Text

Annual Radioactive Effluent Release Report
	ML16130A565
Person / Time
Site:	River Bend
Issue date:	05/02/2016
From:	Huffstatler K; Entergy Operations
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	RBF1-16-0056, RBG-47682
	Download: ML16130A565 (74)
	v • d • e

Entergy Operations, Inc:

River Bend Station 5485 U.S. Highway 61 N

'- St. Francisville, LA 70775 Tel 225-378-3305 Kristi Huffstatler Acting Manager-Regulatory Assurance May 2, 2016 U.S. Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852-2738 RBG-47682 RBF1-16-0056

Subject:

Annual Radioactive Effluent Release Report River Bend Station -:. Unit 1 License No. NPF-47 Docket No. 50-458

Dear Sir or Madam,

. Enclosed is the River Bend Station (RBS) Annual Radioactive Effluent Release Report for 2015 for the period January 1, 2015 through December 31, 2015. This report is submitted in accordance with the RBS Technical Specifications, Section 5.6.2.

Should.you have any questions regarding the enclosed, please contact Kristi Huffstatler, at (225) 378-3305.

Sincerely,

~~~~

KRH/tjb enclosure

Annual Radioactive. Effluent Release Report RBG-47682 i Page 2 of 2 cc: U.S. Nuclear Regul~tory Commission Region IV 1600 E. Lamar Blvd.

Arlington, TX 76011-4511 NRC Resident Inspector (w/o)

PO Box 1050 St. Francisville, LA 70775 Records Clerk (w/o)

Public Utility Commission of Texas 1701 N. Congress Ave.

Austin Texas 78711-13326 Mr. Stephen S. Koenick, Project Manager (w/o)

U.S. Nuclear Regulatory Commission MS 8 B1A .

One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738

River Bend Station 2015 Annual Radiological Effluent Relcuse Report Pagel of72 RIVER BEND STATION 2015 ANNUAL RADIOLOGICAL EFFLUENT RELEASE REPORT REVIEWEDBY: w/L~.V--

William~pell I Senior HP/Chem Specialist ruiVIEWED BY~(Jl?alld

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Shannon C. Peterkin I Radiation Protection Manager L( ~ $0-/ 6 APPROVED BY:---'"'----=-->.:;:--~~~===:::::::-~~~~~~~

River Bend Station 2015 Annual Radiologis_al Effluent Release Report Page 2 of72 Table of Contents I. SUPPLEMENTAL INFORMATION..**.......** ;******..***********.****.*.............*.*.........*..****.****.* 4 II. GASEOUS EFFLUENT

SUMMARY

INFORMATION ............................................... 12 ID. LIQUID EFFLUENT

SUMMARY

INFORMATION.................................................... 12 IV. SOLID WASTE ................................................................ ,...*..*....*...***.**...*....*..***.**.*****. 12 V. RADIOLOGICAL IMPACT ON MAN (40CFR190) ..................................................... 12 VI. METEOROLOGICAL DATA. ......................................................................,******..*.****** 13 VII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY .............................................................................................................. 14 VIII. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY .............................................................................................................. 14 IX. LIQUID HOLD UP T ANKS ........................................................................................... 14 X. RADIOLOGICAL ENVIRONMENTAL MONITORING **.. ;....................................... 14 XI. LAND USE CENSUS ....................................,.................................................................. 14 XII. OFFSITE DOSE CALCULATION MANUAL (ODCM)*.*****.*..****........*.,...................... 14 XIII. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS .............................................................................................. 15 XIV. PROCESS CONTROL PROGRAM (PCP) .................................................................... 16 XV. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI)- FINAL GUIDANCE DOCUMENT (NEI 07-07) OBJECTIVE ANNUAL REPORTING ......... 17 TABLElA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES ................................ 19 TABLElB GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE ............. 20 TABLElC GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE ......................... 21 TABLElD GASEOUS EFFLUENTS - MIXED MODE RELEASES- CONTINUOUS MODE .... 22 TABLElE SUPPLEMENTAL INFORMATION GASEOUS EFFLUENTS - BATCHMODE ..... 23 TABLElF RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM..... 24 TABLElG 2015 GASEOUS ANNUAL DOSE

SUMMARY

REPORT............................................ 25 TABLE2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES .................................... 26 TABLE2B LIQUID EFFLUENTS- CONTINUOUS MODE .......................................................... 27 TABLE2C LIQUID EFFLUENTS-BATCH MODE ...................................................................... 28 TABLE2E RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM ........ 30 TABLE2F LIQUID ANNUAL DOSE

SUMMARY

REPORT ......................................................... 31 TABLE3 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2015 YEAR ................... 32 TABLE4 MEMBERS OF THE PUBLIC ON SITE DOSE ............................................................ 34 TABLES 2015 YEAR METEOROLOGICAL DATA- JOINT FREQUENCY TABLES ............ 36

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 3 of72 TABLE 6 ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DOSE CALCULATIONS ..............................................:........................ 53 TABLE 7 GROUNDWATER MONITORING WELL SAMPLE RESULTS .................................. 54 ATTACHMENT 1-2013 TABLE 3 REVISED ..................................................................................... 69

River Bend Station 2015 Annual Radiological Effluent Release Report Page 4of72 This is the Annual Radioactive Effluent Release Report for the period of January 1, 2015, through December 31, 2015. This report is submitted in accordance with Technical Specification 5.6.3 of Appendix A to River Bend Station (RBS) License Number NPF-47.

A corrected Solid Waste and Irradiated Fuel Shipments table from the 2013 Annual Radioactive Effluent Release Report is included in Attachment 1.

I. SUPPLEMENTAL INFORMATION A Regulatory Limits

1. 10CFR50, Appendix I Limits a) Fission and Activation Gases In accordance with Technical Requirement (TR) 3.11.2.2, the air dose due to noble gases released in gaseous effluent to areas at and beyond the SITE BOUNDARY shall be limited to:

Daamma-Air = gamma air dose from radioactive noble gases in millirad (mrad) n 3.17E-8 L Mi(X/Q) Qi .::; 5 mrads/qtr i= 1 .::; 10 mrads/yr DBeta-Air =beta air dose from radioactive noble gases in millirad (mrad) n (

3. l 7E-8 L Ni (X/Q) Qi .::; 10 mrads/qtr i= 1 .::; 20 mrads/yr b) Radioiodines (I-131 & I-133) and Particulate In accordance with Technical Requirement 3.11.2.3, the dose -to a Iv1EMBER OF THE PUBLIC from tadioiodines (I-131 and I-133), tritium (H-3) and all radionuclides in particulate form with half-lives greater than 8 days, in gaseous effluent releases to areas at and beyond the SITE BOUNDARY shall be limited to:

D1&sDPi: = Pose in mrem to the organ (i') for the age group of interest from radioiodine (I-131, I-133, tritium, and 8 day particulate via the

River Bend StatiJi; 2015 Annual Radiological Effluent Release Report Page 5 of72 pathway of interest.)

n 3.17E-08 (Fo) L i=l n

3.17E-08 (F~) L RT (D/Q) Qi and i=l n

DT L Dr&sDPT * :S 7 .5 mrem/qtr z=l : : .; 15 mrem/yr (above terms defined in the RBS ODCM) c) Liquid Effluent In accordance with Technical Requirement 3.11.1.2, the dose or dose commitment to a MEMBER OF THE PUBLIC from radioactive materials in liquid effluent released to UNRESTRICTED AREAS shall be limited to:

Aii~

(DF) Dw DrnrALT =Total dose commitment to the organ ('t) due to all releases during the desired time interval in mrem and DrnrAL Total Body < 1.5 mrem/qtr

< 3 mrem/yr DrorAL AiiyOrgan -< 5 mrem/qtr

< 10 mrem/yr (above terms defined in RBS ODCM)

River Bend Station 2015 Annual Radiological Effluent Release Report Page 6 of72

- 2. 40CFR190 Limits In accordance with Technical Requirement 3.11.4, the annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to:

< 25 mrem to the total body or any ~rgan (except the thyroid)

< 75 mrem to the thyroid

3. Miscellaneous Limits

a. Technical Requirement 3.11.2.l - Fission and. Activation Gases In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioactive materials released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be less than or equal to 500 millirems/year (mrem/yr) to the total body and less than or equat to 3000 mrem/yr to the skin:

DRTB= Dose rate to the total body in mrem/yr n

L Ki (X/Q) Qi :::; 500 mrem/yr and i=l DRsKIN= Dose rate to the skin in mrem/yr n

L Li+ l.lMi (X/Q) Qi :::; 3000 mrem/yr i=l (above terms defined in RBS ODCM)

b. Technical Requirement 3.11.2.l - Radioiodine (I-Bl & 1-133) and Particulate In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioiodines, tritium, and all radionuclides in particulate form with half-lives greater than 8 days released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be .limited to less than or equal to 1500 mrem/yr to any organ:

River Bend Station 2015 Annual Radiological EffiuentRelease Report Page 7 of72 DR1&sDP't = Dose rate to the organ -r for the age pathway group of interest from Radioiodines (I-131 & I-133), tritium, and 8 day particulate via the inhalation pathway in mrem/yr.

n DR1&8DP't = L Pi (X/Q) Qi ~ 1500 mrem/yr i=l (above terms defined in RBS ODCM)

c. Technical Requirement 3 .11.1.1 - Liguid Effluent In accordance with Technical Requirement 3 .11.1.1, the concentration of radioactive material released in liquid

effluent to UNRESTRICTED AREAS shall be limited to ten times the concentrations specified in 10CFR20, Appendix B, Table 2, 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 microcuries/milliliter total concentration.

d. Technical Requirement 3.11.2.5 - Ventilation Exhaust Treatment In accordance with Technical Requirement 3 .11.2.5, the VENTILATION EXHAUST TREATMENT SYSTEM shall be used to reduce radioactive materials in gaseous waste prior to their discharge when the projected doses, due to gaseous effluent releases to areas and beyond the SITE BOUNDARY would exceed 0.3 mrem to any organ in a 31-dayperiod.

e. Technical Requirement 3.11.1.3 - Liguid Radwaste Treatment System In accordance with Technical Requirement 3.11.1.3, the liquid radwaste treatment system shall be used to reduce the radioactive materials in liquid waste prior to their discharge when the projected doses, due to the liquid effluent, to UNRESTRICTED AREAS would exceed 0.06 mrem to the total body or 0.2 mrem to any organ in a 31-day period.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 86f72 B. Effluent Concentration Limits

1. Gaseous Releases The concentrations of radioactive gaseous releases are based on the dose rate restrictions in RBS Technical Requirements, rather than the Effluent Concentration Limits (ECL) listed in 10CFR20 Appendix B, Table 2, Column 1.

2. Liquid Releases The Effluent Concentration Limits of radioactive materials in liquid effluents are limited to ten times 10CFR20, Appendix B, !able 2, Column 2.

C. Measurements and Approximations of Total Radioactivity

1. Gaseous Effluent

a. Fission and Activation Gases Periodic grab samples are obtained from the Main Plant Exhaust Duct, Fuel Building Exhaust Vent and Radwaste Building Exhaust Vent. These samples are analyzed using high purity germanium detectors coupled to computerized pulse height analyzers. The sampling and analysis frequencies are described in Table IF.

Sampling and analysis of these effluent streams provide noble gas radionuclide relative abundance that can then be applied to the noble gas gross activity and gross activity release rate to obtain nuclide specific activities and release rates. The noble gas gross activity released within a specific time period is determined by integrating the stack monitor release rate over the considered time period. If no activity was detected between the stack grab sample and a significant increase in hourly averages was recorded, the nuclide relative abundance of the last sample (or the last similar event), which indicated the presence ofactivity, was used to obtain nuclide specific activities. Correction factors for the monitors are derived and applied for each sampling period whenever noble gas radionuclides are detected in the effluent stream.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 9of72

b. Particulate and Radioiodine (l-131 & I-133)

Particulates, Iodine-131 and Iodine-133 are continuously sampled from the' three release points using a particulate filter and charcoal cartridge in line with a sample pump (stack monitor pump). These filters and charcoal cartridges are removed and analyzed in accordance with the frequencies specified in Table IF. Analysis is performed to

. identify and quantify radionuclides using high purity germanium detectors coupled to computerized pulse height analyzers. Given the nuclide specific activity concentrations, process flow rate, and duration of the sample, the nuclide specific activity released to the environment can be obtained. Due to the continuous sampling process, it is assumed that

the radioactive material is released to the environment at a .constant rate within the sampling period. Strontium-89 and Strontium-90 (Sr-89 and Sr-90) are quantitatively analyzed

by counting by gas flow proportional counting. Gross alpha analysis is performed using a zmc sulfide scintillation counter.

c. Tritium Tritium grab samples are obtained from the three gaseous

. release points at the specified frequencies listed in Table IF

'using an ice bath condensation collection method. The collected sample is then analyzed using a liquid scintillation counter.. Given the tritium concentration, process flow rate, and time period for which the sample is obtained, the tritium activity released to the environment c~n be determined. Due to the frequency of sampling, it is assumed that the tritium is released to the environment at a constant rate within the time period for which the sample is obtained.

d. Carbon-14 (C-14)

C-14 release details are discussed in Section VI.

e. Nickel-63 No Nickel-63 was quantified in 2015.

River Bend Station 2015 Annual Radiological Effiuent Release Report Page 10 of72

2. Liquid Effluent Representative grab samples are* obtained from the appropriate sample recovery tank and analyzed prior to release of the tank in accordance with the frequencies listed in Table 2E. Analysis for gamma emitting nuclides (including dissolved and entrained noble gases) is performed using a high purity germanium detector coupled to a computerized pulse height analyzer. Tritium concentration is determined using a liquid scintillation counter.

Strontium-89 and Strontium-90 are quantitatively analyzed by scintillation techniques (Cherenkov counting). Iron-55 is counted with a liquid scintillation counter after digestion of the iron. Gross

~lpha analysis is performed using a zinc sulfide scintillation counter. The activity of each nuclide released to the environment is determined from the nuclide specific' concentration and total tank volume released.

D .. Batch Releases

1. Liquid Effluents Batch releases and rece1vmg stream flow from River Bend Station during the reporting period of January 1, 2015, through becember 31, 2015 are shown in Table 2D.

The Mississippi River stream flow is obtained by averaging data from the U. S. Army Corp of Engineers website using flow gauge data at Tarbert Landing.

2. Gaseous Effluents There were no routine batch releases of gaseous effluents from River \

Bend Station during the reporting period of January 1, 2015, through December 31, 2015.

E. Abnormal Releases There were no abnormal releases in 2015.

\

River Bend Station 2015 Annual Radiological Effluent Release Report Page 11 of72 F. Estimate of Total Error

1. Liquid I

The maximum error associated with sample collection, laboratory .

analysis, and discharge volume is collectively estimated to be:

Fission and Activation Products -+ 14.2%

Tritium I

-+ 14.2%

Dissolved and Entrained Noble Gases -+ 14.2%

Gross Alpha Radioactivity -+ 14.2%

2. Gaseous The maximum error (not including sample line loss) associated with sample flow, process flow, sample collection, 'monitor accuracy and laboratory analysis are collectively estimated to be:

Noble Gases +/- 37.0%

Iodines -+ 18.6%

Particulate -+ 18.6%

Tritium -+ 18.2%

3. Determination of Total Error The total error (i.e., collective error due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.) is calculated using the following equation:

where:

ET = total error E 1, E 2 *** En= individual errors due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 12 of72 II. GASEOUS EFFLUENT

SUMMARY

INFORMATION Refer to the Table 1 series for the summation of gaseous releases. It should be noted that an entry of "O.OOE+OO" Curie (Ci) or microcurie/second (uCi/sec) in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table IF. Also, any nuclide not appearing in the tables was< LLD for all four quarters.

ill. LIQUID EFFLUENT

SUMMARY

INFORMATION Refer to the Table 2 series for the summation ofliquid releases. It should be noted that an entry of "O.OOE+OO" Ci or uCi/ml in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table 2E. Also, any nuclide not appearing in the tables was< LLD for all four quarters.

IV. SOLID WASTE Refer to Table 3, for Solid Waste and Irradiated Fuel Shipments.

V. RADIOLOGICAL IMPACT ON MAN (40CFR190)

An assessment (see summary below) was made of radiation doses to the likely most-exposed member of the public from River Bend and other nearby uranium fuel cycle sources (none within five miles). The annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to less than or equal to 25 mrem to the total body or any organ, except the thyroid, which shall be limited to less than or equal to 75 mrem.

Carbon-14 (C-14)

The bounding annual dose from C-14 was calculated using guidance from Regulatory Guide 1.21, Revision 2, NUREG-0016, and the methodology in Regulatory Guide 1.109. The C-14 source term of 11 curies was taken from the site calculation PR(C)-359-3A, Gaseous Releases per NUREG-0016 Revision 1.

Carbon-14 does not have dose factors associated with standing on contaminated

\ ground; therefore, no ground plane dose was calculated. There is no milk pathway within five miles of River Bend Station so this pathway is not evaluated. RBS does not take credit for decay in the X/Q. This calculation assumes the inhalation, meat and vegetation pathways are at the site boundary in the sector with the highest X/Q.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 13 of72 The dose from liquid effluents is not calculated as the dose contribution from C-14 is considered to be insignificant as indicated in Regulatory Guide 1.21, Revision 2.

According to EPRI 1021106, Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents, 95% of the carbon released is in the form of carbon dioxide and this contributes the highest dose to man. The ingestion pathway, specifically vegetation, is the most likely route of intake for man. An assumption has been made for gaseous releases that plants obtain all of their C-14 from carbon dioxide.

Dose not including C-14:

Organ mrem Total Body 4.53E-01 Thyroid 6.53E-01 Other Organ 4.53E-01 Skin 6.53E-01 Bounding Dose from C-14 only:

Organ mrem Total Body 9.39E-01 Skin O.OOE+OO Thyroid 9.39E-01 Other Organ (bone) 4.70E+OO In addition, an assessment of doses was made for members of the public due to their activities inside the site boundary can be found in Table 4. The maximally exposed member of the public was an employee staying at RBS during the week and is conservatively calculated to have stayed at least four days per week for 34 weeks. It should be noted that liquid effluent pathway dose was not considered since these individuals would not engage in activities that would allow exposure to this pathway.

VI. METEOROLOGICAL DATA See Tables 5 and 6 for the cumulative joint frequency distributions and annual average data for continuous releases. The meteorological recovery for 2015 was 91.4%.

Rivet Bend Station 2015 Annual Radiological Eftlueut Release Report Page 14 of72 VII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.2-1 ofTechnical Requirement 3.3.11.2 were, if inoperable at anytime in the period January 1, 2015, through December 31, 2015, restored to operable status within the required time.

VIII. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.3-1 ofTechnical Requirement 3.3.11.3 were, if inoperable at anytime in the period January 1, 2015, through December 31, 2015, restored to operable status within the required time.

\

IX. LIQUID HOLD UP TANKS The maximum quantity of radioactive material; excluding tritium and dissolved or entrained noble gases, contained in any unprotected outdoor tank puring the period of January 1, 2015, through December 31, 2015 was less than or equal to the 10 curie limit as required by Technical Specification 5.5.8.b. '

X. RADIOLOGICAL ENVIRONMENTAL MONITORING There were no changes to the Radiological Environmental Monitoring Program during the reporting period January 1, 2015, through December 31, 2015.

XI. LAND USE CENSUS No land use census was. performed in 20.15.

XII. OFFSITE DOSE CALCULATION MANUAL (ODCM)

There were no changes to the ODCM in 2015.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 15 of72 XIII. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS Engineering has performed a review of the Asset Suite database to evaluat~ non-administrative design changes completed or partially completed during 2bl 5 involving the subject systems (i.e. changes classified as evaluations or nuclear changes). These design changes were then reviewed to determine if there have been any major changes to the subject systems. The review was based on a major

'change being defined as a modification which affected the method of processing or the effluent from the system. *Also, to be a "major change" the change must have

affected the Updated Safety Analysis Report (USAR).

The Engineering Changes (~C's) to liquid, so lid or gaseous radwaste systems implemented during this time period were:

EC-45515 TMOD Rev. 1 - A revision was created to EC-45515 as it expired on 4/15/15. This TMOD provides the needed information to cross-connect the Reactor Plant Component Cooling Water (RPCCW) system to the Liquid Radioactive Waste (LWS) system. TMOD EC-45515 Rev. 0 was documented in the 2013 Engineering Annual Effluent Report input and determined that this change does not constitute a major change to either the liquid, soi.id, or gaseous radwaste treatment systems. This TMOD has been removed and the EC closed on 7/6/15.

EC-58746 Rev. 0 - This design change replaces* an obimlete analog temperature .

indicating controller (TIC) N64-TICR032A with a digital controller. The TIC is designed to provide control of the temperature of the Offgas Dryer regeneration process from 0 to 500°F.

EC-57673 TMOD Rev. 0 - This TMOD allowed the temporary disconnecting of heating elements in OFG-H2A, Off-gas Building Dryer .Heater that were causing ground faults. This mod was installed on 5/21/lS and removed on 7/1/15.

EC-58382 EVAL Rev. 0 - This EC provides an "Accept As-Is" determination of fan be~ing tolerances based upon the short term period that the degraded OFG-FN3A will remain in service until scheduled replacement with a new blower skid per EC-58276. ,

No EC was identified as* being completed during this time 'period that modified any radioactive waste* system major component such that the processing method or effluent was changed. Also no c4anges were identified affecting the method of processing solid, liquid or gaseous waste or the isotopic composition or the quantity of liquid, solid, or gaseous waste as described in the USAR.

/ '

In conclusion, no design changes were completed during the specified time period that constituted a major change to either the liquid, solid or gaseous radwaste treatment systems.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 16 of72 XIV. PROCESS CONTROL PROGRAM (PCP)

Changes to the Process Control Program (PCP) and supporting procedures in 2015 are summarized below:

EN-RW-105, Process Control Program", Revision 5:

The primary purpose of this revision is to clarify waste ownership in Step 5.l[l](b) and added a new step 5.9[2] (same as step 5. l[l](b)).

Other changes included removing references to Vermont Yankee from the procedure because fleet procedures no longer apply to Vermont Yankee, reformatted table and updated the cross references in Section 8 for compliance with the procedure writer's manual (EN-AD-101-01).

EN-RW-102, "Radioactive Shipping Procedure", Revision 12:

This revision is to add reference to 10 CPR 37 and IER 11-i. Reword Step 5.1.2 for clarity, add step 5.1.3 regarding additional lead time for category 1 and 2 materials. Add step 5.2 for interface with EN-RW-106 updated section 8.0 to reflect insertion of new step and subsequent renumbering of steps. *Edited attachments for clarity and statements about special nuclear material and finally removed VY from coversheet EN-RW-102, "Radioactive Shipping Procedure", Revision 13:

The primary purpose of this revision is to improve the process regarding the notification of Reactor Engineering of non-waste shipments containing special nuclear material. In Attachments 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, and 9.9, the reference to NRC Form 540/541 was replaced with "the manifest." Also updated various site specific commitments (Section 8) as follows:

Updated information provided by the GGNS Commitment Review

Added missing document numbers for W3 and RBS

Added commitment number for GGNS entry in section 8 regarding GNRI-92/00195

Deleted W3 commitment P-11757 from section 8 per V(3 Commitment Review response EN-RW-104, "Scaling Factors", Revision 11:

Revised step 5.2[2](a) 2nd bullet adding a W3 waste stream sampling method.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 17 of72 EN-RW-104, "Scaling Factors, Revision 12:

This revision was an editorial revision to remove reference to a specific version number of RADMAN software and instead reference the current RADMAN software version. In addition, references to Vermont Yankee were removed from the coversheet EN-RW-106, Integrated Transportation Security Plan", Revision 4:

The changes in EN-RW-106 involves administrative changes that deletes an old attachment ,and creates three additional attachments for each type of category of shipment class (Class 1 2 and 3) and subsequent steps changed to reflect the new

.attachments. The change also added responsibility for the training manager to ensure proper development and implementation for the key elements of hazardous materiaJ and 10CFR37.43(c) requirements. EN-RW-106 does not impact the program described in the Nuclear Security safeguards information, as defined in 10CFR37. A Iiew step requiring an annual review of transportation security plans for carriers 'under contract was added. Two steps in the responsibilities section were deleted to clarify that Plant Security was not responsible for transportation security.

XV. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI) -FINAL GUIDANCE DOCUMENT (NEI 07-07) OBJECTIVE ANNUAL REPORTING Ground water samples were taken in support of the GPI. These samples are not part of the Radiological Environmental Monitoring Program. The sample results for 2015 are located in Table 7.

River Bend Station made one NEI 07-07 voluntary notification in August 2015, which is included here per NEI 07-07 Objective 2.4.c. This notification was made based on a spill inside the Turbine Building with the potential to reach groundwater. A valving error caused an estimated spill of 60,000 gallons inside the Turbine Building on the 67-foot elevation. Some floor joints in the Turbine Building are thought to be deteriorated to a point where some liquid could seep through to the soil and subsequently to the groundwater. If any water seeped through these joints our geologist estimates that due to decay, dilution and dispersion the activity present is not likely to be detected in the Mississippi River if it were to infiltrate to the Upland Terrace Aquifer and migrate offsite.

The potential offsite impact was reviewed. The Upland Terrace Aquifer is the closest aquifer beneath the site. The Upland Terrace Aquifer is hydrologically

River Bend Station 2015 Annual Radiological Effluent Release Report Page 18 of72 connected to the Mississippi River Alluvial aquifer, and then to the Mississippi River, approximately two miles west of the facility. The site conceptual hydrology model indicates a down-gradient flow generally to the southwest from the Turbine Building to the Mississippi River is entirely on River Bend Station property. River Bend Station site does not utilize ground water for drinking water use, and the nearest known drinking water user from the Mississippi River is many miles downstream below Baton Rouge, Louisiana. The most recent information River Bend Station has is all neighbors surrounding the station use the parish water supply for their primary ~ource of drinking water. Intakes in the Mississippi River for the parish water supply are not downgradient of River Bend Station. Due to the significant dilution volume of the Mississippi River, there would not be any meaningful dose impact offsite.

f

River Bend Station 2015 Annual Radiological Effluent Release Report Page 19 of72

)

TABLE lA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 2.91E+Ol 4.67E+02 3 .16E+02 2.79E+Ol 8.40E+02

2. Avg. Release Rate uCi/sec 3.75E+OO 5.94E+Ol 3.97E+Ol 3.SlE+OO 2.66E+Ol

3. % Applicable Limit % (1) l.24E-01 5.94E+OO 2.64E+OO 3.lSE+OO 4.51E+OO Iodine-131

1. Total Release Ci 7.13E-04 8. 60E-05 4.57E-04 8.30E-04 2.09E-03

2. Avg. Release Rate uCi/sec 9.17E-05 1. 09E-05 5.75E-05 1. 04E-04 6.62E-05

3. % Applicable Limit % (2) 3.04E-01

3. 66E-02 l.97E-01 3.73E-01 4.56E-01 Particulates Half Life >= 8 days

1. Total Release Ci 5.06E-06 3.88E-05 5.29E-05 2.70E-05 l.24E-04

2. Avg. Release Rate uCi/sec 6.SlE-07 4.94E-06 6.66E-06 3.40E-06 3.93E-06

3. % Applicable Limit % (2) 2.32E-02 8.30E-03 7. 72E-03 l.78E-03 2.86E-02 Tritium

1. Total Release Ci 4.64E+OO 2.64E+OO 2.41E+OO 2.lSE+OO 1.18E+Ol

2. Avg. Release Rate uCi/sec 5.97E-01 3.36E-01 3.03E-01 2. 71E-01 3.76E-01

3. % Applicable Limit % (2) l.27E-01 5.39E-02 3.64E-02 2.97E-02 1.23E-01 1 1) Either the gamma air dose limit of 5 mrads/qtr or beta air dose limit of 10 mrads/qtr (T.R. 3.11.2.2.a), whichever is most limiting.

2) The % of applicable limit is determined by comparing the dose contribution to the critical organ limits of TRM 3.11.2.3.

River Bend Station 7015 Annual Radiological Effluent Release Report Page 20 of72 TABLE lB GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE REPORT FOR 2015 Units QTR 1 QTR 2 QTR.3 QTR 4 YEAR Fission and Activation Gases XE-133 Ci 2.38E-02 2.00E+OO 5.54E-01 O.OOE+OO 2.57E+OO XE-133M Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO XE-135 Ci l.61E-01 O.OOE+OO O.OOE+OO 9.92E-01 l.15E+OO XE-135M Ci 2.81E-01 O.OOE+OO O.OOE+OO l.09E+OO l.38E+OO Totals for Period ... Ci 4.65E-01 2.00E+OO 5.54E-01 2.09E+OO 5.lOE+OO Iodines I-131 Ci l. llE-06 O.OOE+OO 2.99E-06 2.03E-05 2.44E-05 I-133 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Totals for Period ... Ci l. llE-06 O.OOE+OO 2.99E-06 2.03E-05 2.44E-05 Particulates Half Life >= 8 days CE-141 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO C0-57 Ci O.OOE+OO O.OOE+OO O.OOE+OO . 0. OOE+OO O.OOE+OO C0-58 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO C0-60 Ci 5.56E-07 4.18E-06 O.OOE+OO O.OOE+OO 4.73E-06 CR-51 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO CS-137 Ci O.OOE+OO Q.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO FE-59 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO MN-54 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO NB-95 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO NI-63 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO RU-103 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO RU-106 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO SR-89 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO ZN-65 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

'(:'otals for Period ... Ci 5.56E-07 4.18E-06 O.OOE+OO O.OOE+OO 4.73E-06 Tritium H-3 Ci l.67E+OO 6.51E-01 3.86E-01 2.99E-01

3.0lE+OO

River Bend Station 2015 Annual Radiological Effluent Release Report Page 21 of72 TABLE lC GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases .

XE-133 Ci O.OOE+OO O.OOE+OO O.OOE+OO 0. OOE+,00 O.OOE+OO XE-135 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO XE-135M Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Totals for Period ... Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Iodines I-131 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO I-133 Ci O.OOE+OO b. OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Totals for Period ... Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Particulates Half Life >= 8 days BA-140 Ci O.OOE+OO O.OOE+OO 0. o*oE+OO O.OOE+OO O.OOE+OO C0-60 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO MN-54 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO SR-89 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO SR-90 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO ZN-65 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Totals for Period ... Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Tritium H-3 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

River Bend Station 2015 Annual Radiological Effluent Release Report Page 22 of72 TABLE lD GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE REPORT FOR 2015 Un.tts Q'I'R 1 QTR 2 QTR 3 QTR 4 YEAR-Fission and Activation Gases AR-41 Ci 3.56E-01 1.97E+Ol 5.64E-01 O.OOE+OO 2.06E+Ol KR-85 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO KR-85M Ci 6.25E-01 7.06E+Ol 6.53E+Ol 2.27E+OO 1. 39E+02 KR-87 Ci 3.75E-01 3.76E+Ol 5.82E+OO 1. 35E+OO 4.52E+Ol KR-88 Ci 4.91E-01 1.43E+02 7.04E+Ol 1.42E+OO 2.16E+02 XE-131M Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO XE-133 Ci 1. 66E+Ol 1.55E+02 1.72E+02 2.18E+OO 3.45E+02 XE-133M Ci O.OOE+OO 9.96E-01 6.SOE-01 O.OOE+OO 1. 65E+OO XE-135 Ci 7.80E+OO 3.32E+Ol 8.14E-01 1. 30E+Ol 5.48E+Ol XE-135M Ci 2.48E+OO 4.29E+OO O.OOE+OO 5.24E+OO 1.20E+Ol XE-137 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO XE-138 Ci O.OOE+OO 8.79E-01 O.OOE+OO 3.12E-01 1.19E+OO Totals for Period ... Ci 2.87E+Ol 4.65E+02 3.15E+02 2.58E+Ol 8.35E+02 Iodines I-131 Ci 7.12E-04 8.60E-05 4.54E-04 8.lOE-04 2.06E-03 I-132 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO I-133 Ci 1.92E-03 1. 09E-04 3.47E-04 1.52E-03 3.89E-03 I-135 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Totals for Period ... Ci 2.63E-03 1.95E-04 8.02E-04 2.32E-03 5.95E-03 Particulates Half Life >= 8 days BA-140 Ci O.OOE+OO O.OOE+OO 3.97E-06 O.OOE+OO 3.97E-06 CE-139 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO CE-141 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO C0-58 Ci O.OOE+OO 3.45E-06 5.08E-06 O.OOE+OO 8.53E-06 C0-60 Ci 4.SlE-06 3.12E-05 2.28E-05 1. 67E-06 6.02E-05 CR-Sl Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO CS-134 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO CS-137 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO FE-59 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO MN-54 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO RU-103 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO SR-89 Ci O.OOE+OO O.OOE+OO 2.lOE-05 2.53E-05 4.63E-05 SR-90 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO ZN-65 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Totals for Period ... Ci 4.SlE-06 3.47E-05 5.29E-05 2.70E-05 1.19E-04 Tritium H-3 Ci 2.97E+OO 1. 99E+OO 2.02E+OO 1. 85E+OO 8.84E+OO Carbon-14 C-14. Ci 2.73E+OO 2.73E+OO 2.77E+OO 2.77E+OO 1. lOE+Ol

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 23 of72 TABLE lE SUPPLEMENTAL INFO:RMATION GASEOUS EFFLUENTS - BATCH MODE REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 0 0 0 0 Total release time minutes O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Maximum release time minutes O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Average release time minutes O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Minimum release time minutes O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO

River Bend Station 2015 Annual Radiological Effluent Release Report Page 24 of72

'TABLE lF RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM Gaseous Release Sampling Minimum Type of Activity Lower Limit Type Frequency Analysis Analysis of Detection Frequency (LLD) uCi/ml A. Main Plant M M Principal Gamma Exhaust Duct Grab Sample Emitters l.OOE-04 I

H-3 1. OOE-06 B. Fuel Building M M Principal Gamma Ventilation Grab Sample Emitters ' l.OOE-04 Exhaust Duct H-3 l.OOE-06

c. Radwaste M M Principal Gamma Building Grab Sample Emitters l.OOE-04 Ventilation Exhaust Duct D. All Release Continuous w I-131 l.OOE-12 Types as listed Charcoal in A, B, & c I Sample above I-133 l.OOE-10 Continuous w Principal Gamma Particulate Emitters (I-131, 1. OOE-11 Sample Others)

' Continuous M Gross Alpha

' Composite 1. OOE-11 Particulate Sample Continuous Q Sr-89, Sr-90 Composite 1. OOE-11 Particulate Sample Continuous Noble Gas Noble Gases Monitor Gross Beta or 1. OOE-06 Gamma W At least once per 7 days M At least once per 31 days Q At least once per 92 days

River Bend Station 2015 Annual Radiological Effluent Release Report Page 25 of72 TABLE lG 2015 GASEOUS ANNUAL DOSE

SUMMARY

REPORT I&P DOSE LIMIT ANALYSIS =================================================

Age Dose Limit Max % of Period-Limit Group Organ (mrem) (mrem) Limit Ql - T.Spec Any Organ CHILD THYROID 3.41E-02 7.50E+OO 4.55E-01 Q2 - T.Spec Any Organ CHILD THYROID 7.41E-03 7.50E+OO 9.88E-02 Q3 - T.Spec Any Organ CHILD THYROID 1.81E-02 7.50E+OO 2.42E-01 Q4 - T.Spec Any Organ CHILD THYROID 3.15E-02 7.50E+OO 4.21E-01 Yr - T.Spec Any Organ CHILD THYROID 9.12E-02 1.50E+Ol 6.08E-01 Carbon-14 (Bounding calculation)==============================================

Ql - T.Spec Any Organ CHILD BONE 1.17E+OO 7.50E+OO 1. 56E+Ol Q2 - T.Spec Any Organ CHILD BONE 1.17E+OO 7.50E+OO 1.56E+Ol Q3 - T.Spec Any Organ CHILD BONE 1.18E+OO 7.50E+OO 1.58E+Ol ~

Q4 - T.Spec Any Organ CHILD BONE 1.18E+OO 7.50E+OO 1.58E+Ol Yr - T.Spec Any Organ CHILD BONE 4.70E+OO 1.50E+Ol 3.13E+Ol NG DOSE LIMIT ANALYSIS ===================================================

Dose Limit % of Period-Limit (mrad) (mrad) Limit Ql - T.Spec Gamma 6.19E-03 5.00E+OO 1.24E-01 Ql - T.Spec Beta 5.67E-03 1.00E+Ol 5.67E-02 Q2 - T.Spec Gamma 2.97E-01 5.00E+OO 5.94E+OO Q2 - T.Spec Beta l.35E-01 1.00E+Ol 1.35E+OO Q3 - T.Spec Gamma 1.32E-01 5.00E+OO 2.64E+OO Q3 - T.Spec Beta 6.16E-02 1.00E+Ol 6.16.E-01 Q4 - T.Spec Gamma i . 57.E-02 5.00E+OO 3.15E-01 Q4 - T.Spec Beta 1.09E-02 1.00E+Ql 1.09E-01 Yr - T.Spec Gamma 4.51E-01 1.00E+Ol 4.51E+OO Yr - T.Spec Beta 2.14E-01 2.00E+Ol 1.07E+OO

River Bend Station 2015 Annual Radiological Effluent Release Report Page 26 of72 TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Products

1. Total Release Ci 3.03E-04 8.62E-04 1. 27E-03 5.28E-04 2.96E-03

2. Avg. Diluted Cone. uCi/ml 3.37E-10 6.23E-10 8.98E-10 4.0lE-10 5.91E-10

3. % Applicable Limit % (1) l.04E-03 2.04E-03 3.67E-03 4.20E-04 7.05E-04 Tritium

1. Total Release Ci 8.89E+OO l.74E+Ol 2.39E+Ol l.42E+Ol 6.44E+Ol

2. Avg. Diluted Cone. uCi/ml 9.89E-06 1. 26E-05 l.69E-05 1. 08E-05 l.29E-05

3. % Applicable Limit % (1) l.50E-04 3.50E-04 7.62E-04 2.28E-04 7.05E-04 Dissolved and Entrained Gases

1. Total Release Ci 5.36E-05 4.19E-04 7.87E-04 2.28E-03 3.54E-03

2. Avg. Diluted Cone. µCi/ml 5. 97E-ll 3.03E-10 5.57E-10 1. 73E-09 7.06E-10

3. % Applicable Limit % (2) 2.99E-05 1. 52E-04 2.79E-04 8.70E-04 3.54E-04 Gross Alpha Radioactivity

1. Total Release Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Volume of liquid waste liters l.30E+06 2.34E+06 3.74E+06 l.73E+06 9.12E+06 Volume of dil. water liters 8.97E+08 l.38E+09 l.41E+09 l.31E+09 5.00E+09

( 1) The most limiting dose compared to the total body and critical organ limits of TRM 3.11.1.2.a.

(2) Technical Requirement 3.11.1.1 limit of 2.00E-04 uCi/ml for dissolved and entrained noble gases in liquid effluent.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 27 of72 TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE REPORT FOR 2015I Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Products

- No Nuclide Activities ** . . . . . . . . . ....... . ....... ........ . ......

Tritium

- No Nuclide Activities **

Dissolved and Entrained Gases

- No Nuclide Activities **

Gross Alpha Radioactivity

- No Nuclide Activities **

River Bend Station 2015 Annual Radiological Effluent Release Report Page 28 of72 TABLE 2C LIQUID EFFLUENTS - BATCH MODE REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases C0-58 Ci 1.06E-06 l.98E-06 4.46E-06 2.91E-06 1. 04E-05 C0-60 Ci 2.16E-04 7.13E-04 1.09E-03 4.87E-04 2.SOE-03 CR-51 Ci 6.57E-06 O.OOE+OO S.86E-06 O.OOE+OO 1. 24E-05 CS-134 Ci O.OOE+OO 3.03E-06 O.OOE+OO O.OOE+OO 3.03E-06 CS-137 Ci O.OOE+OO 2.75E-06 O.OOE+OO O.OOE+OO 2.75E-06 I-131 Ci O.OOE+OO O.OOE+OO O.OOE+OO 1. 7 6E-06 1. 76E-06 MN-54 Ci 7.54E-05 1.14E-04 1. 27E-04 2.56E-05 3.42E-04 ZN-65 Ci 3.21E-06 2.73E-05 4.33E-05 1. llE-05 8.49E-05 Totals for Period ... Ci 3.03E-04 8.62E-04 1.27E-03 5.28E-04 2.96E-03 Tritium H-3 Ci 8.89E+OO 1.74E+Ol 2.39E+Ol 1.42E+Ol 6.44E+Ol Totals for Period ... Ci 8.89E+OO l.74E+Ol 2.39E+Ol . 1.42E+Ol 6.44E+Ol Dissolved and Entrained Gases XE-133 Ci 3.49E-05 2.SOE-04 4.53E-04 1.19E-03 1.93E-03 XE-133M Ci O.OOE+OO O.OOE+OO O.OOE+OO 2.09E-05 2.09E-05 XE-135 Ci 1. 87E-05 1.67E-04 3.33E-04 1. 07E-03 1. 59E-03 XE-135M Ci O.OOE+OO 2.40E-06 O.OOE+OO O.OOE+OO 2.40E-06 Totals for Period ... Ci 5.36E-05 4.19E-04 7.87E-04 2.28E-03 3.54E-03 Gross Alpha Radioactivity

- No Nuclide Activities **

Totals for Period ... Ci 4.82E-04 7.88E-05 1.71E-03 5.56E-04 2.82E-03 Gross Alpha Radioactivity

- No Nuclide Activities **

River Bend Station 2015 Annual Radiological Effluent Release Report Page 29 of72 TABLE2D EFFLUENT AND WASTE DISPOSAL REPORT SUPPLEMENTAL INFORMATION LIQUID EFFLUENTS - BA'I:CH MODE REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 26 45 69 33 173 Total release time minutes 6.61E+03 1.23E+04 1.97E+04 9.12E+03 4.77E+04 Maximum release time minutes 3.92E+02 4.60E+02 3.38E+02 4.37E+02 4.60E+02 Average release time minutes 2.54E+02 2.74E+02 2.85E+02 2.76E+02 2.76E+02 Minimum release time minutes 7.70E+Ol 3.60E+Ol 2.80E+Ol 2.80E+Ol 2.80E+Ol QTR 1 QTR 2 QTR 3 QTR 4 Average Mississippi 3 River stream flow ft /sec 521,844 835,791 649,685 450, 989 during periods of release of effluent into a flowing stream.

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 30 of72 TABLE2E RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM Liquid Release Type Sampling Frequency Minimum Analysis Type of Activity Lower Limit of Frequency Analysis Detection (LLD) uCi/ml A. Batch Waste p p Principal Gamma 5.00E-07 Release (Liquid Each Batch Each Batch Emitters: excegt Radwaste for Ce-144 5.00E-06 Recovery Sample Tanks)

I-131 l.OOE-06 p M Dissolved and Entrained One Batch/M Gases (Gamma l.OOE-05 Emitters) p M H-3 l.OOE-05 Each Batch Composite

Gross Alpha l.OOE-07 p Q Sr-89, Sr-90 5.00E-08 Each Batch Composite Fe-55 l.OOE~06 P = Prior to each radioactive release M = At least once per 31 days Q = At least once per 92 days

River Bend Station 2015 Annual Radiological Effluent Release Report Page 31 of72 TABLE2F LIQUID ANNUAL DOSE

SUMMARY

REPORT R.eport for: 2015 Release ID: 10 All Liquid Release Points Liquid Receptor SITE DOSE LIMIT ANALYSIS ===================================================

Age Dose Limit Max % of Period - Limit Group Organ. (mrem) (mrem) Limit Qtr 1 - T.Spec Any Organ ADULT GILLI 5.41E-05 5.00E+OO l.08E-03 Qtr 1 - T,Spec Total Body ADULT TBODY 5.77E-06 l.50E+OO 3.84E-04 Qtr 2 - T.Spec Any Organ ADULT GILLI l.07E-04 5.00E+OO 2.14E-03 Qtr 2 - T.Spec Total Body ADULT TBODY 1. 73E-05 l.50E+OO l.16E-03 Qtr 3 - T.Spec Any Organ ADULT GILLI l.95E-04 5.00E+OO 3.gOE-03 Qtr 3 - T.Spec* Total Body ADULT TBODY 2.88E-05 l.50E+OO l.92E-03 Qtr 4 - T.Spec Any Organ ADULT GILLI 2.44E-05 5.00E+OO 4.88E-04 Qtr 4 - T.Spec Total Body ADULT TBODY 5.58E-06 l.50E+OO 3.72E-04 2015 - T.Spec Any Organ ADULT GILLI 3.52E-04 1. OOE+Ol 3.52E-03 20~5 - T.Spec Total Body ADULT TBODY 5.34E-05 3.00E+OO 1. 78E-03

River Bend Station 2015 Annual Radiological Effluent Release Report Page 32 of72 TABLE 3 Effluent and Waste Disposal Annual Report 2015 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/15 to 12/31/15 A. Solid Waste Shipped for Burial or Disposal (Not Irradiated Fuel)

1. Type of Waste Units 12 Month Period Waste Class Estimated Error %

Spent Resins, Filter m3 5.56E+Ol A +/- 25%

Sludges, Evaporator. Ci 4.87E+Ol A Bottoms, Etc. m3 O.OOE+OO B Ci O.OOE+OO B m3 O.OOE+OO c Ci O.OOE+OO c Dry Compressible Wastes, m3 8.69E+02 A +/- 25%

Contaminated Equipment Ci l.48E+OO A Etc.

Irradiated Components, m3 O.OOE+OO Control Rods, Etc. Ci O.OOE+OO Other m3 1. 46E+02 A +/- 25%

(Water, EHC, Waste Oil, Ci l.67E+02_ A etc.)

Note: Volume considered being the total disposal volume of the container.

Radwaste Estimated Error %:

Waste types considered are processed solid waste (i.e. resin, filter media) and non-compactible/compactible dry active waste.

1. Possible Errors

a. Volume

b. Represehtati ve Sampling

c. Instrument/Counting

d. Dose to Curie Calculations

2. Volume Error Level indication for processed resins can be determined to +/- 0.5 inches. This correlates to approximately 1.0%. Container manufacturer stated design tolerance allows for 1.0% deviation from container dimensions. Volume error is not applicable to dry active waste.

3. Representative Sampling Error Sampling error for processed resins is based upon obtaining a representative sample -from the waste being processed using an iso-lock sampler. Sampling error from dry active waste is based upon obtaining a representative sample from the material being packaged. This error is estimated to be +/- 10% for all waste types, which is consistent with industry standards.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 33 of72 Effluent and Waste Disposal Annual Report 2015 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/15 to 12/31/15 Table 3 (continued)

4. Instrument/Counting Error The error caused by sample geometry, counting time, sample activity and instrument background is estimated to be +/- 10%. The error for radiological survey instrumentation is estimated to be +/- 20%. This error is applicable to all waste types.

5. Dose to Curie Calculations Error The Dose to Curie method used to calculate activity suffers from analytical accuracy in that certain important parameters are neglected. These parameters are geometry of package, measuring instrument characteristics, build-up, internal attenuation effect, and external media attenuation. An activity correction factor is applied to provide adju*stment for these factors. This error is applicable to all waste types.

2. Estimates of Major Nuclides by Waste Stream Resins, Filters, Evaporator Dry Compressible Wastes,* Other Bottoms, Etc. Contaminated Equipment, Etc. Water, EHC, Waste Oil' Etc.

(Min .1%) (Min 1%) (Min 1%)

Isotope % Abundance Curies I~otope % Abundance Curies Isotope % Abundance Curies H-3 1.27 6.23E-01 CR-51 1. 74 2.59E-02 H-3 99.97 1.67E+02 MN-54 4.31 2.2E+OO MN-54 4.30 6.40E-02 FE-55 36. 41 1. 79E+Ol FE-55 25.48 3.80E-01 C0-60 52.27 2.57E+Ol C0-58 2.51 3.74E-02 ZN-65 2.81 1.38E+OO C0-60 49.60 7.39E-Ol ZN-65 2.10 3.13E-02 ZR-95 4.21 6.27E-02 NB-95 6.62 9.86E-02 Determined by Measurement & Correlation.

Packaged in Strong, Tight Liners.

No Solidification Agent or Absorbent Used.

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 1 Truck Energy Solutions (Clive) - Clive Utah 40 Truck Energy Solutions (Bear Creek) - Oak Ridge, TN B. Irradiated Fuel Shipments Disposition No Irradiated Components, Control Rods, Etc. were shipped in 2015 Number of Shipments Mode of Transportation Destination 0 N/A N/A

)liver Bend Station 2015 Annual Radiological Eftluent Release Report Page 34 of72 TABLE4 MEMBERS OF THE PUBLIC ON SITE DOSE ASSUMPTIONS/PARAMETERS MEMBER OF LOCATION DIST ANCE< 1l SECTOR DURATION THE PUBLIC METERS (HRJYEARpi People Entering Site Without Alligator Bayou 2500 SW 40 Consent National Guard. Activity Center 994 WNW 0(3)'

Workers staying Activity Center 994 I WNW 1104<4) onsite Trailer City Deer Hunters Activity Center 994 WNW 256(5)

( 1) The approximate distances from main plant vent exhaust to location.

(2) Liquid dose pathway is not considered due t0 the nature of activities that individuals are engaged in.

(3) National Guard/State Police are being evaluated, if applicable, for dose while stationed on site as members of the public. The adult age group is the only age group considered in this category. No National Guard in 2015.

(4) Workers have been permitted to stay long term at the Activity Center Trailer City beginning April 10, 2007. Effective August 15, 2014, site management closed the Activity Center Trailer City and all trailers were removed. Going forward, trailers will be allowed 30 days prior to and must be removed 14 days following refueling outages. For 20.15, this conservative estimate is based on 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months per day, 4 days per week for 23 weeks, totaling 1104 hours0.0128 days 0.307 hours 0.00183 weeks 4.20072e-4 months . The adult age group is the only age group considered for this activity.

(5) Employees are allowed to deer hunt on company property. Since the hunters are spread out all over the site, those workers are conservatively evaluated at the /

activity center using occupancy information provided by the Bow Club. In 2015, hunter's dose is not greater than Trailer City.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 35 of72 MEMBERS OF THE PUBLIC ON SITE DOSE FROM GASEOUS RELEASES 2015 Location Critical Organ Total Body Dose Skin Dose Annual Dose Annual Annual {mrem)

Annual {mrem) Duration (mrem) Factor Alligator 2.90E-05 2.75E-04 4.14E-04 4.57E-03 Bayou ~

Workers staying l.39E-03 5.46E-02 8.22E-02 l.26E-Ol onsite Deer 3.21E-04 1.27E-02 l.91E-02 2.92E-02 Hunters

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 36 of72 TABLES 2015 YEAR METEOROLOGICAL DATA - JOINT FREQUENCY TABLES

River Bend Station 2015 Annual Radiological Effluent Release Report Page 37 of72 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 87 51 66 151 124 217 . 72 1 0 0 0 0 769 NNE 82 38 72 160 119 159 20 0 0 0 0 0 650 NE 52 39 63 141 128 86 7 0 0 0 0 0 516 ENE 76 38 .42 106 77 60 9 0 0 0 0 0 408 E 58 57 50 72 56 19 0 0 0 0 0 0 312 ESE 30 59 ) 56 80 74 I 31 1 0 0 0 0 0 331 SE 16 58 105 207 . 228 236 29 0 0 O' 0 0 879 SSE 19 31 55 181 141 183 72 21 0 0 0 0 703 s 18 29 60 126 89 158 28 0 0 0 0 0 508 SSW 16 32 64 107 86 89 37 0 0 0 *o 0 431 SW 15 42 59 64 51 35 13 0 0 0 0 0 279 WSW 19 43 42 50 65 60 5 0 0 0 0 0 284 w 33 59 38 56 71 98 6 0 0 0 0 0 361 WNW 45 88 43 64 52 65 9 0 0 ' 0 0 0 366 NW 105 90 47 6i 52 68 25 0 0 0 0 0 448 NNW 112 85 53 96 78 107 66 0 0 0 0 0 597 TOTAL 783 839 915 1722 1491 1671 399 22 0 0 0 0 7842 NUMBER OF CALMS: 162 NUMBER OF INVALID HOURS: 756 NUMBER OF VALID HOURS: 7842 TOTAL HOURS FOR THE PERIOD: 8760

River Bend Station 2015 Annual Radiological Effluent Release Report Page 38 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (ME~RS/SECOND)

W:j:ND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 1 3 30 34 90 34 1 0 0 0 0 193 NNE 1 2 8 33 27 67 8 0 0 0 0 0 146 NE 3 2 8 20 47 48 0 0 0 0 0 0 128 ENE 1 0 8 30 27 24 1 0 0 0 0 0 91 E 0 1 7 21 20 r 10 0 0 0 0 0 0 59 ESE 1 3 5 20 26 12 1 0 0 0 0 0 68 SE 0 1 8 27 63 95 10 0 0 0 0 0 20~

SSE 0 0 2 18 40 85 34 0 0 0 0 0 179 s 0 3 2 15 32 96 17 0 0 0 0 0 165 SSW 1 1 5 24 40 45 14 0 0 0 0 0 130 SW 0 2 1 25 38 22 8 0 0 0 0 0 96 WSW 0 3 5 25 55 47 4 0 0 0 0 0 139 w 0 0 5 33 59 94 5 0 0 0 0 0 196 WNW 0 0 5 27 30 55 8 0 0 0 0 0 125 NW 0 0 3 22 31 33 7 0 0 0 0 0 96 NNW 0 0 4 16 31 41 44 0 0 0 0 0 136 TOTAL 7 19 79 386 600 864 195 1 0 0 0 0 2151 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2151 TOTAL HOURS FOR THE PERIOD: 2151

River Bend Station 2015 Annual Radiological Effluent Release Report Page 39 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1'- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 3 4 2 0 0 0 0 0 9 NNE 0 1 0 2 3 3 0 0 0 0 0 0 9 NE 0 0 0 1 1 1 0 0 0 0 0 0 3 ENE 0 1 0 3 0 0 0 0 0 0 0 0 4 E 0 1 1 2 1 0 0 0 0 . 0 0 0 5 ESE 1 0 0 2 0 0 0 0 0 0 0 0 3 SE 0 0 2 0 1 6 1 0 0 0 0 0 10 SSE 0 0 1 1 4 2 5 1 0 0 0 0 14 s 0 0 1 2 0 7 0 0 0 0 0 0 10 SSW 0 0 0 2 2 5 3 0 0 0 0 0 12 SW 0 0 0 0 1 1 2 0 0 0 0 0 4 WSW 0 0 1 3 1 2 0 0 0 0 0 0 7 w 0 0 2 3 1 1 0 0 0 0 0 0 7 WNW 0 0 0 1 0 1 0 0 0 0 *O .. 0 2 NW 0 0 1 1 1 2 1 0 0 0 0 0 6 NNW 0 0 0 0 0 3 0 0 0 0 0 0 3 TOTAL 1 3 9 23 19 38 ' 14 1 0 0 0 0 108 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 108 TOTAL HOURS FOR THE PERIOD: 108

River Bend Station 2015 Annual Radiological Effluent Release Report Page40 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 3 2 9 4 0 0 0 0 0 18 NNE 0 0 1 3 3 8 1 0 0 0 0 0 16 NE 0 0 0 5 2 5 0 0 0 0 0 0 12 ENE 0 0 1 1 4 1 0 0 0 0 0 0 7 E 1 0 2 1 2 1 0 0 0 0 0 0 7 ESE 0 2 2 3 4 1 0 0 0 0 0 0 12 SE 0 0 2 6 2 5 1 0 0 0 0 0 16 SSE 0 0 1 4 4 6 4 1 0 0 0 0 20 s 0 0 2 3 3 11 3 0 0 0 0 0 22 SSW 0 0 0 1 5 4 3 0 0 0 0 0 13 SW 0 0 0 2 0 3 0 0 0 0 0 0 5 WSW 0 0 0 2 1 3 0 0 0 0 0 0 6 w 0 0 1 1 4 1 0 0 0 0 0 0 7 WNW 0 0 1 0 1 1 0 0 0 0 0 0 3 NW 0 0 3 0 0 3 0 0 0 0 0 0 6 NNW 0 0 0 2 2 3 2 0 0 0 0 0 9 TOTAL 1 2 16 37 39 65 18 1 0 0 0 0 179 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 179 TOTAL HOURS FOR THE PERIOD: 179

River Bend Station 2015 Annual Radiological Effluent Release Report Page 41 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1.- 1.6- 2.1- 3.1- 5.1-*7.1-*'10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 3 2 6 22 39 72 22 0 0 0 0 0 166 NNE 1 0 6 28 36 40 3 0 0 0 0 0 114 NE o. 2' 3 17 18 6 0 0 0 0 0 0 46 ENE 1 2 2 7 8 3 0 0 0 0 0 0 23 E 0 4 8 7 3 3 0 0 0 0 0 0 25 ESE 0 2 4 13 l;L 2 0 0 0 0 0 0 32 SE 0 0 7 37 27 16 7 0 0 0 0 0 94 SSE 1 0 6 14 14 26 11 12 0 0 0 0 84 s 0 1 1 15 14 16 7 0 0 0 0 0 54 SSW 0 1 5 7 7 12 10 0 0 0 0 0 42 SW 0 4 4 8 4 5 2 0 0 0 0 0 27 WSW 2 0 7 7 3 6 1 0 0 0 0 0 26 w 0 4 4 7 2 2 1 0 0 0 0 0 20 WNW 0 2 4 10 11 3 1 0 0 0 0 0 31 NW 0 2 7 12 4 13 4 0 0 0 0 0 42 NNW 1 1 5 ' 17 16 35 . 12 0 0 0 0 0 87 TOTAL 9 27 79 228 217 260 81 12 0 0 0 0 913 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 913 TOTAL HOURS FOR THE PERIOD: 913

River Bend Station 2015 Annual Radiological EffiuentRelease Report Page'42 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY ~ENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1.;. 1.6- 2.1- 3.1- 5.1- 7.l- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 7 12 22 59 44 42 10 0 0 0 0 0 196 NNE 7 15 25 57 44 41 8 0 0 0 0 0 197 NE 7 8 27 49 49 25 7 0 0 0 0 0 172 ENE 7 9 19 34 29 25 8 0 0 0 0. 0 131 E 5 20 18 29 28 5 0 0 0 0 0 0 105 ESE 5 23 25 36 31 16 0 0 0 0 0 0 136 SE 7 27 52 124 131 114 10 0 0 0 0 0 465 SSE 4 14 20 93 74 63 18 7 0 0 0 0 293 s 6 9 23 43 37 27 1 0 0 0 0 b 146 SSW 4 13 30 56 26 22 7 0 0 0 0 0 158 SW 5 18 21 24 8 4 1 0 0 0 l 0 0 81 WSW 5 18 19 10 5 2 0 0 0 0 0 0 59 w 4 13 15 11 5 0 0 0 0 0 0 0 48 WNW 1 15 17 19 10 3 0 0 0 0 0 0 65 NW 7 8 15 24 16 17 13 0 0 0 0 0 100 NNW 9 11 15 36 27 25 8 0 0 0 0 0' 131 TOTAL 90 233 363 704 564 431 91 7 0 0 0 0 2483 NUMBER OF CALMS: 27 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2483 TOTAL HOURS FOR THE PERIOD: 2483

River Bend Station 2015 Annual Radiological Effluent Release Report* Page 43 of72 RIVER BEND STATION JOINT FREQUENCY' TABLE STABILITY CLASS F FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6~ 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 9 12. 11 26 2 0 0 0 0 0 0 0 60 NNE 19 11 21 33 5 0 0 0 0 0 0 0 89 NE 9 16 21 44 10 1 0 0 0 0 0 0 101 I

ENE 17 11 9 29 8 6 o. 0 0 0 0 0 80 E 21 15 10 11 1 0 0 0 0 0 0 0 58 ESE 13 24 15 6 2 0 0 0 0 0 0 0 60 SE 7 15' 26 9 4 0 0 0 0 0 ; 0 0 61 SSE 10 17 22 48 5 1 0 *o 0 0 0 0 103 s 8 14 23 46 3 1 0 0 0 0 0 0 95 SSW 7 14 23 17 6 1 0 0 0 0 0 0 68 SW 7 12 27 4 0 0 0 0 0 0 0 0 50 WSW 9 17 7 3 0 0 0 0 0 0 0 0 36 w 9 19 6 1 0 0 0 0 0 0 b 0 35 WNW 16 30 12 6 0 2 0 0 0 0 0 0 66 NW 20 22 11 1 0 0 0 0 0 0 0 0 54 NNW 17 19 12 21 2 0 0 0 0 0 0 0 71 TOTAL 198 268 256 305 48 12 0 0 0 0 0 0 1087 NUMBER OF CALMS: 35 NUMBER OF INVALID HOURS: 0 J

NUMBER OF VALID HOURS: 1087 TOTAL HOURS FOR THE PERIOD: 1087

River Bend Station 2015 Annual Radiological Effluent Release Report Page 44 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18* TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 68 24 24 11 0 0 0 0 0 0 0 0 127 NNE 54 9 11 4 1 0 0 0 0 0 0 0 79 NE 33 11 4 5 1 0 0 0 0 0 0 0 54 ENE 50 15 3 2 1 1 0 0 0 0 0 0 72 E 31 16 4 1 1 0 0 0 0 0 0 0 53 ESE 10 5 5 0 0 0 0 0 0 0 0 0 20 SE 2 15 8 4 0 0 0 0 0 0 0 0 29 SSE 4 0 3 3 0 0 0 0 0 0 0 0 10 s 4 2 8 2 0 0 0 0 0 0 0 0 16 SSW 4 3 1 0 0 0 0 0 0 0 0 0 8 SW 3 6 6 1 0 0 0 0 0 0 0 0 16 WSW 3 5 3 0 0 0 0 0 0 0 0 0 11 w 20 23 5 0 0 0 '0 0 0 0 0 0 48 WNW 28 41 4 1 0 0 0 0 0 0 0 0 74 NW 78* 58 7 1 0 0 0 0 0 0 0 0 144 NNW 85 54 17 4 0 0 0 0 0 0 0 0 160 TOTAL 477 287 113 39 4 1 0 0 0 0 0 0 921 NUMBER OF CALMS: 95 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 921 TOTAL HOURS FOR THE PERIOD: 921

River Bend Station 2015 Annual Radiological EffiuentRelease Report Page 45 of72 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (MET~RS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 2 1 12 43 56 206 284 27 2 0 0 0 633 NNE 0 5 6 37 68 252 279 13 0 0 0 0 660 NE 2 4 9 18 55 146 329 31 6 0 0 0 600 ENE 1 3 6 36 65 125 188 61 7 0 0 0 492 E 2 2 14 35 54 110 101 36 4 0 0 0 358 ESE 1 2 4 24 42 172 509 158 7 0 0 0 919 SE 0 1 11 28 38 159 299 62 5 0 0 0 603 SSE 1 4 7 23 53 166 191 49 23 0 0 0 517 s 3 3 8 29 70 199 231 10 3 0 0 0 556 SSW 0 3 9 34 67 200 1ss* 30 1 0 0 0 507 SW 2 2 8 25 69 185 78 7 1 0 0 0 377 WSW 0 1 6 26 75 240 61 5 0 0 0 0 414 w 0 1 6 23 63 237 109 1 0 0 0 0 440 WNW 1 5 5 31 47 117 so 7 0 0 0 0 263 NW 0 4 5 20 33 87 77 20 0 0 0 0 246

,NNW 1 2 8 26 42 112 188 29 1 0 0 0 409 TOTAL 16 43 124 458 897 2721 3129 546 60 0 0 0 7994 NUMBER OF CALMS: 4 NUMBER OF INVALID HOURS: 762 NUMBER OF VALID HOURS: 7994 TOTAL HOURS FOR THE PERIOD: 8760

River Bend Station 2015 Annual Radiological Effluent Release Report Page 46 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 0 2 15 15 37 83 9 1 0 0 0 163 NNE 0 2 0 12 24 45 54 3 0 0 0 0 140 NE 0 1 0 5 26 44 66 5 0 0 0 0 147 ENE 0 0 0 7 21 40 46 12 1 0 0 0 127 E 0 0 4 6 15 31 24 6 1 0 0 0 87 ESE 0 0 0 7 14 36 93 32 2 0 0 0 184 SE 0 0 2 6 10 27 70 20 0 0 0 0 135 SSE 0 1 0 4 14 35 62 23 1 0 0 0 140 s 0 0 3 7 9 48 75 5 0 0 0 0 147 SSW 0 0 1 8 22 45 38 9 0 0 0 0 123 SW 0 0 3 9 25 39 18 3 0 0 0 0 97 WSW 0 0 0 11 28 76 35 3 0 0 0 0 153 w 0 0 0 6 32 107 78 1 0 0 0 0 224 WNW 0 1 1 10 20 42 18 1 0 0 0 0 93 NW 0 1 1 6 11 26 24 3 0 0 0 0 72 NNW 0 1 0 7 14 27 52 18 0 0 0 0 119 TOTAL 1 7 17 126 300 705 836 153 6 0 0 0 2151 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2151 TOTAL HOURS FOR THE PERIOD: 2151

River Bend Station 2015 Annual Radiological Effluent Release Report Page 47 of72 RIVER BEND STATION JOINT FREQUENCY ~ABLE STABILITY CLASS B FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .so .75 1.0 1.5 2.0 3.0 5.0 *1.0 io.o 13.0 18.0 N 0 0 0 1 0 7 3 1 0 0 0 0 12 NNE 0 0 0 2 0 2 3 0 0 0 0 0 7

\"

NE 0 o* 0 0 0 1 3 o' 0 0 0 0 4 ENE 0 0 1 0 1 2 2 0 0 0 0 0 6 E 0 0 1 0 2 0 2 0 0 0 0 0 5 ESE 0 0 1 0 0 0 2 4 0 0 0 0 7 SE 0 0 1 2 1 1 0 3 0 0 0 0 8 SSE 0 0 1 0 0 1 4 4 1 0 0 0 11 s 0 0 0 0 2 2 9 0 0 0 0 0 13 SSW 0 0 0 1 0 1 3 2 0 0 0 0 7 SW 0 0 0 0 0 1 3 2 0 0 0 0 6 WSW 0 0 0 1 3 1 2 0 0 0 0 0 7

.w 0 0 0 1 2 3 1 0 0 0 0 0 7 WNW 0 0 0 0 1 2 0 1 0 0 0 0 4 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 0 0 0 3 0 0 0 0 0 3 TOTAL 0 0 5 8 12 24 41 17 1 0 0 0 108 NUMBER OF CALMS: O' NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 108 TOTAL HOURS FOR THE PERIOD: 108

River Bend Station 2015 Annual Radiological Effluent Release Report Page 48 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 2 9 2 0 0 0 0 13 NNE 0 0 1 1 2 7 8 1 0 0 0 0 20 NE 0 0 0 1 1 5 7 0 0 0 0 0 14 ENE 0 0 0 0 1 3 4 1 0 0 0 0 9 E 0 0 0 1 1 1 4 0 0 0 0 0 7 ESE 1 0 0 1 0 5 9 3 0 0 0 0 19 SE 0 0 0 0 2 2 4 2 0 0 0 0 10 SSE 0 0 1 1 2 2 7 1 3 0 0 0 17 s 0 1 0 0 0 7 8 1 1 0 0 0 18 SSW 0 0 0 0 0 3 6 3 0 0 0 0 12 SW 0 0 0 0 1 2 5 0 0 0 0 0 8 WSW 0 0 o* 0 3 0 3 0 0 0 0 0 6 w 0 0 0 0 1 2 3 0 0 0 0 0 6 WNW 0 0 0 2 2 1 1 0 0 0 0 0 6 NW 0 0 0 0 0 1 4 0 0 0 0 0 5

. NNW 0 0 0 1 1 1 5 1 0 0 0 0 9 TOTAL 1 1 2 8 17 44 87 15 4 0 0 0 179 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 179 TOTAL HOURS FOR THE PERIOD: 179

River Bend Station 2015 Annual Radiological Effiuent Release Report Page 49 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 1 1 6 13 43 79 8 1 0 0 0 153 NNE 0 0 0 4 12 57 53 2 0 0 0 0 128 NE 0 1 2 2 3 15 22 1 0 0 0 0 46 ENE 0 1 1 4 5 8 15 3 0 0 0 0 37 E 0 0 2 4 1 6 13 3 0 0 0 0/ 29 ESE 0 1 0 2 3 16 38 11 0 0 0 0 71 SE 0 0 0 2 3 17 29 10 3 0 0 .0 64 SSE 1 0 1 2 8 15 22 6 12 0 0 0 67 s 0 0 0 1 5 20 22 3 2 0 0 ~ 53 SSW 0 0 1 1 5 8 17 7 1 0 0 0 40 SW 0 1 0 0 5 12 7 2 0 0 0 0 27 WSW 0 0 2 2 4 9 7 2 0 0 0 0 26 w 0 1 1 3 5 18 8 0 0 0 0 0 36 WNW 0 0 1 1 4 9 3 2 0 0 0 0 20 NW 0 1 0 4 7 7 14 4 0 0 0 0 37 NNW 0 0 2 3 6 20 44 5 1 0 0 0 81 TOTAL 2 7 14 41 89 280 393 69 20 0 0 0 915 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 915 TOTAL HOURS FOR THE PERIOD: 915

River Bend Station 2015 Annual Radiological Effluent Release Report Page 50 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76~ 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.l- >18 TOT.

DIR . 50 . 75 1. 0 1. 5 2. 0 3. 0 5. 0 7. 0 10. 0 13. 0

18. 0 N 0 0 3 12 15 71 62 7 0 0 0 0 170 NNE 0 0 3 8 13 71 94 7 0 o. 0 0 196 NE 0 1 4 2. 13 43 111 16 6 0 0 0 196 ENE 0 0 0 12 9 39 81 31 6 0 0 0 178 E 0 0 4 12 10 25 36 23 3 0 0 0 113 ESE 0 0 2 5 12 68 249 102 5 0 0 0 443 SE 0 0 2 5 11 65 137 27 2 0 0 0 249 SSE 0 0 1 7 9 45 75 15 6 0 0 0 158 s 1 0 3 5 19 43 80 1 0 0 0 0 152 SSW 0 0 3 7 15 69 61 9 0 0 0 0 164 SW 0 1 0 6 19 55 24 0 1 0 0 0 106 WSW 0 0 1 4 11 55 10 0 0 0 0 0 81 w 0 0 1 5 6 33 10 0 0 0 0 0 55 WNW 1 1 1 6 8 11 16 3 0 0 0 0 47 NW 0 2 2 .7 6 20 27 13 0 0 0 0 77 NNW 0 1 3 6 ' 14 33 56 ) 5 0 0 0 0 118 TOTAL 2 6 33 109 190 746 1129 259 29 0 0 0 2503 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2503 TOTAL HOURS FOR THE PERIOD: 2503

River Bend Station 2015 Annual Radiological Effluent Release Report Page 51 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 1/01/15 0:00 TO 12/31/15 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 1 5 6 18 22 0 0 0 0 0 52 NNE 0 0 0 4 4 38 38 0 0 0 0 0 84 1

NE 0 0 0 3 6 15 80 7 0 0 0 0 111 ENE 0 1 2 6 15 23 23 10 0 0 0 0 80 E 2 1 1 7 13 27 20 2 0 0 0 0 73 ESE 0 0 1 6 9 29 97 3 0 0 0 0 145 SE 0 0 1 4 .6 31 45 0 0 0 0 0 87 SSE 0 1 0 4 11 34 16 0 0 0 0 0 66 s 1 0 0. 5 14 49 28 0 0 0 0 0 97 SSW 0 0 0 3 11 48 23 0 0 0 0 0 85 SW 0 0 3 3 4 35 15 0 0 0 0 0 . 60 WSW 0 1 0 1 12 43 0 0 0 0 0 0 57 w 0 0 1 ( 1 7 18 4 0 0 0 0 0 31 WNW 0 1 0 8 3 22 6 0 0 0 0 0 40 NW 0 0 1 0 1 17 5 0 0 0 0 0 24 NNW 0 0 0 2 3 10 14 0 0 0 0 0 29 TOTAL 3 5 11 62 125 457 436 22 0 0 0 0 1121 NUMBER pF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: *1121 TOTAL HOURS FOR THE PERIOD: 1121

River Bend Station 2015 Annual Radiological Effluent Release Report Page 52 of72 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 1/01/lS 0:00 TO l2/31/1S 23:00 PRIMARY SENSORS - lSO FOOT WIND SPEED (METERS/SECOND)

WIND .22- .Sl- .76- 1.1- 1.6- 2.1- 3.1- S.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .so .7S '1.0 l.S 2.0 3.0 s.o 7.0 10.0 13.0 18.0 N 0 0 s 4 7 28 26 0 0 0 0 0 70 NNE 0 3 2 6 13 32 29 0 0 0 0 0 8S NE 2 1 3 s 6 23 40 2 0 0 0 0 82 ENE 1 1 2 7 13 10 17 4 0 0 0 0 SS E 0 1 2 s 12 20 2 2 0 0 0 0 44 ESE 0 1 0 3 4 18 21 3 0 0 0 0 so SE 0 1 s 9 s 16 14 0 0 0 0 0 so SSE 0 2 3 s 9 34 s 0 0 0 0 0 S8 s 1 2 2 11 21 30 9 0 0 0 0 0 76 SSW 0 3 4 14 14 34 7 0 0 0 0 0 76 SW 2 0 2 7 lS 41 6 0 0 0 0 0 73 WSW 0 0 3 7 14 S6 4 0 0 0 0 0 84 w 0 0 3 7 10 S6 s 0 0 0 0 0 81 WNW 0 2 2 4 9 30 6 0 0 0 0 0 S3 NW 0 0 1 3 8 16 2 0 0 0 0 0 30 NNW 1 0 3 7 4 21 14 0 0 0 0 0 so TOTAL 7 17 42 104 164 46S 207 11 0 0 0 0 1017 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1017 TOTAL HOURS FOR THE PERIOD: 1017

River Bend Station 2015 Annual Radiological Effluent Release Report Page 53 of72

\f TABLE6 ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DOSE CALCULATIONS Analysis Location Ground Level Mixed Mode (meters) Releases Releases Gamma air dose 994mWNW CHI/Q - 421.0 CHl/Q - 33.1 (3) and* Beta Air (Containment)

Dose Maximum 994mWNW CHI/Q - 421.0 CHl/Q - 33.1 Receptor (4)

Resident D/Q - 50.3 D/Q - 18.0 Garden Meat animal Immersion Milk animal ( 5) 7,000mWNW CHl/Q - 3.58 CHl/Q - .870 D/Q - 0.38 D/Q - .223 Other* on-site 115 mENE CHl/Q - 5977.0 CHl/Q - 407.5 Receptors D/Q - 529.7 D/Q - 46.9 275 mN* CHl/Q - 1644.0 CHl/Q - 169.1 DIQ - 345.6 DIQ - 68.4 2500 SW CHI/Q - 34.45 CHl/Q - 4.65 DIQ - 3.35 D/Q - 1.40 Notes:

(1) All CHl/Q = 10-7 sec/m3

\

(2) All D/Q = 10-9 m-2 (3) Maximum offsite location (property boundary) with highest CHl/Q (unoccupied).

(4) Maximum hypothetical occupied offsite location with highest CHl/Q and D/Q.

(5) No milk animal within 5 miles radius, .hypothetical location in worst sector.

(6) Other onsite receptors (7) Revisions to X/Q and D/Q can be performed using NUREG/CR-2919, XOQDOQ, Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations

River Bend Station 2015 Annual Radiological EffiuentRelease Report Page 54 of72 TABLE7 GROUNDWATER MONITORING WELL SAMPLE RESULTS

River Bend Station 2015 Annual Radiological Effluent Release Report Page 55 of72 Station Start Date Analysis Reportable Results Units MW-01 11/19/2015 9:57 H-3 (DIST) <631 pCi/L MW-02 11/18/2015 14:00 H-3 (DIST) <467 pCi/L MW-03 12/3/2015 11:10 H-3 (DIST) <562 pCi/L MW-04 2/3/2015 10:32 H-3 (DIST) <563 pCi/L MW-04 5/6/2015 13:48 H-3 (DIST) <675 pCi/L MW-04 8/19/2015 12:55 H-3 (DIST) <717 pCi/L MW-04 11/18/2015 16:15 H-3 (DIST) <468 pCi/L MW-05 12/2/2015 13:50 H-3 (DIST) <562 pCi/L MW-06 2/3/2015 15:27 H-3 (DIST) <562 pCi/L MW-06 5/6/2015 12:50 H-3 (DIST) <669 pCi/L MW-06 8/19/2015 11:50 H-3 (DIST) <729 pCi/L MW-06 11/18/2015 14:30 H-3 (DIST) <470 pCi/L MW-07 11/19/2015 11:20 H-3 (DIST) <617 pCi/L MW-07-DUP 11/19/2015 11:30 H-3 (DIST) <630 pCi/L MW-08 5/6/2015 16:35 H-3 (DIST) <665 pCi/L MW-08 12/3/2015 13:50 H-3 (DIST) <562 pCi/L MW-09 11/19/2015 14:00 H-3 (DIST) <473 pCi/L MW-10 11/19/2015 9:45 H-3 (DIST) <472 pCi/L MW-100 2/4/2015 8:50 H-3 (DIST) <560 pCi/L MW-100 5/6/2015 12:40 H-3 (DIST) <676 pCi/L MW-100-DUP 5/6/2015 12:45 H-3 (DIST) <669 pCi/L MW-100 8/20/2015 10:11 H-3 (DIST) <728 pCi/L MW-100 11/18/2015 15:00 H-3 (DIST) <478 pCi/L

. MW-100-DUP , 11/18/2015 15:15 H-3 (DIST) . <478 pCi/L MW-102 11/19/2015 14:41 H-3 (DIST) <622 pCi/L MW-103 2/2/2015 13:29 H-3 (DIST) <567 pCi/L MW-103 5/5/2015 16:12 H-3 (DIST) <657 pCi/L MW-103-DUP 5/5/2015 16:15 H-3 (DIST) <658 pCi/L MW-103 8/18/2015 10:35 H-3 (DIST) <696 pCi/L MW-103-DUP 8/18/2015 10:40 H-3 (DIST) <690 pCi/L MW-103 11/17/2015 11:41 H-3 (DIST) <711 pCi/L MW-103-DUP 11/17/2015 11:51 H-3 (DIST) <707 pCi/L MW-104 2/3/2015 8:17 H-3 (DIST) <568 pCi/L MW-104 5/6/2015 8:50 H-3 (DIST) <669 pCi/L MW-104 8/19/2015 11:05 H-3 (DIST) <726 pCi/L MW-104 11/18/2015 10:15 H-3 (DIST) <469 pCi/L MW-104-DUP 11/18/2015 10:24 H-3 (DIST) <480 pCi/L MW-106 2/3/2015 9:32 H-3 (DIST) <545 pCi/L MW-106 5/6/2015 9:25 H-3 (DIST) <674 pCi/L MW-106 8/19/2015 9:32 H-3 (DIST) <714 pCi/L

River Bend Station 2015 Annual Radiological Effluent Release Report Page 56 of72 MW-106 11/18/2015 13:14 H-3 (DIST) <477 pCi/L MW-107 2/3/2015 9:15 H-3 (DIST) <566 pCi/L MW-107 5/6/2015 10:22 H-3 (DIST) <666 pCi/L MW-107 8/19/2015 9:15 H-3 (DIST) <719 pCi/L MW-107-DUP 8/19/2015 9:20 H-3 (DIST) <701 pCi/L MW-107 11/18/2015 14:20 H-3 (DIST) <479 pCi/L MW-108 11/18/2015 11:45 H-3 (DIST) <473 pCi/L MW-11 11/19/2015 9:30 H-3 (DIST) <470 pCi/L MW-110 2/2/2015 16:06 H-3 (DIST) 73100 pCi/L MW-110 5/5/2015 13:06 H-3 (DIST) 24800 pCi/L MW-110 8/18/2015 12:55 H-3 (DIST) ..:. 34600 pCi/L MW-110 11/17/2015 13:05 H-3 (DIST) 38700 pCi/L MW-111 2/3/2015 12:37 H-3 (DIST) <570 pCi/L MW-111 5/6/2015 11:57 H-3 (DIST) <661 pCi/L MW-111 8/19/2015 8:10 H-3 (DIST) <720 pCi/L MW-111 11/18/2015 15:30 H-3 (DIST) <479 pCi/L MW-112 2/2/2015 12:34 H-3 (DIST) 10900 pCi/L MW-112 5/5/2015 10:50 H-3 (DIST) 8820 pCi/L MW-112 8/18/2015 14:00 H-3 (DIST) 8830 pCi/L MW-112 11/17/2015 16:50 H-3 (DIST) 11000 pCi/L MW-112-DUP 11/17/2015 17:00 H-3 (DIST) 10700 pCi/L MW-114 2/2/2015 11:43 H-3 (DIST) 2290 pCi/L MW-114-DUP 2/2/2015 11:50 H-3 (DIST) 2420 pCi/L MW-114 5/5/2015 12:00 H-3 (DIST) 2640 pCi/L MW-114 . 8/18/2015 14:35' H-3 (DIST) 1670 pCi/L MW-114 11/17/2015 15:47 H-3 (DIST) 2360 pCi/L MW-116 2/2/2015 16:45 H-3 (DIST) 3700 pCi/L MW-116-DUP 2/2/2015 16:50 H-3 (DIST) 3620 pCi/L MW-116 5/5/2015 17:00 H-3 (DIST) 4300 pCi/L MW-116 8/18/2015 16:53 H-3 (DIST) 1110 pCi/L MW-116 11/17/2015 13:25 H-3 (DIST) 6410 pCi/L MW-118 2/2/2015 14:27 H-3 (DIST) 4590 pCi/L MW-118 5/5/2015 14:10 H-3 (DIST) 3490 pCi/L MW-118 8/18/2015 15:40 H-3 (DIST) 4050 pCi/L MW-118 11/17/2015 14:25 H-3 (DIST) 4910 pCi/L MW-12 11/19/2015 12:11 H-3 (DIST) <607 pCi/L MW-120 2/3/2015 12:02 H-3 (DIST) <570 pCi/L MW-120 5/6/2015 11:10 H-3 (DIST) <656 pCi/L MW-120 8/18/2015 17:35 H-3 (DIST) <720 pCi/L MW-120 11/18/2015 17:00 H-3 (DIST) <475 pCi/L MW-122R I 2/3/2015 11:00 H-3 (DIST) <570 pCi/L

River Bend Station 2015 Annual Radiological Effluent Release Report Page 57 of72 MW-122R 5/6/2015 14:27 H-3 (DIST) <670 pCi/L MW-122R 8/19/2015 12:30 H-3 (DIST) <726 pCi/L MW-122R 11/18/2015 15:00 H-3 (DIST} <473 pCi/L MW-124 2/3/2015 9:43 H-3 (DIST) 1010 pCi/L MW-124 5/5/2015 15:10 H-3 (DIST} 2740 pCi/L MW-124 8/19/2015 15:55 H-3 (DIST} 4860 pCi/L MW-124 11/18/2015 13:51 H-3 (DIST) 4710 pCi/L MW-125 2/3/2015 13:48 H-3 (DIST} 201,000 pCi/L MW-126 2/2/2015 15:35 H-3 (DIST) <565 pCi/L MW-126 5/6/2015 9:05 H-3 (DIST} <669 pCi/L MW-126 8/19/2015 15:05 H-3 (DIST} <701 pCi/L MW-126 11/17/2015 16:32 H-3 (DIST) <697 pCi/L MW-128 2/3/201517:10 H-3 (DIST} <573 pCi/L MW-128 5/6/2015 13:33 H-3 (DIST} <675 pCi/L MW-128 8/20/2015 11:00 H-3 (DIST) <598 pCi/L MW-128 11/18/2015 16:42 H-3 (DIST} <476 pCi/L MW-13 12/3/2015 13:30 H-3 (DIST} <562 pCi/L MW-130 2/3/2015 15:29 H-3 (DIST) <569 pCi/L MW-130-DUP 2/3/2015 15:39 H-3 (DIST) <556 pCi/L MW-130 5/6/2015 16:15 H-3 (DIST) <660 pCi/L MW-130 8/20/2015 10:56 H-3 (DIST) <604 pCi/L MW-130 11/19/2015 10:45 H-3 (DIST) <615 pCi/L MW-131 2/3/2015 14:44 H-3 (DIST) <554 pCi/L MW-131 5/6/2015 16:05 H-3 (DIST} <664 pCi/L MW-131 . 8/20/2015 10:45 H-3 (DIST) <603 pCi/L MW-131 11/19/2015 11:25 H-3 (DIST) <609 pCi/L MW-132 2/3/2015 16:13 H-3 (DIST) <575 pCi/L MW-132 5/6/2015 15:20 H-3 (DIST) <658 pCi/L MW-132 8/20/2015 9:58 H-3 (DIST} <597 pCi/L MW-132 11/18/2015 12:20 H-3 (DIST) <471 pCi/L MW-134 2/3/2015 17:03 H-3 (DIST) <571 pCi/L MW-134 5/6/2015 14:45 H-3 (DIST) <668 pCi/L MW-134 8/20/2015 11:30 H-3 (DIST} <715 pCi/L MW-134-DUP 8/20/2015 11:40 H-3 (DIST) <713 pCi/L MW-134 11/18/2015 11::10 H-3 (DIST) <475 pCi/L

'MW-137 2/2/2015 16:49 H-3 (DIST) 28,200 pCi/L MW-137 5/5/2015 16:15 H-3 (DIST) 20,900 pCi/L MW-137 8/18/2015 17:20 H-3 (DIST) 26,600 pCi/L MW-137-DUP 8/18/2015 17:25 H-3 (DIST} 26,900 pCi/L MW-137 11/17/2015 14:45 H-3 (DIST} 32,400 pCi/L MW-139 2/2/2015 13:00 H-3 (DIST} 1,550 pCi/L

River Bend Station 2015 Annual Radiological Effluent Release Report Page 58 of72 MW-139 5/5/2015 13:17 H-3 (DIST) 1,130 pCi/L MW-139 8/18/2015 16:10 H-3 (DIST) 1,310 pCi/L MW-139 11/17/2015 15:40 H-3 (DIST) 2,070 pCi/L MW-14 12/2/2015 16:45 H-3 (DIST) <562 pCi/L MW-141 2/2/2015 13:45 H-3 (DIST) 920 pCi/L MW-141 5/5/2015 14:40 H-3 (DIST) <661 pCi/L MW-141 8/18/2015 15:25 H-3 (DIST) <713 pCi/L MW-141 11/18/2015 9:30 H-3 (DIST) 1,550 pCi/L MW-141-DUP 11/18/2015 9:40 H-3 (DIST) 1,600 pCi/L MW-142 2/3/2015 15:45 H-3 (DIST) <572 pCi/L MW-142 5/6/2015 13:10 H-3 (DIST) <660 pCi/L MW-142 8/19/2015 10:33 H-3 (DIST) <729 pCi/L MW-142 12/2/2015 9:55 H-3 (DIST) <562 pCi/L MW-144 2/3/2015 14:30 H-3 (DIST) <565 pCi/L MW-144 5/6/2015 12:35 H-3 (DIST) <666 pCi/L MW-144 8/19/2015 9:52 H-3 (DIST) <644 pCi/L MW-144 12/2/2015 8:50 H-3 (DIST) <504 pCi/L MW-144-DUP 12/2/2015 9:05 H-3 (DIST) <512 pCi/L MW-146 2/3/2015 12:15 H-3 (DIST) 139,000 pCi/L MW-146 5/6/2015 11:50 H-3 (DIST) 59,200 pCi/L MW-146 8/19/2015 13:30 H-3 (DIST) 91,900 pCi/L MW-146 12/1/2015 15:36 H-3 (DIST) 149,000 pCi/L MW-147 2/3/2015 12:55 H-3 (DIST) 82,200 pCi/L MW-147 5/6/2015 11:15 H-3 (DIST) 87,600 pCi/L MW-147 8/19/2015 13:36 H-3 (DIST) 49,600 pCi/L MW-147 12/1/2015 15:35 H-3 (DIST) 91,800 pCi/L MW-148 2/3/2015 13:30 H-3 (DIST) <556 pCi/L MW-148 5/6/2015 13:50 H-3 (DIST) <670 pCi/L MW-148 8/19/2015 10:12 H-3 (DIST) <724 pCi/L MW-148 12/1/2015 14:52 H-3 (DIST) <522 pCi/L MW-15 11/18/2015 11:40 H-3 (DIST) <470 pCi/L MW-151 2/2/2015 13:45 H-3 (DIST) <587 pCi/L MW-151 5/5/2015 13:35 H-3 (DIST) <661 pCi/L MW-151 8/18/2015 15:35 H-3 (DIST) <685 pCi/L MW-151 11/17/2015 14:25 H-3 (DIST) <706 pCi/L MW-153 2/3/2015 16:28 H-3 (DIST) <618 pCi/L MW-153 5/6/2015 15:07 H-3 (DIST) <665 pCi/L MW-153 8/19/2015 14:02 H-3 (DIST) <719 pCi/L MW-153 11/18/2015 13:00 H-3 (DIST) <470 pCi/L MW-155 2/2/2015 16:30 H-3 (DIST) <573 pCi/L MW-155 5/5/2015 16:20 H-3 (DIST) 17,000 pCi/L

River Bend Station 2015 Annual Radiological Effluent Release Report Page 59 of72 MW-155 8/19/2015 15:04 H-3 (DIST) <688 pCi/L MW-155 11/17/2015 16:40 H-3 (DIST) 6,560 pCi/L MW-156 2/3/2015 10:27 H-3 (DIST) 857 pCi/L MW-156 5/5/2015 17:00 H-3 (DIST) 1,800 pCi/L MW-156 8/19/2015 15:40 H-3 (DIST) 1,950 pCi/L MW-156 11/17/2015 16:05 H-3 (DIST) 2,010, pCi/L MW-157 2/3/2015 11:10 H-3 (DIST) 260,000 pCi/L MW-157 5/5/201517:25 H-3 (DIST) 171,000 pCi/L MW-157 8/19/2015 15:07 H-3 (DIST) 105,000 pCi/L MW-157 11/17/2015 15:27 H-3 (DIST) 129,000 pCi/L MW-158 2/3/2015 9:45 H-3 (DIST) 575,000 pCi/L MW-158 5/6/2015 10:45 H-3 (DIST) 630,000 pCi/L MW-158 8/19/2015 10:00 H-3 (DIST) 510,000 pCi/L MW-158 12/1/2015 14:10 H-3 (DIST) 519,000 pCi/L MW-159 2/3/2015 10:40 H-3 (DIST) 3,800 pCi/L MW-159 5/6/2015 10:00 H-3 (DIST) 11,200 pCi/L MW-159-DUP 5/6/2015 10:15 H-3 (DIST) 11,800 pCi/L MW-159 8/19/2015 10:25 H-3 (DIST) 1,860 pCi/L MW-159-DUP 8/19/2015 10:30 H-3 (DIST) 2,080 pCi/L MW-159 12/1/2015 15:00 H-3 (DIST) 12,900 pCi/L MW-16 12/3/2015 10:35 H-3 (DIST) <562 pCi/L MW-161 2/3/2015 13:25 H-3 (DIST) <569 pCi/L MW-161-DUP 2/3/2015 13:30 H-3 (DIST) <565 pCi/L MW-161 5/6/2015 7:52 H-3 (DIST) <665 pCi/L MW-161-DUP 5/6/2015 7:55 H-3 (DIST) <660 pCi/L MW-161 8/19/2015 10:20 H-3 (DIST) <728 pCi/L MW-161 11/18/2015 9:45 H-3 (DIST) <674 pCi/L MW-162 2/3/2015 11:15 H-3 (DIST) <518 pCi/L MW-162-DUP 2/3/2015 11:30 H-3 (DIST) <576 pCi/L MW-162 5/6/2015 9:20 H-3 (DIST) <665 pCi/L MW-162 8/19/2015 13:30 H-3 (DIST) <678 pCi/L MW-162 12/1/2015 14:03 H-3 (DIST) <508 pCi/L MW-167 11/17/2015 12:26 H-3 (DIST) <644 pCi/L MW-167-DUP 11/17/2015 12:26 H-3 (DIST) <641 pCi/L MW-169 11/17/2015 13:37 H-3 (DIST) <643 pCi/L MW-17 11/19/2015 12:25 H-3 (DIST) <469 pCi/L MW-170 11/18/2015 15:50 H-3 (DIST) <473 pCi/L MW-172 11/18/2015 15:05 H-3 (DIST) <478 pCi/L MW-174 11/18/2015 14:10 H-3 (DIST) ,\ <473 pCi/L MW-18 11/19/2015 16:27 H-3 (DIST) <618 pCi/L MW-180 11/18/2015 12:25 H-3 (DIST) <473 pCi/L

River Bend Station 2015 Annual Radiological Effluent Release Report Page 60 of72 MW-182 11/19/2015 16:25 H-3 (DIST} <631 pCi/L MW-182-DUP 11/19/2015 16:40 H-3 (DIST} <618 pCi/L MW-185 11/17/2015 15:29 H-3 (DIST} <709 pCi/L MW-188 11/18/2015 13:15 H-3 (DIST} <470 pCi/L MW-19 11/19/2015 14:45 H-3 (DIST} <472 pCi/L MW-20 12/2/2015 14:55 H-3 (DIST} <562 pCi/L MW-21 12/3/2015 8:50 H-3 (DIST} <562 pCi/L PZ-01 2/2/2015 11:20 H-3 (DIST) 20,200 pCi/L PZ-01 5/5/2015 15:30 H-3 (DIST) 18,800 pCi/L PZ-01 8/18/2015 11:30 H-3 (DIST} 18,200 pCi/L PZ-01 11/17/2015 15:40 H-3 (DIST} 12,600 pCi/L PZ-02 5/5/2015 17:43 H-3 (DIST} <670 pCi/L PZ-02 11/18/2015 11:15 H-3 (DIST} <615 pCi/L PZ-03 2/3/2015 12:39 H-3 (DIST} <570 pCi/L PZ-03 5/6/2015 11:25 H-3 (DIST} <668 pCi/L PZ-03 8/19/2015 16:00 H-3 (DIST} <596 pCi/L PZ-03 11/18/2015 16:28 H-3 (DIST} <477 pCi/L SW-101 5/7/2015 10:25 H-3 (DIST} <660 pCi/L SW-101 8/19/2015 15:10 H-3 (DIST} <719 pCi/L SW-101 12/3/2015 15:00 H-3 (DIST) <562 pCi/L SW-102 5/7/2015 9:00 H-3 (DIST} <667 pCi/L SW-102 8/19/2015 16:10 H-3 (DIST} <635 pCi/L SW-102 11/19/2015 13:25 H-3 (DIST} <612 pCi/L SW-103 2/4/2015 8:10 H-3 (DIST} <579 pCi/L SW-103 5/7/2015 9:30 H-3 (DIST} <667 pCi/L SW-103 8/19/2015 16:50 H-3 (DIST} <732 pCi/L SW-103 11/19/2015 16:40 H-3 (DIST} <629 pCi/L SW-104 5/7/2015 7:30 H-3 (DIST} <670 pCi/L SW-104 8/19/2015 17:10 H-3 (DIST} <733 pCi/L SW-104 11/19/2015 16:00 H-3 (DIST} <470 pCi/L T-14 11/19/2015 15:21 H-3 (DIST} <622 pCi/L Hard-To-Detects Station Start Date Analysis Reportable Results Units MW-158 HTD 2/3/2015 10:05 FE-55 <91.64 pCi/L MW-158 HTD 2/3/2015 10:05 Nl-63 <15.5 pCi/L MW-158 HTD 2/3/2015 10:05 SR-89 <9.25 pCi/L MW-158 HTD 2/3/2015 10:05 SR-90 <2.27' pCi/L MW-158 HTD 2/3/2015 10:05 CM-242 (AS} <0.2018 pCi/L CM-243/244 MW-158 HTD 2/3/2015 10:05 (AS} <0.1009 pCi/L

River Bend Station 2014 Regulatory Guide 1.21 Page61 of72 Station StartDate Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 . Cs-137 Ba-140 La-140 MW-01 11/19/2015 <6.474 <5.916 <14.19 <6.91 <13.37 <5.312 <10.51 <11.17 <6.447 <6.987 <30.28 <7.305 MW-;<J2 11/18/2015 <5.627 <5.727 <13.63 <4.82 <9.85 <4.929 <10.45 <14. 76 <5.023 <5.273 <37 .84 <10.95 MW-03 12/3/2015 <.9513 <1.01 <2.461 <.8901 <1.778 <l.161 <l.923 <8.559 <.8795 <l.006 <11.82 <3.573 MW-04 2/3/2015 <2.264 <2.421 <4.633 <1.916 <3.05 <2.058 <3.696 <10.37 <1.904 <2.236 <19. 75 <4.949 MW-04 5/6/2015 <1.728 <l.815 <4.18 <l.672 <3.544 <l.983 <3.437 <7. 789 <l.689 <1.816 <14. 7 <5.604 MW-04 8/19/2015 <3.627 <5.679 <9.324 <6.227 <6.626 <5.628. <9.336 <13.69 <5.069 <6.522 <29.58 <10.39 MW-04 11/18/2015 <5.652 <6.657 <13.73 <4.015 <10.94 <6.398 <9.269 <14.66 <5.222 <5.368 <33.4 <12.13 MW-05 12/2/2015 <1.06 <l.156 <2.481 <1.064 <2.157 <1.204 <2.231 <8.958 <.8686 <.9496 <13.74 <4.779 MW-06 2/3/2015 <2.061 <2.36 <6.624 <2.351 <5.162 <2.401 <4.154 <9.909 <2.283 <2.215 <20.94 <5.4 MW-06 5/6/2015 <l.961 <l.943 <4.45 . <1.947 <3.852 <2.154 <3.677 <8.601 <1.846 <l.89 <16.63 <5.619 MW-06 8/19/2015 <4.671 <4.927 <10.49 <4.847 <8.14 <5.148 <8.192 <14.82 <4.138 <5.075 <34.03 <10.17 MW-06 11/18/2015 <4.318 <5.016 <8.431 <4.856 <7.182 <5.417 <8.307 <10.35 <4.539 <4.493 <22.13 <6.198 MW-07 11/19/2015 <5.062 <5.213 <12.59 <5.918 <9.822 <7. 748 <12.35 <10.07 <5.106 <5.896 <29.28 <9.787

"\ MW-07-DUP 11/19/2015 . <5.054 <7.181 <12.72 <4.852 <14.35 <7.713 <5.141 <8.761 <7.209 <7.171 <32.8 <12.04 MW-08 5/6/2015 <3.416 <3.594 <7.525 <3.252 <7.115 <3.55 <6.534 <12.99 <2.892 <3.163 <27.43 <11.05 MW-08 12/3/2015 <.9083 <l.162 <2.583 <.9829 <2.134 <1.208 <2.217 <8.752 <.8647 <l.16 <12.95 <3.795 MW-09 11/19/2015 <5.496 <5.896 <12.63 <5.66 <12.2 <5.363 <9.645 <14.38 <5.022 <6.591 <38.49 <11.8 MW-10 11/19/2015 <4.099 <5.105 <8.999 <4.033 <8.906 <5.583 <8.439 <14.93 <4.606 <4.645 <31.31 <8.523 MW-100 2/4/2015 <2.232 <1.801 <4.679 <l.609 <4.67 <2.094 <3.934 <9.773 <1.874 <2.001 <17.09 <4.787 MW-100 5/6/2015 <2.845 <2.919 <6.468 <2.645 <5.078 <3.068 <5.671 <10.65 <2.617' <2.711 <23.08 <7.102 MW-100-DUP 5/6/2015 <3.109 <3.42 <8.151 <3.49 <6.215 <3.438 <5.531 <12.41 <2.812 <3.081 <27.14 <8.791 MW-100 8/20/2015 <3.723 <4.474 <8.534 <4.17 <8.029 <4.465 <7.316 <11.13 <3.87 <4.666 <29.24 <6.904 MW-100 11/18/2015 <6.433 <6.096 <14.61 <7.665 <13.02 <7 .094 <11. 73 <12.27 <6.976 <7 .003 <29.4 <9.465 MW-100-DUP 11/18/2015 <5.452 <6.908 <13.85 <8.748 <14.69 <9.235 <9.558 <10.26 <6.47 <8.12 <31.8 <8.268 MW-102 11/19/2015 <6.803 <5.979 <12.96 <7.783 <13.48 <8.306 *, <12.03 <11.88 <6.886 <7.733 <35.06 <12.02 MW-103 2/2/2015 <2.417 <2.599 <5.014 <2.2 <1.87 <3.548 <5.04 <14.34 <2.061 <3.01 <22.48 <6.557 MW-103 5/5/2015 <2.067 <2.151 <5.13 <1.905 <4.184 <2.418 <3.913 <9.888 <1. 796 <2.052 <18.63 <5.596

(

River Bend Station 2014 Regulatory Guide l.21 Page 62 of72 MW-103-DUP 5/5/2015 <2.281 <2.651 <6.468 <2.465 <4.56 <2.909 <4.947 <13.28 <2.239 <2.428 <21.25 <7.858 MW-103 8/18/2015 <5.648 <6.404 <11.64 <4.268 <11.24 <5.84 <10.73 <9.868 <5.986 <4.797 <25.21 <9.107 MW-103-DUP 8/18/2015 <6.897 <8.113 <14.l ~5.176 <16.86 <10.69 <11.86 <14.02 <6.808 <8.746 <39.71 <10.88 MW-103 11/17/2015 <6.84 <6.946 <12.06 <7.039 <14.42 <8.383 <13.64 <14.42 <8.908 <8.085 <38.47 <7.637 MW-103-DUP 11/17/2015 <7.833 <8.403 <15.84 <8.694 <12.87 <9.696 <14.47 <11.99 <6.677 <6.799 <37.81 <12.92 MW-104 2/3/2015 <l.922 <l.919 <4.345 <1.99 <3.648 <1.899 <3.747 <8.902 <1.738 <l.975 <19.37 <4.476 MW-104 5/6/2015 <2.122 <2.396 <5.51 <2.095 <4.445 <2.5 <4.371 <10.85 <2.205 <2.28 <20.45 <5.91 MW-104 8/19/2015 <5.345 <5.209 <11.11 <5.571 <11.14 <4.9 <9.838 <14.04 <4.575 <5.818 <32.67 <9.173 MW-104 11/18/2015 <4.557 <5.155 <11.14 <4.658 <8.55 <5.379 <8.959 <14.95 <4.844 <5.113 <32.98 <9.222 MW-104-DUP 11/18/2015 <3.875 <4.366 <10.37 <3.721 <9.328 <4.752 <7.779 <14.06 <4.054 <4.629 <28.89 <9.907 MW-106 2/3/2015 <2.411 <2.96 <5.821 <3.689 <5.906 <2.711 <5.826 <13.65 <l.799 <2.749 <27.01 <8.933 MW-106 5/6/2015 <1.895 <2.185 <4.76 <2.357 <4.096 <2.323 <3.942 <8.143 <1.807 <2.151 <17.67 <5.939 MW-106 8/19/2015 <4.774 <5.595 <11.71 <4.928 <10.17 <5.498 <10.87 <14.59 <4.897 <6.176 <32.71 <11.39 MW-106 11/18/2015 <3.351 <3.882 <8.779 <3.294 <7.1 <4.397 <7.192 <13.19 <3.829 <4.088 <27.2 <6.534 MW-107 2/3/2015 <l.626 <2.228 <5.573 <3.002 <4.072 <2.327 <4.834 <11.02 <2.07 <2.263 <16.66 <5.184 MW-107 5/6/2015 <3.175 <3.299 <7.753 <3.245 <5.874 <3.3 <6.098 <11.57 <2.929 <3.29 <24.4 <7.251 MW-107 8/19/2015 <4.113 <4.981 <9.378 <5.425 <11.16 <5.756 <10.19 <13.39 <4.732 <4.984 <30.89 <10.04 MW-107-DUP 8/19/2015 <5.838 <6.014 <14.98 <4.945 <12.07 <6.862 <11.54 <14.67 <4.802 <6.96 <38.37 <11.75 MW-107 11/18/2015 <5.181 <5.218 <12.06 <5.956 <10.27 <5.08 <9.851 <14.92 <4.595 <6.181 <38 <9.854 MW-108 11/18/2015 <4.239 <3.982 <9.582 <3.237 <7.396 <4.756 . <9.194 <12.06 <4.33 <4.653 <27.54 <10.88 MW-11 11/19/2015 <4.136 <4.465 <9.806 <3.941 <7.245 <4.888 <8.49 <13.58 <3.933 <4.814 <29.36 <9.091 MW-110 2/2/2015 <2.799 <3.01 <5.557 <3.44 <5.229 <2.679 <5.602 <14.78 <2.957 <3.173 <23.05 <7.313 MW-110 5/5/2015 <2.405 <2.852 <6.941 <3.002 <6.036 <3.062 <5.136 <13.78 <2.519 <2.847 <23.35 <8.328 MW-110 8/18/2015 <5.496 <5.494 <10.75 <5.892 <12.83 <6.902 <9.845 <11.28 <5.608 <6.222 <27.1 <9.505 MW-110 11/17/2015 <5.761 <5.121 <12.63 <6.164 <11.25 <7.53 <10.02 <8.796 <5.841 <5.604 <24.89 <9.653 MW-111 2/3/2015 <2.056 <1.491 <4.839 <1.733 <4.535 <2.007 <3.399 <10.66 <l.808 <2.104 <20.82 <4.185 MW-111 5/6/2015 <2.806 <2.839 <6.13 <2.764 <5.341 <3.039 <5.692 <10.88 <2.73 <2.756 <21.04 <6.791 MW-111 8/19/2015 <5.453 <4.841 <12.27 <5.188 <9.718 <5.208 <10.03 <14.82 <4.743 <5.749 <33.4 <9.509 MW-111 11/18/2015 <4.217 <3.558 <9.651 <3.352 <8.775 <4.6 <8.115 <13.66 <4.304 <4.099 <31.31 <10.31 MW-112 2/2/2015 <2.928 <2.792 <5.626 <4.629 <4.806 <3.271 <5.373 <14.57 <2.506 <2.899 <25.19 <9.152

River Bend Station 2014 Regulatory, Guide l.21 Page63 of72 MW-112 5/5/2015 <2.498 <3.087 <5.873 <2.926 <5.538 <3.139 <5.095 <14.39 <2.433 <2.824 <25.92 <8.025 MW-112 8/18/2015 <6.531 <6.115 <14.72 <8.523 <14.2 <7.275 <12.36 <12.64 <6.116 <8.377 <37.5 <14.39 MW-112 11/17/2015. <5.472 <5.388 <16.3 <4.971 <14.92 <8.126 <11.3 <10.66 <6.421 <7.478 <31.27 <10.9 MW-112-DUP 11/17/2015 <5.37 <5.772 <11.67 <6.209 <15.17 <7.566 <9.135 <10.26 <6.203 <5.664 <31.85 <7.892 MW-114 2/2/2015 <2.02 <2.44 <4.239 <1.798 <3.387 <2.451 <3.321 <9.899 <2.203 <1.7 <21.37 <5.502 MW-114-DUP 2/2/2015 <2.529 <1.897 <3.718 <l.616 <6.021 <1.938 <5.539 <13.11 <2.601 <2.55 <28.8 <4.094 MW-114 5/5/2015 <2.113 <2.372 <5.352 <2.006 <4.308 <2.497 <4.267 <10.07 <l.948 <2.216 <20.51 <7.026 MW-114 8/18/2015 <5.985 <7 <11.73 <6.792 <10.36 <7.263 <10.89 <12.46 <5.931 <5.6 <32.12 <7.477 MW-114 11/17/2015 <7.097 <10.45. <13.97 <4.899 <16.43 <7.533 <13.8 <13.26 <7.719 <7.978 <36.55 <13.2 MW-116 2/2/2015 <2.625 <2.366 <4.071 <2.028 <4.68 <3.031 <4.225 <12.52 <1.98 <2.18 <22.52 <7.641 MW-116-DUP 2/2/2015 <3 <3.714 <7.34 <3.38 <5.066 <3.176 <6.036 '<14.75 <2.783 <2.917 <23.07 <7.465 MW-116 5/5/2015 <l.46 <1.754 <4.16 <l.548 <2.997 <l.827 <3.109 <8.34 <1.391 <l.562 <14.82 <4.425 MW-116 8/18/2015 <8.23 <6.112 <15.34 <8.832 <18.38 <10.96 <16.25 <14.89 <6.906 <8.122 <35.94 <14.6 MW-116 11/17/2015 <7.105 <7.197 <16.66 <7.275 <12.09 <8.468 <11.67 <12.86 <5.238 <6.722 <31.71 <8.962 MW-118 2/2/2015 <3.955 <3.503 <6.79 <3.497 <6.751 <3.917 <6.94 <14.48 <3.191 <4.007 <33.04 <10.67 MW-118 5/5/2015 <3.098 <3.039 <7.568 <3.132 <7.497 <3.811 <6.112 <14.61 <2.871 <3.158 <26.93 <9.927 MW-118 8/18/2015 <4.725 <5.786 <10.07 <5.95 <9.723 <5.889 <7.335 <9.126 <5.028 <5.787 <24.79 <7.758 MW-118 11/17/2015 <6.262 <6.169 <13.97 <7.558 <12.57 <7.26 <12.62 <12.93 <6.98 <6.874 <26.98 <10.07 MW-12 11/19/2015 <5.528 <5.653 <12.05 <5.512 <12.45 <6.266 <8.688 <9.342 <4.853 <6.367 <27.34 <9.056 MW-120 2/3/2015 <2.232 <2.818 <5.613 <2.442 <3.665 <2.759 <4.507 <14.65 <2.242 <l.932 <19.7 <5.4 MW-120 5/6/2015 <3.209 <3.682 <8.163 <2.929 <6.703 <3.97 <7.131 <13.91 <3.384 <3.586 <28.6 <8.506 MW-120 8/18/2015 <4.793 <5.525 <13.14 <4.588 <10.13 <5.494 <11.22 <14.94 <4.81 <4.864 <32.52 <13.03 MW-120 11/18/2015 <4.952 <3.988 <11.91 <4.598 <8.09 <5.003 <8.401 <13.74 <4.456 <4.258 <29.24 <12.82 MW-122R 2/3/2015 <2.196 <2.118 <3.274 <2.238 <4.28 <3.12 <4.506 <11 <2.011 <2.042 <16.02 <7.734 MW-122R 5/6/2015 <2.089 <2.104 <4.651 <2.259 <4.086 <2.404 <3.945 <8.499 <1.851 <2.145 <17.83 <5.348 MW-122R 8/19/2015 <4.481 <5.415 <10.28 <5.342 <10.07 <5.731 <8.827 <12.88 <4.683 <5.254 <29.49 <7.508 MW-122R 11/18/2015 <3.936 <3.085 <8.461 <3.97 <7.818 <4.904 <8.517 <12.4 <4.632 <4.959 <28.17 <7.667 MW-124 2/3/2015 <2.973 <3.371 <7.579 <3.364 <6.541 <2.919 <6.47 <14.55 <3.067 <3.529 <29.37 <7.065 MW-124 5/5/2015 <2.105 <2.221 <5.321 <2.202 <4.614 <2.644 <4.289 <10.81 <1.93 <2.167 <19.59 <6.528 MW-124 8/19/2015 <7.474 <7.897 <16.14 <6.269 <13.43 <7.274 <14.29 <13.12 <6.828 <6.56 <36.13 <8.639

River Bend Station 2014 Regulatory Guide 1.21 Page64 of72 MW-124 11/18/2015 <6.229 <6.973 <17.16 <7.233 <15.11 <7.991 <15.15 <12.44 <7.871 <6.589 <38.3 <13.01 MW-125 2/3/2015 <2.447 <2.576 <5.965 <2.802 <5.708 <2.915 <5.179 <13.57 <2.56 <2.992 <27.14 <5.064 MW-126 2/2/2015 <3.238 <3.056 <7.478 <2.834 <5.791 <3.43 <5.436 <13.67 <3.051 <3.247 <30.86 <9.501 MW-126 5/6/2015 <1.871 <2.219 <4.861 <2.027 <4.053 <2.441 <4.041 <10.44 <1.949 <2.067 <18.79 <6.251 MW-126 8/19/2015 <7.401 <5.338 <13.47 <5.901 <10.32 <8.468 <11.46 <11.66 <7.169 <7.658 <37.02 <10.65 MW-126 11/17/2015 <6.613 <6.865 <16.73 <6.647 <13.42 <6.988 <13.11 <14.11 <7.449 <8.01 <34.35 <12.3 MW-128 2/3/2015 <2.033 <3.18 <5.116 <1.89 <5.024 <2.909 <5.304 <13.34 <2.31 <2.944 <24.34 <7.274 MW-128 5/6/2015 <2.284 <2.612 <5.822 <2.297 <4.886 <2.891 <4.845 <11.32 <2.337 <2.426 <21.11 <6.762 MW-12a 8/20/2015 <5.566 <6.174 <10.67 <5.917 <11.32 <6.562 <9.062 <13.97 <4.797 <5.31 <31.99 <9.624 MW-128 11/18/2015 <4.897 <4.361 <10.49 <4.711 <9.853 <5.29 <8.848 <14.92 <4.623 <5.577 <33.9 <12.35 MW-13 12/3/2015 <1.339 <l.69 <3.473 <1.5 <3.077 <l.697 <2.898 <10.12 <1.268 <1.222 <17.41 <5.26 MW-130 2/3/2015 <2.47 <2.929 <6.845 <2.506 <4.884 <3.316 <5.631 <13.17 <2.631 <2.834 <23.7 <7.065 MW-130 5/6/2015 <2.632 <3.008 <6.862 <2.647 <5.99 <3.055 <5.421 <10.69 <2.291 <2.593 <20.57 <7.606 MW-130 8/20/2015 <4.225 <4.956 <8.71 <4.52 <9.005 <4.974 <7.471 <9.291 <3.536 <4.026 <25.37 <11.21 MW-130 11/19/2015 <6.551 <5.592 <13.94 <5.878 <10.24 <7.104 <12.11 <12.17 <8.356 <7.343 <27 <9.248 MW-13CJ.-DUP 2/3/2015 <2.049 <2.524 <5.105 <2.544 <3.857 <2.924 <4.535 <10.92 <2.22 <2.529 <17.56 <6.579 1

MW-131 2/3/2015 <2.264 <3.135 <4.452 <2.207 <4.354 <2.177 <4.784 <11.26 <2.408 <2.921 <22.63 <4.799 MW-131 5/6/2015 <3.609 <3.899 <8.342 <4.407 <7.601 <4.102 <7.109 <10.86 <3.569 <3.906 <26.27 <9.308 MW-131 8/20/2015 <3.923 <4.605 <8.723 <3.773 <10.74 <4.705 <8.459 <11.17 <4.217 <4.337 <27.85 <7.139 MW-131 11/19/2015 <7.566 <5.556 <10.26 <4.757 <10.55 <5.662 <10.5 <12.46 <5.239 <6.137 <25.99 <9.021 MW-132 2/3/2015 <2.125 <2.647 <5.554 <2.549 <4.304 <3.212 <4.568 <12.4 <2.223 <2.558 <21.62 <5.828 MW-132 5/6/2015 <2.437 <2.809 <5.931 <2.668 <5.971 <2.73 <4.801 <9.153 <2.48 <2.636 <19.2 <5.86 MW-132 8/20/2015 <3.261 <4.095 <8.955 <3.485 <7.903 <4.595 <7.403 <10.6 <3.553 <4.129 <25.96 <7.74 MW-132 11/18/2015 <2.171 <2.334 <5.66 <2.109 <4.677 <2.671 <4.637 <12.74 <2.217 <2.346 <23.63 <6.291 MW-134 2/3/2015 <l.837 <2.254 <5.09 <2.674 <4.432 <2.172 <3.581 <11.85 <1.718 <1.714 <21.44 <5.079 MW-134 5/6/2015 <2.27i <2.403 <5.231 <2.241 <4.219 <2.586 <4.494 <8.157 <2.19 <2.23 <19.14 <5.376 MW-134 8/20/2015 <4.65 <4.672 <10.66 <4.308 <8.971 <4.671 <8.93 <11.06 <4.136 <4.718 <28.52 <8.825 MW-134-DUP 8/20/2015 <3.984 <4.225 <8.865 <4.695 <9.185 <4.48 <9.119 <11.77 <4.829 <4.316 <29.24 <9.687 MW-134 11/18/2015 <3.827 <4.998 <11.83 <4.602 <8.613 <5.263 <8.989 <14.62 <4.289 <4.137 <32.39 <10.33 MW-137 2/2/2015 <2.284 <2.6 <5.63 <1.563 <5.268 <2.836 <5.521 <14.21 <2.181 <2.591 <21.14 <6.304

River Bend Station 2014 Regulatory Guide 1.21 Page 65 of72 MW-137 5/5/2015 <2.015 <2.511 <6.054 <2.665 <4.835 <2.559 <4.86 <10.85 <2.108 <2.64 <22.31 <6.968 MW-137 8/18/2015 <5.212 <6.39 <12.18 <6.454 <11.06 <6.103 <10.96 <11.24 <5.314 <6.467 <31.14 <10.16 MW-137-DUP 8/18/2015 <9.121 <8.866 <20.37 <9.556 <12.71 <10.14 <15.08 <13.48 <7.091 <9.133 <40.18 <14.53 MW-137 11/17/2015 <7.934 <8.781 <18.04 <8.626 <14.12 <7.795 <12.91 <11.16 <7.789 <8.826 <34.11 <8.892 MW-139 2/2/2015 <2.303 <2.736 <5.037 <l.612 <4.279 <2.696 <3.774 <12.16 <2.113 <2.194 <21.88 <6.967 MW-139 5/5/2015 <2.724 <2.819 <6.549 <2.633 <5.624 <3.211 <5.37 <14.1 <2.601 <2.599 <25.8 <7.469 MW-139 8/18/2015 <6.091 <5.215 <12.17 <6.276 <11.31 <7.222 <9.003 <10.22 <5.089 <5.987 <26.23 <9.994 MW-139 11/17/2015 <5.833 <6.239 <17.08 <3.199 <9.581 <9.517 <10.66 <13.07 <7.556 <8.49 <36.07 <9.189 MW-14 12/2/2015 <l.888 <2.152 <5.003 <l.885 <3.97 <2.277 <4.058 <10.63 <1.838 <2.045 <19.3 <6.609 MW-141 2/2/2015 <2.679 <2.048 <7.405 <3.684 <3.993 <3.281 I <3.507 <13.15 <2.841 <2.648 <25.22 <6.935 MW-141 5/5/2015 <2.814 <2.971 <6.279 <2.845 <5.453 <3.366 <5.269 <13.97 <2.665 <2.795 <25.6 <7.824 MW-141 8/18/2015 <4.406 <5.42 <11.71 <5.701 <9.485 <6.213 <7.214 <10.91 <5.068 <5.97 <25.48 <6.447 MW-141 11/18/2015 <5.87 <5.989 <10.12 <4.165 <12.6 <8.809 <10.98 <12.36 <7.045 <6.96 <32.19 <6.445 MW-142 2/3/2015 <2.331 <2.592 <4.036 <3.411 <3.022 <3.089 <7.342 <13.86 <1.967 <2.188 <23.7 <8.391 MW-142 5/6/2015 <3 <3.516 <7.527 <3.359 <6.448 <3. 724 <6.244 <14.49 <3.003 <3.407 <26.81 <8.581 MW-142 8/19/2015 <5.392 <5.779 <11.93 <5.284 <10.18 <6.243 <10.1 <14.88 <4.97 <6.042 <35.59 <8.022 MW-142 12/2/2015 <.8172 <.9587 <l.939 <.7288 <1.527 <l.116 <1.595 <7.972 <.7648 <.7686 <11.68 <3.552 MW-144 2/3/2015 <2.607 <2.21 <5.816 <2.277 <4.92 <3.227 <5.836 <14.25 <2.948 <3.065 <25.86 <6.295 MW-144 5/6/2015 <2.295 <2.645 <5.528 <2.383 <4.69 <2.728 <5.014 <12.31 <2.01 <2.446 <22.19 <7.193 MW-144 8/19/2015 <6.424 <9.104 <19.05 <10.54 <14.44 <8.112 <12.3 <14.32 <8.058 <8.493 <39.84 <12.35 MW-144 12/2/2015 <2.27 <2.305 <4.993 <2.516 <4.767 <2.843 <5.116 <12.78 <2.357 <2.513 <24.33 <7.97 MW-144-DUP 12/2/2015. <2.261 <2.677 <6.111 <2.522 <4.966 <2.54 <5.435 <14.26 <2.328 <2.535 <26.16 <7.205 MW-146 2/3/2015 <3.12 <2.921 <6.278 <2.381 <6.431 <2.979 <5.353 <14.94 <2.979 <3.089 <25.3 <4.864 MW-146 5/6/2015 <1.551 <l.74 <4.367 <1.696 <3.428 <2.018 <3.509 <9.055 <1.659 <1.732 <17.27 <5.654 MW-146 8/19/2015 <9.419 <8.179 <17.05 <8.768 <19.62 <8.528 <11. 76 <14.6 <8.255 <7.641 <40.88 <8.59 MW-146 12/1/2015 <2.245 <2.485 <5.131 <2.357 <4.719 <2.962 <4.643 <12.62 <2.149 <2.357 <22.12 <6.8 MW-147 2/3/2015 <2.58 <4.122 <7.735 <3.052 <6.691 <3. 785 <5. 967 <14.86 <2.991 <3.277 <21.41 <6.258 MW-147 5/6/2015 <2.149 <2.336 <4.767 <2.104 <4.322 <2.496 <4. 369 <10.67 <2.082 <2.243 <19.58 <5.662 MW-147 8/19/2015 <7.54 <4.204 <11.57 <8.167 <14.27 <8.903 <10.4 <11.67 <6.959 <8.309 <34.17 <11.55 MW-147 12/1/2015 <2.894 <3.239 <7.036 <2.637 <5.432 <3.007 <4.84 <14.35 <2.592 <2.841 <28.49 <8.804

River Bend Station 2014 Regulatory Guide 1.21 Page66 of72 MW-148 2/3/2015 <3.34 <3.32 <7.154 <3.31 <6.499 <4.031 <6.814 <14.42 <3.121 <2.994 <26.46 <10.31 MW-148 5/6/2015 <3.046 <3.798 <6.797 <3.336 <6.811 <3.598 <6.129 <13 <3.016 <3.478 <26.52 <7.758 MW-148 8/19/2015 <4.646 <3.891 <8.527 <3.223 <8.098 <4.879 <7.005 <11.15 <3.516 <4.402 <25.16 <11.08 MW-1~8 12/1/2015 <l.217 <l.377 <3.308 <1.177 <2.421 <l.439 <2.601 <13.17 <1.151 <l.264 <18.31 <4.834 MW-15 11/18/2015 <6.043 <5.408 <13.47 <6.385 <11.94 <6.446 <10.88 <11.18 <5.841 <6.512 <31.46 <9.882 MW-151 2/2/2015 <2.421 <2.279 <4.708 <2.931 <3.906 <2.043 <5.326 <14.51 <l.925 <2.365 <24.24 <6.557 MW-151 5/5/2015 <1.775 <l.991 <4.423 <l.773 <3.51 <2.078 <3.358 <9.051 <1.715 <l.781 \ <17.37 <5.221 MW-151 8/18/2015 <6.909 <6.39 <16.96 <4.833 <13.03 <6.823 <12.95 <12.14 <6.223 <7.898 <36.31 <7.374 MW-151 11/17/2015 <7.672 <8.198 <13.04 <7.132 <14.62 <9.22 <13.64 <14.59 <9.534 <9.508 <40.42 <10.03 MW-153 2/3/2015 <3.213 <4.05 <8.657 <4.134 <6.44 <4.093 <6.856 <14.81 <3.337 <3.841 <32.89 <9.33 MW-153 5/6/2015 <3.229 <3.432 <6.812 <3.158 <6.388 <3.696 <5.842 <11'.84 <3.171 <3.239 <23.9 <7.271 MW-153 8/19/2015 <5.094 <4.753 <11.57 <5.555 <10.84 <5.933 <9.486 <13.66 <4.684 <5.423 <25.73 <12.7 MW-153 11/18/2015 <5.334 <4.865 <10.45 <5.466 <11.79 <6.88 <9.679 <14.82 <3.971 <5.965 <40.33 <11.25 MW-155 2/2/2015 <2.653 <l.824 <6.639 <2.631 <5.234 <2.97 <4.565 <12.09 <2.023 <2.719 <25.2 <8.834 MW-155 5/5/2015 <2.182 <2.438 <5.199 <2.307 <4.458 <2.575 <4.569 <12.34 <2.176 <2.295 <21.97 <6.689 MW-155 8/19/2015 <6,122 <6.613 <16.84 <6.761 <15.12 <7.651 <11.62 <11.57 <7.108 <6.367 <32.64 <7.88 MW-155 11/17/2015 <5.602 <4.991 <12.37 <5.516 <11.23 <6.003 <10.06 <10.39 <5.266 <6.481 <26.11 <7.89 MW-156 2/3/2015 <2.244 <2.596 <6.137 <2.879 <5.53 <3.32 <5.478 <9.847 <2.444 <l.919 <22.94 <6.476 MW-156 5/5/2015 <2.029 <2.422 <5.658 <2.426 <4.211 <2.47 <4.229 <11.76 <2.017 <2.242 <20.6 <6.444 MW-156 8/19/2015 <5.891 <6.29 <12.46 <3.825 <11.52 <6.838 <8.027 <10.15 <7.081 <5.423 <31.76 <10.39 MW-156 11/17/2015 <6.189 <6.949 <14.02 <4.202 <10.52 <5.921 <10.68 <11.16 <5.89 <6.655 <32.58 <11.13 MW-157 2/3/2015 <2.395 <2.645 <6.39 <3.485 <5.234 <2.989 <5.49 <13.73 <2.524 <3.024 <29.39 <8.454 MW-157 5/5/2015 <2.219 <2.753 <6.15 <2.69 <4.579 <2.717 <4.723 <13.38 <2.221 <2.6 <24.32 <7.772 MW-157 8/19/2015 <5.872 <6.669 <13.7 <4.588 <13.53 <7.497 <11.32 <9.035 <6.358 <6.975 <28.33 <8.305 MW-157 11/17/2015 <5.659 <6.207 <11.48 <5.107 <15.22 <6.41 <9.103 <9.68 <5.499 <6.878 <22.54 <9.401 MW-158 2/3/2015 <2.363 <2.883 <7.956 <2.894 <5.915 <3.511 <5.837 <10.39 <2.516 <2.297 <27.16 <8.654 MW-158 5/6/2015 <2.033 <2.403 <4.882 <2.157 <4.553 <2.465 <3.614 <9.208 <l.865 <2.077 <17.71 <6.997 MW-158 8/19/2015 <7.388 <8.742 <16.63 <9.702 . <16.89 <9.066 <15.25 <14.66 <7.711 <8.628 <45.78 <8.572 MW-158 12/1/2015 <3.443 <3.907 <7.97 <3.578 <7.638 <4.189 <7.398 <14.22 <3.886 <3.572 <28.98 <8.224 MW-159 2/3/2015 <3.126 <2.911 <6.401 <3.344 <6.047 <2.779 <5.706 <12.47 <2.812 <3.479 <29.07 <7.429

River Bend Station 2014 Regulatory Guide 1.21 Page 67 of72 MW-159 5/6/2015 <2.103 <2.473 <5.363 <2.414 <5.31 <2.581 <4.316 <10.47 <2.065 <2.271 <20.93 <8.246 MW-159-DUP 5/6/2015 <2.94 <3.136 <7.55 <2.963 <6.618 <3.407 <5.533 <13.05 <2.804 <2.933 <26.63 <9.356 MW-159 8/19/2015 <7.015 <6.49 <10.84 <9.185 <14.33 <8 <14.09 <13.05 <8.128 <7.235 <35.02 <11.33 MW-159-DUP 8/19/2015 <6.385 <6.033 <13.52 <5.743 <12.26 <7.337 <11.6 <12.41 <5.671 <7.122 <36.21 <6.236 MW-159 12/1/2015 <2.348 <2.412 <5.167 <2.291 <5.123 <2.893 <4.364 <14.09 <2.057 <2.435 <21.46 <7.672 MW-16 12/3/2015 <1.115 <l.327 <3.153 <l.234 <2.292 <1.502 <2.369 <10.98 <1.154 <l.269 <14.83 <4.482 MW-161 2/3/2015 <2.789 <3.688 <8.708 <2.864 <7.426 <3.71 <6.759 <11.6 <2.586 <2.899 <32.72 <6.697 MW-161-DUP 2/3/2015 <l.97 <3.131 <5.851 <3.453 <6.888 <2.693 <5.265 <12.05 <2.716 <2.991 <26.29 <6.375 MW-161 5/6/2015 <2.907 <3.128 <6.566 <3.156 <6.644 <3.271 <5.414 <7.67 <2.84 <2.949 <18.9 <6.542 MW-161-DUP 5/6/2015 <.8937 <.9682 <2.052 <.9843 <2.016 <l.079 <l.689 <2.881 <.9392 <.9714 <6.611 <1.853 MW-161 8/19/2015 <5.706 <5.459 <12.56 <6.329 <9.791 <5.612 <11.84 <14.09 <4.829 <6.233 <29.67 <13.94 MW-161 11/18/2015 <8.521 <9.315 <16.79 <7.802 <17.14 <8.133 <13.82 <13.5 <7.886 <9.572 <40.56 <14.05 MW-162 2/3/2015 <2.637 <l.765 <5.772 <2.774 <4.916 <3.117 <4.082 <11.33 <2.113 <2.987 <25.71 <7.399 MW-162-DUP 2/3/2015 <2.053 <2.365 <4.272 <l.999 <4.879 <2.432 <3.722 <10.37 <2.083 <1.86 <19.87 <5.985 MW-162 5/6/2015 <2.57 <2.795 <6.034 <2.365 <4.852 <3.01 <5.007 <13.63 <2.498 <2.677 <25.44 <7.023 MW-162 8/19/2015 <6.301 <5.889 <11.79 <5.669 <13.21 <6.251 <10.5 <9.472 <7.232 <7.05 <29.16 <10.04 MW-162 12/1/2015 <2.791 <3.025 <6.368 <3.159 <5.018 <3.245 <5.648 <14.99 <2.688 <3.289 <26.64 <8.46 MW-167 11/17/2015 <6.167 <5.468 <11.37 <5.436 <10.2 <5.466 <8.836 <9.488 <5.189 <5.811 <24.19 <9.162 MW-167-DUP 11/1,7/2015 <4.636 <5.911 <15.24 <4.412 <9.049 <6.919 <7.712 <12.15 <5.071 <8.344 <26.11 <8.564 MW-169 11/17/2015 <7.668 <6.486 <15.65 <7.458 <13.33 <7.06 <13.36 <11.88 <6.655 <7.329 <31.7 <7.227 MW-17 11/19/2015 <3.911 <4.647 <9.892 <3.983 <7.223 <5.037 <8.382 <12.1. <4.682 <4.163 <27.1 <11.36 MW-170 11/18/2015 <3.774 <3.904 <8.859 <3.833 <6.824 <4.273 <7.131 <13.17 <4.438 <4.09 <27.57 <7.603 MW-172 11/18/2015 <4.135 <5.109 <10.41 <2.924 <9.543 <4.162 <8.103 <11.99 <4.076 <4.569 <23.27 <10.07 MW-174 11/18/2015 <4.209 <5.358 <11.35 <4.253 <9.384 <4.972 <9.095 <14.47 <4.713 <5.107 <33.5 <11.59 MW-18 11/19/2015 <5.989 <7.752 <16.32 <6.343 <11.98 <7.379 <12.72 <11.51 <8.284 <6.128 <28.85 <6.862 MW-180 11/18/2015 <5.952 <6.03 <12.4 <5.439 <13.94 <6.557 <10.04 <11.91 <7.516 <6.795 <30.55 <8.476 MW-182 11/19/2015 <8.198 <8.37 <19.03 <6.635 <13.49 <9.199 <14.9 <13.17 <8.522 <8.249 <38.02 <9.575 MW-182-DUP 11/19/2015 <6.348 <8.111 <12.76 <6.739 <16.69 <6.945 <11.84 <11.38 <5.817 <6.153 <24.46 <12.55 MW-185 11/17/2015 <6.494 <4.351 <10.62 <5.794 <11.87 <5.217 <8.342 <10.74 <5.183 <6.183 <20.59 <5.718 MW-188 11/18/2015 <3.458 <4.028 <8.569 <3.455 <7.034 <5.097 <7.834 <14.22 <3.713 <4.385 <32.66 <7.095

River Bend Station 2014 Regulatory Guide 1.21 Page 68 of72 MW-19 11/19/2015 <4.76 <4.204 <11.05 <4.737 <9.08 <4.949 <8.161 <14.58 <4.25 <4.732 <32.48 <10.49 MW-20 12/2/2015 <l.431 <l.64 <3.878 <1.375 <2.786 <1.766 <2.883 <14.6 <l.356 <1.419 <20.81 <5.819 MW-21 12/3/2015 <l.782 <1.85 <5.089 <1.841 <3.598 <2.182 <3.551 <9.471 <1.662 <1.87 <16.8 <6.285 PZ-01 2/2/2015 <1.723 <2.423 <5.32 <2.063 <3.795 <2.243 <3.804 <9.887 <l.442 <2.35 <13.36 <3.245 PZ-01 5/5/2015 <2.574 <2.767 <6.18 <2.385 <5.116 <3.175 <4.968 <13.7 <2.396 <2.595 <25.15 <8.391 PZ-01 8/18/2015 <6.517 <6.149 <9.159 <7.798 <12.12 <4.868 <10.82 <10.82 <6.2 <5.457 <27.9 <9.64 PZ-01 11/17/2015 <8.028 <8.096 <17.49 <6.614 <13.22 <8.151 <13.13 <12.54 <8.788 <8.367 <40.11 <12.9 PZ-02 5/5/2015 <1.667 <l.769 <3.995 <l.686 <3.194 <1.931 <3.105 <5.792 <1.478 <l.71 <11.95 <3.767 PZ-02 11/18/2015 <5.869 <4.866 <10.63 <6.295 <10.51 <6.705 <10.94 <10.96 <6.061 <5.497 <23.9 <7.461 PZ-03 2/3/2015 <2.45 <2.851 <6.955 <2.372 <6.423 <2.694 <4.672 <10.95 <2.394 <2.826 <18.96 <8.551 PZ-03 5/6/2015 <2.182 <2.3 <5.154 <2.133 . <4.175 <2.454 <4.051 <9.58 <2.018 <2.209 <19.85 <6.345 PZ-03 8/19/2015 <3.535 <3.366 <8.176 <3.565 <7.537 . <3.537 <6.06 <9.718 <3.136 <3.469 <21.7 <6.854 PZ-03 11/18/2015 <5.057 <5.084 <10.1 <5.699 <9.952 <6.737 <9.36 <14.7 <4.845 <5.38 <40.72 <11.35 SW-101 5/7/2015 <4.186 <4.894 <10.08 <3.895 <8.64 <5.046 <8.059 <13.83 <3.72 <3.56 <30.63 <8.878 SW-101 8/19/2015 <5.627 <5.435 <13.5 <5.469 <9.455 <6.051 <10.05 <14.16 <5.16 <5.001 <30.12 <10.11 SW-101 12/3/2015 <.9454 <1.274 <3.1 <l.083 <2.25 <l.253 <2.322 <8.619 <l.057 <1.152 <14.39 <4.733 SW-102 5/7/2015 <3.509 <3.634 <8.506 <4.349 <7.713 <4.12 <6.909 <13.65 <3.093 <3.612 <26.65 <8.088 SW-102 8/19/2015 <3.446 <3.713 <7.412 <3.424 <6.959 <3.561 <6.065 <6.561 <3.316 <3.81 <17.25 <5.827 SW-102 11/19/2015 <8.2 <8.164 <14.7 <8.681 <17.84 <8.262 <15.06 <14.38 <5.444 <9.585 <41.27 <12.43 SW-103 2/4/2015 <1.95 <3.469 <7.503 <2.706 <6.549 <2.632 <4.856 <13.38 <2.379 <2.948 <24.1 <6.564 SW-103 5/7/2015 <3.393 <3.799 <6.938 <3.216 <6.666 <3.826 <6.428 <11.31 <3.246 <3.397 <25.91 <6.87 SW-103 8/19/2015 <3.52 <4.093 <6.38 <4.794 <6.882 <4.465 <6.731 <11.74 <3.814 <4.139 <27.73 <6.126 SW-103 11/19/2015 <8.775 <9.575 <20.78 <12.27 <17.66 <12.6 <14.42 <14.66 <9.012 <11.03 <51.02 <13.14 SW-104 5/7/2015 <4.281 <4.41 <10.58 <3.887 <8.597 <4.322 <7.359 <11.69 <3.676 <4.02 <28.3 <9.777 SW-104 8/19/2015 <4.865 <4.242 <10.59 <5.762 <9.691 <4.849 <11.18 <14.85 <4.053 <5.924 <33.4 <11.48 SW-104 11/19/2015 <5.505 <5.437 <13.53 <5.134 <11.78 <5.663 <9.743 <14.6 <4.948 <5.262 <36.1 <11.95 T-14 11/19/2015 <5.055 <5.461 <7.183 <6.289 <10.26 <6.163 <11.07 <8.144 <6.138 <6.223 <26.96 <7.953

River Bend Station 2014 Regulatory Guide 1.21 Page 69 of72 Attachment 1 - 2013 Table 3 Revised

River Bend Station 2014 Regulatory Guide 1.21 Page70 of72 In the 2013 Annual Radioactive Effluent Release Report, page 34of71, Table 3, Section 3, it states that 16 solid waste shipments were made to the Energy Solutions (Bear Creek) facility in Oak Ridge, TN. During a recent review of solid waste shipments, it was discovered that in 2013 there were actually 23 solid waste shipments made to the Energy Solutions (Bear Creek) facility in Oak Ridge, TN. The following pages have the revised Table 3 (Solid Waste and Irradiated Fuel Shipments) for the 2013 Annual Radioactive Effluent Release Report.

River Bend Station 2014 Regulatory Guide 1.21 Page71 of72 REVISED - 2013 - TABLE 3 - REVISED Effluent and Waste Disposal Annual Report 2013 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/13 to 12/31/13 A. Solid Waste Shipped for Burial or Disposal {Not Irradiated Fu~l)

1. Type of Waste Units 12 Month Period Waste Class Estimated Error %

Spent Resins, Filter m3 5.22E+Ol A +/- 25%

Sludges, Evaporator Ci 5.55E+Ol A Bottoms, Etc. m3 O*. OOE+OO B I

Ci O.OOE+OO B m3 O.OOE+OO c Ci O.OOE+OO c Dry Compressible Wastes, m3 5.82E+02 A +/- 25%

Contaminated Equipment Ci 6.38E-01 *A Etc.

Irradiated Components, m3 O.OOE+OO Control Rods, Etc. Ci O.OOE+OO Other m3 2.30E+02 A +/- 25%

{Water, EHC, Waste Oil, Ci l.86E-02 A etc.)

Note: Volume considered being the total disposal volume of the container.

Radwaste Estimated Error %:

Waste types considered are processed solid waste (i.e. resin, filter media) and non-compactible/compactible dry active waste.

1. Possible Errors

a. Volume

b. Representative Sampling

c. Instrument/Counting

d. Dose to Curie Calculations

2. Volume Error Level indication for processed resins can be determined to +/- 0.5 inches. This correlates to approximately 1. 0%. Container manufacturer stated design tolerance allows for 1. 0%

deviation from container dimensions. Volume error is not applicable to dry active waste.

3. Representative Sampling Error Sampling error for processed resins is based upon obtaining a representative sample from the. waste being processed using an iso-lock sampler. Sampling error from dry active waste is based upon. obtaining a representative sample from the material being packaged. This error is estimated to be +/-*10% for all waste types, which is consistent with industry standards.

River Bend Station 2014 Regulatory Guide 1.21 Page72 of72 REVISED - Effluent and Waste Disposal Annual Report 2013 Year - REVISED Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/13 to 12/31/13 Table 3 (continued)

4. Instrument/Counting Error The error caused by sample geometry, counting time, sample activity and instrument background is estimated to be +/- 10%. The error for radiological survey instrumentation is estimated to be +/- 20%. This error is applicable to all waste types.

5. Dose to Curie Calculations Error The Dose to Curie method used to calculate activity suffers from analytical accuracy in that certain important parameters are neglected. These parameters are geometry of packag.e, measuring instrument characteristics, build-up, internal attenuation effect, and external media attenuation. An activity correction factor is applied to provide adjustment for these factors. This error is applicable to all waste types.

2. Estimates of Major Nuclides by Waste Stream Resins, Filters, Evaporator Dry Compressible Wastes, Other Bottoms, Etc. Contaminated Equipment, Etc. Water, EHC, Waste Oil, Etc.

(Min 1%) (Min 1%) (Min 1%)

Isotope % Abundance Curies Isotope % Abundance Curies Isotope % Abundance Curies MN-54 3.080 1. 71E+OO MN-54 1. 738 l. llE-02 Cr-51 1.380 2.56E-04 FE-55 6.335 3.51E+OO FE-55 54.947 3.51E-01 MN-54 2 .113 3.92E-04 C0-60 63.813 3.54E+Ol co-:60 33.290 2.13E-01 FE-55 48.234 8.95E-03 Ni-63 4.565 2.53E+00 ZR-95 1. 700 l.09E-02 C0-60 33.587 6.23E-03 ZN-65 16.809 9.33E+00 NB-95 2.560 l.63E-02 ZR-95 3.109 5.77E-04 CS-137 4.159 2. 31E+OO CS-137 1.968 1. 26E-02 NB-95 5.123 9. 51E-04 CS-137 1. 721 3.19E-04 Determined by Measurement & Correlation.

Packaged in Strong, Tight Liners.

No Solidification Agent or Absorbent Used.

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 9 Truck Energy Solutions (Gallaher) - Oak Ridge, TN 23 Truck Energy Solutions (Bear Creek) - Oak Ridge, TN 5 Truck Energy Solutions (Barnwell) - Barnwell, SC B. Irradiated Fuel Shipments Disposition No Irradiated Components, Control Rods, Etc. were shipped in 2013 .

Number of Shipments Mode of Transportation Destination 0 N/A N/A

Entergy Operations, Inc:

River Bend Station 5485 U.S. Highway 61 N

'- St. Francisville, LA 70775 Tel 225-378-3305 Kristi Huffstatler Acting Manager-Regulatory Assurance May 2, 2016 U.S. Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852-2738 RBG-47682 RBF1-16-0056

Subject:

Annual Radioactive Effluent Release Report River Bend Station -:. Unit 1 License No. NPF-47 Docket No. 50-458

Dear Sir or Madam,

. Enclosed is the River Bend Station (RBS) Annual Radioactive Effluent Release Report for 2015 for the period January 1, 2015 through December 31, 2015. This report is submitted in accordance with the RBS Technical Specifications, Section 5.6.2.

Should.you have any questions regarding the enclosed, please contact Kristi Huffstatler, at (225) 378-3305.

Sincerely,

~~~~

KRH/tjb enclosure

Annual Radioactive. Effluent Release Report RBG-47682 i Page 2 of 2 cc: U.S. Nuclear Regul~tory Commission Region IV 1600 E. Lamar Blvd.

Arlington, TX 76011-4511 NRC Resident Inspector (w/o)

PO Box 1050 St. Francisville, LA 70775 Records Clerk (w/o)

Public Utility Commission of Texas 1701 N. Congress Ave.

Austin Texas 78711-13326 Mr. Stephen S. Koenick, Project Manager (w/o)

U.S. Nuclear Regulatory Commission MS 8 B1A .

One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738

River Bend Station 2015 Annual Radiological Effluent Relcuse Report Pagel of72 RIVER BEND STATION 2015 ANNUAL RADIOLOGICAL EFFLUENT RELEASE REPORT REVIEWEDBY: w/L~.V--

William~pell I Senior HP/Chem Specialist ruiVIEWED BY~(Jl?alld

. f

~ .

Shannon C. Peterkin I Radiation Protection Manager L( ~ $0-/ 6 APPROVED BY:---'"'----=-->.:;:--~~~===:::::::-~~~~~~~

River Bend Station 2015 Annual Radiologis_al Effluent Release Report Page 2 of72 Table of Contents I. SUPPLEMENTAL INFORMATION..**.......** ;******..***********.****.*.............*.*.........*..****.****.* 4 II. GASEOUS EFFLUENT

SUMMARY

INFORMATION ............................................... 12 ID. LIQUID EFFLUENT

SUMMARY

INFORMATION.................................................... 12 IV. SOLID WASTE ................................................................ ,...*..*....*...***.**...*....*..***.**.*****. 12 V. RADIOLOGICAL IMPACT ON MAN (40CFR190) ..................................................... 12 VI. METEOROLOGICAL DATA. ......................................................................,******..*.****** 13 VII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY .............................................................................................................. 14 VIII. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY .............................................................................................................. 14 IX. LIQUID HOLD UP T ANKS ........................................................................................... 14 X. RADIOLOGICAL ENVIRONMENTAL MONITORING **.. ;....................................... 14 XI. LAND USE CENSUS ....................................,.................................................................. 14 XII. OFFSITE DOSE CALCULATION MANUAL (ODCM)*.*****.*..****........*.,...................... 14 XIII. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS .............................................................................................. 15 XIV. PROCESS CONTROL PROGRAM (PCP) .................................................................... 16 XV. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI)- FINAL GUIDANCE DOCUMENT (NEI 07-07) OBJECTIVE ANNUAL REPORTING ......... 17 TABLElA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES ................................ 19 TABLElB GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE ............. 20 TABLElC GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE ......................... 21 TABLElD GASEOUS EFFLUENTS - MIXED MODE RELEASES- CONTINUOUS MODE .... 22 TABLElE SUPPLEMENTAL INFORMATION GASEOUS EFFLUENTS - BATCHMODE ..... 23 TABLElF RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM..... 24 TABLElG 2015 GASEOUS ANNUAL DOSE

SUMMARY

REPORT............................................ 25 TABLE2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES .................................... 26 TABLE2B LIQUID EFFLUENTS- CONTINUOUS MODE .......................................................... 27 TABLE2C LIQUID EFFLUENTS-BATCH MODE ...................................................................... 28 TABLE2E RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM ........ 30 TABLE2F LIQUID ANNUAL DOSE

SUMMARY

REPORT ......................................................... 31 TABLE3 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2015 YEAR ................... 32 TABLE4 MEMBERS OF THE PUBLIC ON SITE DOSE ............................................................ 34 TABLES 2015 YEAR METEOROLOGICAL DATA- JOINT FREQUENCY TABLES ............ 36

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 3 of72 TABLE 6 ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DOSE CALCULATIONS ..............................................:........................ 53 TABLE 7 GROUNDWATER MONITORING WELL SAMPLE RESULTS .................................. 54 ATTACHMENT 1-2013 TABLE 3 REVISED ..................................................................................... 69

River Bend Station 2015 Annual Radiological Effluent Release Report Page 4of72 This is the Annual Radioactive Effluent Release Report for the period of January 1, 2015, through December 31, 2015. This report is submitted in accordance with Technical Specification 5.6.3 of Appendix A to River Bend Station (RBS) License Number NPF-47.

A corrected Solid Waste and Irradiated Fuel Shipments table from the 2013 Annual Radioactive Effluent Release Report is included in Attachment 1.

I. SUPPLEMENTAL INFORMATION A Regulatory Limits

1. 10CFR50, Appendix I Limits a) Fission and Activation Gases In accordance with Technical Requirement (TR) 3.11.2.2, the air dose due to noble gases released in gaseous effluent to areas at and beyond the SITE BOUNDARY shall be limited to:

Daamma-Air = gamma air dose from radioactive noble gases in millirad (mrad) n 3.17E-8 L Mi(X/Q) Qi .::; 5 mrads/qtr i= 1 .::; 10 mrads/yr DBeta-Air =beta air dose from radioactive noble gases in millirad (mrad) n (

3. l 7E-8 L Ni (X/Q) Qi .::; 10 mrads/qtr i= 1 .::; 20 mrads/yr b) Radioiodines (I-131 & I-133) and Particulate In accordance with Technical Requirement 3.11.2.3, the dose -to a Iv1EMBER OF THE PUBLIC from tadioiodines (I-131 and I-133), tritium (H-3) and all radionuclides in particulate form with half-lives greater than 8 days, in gaseous effluent releases to areas at and beyond the SITE BOUNDARY shall be limited to:

D1&sDPi: = Pose in mrem to the organ (i') for the age group of interest from radioiodine (I-131, I-133, tritium, and 8 day particulate via the

River Bend StatiJi; 2015 Annual Radiological Effluent Release Report Page 5 of72 pathway of interest.)

n 3.17E-08 (Fo) L i=l n

3.17E-08 (F~) L RT (D/Q) Qi and i=l n

DT L Dr&sDPT * :S 7 .5 mrem/qtr z=l : : .; 15 mrem/yr (above terms defined in the RBS ODCM) c) Liquid Effluent In accordance with Technical Requirement 3.11.1.2, the dose or dose commitment to a MEMBER OF THE PUBLIC from radioactive materials in liquid effluent released to UNRESTRICTED AREAS shall be limited to:

Aii~

(DF) Dw DrnrALT =Total dose commitment to the organ ('t) due to all releases during the desired time interval in mrem and DrnrAL Total Body < 1.5 mrem/qtr

< 3 mrem/yr DrorAL AiiyOrgan -< 5 mrem/qtr

< 10 mrem/yr (above terms defined in RBS ODCM)

River Bend Station 2015 Annual Radiological Effluent Release Report Page 6 of72

- 2. 40CFR190 Limits In accordance with Technical Requirement 3.11.4, the annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to:

< 25 mrem to the total body or any ~rgan (except the thyroid)

< 75 mrem to the thyroid

3. Miscellaneous Limits

a. Technical Requirement 3.11.2.l - Fission and. Activation Gases In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioactive materials released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be less than or equal to 500 millirems/year (mrem/yr) to the total body and less than or equat to 3000 mrem/yr to the skin:

DRTB= Dose rate to the total body in mrem/yr n

L Ki (X/Q) Qi :::; 500 mrem/yr and i=l DRsKIN= Dose rate to the skin in mrem/yr n

L Li+ l.lMi (X/Q) Qi :::; 3000 mrem/yr i=l (above terms defined in RBS ODCM)

b. Technical Requirement 3.11.2.l - Radioiodine (I-Bl & 1-133) and Particulate In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioiodines, tritium, and all radionuclides in particulate form with half-lives greater than 8 days released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be .limited to less than or equal to 1500 mrem/yr to any organ:

River Bend Station 2015 Annual Radiological EffiuentRelease Report Page 7 of72 DR1&sDP't = Dose rate to the organ -r for the age pathway group of interest from Radioiodines (I-131 & I-133), tritium, and 8 day particulate via the inhalation pathway in mrem/yr.

n DR1&8DP't = L Pi (X/Q) Qi ~ 1500 mrem/yr i=l (above terms defined in RBS ODCM)

c. Technical Requirement 3 .11.1.1 - Liguid Effluent In accordance with Technical Requirement 3 .11.1.1, the concentration of radioactive material released in liquid

effluent to UNRESTRICTED AREAS shall be limited to ten times the concentrations specified in 10CFR20, Appendix B, Table 2, 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 microcuries/milliliter total concentration.

d. Technical Requirement 3.11.2.5 - Ventilation Exhaust Treatment In accordance with Technical Requirement 3 .11.2.5, the VENTILATION EXHAUST TREATMENT SYSTEM shall be used to reduce radioactive materials in gaseous waste prior to their discharge when the projected doses, due to gaseous effluent releases to areas and beyond the SITE BOUNDARY would exceed 0.3 mrem to any organ in a 31-dayperiod.

e. Technical Requirement 3.11.1.3 - Liguid Radwaste Treatment System In accordance with Technical Requirement 3.11.1.3, the liquid radwaste treatment system shall be used to reduce the radioactive materials in liquid waste prior to their discharge when the projected doses, due to the liquid effluent, to UNRESTRICTED AREAS would exceed 0.06 mrem to the total body or 0.2 mrem to any organ in a 31-day period.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 86f72 B. Effluent Concentration Limits

1. Gaseous Releases The concentrations of radioactive gaseous releases are based on the dose rate restrictions in RBS Technical Requirements, rather than the Effluent Concentration Limits (ECL) listed in 10CFR20 Appendix B, Table 2, Column 1.

2. Liquid Releases The Effluent Concentration Limits of radioactive materials in liquid effluents are limited to ten times 10CFR20, Appendix B, !able 2, Column 2.

C. Measurements and Approximations of Total Radioactivity

1. Gaseous Effluent

a. Fission and Activation Gases Periodic grab samples are obtained from the Main Plant Exhaust Duct, Fuel Building Exhaust Vent and Radwaste Building Exhaust Vent. These samples are analyzed using high purity germanium detectors coupled to computerized pulse height analyzers. The sampling and analysis frequencies are described in Table IF.

Sampling and analysis of these effluent streams provide noble gas radionuclide relative abundance that can then be applied to the noble gas gross activity and gross activity release rate to obtain nuclide specific activities and release rates. The noble gas gross activity released within a specific time period is determined by integrating the stack monitor release rate over the considered time period. If no activity was detected between the stack grab sample and a significant increase in hourly averages was recorded, the nuclide relative abundance of the last sample (or the last similar event), which indicated the presence ofactivity, was used to obtain nuclide specific activities. Correction factors for the monitors are derived and applied for each sampling period whenever noble gas radionuclides are detected in the effluent stream.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 9of72

b. Particulate and Radioiodine (l-131 & I-133)

Particulates, Iodine-131 and Iodine-133 are continuously sampled from the' three release points using a particulate filter and charcoal cartridge in line with a sample pump (stack monitor pump). These filters and charcoal cartridges are removed and analyzed in accordance with the frequencies specified in Table IF. Analysis is performed to

. identify and quantify radionuclides using high purity germanium detectors coupled to computerized pulse height analyzers. Given the nuclide specific activity concentrations, process flow rate, and duration of the sample, the nuclide specific activity released to the environment can be obtained. Due to the continuous sampling process, it is assumed that

the radioactive material is released to the environment at a .constant rate within the sampling period. Strontium-89 and Strontium-90 (Sr-89 and Sr-90) are quantitatively analyzed

by counting by gas flow proportional counting. Gross alpha analysis is performed using a zmc sulfide scintillation counter.

c. Tritium Tritium grab samples are obtained from the three gaseous

. release points at the specified frequencies listed in Table IF

'using an ice bath condensation collection method. The collected sample is then analyzed using a liquid scintillation counter.. Given the tritium concentration, process flow rate, and time period for which the sample is obtained, the tritium activity released to the environment c~n be determined. Due to the frequency of sampling, it is assumed that the tritium is released to the environment at a constant rate within the time period for which the sample is obtained.

d. Carbon-14 (C-14)

C-14 release details are discussed in Section VI.

e. Nickel-63 No Nickel-63 was quantified in 2015.

River Bend Station 2015 Annual Radiological Effiuent Release Report Page 10 of72

2. Liquid Effluent Representative grab samples are* obtained from the appropriate sample recovery tank and analyzed prior to release of the tank in accordance with the frequencies listed in Table 2E. Analysis for gamma emitting nuclides (including dissolved and entrained noble gases) is performed using a high purity germanium detector coupled to a computerized pulse height analyzer. Tritium concentration is determined using a liquid scintillation counter.

Strontium-89 and Strontium-90 are quantitatively analyzed by scintillation techniques (Cherenkov counting). Iron-55 is counted with a liquid scintillation counter after digestion of the iron. Gross

~lpha analysis is performed using a zinc sulfide scintillation counter. The activity of each nuclide released to the environment is determined from the nuclide specific' concentration and total tank volume released.

D .. Batch Releases

1. Liquid Effluents Batch releases and rece1vmg stream flow from River Bend Station during the reporting period of January 1, 2015, through becember 31, 2015 are shown in Table 2D.

The Mississippi River stream flow is obtained by averaging data from the U. S. Army Corp of Engineers website using flow gauge data at Tarbert Landing.

2. Gaseous Effluents There were no routine batch releases of gaseous effluents from River \

Bend Station during the reporting period of January 1, 2015, through December 31, 2015.

E. Abnormal Releases There were no abnormal releases in 2015.

\

River Bend Station 2015 Annual Radiological Effluent Release Report Page 11 of72 F. Estimate of Total Error

1. Liquid I

The maximum error associated with sample collection, laboratory .

analysis, and discharge volume is collectively estimated to be:

Fission and Activation Products -+ 14.2%

Tritium I

-+ 14.2%

Dissolved and Entrained Noble Gases -+ 14.2%

Gross Alpha Radioactivity -+ 14.2%

2. Gaseous The maximum error (not including sample line loss) associated with sample flow, process flow, sample collection, 'monitor accuracy and laboratory analysis are collectively estimated to be:

Noble Gases +/- 37.0%

Iodines -+ 18.6%

Particulate -+ 18.6%

Tritium -+ 18.2%

3. Determination of Total Error The total error (i.e., collective error due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.) is calculated using the following equation:

where:

ET = total error E 1, E 2 *** En= individual errors due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.

River Bend Station 2015 Annual Radiological Eftluent Release Report Page 12 of72 II. GASEOUS EFFLUENT

SUMMARY

INFORMATION Refer to the Table 1 series for the summation of gaseous releases. It should be noted that an entry of "O.OOE+OO" Curie (Ci) or microcurie/second (uCi/sec) in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table IF. Also, any nuclide not appearing in the tables was< LLD for all four quarters.

ill. LIQUID EFFLUENT

SUMMARY

INFORMATION Refer to the Table 2 series for the summation ofliquid releases. It should be noted that an entry of "O.OOE+OO" Ci or uCi/ml in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table 2E. Also, any nuclide not appearing in the tables was< LLD for all four quarters.

IV. SOLID WASTE Refer to Table 3, for Solid Waste and Irradiated Fuel Shipments.

V. RADIOLOGICAL IMPACT ON MAN (40CFR190)

An assessment (see summary below) was made of radiation doses to the likely most-exposed member of the public from River Bend and other nearby uranium fuel cycle sources (none within five miles). The annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to less than or equal to 25 mrem to the total body or any organ, except the thyroid, which shall be limited to less than or equal to 75 mrem.

Carbon-14 (C-14)

The bounding annual dose from C-14 was calculated using guidance from Regulatory Guide 1.21, Revision 2, NUREG-0016, and the methodology in Regulatory Guide 1.109. The C-14 source term of 11 curies was taken from the site calculation PR(C)-359-3A, Gaseous Releases per NUREG-0016 Revision 1.

Carbon-14 does not have dose factors associated with standing on contaminated

\ ground; therefore, no ground plane dose was calculated. There is no milk pathway within five miles of River Bend Station so this pathway is not evaluated. RBS does not take credit for decay in the X/Q. This calculation assumes the inhalation, meat and vegetation pathways are at the site boundary in the sector with the highest X/Q.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 13 of72 The dose from liquid effluents is not calculated as the dose contribution from C-14 is considered to be insignificant as indicated in Regulatory Guide 1.21, Revision 2.

According to EPRI 1021106, Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents, 95% of the carbon released is in the form of carbon dioxide and this contributes the highest dose to man. The ingestion pathway, specifically vegetation, is the most likely route of intake for man. An assumption has been made for gaseous releases that plants obtain all of their C-14 from carbon dioxide.

Dose not including C-14:

Organ mrem Total Body 4.53E-01 Thyroid 6.53E-01 Other Organ 4.53E-01 Skin 6.53E-01 Bounding Dose from C-14 only:

Organ mrem Total Body 9.39E-01 Skin O.OOE+OO Thyroid 9.39E-01 Other Organ (bone) 4.70E+OO In addition, an assessment of doses was made for members of the public due to their activities inside the site boundary can be found in Table 4. The maximally exposed member of the public was an employee staying at RBS during the week and is conservatively calculated to have stayed at least four days per week for 34 weeks. It should be noted that liquid effluent pathway dose was not considered since these individuals would not engage in activities that would allow exposure to this pathway.

VI. METEOROLOGICAL DATA See Tables 5 and 6 for the cumulative joint frequency distributions and annual average data for continuous releases. The meteorological recovery for 2015 was 91.4%.

Rivet Bend Station 2015 Annual Radiological Eftlueut Release Report Page 14 of72 VII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.2-1 ofTechnical Requirement 3.3.11.2 were, if inoperable at anytime in the period January 1, 2015, through December 31, 2015, restored to operable status within the required time.

VIII. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.3-1 ofTechnical Requirement 3.3.11.3 were, if inoperable at anytime in the period January 1, 2015, through December 31, 2015, restored to operable status within the required time.

\

IX. LIQUID HOLD UP TANKS The maximum quantity of radioactive material; excluding tritium and dissolved or entrained noble gases, contained in any unprotected outdoor tank puring the period of January 1, 2015, through December 31, 2015 was less than or equal to the 10 curie limit as required by Technical Specification 5.5.8.b. '

X. RADIOLOGICAL ENVIRONMENTAL MONITORING There were no changes to the Radiological Environmental Monitoring Program during the reporting period January 1, 2015, through December 31, 2015.

XI. LAND USE CENSUS No land use census was. performed in 20.15.

XII. OFFSITE DOSE CALCULATION MANUAL (ODCM)

There were no changes to the ODCM in 2015.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 15 of72 XIII. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS Engineering has performed a review of the Asset Suite database to evaluat~ non-administrative design changes completed or partially completed during 2bl 5 involving the subject systems (i.e. changes classified as evaluations or nuclear changes). These design changes were then reviewed to determine if there have been any major changes to the subject systems. The review was based on a major

'change being defined as a modification which affected the method of processing or the effluent from the system. *Also, to be a "major change" the change must have

affected the Updated Safety Analysis Report (USAR).

The Engineering Changes (~C's) to liquid, so lid or gaseous radwaste systems implemented during this time period were:

EC-45515 TMOD Rev. 1 - A revision was created to EC-45515 as it expired on 4/15/15. This TMOD provides the needed information to cross-connect the Reactor Plant Component Cooling Water (RPCCW) system to the Liquid Radioactive Waste (LWS) system. TMOD EC-45515 Rev. 0 was documented in the 2013 Engineering Annual Effluent Report input and determined that this change does not constitute a major change to either the liquid, soi.id, or gaseous radwaste treatment systems. This TMOD has been removed and the EC closed on 7/6/15.

EC-58746 Rev. 0 - This design change replaces* an obimlete analog temperature .

indicating controller (TIC) N64-TICR032A with a digital controller. The TIC is designed to provide control of the temperature of the Offgas Dryer regeneration process from 0 to 500°F.

EC-57673 TMOD Rev. 0 - This TMOD allowed the temporary disconnecting of heating elements in OFG-H2A, Off-gas Building Dryer .Heater that were causing ground faults. This mod was installed on 5/21/lS and removed on 7/1/15.

EC-58382 EVAL Rev. 0 - This EC provides an "Accept As-Is" determination of fan be~ing tolerances based upon the short term period that the degraded OFG-FN3A will remain in service until scheduled replacement with a new blower skid per EC-58276. ,

No EC was identified as* being completed during this time 'period that modified any radioactive waste* system major component such that the processing method or effluent was changed. Also no c4anges were identified affecting the method of processing solid, liquid or gaseous waste or the isotopic composition or the quantity of liquid, solid, or gaseous waste as described in the USAR.

/ '

In conclusion, no design changes were completed during the specified time period that constituted a major change to either the liquid, solid or gaseous radwaste treatment systems.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 16 of72 XIV. PROCESS CONTROL PROGRAM (PCP)

Changes to the Process Control Program (PCP) and supporting procedures in 2015 are summarized below:

EN-RW-105, Process Control Program", Revision 5:

The primary purpose of this revision is to clarify waste ownership in Step 5.l[l](b) and added a new step 5.9[2] (same as step 5. l[l](b)).

Other changes included removing references to Vermont Yankee from the procedure because fleet procedures no longer apply to Vermont Yankee, reformatted table and updated the cross references in Section 8 for compliance with the procedure writer's manual (EN-AD-101-01).

EN-RW-102, "Radioactive Shipping Procedure", Revision 12:

This revision is to add reference to 10 CPR 37 and IER 11-i. Reword Step 5.1.2 for clarity, add step 5.1.3 regarding additional lead time for category 1 and 2 materials. Add step 5.2 for interface with EN-RW-106 updated section 8.0 to reflect insertion of new step and subsequent renumbering of steps. *Edited attachments for clarity and statements about special nuclear material and finally removed VY from coversheet EN-RW-102, "Radioactive Shipping Procedure", Revision 13:

The primary purpose of this revision is to improve the process regarding the notification of Reactor Engineering of non-waste shipments containing special nuclear material. In Attachments 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, and 9.9, the reference to NRC Form 540/541 was replaced with "the manifest." Also updated various site specific commitments (Section 8) as follows:

Updated information provided by the GGNS Commitment Review

Added missing document numbers for W3 and RBS

Added commitment number for GGNS entry in section 8 regarding GNRI-92/00195

Deleted W3 commitment P-11757 from section 8 per V(3 Commitment Review response EN-RW-104, "Scaling Factors", Revision 11:

Revised step 5.2[2](a) 2nd bullet adding a W3 waste stream sampling method.

River Bend Station 2015 Annual Radiological Effluent Release Report Page 17 of72 EN-RW-104, "Scaling Factors, Revision 12:

This revision was an editorial revision to remove reference to a specific version number of RADMAN software and instead reference the current RADMAN software version. In addition, references to Vermont Yankee were removed from the coversheet EN-RW-106, Integrated Transportation Security Plan", Revision 4:

The changes in EN-RW-106 involves administrative changes that deletes an old attachment ,and creates three additional attachments for each type of category of shipment class (Class 1 2 and 3) and subsequent steps changed to reflect the new

.attachments. The change also added responsibility for the training manager to ensure proper development and implementation for the key elements of hazardous materiaJ and 10CFR37.43(c) requirements. EN-RW-106 does not impact the program described in the Nuclear Security safeguards information, as defined in 10CFR37. A Iiew step requiring an annual review of transportation security plans for carriers 'under contract was added. Two steps in the responsibilities section were deleted to clarify that Plant Security was not responsible for transportation security.

XV. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI) -FINAL GUIDANCE DOCUMENT (NEI 07-07) OBJECTIVE ANNUAL REPORTING Ground water samples were taken in support of the GPI. These samples are not part of the Radiological Environmental Monitoring Program. The sample results for 2015 are located in Table 7.

River Bend Station made one NEI 07-07 voluntary notification in August 2015, which is included here per NEI 07-07 Objective 2.4.c. This notification was made based on a spill inside the Turbine Building with the potential to reach groundwater. A valving error caused an estimated spill of 60,000 gallons inside the Turbine Building on the 67-foot elevation. Some floor joints in the Turbine Building are thought to be deteriorated to a point where some liquid could seep through to the soil and subsequently to the groundwater. If any water seeped through these joints our geologist estimates that due to decay, dilution and dispersion the activity present is not likely to be detected in the Mississippi River if it were to infiltrate to the Upland Terrace Aquifer and migrate offsite.

The potential offsite impact was reviewed. The Upland Terrace Aquifer is the closest aquifer beneath the site. The Upland Terrace Aquifer is hydrologically

River Bend Station 2015 Annual Radiological Effluent Release Report Page 18 of72 connected to the Mississippi River Alluvial aquifer, and then to the Mississippi River, approximately two miles west of the facility. The site conceptual hydrology model indicates a down-gradient flow generally to the southwest from the Turbine Building to the Mississippi River is entirely on River Bend Station property. River Bend Station site does not utilize ground water for drinking water use, and the nearest known drinking water user from the Mississippi River is many miles downstream below Baton Rouge, Louisiana. The most recent information River Bend Station has is all neighbors surrounding the station use the parish water supply for their primary ~ource of drinking water. Intakes in the Mississippi River for the parish water supply are not downgradient of River Bend Station. Due to the significant dilution volume of the Mississippi River, there would not be any meaningful dose impact offsite.

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River Bend Station 2015 Annual Radiological Effluent Release Report Page 19 of72

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TABLE lA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2015 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 2.91E+Ol 4.67E+02 3 .16E+02 2.79E+Ol 8.40E+02

2. Avg. Release Rate uCi/sec 3.75E+OO 5.94E+Ol 3.97E+Ol 3.SlE+OO 2.66E+Ol

3. % Applicable Limit % (1) l.24E-01 5.94E+OO 2.64E+OO 3.lSE+OO 4.51E+OO Iodine-131

1. Total Release Ci 7.13E-04 8. 60E-05 4.57E-04 8.30E-04 2.09E-03

2. Avg. Release Rate uCi/sec 9.17E-05 1. 09E-05 5.75E-05 1. 04E-04 6.62E-05

3. % Applicable Limit % (2) 3.04E-01

3. 66E-02 l.97E-01 3.73E-01 4.56E-01 Particulates Half Life >= 8 days