 (Tritium) CURIES 2.83E+01 7.72E+00 3.14E+00 7.56E-01 TOTAL FOR PERIOD CURIES 2.99E+01 9.41E+00 3.37E+00 8.88E-01 4-3

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 1 Starting: 1-Jul-2020 Ending: 31-Dec-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 3 QUARTER 4 ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 3.58E-01 4.04E-01 100

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 4.51E-02 5.08E-02

3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 4.70E-05 5.29E-05 B. RADIOIODINES

1. IODINE-131 CURIES 0.00E+00 8.08E-09 25

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 0.00E+00 1.02E-09

3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 0.00E+00 2.54E-06 C. PARTICULATES

1. PARTICULATES(HALF-CURIES 25 LIVES>8 DAYS) 8.16E-07 3.53E-06

2. AVERAGE RELEASE uCi/sec 1.03E-07 4.44E-07 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 3.42E-05 1.48E-04 (3.00E-01 uCi/sec)

4. GROSS ALPHA CURIES 25 RADIOACTIVITY 0.00E+00 0.00E+00 D. TRITIUM

1. TOTAL RELEASE CURIES 1.27E+01 2.18E+01 50

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 1.60E+00 2.74E+00

3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 8.90E-04 1.52E-03 E. CARBON-14

1. TOTAL RELEASE CURIES 1.84E+00 1.84E+00 None

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 2.31E-01 2.31E-01

3. PERCENT OF LIMIT (7.8E+03 uCi/sec) 2.97E-03 2.97E-03 4-4

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY Unit 1 REPORT CATEGORY: SEMIANNUAL AIRBORNE GROUND LEVEL CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: FISSION GASES, IODINES, AND PARTICULATES REPORTING PERIOD: QUARTER # 3 AND QUARTER # 4 YEAR 2020 CONTINUOUS MODE BATCH MODE NUCLIDES UNITS QUARTER 3 QUARTER 4 QUARTER 3 QUARTER 4 RELEASED FISSION GASES Argon-41 CURIES 2.02E-01 2.45E-01 0.00E+00 0.00E+00 Xenon-133 CURIES 1.57E-01 1.59E-01 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 3.58E-01 4.04E-01 0.00E+00 0.00E+00 IODINES Iodine-131 CURIES 0.00E+00 8.08E-09 0.00E+00 0.00E+00 Iodine-133 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 0.00E+00 8.08E-09 0.00E+00 0.00E+00 PARTICULATES Beryllium-7 CURIES 0.00E+00 3.40E-06 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-58 CURIES 8.16E-07 1.29E-07 0.00E+00 0.00E+00 Cobalt-60 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Chromium-51 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iron-59 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Mercury-203 CURIES 0.00E+00 1.86E-09 0.00E+00 0.00E+00 Manganese-54 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Niobium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Antimony-124 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Selenium-75 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-113 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zinc-65 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zirconium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 8.16E-07 3.53E-06 0.00E+00 0.00E+00 OTHER Carbon-14 CURIES 1.84E+00 1.84E+00 0.00E+00 0.00E+00 Gross Alpha CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Hydrogen-3 (Tritium) CURIES 1.27E+01 2.18E+01 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 1.46E+01 2.36E+01 0.00E+00 0.00E+00 4-5

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 2 Starting: 1-Jan-2020 Ending: 30-Jun-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 1 QUARTER 2 ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 6.11E-01 1.25E+00 100

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 7.77E-02 1.59E-01

3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 8.09E-05 1.65E-04 B. RADIOIODINES

1. IODINE-131 CURIES 0.00E+00 0.00E+00 25

2. AVERAGE RELEASE uCi/sec 0.00E+00 0.00E+00 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 0.00E+00 0.00E+00 (4.00E-02 uCi/sec)

C. PARTICULATES

1. PARTICULATES(HALF-CURIES 25 LIVES>8 DAYS) 7.64E-06 5.98E-06

2. AVERAGE RELEASE uCi/sec 9.72E-07 7.61E-07 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 3.24E-04 2.54E-04 (3.00E-01 uCi/sec)

4. GROSS ALPHA CURIES 25 RADIOACTIVITY 0.00E+00 3.17E-07 D. TRITIUM

1. TOTAL RELEASE CURIES 1.35E+01 1.24E+01 50

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 1.71E+00 1.58E+00

3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 9.51E-04 8.78E-04 E. CARBON-14

1. TOTAL RELEASE CURIES 1.82E+00 1.82E+00 None

2. AVERAGE RELEASE uCi/sec 2.31E-01 2.31E-01 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 2.97E-03 2.97E-03 (7.8E+03 uCi/sec) 4-6

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY Unit 2 REPORT CATEGORY: SEMIANNUAL AIRBORNE GROUND LEVEL CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: FISSION GASES, IODINES, AND PARTICULATES REPORTING PERIOD: QUARTER # 1 AND QUARTER # 2 YEAR 2020 CONTINUOUS MODE BATCH MODE NUCLIDES UNITS QUARTER 1 QUARTER 2 QUARTER 1 QUARTER 2 RELEASED FISSION GASES Argon-41 CURIES 3.64E-01 3.42E-01 0.00E+00 0.00E+00 Xenon-133 CURIES 2.47E-01 9.04E-01 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 6.11E-01 1.25E+00 0.00E+00 0.00E+00 IODINES Iodine-131 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iodine-133 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 PARTICULATES Beryllium-7 CURIES 7.63E-06 5.98E-06 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-58 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-60 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Chromium-51 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iron-59 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Mercury-203 CURIES 2.54E-10 0.00E+00 0.00E+00 0.00E+00 Manganese-54 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Niobium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Antimony-124 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Selenium-75 CURIES 9.24E-09 8.92E-10 0.00E+00 0.00E+00 Tin-113 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zinc-65 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zirconium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 7.64E-06 5.98E-06 0.00E+00 0.00E+00 OTHER Carbon-14 CURIES 1.82E+00 1.82E+00 0.00E+00 0.00E+00 Gross Alpha CURIES 0.00E+00 3.17E-07 0.00E+00 0.00E+00 Hydrogen-3 (Tritium) CURIES 1.35E+01 1.24E+01 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 1.53E+01 1.42E+01 0.00E+00 0.00E+00 4-7

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 2 Starting: 1-Jul-2020 Ending: 31-Dec-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 3 QUARTER 4 ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 1.09E+00 5.58E-01 100

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 1.37E-01 7.02E-02

3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 1.43E-04 7.31E-05 B. RADIOIODINES

1. IODINE-131 CURIES 0.00E+00 0.00E+00 25

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 0.00E+00 0.00E+00

3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 0.00E+00 0.00E+00 C. PARTICULATES

1. PARTICULATES(HALF-CURIES 25 LIVES>8 DAYS) 0.00E+00 4.48E-06

2. AVERAGE RELEASE uCi/sec 0.00E+00 5.64E-07 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 0.00E+00 1.88E-04 (3.00E-01 uCi/sec)

4. GROSS ALPHA CURIES 25 RADIOACTIVITY 0.00E+00 1.87E-07 D. TRITIUM

1. TOTAL RELEASE CURIES 1.66E+01 2.24E+01 50

2. AVERAGE RELEASE uCi/sec RATE FOR PERIOD 2.08E+00 2.81E+00

3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 1.16E-03 1.56E-03 E. CARBON-14

1. TOTAL RELEASE CURIES 1.84E+00 1.84E+00 None

2. AVERAGE RELEASE uCi/sec 2.31E-01 2.31E-01 RATE FOR PERIOD

3. PERCENT OF LIMIT

% 2.97E-03 2.97E-03 (7.8E+03 uCi/sec) 4-8

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY Unit 2 REPORT CATEGORY: SEMIANNUAL AIRBORNE GROUND LEVEL CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: FISSION GASES, IODINES, AND PARTICULATES REPORTING PERIOD: QUARTER # 3 AND QUARTER # 4 YEAR 2020 CONTINUOUS MODE BATCH MODE NUCLIDES UNITS QUARTER 3 QUARTER 4 QUARTER 3 QUARTER 4 RELEASED FISSION GASES Argon-41 CURIES 3.38E-01 3.49E-01 0.00E+00 0.00E+00 Xenon-133 CURIES 7.53E-01 2.09E-01 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 1.09E+00 5.58E-01 0.00E+00 0.00E+00 IODINES Iodine-131 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iodine-133 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 PARTICULATES Beryllium-7 CURIES 0.00E+00 4.48E-06 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-58 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-60 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Chromium-51 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iron-59 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Mercury-203 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Manganese-54 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Niobium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Antimony-124 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Selenium-75 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-113 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zinc-65 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zirconium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 0.00E+00 4.48E-06 0.00E+00 0.00E+00 OTHER Carbon-14 CURIES 1.84E+00 1.84E+00 0.00E+00 0.00E+00 Gross Alpha CURIES 0.00E+00 1.87E-07 0.00E+00 0.00E+00 Hydrogen-3 (Tritium) CURIES 1.65E+01 2.24E+01 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 1.84E+01 2.42E+01 0.00E+00 0.00E+00 4-9

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Gaseous Effluents STP NUCLEAR OPERATING COMPANY Unit 1 plus 2 Total REPORT CATEGORY: ANNUAL AIRBORNE GROUND LEVEL RELEASES.

TOTALS FOR EACH NUCLIDE RELEASED. FOR ALL OF 2020 NUCLIDES UNIT 1 UNIT 2 TOTAL UNITS RELEASED 2020 2020 2020 FISSION GASES Argon-41 CURIES 8.33E-01 1.39E+00 2.23E+00 Xenon-133 CURIES 6.41E-01 2.11E+00 2.75E+00 TOTAL FOR PERIOD CURIES 1.47E+00 3.51E+00 4.98E+00 IODINES Iodine-131 CURIES 2.70E-06 0.00E+00 2.70E-06 Iodine-133 CURIES 3.31E-07 0.00E+00 3.31E-07 TOTAL FOR PERIOD CURIES 3.03E-06 0.00E+00 3.03E-06 PARTICULATES Beryllium-7 CURIES 6.87E-06 1.81E-05 2.50E-05 Cobalt-57 CURIES 5.28E-07 0.00E+00 5.28E-07 Cobalt-58 CURIES 2.09E-04 0.00E+00 2.09E-04 Cobalt-60 CURIES 8.05E-05 0.00E+00 8.05E-05 Chromium-51 CURIES 7.12E-04 0.00E+00 7.12E-04 Iron-59 CURIES 1.05E-05 0.00E+00 1.05E-05 Mercury-203 CURIES 1.88E-08 2.54E-10 1.90E-08 Manganese-54 CURIES 1.50E-05 0.00E+00 1.50E-05 Niobium-95 CURIES 9.58E-05 0.00E+00 9.58E-05 Antimony-124 CURIES 1.35E-06 0.00E+00 1.35E-06 Selenium-75 CURIES 9.31E-07 1.01E-08 9.41E-07 Tin-113 CURIES 5.08E-07 0.00E+00 5.08E-07 Tin-117m CURIES 3.85E-07 0.00E+00 3.85E-07 Zinc-65 CURIES 4.12E-06 0.00E+00 4.12E-06 Zirconium-95 CURIES 5.03E-05 0.00E+00 5.03E-05 TOTAL FOR PERIOD CURIES 1.19E-03 1.81E-05 1.20E-03 OTHER Carbon-14 CURIES 7.32E+00 7.32E+00 1.46E+01 Gross Alpha CURIES 5.14E-07 5.04E-07 1.02E-06 Hydrogen-3 (Tritium) CURIES 7.44E+01 6.48E+01 1.39E+02 TOTAL FOR PERIOD CURIES 8.18E+01 7.21E+01 1.54E+02 4-10

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents Liquid Effluents 5-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL LIQUID EFFLUENTS Unit: 1 Starting: 1-Jan-2020 Ending: 30-Jun-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 1 QUARTER 2 ERROR A. FISSION & ACTIVATION PRODUCTS

1. TOTAL RELEASE (NOT INCLUDING TRITIUM, GASES, CURIES 1.36E-03 4.64E-04 10 ALPHA)

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 6.44E-10 3.10E-10 PERIOD

3. PERCENT OF EC* LIMIT (FRACTIONAL)

% 8.48E-04 3.35E-04 B. TRITIUM

1. TOTAL RELEASE CURIES 5.97E+02 7.65E+01 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 2.83E-04 5.11E-05 PERIOD

3. % OF LIMIT (1.00E-02 uCi/mL) % 2.83E+00 5.11E-01 C. DISSOLVED AND ENTRAINED GASES

1. TOTAL RELEASE CURIES 1.08E-03 2.85E-05 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 5.09E-10 1.91E-11 PERIOD

3. PERCENT OF LIMIT (2.00E-04 uCi/mL)

% 2.54E-04 9.53E-06 D. GROSS ALPHA RADIOACTIVITY

1. TOTAL RELEASE CURIES 0.00E+00 0.00E+00 10 E. WASTE VOL RELEASED

1. TOTAL PRE-DILUTION VOLUME LITERS 9.78E+06 9.19E+06 1

2. BATCH PRE-DILUTION VOLUME LITERS 1.51E+06 7.97E+05 1 F. VOLUME OF DILUTION WATER USED**

LITERS 2.10E+09 1.49E+09 10

EC= Effluent Concentration

- Volume of dilution water used means the volume of water circulated through the main condenser during the actual time of release. Liquid effluent releases ultimately dilute into the volume of the onsite main cooling reservoir and then into offsite water bodies as described in Section 2, subsection Radiological Impact on Man of this report.

5-2

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY Unit 1 REPORT CATEGORY: SEMIANNUAL LIQUID CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: ALL RADIONUCLIDES REPORTING PERIOD: QUARTER # 1 AND QUARTER # 2 YEAR 2020 CONTINUOUS RELEASES BATCH RELEASES NUCLIDES UNITS QUARTER 1 QUARTER 2 QUARTER 1 QUARTER 2 RELEASED ALL NUCLIDES Silver-110m CURIES 0.00E+00 0.00E+00 6.92E-05 0.00E+00 Arsenic-76 CURIES 0.00E+00 0.00E+00 3.26E-05 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-58 CURIES 0.00E+00 0.00E+00 7.13E-05 1.86E-04 Cobalt-60 CURIES 0.00E+00 0.00E+00 4.66E-04 1.14E-04 Chromium-51 CURIES 0.00E+00 0.00E+00 2.44E-04 0.00E+00 Cesium-137 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iron-55 CURIES 0.00E+00 0.00E+00 3.70E-04 2.52E-05 Tritium CURIES 3.58E-02 1.08E-02 5.97E+02 7.64E+01 Manganese-54 CURIES 0.00E+00 0.00E+00 2.11E-06 4.59E-05 Niobium-95 CURIES 0.00E+00 0.00E+00 7.88E-06 0.00E+00 Nickel-63 CURIES 0.00E+00 0.00E+00 9.42E-05 9.25E-05 Antimony-124 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Antimony-125 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-113 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Strontium-92 CURIES 0.00E+00 0.00E+00 3.71E-06 0.00E+00 Xenon-133 CURIES 0.00E+00 0.00E+00 9.38E-04 2.85E-05 Xenon-135 CURIES 0.00E+00 0.00E+00 1.37E-04 0.00E+00 Zirconium-97 CURIES 0.00E+00 0.00E+00 5.27E-07 0.00E+00 TOTAL FOR PERIOD CURIES 3.58E-02 1.08E-02 5.97E+02 7.64E+01 5-3

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL LIQUID EFFLUENTS Unit: 1 Starting: 1-Jul-2020 Ending: 31-Dec-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 3 QUARTER 4 ERROR A. FISSION & ACTIVATION PRODUCTS

1. TOTAL RELEASE (NOT INCLUDING TRITIUM, CURIES 1.58E-04 1.15E-04 10 GASES, ALPHA)

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 1.85E-10 1.38E-10 PERIOD

3. PERCENT OF EC* LIMIT (FRACTIONAL)

% 1.39E-04 1.38E-05 B. TRITIUM

1. TOTAL RELEASE CURIES 7.54E+01 1.26E+02 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 8.81E-05 1.51E-04 PERIOD

3. % OF LIMIT (1.00E-02 uCi/mL) % 8.81E-01 1.51E+00 C. DISSOLVED AND ENTRAINED GASES

1. TOTAL RELEASE CURIES 0.00E+00 0.00E+00 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 0.00E+00 0.00E+00 PERIOD

3. PERCENT OF LIMIT (2.00E-04 uCi/mL)

% 0.00E+00 0.00E+00 D. GROSS ALPHA RADIOACTIVITY

1. TOTAL RELEASE CURIES 0.00E+00 0.00E+00 10 E. WASTE VOL RELEASED

1. TOTAL PRE-DILUTION VOLUME LITERS 8.71E+06 8.37E+06 1

2. BATCH PRE-DILUTION VOLUME LITERS 4.66E+05 5.06E+05 1 F. VOLUME OF DILUTION WATER USED**

LITERS 8.47E+08 8.24E+08 10

EC= Effluent Concentration

- Volume of dilution water used means the volume of water circulated through the main condenser during the actual time of release. Liquid effluent releases ultimately dilute into the volume of the onsite main cooling reservoir and then into offsite water bodies as described in Section 2, subsection Radiological Impact on Man of this report.

5-4

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY Unit 1 REPORT CATEGORY: SEMIANNUAL LIQUID CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: ALL RADIONUCLIDES REPORTING PERIOD: QUARTER # 3 AND QUARTER # 4 YEAR 2020 CONTINUOUS RELEASES BATCH RELEASES NUCLIDES UNITS QUARTER 3 QUARTER 4 QUARTER 3 QUARTER 4 RELEASED ALL NUCLIDES Silver-110m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Arsenic-76 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-58 CURIES 0.00E+00 0.00E+00 1.57E-05 0.00E+00 Cobalt-60 CURIES 0.00E+00 0.00E+00 2.98E-05 0.00E+00 Chromium-51 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cesium-137 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iron-55 CURIES 0.00E+00 0.00E+00 2.36E-06 1.02E-04 Tritium CURIES 2.00E-02 4.30E-02 7.54E+01 1.26E+02 Manganese-54 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Niobium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nickel-63 CURIES 0.00E+00 0.00E+00 1.11E-04 1.21E-05 Antimony-124 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Antimony-125 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-113 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Strontium-92 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Xenon-133 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Xenon-135 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zirconium-97 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 2.00E-02 4.30E-02 7.54E+01 1.26E+02 5-5

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL LIQUID EFFLUENTS Unit: 2 Starting: 1-Jan-2020 Ending: 30-Jun-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 1 QUARTER 2 ERROR A. FISSION & ACTIVATION PRODUCTS

1. TOTAL RELEASE (NOT INCLUDING TRITIUM, CURIES 1.47E-04 7.12E-04 10 GASES, ALPHA)

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 4.01E-10 2.27E-09 PERIOD

3. PERCENT OF EC* LIMIT (FRACTIONAL)

% 3.77E-04 2.36E-03 B. TRITIUM

1. TOTAL RELEASE CURIES 1.15E+01 1.59E+01 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 3.13E-05 5.07E-05 PERIOD

3. % OF LIMIT (1.00E-02 uCi/mL) % 3.13E-01 5.07E-01 C. DISSOLVED AND ENTRAINED GASES

1. TOTAL RELEASE CURIES 0.00E+00 0.00E+00 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 0.00E+00 0.00E+00 PERIOD

3. PERCENT OF LIMIT (2.00E-04 uCi/mL)

% 0.00E+00 0.00E+00 D. GROSS ALPHA RADIOACTIVITY

1. TOTAL RELEASE CURIES 0.00E+00 0.00E+00 10 E. WASTE VOL RELEASED

1. TOTAL PRE-DILUTION VOLUME LITERS 5.36E+06 5.16E+06 1

2. BATCH PRE-DILUTION VOLUME LITERS 2.25E+05 1.68E+05 1 F. VOLUME OF DILUTION WATER USED**

LITERS 3.62E+08 3.08E+08 10

EC= Effluent Concentration

- Volume of dilution water used means the volume of water circulated through the main condenser during the actual time of release. Liquid effluent releases ultimately dilute into the volume of the onsite main cooling reservoir and then into offsite water bodies as described in Section 2, subsection Radiological Impact on Man of this report.

5-6

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY Unit 2 REPORT CATEGORY: SEMIANNUAL LIQUID CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: ALL RADIONUCLIDES REPORTING PERIOD: QUARTER # 1 AND QUARTER # 2 YEAR 2020 CONTINUOUS RELEASES BATCH RELEASES NUCLIDES UNITS QUARTER 1 QUARTER 2 QUARTER 1 QUARTER 2 RELEASED ALL NUCLIDES Silver-110m CURIES 0.00E+00 0.00E+00 7.84E-06 8.86E-05 Arsenic-76 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-58 CURIES 0.00E+00 0.00E+00 1.66E-05 4.22E-05 Cobalt-60 CURIES 0.00E+00 0.00E+00 1.37E-05 1.50E-04 Chromium-51 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cesium-137 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Iron-55 CURIES 0.00E+00 0.00E+00 1.69E-05 3.11E-04 Tritium CURIES 2.20E-02 3.49E-02 1.15E+01 1.59E+01 Manganese-54 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Niobium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nickel-63 CURIES 0.00E+00 0.00E+00 8.97E-06 3.84E-05 Antimony-124 CURIES 0.00E+00 0.00E+00 3.76E-05 5.73E-06 Antimony-125 CURIES 0.00E+00 0.00E+00 4.48E-05 7.58E-05 Tin-113 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Strontium-92 CURIES 0.00E+00 0.00E+00 8.65E-07 0.00E+00 Xenon-133 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Xenon-135 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zirconium-97 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL FOR PERIOD CURIES 2.20E-02 3.49E-02 1.15E+01 1.59E+01 5-7

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL LIQUID EFFLUENTS Unit: 2 Starting: 1-Jul-2020 Ending: 31-Dec-2020 EST. TOT TYPE OF EFFLUENT UNITS QUARTER 3 QUARTER 4 ERROR A. FISSION & ACTIVATION PRODUCTS

1. TOTAL RELEASE (NOT INCLUDING TRITIUM, CURIES 2.05E-03 1.31E-03 10 GASES, ALPHA)

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 1.64E-09 7.08E-10 PERIOD

3. PERCENT OF EC* LIMIT (FRACTIONAL)

% 3.14E-03 1.17E-03 B. TRITIUM

1. TOTAL RELEASE CURIES 8.17E+01 6.25E+02 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 6.52E-05 3.39E-04 PERIOD

3. % OF LIMIT (1.00E-02 uCi/mL) % 6.52E-01 3.39E+00 C. DISSOLVED AND ENTRAINED GASES

1. TOTAL RELEASE CURIES 7.68E-06 5.90E-05 10

2. AVERAGE DILUTED CONCENTRATION DURING uCi/mL 6.13E-12 3.20E-11 PERIOD

3. PERCENT OF LIMIT (2.00E-04 uCi/mL)

% 3.06E-06 1.60E-05 D. GROSS ALPHA RADIOACTIVITY

1. TOTAL RELEASE CURIES 0.00E+00 0.00E+00 10 E. WASTE VOL RELEASED

1. TOTAL PRE-DILUTION VOLUME LITERS 6.08E+06 6.54E+06 1

2. BATCH PRE-DILUTION VOLUME LITERS 6.64E+05 1.13E+06 1 F. VOLUME OF DILUTION WATER USED**

LITERS 1.25E+09 1.84E+09 10

EC= Effluent Concentration

- Volume of dilution water used means the volume of water circulated through the main condenser during the actual time of release. Liquid effluent releases ultimately dilute into the volume of the onsite main cooling reservoir and then into offsite water bodies as described in Section 2, subsection Radiological Impact on Man of this report.

5-8

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY Unit 2 REPORT CATEGORY: SEMIANNUAL LIQUID CONTINUOUS AND BATCH RELEASES. TOTALS FOR EACH NUCLIDE RELEASED.

TYPE OF ACTIVITY: ALL RADIONUCLIDES REPORTING PERIOD: QUARTER # 3 AND QUARTER # 4 YEAR 2020 CONTINUOUS RELEASES BATCH RELEASES NUCLIDES UNITS QUARTER 3 QUARTER 4 QUARTER 3 QUARTER 4 RELEASED ALL NUCLIDES Silver-110m CURIES 0.00E+00 0.00E+00 3.28E-04 4.01E-05 Arsenic-76 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cobalt-57 CURIES 0.00E+00 0.00E+00 1.36E-06 0.00E+00 Cobalt-58 CURIES 0.00E+00 0.00E+00 4.50E-05 2.90E-05 Cobalt-60 CURIES 0.00E+00 0.00E+00 9.69E-04 5.49E-04 Chromium-51 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cesium-137 CURIES 0.00E+00 0.00E+00 9.74E-07 1.31E-05 Iron-55 CURIES 0.00E+00 0.00E+00 3.79E-04 2.84E-04 Tritium CURIES 6.03E-02 3.86E-02 8.17E+01 6.25E+02 Manganese-54 CURIES 0.00E+00 0.00E+00 3.68E-05 8.06E-05 Niobium-95 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nickel-63 CURIES 0.00E+00 0.00E+00 1.15E-04 1.59E-04 Antimony-124 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Antimony-125 CURIES 0.00E+00 0.00E+00 1.66E-04 1.38E-04 Tin-113 CURIES 0.00E+00 0.00E+00 4.27E-06 1.11E-06 Tin-117m CURIES 0.00E+00 0.00E+00 0.00E+00 1.31E-05 Strontium-92 CURIES 0.00E+00 0.00E+00 2.48E-06 5.95E-07 Xenon-133 CURIES 0.00E+00 0.00E+00 7.68E-06 5.90E-05 Xenon-135 CURIES 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zirconium-97 CURIES 0.00E+00 0.00E+00 4.33E-06 0.00E+00 TOTAL FOR PERIOD CURIES 6.03E-02 3.86E-02 8.17E+01 6.25E+02 5-9

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Liquid Effluents STP NUCLEAR OPERATING COMPANY Unit 1 plus 2 Total REPORT CATEGORY: ANNUAL LIQUID RELEASES. TOTALS FOR EACH NUCLIDE RELEASED. FOR ALL OF 2020 NUCLIDES UNIT 1 UNIT 2 TOTAL UNITS RELEASED 2020 2020 2020 ALL NUCLIDES Silver-110m CURIES 6.92E-05 4.64E-04 5.33E-04 Arsenic-76 CURIES 3.26E-05 0.00E+00 3.26E-05 Cobalt-57 CURIES 0.00E+00 1.36E-06 1.36E-06 Cobalt-58 CURIES 2.73E-04 1.33E-04 4.05E-04 Cobalt-60 CURIES 6.10E-04 1.68E-03 2.29E-03 Chromium-51 CURIES 2.44E-04 0.00E+00 2.44E-04 Cesium-137 CURIES 0.00E+00 1.40E-05 1.40E-05 Iron-55 CURIES 5.00E-04 9.92E-04 1.49E-03 Tritium CURIES 8.75E+02 7.34E+02 1.61E+03 Manganese-54 CURIES 4.80E-05 1.17E-04 1.65E-04 Niobium-95 CURIES 7.88E-06 0.00E+00 7.88E-06 Nickel-63 CURIES 3.09E-04 3.22E-04 6.31E-04 Antimony-124 CURIES 0.00E+00 4.34E-05 4.34E-05 Antimony-125 CURIES 0.00E+00 4.24E-04 4.24E-04 Tin-113 CURIES 0.00E+00 5.37E-06 5.37E-06 Tin-117m CURIES 0.00E+00 1.31E-05 1.31E-05 Strontium-92 CURIES 3.71E-06 3.94E-06 7.65E-06 Xenon-133 CURIES 9.66E-04 6.67E-05 1.03E-03 Xenon-135 CURIES 1.37E-04 0.00E+00 1.37E-04 Zirconium-97 CURIES 5.27E-07 4.33E-06 4.86E-06 TOTAL FOR PERIOD CURIES 8.75E+02 7.34E+02 1.61E+03 TOTAL Noble Gases CURIES 1.10E-03 6.67E-05 1.17E-03 TOTAL Excluding CURIES Tritium & Noble Gases 2.10E-03 4.22E-03 6.31E-03 TOTAL Gamma Emitters Excluding millicuries Noble Gases 1.29E+00 2.90E+00 4.19E+00 5-10

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Solid Waste and Irradiated Fuel Shipments Solid Waste and Irradiated Fuel Shipments 6-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Solid Waste and Irradiated Fuel Shipments A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (not irradiated fuel) 12-Month Period Estimated

1. Type of Waste Units Shipped Error, (+/-)%

m3 2.62E+01

a. Spent resins, filters, evaporator bottoms, 2.00E+01 etc.

Ci 2.83E+02 m3 4.27E+02

b. Dry compressible waste, contaminated 2.00E+01 equip., etc.

Ci 1.64E+00 m3 None

c. Irradiated components, control rods, etc. N/A Ci None m3 2.57E+01

d. Other (Large Reactor Components and 2.00E+01 Associated Commodities)

Ci 4.26E-02 m3 5.96E+01

e. Low Level Exempt Quantities of sewage 2.00E+01 sludge and resin.

Ci 2.01E-05

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

a. Spent resins, filter sludges, Shipped Curie evaporator bottoms, etc. (Ci)

Manganese-54 6.37E+00 2.25%

Iron-55 2.83E+01 10.03%

Cobalt-60 8.34E+01 29.52%

Nickel-63 1.52E+02 53.8%

b. Dry compressible waste, Shipped Curie contaminated equip., etc. (Ci)

Manganese-54 3.66E-02 2.22%

Iron-55 7.93E-01 48.26%

Cobalt-58 6.36E-02 3.87%

Cobalt-60 3.97E-01 24.14%

Nickel-63 2.75E-01 16.73%

Niobium-95 3.12E-02 1.9%

c. Irradiated components, Shipped Curie control rods, etc. (Ci)

None 0.00E+00 0.00%

6-2

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Solid Waste and Irradiated Fuel Shipments

d. Other (Large Reactor Shipped Curie Components and Associated %

(Ci)

Commodities)

Chromium-51 3.45E-03 8.06%

Manganese-54 8.46E-04 1.98%

Iron-55 1.59E-02 37.1%

Cobalt-58 5.58E-03 13.02%

Cobalt-60 6.78E-03 15.84%

Nickel-63 4.92E-03 11.49%

Zirconium-95 1.46E-03 3.4%

Niobium-95 2.89E-03 6.75%

e. Low Level Exempt Shipped Curie Quantities of sewage sludge %

(Ci) and resin.

Tritium 1.82E-05 90.37%

Manganese-54 2.20E-08 0.11%

Beryllium-7 5.61E-07 2.79%

Cobalt-60 1.28E-06 6.35%

Iron-55 6.50E-08 0.32%

Nickel-63 1.20E-08 0.06%

3. Solid Waste Disposition Number of Mode of Type of Waste Destination Shipments Transportation

a. Spent resins, filter sludges, evaporator Waste Control Specialists -

bottoms, etc.

Compact Waste Disposal Facility

b. Dry compressible waste, contaminated 18 Truck 9998 W. State Highway 176 equip., etc.

Andrews, Texas 79714

d. Other (Large Reactor Components and Associated Commodities)

Republic Services

Blue Ridge Landfill 3 Truck e. Low Level Exempt Quantities 2200 FM 521 Fresno, Texas 77545 Note: *Shipped per Texas Commission on Environmental Quality exemption to industrial landfill

4. Class of Solid Waste:

A, B, C

5. Type of Containers Used for Shipment:

General Design, Type A Containers, Type B Containers

6. Solidifying Agent: N/A B. Irradiated Fuel Shipments (Disposal): No shipments made during this period 6-3

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Blank Page Intentionally Left Blank

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Dose Data Tab Dose Data Tab

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Dose Data Tab Intentionally Left Blank

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Dose Accumulations Dose Accumulations 7-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Dose Accumulations STP NUCLEAR OPERATING COMPANY

SUMMARY

OF MAXIMUM INDIVIDUAL DOSES Unit: 1 TOTAL ACCUMULATION FOR PERIODS:

for LIQUID, GASEOUS AND AIR Starting: 1-Jan-2020 Ending: 31-Dec-2020 LIMIT ESTIMATED LOCATION % OF APPLICABLE AGE (mrad EFFLUENT DOSE DIST DIR APPLICABLE ORGAN GROUP or (mrem) (m) (TOWARD) LIMIT mrem)

LITTLE TOTAL LIQUID 5.02E-03 ADULT ROBBINS 1.67E-01 3 BODY SLOUGH(5)

LITTLE LIQUID GI-TRACT 5.02E-03 ADULT ROBBINS 5.02E-02 10 SLOUGH(5)

AIR DOSE NOBLE GAS 1.40E-04 1400m N 1.40E-03 10 (gamma-mrad)

AIR DOSE NOBLE GAS 6.47E-05 1400m N 3.24E-04 20 (beta-mrad)

TOTAL NOBLE GAS 9.26E-05 ALL(1) 1400m N 1.85E-03 5 BODY TOTAL NOBLE GAS 3.99E-05 ALL(2) 4000m WSW 7.98E-04 5 BODY NOBLE GAS SKIN 1.53E-04 ALL(1) 1400m N 1.02E-03 15 NOBLE GAS SKIN 6.50E-05 ALL(2) 4000m WSW 4.33E-04 15 IODINE, PARTICULATES, BONE 1.58E-01 CHILD(1) 1400m N 1.05E+00 15 TRITIUM & C-14 IODINE, PARTICULATES, BONE 4.05E-02 CHILD(2) 4000m WSW 2.70E-01 15 TRITIUM & C-14

SUMMARY

OF POPULATION DOSES FOR 2020 ESTIMATED AVERAGE DOSE TO EFFLUENT APPLICABLE ORGAN POPULATION DOSE POPULATION (rem per person)

(person-rem)

LIQUID TOTAL BODY 3.30E-04 7.54E-08(3)

GASEOUS TOTAL BODY 3.27E-02 3.02E-09(4)

NOTES:

(1)

Doses were calculated for HYPOTHETICAL receptors at the site boundary.

(2)

Highest dose for nearest individual or receptor. This individual is assumed to reside at this location.

(3)

Calculation based on a population of 303,500 for shore line exposure and for salt water invertebrate ingestion and 3,800 for salt water sport fish ingestion.

(4)

Calculation based on a population of 299,000 within fifty (50) miles of South Texas Project.

(5)

Receptor at this location is an adult ingesting fresh water sport fish and receiving shoreline exposure from the Little Robbins Slough Area.

7-2

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Dose Accumulations STP NUCLEAR OPERATING COMPANY

SUMMARY

OF MAXIMUM INDIVIDUAL DOSES Unit: 2 TOTAL ACCUMULATION FOR PERIODS:

for LIQUID, GASEOUS, AND AIR Starting: 1-Jan-2020 Ending: 31-Dec-2020 LIMIT ESTIMATED LOCATION % OF APPLICABLE AGE (mrad EFFLUENT DOSE DIST DIR APPLICABL ORGAN GROUP or (mrem) (m) (TOWARD) E LIMIT mrem)

LITTLE TOTAL LIQUID 4.22E-03 ADULT ROBBINS 1.41E-01 3 BODY SLOUGH(5)

LITTLE LIQUID GI-TRACT 4.23E-03 ADULT ROBBINS 4.23E-02 10 SLOUGH(5)

AIR DOSE NOBLE GAS 3.60E-04 1400m N 3.60E-03 10 (gamma-mrad)

AIR DOSE NOBLE GAS 1.86E-04 1400m N 9.32E-04 20 (beta-mrad)

TOTAL NOBLE GAS 2.38E-04 ALL(1) 1400m N 4.76E-03 5 BODY TOTAL NOBLE GAS 6.07E-05 ALL(2) 4000m WSW 1.21E-03 5 BODY NOBLE GAS SKIN 3.97E-04 ALL(1) 1400m N 2.65E-03 15 NOBLE GAS SKIN 9.99E-05 ALL(2) 4000m WSW 6.66E-04 15 IODINE, PARTICULATES, BONE 1.57E-01 CHILD(1) 1400m N 1.04E+00 15 TRITIUM & C-14 IODINE, PARTICULATES, BONE 4.15E-02 CHILD(2) 4000m WSW 2.77E-01 15 TRITIUM & C-14

SUMMARY

OF POPULATION DOSES FOR 2020 ESTIMATED AVERAGE DOSE TO EFFLUENT APPLICABLE ORGAN POPULATION DOSE POPULATION (rem per person)

(person-rem)

LIQUID TOTAL BODY 2.97E-04 6.35E-08(3)

GASEOUS TOTAL BODY 3.23E-02 2.99E-09(4)

NOTES:

(1)

Doses were calculated for HYPOTHETICAL receptors at the site boundary.

(2)

Highest dose for nearest individual or receptor. This individual is assumed to reside at this location.

(3)

Calculation based on a population of 303,500 for shore line exposure and for salt water invertebrate ingestion and 3,800 for salt water sport fish ingestion.

(4)

Calculation based on a population of 299,000 within fifty (50) miles of South Texas Project.

(5)

Receptor at this location is an adult ingesting fresh water sport fish and receiving shoreline exposure from the Little Robbins Slough Area.

7-3

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Dose Accumulations STP NUCLEAR OPERATING COMPANY

SUMMARY

OF MAXIMUM INDIVIDUAL DOSES Unit: 1 plus 2 TOTAL ACCUMULATION FOR PERIODS:

for LIQUID, GASEOUS, AND AIR Starting: 1-Jan-2020 Ending: 31-Dec-2020 UNIT 1 UNIT 2 TOTAL 1+2 LOCATION APPLICABLE ESTIMATED ESTIMATED AGE EFFLUENT ESTIMATED DIST DIR ORGAN DOSE DOSE GROUP DOSE (mrem) (m) (TOWARD)

(mrem) (mrem)

LITTLE TOTAL LIQUID 5.02E-03 4.22E-03 9.23E-03 ADULT ROBBINS BODY SLOUGH(5)

LITTLE LIQUID GI-TRACT 5.02E-03 4.23E-03 9.26E-03 ADULT ROBBINS SLOUGH(5)

AIR DOSE NOBLE GAS (gamma-mrad) 1.40E-04 3.60E-04 5.00E-04 1400m N AIR DOSE NOBLE GAS (beta-mrad) 6.47E-05 1.86E-04 2.51E-04 1400m N TOTAL NOBLE GAS BODY 9.26E-05 2.38E-04 3.30E-04 ALL(1) 1400m N TOTAL NOBLE GAS BODY 3.99E-05 6.07E-05 1.01E-04 ALL(2) 4000m WSW NOBLE GAS SKIN 1.53E-04 3.97E-04 5.50E-04 ALL(1) 1400m N NOBLE GAS SKIN 6.50E-05 9.99E-05 1.65E-04 ALL(2) 4000m WSW IODINE, PARTICULATES, BONE 1.58E-01 1.57E-01 3.15E-01 CHILD(1) 1400m N TRITIUM & C-14 IODINE, PARTICULATES, BONE 4.05E-02 4.15E-02 8.21E-02 CHILD(2) 4000m WSW TRITIUM & C-14 IODINE, TOTAL 4000m WSW PARTICULATES, 3.90E-03 3.81E-03 7.71E-03 ADULT(2)

BODY TRITIUM & C-14

SUMMARY

OF POPULATION DOSES FOR 2020 ESTIMATED AVERAGE DOSE TO EFFLUENT APPLICABLE ORGAN POPULATION DOSE POPULATION (rem per person)

(person-rem)

LIQUID TOTAL BODY 6.27E-04 1.39E-07(3)

GASEOUS TOTAL BODY 6.49E-02 4.67E-09(4)

NOTES:

(1)

Doses were calculated for HYPOTHETICAL receptors at the site boundary.

(2)

Highest dose for nearest individual or receptor. This individual is assumed to reside at this location.

(3)

Calculation based on a population of 303,500 for shore line exposure and for salt water invertebrate ingestion and 3,800 for salt water sport fish ingestion.

(4)

Calculation based on a population of 299,000 within fifty (50) miles of South Texas Project.

(5)

Receptor at this location is an adult ingesting fresh water sport fish and receiving shoreline exposure from the Little Robbins Slough Area.

7-4

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Results of Direct Radiation Measurements Results of Direct Radiation Measurements Program 8-1

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Results of Direct Radiation Measurements STP NUCLEAR OPERATING COMPANY Onsite Direct Radiation Measurements REPORT CATEGORY: THERMOLUMINESCENT DOSIMETER MONITORING STATIONS QUARTERLY RESULTS FOR 2020 TABLE 8-1 MONITORING STATION AVERAGE AVERAGE NUMBER QUARTER 1 QUARTER 2 QUARTER 3 QUARTER 4 RATE NET RATE (Noted on Figure 8-1) milliRoentgen milliRoentgen UNITS milliRoentgen milliRoentgen milliRoentgen milliRoentgen per quarter per hour PROTECTED AREA 1 10 10 10 9 10 0.0045 2 13 12 12 12 12 0.0056 3 12 12 11 11 12 0.0053 4 14 12 13 13 13 0.0060 5 14 16 18 15 16 0.0072 6 16 15 16 14 15 0.0070 7 15 16 16 14 15 0.0070 8 14 13 15 13 14 0.0063 9 12 11 12 12 12 0.0054 10 16 14 16 15 15 0.0070 11 21 19 20 19 20 0.0090 12 11 10 11 10 11 0.0048 13 11 12 11 9 11 0.0049 14 12 10 12 10 11 0.0050 15 13 13 14 13 13 0.0061 16 13 11 14 13 13 0.0058 8-2

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Results of Direct Radiation Measurements OLD STEAM GENERATOR STORAGE FACILITY 25 12 12 12 11 12 0.0054 26 14 12 15 14 14 0.0063 27 12 11 14 13 13 0.0057 28 13 11 13 13 13 0.0057 LOW LEVEL RAD WASTE STORAGE AREA 29 16 14 16 14 15 0.0069 30 15 13 16 14 15 0.0066 31 16 14 16 15 15 0.0070 32 16 15 16 14 15 0.0070 33 15 14 15 15 15 0.0068 34 15 14 15 15 15 0.0068 35 18 21 26 21 22 0.0098 36 14 14 16 20 16 0.0073 ISFSI AREA 37* 13 11 13 13 13 0.0057 38* 16 15 17 16 16 0.0073 39* 18 16 18 18 18 0.0080 40* 28 22 28 26 26 0.0119

The Independent Spent Fuel Storage Installation (ISFSI) Area started storing radioactive material in 2019.

Environmental Thermoluminescent dosimeters (TLDs) were first installed January 2015. TLD (#37 through #40) used both environmental (Panasonic UD 814s) and personnel TLDs (Mirion type 36 badge) starting the third quarter in 2015 to measure gamma and neutron background exposure.

Note: There was no radioactive material stored using the onsite staging facility (warehouse D) in 2020.

8-3

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Results of Direct Radiation Measurements Notes for Onsite Direct Radiation Measurements Measurement Results Individual values normalized to a 91 day quarter.

Only the calcium sulfate elements were used in these averages for the environmental TLDs.

Average Net Rate:

Difference between the 2020 exposure rate and the 1986 measured rate is due to natural background Average Net Rate= Average rate / 91 days / 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months per day The pre-operational background rate of 15.4 mR at the site boundary in 1986 has been used to reflect the background baseline exposure rate for STP. Historically the exposure rates measured near the protected area fence have been lower than the historical background at the site boundary. However, a few dosimeter stations have at times exceeded this background rate due to radioactive waste shipping activities.

Zero:

Zero (0 or 0.00) indicate background levels Milliroentgen:

Milliroentgen or mR is a unit of exposure for X-rays and gamma rays.

8-4

Figure 8-1 8-5

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RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Meteorological Data Tab Meteorological Data Tab

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Meteorological Data Tab Intentionally Left Blank

RADIOACTIVE EFFLUENT RELEASE REPORT 2020 SOUTH TEXAS PROJECT Joint Frequency Tables Joint Frequency Tables 9-1

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER 9-2

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 1 6 2 0 0 9 4.8% 16.9 NNE 0 0 0 1 13 2 0 0 16 8.5% 16.8 NE 0 0 0 0 2 0 0 0 2 1.1% 15.8 ENE 0 0 0 0 0 1 0 0 1 0.5% 19.3 E 0 0 0 0 1 0 0 0 1 0.5% 16.3 ESE 0 0 0 1 8 0 0 0 9 4.8% 16.0 SE 0 0 0 0 4 7 1 0 12 6.4% 20.6 SSE 0 0 0 4 16 19 1 0 40 21.3% 18.8 S 0 0 0 4 20 2 0 0 26 13.8% 14.3 SSW 0 0 0 4 5 0 0 0 9 4.8% 13.4 SW 0 0 0 2 5 3 0 0 10 5.3% 16.1 WSW 0 0 0 0 1 0 0 0 1 0.5% 16.5 W 0 1 0 4 0 0 0 0 5 2.7% 9.0 WNW 0 0 2 1 6 0 0 0 9 4.8% 13.2 NW 0 0 1 1 6 3 1 0 12 6.4% 16.6 NNW 0 0 1 4 5 11 5 0 26 13.8% 19.0 Total 0 1 4 27 98 50 8 0 188

% Of Total 0.0% 0.5% 2.1% 14.4% 52.1% 26.6% 4.3% 0.0%

Average speed for this table (MPH): 16.8 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-3

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 1 2 0 0 0 3 3.5% 14.0 NNE 0 0 1 1 4 1 0 0 7 8.2% 14.5 NE 0 0 1 1 3 0 0 0 5 5.9% 12.0 ENE 0 0 0 3 2 1 0 0 6 7.1% 13.1 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 1 2 0 0 0 3 3.5% 14.3 SE 0 0 0 1 8 6 0 0 15 17.6% 17.4 SSE 0 0 0 3 5 5 0 0 13 15.3% 16.6 S 0 0 0 1 4 1 0 0 6 7.1% 14.6 SSW 0 0 0 3 0 0 0 0 3 3.5% 9.8 SW 0 0 0 1 1 0 0 0 2 2.4% 14.0 WSW 0 0 1 0 0 0 0 0 1 1.2% 6.9 W 0 0 1 0 0 0 0 0 1 1.2% 5.7 WNW 0 0 2 0 0 0 0 0 2 2.4% 6.1 NW 0 0 1 1 3 1 0 0 6 7.1% 15.3 NNW 0 0 3 1 4 2 2 0 12 14.1% 16.3 Total 0 0 10 18 38 17 2 0 85

% Of Total 0.0% 0.0% 11.8% 21.2% 44.7% 20.0% 2.4% 0.0%

Average speed for this table (MPH): 14.8 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-4

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 3 0 0 0 0 5 5.0% 8.2 NNE 0 0 0 1 2 0 0 0 3 3.0% 13.6 NE 0 0 0 2 1 0 0 0 3 3.0% 10.9 ENE 0 0 0 1 1 0 0 0 2 2.0% 13.4 E 0 0 0 2 2 0 0 0 4 4.0% 12.5 ESE 0 0 0 2 4 1 0 0 7 6.9% 13.9 SE 0 0 0 1 14 9 1 0 25 24.8% 17.9 SSE 0 0 1 2 6 8 0 0 17 16.8% 17.1 S 0 0 1 3 4 1 0 0 9 8.9% 13.2 SSW 0 0 1 2 2 0 0 0 5 5.0% 11.2 SW 0 0 1 1 0 0 0 0 2 2.0% 8.3 WSW 0 0 1 0 0 0 0 0 1 1.0% 6.8 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 4 2 1 4 0 0 11 10.9% 13.0 NNW 0 0 0 3 3 1 0 0 7 6.9% 14.3 Total 0 0 11 25 40 24 1 0 101

% Of Total 0.0% 0.0% 10.9% 24.8% 39.6% 23.8% 1.0% 0.0%

Average speed for this table (MPH): 14.5 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-5

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 9 33 14 0 0 56 6.3% 16.3 NNE 0 0 3 10 30 7 1 0 51 5.8% 14.3 NE 0 1 3 26 24 2 0 0 56 6.3% 11.3 ENE 0 0 3 26 18 0 0 0 47 5.3% 11.0 E 0 0 1 18 28 1 0 0 48 5.4% 12.4 ESE 0 0 5 24 40 5 0 0 74 8.4% 13.3 SE 0 0 2 21 87 30 9 0 149 16.9% 16.4 SSE 0 0 7 31 94 34 4 0 170 19.3% 15.3 S 0 0 21 20 6 7 0 0 54 6.1% 10.2 SSW 0 0 5 14 8 1 0 0 28 3.2% 11.5 SW 0 0 6 3 7 0 0 0 16 1.8% 12.3 WSW 0 0 1 4 7 0 0 0 12 1.4% 14.0 W 0 0 1 2 7 0 0 0 10 1.1% 14.5 WNW 0 3 5 4 8 0 0 0 20 2.3% 10.6 NW 0 0 1 5 18 6 1 0 31 3.5% 16.0 NNW 0 1 2 7 21 25 4 0 60 6.8% 17.4 0 0 0 0 1 0 0 0 1 0.1% 13.6 Total 0 5 66 224 437 132 19 0 883

% Of Total 0.0% 0.6% 7.5% 25.4% 49.5% 14.9% 2.2% 0.0%

Average speed for this table (MPH): 14.2 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-6

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 10 23 9 1 0 0 43 8.1% 10.5 NNE 0 1 10 22 0 0 0 0 33 6.3% 8.2 NE 0 2 14 2 0 0 0 0 18 3.4% 5.7 ENE 0 2 6 16 0 0 0 0 24 4.5% 7.6 E 0 0 26 18 12 0 0 0 56 10.6% 8.7 ESE 0 0 12 37 6 0 0 0 55 10.4% 9.3 SE 0 0 10 17 22 9 0 0 58 11.0% 13.1 SSE 0 0 9 30 35 10 0 0 84 15.9% 13.3 S 0 0 24 15 3 0 0 0 42 8.0% 7.6 SSW 0 1 23 2 0 0 0 0 26 4.9% 5.8 SW 0 1 4 7 0 0 0 0 12 2.3% 6.9 WSW 1 1 3 3 0 0 0 0 8 1.5% 6.7 W 0 2 7 1 0 0 0 0 10 1.9% 6.1 WNW 0 2 6 2 1 0 0 0 11 2.1% 5.7 NW 0 2 12 10 1 0 0 0 25 4.7% 7.7 NNW 0 3 9 8 3 0 0 0 23 4.4% 8.3 Total 1 17 185 213 92 20 0 0 528

% Of Total 0.2% 3.2% 35.0% 40.3% 17.4% 3.8% 0.0% 0.0%

Average speed for this table (MPH): 9.5 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-7

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 1 5 2 1 0 0 0 9 8.0% 7.3 NNE 0 2 9 5 0 0 0 0 16 14.2% 6.5 NE 0 1 9 0 0 0 0 0 10 8.8% 4.6 ENE 0 4 6 2 0 0 0 0 12 10.6% 5.4 E 0 5 4 1 1 0 0 0 11 9.7% 5.8 ESE 0 0 0 1 0 0 0 0 1 0.9% 11.5 SE 0 2 2 2 0 0 0 0 6 5.3% 5.8 SSE 0 0 3 0 0 0 0 0 3 2.7% 4.9 S 0 0 7 0 0 0 0 0 7 6.2% 6.0 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 2 0 0 0 0 0 2 1.8% 6.4 WSW 0 0 2 0 0 0 0 0 2 1.8% 4.9 W 0 1 3 0 0 0 0 0 4 3.5% 4.3 WNW 0 4 4 0 0 0 0 0 8 7.1% 3.5 NW 0 2 2 4 2 0 0 0 10 8.8% 8.1 NNW 0 0 6 6 0 0 0 0 12 10.6% 7.2 Total 0 22 64 23 4 0 0 0 113

% Of Total 0.0% 19.5% 56.6% 20.4% 3.5% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 6.0 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-8

Radioactive Release Effluent Report - RDRJFC South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 3 4 0 0 0 0 0 7 5.0% 4.2 NNE 0 1 9 2 0 0 0 0 12 8.6% 5.5 NE 0 3 15 3 0 0 0 0 21 15.1% 5.1 ENE 0 5 16 1 0 0 0 0 22 15.8% 4.4 E 0 3 6 2 0 0 0 0 11 7.9% 4.6 ESE 0 4 2 1 0 0 0 0 7 5.0% 4.1 SE 0 4 14 0 0 0 0 0 18 12.9% 4.0 SSE 0 2 3 0 0 0 0 0 5 3.6% 4.3 S 0 1 1 0 0 0 0 0 2 1.4% 2.7 SSW 0 1 0 0 0 0 0 0 1 0.7% 2.2 SW 0 1 0 0 0 0 0 0 1 0.7% 3.2 WSW 0 0 2 0 0 0 0 0 2 1.4% 4.6 W 0 2 2 0 0 0 0 0 4 2.9% 3.4 WNW 0 3 1 1 0 0 0 0 5 3.6% 3.8 NW 0 2 9 2 0 0 0 0 13 9.4% 5.3 NNW 0 3 2 3 0 0 0 0 8 5.8% 5.3 Total 0 38 86 15 0 0 0 0 139

% Of Total 0.0% 27.3% 61.9% 10.8% 0.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 4.6 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-9

Radioactive Release Effluent Report - RDRJFCA South Texas Project First Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 4 21 39 51 17 0 0 132 6.5% 12.9 NNE 0 4 32 42 49 10 1 0 138 6.8% 11.5 NE 0 7 42 34 30 2 0 0 115 5.6% 8.8 ENE 0 11 31 49 21 2 0 0 114 5.6% 8.6 E 0 8 37 41 44 1 0 0 131 6.4% 9.7 ESE 0 4 19 67 60 6 0 0 156 7.7% 11.7 SE 0 6 28 42 135 61 11 0 283 13.9% 15.1 SSE 0 2 23 70 156 76 5 0 332 16.3% 15.1 S 0 1 54 43 37 11 0 0 146 7.2% 10.2 SSW 0 2 29 25 15 1 0 0 72 3.5% 9.4 SW 0 2 13 14 13 3 0 0 45 2.2% 11.1 WSW 1 1 10 7 8 0 0 0 27 1.3% 10.0 W 0 6 14 7 7 0 0 0 34 1.7% 8.4 WNW 0 12 20 8 15 0 0 0 55 2.7% 8.2 NW 0 6 30 25 31 14 2 0 108 5.3% 11.8 NNW 0 7 23 32 36 39 11 0 148 7.3% 14.6 0 0 0 0 1 0 0 0 1 0.0% 13.6 Total 1 83 426 545 709 243 30 0 2037

% Of Total 0.0% 4.1% 20.9% 26.8% 34.8% 11.9% 1.5% 0.0%

Average speed for this table (MPH): 12.2 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 147 Total number of Valid hours : 2037 Total number of hours for period : 2184 9-10

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER 9-11

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 1 11 7 0 0 19 7.1% 17.3 NNE 0 0 0 3 11 2 0 0 16 5.9% 14.6 NE 0 0 0 6 5 0 0 0 11 4.1% 12.2 ENE 0 0 0 0 0 0 0 0 0 0.0% 0.0 E 0 0 0 1 3 0 0 0 4 1.5% 13.1 ESE 0 0 0 0 8 21 0 0 29 10.8% 19.1 SE 0 0 0 3 14 27 0 0 44 16.4% 19.3 SSE 0 0 0 4 28 11 1 0 44 16.4% 16.6 S 0 0 0 30 31 0 0 0 61 22.7% 12.4 SSW 0 0 0 13 7 0 0 0 20 7.4% 12.0 SW 0 0 0 6 5 0 0 0 11 4.1% 13.2 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 1 0 0 0 0 0 1 0.4% 5.7 NW 0 0 1 4 0 0 0 0 5 1.9% 10.4 NNW 0 0 1 2 0 1 0 0 4 1.5% 11.8 Total 0 0 3 73 123 69 1 0 269

% Of Total 0.0% 0.0% 1.1% 27.1% 45.7% 25.7% 0.4% 0.0%

Average speed for this table (MPH): 15.3 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-12

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 1 3 0 0 0 4 2.9% 15.6 NNE 0 0 1 5 3 0 0 0 9 6.4% 10.9 NE 0 0 0 8 4 0 0 0 12 8.6% 11.7 ENE 0 0 0 3 5 0 0 0 8 5.7% 14.1 E 0 0 0 2 2 0 0 0 4 2.9% 14.3 ESE 0 0 0 3 8 6 0 0 17 12.1% 17.4 SE 0 0 0 2 11 10 1 0 24 17.1% 18.5 SSE 0 0 0 5 18 4 0 0 27 19.3% 15.0 S 0 0 0 8 7 1 0 0 16 11.4% 12.7 SSW 0 0 0 3 0 0 0 0 3 2.1% 9.8 SW 0 0 0 1 2 0 0 0 3 2.1% 13.5 WSW 0 0 0 2 0 0 0 0 2 1.4% 10.5 W 0 0 0 0 1 0 0 0 1 0.7% 16.5 WNW 0 0 0 1 1 0 0 0 2 1.4% 13.4 NW 0 0 0 3 0 0 0 0 3 2.1% 8.8 NNW 0 0 1 4 0 0 0 0 5 3.6% 9.7 Total 0 0 2 51 65 21 1 0 140

% Of Total 0.0% 0.0% 1.4% 36.4% 46.4% 15.0% 0.7% 0.0%

Average speed for this table (MPH): 14.5 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-13

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 4 1 0 0 0 7 4.8% 9.8 NNE 0 0 0 4 1 0 0 0 5 3.4% 10.6 NE 0 0 0 6 4 1 0 0 11 7.5% 12.3 ENE 0 0 0 0 6 0 0 0 6 4.1% 13.5 E 0 0 0 1 2 0 0 0 3 2.1% 14.8 ESE 0 0 0 4 10 4 0 0 18 12.3% 15.9 SE 0 0 0 6 13 11 0 0 30 20.5% 15.9 SSE 0 0 2 2 16 5 1 0 26 17.8% 16.0 S 0 0 4 9 4 0 0 0 17 11.6% 10.4 SSW 0 0 4 4 2 0 0 0 10 6.8% 9.0 SW 0 0 1 1 1 0 0 0 3 2.1% 10.2 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 1 0 0 0 0 1 0.7% 8.6 NW 0 1 0 4 0 0 0 0 5 3.4% 8.5 NNW 0 0 2 2 0 0 0 0 4 2.7% 8.5 Total 0 1 15 48 60 21 1 0 146

% Of Total 0.0% 0.7% 10.3% 32.9% 41.1% 14.4% 0.7% 0.0%

Average speed for this table (MPH): 13.3 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-14

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 7 15 8 0 0 32 5.2% 14.9 NNE 0 0 1 19 11 1 1 0 33 5.4% 12.4 NE 0 1 5 16 5 1 0 0 28 4.6% 10.1 ENE 0 1 4 24 5 0 0 0 34 5.6% 9.4 E 0 2 4 15 13 0 0 0 34 5.6% 11.0 ESE 0 1 3 14 51 15 0 0 84 13.8% 15.0 SE 0 0 4 26 47 8 0 0 85 13.9% 13.9 SSE 0 0 7 32 70 14 0 0 123 20.2% 14.0 S 0 0 14 29 27 1 0 0 71 11.6% 11.1 SSW 0 0 11 13 3 0 0 0 27 4.4% 8.7 SW 0 0 5 5 0 0 0 0 10 1.6% 7.5 WSW 0 0 3 0 0 0 0 0 3 0.5% 6.2 W 0 0 3 4 1 1 0 0 9 1.5% 10.0 WNW 0 0 7 4 1 0 0 0 12 2.0% 7.3 NW 0 0 6 2 0 0 0 0 8 1.3% 7.2 NNW 0 1 2 8 5 1 0 0 17 2.8% 11.2 Total 0 6 81 218 254 50 1 0 610

% Of Total 0.0% 1.0% 13.3% 35.7% 41.6% 8.2% 0.2% 0.0%

Average speed for this table (MPH): 12.4 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-15

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 9 13 9 1 0 0 32 4.9% 10.4 NNE 0 0 7 15 6 0 0 0 28 4.2% 9.6 NE 0 1 7 14 5 0 0 0 27 4.1% 9.4 ENE 0 0 10 6 4 0 0 0 20 3.0% 8.5 E 0 4 15 15 4 0 0 0 38 5.8% 8.1 ESE 0 0 10 23 15 0 0 0 48 7.3% 10.7 SE 0 0 22 83 19 2 0 0 126 19.1% 10.0 SSE 0 1 23 65 23 1 0 0 113 17.1% 10.1 S 0 0 31 130 2 0 0 0 163 24.7% 10.5 SSW 0 0 16 7 1 0 0 0 24 3.6% 6.8 SW 0 0 0 1 0 0 0 0 1 0.2% 8.4 WSW 0 0 4 0 0 0 0 0 4 0.6% 4.9 W 0 0 0 4 0 0 0 0 4 0.6% 9.6 WNW 0 1 5 0 1 0 0 0 7 1.1% 5.8 NW 0 0 9 1 2 0 0 0 12 1.8% 7.3 NNW 0 1 2 6 2 0 0 0 11 1.7% 8.3 0 0 0 1 0 0 0 0 1 0.2% 8.5 Total 0 8 170 384 93 4 0 0 659

% Of Total 0.0% 1.2% 25.8% 58.3% 14.1% 0.6% 0.0% 0.0%

Average speed for this table (MPH): 9.7 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-16

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 1 6 4 1 0 0 0 12 6.9% 7.1 NNE 0 4 6 4 0 0 0 0 14 8.1% 5.7 NE 0 5 13 0 0 0 0 0 18 10.4% 4.5 ENE 0 2 11 0 0 0 0 0 13 7.5% 4.5 E 0 4 12 1 0 0 0 0 17 9.8% 5.0 ESE 0 5 13 4 0 0 0 0 22 12.7% 5.6 SE 0 9 20 5 1 0 0 0 35 20.2% 5.8 SSE 0 4 10 0 0 0 0 0 14 8.1% 4.6 S 0 0 0 0 1 0 0 0 1 0.6% 17.0 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 3 0 0 0 0 0 3 1.7% 4.1 WNW 0 4 4 1 0 0 0 0 9 5.2% 4.5 NW 0 0 7 0 0 0 0 0 7 4.0% 4.4 NNW 0 1 6 1 0 0 0 0 8 4.6% 6.0 Total 0 39 111 20 3 0 0 0 173

% Of Total 0.0% 22.5% 64.2% 11.6% 1.7% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 5.3 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-17

Radioactive Release Effluent Report - RDRJFC South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 4 10 2 0 0 0 0 16 8.6% 4.8 NNE 0 6 11 5 0 0 0 0 22 11.9% 5.1 NE 0 9 17 0 0 0 0 0 26 14.1% 4.2 ENE 0 13 4 1 0 0 0 0 18 9.7% 3.2 E 0 6 3 0 0 0 0 0 9 4.9% 2.8 ESE 0 11 8 0 0 0 0 0 19 10.3% 3.2 SE 0 6 8 0 0 0 0 0 14 7.6% 3.7 SSE 0 1 1 0 0 0 0 0 2 1.1% 3.5 S 0 2 1 0 0 0 0 0 3 1.6% 3.6 SSW 0 3 0 0 0 0 0 0 3 1.6% 2.3 SW 0 2 0 0 0 0 0 0 2 1.1% 1.9 WSW 0 0 1 0 0 0 0 0 1 0.5% 3.7 W 0 1 2 0 0 0 0 0 3 1.6% 3.6 WNW 0 6 7 0 0 0 0 0 13 7.0% 3.8 NW 0 7 7 0 0 0 0 0 14 7.6% 4.0 NNW 0 5 15 0 0 0 0 0 20 10.8% 4.3 Total 0 82 95 8 0 0 0 0 185

% Of Total 0.0% 44.3% 51.4% 4.3% 0.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 3.9 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-18

Radioactive Release Effluent Report - RDRJFCA South Texas Project Second Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 5 29 32 40 16 0 0 122 5.6% 11.7 NNE 0 10 26 55 32 3 1 0 127 5.8% 9.9 NE 0 16 42 50 23 2 0 0 133 6.1% 8.5 ENE 0 16 29 34 20 0 0 0 99 4.5% 8.1 E 0 16 34 35 24 0 0 0 109 5.0% 8.7 ESE 0 17 34 48 92 46 0 0 237 10.9% 13.0 SE 0 15 54 125 105 58 1 0 358 16.4% 12.5 SSE 0 6 43 108 155 35 2 0 349 16.0% 12.9 S 0 2 50 206 72 2 0 0 332 15.2% 11.0 SSW 0 3 31 40 13 0 0 0 87 4.0% 8.8 SW 0 2 6 14 8 0 0 0 30 1.4% 10.1 WSW 0 0 8 2 0 0 0 0 10 0.5% 6.3 W 0 1 8 8 2 1 0 0 20 0.9% 8.4 WNW 0 11 24 7 3 0 0 0 45 2.1% 5.7 NW 0 8 30 14 2 0 0 0 54 2.5% 6.5 NNW 0 8 29 23 7 2 0 0 69 3.2% 7.9 0 0 0 1 0 0 0 0 1 0.0% 8.5 Total 0 136 477 802 598 165 4 0 2182

% Of Total 0.0% 6.2% 21.9% 36.8% 27.4% 7.6% 0.2% 0.0%

Average speed for this table (MPH): 10.9 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 2 Total number of Valid hours : 2182 Total number of hours for period : 2184 9-19

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER 9-20

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 4 13 4 4 0 0 25 8.0% 12.4 NNE 0 0 4 4 13 0 0 0 21 6.7% 12.4 NE 0 0 2 7 11 0 0 0 20 6.4% 12.5 ENE 0 0 1 1 3 0 0 0 5 1.6% 12.1 E 0 0 0 0 1 0 0 0 1 0.3% 14.8 ESE 0 0 0 2 6 1 0 0 9 2.9% 14.4 SE 0 0 0 1 13 4 0 0 18 5.8% 16.4 SSE 1 0 0 6 7 0 0 0 14 4.5% 12.2 S 0 0 1 75 58 1 0 0 135 43.1% 12.4 SSW 0 0 2 24 7 0 0 0 33 10.5% 11.0 SW 0 0 1 15 3 0 0 0 19 6.1% 10.4 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 1 0 0 0 0 1 0.3% 12.4 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 1 5 2 3 0 0 11 3.5% 13.4 0 0 0 1 0 0 0 0 1 0.3% 12.5 Total 1 0 16 155 128 13 0 0 313

% Of Total 0.3% 0.0% 5.1% 49.5% 40.9% 4.2% 0.0% 0.0%

Average speed for this table (MPH): 12.5 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-21

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 4 4 0 0 0 0 8 5.8% 7.5 NNE 0 0 2 8 3 0 0 0 13 9.4% 10.5 NE 0 0 0 7 1 0 0 0 8 5.8% 10.6 ENE 0 0 2 2 5 0 0 0 9 6.5% 11.2 E 0 0 2 0 2 0 0 0 4 2.9% 9.8 ESE 0 0 1 1 2 0 0 0 4 2.9% 12.2 SE 0 0 3 4 6 0 0 0 13 9.4% 11.0 SSE 0 0 0 3 4 0 0 0 7 5.0% 12.5 S 0 0 3 32 5 0 0 0 40 28.8% 10.0 SSW 0 0 5 10 0 0 0 0 15 10.8% 8.3 SW 0 0 1 4 0 0 0 0 5 3.6% 8.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 2 1 0 0 0 0 3 2.2% 7.4 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 1 2 1 1 0 0 0 5 3.6% 8.2 NNW 0 0 1 3 1 0 0 0 5 3.6% 9.5 Total 0 1 28 80 30 0 0 0 139

% Of Total 0.0% 0.7% 20.1% 57.6% 21.6% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 9.9 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-22

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 3 1 1 0 0 7 4.8% 10.4 NNE 0 0 1 3 4 0 0 0 8 5.5% 11.8 NE 0 1 1 6 0 0 0 0 8 5.5% 8.1 ENE 0 0 2 4 2 0 0 0 8 5.5% 9.8 E 0 0 0 2 0 0 0 0 2 1.4% 10.0 ESE 0 0 1 5 2 1 0 0 9 6.2% 11.8 SE 0 0 0 12 6 0 0 0 18 12.4% 12.0 SSE 0 0 2 8 5 0 0 0 15 10.3% 11.2 S 0 0 4 20 3 0 0 0 27 18.6% 10.3 SSW 0 0 5 9 1 0 0 0 15 10.3% 8.9 SW 0 0 1 5 0 0 0 0 6 4.1% 9.1 WSW 0 0 1 1 0 0 0 0 2 1.4% 7.3 W 0 0 2 2 0 0 0 0 4 2.8% 6.3 WNW 0 0 3 0 0 0 0 0 3 2.1% 5.4 NW 0 0 5 0 3 0 0 0 8 5.5% 8.8 NNW 0 0 1 2 1 1 0 0 5 3.4% 11.8 Total 0 1 31 82 28 3 0 0 145

% Of Total 0.0% 0.7% 21.4% 56.6% 19.3% 2.1% 0.0% 0.0%

Average speed for this table (MPH): 10.2 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-23

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 8 13 11 2 0 0 34 7.1% 11.6 NNE 0 4 6 18 12 10 0 0 50 10.4% 12.5 NE 0 3 2 9 9 0 0 0 23 4.8% 10.8 ENE 0 0 5 4 11 4 1 0 25 5.2% 14.0 E 0 6 4 6 4 3 0 0 23 4.8% 9.3 ESE 0 1 3 13 7 7 0 0 31 6.4% 13.1 SE 0 1 3 12 6 1 1 0 24 5.0% 12.1 SSE 0 1 8 32 23 3 0 0 67 13.9% 11.7 S 0 0 12 71 16 0 0 0 99 20.5% 10.1 SSW 0 0 5 24 0 0 0 0 29 6.0% 9.3 SW 0 0 3 8 0 0 0 0 11 2.3% 8.5 WSW 0 0 6 0 0 0 0 0 6 1.2% 5.0 W 0 0 1 0 0 0 0 0 1 0.2% 6.1 WNW 0 1 6 3 0 0 0 0 10 2.1% 6.6 NW 0 1 4 6 8 0 0 0 19 3.9% 10.3 NNW 0 0 9 15 6 0 0 0 30 6.2% 9.4 Total 0 18 85 234 113 30 2 0 482

% Of Total 0.0% 3.7% 17.6% 48.5% 23.4% 6.2% 0.4% 0.0%

Average speed for this table (MPH): 10.9 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-24

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 6 18 34 6 0 0 0 64 8.4% 8.4 NNE 0 2 24 25 10 4 0 0 65 8.5% 9.4 NE 0 2 19 7 5 0 0 0 33 4.3% 7.8 ENE 0 0 10 4 4 0 0 0 18 2.4% 8.4 E 0 1 10 13 3 2 1 0 30 3.9% 10.5 ESE 0 2 9 11 5 2 1 1 31 4.1% 10.9 SE 0 3 13 10 2 0 1 0 29 3.8% 8.1 SSE 0 10 34 103 21 0 0 0 168 22.0% 9.2 S 0 0 49 112 6 0 0 0 167 21.9% 8.6 SSW 0 1 30 44 0 0 0 0 75 9.8% 7.8 SW 0 0 6 11 1 0 0 0 18 2.4% 8.3 WSW 0 0 4 1 1 0 0 0 6 0.8% 7.8 W 0 0 3 0 0 0 0 0 3 0.4% 5.1 WNW 0 2 4 0 0 0 0 0 6 0.8% 4.1 NW 0 0 13 4 0 0 0 0 17 2.2% 6.0 NNW 0 1 13 16 1 0 0 0 31 4.1% 7.7 0 0 0 1 0 0 0 0 1 0.1% 8.2 Total 0 30 259 396 65 8 3 1 762

% Of Total 0.0% 3.9% 34.0% 52.0% 8.5% 1.0% 0.4% 0.1%

Average speed for this table (MPH): 8.7 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-25

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 4 9 3 0 0 0 0 16 7.0% 5.4 NNE 0 10 16 7 0 0 0 0 33 14.4% 5.3 NE 0 7 4 1 0 0 0 0 12 5.2% 4.2 ENE 0 5 9 0 0 0 0 0 14 6.1% 4.2 E 0 9 10 1 0 0 0 0 20 8.7% 4.2 ESE 0 11 17 2 0 0 0 0 30 13.1% 4.2 SE 0 4 31 3 0 0 0 0 38 16.6% 5.2 SSE 0 1 21 1 0 0 0 0 23 10.0% 5.9 S 0 1 4 0 0 0 0 0 5 2.2% 4.5 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 3 0 0 0 0 0 3 1.3% 4.7 WNW 0 3 1 0 0 0 0 0 4 1.7% 3.5 NW 0 2 9 0 0 0 0 0 11 4.8% 4.4 NNW 0 5 12 3 0 0 0 0 20 8.7% 5.3 Total 0 62 146 21 0 0 0 0 229

% Of Total 0.0% 27.1% 63.8% 9.2% 0.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 4.9 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-26

Radioactive Release Effluent Report - RDRJFC South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 4 2 0 0 0 0 0 6 4.4% 2.8 NNE 0 8 7 0 0 0 0 0 15 11.0% 3.3 NE 0 8 4 0 0 0 0 0 12 8.8% 3.0 ENE 0 9 1 0 0 0 0 0 10 7.4% 2.7 E 0 20 3 0 0 0 0 0 23 16.9% 2.9 ESE 0 16 6 0 0 0 0 0 22 16.2% 3.0 SE 0 3 16 0 0 0 0 0 19 14.0% 4.0 SSE 0 1 1 0 0 0 0 0 2 1.5% 3.5 S 0 0 0 0 1 0 0 0 1 0.7% 13.4 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 1 0 0 0 0 0 0 1 0.7% 1.5 W 0 1 0 0 0 0 0 0 1 0.7% 2.2 WNW 0 4 5 0 0 0 0 0 9 6.6% 3.5 NW 0 4 7 0 0 0 0 0 11 8.1% 3.7 NNW 0 1 3 0 0 0 0 0 4 2.9% 3.7 Total 0 80 55 0 1 0 0 0 136

% Of Total 0.0% 58.8% 40.4% 0.0% 0.7% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 3.3 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-27

Radioactive Release Effluent Report - RDRJFCA South Texas Project Third Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 14 47 70 22 7 0 0 160 7.3% 9.3 NNE 0 24 60 65 42 14 0 0 205 9.3% 9.5 NE 0 21 32 37 26 0 0 0 116 5.3% 8.5 ENE 0 14 30 15 25 4 1 0 89 4.0% 9.3 E 0 36 29 22 10 5 1 0 103 4.7% 7.3 ESE 0 30 37 34 22 11 1 1 136 6.2% 9.0 SE 0 11 66 42 33 5 2 0 159 7.2% 9.1 SSE 1 13 66 153 60 3 0 0 296 13.4% 9.8 S 0 1 73 310 89 1 0 0 474 21.5% 10.2 SSW 0 1 47 111 8 0 0 0 167 7.6% 8.9 SW 0 0 12 43 4 0 0 0 59 2.7% 9.1 WSW 0 1 11 2 1 0 0 0 15 0.7% 6.2 W 0 1 11 3 0 0 0 0 15 0.7% 5.7 WNW 0 10 19 4 0 0 0 0 33 1.5% 5.0 NW 0 8 40 11 12 0 0 0 71 3.2% 7.0 NNW 0 7 40 44 11 4 0 0 106 4.8% 8.4 0 0 0 2 0 0 0 0 2 0.1% 10.4 Total 1 192 620 968 365 54 5 1 2206

% Of Total 0.0% 8.7% 28.1% 43.9% 16.5% 2.4% 0.2% 0.0%

Average speed for this table (MPH): 9.1 Hours in above table with variable direction : 0 Total number of CALMs : 1 Total number of Invalid hours : 2 Total number of Valid hours : 2206 Total number of hours for period : 2208 9-28

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER 9-29

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 1 4 11 0 0 0 16 6.0% 12.9 NNE 0 0 5 7 6 3 1 0 22 8.2% 12.9 NE 0 0 2 15 4 0 0 0 21 7.9% 10.3 ENE 0 0 0 4 3 0 0 0 7 2.6% 12.7 E 0 0 0 0 5 0 0 0 5 1.9% 14.5 ESE 0 0 0 0 8 5 0 0 13 4.9% 17.4 SE 0 0 0 5 36 8 7 0 56 21.0% 16.8 SSE 0 0 0 5 12 3 0 0 20 7.5% 14.8 S 0 0 0 23 15 2 0 0 40 15.0% 12.9 SSW 0 0 1 9 0 0 0 0 10 3.7% 10.7 SW 0 0 1 4 0 0 0 0 5 1.9% 9.1 WSW 0 0 1 1 0 0 0 0 2 0.7% 8.3 W 0 0 0 1 0 0 0 0 1 0.4% 9.8 WNW 0 0 2 1 0 0 0 0 3 1.1% 7.1 NW 0 0 3 1 5 4 0 0 13 4.9% 15.2 NNW 0 0 2 5 7 19 0 0 33 12.4% 17.5 Total 0 0 18 85 112 44 8 0 267

% Of Total 0.0% 0.0% 6.7% 31.8% 41.9% 16.5% 3.0% 0.0%

Average speed for this table (MPH): 14.3 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-30

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 0 2 2 0 0 6 4.5% 14.2 NNE 0 0 1 2 1 0 0 0 4 3.0% 10.7 NE 0 0 6 3 1 0 0 0 10 7.5% 7.9 ENE 0 0 5 6 1 0 0 0 12 9.0% 8.4 E 0 0 1 2 3 0 0 0 6 4.5% 13.0 ESE 0 0 3 4 3 2 0 0 12 9.0% 12.5 SE 0 0 0 9 13 2 1 0 25 18.7% 14.9 SSE 0 0 1 1 6 1 0 0 9 6.7% 14.0 S 0 0 2 8 1 0 0 0 11 8.2% 10.0 SSW 0 0 4 6 0 0 0 0 10 7.5% 7.6 SW 0 0 2 1 0 0 0 0 3 2.2% 7.2 WSW 0 0 0 1 0 0 0 0 1 0.7% 9.0 W 0 0 0 1 0 0 0 0 1 0.7% 7.9 WNW 0 0 2 0 0 0 0 0 2 1.5% 5.7 NW 0 0 3 3 1 1 0 0 8 6.0% 9.4 NNW 0 0 1 4 3 5 1 0 14 10.4% 15.7 Total 0 0 33 51 35 13 2 0 134

% Of Total 0.0% 0.0% 24.6% 38.1% 26.1% 9.7% 1.5% 0.0%

Average speed for this table (MPH): 11.7 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-31

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 1 0 1 0 0 4 3.7% 10.6 NNE 0 0 0 2 1 0 0 0 3 2.8% 11.6 NE 0 0 4 2 4 0 0 0 10 9.2% 11.2 ENE 0 0 6 6 1 0 0 0 13 11.9% 7.7 E 0 0 3 3 0 0 0 0 6 5.5% 7.6 ESE 0 0 0 3 5 0 0 0 8 7.3% 14.2 SE 0 0 3 6 9 0 1 0 19 17.4% 12.4 SSE 0 0 1 3 5 0 0 0 9 8.3% 12.7 S 0 0 3 8 4 0 0 0 15 13.8% 10.4 SSW 0 0 1 2 0 0 0 0 3 2.8% 7.8 SW 0 0 2 1 0 0 0 0 3 2.8% 7.6 WSW 0 0 1 1 0 0 0 0 2 1.8% 6.8 W 0 0 1 0 0 0 0 0 1 0.9% 4.4 WNW 0 0 5 0 1 0 0 0 6 5.5% 7.4 NW 0 0 1 0 0 1 0 0 2 1.8% 12.9 NNW 0 0 0 2 0 3 0 0 5 4.6% 16.3 Total 0 0 33 40 30 5 1 0 109

% Of Total 0.0% 0.0% 30.3% 36.7% 27.5% 4.6% 0.9% 0.0%

Average speed for this table (MPH): 10.7 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-32

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 2 14 28 8 0 0 52 11.4% 14.8 NNE 0 0 8 20 13 2 0 0 43 9.5% 11.5 NE 0 0 8 28 11 0 0 0 47 10.3% 10.2 ENE 0 0 12 16 7 0 0 0 35 7.7% 9.6 E 0 2 6 9 12 0 0 0 29 6.4% 10.9 ESE 0 0 1 7 16 2 0 0 26 5.7% 14.3 SE 0 0 0 10 20 7 0 0 37 8.1% 15.5 SSE 0 0 0 14 15 1 0 0 30 6.6% 13.3 S 0 0 7 18 2 0 0 0 27 5.9% 9.0 SSW 0 0 9 4 0 0 0 0 13 2.9% 7.0 SW 0 1 0 1 1 0 0 0 3 0.7% 9.5 WSW 0 0 0 1 1 0 0 0 2 0.4% 15.1 W 0 0 1 0 4 0 0 0 5 1.1% 13.7 WNW 0 0 0 2 2 0 0 0 4 0.9% 11.4 NW 0 1 4 2 5 5 0 0 17 3.7% 13.4 NNW 0 0 3 10 38 17 16 1 85 18.7% 17.8 Total 0 4 61 156 175 42 16 1 455

% Of Total 0.0% 0.9% 13.4% 34.3% 38.5% 9.2% 3.5% 0.2%

Average speed for this table (MPH): 13.2 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-33

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 4 8 1 0 0 0 13 2.4% 9.4 NNE 0 1 5 17 0 0 0 0 23 4.3% 8.2 NE 0 3 20 15 0 0 0 0 38 7.1% 7.1 ENE 0 4 24 11 3 0 0 0 42 7.8% 7.2 E 0 0 10 41 7 0 0 0 58 10.8% 9.8 ESE 0 0 14 39 10 0 0 0 63 11.8% 9.7 SE 0 0 14 32 24 7 0 0 77 14.4% 11.9 SSE 0 1 10 35 25 2 0 0 73 13.6% 11.4 S 0 0 24 25 0 0 0 0 49 9.1% 7.6 SSW 0 0 12 3 0 0 0 0 15 2.8% 6.1 SW 0 1 1 2 0 0 0 0 4 0.7% 6.4 WSW 0 2 1 4 0 0 0 0 7 1.3% 6.8 W 0 1 3 0 5 2 0 0 11 2.1% 12.3 WNW 0 1 2 0 0 0 0 0 3 0.6% 4.7 NW 0 3 11 9 3 0 0 0 26 4.9% 8.0 NNW 0 2 6 14 4 6 2 0 34 6.3% 12.3 Total 0 19 161 255 82 17 2 0 536

% Of Total 0.0% 3.5% 30.0% 47.6% 15.3% 3.2% 0.4% 0.0%

Average speed for this table (MPH): 9.6 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-34

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 3 9 3 0 0 0 0 15 5.4% 5.7 NNE 0 5 16 12 0 0 0 0 33 11.9% 6.6 NE 0 8 21 1 0 0 0 0 30 10.8% 5.0 ENE 0 8 13 2 0 0 0 0 23 8.3% 4.5 E 0 4 26 6 1 0 0 0 37 13.3% 6.1 ESE 0 1 16 4 0 0 0 0 21 7.6% 6.4 SE 0 4 7 17 1 0 0 0 29 10.4% 8.1 SSE 0 2 3 3 0 0 0 0 8 2.9% 6.9 S 0 0 11 0 0 0 0 0 11 4.0% 5.4 SSW 0 2 4 0 0 0 0 0 6 2.2% 5.0 SW 0 0 1 0 0 0 0 0 1 0.4% 6.7 WSW 0 1 5 2 1 0 0 0 9 3.2% 7.0 W 0 0 5 2 0 0 0 0 7 2.5% 5.8 WNW 0 2 7 1 0 0 0 0 10 3.6% 4.7 NW 0 0 11 5 0 0 0 0 16 5.8% 6.2 NNW 0 4 12 6 0 0 0 0 22 7.9% 6.1 Total 0 44 167 64 3 0 0 0 278

% Of Total 0.0% 15.8% 60.1% 23.0% 1.1% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 6.1 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-35

Radioactive Release Effluent Report - RDRJFC South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 8 14 1 0 0 0 0 23 5.8% 4.3 NNE 0 10 45 25 0 0 0 0 80 20.1% 6.0 NE 0 22 66 0 0 0 0 0 88 22.1% 4.1 ENE 0 21 32 0 0 0 0 0 53 13.3% 4.0 E 1 8 24 3 0 0 0 0 36 9.0% 4.8 ESE 0 5 16 0 0 0 0 0 21 5.3% 3.8 SE 0 4 2 2 0 0 0 0 8 2.0% 4.8 SSE 0 3 2 0 0 0 0 0 5 1.3% 3.3 S 1 0 1 0 0 0 0 0 2 0.5% 2.7 SSW 0 1 0 0 0 0 0 0 1 0.3% 1.5 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 2 0 0 0 0 0 2 0.5% 3.6 W 0 0 11 0 0 0 0 0 11 2.8% 5.0 WNW 0 7 15 1 0 0 0 0 23 5.8% 4.3 NW 0 10 12 2 0 0 0 0 24 6.0% 4.4 NNW 0 5 14 2 0 0 0 0 21 5.3% 4.7 Total 2 104 256 36 0 0 0 0 398

% Of Total 0.5% 26.1% 64.3% 9.0% 0.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 4.6 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-36

Radioactive Release Effluent Report - RDRJFCA South Texas Project Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 11 34 31 42 11 0 0 129 5.9% 10.9 NNE 0 16 80 85 21 5 1 0 208 9.6% 8.4 NE 0 33 127 64 20 0 0 0 244 11.2% 6.8 ENE 0 33 92 45 15 0 0 0 185 8.5% 6.7 E 1 14 70 64 28 0 0 0 177 8.1% 8.3 ESE 0 6 50 57 42 9 0 0 164 7.5% 10.3 SE 0 8 26 81 103 24 9 0 251 11.5% 13.2 SSE 0 6 17 61 63 7 0 0 154 7.1% 12.0 S 1 0 48 82 22 2 0 0 155 7.1% 9.4 SSW 0 3 31 24 0 0 0 0 58 2.7% 7.2 SW 0 2 7 9 1 0 0 0 19 0.9% 7.9 WSW 0 3 10 10 2 0 0 0 25 1.1% 7.5 W 0 1 21 4 9 2 0 0 37 1.7% 8.7 WNW 0 10 33 5 3 0 0 0 51 2.3% 5.6 NW 0 14 45 22 14 11 0 0 106 4.9% 8.9 NNW 0 11 38 43 52 50 19 1 214 9.8% 14.2 Total 2 171 729 687 437 121 29 1 2177

% Of Total 0.1% 7.9% 33.5% 31.6% 20.1% 5.6% 1.3% 0.0%

Average speed for this table (MPH): 9.7 Hours in above table with variable direction : 0 Total number of CALMs : 2 Total number of Invalid hours : 31 Total number of Valid hours : 2177 Total number of hours for period : 2208 9-37

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER 9-38

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 0 0 0 0 0 0 0 0.0% 0.0 ENE 0 0 0 0 0 0 0 0 0 0.0% 0.0 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SE 0 0 0 0 1 2 0 0 3 13.6% 19.8 SSE 0 0 0 0 3 13 1 0 17 77.3% 21.0 S 0 0 0 0 1 1 0 0 2 9.1% 18.3 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 0 0 5 16 1 0 22

% Of Total 0.0% 0.0% 0.0% 0.0% 22.7% 72.7% 4.5% 0.0%

Average speed for this table (MPH): 20.6 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-39

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 1 0 0 0 1 25.0% 18.0 NE 0 0 0 0 0 0 0 0 0 0.0% 0.0 ENE 0 0 0 0 0 0 0 0 0 0.0% 0.0 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSE 0 0 0 0 1 0 0 0 1 25.0% 15.1 S 0 0 0 0 2 0 0 0 2 50.0% 15.0 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 0 0 4 0 0 0 4

% Of Total 0.0% 0.0% 0.0% 0.0% 100% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 15.8 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-40

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 0 0 0 0 0 0 0 0.0% 0.0 ENE 0 0 0 0 0 0 0 0 0 0.0% 0.0 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 1 0 0 0 0 1 4.5% 12.3 SE 0 0 0 0 6 3 0 0 9 40.9% 17.4 SSE 0 0 0 1 3 5 0 0 9 40.9% 18.1 S 0 0 1 0 1 0 0 0 2 9.1% 9.8 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 1 0 0 0 0 1 4.5% 11.5 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 1 3 10 8 0 0 22

% Of Total 0.0% 0.0% 4.5% 13.6% 45.5% 36.4% 0.0% 0.0%

Average speed for this table (MPH): 16.5 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-41

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 5 0 0 0 5 3.3% 16.0 NNE 0 0 0 0 9 2 0 0 11 7.2% 16.6 NE 0 0 0 2 8 1 0 0 11 7.2% 13.3 ENE 0 0 1 3 2 0 0 0 6 3.9% 10.4 E 0 0 0 4 1 0 0 0 5 3.3% 10.8 ESE 0 0 3 7 9 2 0 0 21 13.7% 12.4 SE 0 0 1 7 30 5 0 0 43 28.1% 15.2 SSE 0 0 1 2 32 11 0 0 46 30.1% 16.4 S 0 0 1 2 2 0 0 0 5 3.3% 11.2 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 7 27 98 21 0 0 153

% Of Total 0.0% 0.0% 4.6% 17.6% 64.1% 13.7% 0.0% 0.0%

Average speed for this table (MPH): 14.7 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-42

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 1 0 0 0 0 0 1 1.8% 4.5 NNE 0 0 1 2 0 0 0 0 3 5.3% 7.3 NE 0 0 3 0 0 0 0 0 3 5.3% 6.0 ENE 0 0 4 1 0 0 0 0 5 8.8% 7.3 E 0 0 5 6 0 0 0 0 11 19.3% 7.9 ESE 0 0 3 6 0 0 0 0 9 15.8% 8.3 SE 0 0 3 1 5 0 0 0 9 15.8% 12.7 SSE 0 0 2 8 3 1 0 0 14 24.6% 11.7 S 0 0 0 2 0 0 0 0 2 3.5% 7.7 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 22 26 8 1 0 0 57

% Of Total 0.0% 0.0% 38.6% 45.6% 14.0% 1.8% 0.0% 0.0%

Average speed for this table (MPH): 9.4 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-43

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 0 0 0 0 0 0 0 0.0% 0.0 ENE 0 1 0 0 0 0 0 0 1 16.7% 3.2 E 0 2 0 0 0 0 0 0 2 33.3% 3.2 ESE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SE 0 1 0 2 0 0 0 0 3 50.0% 7.2 SSE 0 0 0 0 0 0 0 0 0 0.0% 0.0 S 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 4 0 2 0 0 0 0 6

% Of Total 0.0% 66.7% 0.0% 33.3% 0.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 5.2 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-44

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-45

Radioactive Release Effluent Report - RDRJFBA South Texas Project Batch Release First Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 01/01/2020 00:00 To : 03/31/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 1 0 5 0 0 0 6 2.3% 14.1 NNE 0 0 1 2 10 2 0 0 15 5.7% 14.9 NE 0 0 3 2 8 1 0 0 14 5.3% 11.7 ENE 0 1 5 4 2 0 0 0 12 4.5% 8.5 E 0 2 5 10 1 0 0 0 18 6.8% 8.2 ESE 0 0 6 14 9 2 0 0 31 11.7% 11.2 SE 0 1 4 10 42 10 0 0 67 25.4% 15.0 SSE 0 0 3 11 42 30 1 0 87 33.0% 16.7 S 0 0 2 4 6 1 0 0 13 4.9% 12.1 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 1 0 0 0 0 1 0.4% 11.5 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 4 30 58 125 46 1 0 264

% Of Total 0.0% 1.5% 11.4% 22.0% 47.3% 17.4% 0.4% 0.0%

Average speed for this table (MPH): 14.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 264 Total number of hours for period : 264 9-46

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER 9-47

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 0 0 1 0 0 0 1 20.0% 16.1 ENE 0 0 0 0 0 0 0 0 0 0.0% 0.0 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSE 0 0 0 0 0 0 0 0 0 0.0% 0.0 S 0 0 0 2 0 0 0 0 2 40.0% 8.7 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 2 0 0 0 0 2 40.0% 8.6 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 0 4 1 0 0 0 5

% Of Total 0.0% 0.0% 0.0% 80.0% 20.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 10.1 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-48

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 0 0 0 0 0 0 0 0.0% 0.0 ENE 0 0 0 0 2 0 0 0 2 33.3% 17.6 E 0 0 0 0 1 0 0 0 1 16.7% 18.3 ESE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSE 0 0 0 0 0 0 0 0 0 0.0% 0.0 S 0 0 0 3 0 0 0 0 3 50.0% 9.2 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 0 3 3 0 0 0 6

% Of Total 0.0% 0.0% 0.0% 50.0% 50.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 13.5 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-49

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 0 0 2 0 0 0 2 15.4% 15.3 ENE 0 0 0 0 0 0 0 0 0 0.0% 0.0 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 0 0 1 0 0 1 7.7% 20.5 SE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSE 0 0 0 0 0 0 0 0 0 0.0% 0.0 S 0 0 2 3 0 0 0 0 5 38.5% 9.3 SSW 0 0 2 2 0 0 0 0 4 30.8% 7.5 SW 0 0 0 1 0 0 0 0 1 7.7% 8.4 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 0 4 6 2 1 0 0 13

% Of Total 0.0% 0.0% 30.8% 46.2% 15.4% 7.7% 0.0% 0.0%

Average speed for this table (MPH): 10.5 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-50

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 1 4 5 0 0 10 17.5% 17.5 NNE 0 0 0 0 4 0 0 0 4 7.0% 15.6 NE 0 0 1 1 1 0 0 0 3 5.3% 9.6 ENE 0 0 0 1 0 0 0 0 1 1.8% 9.8 E 0 1 1 2 6 0 0 0 10 17.5% 11.7 ESE 0 0 0 5 5 2 0 0 12 21.1% 13.9 SE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSE 0 0 1 0 0 0 0 0 1 1.8% 6.8 S 0 0 2 3 0 0 0 0 5 8.8% 7.9 SSW 0 0 4 1 0 0 0 0 5 8.8% 6.8 SW 0 0 4 0 0 0 0 0 4 7.0% 6.1 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 2 0 0 0 2 3.5% 14.7 Total 0 1 13 14 22 7 0 0 57

% Of Total 0.0% 1.8% 22.8% 24.6% 38.6% 12.3% 0.0% 0.0%

Average speed for this table (MPH): 12.2 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-51

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 4 1 0 0 0 0 5 8.1% 7.0 NNE 0 0 1 1 1 0 0 0 3 4.8% 9.7 NE 0 1 2 2 1 0 0 0 6 9.7% 8.6 ENE 0 0 2 3 0 0 0 0 5 8.1% 8.0 E 0 2 0 2 1 0 0 0 5 8.1% 7.9 ESE 0 0 1 0 0 0 0 0 1 1.6% 5.8 SE 0 0 2 1 0 0 0 0 3 4.8% 5.6 SSE 0 0 8 0 0 0 0 0 8 12.9% 5.4 S 0 0 13 0 0 0 0 0 13 21.0% 5.7 SSW 0 0 9 0 0 0 0 0 9 14.5% 5.5 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 2 0 0 0 0 0 2 3.2% 5.1 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 1 0 1 0 0 0 2 3.2% 9.6 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 3 45 10 4 0 0 0 62

% Of Total 0.0% 4.8% 72.6% 16.1% 6.5% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 6.7 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-52

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNE 0 0 0 0 0 0 0 0 0 0.0% 0.0 NE 0 0 1 0 0 0 0 0 1 33.3% 5.2 ENE 0 0 1 0 0 0 0 0 1 33.3% 5.2 E 0 0 0 0 0 0 0 0 0 0.0% 0.0 ESE 0 0 0 0 0 0 0 0 0 0.0% 0.0 SE 0 1 0 0 0 0 0 0 1 33.3% 3.4 SSE 0 0 0 0 0 0 0 0 0 0.0% 0.0 S 0 0 0 0 0 0 0 0 0 0.0% 0.0 SSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 SW 0 0 0 0 0 0 0 0 0 0.0% 0.0 WSW 0 0 0 0 0 0 0 0 0 0.0% 0.0 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 Total 0 1 2 0 0 0 0 0 3

% Of Total 0.0% 33.3% 66.7% 0.0% 0.0% 0.0% 0.0% 0.0%

Average speed for this table (MPH): 4.6 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-53

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-54

Radioactive Release Effluent Report - RDRJFBA South Texas Project Batch Release Second Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 04/01/2020 00:00 To : 06/30/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 4 2 4 5 0 0 15 10.3% 14.0 NNE 0 0 1 1 5 0 0 0 7 4.8% 13.1 NE 0 1 4 3 5 0 0 0 13 8.9% 10.2 ENE 0 0 3 4 2 0 0 0 9 6.2% 10.0 E 0 3 1 4 8 0 0 0 16 11.0% 10.9 ESE 0 0 1 5 5 3 0 0 14 9.6% 13.8 SE 0 1 2 1 0 0 0 0 4 2.7% 5.1 SSE 0 0 9 0 0 0 0 0 9 6.2% 5.6 S 0 0 17 11 0 0 0 0 28 19.2% 7.3 SSW 0 0 15 3 0 0 0 0 18 12.3% 6.3 SW 0 0 4 3 0 0 0 0 7 4.8% 7.1 WSW 0 0 2 0 0 0 0 0 2 1.4% 5.1 W 0 0 0 0 0 0 0 0 0 0.0% 0.0 WNW 0 0 0 0 0 0 0 0 0 0.0% 0.0 NW 0 0 1 0 1 0 0 0 2 1.4% 9.6 NNW 0 0 0 0 2 0 0 0 2 1.4% 14.7 Total 0 5 64 37 32 8 0 0 146

% Of Total 0.0% 3.4% 43.8% 25.3% 21.9% 5.5% 0.0% 0.0%

Average speed for this table (MPH): 9.5 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 146 Total number of hours for period : 146 9-55

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER 9-56

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-57

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-58

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-59

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-60

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-61

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-62

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-63

Radioactive Release Effluent Report - RDRJFBA South Texas Project Batch Release Third Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 07/01/2020 00:00 To : 09/30/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH):

Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-64

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER 9-65

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS A Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-66

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS B Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-67

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS C Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-68

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS D Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-69

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS E Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-70

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS F Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-71

Radioactive Release Effluent Report - RDRJFB South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER STABILITY CLASS G Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH): 0.0 Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-72

Radioactive Release Effluent Report - RDRJFBA South Texas Project Batch Release Fourth Quarter 2020 Joint Frequency Tables Joint Frequency Table - Batch Release Hours From : 10/01/2020 00:00 To : 12/31/2020 23:00 PRIMARY TOWER ALL STABILITY CLASSES COMBINED Wind Speed (1) (2) (3) (4) (5) (6) (7) (8)

(MPH) -> CALM 1.0 3.6 7.6 12.6 18.6 24.6 32.6 + Total % Of Avg.

- 3.5 - 7.5 - 12.5 - 18.5 - 24.5 - 32.5 Total Sector Speed N 0 0 0 0 0 0 0 0 0 ****** 0.0 NNE 0 0 0 0 0 0 0 0 0 ****** 0.0 NE 0 0 0 0 0 0 0 0 0 ****** 0.0 ENE 0 0 0 0 0 0 0 0 0 ****** 0.0 E 0 0 0 0 0 0 0 0 0 ****** 0.0 ESE 0 0 0 0 0 0 0 0 0 ****** 0.0 SE 0 0 0 0 0 0 0 0 0 ****** 0.0 SSE 0 0 0 0 0 0 0 0 0 ****** 0.0 S 0 0 0 0 0 0 0 0 0 ****** 0.0 SSW 0 0 0 0 0 0 0 0 0 ****** 0.0 SW 0 0 0 0 0 0 0 0 0 ****** 0.0 WSW 0 0 0 0 0 0 0 0 0 ****** 0.0 W 0 0 0 0 0 0 0 0 0 ****** 0.0 WNW 0 0 0 0 0 0 0 0 0 ****** 0.0 NW 0 0 0 0 0 0 0 0 0 ****** 0.0 NNW 0 0 0 0 0 0 0 0 0 ****** 0.0 Total 0 0 0 0 0 0 0 0 0

% Of Total ******** ******** ******** ******** ******** ******** ******** ********

Average speed for this table (MPH):

Hours in above table with variable direction : 0 Total number of CALMs : 0 Total number of Invalid hours : 0 Total number of Valid hours : 0 Total number of hours for period : 0 9-73

ML21110A153

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