RBG-47359, Annual Radioactive Effluent Release Report for 2012

Annual Radioactive Effluent Release Report for 2012

ML13127A032
Person / Time
Site:	River Bend
Issue date:	05/01/2013
From:	Clark J Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RBF1-13-0060, RBG-47359
Download: ML13127A032 (93)

Text

Entergy Operations, Inc.

River Bend Station

!Ent 5485 U.S. Highway 61N St. Francisville, LA 70775 Tel 225-381-4177 Joseph A. Clark Manager-Licensing May 1, 2013 U.S. Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852-2738

Subject:

Annual Radioactive Effluent Release Report for 2012 River Bend Station - Unit 1 License No. NPF-47 Docket No. 50-458 RBG-47359 RBFI-13-0060

Dear Sir or Madam,

Enclosed is the River Bend Station (RBS) Annual Radioactive Effluent Release Report for the period January 1, 2012, through December 31, 2012. This report is submitted in accordance with the RBS Technical Specifications, Section 5.6.3.

Should you have any questions regarding the enclosed information, please contact Mr.

Joseph Clark at (225) 381-4177.

Sincerely, JAC/wjf enclosure

Annual Radioactive Effluent Release Report for 2012 RBG-47359 Page 2 of 2 cc: U.S. Nuclear Regulatory Commission Region IV 1600 E. Lamar Blvd.

Arlington, TX 76011-4511 NRC Resident Inspector PO Box 1050 St. Francisville, LA 70775 Records Clerk Public Utility Commission of Texas 1701 N. Congress Ave.

Austin, TX 78711-3326 Mr. Alan Wang, Project Manager U.S. Nuclear Regulatory Commission MS 0-8B1 11555 Rockville Pike Rockville, MD 20852-2738

River Bend Station 2012 Regulatory Guide 1.21 Page I of 91 2012 ANNUAL EFFLUENT RELEASE REPORT PREPARED BY: 4//g-.//

William H. Spell / Senior HP/Chem Specialist REVIEWED BY: H z / er - C Kenneth S. Hallaran / Manager - Chemistry REVIEWED BY: N R o e-ctio Managr3 Eric C. Neal / Radiation Protection Manager APPROVED BY:

Richard E. Gakbois / General Manager Plant Operations

River Bend Station 2012 Regulatory Guide 1.21 Page 2 of 91 TABLE OF CONTENTS

1. INTRO DUCTIO N ................................................................................................................................................... 5 II. SUPPLEMENTAL INFORMATION .................................................................................................................... 5 III. GASEOUS EFFLUENT

SUMMARY

INFORMATION .............................................................................. 14 IV. LIQUID EFFLUENT

SUMMARY

INFORMATION ................................................................................... 14 V. SO LID W A STE ..................................................................................................................................................... 14 VI. RADIOLOGICAL IMPACT ON MAN (40CFRI90) ..................................................................................... 14 VII. METEOROLOGICAL DATA .............................................................................................................................. 15 VIII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY ...... 15 IX. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY ......... 16 X. LIQUID HOLD UP TANKS .................................................................................................................................. 16 XI. RADIOLOGICAL ENVIRONMENTAL MONITORING ............................................................................ 16 XIIL.LAND USE CENSUS ............................................................................................................................................ 16 XIII. OFFSITE DOSE CALCULATION MANUAL (ODCM) ............................................................................ 17 XIV. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SY ST EM S ........................................................................................................................................................................ 17 XV. PROCESS CONTROL PROGRAM (PCP) .................................................................................................... 18 XVI. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI) - FINAL GUIDANCE DOCUMENT (NEI 07-07) OBJECTIVE ANNUAL REPORTING ................................................................................................ 18

River Bend Station 2012 Regulatory Guide 1.21 Page 3 of 91 TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES ................................................... 20 TABLE IB GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE ................................ 21 TABLE 1C GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE ............................................. 23 TABLE ID GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE ........................ 24 TABLE IE SUPPLEMENTAL INFORMATION ................................................................................................... 26 TABLE IF RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM ....................... 27 TABLE IG GASEOUS ANNUAL DOSE

SUMMARY

REPORT .......................................................................... 28 TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES ....................................................... 29 TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE .............................................................................. 30 TABLE 2C LIQUID EFFLUENTS - BATCH MODE ............................................................................................ 31 TABLE 2DEFFLUENT AND WASTE DISPOSAL REPORT-SUPPLEMENTAL INFORMATION-LIQUID EFFLUENTS - BATCH M ODE ..................................................................................................................................... 32 TABLE 2E RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM ........................... 33 TABLE 2F LIQUID ANNUAL DOSE

SUMMARY

REPORT .............................................................................. 34 TABLE 3 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2012 YEAR .................... 35 TABLE 4 DOSES TO A MEMBER OF THE PUBLIC INSIDE SITE BOUNDARY ASSUM PTIONS/PARA M ETERS ................................................................................................................................. 37 TABLE 5 DOSES TO MEMBERS OF THE PUBLIC ON SITE ......................................................................... 38 TABLE 6 2012 YEAR METEOROLOGICAL DATA - JOINT FREQUENCY TABLES ................................. 39

River Bend Station 2012 Regulatory Guide 1.21 Page 4 of 91 TABLE 7 ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DO SE CALCULATIO NS ............................................................................................................................................... 56 TABLE 8 GROUNDWATER MONITORING WELL SAMPLE RESULTS ..................................................... 57

River Bend Station 2012 Regulatory Guide 1.21 Page 5 of 91 I. INTRODUCTION This is the annual Radioactive Effluent Release Report for the period of January 1, 2012, through December 31, 2012. This report is submitted in accordance with Technical Specification 5.6.3 of Appendix A to River Bend Station (RBS) License Number NPF-47.

II. 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:

DGamma-Air = gamma air dose from radioactive noble gases in millirad (mrad) n

= 3.17E-8 I Mi (X/0) Qi < 5 mrads/qtr i=1 < 10 mrads/yr DBeta-Air = beta air dose from radioactive noble gases in millirad '(mrad) n

= 3.17E-8 I Ni (X/Q) Qi < 10 mrads/qtr i=l < 20 mrads/yr b) Radioiodines (1-131 & 1-133) and Particulate In accordance with Technical Requirement 3.11.2.3, the dose to a MEMBER OF THE PUBLIC from radioiodines" (1-131 and 1-133), 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:

Di&8DPt = Dose in mrem to the organ (t) for the age group of interest from radioiodine (1-131, 1-133, tritium, and 8 day particulate via the pathway

River Bend Station 2012 Regulatory Guide 1.21 Page 6 of 91 of interest.)

n

= 3.17E-08 (Fo) I Pi (X/Q) Qi and i=1 n

= 3.17E-08 (Fo) X Ri-, (D/Q) Qi and i=1 n

D,* = X DI&8DPT < 7.5 mrem/qtr z=1  : 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:

Di = Ai At__ .

(DF) Dw and n

DTOTALT = 2: DiT i=1 DTOTAL-r = Total dose commitment to the organ (-r) due to all releases during the desired time interval in mrem and DTOTAL Total Body < 1.5 mrem/qtr

< 3 mrem/yr DTOTAL Any Organ < 5 mrem/qtr

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

River Bend Station 2012 Regulatory Guide 1.21 Page 7 of 91

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 organ (except the thyroid)

_< 75 mrem to the thyroid

3. Miscellaneous Limits

a. Technical Requirement 3.11.2.1 - 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 equal to 3000 mrem/yr to the skin:

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

Z Ki (X/0) Qi < 500 mrem/yr and i=1 DRsKJN= Dose rate to the skin in mrem/yr n

= 2 LI + 1.1Mi (X/Q) Qi < 3000 mrem/yr i=1 (above terms defined in RBS ODCM)

b. Technical Requirement 3.11.2.1 - Radioiodine (1-131 & 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:

DRI&8DPt = Dose rate to the organ -r for the age pathway group of interest from Radioiodines (1-131 & 1-133), tritium, and 8 day particulate via the inhalation pathway in mrem/yr.

River Bend Station 2012 Regulatory Guide 1.21 Page 8 of 91 n _

DRI&8DPt = I Pi (X/Q) Qi < 1500 mrem/yr i=l (above terms defined in RBS ODCM)

c. Technical Requirement 3.11.1.1 - Liquid 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.OE-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-day period.

e. Technical Requirement 3.11.1.3 - Liquid 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.

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.

River Bend Station 2012 Regulatory Guide 1.21 Page 9 of 91

2. Liquid Releases The Effluent Concentration Limits of radioactive materials in liquid effluents are limited to ten times 10CFR20, Appendix B, Table 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 1F.

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 of activity, 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.

b. Particulate and Radioiodine (1-131 & 1-133)

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)

River Bend Station 2012 Regulatory Guide 1.21 Page 10 of 91 are quantitatively analyzed by counting by gas flow proportional counting. Gross alpha analysis is performed using a zinc 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 can 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 In the third quarter 2012, Nickel-63 was quantified in the Fuel Building composite stack samples.

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 alpha 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.

River Bend Station 2012 Regulatory Guide 1.21 Page I11of 91 D. Batch Releases

1. Liquid Effluents Batch releases and receiving stream flow from River Bend Station during the reporting period of January 1, 2012, through December 31, 2012 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, 2012, through December 31, 2012.

E. Abnormal Releases There were no gaseous abnormal releases in 2012. A liquid abnormal release is suspected to have occurred in 2012.

On October 7, 2012, water was found leaking continuously from the ground and accumulating in a ditch on the south side of the plant near the Waste Water Treatment Plant (WWTP). Initial investigation believed that the source of the leak was domestic water. This was based on a pH sample, known buried piping in the area, and the fact that the waste water treatment plant pumps run intermittently. The leak was estimated to be about 5-gallons per minute.

Refueling Outage 17 started on February 16, 2013. Plant personnel noticed that the water leak had stopped, and later during the outage determined that no maintenance on the leak had been performed. A pump test of the WWTP effluent pumps was performed which revealed that the leaking line was actually the 4-inch greywater effluent line from the WWTP and not the domestic water line. The greywater effluent line takes treated wastewater (Outfall 201) from the WWTP to the Circulating Water System (CWS) blowdown line. The CWS blowdown line goes through permitted Outfall 001 to the Mississippi River. Both the greywater effluent line and the Circulating Water System (CWS) blowdown were secured to support plant maintenance activities on February 17, 2013. The flow stopped when the CWS blowdown line was secured for Refueling Outage 17.

The subsequent investigation determined that the reason for the constant flow at the leak location was due to a stuck open check valve (1PBS-V3014) and failed air-relief valve in the greywater discharge line. Check valve 1PBS-V3014 is designed to prevent backflow from the CWS blowdown line into the greywater effluent line. Check valve 1PBS-V3014 had a piece of wood stuck in it preventing the valve from seating correctly. As a

River Bend Station R2012 Regulatory Guide 1.21 Page 12 of 91 result, water from the CWS blowdown line backflowed into the 4-inch greywater effluent line from the WWTP and emerged from a below ground air-relief valve. The water that flowed out of the greywater effluent line appears to have stayed onsite in the plant ditch system and soaked into the ground. There was no evidence of flow to the surface waters (creeks) that would have gone offsite.

Liquid Radwaste System (LWS) discharges flow into the CWS blowdown line and this connection is upstream of the WWTP tie-in. Therefore, during periods of LWS discharging, some of the diluted radioactive water (containing tritium (H-3), cobalt-60 (Co-60) and some noble gases would have been able to leak onto the ground. A mud sample from beneath the ground surface in the leak area was obtained on March 17, 2013. The sample was counted wet with no specific soil geometry and showed detectable levels of Co-60 (2.4E-08 uCi/gm) (no water was available to perform tritium analysis). This indicated the possibility of CWS water backflowing through the pipe.

The activity of the LWS releases for the time period was reviewed. The dose to the public is negligible from this event. Even with extremely conservative assumptions, the maximum dose calculated is a small percentage of the 10CFR50 liquid effluent dose objectives.

River Bend Station has a groundwater monitoring program and has wells down gradient of the greywater piping leak location. The site conceptual hydrology model indicates a down-gradient flow generally to the southwest from the greywater piping leak to the Mississippi River. Currently a plan is being developed to remediate the contaminated soil around the leak path. In addition, any potential infiltration will be monitored by the RBS groundwater monitoring program. Contract geologists are reviewing this situation to determine if additional monitoring wells are required.

The River Bend Station site does not utilize ground water for drinking water use, and the nearest known drinking water user is many miles downstream in the Mississippi River below Baton Rouge, Louisiana. Due to the significant dilution volume of the Mississippi River, it is highly unlikely that any radioactivity that may enter the groundwater from the greywater piping leak will have any meaningful impact offsite.

Private wells south of the River Bend Station property line are not expected to be affected by this situation. The most recent information indicates all neighbors surrounding the station use the parish water supply for their primary source of drinking water. In addition, the direction of groundwater flow is not towards these wells.

River Bend Station made notifications in accordance with NEI 07-07. While the confirmation of this event occurred in 2013, it is being reported in this report since the leak began in 2012. Since any activity released would have been part of a permitted LWS batch release, the curies released are properly reported in the Table 2 series.

River Bend Station 2012 Regulatory Guide 1.21 Page 13 of 91 F. Estimate of Total Error

1. Liquid The maximum error associated with sample collection, laboratory analysis, and discharge volume is collectively estimated to be:

Fission and Activation Products: + 14.2%

Tritium: + 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%

lodines  : + 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:

ET = V((E1)L + (E 2)L +...(En) where:

ET = total error El, E2 ...En = individual errors due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.

River Bend Station 2012 Regulatory Guide 1.21 Page 14 of 91 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+00" 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 1F. Also, any nuclide not appearing in the tables was < LLD for all four quarters.

IV. LIQUID EFFLUENT

SUMMARY

INFORMATION Refer to the Table 2 series for the summation of liquid releases. It should be noted that an entry of "O.OOE+00" 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.

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

VI. 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. 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

River Bend Station d2012 Regulatory Guide 1.21 Page 15 of 91 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 5.33E-02 Skin 5.05E-02 Thyroid 9.69E-02 Other Organ 5.34E-02 Bounding Dose from C-14 only:

Organ mrem Total Body 9.39E-01 Skin O.OOE+00 Thyroid 9.39E-01 Other Organ 4.70E+00 (Bone)

In addition, an assessment of doses was made for members of the public due to their activities inside the site boundary. Parameters and assumptions used to make this determination can be found in Table 4. The results of the calculations can be found in Table

5. 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 50 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.

VII. METEOROLOGICAL DATA See Tables 6 and 7 for the cumulative joint frequency distributions and annual average data for continuous releases. The meteorological recovery for 2012 was 98 %.

VIII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11,2-1 of Technical Requirement 3.3.11.2 were, if inoperable at any time in the period

River Bend Station 2012 Regulatory Guide 1.21 Page 16 of 91 January 1, 2012, through December 31, 2012, restored to operable status within the required time. Reporting of inoperable channels is therefore not required in this report. During year 2012 there were no required entries for either TLCO 3.3.11.2 or TLCO 3.3.11.3 Action E.2.

RMS-RE107 was listed under LCO 1-TS-12-RMS-RE107 INOP-107 from May 2, 2012, until May 20, 2012, due to a tagout for installation of an above ground temporary Liquid Radwaste System discharge line. At the request of Radwaste management, RMS-RE107 bypass switch was tagged in bypass to allow for opening LWS-AOV257 for system draining. There was no problem with RMS-RE107 and Action E was not entered, even though the LCO was longer than 14 days. The LCO was for tracking purposes only. There was no discharge because the line was being worked on by EC-35300.

IX. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.3-1 of Technical Requirement 3.3.11.3 were, if inoperable at any time in the period January 1, 2012, through December 31, 2012, restored to operable status within the required time, Reporting of inoperable channels is therefore not required in this report.

X. LIQUID HOLD UP TANKS The maximum quantity of radioactive material, excluding tritium and dissolved or entrained noble gases, contained in any unprotected outdoor tank during the period of January 1, 2012, through December 31, 2012 was less than or equal to the 10 curie limit as required by Technical Specification 5.5.8.b.

XI. RADIOLOGICAL ENVIRONMENTAL MONITORING There were no changes to the Radiological Environmental Monitoring Program during the reporting period January 1, 2012, through December 31, 2012.

XII. LAND USE CENSUS The Land Use Census for 2012 was conducted in accordance with procedure ESP-8-051, as required by Technical Requirements Manual (TRM) (TR 3.12.2).

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

The milk animal census identified no milk animals within 8 km (5 miles) of River Bend site.

River Bend Station 2012 Regulatory Guide 1.21 Page 17 of 91 This information was verified by the County Agents from West Feliciana, East Feliciana and Pointe Coupee parishes.

No locations were identified in 2012 that would yield a calculated dose or dose commitment greater than those currently calculated in Requirement TSR 3.11.2.3.1.

The County Agents also confirmed that there was no commercial harvesting of crawfish within the five-mile radius downstream of RBS. This is data is collected to further support the possibility of removing invertebrates from the liquid dose conversion factors. This information represents several land use census periods that show crawfish consumption from the waters immediately affected by RBS does not occur. RBS conservatively uses the invertebrate pathway although not required by NUREG-0133 liquid dose factor methodology for fresh water nuclear power plants.

An evaluation of ground water usage down gradient of River Bend Station was conducted during this Land Use Census period. It verified that no residents down gradient of RBS utilize ground water as a significant source of drinking water, and confirms there is no drinking water pathway between River Bend Station and the Mississippi River.

XIII. OFFSITE DOSE CALCULATION MANUAL (ODCM)

There were no changes to the ODCM in 2012.

XIV. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS Engineering has performed a review of the Asset Suite database to evaluate non-administrative design changes completed or partially completed during 2012 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 USAR.

The Engineering Changes (EC's) to liquid, solid or gaseous radwaste systems implemented during this time period were:

• EC 41790 Enclosure to provide equivalent pressure boundary protection for damaged section of pipe LWS-004-586.

• EC 40118 Revised the temperature setpoint for the Offgas Recombiner temperature controllers shown on the setpoint data sheet to match operating procedure.

• EC 35300 Rev. 0 T-Mod for Temporary Blowdown line

River Bend Station 2012 Regulatory Guide 1.21 Page 18 of 91

" EC 37021 T-Mod ECN for Temporary Blowdown to revise the described location for tie-in point.

• EC 37092 T-Mod ECN for Temporary Blowdown line to provide instructions to facilitate installation.

• EC 37615 T-Mod ECN for Temporary Blowdown line to provide additional test criteria.

• EC 38729 T-Mod for a temporary program change to temperature recorder N64-TRSR602 to accommodate failure of another recorder. This T-Mod has been removed.

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 changes 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.

XV. PROCESS CONTROL PROGRAM (PCP)

There were no revisions to the PCP (EN-RW-105) in 2012.

XVI. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI) - FINAL GUIDANCE DOCUMENT (NEI 07-07) OBJECTIVE ANNUAL REPORTING Ground water samples for gamma radiation and tritium were taken in support of the GPI.

These samples are not part of the Radiological Environmental Monitoring Program. The sample results for 2012 are located in Table 8.

River Bend Station made one notification in accordance with NEI 07-07 for the leak described in the Abnormal Release section of this report. While the confirmation of this event and actual notification occurred in 2013, it is being included in this report since the leak began in 2012. Since any activity released would have been part of a permitted LWS batch release, the curies released are properly reported in Table 2.

The wells with positive activity in Table 8 are associated with the notification made in December 2011. All of the remaining samples taken in support of the GPI meet the Lower Limit of Detection indicated in the Technical Requirement 3.12.1 (Environmental LLDs) except for some gamma samples in the third quarter 2012. The failure to meet the required LLDs was due to equipment availability and laboratory capacity. The samples affected by this are denoted by an asterisk (*) in Table 8. The radiological ground water monitoring

River Bend Station 2012 Regulatory Guide 1.21 Page 19 of 91 program is separate and distinct from the Radiological Environmental Monitoring Program (REMP). The short lived gamma isotopes have not been identified in previous samples and these isotopes are not expected to be a dose contributor to the public due to their short half-life.

River Bend Station 2012 Regulatory Guide 1.21 Page 20 of 91 TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 9. 06E+00 1.98E+01 3.30E+00 2.26E+00 3.44E+01

2. Avg. Release Rate uCi/sec 1. 15E+00 2.52E+00 4.16E-01 2.85E-01 1. 09E+00

3.  % Applicable Limit  % (1) 2.57E-01 2.02E-01 8.19E-02 1.06E-01 3.23E-01 Iodine-131

1. Total Release Ci 2.22E-04 2. 80E-04 2. 82E-04 3.47E-04 1. 13E-03

2. Avg. Release Rate uCi/sec 2.83E-05 3. 57E-05 3.54E-05 4.36E-05 3.58E-05

3.  % Applicable Limit  % (2) 9.42E-02 1. 19E-01 1.21E-01 1.47E-01 2.41E-01 Particulates Half Life >= 8 days

1. Total Release Ci 5. 10E-04 1.91E-04 1. 10E-04 4.27E-05 8.54E-04

2. Avg. Release Rate uCi/sec 6.48E-05 2.43E-05 1. 38E-05 5.37E-06 2 .70E-05

3.  % Applicable Limit  % (2) 2. 11E-02 1.99E-02 2.84E-02 3 . 50E-02 5.25E-02 Tritium

1. Total Release Ci 3.86E+00 3. 83E+00 3. 33E+00 3.90E+00 1.49E+01

2. Avg. Release Rate uCi/sec 4. 90E-01 4. 87E-01 4.18E-01 4.91E-01 4.72E-01

3.  % Applicable Limit  % (2) 8.34E-02 7.03E-02 6.91E-02 7. 92E-02 1.51E-01 Carbon-14

1. Total Release Ci 2.73E+00 2.73E+00 2.77E+00 2.77E+00 1. 10E+01

2. Avg. Release Rate uCi/sec 3.50E-01 3.49E-01 3.48E-01 3 .48E-01 3.49E-01

3.  % Applicable Limit  % (2) 1.56E+01 1.56E+01 1.58E+01 1.58E+01 3.13E+01

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), which ever 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 2012 Regulatory Guide 1.21 Page 21 of 91 TABLE 1B GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases XE-133 Ci 0. 00E+00 0. OOE+00 0. OOE+00 0 .OOE+00 0.OOE+00 XE-133M Ci 0. OOE+00 0. OOE+00 0. OOE+00 0 .OOE+00 0. OOE+00 XE-135 Ci 1. 13E+00 5.82E-01 9. 12E-01 4. 87E-01 3. 11E+00 XE-135M Ci 1.81E+00 1.02E+00 2.43E-01 8. 51E-01 3.92E+00 Totals for Period... Ci 2.94E+00 1.60E+00 1.16E+00 1.34E+00 7.03E+00 Iodines 1-131 Ci 0.OOE+00 0. OOE+00 1.07E-06 0. OOE+00 1.07E-06 1-133 Ci 0.OOE+00 0. OOE+00 0. OOE+00 3.29E-06 3.29E-06 Totals for Period... Ci 0.OOE+00 0.OOE+00 1.07E-06 3.29E-06 4.36E-06 Particulates Half Life 8 days CE-141 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 CO-57 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0.OOE+00 CO-58 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0.OOE+00 CO-60 Ci 0.OOE+00 0.OOE+00 0.OOE+00 5.90E-07 5.90E-07 CR-51 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 CS-137 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 FE-59 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 MN-54 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0.OOE+00 NB-95 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 NI-63 Ci 1.35E-08 0.OOE+00 4.56E-06 6.81E-08 4.65E-06 RU-103 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 RU-106 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 SR-89 Ci 0.OOE+00 6.OOE-07 1.60E-08 0. OOE+00 6.16E-07 ZN-65 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00

River Bend Station 2012 Regulatory Guide 1.21 Page 22 of 91 Totals for Period... Ci 1.35E-08 6.OOE-07 4.58E-06 6.58E-07 5.86E-06 Tritium H-3 Ci 1.03E+00 8.19E-01 8.37E-01 9.58E-01 3.64E+00

Rivet Bend Station 2012 Regulatory Guide 1.21 Page 23 of 91 TABLE IC GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases XE-133 Ci 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 XE-135 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0.OOE+00 XE-135M Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Totals for Period... Ci 0. OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 Iodines 1-131 Ci 0. OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0.OOE+00 1-133 Ci 0. OOE+00 0. 00E+00 0.OOE+00 0. OOE+00 0. OOE+00 Totals for Period... Ci 0. OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Particulates Half Life 8 days BA-140 Ci 0. OOE+00 0 OOE+00 0.OOE+00 0. OOE+00 0 OOE+00 CO-60 Ci 0. OOE+00 0 OOE+00 0. OOE+00 0. OOE+00 0 OOE+00 MN-54 Ci 0. OOE+00 0 OOE+00 0. OOE+00 0.OOE+00 0 OOE+00 SR-89 Ci 0. OOE+00 0 OOE+00 0. OOE+00 0.OOE+00 0 OOE+00 SR-90 Ci 0.OOE+00 0 OOE+00 0. OOE+00 0. OOE+00 0 OOE+00 ZN-65 Ci 0.OOE+00 0 OOE+00 0.OOE+00 0. OOE+00 0 OOE+00 Totals for Period... Ci 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Tritium H-3 Ci 0. OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Totals for Period... Ci 0. OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00

River Bend Station 2012 Regulatory Guide 1.21 Page 24 of 91 TABLE ID GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases AR-41 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 KR-85 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 KR-85M Ci 1.80E-01 0.OOE+00 0.OOE+00 2.84E-01 4.64E-01 KR-87 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 KR-88 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 XE-131M Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 XE-133 Ci 6.13E-02 2.64E+00 0.0OE+00 0.OOE+00 2.70E+00 XE-133M Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 XE-135 Ci 1.63E+00 1.02E+01 5.74E-01 3.39E-01 1.27E+01 XE-135M Ci 4.24E+00 5.39E+00 1.57E+00 3.02E-01 1.15E+01 XE-137 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 XE-138 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 Totals for Period... Ci 6.11E+00 1.82E+01 2.14E+00 9.25E-01 2.74E+01 Iodines 1-131 Ci 2.22E-04 2.80E-04 2.81E-04 3.47E-04 1.13E-03 1-133 Ci 1.82E-03 1.71E-03 2.46E-03 2.98E-03 8.96E-03 Totals for Period... Ci 2.04E-03 1.99E-03 2.74E-03 3.33E-03 1.01E-02 Particulates Half Life >= 8 days BA-140 Ci 2.62E-04 1.03E-04 5.84E-05 2.50E-06 4.26E-04 CE-139 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 CE-141 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 CO-58 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 CO-60 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 CR-51 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 CS-134 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00

River Bend Station 2012 Regulatory Guide 1.21 Page 25 of 91 CS-137 Ci O.OOE+00 O.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 FE-59 Ci O.OOE+00 O.OOE+00 O.OOE+00 0.OOE+00 0.OOE+00 MN-54 Ci O.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 RU-103 Ci O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 0.OOE+00 SR-89 Ci 2.47E-04 8.83E-05 4.70E-05 3.96E-05 4.22E-04 SR-90 Ci O.OOE+00 0.OOE+00 O.OOE+00 0.OOE+00 0.OOE+00 ZN-65 Ci O.OOE+00 O.OOE+00 O.OOE+00 0.OOE+00 0.OOE+00 Totals for Period... Ci 5.09E-04 1.91E-04 1.05E-04 4.21E-05 8.48E-04 Tritium H-3 Ci 2.82E+00 3.01E+00 2.49E+00 2.94E+00 1.13E+01 Carbon-14 C-14 Ci 2.73E+00 2.73E+00 2.77E+00 2.77E+00 1.10E+01

River Bend Station 2012 Regulatory Guide 1.21 Page 26 of 91 TABLE 1E SUPPLEMENTAL INFORMATION GASEOUS EFFLUENTS - BATCH MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 0 0 0 0 Total release time minutes 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Maximum release time minutes 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0.OOE+00 Average release time minutes 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Minimum release time minutes 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00

River Bend Station 2012 Regulatory Guide 1.21 Page' 27 of 91 TABLE IF 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 1.OOE-04 H-3 1.OOE-06 B. Fuel Building M M Principal Gamma Ventilation Grab Sample Emitters 1.OOE-04 Exhaust Duct H-3 1.OOE-06 C. Radwaste M M Principal Gamma Building Grab Sample Emitters 1.OOE-04 Ventilation Exhaust Duct D. All Release Continuous W 1-131 1.OOE-12 Types as listed Charcoal in A, B, & C Sample above 1-133 1.OOE-10 Continuous W Principal Gamma Particulate Emitters (1-131, 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 2012 Regulatory Guide 1.21 Page 1-8 of 91 TABLE IG GASEOUS ANNUAL DOSE

SUMMARY

REPORT I&P DOSE LIMIT ANALYSIS Age Dose Limit Max % of Period-Limit Group Organ (mrem) (mrem) Limit Q1 - T.Spec Any Organ CHILD THYROID 1.49E-02 7.50E+00 1.99E-01 Q2 - T.Spec Any Organ CHILD THYROID 1.57E-02 7.50E+00 2.10E-01 Q3 - T.Spec Any Organ CHILD THYROID 1.64E-02 7.50E+00 '2.18E-01 Q4 - T.Spec Any Organ CHILD THYROID 1.96E-02 7.50E+00 2.62E-01 Yr - T.Spec Any Organ CHILD THYROID 6.67E-02 1.50E+01 4.45E-01 Carbon-14 (Bounding calculation)

Q1 - T.Spec Any Organ CHILD BONE 1.17E+00 7.50E+00 1.56E+01 Q2 - T.Spec Any Organ CHILD BONE 1.17E+00 7.50E+00 1.56E+01 Q3 - T.Spec Any Organ CHILD BONE 1.18E+00 7.50E+00 1.58E+01 Q4 - T.Spec Any Organ CHILD BONE 1.18E+00 7.50E+00 1.58E+01 Yr - T.Spec Any Organ CHILD BONE 4.70E+00 1.50E+01 3.13E+01 NG DOSE LIMIT ANALYSIS Dose Limit  % of Period-Limit (mrad) (mrad) Limit Qi - T.Spec Gamma 1.29E-02 5.OOE+00 2.57E-01 Q1 - T.Spec Beta 6.29E-03 1.OOE+01 6.29E-02 Q2 - T.Spec Gamma 1.01E-02 5.OOE+00 2.02E-01 Q2 - T.Spec Beta 6.25E-03 1.0OE+01 6.25E-02 Q3 - T.Spec Gamma 4.10E-03 5.OOE+00 8.19E-02 Q3 - T.Spec Beta 3.51E-03 1.OOE+01 3.51E-02 Q4 - T.Spec Gamma 5.28E-03 5.OOE+00 1.06E-01 Q4 - T.Spec Beta 2.61E-03 1.OOE+01 2.61E-02 Yr - T.Spec Gamma 3.23E-02 1.OOE+01 3.23E-01 Yr - T.Spec Beta 1.87E-02 2.OOE+01 9.33E-02

River Bend Station 2012 Regulatory Guide 1.21Pg Page 29 of 91 TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Products

1. Total Release Ci 0. OOE+00 4.91E-05 1. 12E-05 1.71E-06 6.20E-05

2. Avg. Diluted Conc. uCi/ml 0. OOE+00 3.84E-11 8.62E-12 1.26E-12 1. 15E-11

3.  % Applicable Limit  % (1) 0. OOE+00 9.34E-04 3.46E-04 1.76E-05 4. 47E-04 Tritium

1. Total Release Ci 0. OOE+00 1.26E+01 1. 88E+O1 7.44E+00 3.89E+01

2. Avg. Diluted Conc. uCi/ml 0. OOE+00 9.81E-06 1.45E-05 5.47E-06 7.23E-06

3.  % Applicable Limit  % (1) 0. OOE+00 2. 39E-02 5.66E-02 7.26E-03 2. 77E-02 Dissolved and Entrained Gases

1. Total Release Ci 0. OOE+00 4. OOE-03 6.87E-03 2.71E-03 1.36E-02

2. Avg. Diluted Conc. uCi/ml 0. OOE+00 3. 11E-09 5.28E-09 1.99E-09 2.53E-09

3.  % Applicable Limit % (2) 0. OOE+00 1.56E-03 2.64E-03 9.96E-04 1.27E-03 Gross Alpha Radioactivity

1. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 O.OOE+00 Volume of liquid waste liters 0.OOE+00 1.54E+06 2.47E+06 8.30E+05 4.84E+06 Volume of dil. water liters 1.43E+09 1.28E+09 1.30E+09 1.36E+09 5.37E+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.OOE-04 uCi/ml for dissolved and entrained noble gases in liquid effluent.

River Bend Station 2012 Regulatory Guide 1.21 Page 30 of 91 TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

• • No Nuclide Activities

• Tritium

• • No Nuclide Activities **

Dissolved and Entrained Gases

• • No Nuclide Activities Gross Alpha Radioactivity

• • No Nuclide Activities **

River Bend Station 2012 Regulatory Guide 1.21 Page 31 of 91 TABLE 2C LIQUID EFFLUENTS - BATCH MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases CO-60 Ci 0. 00E+00 4. 91E-05 1. 12E-05 1.71E-06 6. 20E-05 Totals for Period... Ci 0. OE+00 4.91E-05 1. 12E-05 1.71E-06 6. 20E-05 Tritium H-3 Ci 0. OOE+00 1. 26E+01 1. 88E+01 7. 44E+00 3. 83E+01 Totals for Period... Ci 0. 00E+00 1. 26E+01 1.88E+01 7.44E+00 3. 83E+01 Dissolved and Entrained Gases XE-133 Ci 0. 00E+00 1. 82E-03 2 .87E-03 9. 65E-04 5. 64E-03 XE-133M Ci 0. 00E+00 8. 04E-06 3. 64E-05 0. 00E+00 4.45E-05 XE-135 Ci 0.OOE+00 2. 15E-03 3. 96E-03 1.75E-03 7 . 85E-03 Totals for Period... Ci 0. 00E+00 4 .01E-03 6. 87E-03 2 .72E-03 1. 36E-02 Gross Alpha Radioactivity

• • No Nuclide Activities **

River Bend Station 2012 Regulatory Guide 1.21 Page 32 of 91 TABLE 2D EFFLUENT AND WASTE DISPOSAL REPORT SUPPLEMENTAL INFORMATION LIQUID EFFLUENTS - BATCH MODE REPORT FOR 2012 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 28 45 15 87 Total release time minutes 0. 00E+00 7. 56E+03 1.26E+04 4.26E+03 2.44E+04 Maximum release time minutes 0. OOE+00 3. 45E+02 3.24E+02 3. 16E+02 3.4 5E+02 Average release time minutes 0. OOE+00 2 .80E+02 2.79E+02 2. 84E+02 2 .80E+02 Minimum release time minutes 0. 00E+00 2.18E+02 2. 39E+02 2 . 53E+02 2. 18E+02 QTR 1 QTR 2 QTR 3 QTR 4 3

Average Mississippi ft /sec 649,912 398,934 162,067 192,989 River stream flow during periods of release of effluent into a flowing stream

River Bend Station 2012 Regulatory Guide 1.21P Page 33 of 91 TABLE 2E RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM Liquid Release Sampling Minimum Type of Activity Lower Limit Type Frequency Analysis Analysis of Detection Frequency (LLD) uCi/ml A. Batch Waste P P Principal Gamma 5.OOE-07 Release (Liquid Each Batch Each Batch Emitters: except Radwaste for Ce-144 5.OOE-06 Recovery Sample Tanks) 1-131 1.OOE-06 P M Dissolved and One Batch/M Entrained Gases 1.OOE-05 (Gamma Emitters)

P M H-3 1.OOE-05 Each Batch Composite Gross Alpha 1.OOE-07 P Q Sr-89, Sr-90 5.OOE-08 Each Batch Composite Fe-55 1.OOE-06 P = Prior to each radioactive release M = At least once per 31 days 0 = At least once per 92 days

River Bend Station 2012 Regulatory Guide 1.21 Page 34 of 91 Table 2F LIQUID ANNUAL DOSE

SUMMARY

REPORT Report for: 2012 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 0.OOE+00 5.OOE+00 0.OOE+00 Qtr 1 - T.Spec Total Body ADULT TBODY 0.OOE+00 1.50E+00 0.OOE+00 Qtr 2 - T.Spec Any Organ ADULT GILLI 4.06E-04 5.OOE+00 8.12E-03 Qtr 2 - T.Spec Total Body ADULT TBODY 3.64E-04 1.50E+00 2.43E-02 Qtr 3 - T.Spec Any Organ ADULT GILLI 8.65E-04 5.OOE+00 1.73E-02 Qtr 3 - T.Spec Total Body ADULT TBODY 8.50E-04 1.50E+00 5.67E-02 Qtr 4 - T.Spec Any Organ ADULT GILLI 1.10E-04 5.OOE+00 2.19E-03 Qtr 4 - T.Spec Total Body ADULT TBODY 1.09E-04 1.50E+00 7.26E-03 2012 - T.Spec Any Organ ADULT GILLI 8.77E-04 1.OOE+01 8.77E-03 2012 - T.Spec Total Body ADULT TBODY 8.37E-04 3.OOE+00 2.79E-02

River Bend Station 2012 Regulatory Guide 1.21 Page 35 of 91 TABLE 3 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2012 YEAR SOLID WASTE AND IRRADIATED FUEL SHIPMENTS Reporting Period from 01/01/12 to 12/31/12 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. 32E+01 A 25%

Sludges, Evaporator Ci 4. 50E+01 A Bottoms, Etc. m3 0. OE+00 B Ci 0. 00E+00 B m3 5. 38E+00 C Ci 2. 14E+03 C Dry Compressible Wastes, m3 1.95E+02 A +/- 25%

Contaminated Equipment Ci 3.17E-01 A Etc.

Irradiated Components, m3 0.00E+00 Control Rods, Etc. Ci. 0.O0E+00 Other m3 7.14E+00 A +/- 25%

(Water, EHC, Waste Oil, Ci 1.07E-01 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

River Bend Station 2012 Regulatory Guide 1.21 Page 36 of 91 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.

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 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 FE-55 82.633 1.80E+03 FE-55 61.668 1.95E-01 FE-55 62.464 6.71E-02 CO-60 9.163 2.OOE+02 CO-60 32.331 1.02E-01 CO-60 31.137 3.34E-02 SR-90 2.735 5.96E+01 CS-137 1.968 6.23E-03 CS-137 2.224 2.39E-03 NI-63 2.708 5.9lE+01 MN-54 1.292 4.09E-03 MN-54 1.155 1.24E-03 ZN-65 1.064 2.32E+01 NI-63 1.035 3.28E-03 NI-63 1.051 1.13E-03 Determined by Measurement & Correlat on.

Packaged in Strong, Tight Liners.

No Solidification Agent or Absorbent Used.

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 13 Truck Energy Solutions (Bear Creek) - Oak Ridge, TN 4 Truck Studsvik Processing Facility (Erwin) - Erwin, TN 3 Truck Energy Solutions, LLC (Clive Disposal Facility -

Containerized) - Clive, UT B. Irradiated Fuel Shipments Disposition No Irradiated Components, Control Rods, Etc. were shipped in 2012 Number of Shipments Mode of Transportation Destination 0 N/A N/A

River Bend Station 2012 Regulatory Guide 1.21 Page 37 of 91 TABLE 4 DOSES TO A MEMBER OF THE PUBLIC INSIDE SITE BOUNDARY ASSUMPTIONS/PARAMETERS MEMBER OF LOCATION DISTANCE(') SECTOR DURATION THE PUBLIC METERS (HR/YEAR)(2)

People Entering Site Without Alligator Bayou 2500 SW 40 Consent National Guard Activity Center 994 WNW 0(3)

Workers staying Activity Center 994 WNW 2400(41 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 to 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 2012.

(4) Workers have been permitted to stay long term at the Activity Center Trailer City beginning April 10, 2007. During refueling outages additional workers were on site for about 60 days. The long term individuals will be the receptors for this pathway.

For 2012, this conservative estimate is based on 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> per day, 4 days per week for 50 weeks, totaling 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br />. 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 2012, these worker's dose is not greater than Trailer City.

River Bend Station 2012 Regulatory Guide 1.21 Page 38 of 91 TABLE 5 DOSES TO MEMBERS OF THE PUBLIC ON SITE FROM GASEOUS RELEASES 2012 Critical Total Skin Dose Annual Organ Body Dose Annual Duration Dose Annual (mrem) Factor Annual (mrem)

(mrem)

Alligator Bayou 2.49E-05 1.30E-05 2.18E-05 4.57E-03 Workers staying 3.04E-03 8.27E-03 1.39E-02 2.92E-02 onsite Deer 3.24E-04 8.83E-04 1.49E-03 2.74E-01 Hunters I I I I

River Bend Station 2012 Regulatory Guide 1.21 Page 39 of 91 TABLE 6 2012 YEAR METEOROLOGICAL DATA - JOINT FREQUENCY TABLES

River Bend Station 2012 Regulatory Guide 1.21 Page 40 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/01/12 0:00 TO 12/31/12 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 109 92 89 147 119 214- 90 2 1 0 0 0 863 NNE 97 57 67 109 113 103 37 8 2 0 0 0 593 NE 72 68 72 110 99 76 13 2 0 0 0 0 512 ENE 71 101 69 76 59 51 6 0 0 0 0 0 433 E 52 90 75 70 41 11 0 0 0 0 0 0 339 ESE 30 83 98 124 78 43 0 0 0 0 0 0 456 SE 16 77 133 271 208 214 27 2 0 0 0 0 948 SSE 24 43 80 185 156 249 126 10 0 0 0 0 873 S 18 27 48 124 124 200 113 10 0 0 0 0 664 SSW 20 28 52 116 83 104 66 1 0 0 0 0 470 SW 17 41 61 66 51 69 12 0 0 0 0 0 317 WSW 17 29 42 48 57 63 9 1 0 0 0 0 266 W 23 39 32 54 65 87 10 0 0 0 0 0 310 WNW 42 55 55 57 53 75 19 1 0 0 0 0 357 NW 59 122 49 70 70 90 68 11 0 0 0 0 539 NNW 63 116 73 92 56 127 83 4 0 0 0 0 614 TOTAL 730 1068 1095 1719 1432 1776 679 52 3 0 0 0 8554 NUMBER OF CALMS: 79 NUMBER OF INVALID HOURS: 151 NUMBER OF VALID HOURS: 8633 TOTAL HOURS FOR THE PERIOD: 8784

River Bend Station 2012 Regulatory Guide 1.21 Page 41 of 91

.RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 1/01/12 0:00 TO 12/31/12 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 1 3 13 1 0 0 0 0 0 18 NNE 0 0 0 1 4 14 7 1 0 0 0 0 27 NE 0 0 0 3 10 23 2 1 0 0 0 0 39 ENE 0 0 0 0 14 15 1 0 0 0 0 0 30 E 0 0 0 1 6 6 0 0 0 0 0 0 13 ESE 0 1 0 3 11 12 0 0 0 0 0 0 27 SE 0 0 0 4 27 58 8 0 0 0 0 0 97 SSE 0 0 0 1 7 24 15 1 0 0 0 0 48 S 0 0 1 0 4 11 13 0 0 0 0 0 29 SSW 0 0 0 0 3 6 4 0 0 0 0 0 13 SW 0 0 0 2 1 3 1 0 0 0 0 0 7 WSW 0 0 0 1 1 3 0 0 0 0 0 0 5 W 0 0 0 1 1 2 1 0 0 0 0 0 5 WNW 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 1 0 3 0 0 0 0 0 4 NNW 0 0 0 0 0 8 3 0 0 0 0 0 11 TOTAL 0 1 1 18 93 198 59 3 0 0 0 0 373 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 373 TOTAL HOURS FOR THE PERIOD: 373

River Bend Station 2012 Regulatory Guide 1.21 Page 42 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 1/01/12 0:00 TO 12/31/12 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 1 0 1 8 10 0 0 0 0 0 20 NNE 0 0 0 1 5 7 1 0 0 0 0 0 14 NE 0 0 1 0 3 2 0 0 0 0 0 0 6 ENE 0 0 0 4 2 1 0 0 0 0 0 0 7 E 0 0 0 3 2 0 0 0 0 0 0 0 5 ESE o 0 0 4 5 2 0 0 0 0 0 0 11 SE o 0 0 3 10 13 1 0 0 0 0 0 27 SSE 0 0 0 2 7 12 7 2 0 0 0 0 30 S 0 0 0 0 2 9 10 1 0 0 0 0 22 SSW 0 0 0 0 3 4 4 0 0 0 0 0 11 SW o 0 0 0 1 4 1 0 0 0 0 0 6 WSW 0 0 0 0 3 4 0 0 0 0 0 0 7 W 0 0 0 1 1 5 0 0 0 0 0 0 7 WNW 0 0 1 0 0 2 1 0 0 0 0 0 4 NW 0 0 0 0 1 3 3 0 0 0 0 0 7 NNW 0 0 0 0 0 4 10 0 0 0 0 0 14 TOTAL 0 0 3 18 46 80 48 3 0 0 0 0 198 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 198 TOTAL HOURS FOR THE PERIOD: 198

River Bend Station 2012 Regulatory Guide 1.21 Page 43 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 1/01/12 0:00 TO 12/31/12 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 3 10 6 0 21 NNE 0 2 13 5 0 20 NE 0 8 7 1 0 18 ENE 0 6 2 0 0 9 E 0 1 0 0 0 4 ESE 0 5 2 0 0 11 SE 0 4 14 1 0 20 SSE 0 10 17 11 0 41 S 0 2 12 12 0 27 SSW 0 1 5 3 0 10 SW 0 1 3 0 0 4 WSW 0 0 5 0 0 6 W 0 1 7 1 0 9 WNW 0 2 4 3 0 9 NW 0 1 6 7 0 14 NNW 0 1 4 8 0 16 TOTAL 0 0 3 16 48 111 58 3 0 0 0 0 239 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 240 TOTAL HOURS FOR THE PERIOD: 240

River Bend Station 2012 Regulatory Guide 1.21 Page 44 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 1/01/12 0:00 TO 12/31/12 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- i76- 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 4 9 35 65 143 72 1 1 0 0 0 331 NNE 0 4 10 41 62 57 19 7 2 0 0 0 202 NE 2 5 17 40 34 28 6 1 0 0 0 0 133 ENE 0 7 9 33 22 16 4 0 0 0 0 0 91 E 2 8 17 35 28 3 0 0 0 0 0 0 93 ESE 2 9 20 44 31 13 0 0 0 0 0 0 119 SE 1 8 18 77 80 71 10 2 0 0 0 0 267 SSE 2 3 14 53 54 119 76 6 0 0 0 0 327 S 1 2 8 27 38 106 64 8 0 0 0 0 254 SSW 1 3 13 26 43 67 47 1 0 0 0 0 201 SW 1 5 14 25 32 48 9 0 0 0 0 0 134 WSW 1 1 8 29 49 47 9 0 0 0 0 0 144 W 0 3 5 35 61 71 7 0 0 0 0 0 182 WNW 0 0 7 30 40 65 13 0 0 0 0 0 155 NW 1 4 10 34 54 69 51 9 0 0 0 0 232 NNW 2 3 4 31 30 93 61 3 0 0 0 0 227 TOTAL 17 69 183 595 723 1016 448 38 3 0. 0 0 3092 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 3095 TOTAL HOURS FOR THE PERIOD: 3095

River Bend Station 2012 Regulatory Guide 1.21 Page 45 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 1/01/12 0:00 TO 12/31/12 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 7 16 26 54 36 40 1 0 0 0 0 0 180 NNE 4 18 22 41 37 12 5 0 0 0 0 0 139 NE 6 16 24 51 33 14 4 0 0 0 0 0 148 ENE 5 12 30 20 12 13 1 0 0 0 0 0 93 E 3 27 28 22 4 2 0 0 0 0 0 0 86 ESE 6 28 36 60 26 14 0 0 0 0 0 0 170 SE 3 29 56 140 84 57 7 0 0 0 0 0 376 SSE 4 15 32 76 72 76 17 0 0 0 0 0 292 S 1 10 25 77 69 60 14 1 0 0 0 0 257 SSW 7 14 33 74 32 21 7 0 0 0 0 0 188 SW 8 17 27 34 16 11 1 0 0 0 0 0 114 WSW 8 14 24 15 4 4 0 1 0 0 0 0 70 w 4 6 17 14 1 2 1 0 0 0 0 0 45 WNW 4 10 20 16 11 4 2 1 0 0 0 0 68 NW 7 19 14 26 12 11 4 2 0 0 0 0 95 NNW 3 12 18 30 21 18 1 0 0 0 0 0 103 TOTAL 80 263 432 750 470 359 65 5 0 0 0 0 2424 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2427 TOTAL HOURS FOR THE PERIOD: 2427

River Bend Station 2012 Regulatory Guide 1.21 Page 46 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 1/01/12 0:00 TO 12/31/12 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 11 6 18 29 8 0 0 0 0 0 0 0 72 NNE 17 8 19 23 3 0 0 0 0 0 0 0 70 NE 11 13 17 11 9 1 0 0 0 0 0 0 62 ENE 18 21 6 10 3 3 0 0 0 0 0 0 61 E 20 28 19 4 0 0 0 0 0 0 0 0 71 ESE 7 36 34 8 0 0 0 0 0 0 0 0 85 SE 5 30 47 44 3 1 0 0 0 0 0 0 130 SSE 8 17 28 49 6 1 0 0 0 0 0 0 109 S 6 11 13 15 8 2 0 0 0 0 0 0 55 SSW 5 8 2 13 1 1 1 0 0 0 0 0 31 SW 4 15 16 4 0 0 0 0 0 0 0 0 39 WSW 6 9 8 1 0 0 0 0 0 0 0 0 24 W 6 14 6 2 0 0 0 0 0 0 0 0 28 WNW 15 11 20 8 0 0 0 0 0 0 0 0 54 NW 12 21 6 7 1 0 0 0 0 0 0 0 47 NNW 11 16 13 17 4 0 0 0 0 0 0 0 61 TOTAL 162 264 272 245 46 9 1 0 0 0 0 0 999 NUMBER OF CALMS: 12 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1011 TOTAL HOURS FOR THE PERIOD: 1011

River Bend Station 2012 Regulatory Guide 1.21 Page 47 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 1/01/12 0:00 TO 12/31/12 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 90 66 34 28 3 0 0 0 0 0 0 0 221 NNE 76 27 16 2 0 0 0 0 0 0 0 0 121 NE 53 34 13 3 2 1 0 0 0 0 0 0 106 ENE 48 61 24 8 0 1 0 0 0 0 0 0 142 E 27 27 11 2 0 0 0 0 0 0 0 0 67 ESE 15 9 8 1 0 0 0 0 0 0 0 0 33 SE 7 10 12 2 0 0 0 0 0 0 0 0 31 SSE 10 8 5 3 0 0 0 0 0 0 0 0 26 S 10 4 1 4 1 0 0 0 0 0 0 0 20 SSW 7 3 4 2 0 0 0 0 0 0 0 0 16 SW 4 4 4 1 0 0 0 0 0 0 0 0 13 WSW 2 5 2 1 0 0 0 0 0 0 0 0 10 W 13 16 4 1 0 0 0 0 0 0 0 0 34 WNW 23 34 7 3 0 0 0 0 0 0 0 0 67 NW 39 78 19 3 0 1 0 0 0 0 0 0 140 NNW 47 85 37 13 0 0 0 0 0 0 0 0 182 TOTAL 471 471 201 77 6 3 0 0 0 0 0 0 1229 NUMBER OF CALMS: 60 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1289 TOTAL HOURS FOR THE PERIOD: 1289

River Bend Station 2012 Regulatory Guide 1.21 Page 48 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/01/12 0:00 TO 12/31/12 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 2 3 6 33 52 216 368 39 3 0 0 0 722 NNE 4 6 14 31 58 189 258 14 1 0 0 0 575 NE 3 5 9 36 39 138 180 21 3 0 0 0 434 ENE 2 12 10 41 58 159 155 39 9 0 0 0 485 E 5 8 16 58 65 150 157 40 3 0 0 0 502 ESE 1 9 9 29 42 259 648 101 10 0 0 0 1108 SE 3 4 8 30 45 169 247 49 17 2 0 0 574 SSE 1 1 11 29 59 214 263 67 12 0 0 0 657 S 2 5 15 37 82 249 299 43 5 0 0 0 737 SSW 0 6 13 29 58 211 200 47 2 0 0 0 566 SW 1 6 4 25 47 138 97 12 2 0 0 0 332 WSW 1 6 7 39 65 184 74 13 1 0 0 0 390 W 5 4 7 24 71 161 97 9 3 0 0 0 381 WNW 0 5 4 21 34 105 125 30 15 0 0 0 339 NW 2 5 6 20 33 94 128 43 9 8 0 0 348 NNW 3 3 10 27 43 123 214 36 12 5 0 0 476 TOTAL 35 88 149 509 851 2759 3510 603 107 15 0 0 8626 NUMBER OF CALMS: 7 NUMBER OF INVALID HOURS: 151 NUMBER OF VALID HOURS: 8633 TOTAL HOURS FOR THE PERIOD: 8784

River Bend Station 2012 Regulatory Guide 1.21 Page 49 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 1/01/12 0:00 TO 12/31/12 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 2 19 2 23 NNE 6 17 3 26 NE 9 20 0 29 ENE 9 29 2 41 E 4 19 2 26 ESE 16 49 18 88 SE 9 25 4 39 SSE 7 8 7 23 S 9 10 6 26 SSW 1 7 2 10 SW 2 1 2 5 WSW 1 2 1 5 W 0 2 0 3 WNW 1 1 0 2 NW 3 4 4 12 NNW 2 4 5 15 TOTAL 0 1 0 1 7 81 217 58 6 2 0 0 373 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 373 TOTAL HOURS FOR THE PERIOD: 373

River Bend Station 2012 Regulatory Guide 1.21 Page 50 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 1/01/12 0:00 TO 12/31/12 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 7 0 19 NNE 0 3 0 7 NE 0 4 0 10 ENE 0 2 0 8 E 0 2 0 8 ESE 0 14 0 22 SE 0 10 0 20 SSE 0 6 0 22 S 0 13 0 23 SSW 0 10 0 13 SW 0 4 0 5 WSW 0 2 0 3 W 0 2 0 6 WNW 0 3 0 5 NW 0 4 0 10 NNW 0 11 0 17 TOTAL 0 0 0 3 7 58 97 31 2 0 0 0 198 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 198 TOTAL HOURS FOR THE PERIOD: 198

River Bend Station 2012 Regulatory Guide 1.21 Page 51 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 1/01/12 0:00 TO 12/31/12 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 6 12 4 1 0 0 0 23 NNE 0 0 0 2 0 2 13 0 0 0 0 0 17 NE 0 0 0 0 0 6 12 3 0 0 0 0 21 ENE 0 0 0 0 0 6 5 0 0 0 0 0 11 E 0 0 0 0 0 3 1 2 0 0 0 0 6 ESE 0 0 0 0 1 10 19 1 0 0 0 0 31 SE 0 0 0 0 1 5 7 1 1 0 0 0 15 SSE 0. 0 0 2 0 5 i4 6 1 0 0 0 28 S 0 0 0 1 0 5 11 6 0 0 0 0 23 SSW 0 0 0 0 0 4 7 2 0 0 0 0 13 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 2 8 0 0 0 0 0 10 W 0 0 0 0 0 1 2 0 0 0 0 0 3 WNW 0 0 0 0 1 3 6 3 2 0 0 0 15 NW 0 0 0 0 0 1 7 2 0 0 0 0 10 NNW 0 0 0 0 1 1 6 4 1 0 0 0 13 TOTAL 0 0 0 5 4 60 130 34 6 0 0 0 239 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 240 TOTAL HOURS FOR THE PERIOD: 240

River Bend Station 2012 Regulatory Guide 1.21 Page 52 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 1/01/12 0:00 TO 12/31/12 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 2 1 4 19 22 91 156 25 2 0 0 0 .322 NNE 0 1 2 10 24 69 71 9 1 0 0 0 187 NE 0 3 5 13 24 46 39 7 3 0 0 0 140 ENE 0 1 1 16 15 44 40 14 6 0 0 0 137 E 1 1 3 11 20 32 32 14 0 0 0 0 114 ESE 0 1 4 9 16 83 104 35 5 0 0 0 257 SE 0 2 5 10 13 57 65 21 13 2 0 0 188 SSE 0 0 2 11 20 72 93 39 8 0 0 0 245 S 0 1 5 7 25 55 113 16 4 0 0 0 226 SSW 0 0 6 9 22 60 68 37 1 0 0 0 203 SW 0 3 1 11 12 40 48 7 0 0 0 0 122 WSW 0 1 1 14 32 80 38 10 1 0 0 0 177 W 2 1 5 12 45 93 63 6 1 0 0 0 228 WNW 0 2 0 8 17 45 63 22 11 0 0 0 168 NW 0 0 1 11 18 41 63 27 8 8 0 0 177 NNW 0 0 1 12 29 35 94 24 6 3 0 0 204 TOTAL 5 18 46 183 354 943 1150 313 70 13 0 0 3095 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 3095 TOTAL HOURS FOR THE PERIOD: 3095

River Bend Station 2012 Regulatory Guide 1.21 Page-53 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 1/01/12 0:00 TO 12/31/12 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 5 17 54 89 2 0 0 0 0 167 NNE 1 3 7 13 18 49 77 1 0 0 0 0 169 NE 2 1 1 11 11 27 57 9 0 0 0 0 119 ENE 1 2 4 15 22 34 32 13 3 0 0 0 126 E 2 3 8 19 19 42 55 .18 3 0 0 0 169 ESE 0 1 3 9 12 65 216 42 3 0 0 0 351 SE 2 0 1 9 11 51 90 21 2 0 0 0 187 SSE 0 0 4 4 15 50 110 8 0 0 0 0 191 S 0 0 1 7 17 107 116 13 1 0 0 0 262 SSW 0 1 2 7 20 81 88 4 1 0 0 0 204 SW 0 1 1 5 17 53 37 3 1 0 0 0 118 WSW 0 2 1 6 11 51 16 2 0 0 0 0 89 W 0 0 0 4 6 25 17 1 2 0 0 0 55 WNW 0 1 1 7 3 21 19 4 2 0 0 0 58 NW 0 3 2 5 8 15 25 5 1 0 0 0 64 NNW 1 2 5 5 7 32 40 0 3 0 0 0 95 TOTAL 9 20 41 131 214 757 1084 146 22 0 0 0 2424 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2427 TOTAL HOURS FOR THE PERIOD: 2427

River Bend Station 2012 Regulatory Guide 1.21 Page 54 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 1/01/12 0:00 TO 12/31/12 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 4 4 13 47 0 0 0 0 0 68 NNE 3 1 1 4 26 27 1 0 0 0 0 64 NE 0 0 6 1 22 27 1 0 0 0 0 59 ENE 1 1 5 9 22 18 6 0 0 0 0 64 E 1 1 10 14 26 26 3 0 0 0 0 82 ESE 1 1 3 4 35 174 4 0 0 0 0 222 SE 0 1 6 10 19 30 0 0 0 0 0 67 SSE 1 0 3 6 36 17 0 0 0 63 0 0 S O 1 11 13 22 29 0 0 0 79 0 0 SSW 0 2 4 4 29 11 0 0 0 0 0 53 SW 0 1 2 8 18 2 0 1 0 0 0 33 WSW 0 0 3 8 18 5 0 0 0 0 0 36 W 1 2 1 5 10 3 0 0 0 0 0 22 WNW 0 0 3 1 10 8 0 0 0 0 0 23 NW 0 1 3 5 13 9 0 0 0 0 0 31 NNW 1 1 2 2 15 21 0 0 0 0 0 44 TOTAL 9 13 19 67 98 334 454 15 1 0 0 0 1010 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1011 TOTAL HOURS FOR THE PERIOD: 1011

River Bend Station 2012 Regulatory Guide 1.21 Page 55 of 91 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 1/01/12 0:00 TO 12/31/12 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 2 2 4 7 46 38 1 0 0 0 0 100 NNE 0 1 4 5 12 33 50 0 0 0 0 0 105 NE 1 1 1 5 2 24 21 1 0 0 0 0 56 ENE 0 8 3 5 11 39 29 3 0 0 0 0 98 E 1 3 4 18 10 38 22 1 0 0 0 0 97 ESE 0 5 2 8 5 45 72 0 0 0 0 0 137 SE 1 1 1 4 9 22 20 0 0 0 0 0 58 SSE 0 1 5 9 18 37 15 0 0 0 0 0 85 S 2 3 6 11 26 43 7 0 0 0 0 0 98 SSW 0 3 2 9 12 35 9 0 0 0 0 0 70 SW 1 1 1 7 10 24 5 0 0 0 0 0 49 WSW 1 3 3 16 13 31 3 0 0 0 0 0 70 W 2 1 2 6 15 30 8 0 0 0 0 0 64 WNW 0 2 2 3 12 24 25 0 0 0 0 0 68 NW 2 1 3 1 1 20 16 0 0 0 0 0 44 NNW 1 0 2 8 4 35 38 0 0 0 0 0 88 TOTAL 12 36 43 119 167 526 378 6 0 0 0 0 1287 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1289 TOTAL HOURS FOR THE PERIOD: 1289

River Bend Station R2012 Regulatory Guide 1.21 Page 56 of 91 TABLE 7 ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DOSE CALCULATIONS Analysis Location Ground Level Mixed Mode (meters) Releases Releases Gamma air dose (3) 994 m WNW CHI/Q - 421.0 CHI/Q - 33.1 and Beta Air Dose (Containment)

Maximum Receptor 994 m WNW CHI/Q - 421.0 CHI/Q - 33.1 (4)

Resident D/Q - 50.3 D/Q - 18.0 Garden Meat animal Immersion Milk animal (5) 7,000 m WNW CHI/Q - 3.58 CHI/Q - .870 D/Q - 0.38 D/Q - .223 Other on-site 115 m ENE CHI/Q - 5977.0 CHI/Q - 407.5 Receptors D/Q - 529.7 D/Q - 46.9 275 m N CHI/Q - 1644.0 CHI/Q - 169.1 D/Q - 345.6 D/Q - 68.4 2500 SW CHI/Q - 34.45 CHI/Q - 4.65 D/Q - 3.35 D/Q - 1.40 Notes: 3 (1) All CHI/Q = 10-7 sec/m (2) All D/Q = 10-9 m-2 (3) Maximum offsite location (property boundary) with highest CHI/Q (unoccupied).

(4) Maximum hypothetical occupied offsite location with highest CHI/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 2012 Regulatory Guide 1.21 Page 57 of 91 TABLE 8 GROUNDWATER MONITORING WELL SAMPLE RESULTS

River Bend Station 2012 Regulatory Guide 1.21 Page 58 of 91 GROUND WATER SAMPLES (H-3) - RBS LLD 3000 LAB ID LOCATION DATE TRITIUM 20120031 MW-100 1/10/2012 < 677 20120032 MW-04 1/9/2012 < 679 20120034 PZ-02 1/9/2012 < 680 20120035 PZ-03 1/10/2012 < 677 20120036 PZ-01 1/10/2012 51,679 +/-1117.81 20120037 PZ-01 DUP 1/10/2012 55,206 +/-1150.9 20120053 MW-04 1/18/2012 < 683 20120054 PZ-02 1/18/2012 < 629 20120055 MW-100. 1/18/2012 < 718 20120056 PZ-03 1/18/2012 < 725 20120058 PZ-01 1/18/2012 46,478 +/-1063.71 20120059 PZ-01 DUP 1/18/2012 46,648 +/-1077.42 20120094 MW-04 1/26/2012 < 638 20120095 MW-100 1/26/2012 < 641 20120096 PZ-02 1/26/2012 < 639 20120097 PZ-01 1/26/2012 56,850 +/-1159

River Bend Station 2012 Regulatory Guide 1.21 Page 59 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120098 PZ-01 DUP 1/26/2012 56,751 +/- 1165.08 20120136 MW-02 2/7/2012 < 626 20120137 MW-02 DUP 2/7/2012 < 624 20120138 MW-04 2/7/2012 < 623 20120139 MW-06 2/7/2012 < 623 20120140 MW-10 2/7/2012 < 626 20120141 MW-102 2/7/2012 < 625 20120143 MW-100 2/7/2012 < 624 20120144 PZ-03 2/7/2012 < 629 20120151 MW-18 2/8/2012 < 655 20120152 MW-08 2/8/2012 < 656 20120153 MW-19 2/8/2012 < 655 20120154 SW-104 2/8/2012 < 653 20120155 SW-103 2/8/2012 < 664 20120156 SW-102 2/9/2012 < 652 20120157 sw-101 2/9/2012 < 654 20120158 PZ-02 2/9/2012 < 654 20120159 PZ-01 2/9/2012 54,568 +/- 1150.71 20120160 PZ-01 DUP 2/9/2012 55,032 +/- 1150.98

River Benid Station 2012 Regulatory Guide 1.21 Page 60 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120290 PZ-02 2/28/2012 < 666 20120291 PZ-01 2/28/2012 52,122 +/- 1117.03 20120351 M.W-04 3/13/2012 < 681 20120352 PZ-01 3/13/2012 48,267 +/- 1087.98 20120353 PZ-01 DUP 3/13/2012 48,019 +/- 1087.98 20120478 MW-04 4/17/2012 < 1,224 20120479 PZ-01 4/17/2012 47,262 +/- 1860.76 20120480 PZ-01 DUP 4/17/2012 47,702 +/- 1869.71 20120494 MW-104 4/18/2012 < 1,238 20120495 MW-104 DUP 4/18/2012 < 1,272 20120509 MW-106 DUP 4/20/2012 633 +/- 187.31 20120510 MW-106 4/20/2012 700 +/- 190.34 20120513 MW-108 DUP 4/20/2012 < 1,073 20120514 MW-108 4/20/2012 < 1,074 20120518 MW-110 4/19/2012 50,518 +/- 1908.78 20120519 MW-110 DUP 4/19/2012 50,981 +/- 1918.28 20120586 MW-104 5/1/2012 < 647 20120587 MW-II0 5/1/2012 49,390 +/- 1092.52 20120588 MW-108 5/1/2012 < 647

River Bend Station 2012 Regulatory Guide 1.21 Page 61 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120595 MW-104 4/18/2012 < 638 20120596 MW-108 4/20/2012 < 639 20120598 MW-106 5/3/2012 < 648 20120608 MW-111 5/3/2012 < 655 20120609 MW-111 DUP 5/3/2012 < 652 20120610 MW-107 5/3/2012 < 652 20120611 MW-107 DUP 5/3/2012 < 654 20120612 MW-103 5/3/2012 < 654 20120613 MW-103 DUP 5/3/2012 < 659 20120699 PZ-03 5/22/2012 < 662 20120700 MW-100 5/22/2012 < 663 20120701 MW-04 5/22/2012 < 664 20120702 PZ-02 5/22/2012 < 664 20120703 MW-10 5/22/2012 < 665 20120704 SW-101 5/22/2012 < 666 20120705 SW-102 5/22/2012 < 662 20120706 SW-103 5/22/2012 < 665 20120707 MW-19 5/23/2012 < 668 20120708 SW-104 5/23/2012 < 635

River Bend Station 2012 Regulatory Guide 1.21 Page 62 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120709 MW-18 5/23/2012 < 637 20120710 MW-08 5/23/2012 < 636 20120711 MW-02 5/23/2012 < 637 20120712 MW-104 5/23/2012 < 636 20120713 MW-111 5/23/2012 < 639 20120714 MW-1 10 5/23/2012 58,122 +/- 1169.27 20120715 MW-110 DUP 5/23/2012 57,850 +/- 1182.59 20120717 MW-102 5/23/2012 < 655 20120718 MW-06 5/23/2012 < 667 20120719 MW-107 5/23/2012 < 653 20120720 MW-106 5/23/2012 < 658 20120721 MW-108 5/23/2012 < 659 20120722 MW-103 5/23/2012 < 657 20120723 PZ-01 5/23/2012 45,711 +/- 1049.75 20120724 PZ-01 DUP 5/23/2012 44,328 +/- 1047.96 20120746 MW-114 5/30/2012 1,265 +/- 363.8 20120747 MW-114 DUP 5/30/2012 1,256 +/- 361.8 20120753 MW-112 5/31/2012 9,477 +/- 669.19.

20120754 MW-112 DUP 5/31/2012 10,084 +/- 688.29

River Bend Station 2012 Regulatory Guide 1.21 Page 63 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120755 MW-116 5/31/2012 17,018 +/- 861.88 20120756 MW-116 DUP 5/31/2012 17,300 +/- 868.97 20120773 MW-120 6/4/2012 < 657 20120774 MW-120 DUP 6/4/2012 < 653 20120781 MW-118 6/5/2012 1,531 +/- 337.97 20120782 MW-118 DUP 6/5/2012 1,311 +/- 329.07 20120785 MW-122 6/5/2012 < 672 20120786 MW-122 DUP 6/5/2012 < 700 20120790 MW-114 6/5/2012 1,296 +/-330 20120791 MW-114 DUP 6/5/2012 1,304 +/- 331.59 20120792 MW-112 6/5/2012 7,292 +/- 507.3 20120793 MW-112 DUP 6/5/2012 7,228 +/- 490.91 20120794 MW-116 6/5/2012 18,365 +/- 698.16 20120795 MW-116 DUP 6/5/2012 18,271 +/- 701.23 20120887 MW-107 6/25/2012 < 696 20120888 MW-106 6/25/2012 < 735 20120889 MW-120 6/25/2012 < 708 20120890 MW-111 6/25/2012 < 714 20120891 MW-110 6/25/2012 34,858 +/-943.65

River Bend Station 2012 Regulatory Guide 1.21 Page 64 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120892 MW-118 6/25/2012 3,192 +/-386.23 20120893 MW-122 6/26/2012 < 709 20120895 MW-116 6/26/2012 17,135 +/-682.87 20120897 MW-04 6/26/2012 < 701 20120898 MW-114 6/26/2012 1,417 +/- 321.41 20120900 MW-103 6/26/2012 < 731 20120901 PZ-01 6/26/2012 38,985 +/- 986.62 20120902 MW-112 6/26/2012 6,711 +/- 499.51 20120943 MW-04 7/16/2012 < 692 20120944 MW-106 7/16/2012 < 613 20120945 MW-110 7/18/2012 30,859 +/-966.45 20120946 MW-110 DUP 7/18/2012 33,740 +/- 1002.92 20120947 MW-112 7/16/2012 6,089 +/-483.23 20120949 MW-114 7/17/2012 1,481 +/- 319.50 20120950 MW-116 7/17/2012 16,313 +/-711.51 20120951 MW-116 DUP 7/17/2012 17,003 +/- 725.68 20120952 MW-118 7/17/2012 2,638 +/- 393.95 20120953 MW-120 7/17/2012 < 685 20120954 MW-122 7/17/2012 < 585

River Bend Station 2012 Regulatory Guide 1.21 Page 65 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20120955 PZ-01 7/17/2012 38,808 +/- 1064.59 20120964 MW-128 7/18/2012 < 579 20120969 MW-134 7/18/2012 < 566 20120970 MW-130 7/18/2012 < 645 20121007 MW-132 7/23/2012 < 671 20121009 MW-124 7/23/2012 432,733 +/-4179.58 20121010 MW-124 DUP 7/23/2012 406,935 +/- 3580.22 20121011 MW-126 7/23/2012 2,301 +/-421.52 20121012 MW-126 DUP 7/23/2012 3,992 +/- 415.67 20121061 MW-124 8/7/2012 457,082 +/- 3587.50 20121062 MW-124 DUP 8/7/2012 462,831 +/- 3618.52 20121063 MW-126 8/7/2012 4,099 +/- 424.60 20121064 MW-126 DUP 8/7/2012 5,428 +/- 464.43 20121067 MW-130 8/7/2012 < 614 20121068 MW-130 DUP 8/7/2012 < 597 20121069 MW-132 8/7/2012 < 619 20121070 MW-132 DUP 8/7/2012 < 599 20121071 MW-134 8/7/2012 < 613 20121072 MW-134 DUP 8/7/2012 < 605

River Bend Station 2012 Regulatory Guide 1.21 Page 66 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20121093 MW-137 8/14/2012 12,042 +/- 634.59 20121094 MW-137 DUP 8/14/2012 12,290 +/- 640.07 20121135 MW-15 8/20/2012 < 590 20121137 MW-12 8/20/2012 < 588 20121144 MW-16 8/20/2012 < 591 20121145 MW-21 8/20/2012 < 591 20121146 PZ-2 8/20/2012 < 591 20121155 MW-03 8/21/2012 < 605 20121156 MW-05 8/21/2012 < 603 20121157 MW-01 8/21/2012 < 606 20121158 MW-17 8/21/2012 < 602 20121159 MW-100 8/21/2012 < 604 20121160 PZ-03 8/21/2012 < 605 20121161 MW-124 8/21/2012 338,882 +/- 5341.26 20121162 MW-126 8/21/2012 2,300 +/- 624.32 20121163 MW-130 8/21/2012 < 634 20121164 MW-128 8/21/2012 < 630 20121165 MW-132 8/21/2012 < 636 20121166 MW-14 8/21/2012 < 638

River Bend Station 2012 Regulatory Guide 1.21 Page 67 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20121167 MW-20 8/21/2012 < 636 20121168 SW-104 8/21/2012 < 631 20121169 SW-103 8/21/2012 < 636 20121170 SW-102 8/21/2012 < 636 20121171 MW-134 8/21/2012 < 634 20121173 MW-10 8/22/2012 < 545 20121174 MW-04 8/22/2012 < 549 20121175 MW-04 DUP 8/22/2012 < 546 20121176 MW-141 8/22/2012 1,177 +/- 294.06 20121177 MW-141 DUP 8/22/2012 1,112 +/-290.79 20121178 MW-111 8/22/2012 < 546 20121179 MW-111 DUP 8/22/2012 < 545 20121180 MW-102 8/22/2012 < 548 20121181 MW-18 8/22/2012 < 701 20121182 MW-08 8/22/2012 < 550 20121183 MW-19 8/22/2012 < 766 20121184 T-14 8/22/2012 < 635 20121185 MW-02 8/22/2012 < 535 20121186 MW-09 8/22/2012 < 763

River Bend Station 2012 Regulatory Guide 1.21 Page 68 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20121187 MW-06 8/22/2012 < 646 20121188 MW-107 8/22/2012 < 537 20121189 MW-107 DUP 8/22/2012 < 535 20121190 MW-104 8/22/2012 < 536 20121191 MW-108 8/22/2012 < 537 20121192 MW-139 8/22/2012 1,579 +/- 325.88 20121193 MW-139 DUP 8/22/2012 1,551 +/- 323.48 20121194 MW-103 8/22/2012 1,122 +/- 286.24 20121195 MW-103 DUP 8/22/2012 1,453 +/- 307.89 20121196 MW-07 8/22/2012 < 558 20121197 MW-li 8/22/2012 < 561 20121198 MW-13 8/22/2012 < 559 20121199 SW-101 8/22/2012 < 558 20121352 MW-148 10/1/2012 < 571 20121353 MW-148 DUP 10/1/2012 < 568 20121363 MW-146 10/2/2012 7,403 +/- 512.06 20121366 MW-144 10/1/2012 < 569 20121369 MW-142 10/2/2012 < 571 20121372 MW-125 10/3/2012 545,774 +/- 3897.95

River Bend Station 2012 Regulatory Guide 1.21 Page 69 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20121375 MW-139 10/3/2012 1,957 +/- 334.69 20121376 MW-141 10/3/2012 < 569 20121377 MW-137 10/3/2012 40,426 +/-1082.94 20121421 MW-106 10/16/2012 < 598 20121422 MW-107 10/16/2012 < 599 20121423 MW-108 10/16/2012 < 599 20121424 MW-104 10/16/2012 < 599 20121425 MW-120 10/16/2012 < 599 20121426 MW-04 10/16/2012 < 598 20121427 MW-02 10/16/2012 < 596 20121428 DUP MW-02 10/16/2012 < 597 20121429 MW-102 10/16/2012 < 601 20121430 DUP-MW-102 10/16/2012 < 600 20121431 MW-137 10/16/2012 38,390 +/- 1060.80 20121432 MW-148 10/16/2012 < 627 20121433 MW-146 10/16/2012 19,721 +/- 789.94 20121434 MW-144 10/16/2012 < 627 20121437 MW-142 10/17/2012 < 626 20121438 DUP-MW-142 10/17/2012 < 626

River Bend Station 2012 Regulatory Guide 1.21 Page 70 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20121439 MW-125 10/17/2012 568,839 +/- 4015.17 20121440 PZ-03 10/17/2012 < 625 20121441 MW-100 10/17/2012 < 628 20121443 MW-128 10/17/2012 < 626 20121444 MW-130 10/17/2012 < 627 20121445 MW-132 10/17/2012 < 624 20121446 MW-134 10/17/2012 < 627 20121447 SW-101 10/17/2012 < 606 20121448 MW-10 10/17/2012 < 605 20121449 MW-06 10/17/2012 < 603 20121450 MW-08 10/17/2012 < 607 20121451 SW-102 10/17/2012 < 609 20121452 MW-18 10/17/2012 < 608 20121453 SW-103 10/17/2012 < 608 20121454 SW-104 10/17/2012 < 607 20121455 MW-19 10/17/2012 < 606 20121456 MW-111 10/17/2012 < 607 20121457 PZ-02 10/17/2012 < 607 20121458 MW-103 10/17/2012 1,025 +/- 306.05

River Bend Station 2012 Regulatory Guide 1.21 Page 71 of 91 LLD 3000 LAB ID LOCATION DATE TRITIUM 20121459 PZ-01 10/17/2012 19,340 +/- 780.38 20121460 PZ-01-DUP 10/17/2012 19,338 +/- 779.54 20121461 MW-ll0 10/17/2012 63,941 +/- 1366.60 20121462 MW-118 10/17/2012 3,644 +/- 409.24 20121463 MW-114 10/17/2012 2,300 +/-360.57 20121464 MW-112 10/17/2012 4,112 +/- 426.83 20121465 MW-139 10/17/2012 1,329 +/- 321.71 20121466 MW-124 10/18/2012 360,505 +/- 3196.39 20121467 MW-126 10/18/2012 1,476 +/- 331.45 20121476 MW-141 10/18/2012 < 609 20121479 MW-122R 10/18/2012 < 604 20121683 MW-153 11/21/2012 < 585 20121684 DUP MW-153 11/21/2012 < 586 20121685 MW-116 11/21/2012 22,702 +/- 835.79 20121785 MW-151 12/8/2012 1,713 +/- 336.60 20121786 DUP-MW-151 12/8/2012 1,456 +/- 326.00 20121809 MW-131 12/11/2012 < 604 20121810 MW-131-D 12/11/2012 < 607

River Bend Station 2012 Regulatory Guide 1.21 Page 72 of 91 GROUND MONTORING WELL SAMPLES (GAMMA) - RBS LLD (pCi/I) 15 15 30 15 30 15 30 15 .15 18 60 15 LAB ID LOCAT ION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120031 MW-100 1/10/2012

• 11.00 < 10.80 < 26.50 < 11.40

• 25.30

• 10.40 < 22.60 < 14.00 < 14.10 < 12.10

• 3;2.20

• 11.40 20120032 MW-04 1/9/2012

• 11.50

• 10.50 < 15.50 < 13.90 < 19.10 < 11.00

• 18.10

• 10.60 < 10.30 < 10.20 < 39.80 < 14.70 20120034 PZ-02 1/9/2012 < 10.10 < 8.31 < 19.00 < 7.95 < 27.30 < 8.91 < 17.40 < 7.18

• 10.20 < 10.80 < 30.10 < 7.95 20120035 PZ-03 1/10/2012

• 11.20 < 11.70 < 4.31 < 12.30 < 16.60 < 11.20 < 18.20 < 12.10

• 11.60 < 10.30 < 36.70 < 9.60 20120036 PZ-01 1/10/2012 < 8.98 < 6.97 < 15.80

• 10.40 < 12.60 < 9.23

• 14.30

• 9.55 < 9.60 < 9.84

• 37.60

• 13.00 20120037 PZ-01 DUP 1/10/2012 < 11.80 < 8.77 < 25.00

• 7.24 < 26.30 < 10.50

• 19.00

• 11.40

• 8.96 < 10.80

• 42.90 < 10.00 20120053 MW-04 1/18/2012 < 13.80 < 11.50 < 22.20 < 8.96 < 29.40

• 14.10 < 24.50 < 9.81 < 11.70 < 12.00

• 33.60 < 4.03 20120054 PZ-02 1/18/2012 < 7.98 < 7.07 < 14.00 < 5.18 < 15.80

• 9.82 < 11.50 < 8.17 < 8.25 < 8.43 < 28.00 < 14.70 20120055 MW-100 1/18/2012

• 13.30 < 8.63 < 19.60 < 12.90

• 24.10 < 11.90 < 21.60 < 9.75 < 10.40

• 11.30 < 36.80 < 9.64 20120056 PZ-03 1/18/2012 < 10.30 < 10.10 < 21.00 < 10.60 < 15.90 < 12.70 < 23.10 < 10.80 < 10.60

• 13.80

• 42.80

• 11.30 20120058 PZ-01 1/18/2012 < 12.90 < 10.90 < 23.80 < 14.70

• 20.00

• 11.30 < 17.50 < 9.09 < 9.10 < 10.20 < 37.40

• 11.00 20120059 PZ-01 DUP 1/18/2012 < 12.60 < 7.15 < 19.00 < 5.91 < 21.50 < 12.10 < 18.70 < 8.91 < 10.70 < 8.29 < 31.70 < 14.20

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 73 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120094 MW-04 1/26/2012 < 8.05 < 7.95 < 13.80 < 11.40 < 20.30 < 9.41 < 16.20 < 9.30 < 8.40 < 9.60 < 37.20 < 13.90 20120095 MW-100 1/26/2012 < 10.90 < 9.02 < 12.00 < 7.91 < 20.50 < 11.50 < 19.40

• 8.36

• 8.52 < 10.10 < 28.90 < 13.60 20120096 PZ-02 1/26/2012 < 8.84 < 6.85 < 15.50 < 7.76 < 18.40 < 9.00 < 11.80 < 7.57 < 8.96 < 9.10 < 29.90 < 11.80 20120097 PZ-01 1/26/2012 < 13.10 < 6.11 < 16.10 < 7.27 < 25.30

• 11.40 < 19.00 < 10.50 < 8.80 < 13.90

• 35.10

• 14.40 20120098 PZ-01 DUP 1/26/2012 < 10.40 < 7.24 < 13.10 < 7.72 < 29.90 < 11.20

• 17.70

• 9.66 < 9.87 < 13.40 < 30.80 < 13.50 20120136 MW-02 2/7/2012 < 9.46 < 9.34 < 24.70 < 8.59 < 25.10 < 10.80

• 17.90

• 11.50

• 7.87 < 13.00 < 37.90 < 14.00 20120137 MW-02 DUP 2/7/2012 < 11.90 < 11.30 < 16.60 < 10.90 < 20.70

• 12.20 < 18.60 < 11.40 < 7.07

• 11.10 < 35.70 < 13.70 20120138 MW-04 2/7/2012 < 12.90 < 9.65 < 13.50 < 8.81 < 15.10 < 10.10

• 19.60 < 10.40 < 6.85 < 12.50 < 40.00 < 11.10 201.20139 MW-06 2/7/2012 < 9.57 < 9.44 < 15.50 < 9.09 < 22.90 < 10.20 < 20.90 < 11.60 < 9.36 < 10.10 < 36.50 < 14.96 20120140 MW-10 2/7/2012 < 12.00 < 12.80 < 21.80 < 9.40

• 27.50 < 9.76 < 17.60 < 11.30 < 12.10 < 12.10 < 39.50 < 13.70 20120141 MW-102 2/7/2012 < 10.10 < 11.40 < 16.10 < 11.00 < 25.40

• 12.10

• 19.70

• 11.60 < 11.00

• 11.20 < 39.90 < 13.20 20120143 MW-100 2/7/2-012 < 9.70 < 9.58 < 17.90 < 12.80 < 20.00 < 7.54

• 15.20

• 8.73 < 9.70

• 10.80 < 29.00

• 14.80 20120144 PZ-03 2/7/2012 < 9.16 < 10.90 < 16.90 < 12.40

• 21.10

• 9.32

• 16.80 < 10.90 < 6.61 < 10.20

• 29.40 < 13.90

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 74 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120151 MW-18 2/8/2012 < 9.02 < 10.50 < 23.40 < 14.96 < 24.80 < 10.70 18.10 < 9.69 < 12.20 11.50

• 26.80 < 12.90 20120152 MW-08 2/8/2012 < 8.86 < 7.00 < 14.30 < 9.33 < 20.90 < 8.39 14.20

• 7.52 < 7.97 9.08 < 32.00

• 13.10 20120153 MW-19 2/8/2012 < 9.77 < 8.21 < 14.50 < 9.47 < 18.80

• 9.23 18.80

• 8.79 < 9.35 8.81 < 27.00 < 13.70 20120154 SW-104 2/8/2012 < 14.00 < 11.70 < 24.70 < 11.50 < 15.50 < 14.90 22.20 < 10.40 < 13.60 16.30 < 29.80 < 11.40 20120155 SW-103 2/8/2012 < 12.40 < 13.40 < 21.00 < 8.44

• 18.20 < 12.90 21.10 < 9.53 < 9.75 13.70 < 49.60 < 10.60 20120156 SW-102 2/9/2012 < 8.38 < 10.30 < 23.40 < 8.61

• 12.90 < 12.30 15.50 < 8.45 < 9.97 10.20 < 39.30 < 11.60 20120157 SW-101 2/9/2012 < 7.48 < 14.80 < 21.40 < 12.80

• 21.70 < 11.80 16.30 < 9.36 < 11.80 14.00

• 36.20 < 10.50 20120158 PZ-02 2/9/2012 < 10.70 < 9.59 < 21.80 < 11.10

• 22.00 < 12.70 17.60 < 11.90 < 9.84 12.50 < 27.90 < 13.50 20120159 PZ-01 2/9/2012 < 10.70 < 9.74 < 18.50 < 12.00 < 20.40

• 10.60 18.10 < 9.07 < 10.80 11.00 < 41.00 < 14.50 20120160 PZ-01 DUP 2/9/2012 < 7.52 < 12.90 < 21.60 < 8.62

• 21.10

• 11.80 14.20 < 12.00 < 7.76 8.89

• 24.20 < 13.40 20120290 PZ-02 2/28/2012 < 12.20 < 9.63 < 16.90 < 12.90 < 19.00 < 8.23 18.20 < 11.30 < 9.64 10.40 < 41.30 < 10.80 20120291 PZ-01 2/28/2012 < 12.30 < 9.53 < 19.80 < 11.80 < 22.40 < 12.60 20.90 < 9.88 < 8.22 13.00 < 35.70

• 9.76 20120351 MW-04 3/13/2012 < 13.30 < 9.87 < 13.70 < 12.00 < 25.30 < 11.70 < 22.50 < 9.13 < 10.10 < 12.10 < 36.00 < 4.06

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 75 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 ,CS-137 BA-140 LA-140 20120352 PZ-01 3/13/2012 < 11.60 < 12.00 < 15.90 < 13.40 < 14.20 < 10.80

• 19.60 < 8.92 < 11.00 < 12.50 < 47.30 < 12.80 20120353 PZ-01 DUP 3/13/2012 < 11.80 < 8.32 < 18.90 < 10.10 < 19.10

• 8.64 < 19.00 < 10.40 < 7.28

• 11.40 < 33.90 < 13.60 20120478 MW-04 4/17/2012 < 8.85 < 14.10 < 24.20

• 8.89 < 24.80 < 12.90

• 18.40

• 11.20 < 8.42 < 13.80 < 40.50 < 14.10 20120479 PZ-01 4/17/2012 < 12.80 < 9.80 < 19.00 < 11.20 < 25.00 < 10.60 < 20.10 < 10.70 < 11.80 < 9.63

• 29.60 < 12.50 20120480 PZ-01 DUP 4/17/2012 < 4.76 < 9.59 < 21.80 < 11.40 < 21.30 < 12.30 < 18.50

• 11.10

• 10.20 < 9.96 < 36.30 < 14.40 20120494 MW-104 4/18/2012 < 13.40 < 11.20 < 19.80 < 11.00 < 21.80 < 14.80 < 18.00 < 8.31 < 9.45 < 13.00 < 33.30

• 13.70 20120495 MW-104 DUP 4/18/2012 < 11.60

• 10.80 < 24.50 < 3.08 < 29.20 < 10.30 < 19.80 < 10.10 < 10.60 < 10.60 < 43.20

• 13.20 20120510 MW-106 4/20/2012 < 7.20 < 9.12 < 12.60 < 6.69 < 12.80 < 6.69 < 9.80 < 7.05

• 7.12 < 7.66 < 31.00 < 14.60 20120514 MW-108 4/20/2012 < 11.50 < 9.76 < 19.20 < 13.30

• 18.70 < 11.80 < 19.00

• 12.90

• 10.20 < 10.00

• 41.90 < 13.30 20120518 MW-110 4/19/2012 < 8.97

• 8.02 < 2)1.00 < 8.86 < 19.10

• 9.25 < -17.80 < 9.74

• 9.10 < 9.74

• 35.20 < 14.60 20120586 MW-104 5/1/2012 < 14.00

• 9.35 < 18.40 < 9.53 < 23.90 < 9.98

• 19.70 < 10.80 < 11.90 < 12.80 < 43.20 < 11.90 20120587 MW-110 5/1/2012 < 11.20 < 7.83 < 12.30 < 10.60 < 19.90 < 10.10 < 15.60 < 8.98 < 8.92 < 9.16 < 31.80 < 14.60 20120588 MW-108 5/1/2012 < 8.36 < 11.70 < 13.70 < 8.82 < 19.80 < 10.60 < 16.50 < 8.59 < 8.54 < 8.11 < 30.00 < 13.40

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 76 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120598 MW-106 5/3/2012 < 12.10 < 11.90 < 22.90 < 10.60 < 23.20 < 14.50 < 16.00 < 11.30 < 11.70 < 11.70 < 36.60 < 11.20 20120608 MW-]II 5/3/2012 < 9.72 < 8.12 < 16.20 < 8.76 < 15.00 < 7.55 < 12.70 < 7.79 < 8.19 < 8.38 < 23.00 < 12.90 20120610 MW-107 5/3/2012 < 7.91 < 8.94 < 16.30 < 8.61

• 29.50 < 12.80 < 17.90

• 6.42 < 8.61 < 9.76 < 37.20 < 8.18 20120612 MW-103 5/3/2012 < 9.01 < 10.50 < 13.70 < 8.99 < 26.90

• 9.72 < 20.60 < 10.20 < 8.99 < 12.70 < 31.70 < 13.70 20120699 PZ-03 5/22/2012 < 12.10 < 12.70 < 25.30 < 14.90 < 26.00 < 12.20 < 19.20 < 9.38 < 10.10 < 9.96 < 38.00 < 11.70 20120700 MW-100 5/22/2012 < 10.40 < 10.20 < 10.70 < 8.95 < 17.00 < 10.10 < 15.30 < 7.18 < 8.64

• 6.55 < 31.80 < 14.30 20120701 MW-04 5/22/2012 < 8.95 < 11.30 < 15.70 < 12.20 < 11.80 < 10.40 < 17.20 < 9.53

• 10.10 < 6.63

• 31.30' < 14.00 20120702 PZ-02 5/22/2012 < 8.97 < 11.90- < 19.20 < 7.69 < 17.80 < 9.89 < 12.90 < 7.88 < 8.72 < 7.81 < 31.80

• 11.90 20120703 MW-10 5/22/2012 < 10.50 < 10.70 < 18.90 < 14.40 < 21.90 < 11.10 < 18.50

• 9.19

• 10.50 < 11.10 < 38.40 < 12.70 20120704 SW-101 5/22/2012 < 6.86 < 6.77 < 12.70 < 9.11

• 14.20 < 7.43 < 11.70 < 8.69 < 6.19 < 9.56 < 26.00 < 14.50 20120705 SW-102 5/22/2012 < 13,50 < 10.50 < 17.60 < 8.91 < 17.00

• 9.65 < 14.40

• 7.90

• 10.50 < 5.50

• 27.70 < 14.70 20120706 SW-103 5/22/2012 < 8.01 < 9.77 < 19.10 < 6.14 < 25.90 < 7.04 < 15.10 < 10.60 < 10.10 < 9.99 < 37.10 < 12.60 20120707 MW-19 5/23/2012 < 11.40 < 9.57 < 19.90 < 12.70 < 18.80 < 10.80 < 14.80 < 11.40 < 11.90 < 11.70 < 47.30 < 14.00

- See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 77 of 91 LLD (pCi/1) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120708 SW-104 5/23/2012 < 13.30 < 11.50 < 12.10 < 10.40 < 24.10 < 11.00 < 13.50 < 9.44 < 9.13 < 10.00 < 42.90 < 14.70 20120709 MW-18 5/23/2012 < 8.96 < 9.25

• 15.80

• 7.33 < 28.00

• 9.59

• 16.00

• 8.24 < 10.40 < 10.20 < 33.50 < 9.29 20120710 MW-08 5/23/2012 < 14.70 < 11.70 < 17.50 < 10.10 < 26.80 < 11.70 < 20.20

• 9.43 < 13.30 < 11.90 < 33.30 < 9.68 20120711 MW-02 5/23/2012 < 8.23

• 9.02 < 13.40 < 8.24 < 19.50 < 8.44 < 15.70

• 8.39 < 6.29 < 9.06 < 33.00 < 12.30 20120712 MW-104 5/23/2012 < 10.30 < 12.00 < 29.00

• 11.70 < 26.00 < 14.10 < 24.40 < 12.40 < 13.90 < 9.96 < 27.30

• 14.80 20120713 MW-111 5/23/2012 < 9.82 < 9.35 < 16.50 < 10.80

• 18.50 < 9.94 < 17.60 < 9.98 < 9.44 < 11.60 < 39.10

• 14.50 20120714 MW-I10 5/23/2012 < 10.90 < 8.09 < 17.80 < 10.30 < 26.50 < 9.76

• 14.90 < 8.86 < 9.33 < 8.70 < 32.10 < 8.39 20120715 MW-110 DUP 5/23/2012 < 9.46 < 8.27

• 17.00 < 10.60 < 22.00 < 10.10 < 15.50 < 10.80 < 11.00 < 9.77 < 36.50 < 14.80 20120717 MW-102 5/23/2012

• 11.30 < 9.63 < 16.10 < 10.20 < 27.10 < 11.60 < 18.50 < 9.70 < 10.20 < 11.40 < 34.50 < 14.70 20120718 MW-06 5/23/2012 < 10.80 < 12.90 < 20.20 < 6.44 < 21.10 < 11.10 < 15.40 < 10.70 < 12.00 < 9.17 < 33.20 < 14.80 20120719 MW-107 5/23/2012 < 9.15 < 8.70

• 10.60 < 10.60

• 23.00 < 6.77 < 16.30 < 10.20 < 10.10 < 9.20 < 29.90

• 12.50 20120720 MW-106 5/23/2012 < 13.80 < 9.88 < 13.80 < 11.90 < 29.50 < 13.80 < 21.30 < 9.82 < 13.50 < 8.63 < 39.70

• 14.50 20120721 MW-108 5/23/2012 < 8.34 < 9.49 < 21.20 < 12.10 < 18.40 < 9.11 < 17.30 < 13.20 < 9.98 < 10.40 < 40.60 < 14.40

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21P Page 78 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120722 MW-103 5/23/2012 < 12.40 < 12.30 18.70 < 9.47 < 21.20 < 11.80 < 15.40 < 10.40 < 10.80 < 9.68 < 50.70 < 14.60 20120723 PZ-01 5/23/2012 < 10.30

• 14.10 12.10 < 7.92 < 17.10 < 12.60 < 20.80

• 10.40 < 8.11

• 14.70 < 41.40

• 3.68 20120724 PZ-01 DUP 5/23/2012 < 11.30 < 11.20 24.50 < 8.89 < 27.30 < 10.30 < 15.70 < 11.70 < 9.24 < 13.80 < 27.40 < 13.10 20120746 MW-1 14 5/30/2012 < 9.05 < 9.75 28.20 < 10.30 < 13.90 < 13.90 < 18.10 < 9.23 < 7.77 < 11.60 < 31.70 < 10.30 20120747 MW-1 14 DUP 5/30/2012 < 9.18

• 10.90 19.10

• 9.75 < 18.50 < 11.60 < 13.30 < 10.60

• 7.23 < 10.30 < 39.00 < 14.80 20120753 MW-112 5/31/2012 < 8.35 < 8.96 16.70 < 8.58 < 24.70 < 9.18 < 15.50 < 8.45

• 8.42

• 10.70 < 30.30 < 14.10 20120754 MW-112 DUP 5/31/2012 < 10.70 < 10.50 20.00 < 12.90 < 24.70 < 12.70

• 27.00 < 11.00

• 9.88

• 11.90 < 39.10 < 13.60 20120755 MW-116 5/31/2012 < 12.10 < 8.79 23.00

• 7.27 < 23.20 < 12.70 < 17.10 < 10.80 < 9.39 < 8.97

• 39.10 < 14.90 20120756 MW-116 DUP 5/31/2012 < 11.60

• 8.98 19.60 < 12.10 < 19.00 < 10.30 < 18.20 < 9.16

• 9.33 < 11.20 < 35.80

• 14.30 20120773 MW-120 6/4/2012

• 7.77 < 9.77 14.60

• 9.29 < 22.80 < 9.04 < 15.90 < 7.31 < 9.54 < 8.22 < 25.30

• 13.90 20120774 MW-120 DUP 6/4/2012 < 9.23 < 11.10 15.60 < 9.28

• 10.80 < 11.30 < 14.80

• 8.77 < 8.62 < 6.78 < 34.80 < 13.60 20120781 MW-118 6/5/2012 < 11.30 < 12.20 < 21.90 < 10.20 < 21.80 < 10.50 < 17.10 < 8.88 < 9.52 < 11.40 < 34.10 < 14.90

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 79 of 91 LLD (pCi/1) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 C0-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120782 MW-118 DUP 6/5/2012 < 10.20 < 10.30 < 20.70 < 9.84 < 20.80 < 11.40 < 15.80 < 9.40 < 10.50 < 10.40 < 33.00 < 14.80 20120785 MW-122 6/5/2012

• 10.10 < 9.53 < 9.12 < 9.12 < 21.50

• 10.50 < 9.37 < 8.92 < 9.37 < 9.39 < 31.70 < 12.30 20120786 MW-122 DUP 6/5/2012 < 7.35 < 6.81 < 14.10 < 9.04 < 14.60 < 9.43 < 13.40 < 6.99 < 8.08 < 7.77 < 28.60 < 11.60 20120790 MW-114 6/5/2012 < 11.20 < 11.50 < 16.40 < 10.60 < 23.80 < 10.90 < 14.90 < 10.10 < 9.93 < 10.80 < 27.20 < 14.40 20120791 MW-I 14 DUP 6/5/2012 < 6.82 < 8.27 < 16.20 < 5.97

• 24.50 < 12.20 < 16.20 < 9.41 < 6.04 < 10.00 < 34.30 < 13.70 20120792 MW-112 6/5/2012 < 7.69 < 9.77

• 13.60 < 8.10

• 25.00 < 8.33 < 16.90 < 7.75 < 11.80 < 12.00 < 17.40 < 10.90 20120793 MW-1 12 DUP 6/5/2012 < 9.71

• 9.55 < 18.80 < 9.24 < 21.80 < 11.50. < 16.50

• 8.80 < 8.79 < 11.00 < 34.70 < 14.30 20120794 MW-116 6/5/2012

• 11.90 < 9.87

• 17.10 < 9.74

• 25.30

• 11.10 < 21.10 < 11.20 < 11.30 < 14.30 < 41.30 < 11.80 20120795 MW-116 DUP 6/5/2012 < 9.28 < 8.00 < 15.50

• 10.50 < 15.80

• 9.70 < 14.70 < 7.51 < 8.90 < 9.42 < 29.40 < 12.80 20120887 MW-107 6/25/2012 < 13.70 < 8.04 < 21.50 < 13.60 < 23.40 < 11.90

• 18.00 < 13.30 < 12.20 < 11.70 < 47.60 < 13.20 20120888 MW-106 6/25/2012

• 7.09 < 6.30

• 12.30 < 6.62

• 16.50 < 8.52

• 13.20 < 8.76

• 6.80

• 5.46 < 31.00 < 13.00 20120889 MW-120 6/25/2012 < 9.30 < 7.71

• 14.60 < 8.34 < 28.80 < 8.12 < 16.20 < 11.50

• 7.66 < 10.70 < 39.50 < 13.10 20120890 MW-111 6/25/2012 < 10.90 < 9.54 < 17.10 < 8.26 < 21.00 < 10.00 < 15.20 < 10.40 < 8.47 < 9.82 < 36.00 < 13.10

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21P Page 80 of 91 LLD (pCi/i1) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120891 MW-110 6/25/2012 < 12.30 < 11.80 < 12.10 < 12.30 21.40 < 14.00 17.40 < 14.98

• 10.50 < 13.30 < 49.10 < 13.60 20120892 MW-118 6/25/2012 < 11.60 < 8.92 < 13.90 < 8.82 13.10 < 9.59 11.70 < 9.68 < 9.62 < 12.10 < 35.20 < 13.90 20120893 MW-122 6/26/2012 < 9.64 < 9.09 < 13.80 < 9.13 <24.30

• 12.70 20.30 < 11.50 < 9.42 < 12.40 < 35.70 < 14.40 20120895 MW- 116 6/26/2012 < 7.41 < 6.72 < 13.40 < 8.01 16.80

• 8.40 13.20

• 9.75

• 7.45 < 7.32

• 30.10

• 11.70 20120897 MW-04 6/26/2012 < 9.63 < 12.90 < 6.88 < 7.15 27.80 < 8.68 21.30 < 14.50 < 8.13 < 11.80 < 52.60

• 13.20 20120898 MW-1 14 6/26/2012 < 12.30 < 9.21 < 18.60 < 10.60 23.10 < 10.90 18.50 < 9.76 < 8.69 < 10.30 < 38.60

• 13.70 20120900 MW-103 6/26/2012 < 10.00 < 7.27 < 14.20 < 8.07 18.30 < 8.29 15.70 < 9.27 < 8.20

• 7.67 < 31.40

• 14.00 20120901 PZ-01 6/26/2012 < 8.07 < 7.44 < 15.50 < 9.31 14.70 < 8.42 13.50 < 10.30

• 8.20 < 9.40

• 32.70 < 12.10 20120902 MW-I 12 6/26/2012 < 9.63 < 11.10 < 23.60 < 7.15 24.30 < 12.00 19.20 < 12.30

• 9.89 < 11.80

• 38.90 < 11.20 20120943 MW-04 7/16/2012 < 8.87 < 8.82 < 15.40 < 13.20 17.00 < 7.94 13.00 < 9.05 < 10.50 < 9.13 < 42.30 < 13.20 20120944 MW-106 7/16/2012 < 11.10 < 6.44 < 20.80 < 7.53 29.30

• 12.20 22.60

• 13.90

• 9.13 < 11.80 < 42.80 < 3.68 20120945 MW-JI0 7/18/2012 < 13.40 < 12.00 < 20.10 < 14.95 24.20 < 14.50 21.90 < 14.50 < 12.30 < 15.60 < 49.30

• 11.50 20120946 MW-I10 DUP 7/18/2012 < 11.60 < 10.80 < 19.30 < 9.06 < 23.90 < 9.94 < 16.30 < 9.02 < 9.02 < 9.13 < 37.70 < 13.00

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 81 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20120947 MW-112 7/16/2012 < 7.21 < 10.00 < 22.90 < 9.53 < 29.30 < 12.10 < 16.30 < 11.50 < 9.03 < 10.80 < 43.60 < 14.00 20120949 MW-114 7/17/2012 < 8.77 < 8.31 < 18.10 < 4.91

• 19.00

• 8.35

• 13.70 < 9.63 < 6.60 < 10.40 < 36.90 < 13.40 20120950 MW-116 7/17/2012 < 7.87 < 7.42 < 10.20 < 6.25

• 17.10 < 7.01

• 11.90

• 8.40 < 5.99 < 8.52 < 28.10 < 12.90 20120951 MW-116 DUP 7/17/2012

• 11.40 < 12.20 < 24.80 < 12.30 < 29.99 < 14.70 < 16.90 < 11.40

• 11.50 < 13.90 < 34.60 < 13.40 20120952 MW-118 7/17/2012 < 9.47 < 6.40 < 11.00 < 6.45

• 17.60 < 9.65 < 12.80 < 7.32 < 7.53 < 7.43 < 26.90

• 12.20 20120953 MW-120 7/17/2012 < 8.51 < 10.80 < 17.90

• 10.70 < 22.80 < 11.20 < 20.10 < 10.30 < 12.80 < 12.10 < 4.11

• 13.60 20120954 MW-122 7/17/2012

• 10.60 < 9.12 < 17.00 < 7.49 < 20.60 < 11.10

• 19.00 < 11.10 < 9.37 < 10.40 < 36.70

• 13.80 20120955 PZ-01 7/17/2012 < 8.94

• 5.66

• 14.00 < 6.28 < 13.70 < 8.46 < 11.30 < 7.97 < 6.91

• 9.44 < 27.20 < 13.20 20120964 MW-128 7/18/2012 < 10.60 < 12.30

• 23.60 < 8.12 < 26.60 < 5.17 < 13.70 < 11.10

• 7.84

• 10.30 < 36.20 < 14.50 20120969 MW-134 7/18/2012 < 13.80 < 10.80 < 19.80

• 11.60

• 24.10 < 12.10 < 19.80 < 14.10 < 10.00

• 11.80 < 45.50 < 10.00 20120970 MW-130 7/18/2012

• 7.90

• 9.75 < 16.30 < 11.40 < 26.30 < 9.87 < 16.80 < 8.75 < 10.70

• 9.54 < 21.00 < 11.30 20121007 MW-132 7/23/2012 < 9.40 < 10.70 < 13.70 < 8.07 < 14.50 < 8.52 < 17.30 < 9.71

• 8.82 < 8.51 < 30.00

• 12.40 20121008 DUP MW-132 7/23/2012 < 13.20 < 12.10 < 28.60 < 13.10 < 24.90 < 14.50 < 23.30 < 11.60 < 11.10 < 13.30 < 48.10 < 14.00

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 82 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 IA-140 20121009 MW-124 7/-3/2012 < 12.50 < 9.69 < 22.10 < 13.20 < 24.70 < 9.98

• 19.20 < 12.40 < 11.10 < 12.60 < 31.50 < 14.90 20121010 MW-124 DUP 7/23/2012 < 8.82 < 7.74 < 22.40

• 7.93 < 21.00 < 9.54

• 15.10 < 9.22 < 9.58 < 12.10 < 33.40 < 14.50 20121011 MW-126 7/23/2012 < 10.50 < 12.00 < 17.30

• 9.56 < 29.40 < 12.90 < 23.30 < 13.20 < 10.30 < 0.80 < 42.00

• 9.52 20121012 MW-126 DUP 7/23/2012 < 12.40 < 14.50 < 22.50 < 12.50 < 26.80 < 10.10 < 15.90 < 9.98 < 12.00 < 11.90 < 40.90 < 3.56 20121061 MW-124 8/7/2012 < 11.20 < 7.49 < 12.20 < 9.05 < 18.90

• 7.82 < 17.20 < 9.49 < 7.79 < 9.62 < 33.00 < 14.90 20121063 MW-126 8/7/2-012

• 9.71 < 7.48 < 26.00 < 3.20 < 24.40 < 11.00 < 22.10 < 11.50 < 10.90 < 12.40

• 56.50

• 4.33 20121067 MW-130 8/7/2012 < 9.35 < 5.33 <- 18.20

• 7.07 < 19.80 < 9.04 < 16.90 < 9.13 < 6.50

• 8.72 < 36.40 < 12.80 20121069 MW-132 8/7/2012 < 7.78 < 7.92 < 19.30 < 8.25 < 16.80 < 8.87 < 13.40 < 7.86 < 8.67 < 8.28 < 28.10 < 10.90 20121071 MW-134 8/7/2012 < 10.00 < 7.23 < 17.80 < 8.79

• 18.20 < 8.92 < 13.50 < 10.40 < 9.52 < 11.10 < 41.50 < 11.80 20121093 MW-137 8/14/2012 < 7.40 < 8.55 < 13.10 < 8.83

• 17.70 < 7.02 < 12.10 < 8.19 < 7.45 < 10.60 < 27.70

• 11.70 20121094 MW-137 DUP 8/14/2012 < 11.60 < 11.90 < 17.50 < 10.40 < 25.90 < 10.80 < 18.60 < 10.80 < 8.11 < 11.20 < 34.80 < 12.00 20121135 MW-15 8/20/2012 < 10.60 < 11.20 < 23.50 < 9.91 < 26.50

• 10.60 < 23.80 < 12.20 < 10.90 < 10.20 < 37.00 < 13.40 20121137 MW-12 8/20/2012 < 8.52 < 6.59 < 12.50 < 8.09 < 13.80 < 6.75 < 15.10 < 7.39 < 7.58 < 8.65

• 32.40 < 14.60

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 83 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121144 MW-16 8/20/2012 < 11.00 < 10.80 < 21.60 < 7.92 < 24.10

• 9.75 < 13.40

• 10.30 < 8.11 < 5.22 < 28.60

• 14.60 20121145 MW-21 8/20/2012 < 9.52 < 10.20 < 20.50 < 9.51 < 12.80 < 9.36

• 18.40 < 8.45 < 9.82 < 11.30 < 29.30

• 14.50 20121146 PZ-2 8/20/2012 < 9.69 < 12.00 < 19.60 < 12.80 < 26.60 < 7.11 < 14.90

• 11.50 < 7.62 < 11.00 < 40.60 < 14.00 20121155 MW-03 8/21/2012 < 11.80 < 11.00 < 14.30 < 10.60 < 23.90 < 10.40 < 14.70

• 9.47 < 9.56 < 8.68 < 21.70 < 14.80 20121156 MW-05 8/21/2012 < 5.65 < 5.63 < 18.20 < 9.65 < 16.50 < 9.82 < 17.50 < 7.32 < 9.61

• 9.33 < 40.50 < 14.50 20121157 MW-01 8/21/2012 < 10.30 < 7.87 < 23.70 < 9.02 < 19.90 < 11.30 < 22.10 < 13.40

• 8.65 < 10.00

• 44.20 < 14.00 20121158 MW-17 8/21/2012 < 12.20 < 11.60 < 22.00 < 7.92 < 17.20 < 11.80 < 19.00 < 10.50

• 7.55 < 14.30 < 40.90 < 13.50 20121159 MW-100 8/21/2012 < 9.04 < 7.69 < 25.60 < 8.72 < 21.20 < 10.80 < 20.10 < 9.08 < 9.41

• 11.20 < 27.00

• 13.90 20121160 PZ-03 8/21/2012 < 10.60 < 10.60 < 26.10 < 11.50

• 21.90 < 11.10 < 15.00 < 12.80 < 8.42 < 11.70

• 34.20

• 14.99 20121161 MW-124 8/21/2012 < 7.98 < 11.50 < 20.00 < 10.60 < 18.00

• 10.70 < 19.20 < 12.20 < 7.83

• 12.50 < 30.20

• 14.30 20121162 MW-126 8/21/2012 < 7.51 < 11.40 < 22.20 < 12.70 < 24.40 < 14.20 < 19.70 < 13.50 < 9.76 < 11.00 < 39.00 < 11.80 20121163 MW-130 8/21/2012 < 9.21 < 7.95 < 13.80 < 9.10 < 21.70 < 8.04 < 13.80 < 7.03 < 8.02 < 8.30 < 34.20

• 10.90 20121164 MW-128 8/21/2012 < 8.10 < 8.96 < 13.30 < 8.52 < 17.80 < 9.83 < 18.10 < 9.43 < 6.72 < 10.50 < 26.00 < 12.90

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 84 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 C0-58 FE-59 CO-60 ZN-65 Nq

'B-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121165 MW-132 8/21/2012 < 5.96 < 6.53 < 10.90 < 5.99 < 12.80 6.71 < 12.80 9.63 < 6.95 < 6.55 < 26.50 < 12.20 20121166 MW-14 8/21/2012 < 8.26 < 9.40 < 14.20 < 7.43 < 12.90 11.50 < 18.50 14.60 < 9.22 < 8.37 < 41.80 < 12.30 20121167 MW-20 8/21/2012 < 10.20 < 10.90 < 15.70 < 12.50 < 14.80 9.81 < 12.70 14.98 < 8.82 < 8.28 < 41.30 < 12.20 20121168 SW-104 8/21/2012 < 7.41 < 9.42 < 10.60 < 8.38 < 16.30 9.02 < 14.70 12.50 < 5.32 < 8.58 < 35.80 < 10.60 20121169 SW-103 8/21/2012 < 7.91 < 8.12 < 18.00 < 8.60 < 16.50 10.40 < 13.40 14.90 < 7.34 < 10.50 < 32.40 < 13.00 20121171 MW-134 8/21/2012 < 7.87 < 8.14 < 15.40 < 7.40 < 15.90 12.10 < 15.80 14.90 < 9.18 < 9.44 < 44.60 < 14.30 20121173 MW-10 8/22/2012 < 4.47 < 4.05 < 10.10 < 4.13 < 9.46. 5.94 < 7.83 12.20 < 3.71 < 4.52 < 27.20 < 10.20 20121174 MW-04 8/22/2012 < 4.87 < 4.38 < 10.80 < 5.18 < 9.93 5.85 < 9.60 13.90 < 4.52 < 4.50 < 29.70 < 11.10 20121175 MW-04 DUP 8/22/2012 < 3.84 < 3.46 < 8.12 < 3.89 < 8.35 4.55 < 7.70 11.80 < 3.93 < 4.11 < 33.10 < 11.10

• < 28.80 * < 11.10 < 12.80 20121176 MW-141 8/22/2012 < 11.10 < 9.50 * < 13.90 < 28.30

• < 21.20 * < 12.50 < 12.50 20121177 MW-141 DUP 8/22/2012 < 8.47 < 11.90 < 7.99 < 8.47 < 25.10 20121178 MW-111 8/22/2012 < 11.00 < 13.30 * < 13.70 < 17.20 * < 28.00 * < 10.90 < 12.50 20121179 MW-111 DUP 8/22/2012 < 10.70 < 12.00 < 29.40 < 7.00 < 29.00 < 24.50 * < 9.84 < 12.00

• - See Section XVI for details

5 River Bend Station 2012 Regulatory Guide 1.21 1 85o Pag LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 C0-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121180 MW-102 8/22/2012 < 9.33 < 12.40 < 23.40 < 7.99 < 29.90 * < 23.70 < 8.86 12.90 *

• 20121181 MW-18 8/22/2012 < 11.40 < 12.80 < 21.10 < 8.95 < 29.30 < 14.60 < 22.80 < 12.40 12.60 20121182 MW-08 8/22/2012 < 14.40 < 14.60 * < 14.10 < 28.70 * < 24.70 < 10.10 12.10 *

• 20121183 MW-19 8/22/2012 < 11.70 < 13.40 * < 10.10 < 21.50 * < 26.30 < 9.37 10.00 *

• 20121184 T-14 8/22/2012 < 11.40 < 14.00 * < 8.94 < 29.30 * < 14.00 < 11.30 11.20 20121185 MW-02 8/222/2012 < 12.10 < 14.80 * < 7.94 < 26.40 * < 28.10 < 11.80 13.00 *

• 20121186 MW-09 8/22/2012 < 10.20 < 12.50 * < 14.20 < 26.20 * < 25.50 < 9.37 9.31 *

• 20121187 MW-06 8/22/2012 < 9.23 < 14.20 * < 11.50 < 21.20 * < 26.70 < 10.60 9.87 20121188 MW-107 8/22/2012 < 10.20 < 12.60 * < 12.90 < 21.50 * < 20.60 < 9.38 10.00 *

• 20121189 MW-107 DUP 8/22/2012 < 14.70 < 10.10 * < 10.30 < 27.20 * < 25.40 < 14.20 12.00 *

• 20121190 MW-104 8/22/2012 < 12.90 < 14.90 * < 11.60 < 28.80 * < 29.30 < 9.18 15.30 20121191 MW-108 8/22/2012 < 11.40 < 14.70 < 27.30 < 8.00 < 21.10 < 11.70 < 18.10 * < 5.59 < 10.90 *

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 86 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121192 MW-139 8/22/2012 < 10.70 < 14.40 < 23.50 < 12.20 < 15.30 * < 23.50 * < 10.10 < 7.02

• 20121193 MW-139 DUP 8/22/2012 * < 11.40 < 21.00 < 8.80 < 23.70 * < 24.70 * < 8.64 < 10.30 20121194 MW-103 8/22/2012 < 13.00 < 11.30 * < 6.84 < 28.70 * < 21.40 * < 12.20 < 11.70 *

• 20121195 MW-103 DUP 8/22/2012 < 10.40 < 13.10 * < 7.95 < 16.30 * < 27.60 * < 10.40 < 12.40 20121196 MW-07 8/22/2012 < 11.90 < 14.90 * < 10.60 < 27.40 < 14.20 < 26.70 * < 5.64 < 10.70 20121197 MW-1I 8/22/2012 < 13.20 < 11.60 * < 10.70 < 29.70 * < 24.50 * < 9.40 < 10.20 20121198 MW-13 8/22/2012 < 12.40 < 14.90 < 29.60 < 6.45 < 24.00 * < 25.50 * < 9.99 < 10.50 20121199 SW-101 8/22/2012 < 10.50 < 15.00 * < 10.10 < 24.70 * < 28.70 * < 10.40 < 10.00 20121352 MW-148 10/1/2012 < 12.10 < 10.60 < 20.70 < 10.10 < 22.80 < 10.30 < 17.50 < 11.10 < 10.80 < 9.27 < 36.80 < 13.70 20121353 MW-148 DUP 10/1/2012 < 12.20 < 8.86 < 13.40 < 12.40 < 20.70 < 9.74 < 21.90 < 10.70 < 8.92 < 7.93 < 34.70 < 13.90 20121363 MW-146 10/2/2012 < 13.80 < 11.50 < 23.30 < 11.70 < 19.80 < 13.60 < 18.80 < 10.60 < 9.13 < 14.30 < 33.40 < 10.10 20121366 MW-144 10/1/2012 < 8.58 < 6.76 < 15.40 < 9.41 < 12.90 < 9.53 < 13.10 < 7.98 < 7.41 < 6.33 < 32.20 < 12.90 20121369 MW-142 10/2/2012 < 8.44 < 8.66 < 12.60 < 8.96 < 18.60 < 8.61 < 12.00 < 8.15 < 8.98 < 7.86 < 37.80 < 11.40 20121372 MW-125 10/3/2012 < 7.70 < 10.10 < 15.80 < 11.30 < 21.20 < 12.50 < 15.60 < 9.79 < 8.71 < 9.79 < 26.60 < 13.70 20121375 MW-139 10/3/2012 < 12.90 < 9.16 < 29.20 < 13.60 < 28.40 < 13.00 < 18.70 < 11.80 < 13.60 < 13.80 < 39.00 < 11.90

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 87 of 91 LLD (pCi/l) 15 15 30 15 30 15 30 15 15 18. 60 15 LAB ID LOCATION DATE MN-54 C0-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121376 MW-141 0/3/2012 < 8.63

• 10.50 < 14.70 < 8.65 < 21.70 < 10.70 < 14.00 < 9.67 < 8.61 < 10.60 < 31.20 < 14.50 20121377 MW-137 0/3/2012 < 12.80

• 7.47 < 19.80 < 9.92 < 24.40 < 11.70 < 15.00 < 11.30 < 11.90 < 13.00 < 33.60

• 14.70 20121421 MW-106 II0/16/2012 < 6.83 < 6.76

• 13.30

• 7.56 < 13.40 < 6.77 < 11.90 < 6.43 < 7.26

• 6.89 < 25.80 < 11.40 20121422 MW-107 0/16/2012 < 9.86 < 7.44 < 20.70 < 7.56

• 29.30

• 11.10

• 19.00

• 9.77 < 10.30 < 10.70 < 31.80 < 12.20 20121423 MW-108 0/16/2012 < 6.44 < 9.70 < 21.40 < 11.30 < 22.50

• 9.05

• 19.90 < 9.55

• 10.10 < 12.10 < 25.60

• 14.00 20121424 MW-104 0/16/2012 < 10.60 < 7.49 < 25.60 < 11.50 < 26.70 < 12.40

• 21.00 < 7.36 < 11.50 < 10.20 < 36.60 < 14.90 20121425 MW-120 110/16/2012 < 12.20 < 11.60 < 23.70

• 11.60 < 24.20 < 12.40

• 21.20 < 14.50 < 11.60 < 11.80

• 51.40 < 3.94 20121426 MW-04 110/16/2012 < 8.25

• 10.80 < 28.10 < 8.26 < 27.30 < 14.10 < 17.40 < 12.10

• 11.30 < 11.10 < 44.00

• 14.70 20121427 MW-02 110/16/2012 < 14.40

• 11.90 < 19.60 < 12.50 < 21.50 < 11.50 < 17.90 < 14.00 < 11.70 < 10.80 < 37.60 < 11.50 20121428 DUP MW-02 110/16/2012 < 6.89 < 7.18 < 15.70

• 7.84 < 19.20 < 6.77 < 15.50 < 9.03 < 6.00 < 8.63 < 27.00 < 11.10 20121429 MW-102 110/16/2012 < 7.07 < 7.09 < 12.50 < 8.69 < 15.20 < 8.92 < 12.30 < 9.92 < 5.16

• 9.43 < 29.10 < 13.50 20121430 DUP-MW-102 10/16/2012

• 8.80 < 8.40 < 23.90 < 9.29 < 14.30 < 9.40

• 15.30 < 9.78 < 8.28 < 8.85

• 30.40 < 11.70 20121431 MW-137 10/16/2012

• 8.82 < 10.40 < 18.30 < 9.02 < 19.90

• 12.00

• 19.80 < 14.00 < 9.61 < 11.30 < 34.60 < 14.10

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 88 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121432 MW-148 10/16/2012 < 10.20 < 7.65 < 19.10 < 9.13 < 22.70 < 12.80 < 20.00 11.30 8.71 < 13.90 < 30.00 < 13.50 20121433 MW-146 10/16/2012 < 8.89 < 9.42 < 15.80 < 9.95 < 27.60 < 8.57 < 12.00 8.75 10.60 < 12.30 < 34.60 < 13.30 20121434 MW-144 10/16/2012 < 11.60 < 8.76 < 20.10 < 2.91 < 24.20 < 12.80 < 16.50 12.50 7.55 < 10.60 < 32.60

• 13.30 20121437 MW-142 10/17/2012 < 11.40 < 7.41 < 19.60 < 11.00 < 21.80 < 14.40

• 16.60 7.31 10.90 < 15.70 < 44.30 < 14.10 20121438 DUP-MW-142 10/17/2012 < 10.60 < 14.60 < 20.30 < 11.00 < 24.40

• 14.20 < 16.80 14.50 10.60 < 13.00 < 47.20

• 11.90 20121439 MW-125 10/17/2012 < 12.20 < 10.90 < 26.20 < 9.99 < 29.20 < 11.60 < 17.60 9.83 10.40 < 13.30

• 35.10 < 12.70 20121440 PZ-03 10/17/2012 < 10.30 < 10.50 < 21.20 < 7.22 < 17.90

• 11.80 < 14.90 14.20 10.00 < 7.41 < 40.00 < 12.80 20121441 MW-100 10/17/2012 < 9.39 < 6.53 < 15.60 < 8.37 < 17.90 < 10.20

• 14.90 13.70 9.24 < 11.70

• 32.20 < 13.20 20121443 MW-128 10/17/2012 < 11.10 < 9.30 < 25.60 < 5.61 < 17.10

• 11.60 < 17.80 9.36 10.70 < 9.08 < 27.00 < 13.70 20121444 MW-130 10/17/2012 < 11.00 < 10.10 < 20.70 < 11.30 < 15.40 < 14.10 < 17.60 14.90 7.26 < 10.00

• 36.00 < 11.60 20121445 MW-132 10/17/2012 < 6.66 < 6.50 < 12.50 < 6.10 < 15.10 < 6.92 < 11.60 11.80 5.57 < 5.90 < 32.60

• 10.90 20121446 MW-134 10/17/2012 < 11.80 < 10.80 < 21.40 < 7.48 < 21.00

• 7.62

• 16.60 12.10 7.20

• 8.83 < 35.80 < 13.00 20121447 SW-101 10/17/2012 < 4.41 < 4.80 < 9.45 < 5.17 < 13.60 < 4.35 < 10.90 < 10.30 < 5.84 < 6.71 < 32.20 < 11.60

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 89 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121448 MW-10 10/17/2012 < 7.62 < 7.09 < 15.70 < 5.47

• 13.20 < 7.56 < 12.40 < 13.00 < 5.62

• 7.98 < 39.40 < 13.50 20121449 MW-06 10/17/2012 < 6.61 < 7.43 < 11.90 < 6.51

• 15.50 < 7.63 < 9.81 < 13.50 < 5.21 < 6.78 < 37.80 < 10.40 20121450 MW-08 10/17/2012 < 5.55 < 6.18 < 10.90 < 6.07

• 10.50

• 7.45 < 11.80 < 14.98 < 6.04

• 6.42 < 39.00 < 9.12 20121451 SW-102 10/17/2012 < 5.39 < 4.69 < 8.85 < 5.07

• 9.58 < 6.32 < 8.96

• 13.70

• 4.18 < 4.51 < 31.20 < 10.30 20121452 MW-18 10/17/2012 < 5.57 < 6.00 < 14.60 < 5.24 < 11.50 < 6.85 < 12.40 < 14.90 < 6.12 < 6.34 < 36.80 < 13.50 20121453 SW-103 10/17/2012 < 5.08 < 4.43 < 11.50 < 4.82 < 10.10 < 6.79 < 8.49 < 12.00 < 5.12 < 6.21 < 33.20

• 13.80 20121454 SW-104 10/17/2012 < 6.34 < 6.53 < 11.60 < 6.23

• 11.60 < 8.38 < 12.80 < 13.80 < 6.49 < 6.10 < 33.60 < 11.50 20121455 MW-19 10/17/2012 < 4.08 < 3.63 < 7.80 < 4.13 < 10.40 < 4.28 < 6.92 < 11.00 < 3.76 < 3.90 < 24.90 < 9.78 20121456 MW-111 10/17/2012 < 6.53 < 7.60 < 15.50 < 8.11

• 17.00 < 8.34 < 14.80 < 11.60 < 6.50 < 7.51 < 28.70

• 10.40 20121457 PZ-02 10/17/2012 < 5.18 < 6.14 < 11.40 < 5.62 < 13.10 < 5.31

• 10.40

• 9.14 < 4.93 < 6.17

• 25.80 < 12.50 20121458 MW-103 10/17/2012 < 7.51 < 7.23 < 15.70 < 6.49

• 16.20 < 9.81 < 18.10

• 13.80 < 5.86 < 8.87 < 35.10

• 14.70 20121459 PZ-01 10/17/2012 < 10.60 < 13.90 < 21.80 < 8.71

• 14.90 < 11.50 < 19.50 < 11.30

• 11.90 < 12.40 < 34.60

• 4.11 20121460 PZ-01-DUP 10/17/2012 < 4.99 < 5.74 < 10.70 < 6.00 < 13.10 < 7.70 < 14.40 < 9.93 < 6.88 < 6.56 < 26.20 < 12.40

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 90 of 91 LLD (pCi/l) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121461 MW-110 10/17/2012 < 10.70 < 14.00 < 21.40 < 12.40 < 20.90 < 14.80 < 16.80 < 10.80

• 9.89 < 11.50 < 39.10 < 14.50 20121462 MW-118 10/17/2012 < 3.90 < 3.91 < 6.90 < 4.24 < 7.25 < 4.81 < 7.05 < 11.60 < 3.14 < 4.36 < 20.70 < 7.68 20121463 MW-114 10/17/2012 < 6.49 < 6.32 < 10.60 < 5.92 < 12.30 < 7.74

• 9.70 < 9.15

• 5.35 < 6.21

• 33.80 < 14.40 20121464 MW-112 10/17/2012 < 8.18 < 8.87 < 12.60 < 6.37 < 16.00

• 8.21 < 16.80 < 13.80 < 7.25 < 8.38 < 32.30

• 12.30 20121465 MW-139 10/17/2012 < 5.59 < 5.72 < 11.30 < 4.08 < 12.10 < 6.65

• 8.87 < 8.63 < 4.80 < 5.13 < 22.90

• 9.76 20121466 MW-124 10/18/2012 < 11.20 < 11.00 < 16.00 < 8.51 < 18.00 < 11.20

• 16.10 < 7.53

• 11.20 < 12.30

• 34.90 < 12.90 20121467 MW-126 10/18/2012 < 10.30 < 5.28 < 4.41 < 7.14 < 17.10 < 11.90 < 16.30

• 10.60 < 10.00

• 12.90

• 30.00 < 11.30 20121476 MW-141 10/18/2012 -C7.52 < 6.93 < 17.40 < 9.01 < 16.90 < 10.10 < 13.60 < 13.30 < 8.09

• 9.12 < 53.50 < 14.80 20121479 MW-122R 10/18/2012 < 6.69 < 8.14 < 10.90 < 6.53 < 13.20 < 7.65 < 12.40 < 13.40 < 6.01 < 6.40 < 27.30

• 12.90 20121683 MW-153 11/21/2012 < 10.30 < 12.60 < 23.00 < 11.70 < 20.00 < 8.62

• 21.80 < 11.10 < 8.06 < 14.40 < 36.80 < 11.30 20121684 DUP MW-153 11/21/2012 < 12.50 < 11.60 < 18.80 < 8.50 < 29.70

• 11.00 < 18.80 < 10.40 < 10.80 < 14.40 < 34.10

• 13.10 20121685 MW-116 11/21/2012 < 11.10 < 11.30 < 22.80 < 10.80 < 26.90 < 13.20 < 22.80 < 11.60 < 10.30 < 12.00 < 40.60 < 14.40 20121785 MW-151 12/8/2012 < 11.50 < 11.80 < 18.60 < 7.65 < 16.30 < 9.53 < 14.50 < 10.40 < 10.70 < 10.10 < 30.60 < 13.20

• - See Section XVI for details

River Bend Station 2012 Regulatory Guide 1.21 Page 91 of 91 LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20121786 DUP-MW-151 12/8/2012 < 9.25 < 6.04 < 15.90 < 6.25 < 15.20 < 8.17 < 12.00 < 10.20 < 8.67 < 9.47 < 35.00 < 12.40 20121809 MW-131 12/11/2012 < 9.11 < 9.69 < 23.60 < 9.93 < 22.90 < 7.93 < 15.60 < 11.00 < 9.05 < 12.60 < 27.30 < 14.50 20121810 MW-131-D 12/11/2012 < 8.68 < 10.50 < 25.60 < 2.89 < 21.80 < 10.00 < 19.60 < 12.20 < 11.50 < 10.20 < 40.70 < 11.10

• - See Section XVI for details