RBG-47025, Radioactive Effluent Release Report for 2009

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Radioactive Effluent Release Report for 2009
ML101241148
Person / Time
Site: River Bend Entergy icon.png
Issue date: 04/30/2010
From: Lorfing D
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RBF1-10-0068, RBG-47025
Download: ML101241148 (56)
v • d • e


Text

Entergy Operations, Inc.

C' River Bend Station 5485 U.S. Highway 61N Entergy-- St. Francisville, LA 70775 Tel 225381 4157 David N. Lorfing Manager-Licensing April 30, 2010 U.S. Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852-2738

Subject:

Radioactive Effluent Release Report for 2009 River Bend Station - Unit 1 License No. NPF-47 Docket No. 50-458 File Nos.: G9.5, G9.25.1.5 RBG-47025 RBF1-10-0068

Dear Sir or Madam,

Enclosed is the River Bend Station (RBS) Annual Radioactive Effluent Release Report for the period January 1, 2009, through December 31, 2009. 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. David Lorfing at (225) 381-4157.

Sincerely, David N. Lorfing DNL/tjb enclosure k4/2!k

Radioactive Effluent Release Report for 2009 Page 2 of 2 cc: U.S. Nuclear Regulatory Commission (w/o Enclosure)

Region IV 612 East Lamar Blvd., Suite 400 Arlington, TX 76011-4125 NRC Resident Inspector (w/o Enclosure)

PO Box 1050 St. Francisville, LA 70775 Mr. Alan B. Wang, Project Manager U.S. Nuclear Regulatory Commission MS 0-8 B1 11555 Rockville Pike Rockville, MD 20852-2738

2009 ANNUAL EFFLUENT RELEASE REPORT PREPARED BY: 3 4z Z Spell / Senior HP/Chem Specialist REVIEWED BY: 0 Robert W. Heath I Manager - Chemivyry REVIEWED BY:

Bradford L. Houston / Radiation Protection Mdnager APPROVED BY: iO / a g n r Eric W. Olson / General Manager Plant Operations

River Bend Station 2009 Regulatory Guide 1.21 Page 2 of 54 TABLE OF CONTENTS PAGE I. INTRODUCTION 4 II. SUPPLEMENTAL INFORMATION A. Regulatory Limits 4 B. Effluent Concentration Limits 7 C. Measurements and Approximations of Total Radioactivity 7 D. Batch Releases 9 E. Abnormal Releases 9 F. Estimate of Total Error 10 III. GASEOUS EFFLUENT

SUMMARY

INFORMATION 10 IV. LIQUID EFFLUENT

SUMMARY

INFORMATION 11 V. SOLID WASTE 11 VI. RADIOLOGICAL IMPACT ON MAN 11 VII. METEOROLOGICAL DATA 11 VIII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY 12 IX. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY 12 X. LIQUID HOLDUP TANKS 12 XI. RADIOLOGICAL ENVIRONMENTAL MONITORING 12 XII. LAND USE CENSUS 12 XIII. OFFSITE DOSE CALCULATION MANUAL (ODCM) 13 XIV. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS AND SOLID WASTE TREATMENT SYSTEMS 13 XV. PROCESS CONTROL PROGRAM (PCP) 13 XVI. INDUSTRY GROUND WATER PROTECTION INITIATIVE (GPI) - FINAL GUIDANCE DOCUMENT OBJECTIVE ANNUAL REPORTING 13

River Bend Station 2009 Regulatory Guide 1.21 Page 3 of 54 TABLES Table 1A Gaseous Effluents - Summation of All Releases 14 Table lB Gaseous Effluents - Ground Releases - Continuous Mode 15 Table 1C Gaseous Effluents - Ground Releases - Batch Mode 17 Table ID Gaseous Effluents - Mixed Mode Releases -

Continuous Mode 18 Table 1E Gaseous Effluent -Batch Mode 20 Table IF Radioactive Gaseous Waste Sampling and Analysis Program 21 Table 1G Gaseous Dose Summary 22 Table 2A Liquid Effluents - Summation of All Releases 23 Table 2B Liquid Effluents - Continuous Mode 24 Table 2C Liquid Effluents- Batch Mode 25 Table 2D Liquid Effluents - Batch Mode 26 Table 2E Radioactive Liquid Waste Sampling and Analysis Program 27 Table 2F Liquid Dose Summary 28 Table 3 Solid Waste and Irradiated Fuel Shipments 29 Table 4 Assumptions/Parameters for Doses to Member of the Public Inside Site Boundary 31 Table 5 Doses to Members of the Public On Site from Gaseous Releases 32 Table 6 Meteorological'Data - Joint Frequericy Tables 33 Table 7 AtmosphericDispersion Factors 42 Table 8 Groundwater Initiative Sample Results 43

River Bend Station 2009 Regulatory Guide 1.21 .Page 4 of 54

1. INTRODUCTION This is the annual Radioactive Effluent Release Report for the period of January 1, 2009, through December 31, 2009. 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 Z Mi (X/Q) QO < 5 mrads/qtr i=1 < 10 mrads/yr DBeta-Air beta air dose from radioactive noble gases in millirad (mrad)

.n 3.17E-8. Ni(X/Q) Qi < 10 mrads/qtr i= 1 < 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 of interest,)

n

= 3.17E-08 (Fo) Pi, (X/Q) Qi and I=l

River Bend Station 2009 Regulatory Guide 1.21 n

3.17E-08 (Fu) = Ri (D/O) Oi and n

DT Y- D8DPX < 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, (DF) D, and n

DTOTALT= Z DiT i1l DTOTAL,= Total dose commitment to the organ (T) 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)

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

River Bend Station 2009 Regulatory Guide 1.21 Page 6 of 541

3. Miscellaneous Limits
a. Technical Requirement 3.11.2.1 - Fission and Activation Gases In accordance with Technical Requirement 3.112.1, 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 K1 (X/Q) Qi <500mrem/yr and DRsKIN= Dose rate to the skin in mrem/yr n

- Y L+1.1Mi (X/Q) QO <3000mrem/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&8DP, = Dose rate to the organ t 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.

n y- Pi (X/Q) Qi

< 1500 mrem/yr i=1 (above terms defined in RBS ODCM)

River Bend Station 2009 Regulatory Guide 1.21 Page 7 of 54

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 IOCFR20, 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 iOCFR20 Appendix B, Table 2, Column 1.
2. Liquid Releases The Effluent Concentration Limits of radioactive materials in liquid effluents are limited to ten times 10CFR20, Appendix B, Table 2, Column 2.

C. Measurements and Approximations of Total Radioactivity

1. Gaseous Effluent
a. Fission and Activation Gases

River Bend Station 2009 Regulatory Guide 1.21 Page 8 of 54 Periodic grab samples are obtained from the Main Plant Exhaust Duct, Fuel Building Exhaust Vent and Radwaste Building Exhaust Vent. These samples are analyzed using high purity germanium detectors coupled to computerized pulse height analyzers. The sampling and analysis frequencies are described in Table iF.

Sampling and analysis of these effluent streams provide noble gas radionuclide relative abundance that can then be applied to the noble gas gross activity and gross activity release rate to obtain nuclide specific activities and release rates. The noble gas gross activity released within a specific time period is determined by integrating the stack monitor release rate over the considered time period. If no activity was detected between the stack grab sample' and a significant increase in hourly averages was recorded, the nuclide relative abundance of the last sample (or the last similar event), which indicated the presence 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 1F. Analysis is performed to identify and quantify radionuclides using high purity germanium detectors coupled to computerized pulse height analyzers. Given the nuclide specific activity concentrations, process flow rate, and duration of the sample, the nuclide specific activity released to the environment can be obtained. Due to the continuous sampling process, it is assumed that the radioactive' material is released to the environment at a constant rate within the sampling period. Strontium-89 and Strontium-90 (Sr-89 and Sr-

90) are quantitatively analyzed by counting by scintillation techniques (Chrenkov 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.

River Bend.Station 2009 Regulatory Guide 1.21 Page 9 of 54 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.

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 (Chrenkov 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.

D. Batch Releases

1. Liquid Effluents Batch releases and receiving stream flow from River Bend Station during the reporting period of January 1, 2009, through December 31, 2009 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, 2009, through December 31, 2009.

E. Abnormal Releases Number of abnormal liquid releases: 0 Number of abnormal gaseous releases: 0

River Bend Station 2009 Regulatory Guide 1.21 Page 10 of 54 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 = I V ((El)" +, (E2)" +.(E)L where:

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

IIl. GASEOUS EFFLUENT

SUMMARY

INFORMATION Refer to the Table I series for "Summation of All Releases and "Nuclides Released,"

respectively. It should be noted that an entry of "0.00E+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.

River Bend Station 2009 Regulatory Guide 1.21 Page I I of 54 IV. LIQUID EFFLUENT

SUMMARY

INFORMATION Refer to the Table 2 series for "Summation of All Releases and Nuclides Released." It should be noted that an entry of "0.OOE+00" Ci of uCi/mI 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.

Organ mrem Total Body 1.11E-01 Skin 1.32E-01 Thyroid 4.19E-01 Other Organ 1.11E-01 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 the lawn service provider.

The lawn service provider dose is conservatively calculated to have performed all work at the Generation Support Building during 2009. The employees staying at RBS during the week are 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 enrage 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 2009 was 99 %.

River Bend Station 2009 Regulatory Guide 1.21 Page 12 of 54 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 January 1, 2009, through December 31, 2009, restored to operable status within the required time, except as noted in the following paragraph.

A review of eSOMS and PCRS revealed that Action E2 was entered once during 2009 for TLCO 3.3.11.2 on RMS-RE107, Radioactive Liquid Effluent Monitoring Instrumentation.

The entry was made because RMS-RE107 (TS-09-1379) (CR RBS-2009-1641) was not restored to operable within the required 14 days. Actions D1 and D2 were entered on March 22, 2009 and as of April 5, 2009, RMS-RE107 had not been restored to service. RMS-*

RE107 was restored to operable on April 13, 2009. No radioactive liquid effluent discharges occurred while RMS-RE107 was inoperable. The reason for failure to restore this component within the required time frame was because after the initial defective part was replaced, additional information was needed to restore RMS-RM107. The additional information was not readily available and required contacting the vendor, manufacturer and industry peers. When this information was obtained at the end of the second week, additional deficiencies postponed the completion of the work. The unit could not reestablish communications and additional troubleshooting was required.

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, 2009, through December 31, 2009, 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, 2009, through December 31, 2009 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 duiing the reporting period January 1, 2009, through December 31, 2009.

XII. LAND USE CENSUS The Land Use Census was not conducted in 2009. The next scheduled land use census as

River Bend Station 2009 Regulatory Guide 1.21 Page 13 of 54 required by-Technical Requirements Manual (TRM) (TR 3.12.2) is in 2010.

XIII. OFFSITE DOSE CALCULATION MANUAL (ODCM)

There were no changes to the ODCM in 2009.

XIV. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS Engineering has performed a review of the eB and Asset Suite databases to evaluate non-administrative design changes completed or partially completed during 2009 involving the subject systems (i.e. changes classified as evaluations or nuclear changes). These design changes were then reviewed to determine if there were any major changes to the subject systems. The review was based on a major change being defined as a modification which affected the method of processing or the effluent from the system. Also, to be a "major change," the change must have affected the Updated Safety Analysis Report.

No engineering change 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 liquid, solid or gaseous radwaste treatment systems.

XV. PROCESS CONTROL PROGRAM (PCP)

There were no changes to the PCP in 2009.

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 REMP program. There have been no positive groundwater samples since the NEI groundwater monitoring sampling began in the third quarter 2007.

The Minimum Detectable Activity (MDA) in all samples taken in support of the GPI is less than the Lower Limit of Detection as required in Technical Requirement 3.12.1 (Environmental LLDs). The sample results are located in Table 8.

River Bend Staition 2009 Regu!atory Guide 1.21 . Page 14 o1".54 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 8.41E+00 3. 20E+01 3.49E+01 2.39E+01 9. 92E+01
2. Avg. Release Rate uCi/sec 1.08E+00 4. 07E+00 4 . 39E+00 3.00E+00 3.15E+00
3.  % Applicable Limit  % (1) 8.48E-02 7. 96E-01 4.31E-01 2.05E-01 7. 59E-01 Iodine-131
1. Total Release Ci 1. 14E-03 2. 55E-03 3.43E-03 5. 63E-04 7.68E-03
2. Avg. Release Rate uCi/sec 1.47E-04 3.24E-04 4.32E-04 7. 08E-05 2.44E-04
3.  % Applicable Limit  % (2) 4. 86E-01 1. 09E+00 1. 51E+00 2.51E-01 1. 67E+00 Particulates Half Life >= 8 days
1. Total Release Ci 5.13E-04 8 . 62E-04 8. 7 1E-04 2 .4 1E-04 2.49E-03
2. Avg. Release Rate uCi/sec 6.60E-05 1. 10E-04 1 .10E-04 3.03E-05 7.89E-05
3.  % Applicable Limit  % (2) 1. 17E-01 2.70E-01 3. 58E-01 6.70E-02 4.06E-01 Tritium
l. Total Release Ci 4.55E+00 4. 29E+00 4. 91E+00 3. 66E+00 1. 74E+01
2. Avg. Release Rate uCi/sec 5.85E-01 5. 45E-01 6. 17E-01 4.60E-01 5. 52E-01
3.  % Applicable Limit  % (2) 1.28E-01 1.16E-01 1. 15E-01 1.26E-01 2.41E-01 Gross Alpha Radioactivity
1. Total Release Ci 0. OOE+00 0. 00E+00 0 .00E+00 0.OOE+00 0 . OOE+00
2. Avg. Release'Rate uCi/sec 0. OOE+00 0. 00E+00 0.OOE+00 0. OOE+00 0. OOE+00
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 2009 Regulatory Guide 1.21 P~age 15 of 54 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1B GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE REPORT FOR 2009 Unitts QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gase *s XE-133 Ci 5.76E-02 0 .OOE+00 2.69E-01 1.72E-01 4 .99E-01 XE-133M4 Ci 0.00E+00 0 .OOE+00 0 .'00E+00 0 . OOE+00 0 . OOE+00 XE-135 Ci 4.99E-01 5 .36E+00 2. 11E+00 1.01E-01 8. 07E+00 XE-135M Ci 3. 13E-01 4 . 50E+00 1 .78E+00 8.51E-02 6.68E+00 Totals for Period... Ci 8.70E-01 9. 86E+00 4. 16E+00 3.59E-01 1.52E+01 Iodines 1-131 Ci 00.OOE+00 1 . 39E-05 5. 26E-05 1. 15E-05 7 .80E-05 1-133 Ci 0.OOE+00 1. 19E-04 2.40E-04 0.OOE+00 3.58E-04 Totals for Period... Ci 0 . 00E+00 1.33E-04 2.92E-04 1. 15E-05 4.36E-04 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 1. 70E-05 7. 98E-06 2.50E-05 CR-51 Ci 0 . OOE+00 0. OOE+00 0 . OOE+00 0. OOE+00 0.0oE+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 0.0 E+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 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 3.01E-08 4. 87E-06 0 . OOE+00 4.90E-06 ZN-65 Ci 0 . OOE+00 0 . OOE+00 0 . OOE+00 0. 00E+00 0. OOE+00 Totals for Period... Ci 0.OOE+00 3.01E-08 2.19E-05 7.98E-06 2. 99E-05 Tritium H-3 Ci 1. 69E+00 1.52E+00 1. 45E+00 1.73E+00 6.39E+00 Totals for Period... Ci 1.69E+00 1.52E+00 1.45E+00 1. 73E+00 6. 39E+00

River Bend Station 2009 Regulatory Guide 1.21 Page 16 of 54 Gross Alpha Radioactivity

    • No Nuclide Activities **

GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE REPORT FOR 2009 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. 00E+00 0 .OOE+00 0.0 OOE+00 0 .OE+00 0. OOE+00 1-133 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 Particulates Half Life >= 8 day-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 o.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0. 00E+00 ZN-65 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0 . 00E+06 Totals for Period... Ci 0.OOE+00 0. 00E+06 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 Gross Alpha Radioactivity

    • No Nuclide Activities **

River Bend Station 2009 Regulatory Guide 1.21 Page 18 o'(54 EFFLUENT AND WASTE DISPOSAL REPORT TABLE ID GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE REPORT FOR 2009 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 0..OOE+00 0 OOE+00 0 .OOE+00 2. 94E+00 2. 94E+00 KR-87 Ci 0. OOE+00 0 OOE+00 0 .OOE+00 5.75E-01 5. 75E-01 KR-88 Ci 0. OOE+00 0 OOE+00' 0. OOE+00 1.95E-01 1 .95E-01 XE-131M Ci 0. OOE+00 0. OOE+00 0 .OOE+00 0. OOE+00 0 .OOE+00 XE-133 Ci 2.14E-02 2 80E-01 1. 03E+00 3 .41E+00 4. 74E+00 XE-133M Ci 0 . OOE+00 0 OOE+00 0 . 00E+00 0. OOE+00 0. OOE+00 XE-135 Ci 7 . 43E+00 1.21E+01 1.61E+01 2 .82E+00 3. 85E+01 XE-135M Ci 9 .44E-02 9 .82E+00 1.35E+01 2. 55E+00 2 .60E+01 XE-137 Ci 0 . OOE+00 0 OOE+00 0. OOE+00 4 .72E+00 4 72E+00 XE-138 Ci 0. OOE+00 0 OOE+00 0. OOE+00 6.32E+00 6. 32E+00 Totals for Period... Ci 7.54E+0o 2.22E+01 3.07E+01 2.35E+01 8.40E+01 Iodines 1-131 Ci 1. 14E-03 2.53E-03 3. 38E-03 5.52E-04 7 .60E-03 1-132 Ci 0 . OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 1-133 Ci 1.01E-02 2.23E-02 2.84E-02 4. 87E-03 6.56E-02 1-135 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Totals for Period... Ci 1. 13E-02 2 .48E-02 3.17E-02 5.42E-03 7.32E-02 Particulates Half Life >= 8 days BA-140 Ci 2.82E-04 4 .7 1E-04 5. 45E-04 7.62E-05 1.37E-03 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. 00E+00 0.OOE+00 CO-58 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0.00E+00 0. OOE+00 CO-60 Ci 0. OOE+00 2 .40E-05 0..0OE+00 4.31E-05 6.71E-05 CR-5i Ci 0. OOE+00 0. OOE+00 0 . OOE+00 0. OOE+00 0. 00E+00

River Bend Station 2009 Regulatory Guide 1.21 Page 19 of 54 CS-134 Ci 0.00E+00 0.OOE+00 0.OOE+00 0. 00E+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. 00E+00 0. OOE+00 RU-103 Ci 0.00E+00 0.OOE+00 0.OOE+00 0 .00E+00 0.OOE+00 SR-89 Ci 2.31E-04 3.68E-04 3.04E-04 1. 13E-04. 1.02E-03 SR-90 Ci 0.OOE+00 0.OOE+00 O.OOE+00 7.32E-07 7.32E-07 ZN-65 Ci 0.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 Totals for Period ... Ci 5.13E-04 8.62E-04 8.49E-04 2.33E-04 2.46E-03 Tritium H-3 Ci 2.86E+00 2.76E+00 3. 46E+00 1.93E+00 1.10E+01 Totals for Period... Ci 2.86E+00 2.76E+00 3. 46E+00 1.93E+00 1.10E+01 Gross Alpha Radioactivity

    • No Nuclide Activities **

River Bend Station 2009 Regulatory Guide 1.21 P1age 2(0 of 54, EFFLUENT AND WASTE DISPOSAL.REPORT SUPPLEMENTAL INFORMATION GASEOUS EFFLUENTS - BATCH MODE TABLE lE REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 0 0 0 0 Total release time minutes 0.00E+00 O.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 O.00E+00 Minimum release time minutes 0.OOE+00 0.00E+00 0.OOE+00 0.00E+00 0.OOE+00

River Bend Station 2009 Regulatory Guide 1.21 Page 21 of 54 I TABLE IF Effluent and Waste Disposal Annual Report 2009 Year RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM Gaseous Release Type Sampling Minimum Analysis Type of Activity Lower Limit of Frequency Frequency Analysis Detection (LLD) uCi/ml A. Main Plant M M Principal Gamma Exhaust Duct Grab Sample Emitters 1.OOE-04 H-3 1.00E-06 B. Fuel Building M M Principal Gamma Ventilation Grab Sample Emitters 1.OOE-04, Exhaust Duct "

H-3 1.00E-06 C. Radwaste M M Principal Gamma Building Grab Sample " Emitters 1.OOE-04 Ventilation Exhaust Duct D. All Release Continuous W 1-131 1.00E-12 Types as listed Charcoal Sample in A, B, & C above 1-133 1.00E-10 Continuous W Principal Gamma Particulate Sample Emitters (1-131, 1.00E-11 Others)

Continuous M Gross Alpha Composite 1.OOE-11 Particulate Sample Continuous Q Sr-89, Sr-90 Composite 1.00E-11, Particulate Sample Continuous Noble Gas Monitor Noble Gases Gross Beta or Gamma 1.OOE-06 W = At least once per 7 days M = At least once per 31 days Q = At least once per 92 days

River Bend Station 2009 Regulatory Guide 1.21 Page 2_2of 54 Table IG GASEOUS DOSE

SUMMARY

I&P DOSE LIMIT ANALYSIS ----------

Age Dose Limit Max % of Period-Limit Group Organ (mrem) (mrem) Limit Q1 - T.Spec Any Organ CHILD THYROID 5.48E-02 7.50E+00 7.30E-01 Q2 - T.Spec Any Organ CHILD THYROID 1.1lE-01 7.50E+00 1.48E+00 Q3 - T.Spec Any Organ CHILD THYROID 1.49E-01 7.50E+00 1.98E+00 Q4 - T.Spec Any Organ CHILD THYROID 3.33E-02 7.50E+00 4.44E-01 Yr - T.Spec Any Organ CHILD THYROID 3.48E-01 1.50E+01 2.32E+00 NOBLE GAS DOSE LIMIT ANALYSIS Dose Limit  % of Period-Limit (mrad) (mrad) Limit Q1 - T.Spec Gamma 4.24E-03 5.OOE+00 8.48E-02 Q2 - T.Spec Gamma 3.98E-02 5'OOE+00 7.96E-01 Q3 - T.Spec Gamma 2.16E-02 5.OOE+00 4.31E-01, Q4 - T.Spec Gamma 1.02E-02 5.OOE+00 2.05E-01, Yr - T.Spec Gamma 7.59E-02 1.QOE+01 7.59E-01 Q1 T. Spec Beta 3 .96E-03 1.OOE+01 3.96E-02 Q2 T. Spec Beta 2.59E-02 1.OOE+01 2.59E-01 Q3 T.Spec Beta 1.44E-02 1.OOE+01 1.44E-01 Q4 T.Spec Beta 1. 27E-02 1.OOE+01 1.27E-01 Yr T. Spec Beta 5. 70E-02 2.0 0E+O1 2.85E-01

River Bend Station 2009 Regulatory Guide 1.21 flage 23 of 5,4 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 *QTR 4 YEAR Fission and Activation

1. Total Release Ci 0. OOE+00 2.46E-04 4.57E-04 4.39E-04 1. 14E-03
2. Avg. Diluted Conc. uCi/ml 0. OOE+00 1.69E-10 3.40E-10 3.83E-10 2. 13E-10
3.  % Applicable Limit  % (1) 0. OOE+00 9.52E-05 2.15E-04 3.06E-04 3.05E-04 Tritium
1. Total Release Ci 0.OOE+00 1. 68E+01 2.73E+01 4.98E+00 4.91E+01
2. Avg. Diluted Conc. uCi/ml 0.OOE+00 1. 15E-05 2. 04E-05 4.34E-06 9. 17E-06
3.  % Applicable Limit  % (1) 0.OOE+00 2. 37E-04 9 .21E-04 4.38E-05 3.47E-04 Dissolved and Entrained Gases
1. Total Release Ci 0. OOE+00 1.29E-02 4.37E-02 1.33E-03 5. 80E-02
2. Avg. Diluted Conc. uCi/ml 0 .OOE+00 8.88E-09 3.26E-08 1. 16E-09 1.08E-08
3.  % Applicable Limit % (2) 0. OOE+00 4.45E-03 1.63E-02 5.78E-04 5.42E-03 Gross Alpha Radioactivity
1. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 0-.00E+00 0.OOE+00 Volume of liquid waste liters 0 . OOE+00 1.35E+06 3 .07E+06 6. 16E+05 5. 04E+06 Volume of dil. water liters 1.41E+09 1.45E+09 1.34E+09 I.:15E+09 5.35E+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 2009 Regulatory Guide 1.21 Page 24 of 5-4, EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE REPORT FOR 2009 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 2009 Regulatory Guide 1.21 Page 25 of 54 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2C LIQUID EFFLUENTS - BATCH MODE REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases CO-60 Ci 0. OOE+00 2.41E-04 3. 98E-04 2 . 95E-04 9.34E-04 LA-140 Ci 0. OOE+00 0. OOE+00 3 .86E-05 8.40E-06 4.70E-05 MN-54 Ci 0. OOE+00 5. 49E-06 0 OOE+00 1.72E-05 2.27E-05 MO-99 Ci 0. OOE+00 0. OOE+00 4 24E-06 0. OOE+00 4.24E-06 NB-97 Ci 0. OOE+00 0 . OOE+00 8. OOE-06 0.06E+00 8.OOE-06 TC-99M Ci 0.OOE+00 0 . OOE+00 4. 63E-06 0. OOE+00 4.63E-06 ZN-65 Ci 0. 00E+00 0. OOE+00 0 OOE+00 1. 18E-04 1. 18E-04 ZR-97 Ci 0. OOE+00 0. OOE+00 2.94E-06 0.0,E+00 2.94E-06 Totals for Period... 0 . OOE+00 2.46E-04 4 . 57E-04 4 . 39E-04 1. 14E-03 Tritium Ci H-3 0. OOE+00 1. 68E+01 2 .73E+01 4.98E+00 4. 91E+01 Ci Totals for Period... 0. OOE+00 1. 68E+01 2.73E+01 4.98E+00 4.91E+01 Dissolved and Entrained Gases XE-133 Ci 0. OOE+00 3.59E-03 1.42E-02 3.94E-04 1. 82E-02 XE-133M Ci 0. OOE+00 7 .65E-05 1. 80E-04 0.OOE+00 2. 56E-04 XE-135 Ci 0. OOE+00 9.26E-03 2.94E-02 9.34E-04 3 .96E-02 Totals for Period... Ci 0. OOE+00 1.29E-02 4.37E-02 1.33E-03 5.80E-02 Gross Alpha Radioactivity

    • No Nuclide Activities' **

River Bend Station 2009 Regulatory Guide 1.21 Page 26 of 54 EFFLUENT AND WASTE DISPOSAL REPORT SUPPLEMENTAL INFORMATION LIQUID EFFLUENTS - BATCH MODE TABLE 2D REPORT FOR 2009 UJnits QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 24 57 12 93 Total release time 11I iinutes O.OOE+00 8.85E+03 1.98E+'0 4 4.41E+03 3.31E+04 rIiainutes 0.OOE+00 5.74E+02 4.43E+402 3.90E+02 5.74E+02 Maximum release time Average release time rnminutes 0.OOE+00 3.69E+02 3.48E+ 3. 68E+02 3. 56E+02 Minimum release time ainutes 0.OOE+00 3.25E+02 8.70E+l 3.35E+02 8.70E+01

  • OTR 1 OTR9 2 OTR3 QTR4 3

Average Mississippi ft /sec 548,522 907,066 398,804 734,452 River stream flow during periods of release of effluent into a flowing stream

River Bend Station 2009 Regulatory Guide 1.21 P'age 27 of 54 TABLE2E Effluent and Waste Disposal Annual Report 2009 Year RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM Liquid Release Type Sampling Minimum Analysis Type of Activity Lower Limit of Frequency Frequency Analysis Detection (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 1.00E-05 (Gamma Emitters)

P M H-3 1.00E-05 Each Batch Composite Gross Alpha 1.00E-07 P Q Sr-89, Sr-90 5.OOE-08 Each Batch Composite Fe-55 1.00E-06 P = Prior to each radioactive release M = At least once per 3 t days Q = At least once per 92 days

River Bend Station 2009 Regulatory Guide 1.21 Page 28 of 54 Table 2F LIQUID DOSE

SUMMARY

Report for: 2009 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 5.0 0E+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 8.32E-06 5 OOE+00 1.66E-04 Qtr 2 - T.Spec Total Body ADULT TBODY 3.95E-06 1.50E+00 2.64E-04 Qtr 3 - T.Spec Any Organ ADULT GILLI 2.45E-05 5.0 0E+00 4.91E-04 Qtr 3 - T.Spec Total Body ADULT TBODY 1.46E-05 1.50E+00 9.71E-04 Qtr 4 T.Spec Any Organ ADULT GILLI 1. 38E-05 5. OOE+00 2.76E-04 Qtr 4 - T.Spec Total Body ADULT TBODY 5.25E-06 1. 50E+00 3.50E-04 2009 - T.Spec Any Organ ADULT GILLI 4. 09E-05 1.OOE+01 4 .09E-04 2009 - T.Spec Total Body ADULT TBODY 1.85E-05 3. OOE+00 6.18E-04

River Bend Station 2009 Regulatory Guide 1.21 Palge 29 of' 54 TABLE 3 Effluent and Waste Disposal Annual Report 2009 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/09 to 12/31/09 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 6. 59E+01 A +/- 25%

Sludges, Evaporator Ci 7.51E+01 A Bottoms, Etc.

Dry Compressible Wastes, m3 5.06E+02 A +/- 25%

Contaminated Equipment Ci 4.71E+00 A Etc.

Irradiated Components, m3 0.00E+00 Control Rods, Etc. Ci O.OOE+00 Other m3 2.91E+01 A +/- 25.%

(Water, EHC, Waste Oil, Ci 3.74E-02 A etc.)

I

River Bend Station 2009 Regulatory Guide 1.21 Page 30 of 54 Effluent and Waste Disposal Annual Report 2009 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/09 to 12/31/09 Table 3 (continued)

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 C-14 1.665 1.25E+00 MN-54 2.366 1.lE-01 MN-54 2.367 8.84E-04 MN-54 1.878 1.41E+00 FE-55 71.471 3.37E+00 FE-55 71.472 2.67E-02 FE-55 13.934 1.05E+01 CO-60 22.603 1.07E+00 CO-60 22.601 8.45E-03 CO-60 55.577 4.18E+01 CS-137 1.086 5.12E-02 CS-137 1.086 4.06E-04 NI-63 11.131 8.36E+00 ZN-65 6.914 5.19E+00 SR-90 1.328 9.98E-01 CS-134 1.016 7.64E-01 CS-137 5.384 4.04E+00 No Control Rods, Etc. were shipped in 2009

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 17 Truck Energy Solutions (Bear Creek)- Oak Ridge, TN 13 Truck Energy Solutions (Gallaher)-Oak Ridge, TN 2 Truck Clive Disposal Facility (Containerized) - Clive, UT B. Irradiated Fuel Shipments Disposition Number of Shipments Mode of. Transportation Destination 0 N/A N/A

River Bend Station 2009 Regulatory Guide 1.21 Page 31 of 54 TABLE 4 Effluent and Waste Disposal Annual Report 2009 Year ASSUMPTIONS/PARAMETERS FOR DOSES TO A MEMBER OF THE PUBLIC INSIDE SITE BOUNDARY MEMBER OF LOCATION DISTANCE"' SECTOR DURATION THE PUBLIC METERS (HR/YEAR)(2 1 People Entering Site Without Alligator Bayou 2500 SW 40 Consent Lawn Service General Services 115 ENE 292 Provider Building National Guard Activity Center 994 WNW 0(3)

Delivery Driver Main Warehouse 275 N 125 Workers staying Activity Center 994 WNW 2400(4) onsite Trailer City (1) The approximate distances from main plant vent exhaust to location.

(2) Liquid pathways dose 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 2009.

(4) Workers began staying at the Activity Center Trailer City beginning April 10, 2007 and have been permitted to stay long term. During refueling outages additional workers were on site for about 60 days. The long term indivduals will be the receptors for this pathway. For 2009, this 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.

River Bend Station 2009 Regulatory Guide 1.21 Page 32 of 54 TABLE 5 DOSES TO MEMBERS OF THE PUBLIC ON SITE FROM GASEOUS RELEASES 2009 Critical Total Skin Dose Annual Organ Body Dose Annual Duration Dose Annual (mrem) Factor Annual (mrem)

(mrem)

Alligator Bayou 1.28E-04 3.29E-05 6.10E-05 4.57E-03 Lawn Service 1.62E-01 3.21E-02 5.83E-02 3.33E-02 Provider Workers staying 1.11E-02 1.95E-02 3.55E-02 2.74E-01 onsite Delivery 1.94E-02 4.36E-03 8.02E-03 1.43E-02 Driver

River Bend Station 2009 Regulatory Guide 1.21 Page 33 of 54 Table 6 Effluent and Waste 'Disposal Annual Report 2009 Year Meteorological Data - Joint Frequency Tables

River Bend Station 2009 Regulatory Guide 1.21 Page 34 ot'54 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/01/09 0:00 TO 3/31/09 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.i-" 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 6 7 1.0 35 47 64 39 1 0 0 0 0 209 NNE 7 12 14 26 40 48- 5 0 0- 0 0 0 152 NE 8 6 12 23 51 47 1 0 0 0 0 0 148 ENE 3 13 8 16 12 19 2 0 0 0 0 0 73 E 2 9 14 19 15 4 0 0 0 0 0 0 63 ESE 2 12 26 74 40 17 0 0 0 0 0 0 171 SE 3 4 19 59 75 63 15 1 0 0 0 0 239 SSE 1 6 4 18 32 73 73 8 0 0 0 0 215 S 2 5 7 22 38 77 80 5. 0 0 0 0 236 SSW 5 2 3 6 14 20 39 3 0 0 0 0 92 SW 5 6 1 11 5 13 12 1 0 0 0 0 54 WSW 1 4 *6 12 9 25 9 0 0 0 0 0 66 W

1 5 7 17 15 12 11 0 0 0 0 0 68 WNW 4 7 10 16 7 17 9 0. 0 0 0 0 70 NW 2 14 9 18 11 17 21 2 .0 0 0 0 94 NNW 3 11 8 23 21 40 50 7 0 0 0 0 163 TOTAL 55 123 158 395 432 556 . 366 28 0 0 0 '0 2113 NUMBER OF CALMS:. 8 NUMBER OF INVALID HOURS: 39 NUMBER OF'VALIDHOURS: 2121 TOTAL HOURS FOR THE PERIOD: 2160

River 13end Station 2009 Regulatory Guide 1.21 Page 35 of 54 RIVER BEND STATION JOINT FREQUENCY TABLE.

ALL STABILITY CLASSES FROM 1/01/09 0:00 TO 3/31/09 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 1 3 4 12 57 89 11 0 0 0 0 177

.NNE 1 2 1 5 7 76 90 2 0 0 0 0 184 NE 0 0 2 3 9 29 71 8 .0 0 0 0 122 ENE 0 1 1 4 6 15 40 7 0 .0 0 0 74 E 0 0 0 3 9 17 34 16 0 0 0 0 79 ESE 0 0 0 4 10 38 161 39 0 0 0 0 252 SE 0 0 1 5 4 22 102 25 0 0 0 0 159 SSE 0 2 0 3 2 24 123 39 6 0 0 0 199 S 0 0 0 4 7 42 135 41 3 0 0 0 232 SSW 0 0 0 2 9 22 58 22 2 -0 0 0 115 SW 0 0 0 3 6 19 21 7 0 0 0 0 56 WSW 0 0 3 4 5 32 42 4 2 0 0 0 92 W 0 2 0 3 11 21 22 7 1 0 0 0 67 WNW 0 1 0' 9 4 14 31 9 1 0 0 0 69 NW 1 0 0 8 8 19 35 23 3 0 0 0 97 NNW 1 .1 1 3 3 37 63 30 7 0 0 0 146 r

TOTAL 3 10 12 67 112 484 1117 290 25 0 0 0 2120 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 39 NUMBER OF VALID HOURS: 2121 TOTAL HOURS FOR THE PERIOD: 2160

River Bend Station 2009 Regulatory Guide 1.21 Page 36 of .54 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 4/01/09 0:00 TO 6/30/09 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 18 15 13 32 23 27 9 1 0 0 0 0 138 NNE 7 7 8 31 16 24 3 0 0 0 0 0 96 NE 11 5 4 24 28 33 2 0 0 0 0 0 107 ENE 9 14 6 10 7 8 2 0 0 0 0 0 56 E 7 8 10 5 8 3 0 0 0 0. 0 0 41 ESE 8 12 15 15 9 10 1 0 0 0 0 0 70 SE 4 7 26 62 39 49 19 0 0 0 0 0 206 SSE 4 6 13 49 36 47 42 4 0 0 0 0 201 S 4 4 11 37 60 105 89 3 0 0 0 0 313 SSW 5 6 23 46 33 44 14 0 0 0 0 0 171 SW 4 6 13 25 24 32 6 0 0 0 0 0 110 WSW 6 .6 10 15 17 43 7 0 0 0 0 0 104 W 8 8 10 i8 16 49 8 0 0 0 0 0 117 WNW 11 20 7 32 16 41 1 3 0 0 .0 0 131 NW 13 30 11 18 17 32 32 1 0 0 0 0 154 NNW 21 27 14 11 17 28 11 1 0 0 0 0 130 TOTAL 140 181 194 430 366 575 246 13 0 0 0 0 2145 NUMBER OF CALMS: 39 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2184 TOTAL HOURS FOR THE PERIOD: 2184

River Bend Station 2009 Regulatory Guide 1.21 Page 37 of 54 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 4/01/09 0:00 TO 6/30/09 23:00 PRIMARY SENSORS.- 150 FOOT WIND SPEED (METERS/SECOND)

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

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 0 1 3 6 29 30 2 0 0 0 0 72 NNE 0 0 1 4 16 33 52 0 0 0 0 0 106 NE 1 0 0 2 6 17 80 14 1 0 0 0 121 ENE 0 2 1. 2 8 15 24 19 1 0 0 0 72 E 0 0 1 3 6 12 24 5 3 0 0 0 5.4 ESE 1 1 1 5 6 33 120 24 12 0 0 0 '203 SE 1 1 3 5 13 42 62 18 3 0 0 0 148 SSE 0 0 3 9 13 49 63 23 3 0 0 0 .163 S 0 3 1 8 14 90 173 34 0 0 0 0 323 SSW 0 1 0 9 19 87 71 6 0 0 0 0 193 SW 0 0 2 15 15 74 32 3 0 0 0 0 141 WSW 1 1 2 7 19 55 36 5 0 0 0 0 126 W 0 1 4 10 16 75 51 4 1 0 0 0 162 WNW 0 1 2 .9 10 29 33 15 4 0 0 0 103 NW 0 0. 0 4 2 33 48 '21 1 0 0 0 109 NNW 0 0 3 5 7 31 37 3 1 1 0 0 88 TOTAL 5 11 25 100 176 704 936 196 30 1 0 0 2184 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2184 TOTAL HOURS FOR THE PERIOD: 2184

River Bend Station 2009 Regulatory Guide 1.21 Plage 38'of 54 RIVER 'BEND STATION JOINT.FREQUENCY TABLE ALL STABILITY CLASSES FROM 7/01/09 0:00 TO 9/30/09 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 23 17 25 27 25 20 1 0 0 0 0 0 138 NNE 16 15 30 34 21 6 0 0 -0 0 0 0 122 NE 24 13 21 .36 18 11 0 0 0 0 0 0 123 ENE 15 11 23 23 11 5 1 0 0 0 0 0 89 E 13 16 20 22' 5 1 1 0 0 0 0 0 78 ESE 9. 19 16 15 7 2 0 0 0 0 0 0 68 SE 14 22 36 42 30 12 2 0 0 0 0 0 158 SSE 9 9 31 41 26 35 8 0 0 0 0 0 159 S 6 10 19 43 36 32 18 1 0 0 0 0 165 SSW 9 11 17 46 32 37 11 0 0 0 0 0 163 SW 10 12 18 31 32 22 3 0 0 0 0 0 128 WSW 7 14 16 24 29 35 5 0 0 0 0 0 130 W 11 20 14 22 23 49 7 0 0 0 0 0 146 WNW 19 23 13 33 34 40 9 0 0 0 0 0 171 NW 22 22 18 20 18 18 4 0 0 0 0 0 122 NNW 29 21 17 25 16 25 4 0 0 0 0 0 137 TOTAL 236 255 334 484 363 350 74 1 0 0 0 0 2097 NUMBER OF CALMS: 57 NUMBER OF INVALID HOURS: 54 NUMBER OF VALID HOURS: 2154 TOTAL HOURS FOR THE PERIOD: 2208

River Bend Station 2009 Regulatory Guide 1.21 Page 39 of 54 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 7/01/09 0:00 TO 9/30/09 23:00 C

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 1 6 8 16 43 32 0 0 0 0 0 106 NNE 0 3 3 12 19 52 37 0 0 0 0 0 126 NE 0 1 4 13 23. 61 74 3 0 0 0 .0 179 ENE 2 1 7 14 30 29 40 7 2 0 0 0 .132 E 2 3 3 18 25 31 17 1 2 0 0 0 102 ESE 1 2 7 18 17 59 69 8 0 0 0 0 181 SE 0 4 5 10 18 42 34 1 0 0 0 0 114 SSE 2 1. 5 20 26 57 36 3 0 0 0 0 150 S 0 0 .5. 16 28 82 62 6 1 0 0 0 200 SSW 0 1 5 12 25 73 32 5 0 0 0 0 153 SW 1 1 6 i9 31 62 33 0 0 0 0 0 153 WSW 2 2 3 14 29 91 29 1 0 0 0 0 171 W 1 4 5 13 . 24 63 49 1 1 0 .0 .0 161 WNW 0 5 2 5 13 29 14 3 0 0 0 0 71 NW 1 0 0 11 18 22 16 3 0 0 0 0 71 NNW 2 0 0 7 11 30 29 1 1 0 0 0 81 TOTAL 14 29 66 210 353 826 603 43 7 0 0 0 2151 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 54 NUMBER OF VALID HOURS: 2154 TOTAL HOURS FOR THE PERIOD: 2208

River Bend Station 2009 Regulatory Guide 1.21 Page 40 of 54 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 10/01/09 0:00 TO 12/31/09 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 13 15 28 39 35 71 43 2 0 0 0 0 246 NNE 15 16 22 31 41 42 2 0 0 0 0 0 169 NE 15 15 18 34 44 50 5 0 0 0 0 0 181 ENE 23 *29 35 26 20 26 4 0 0 0 0 0 163 E 9 28 28 37 16 7 0 0 0 0 0 0 125 ESE 6 21 26 28 28 19 0 0 0 0 0 0 128 SE 6 16 15 37 53 59 17 0 0 0 0 0 203 SSE 4 14 12 25 40 38 33 2 0 0 0 0 168 S 5 3 4 16 24 *28 19 2 0 0 0 0 101 SSW 3 3 12 9 4 20 9 4 0 -0 0 0 64 SW 6 5 6 15 11 12 5 0 0 0 0 0 60 WSW 3 4 9 10 8 9 7 0 0 0 0 0 50 W 4 5 14 11 8 11 9 0 0 0 0 0 62 WNW 9 .11 17 16 9 27 14 0 0 0 0 0 103 NW 10 16 13 .19 23 31 19 0 0 0 0 0 131 NNW 13 27 24 41 32 37 32 0 0 0 0 0 206 TOTAL 144 228 283 394 396 487 218 10 0 0 0 0 2160 NUMBER OF CALMS: 24 NUMBER OF INVALID HOURS: 24 NUMBER OF VALID HOURS: 2184 TOTAL HOURS FOR THE PERIOD: 2208

River Bend Station 2009 Regulatory Guide 1.21 Page 41 of 54 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 10/01/09 0:00 TO 12/31/09 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 1 1 6 9 61 100 22 1 0 0 0 201 NNE 0 2 2 11 12 69 97 4 0. 0 0 0 197 NE 1 1 4 5 7 40 103 13 4 0 0 0 178 ENE 1 1 0 5 5 41 61 44 2 0 0 0 160 E 0 3 3 7 12 65 48 18 2 0 0 0 158 ESE 1 1 3 8 15 54 123 69 8 0 0 0 282 SE 0 1 1 4 13 25 66 1.5 8 0 0 0 133 SSE 0 0 1 7 9 30 43 21 2 0 0 0 113 S 1 0 2 3 9 31 48 7 3 0 0 0 104 SSW 1 1 1 10 6 22. 9 7 3 0 0 0 60 SW 1 1 0 10 12 18 15 6 2 0 0 0 65 WSW 2 0 4 13 13 20 .5 8 1 0 0 0 66 W 0 0 6 5 7 23 19 8 3 0 0 0 71 WNW 1 0 3 6 13 32 48 10 0 0 0 0 113 NW 1 0 3 3 13 36 44 10 3 0 0 0 113 NNW 0 0 4 4 12 39 87 19 0 0 0 0 165 TOTAL 10 12' 38 107 167 606 916 281 42 0 0 0 2179.

NUMBER OF CALMS: 5 NUMBER OF INVALID HOURS: 24 NUMBER OF VALID HOURS: 2184 TOTAL HOURS FOR THE PERIOD: 2208

River Bend Station 2009 Regulatory Guide 1.21 Page 42 of 54 Table 7 Effluent and Waste Disposal Annual Report 2009 Year ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DOSE CALCULATIONS Analysis Location Ground Level Mixed Mode (meters) Releases Releases Gamma air dose (3) and 994 m WNW (Containment) CHI/Q - 421.0 CHI/Q - 33.1 Beta Air Dose Maximum Receptor (4) 994 m WNW CHI/Q - 421.0 CHI/Q - 33.1 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 Receptors 115 m ENE CHI/Q - -5977.0 CHI/Q - 407.5 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:

7 (1) All CHI/Q = 10 9 sec/m 3 2

(2) All D/Q = 10- m-(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.

River Bend Station 2009 Regulatory Guide 1.21 Page 43 of 54 Table 8 GROUND MONITORING WELL SAMPLES (H-3) - RBS LLD (pCi/I) 3000 LAB ID LOCATION -DATE TRITIUM 20090204 EB-1 -3/11/2009 < 567 20090205 MW-20 3/11/2009 < 564 20090206 EB-02 3/11/2009 < 565 20090207 MW-19 3/11/2009 < 565 20090208 EB-3 3/11/2009 < 565 20090209 MW-16 3/11/2009 < 566 20090210 EB-4 3/11/2009 < 568 20090211 MW-17 3/11/2009 < 568 20090212 EB-5 3/11/2009 < 566 20090225 MW-11 3/11/2009

  • 567 20090226 EB-6 3/11/2009
  • 569 20090227 MW-03 3/11/2009 < 569 20090228 EB-7 3/11/2009 < 571 20090229 MW-18 3/12/2009 < 577 20090230 EB-8 3/12/2009 < 569

River Bend Station 2009 Regulatory Guide 1.21 Page 44 of 54 LLD (pCi/l) 3000 LAB ID LOCATION DATE TRITIUM 20090231 MW-15 3/12/2009 < 573 20090232 EB-9 3/12/2009 < 557 20090233 MW-08 3/12/2009 < 544 20090234 EB 3/12/2009 < 545 20090235 MW-05 3/12/2009 < 550*

20090236 EB-1i 3/12/2009 < 541 20090237 MW-02 3/12/2009 < 540 20090238 MW-02D 3/12/2009 < 539 20090239 EB-12 3/12/2009 < 549 20090240 MW-10 3/12/2009 < 546 20090241 MW-10D 3/12/2009 < 554 20090242 EB-13 3/12/2009 < 551 20090243 MW-09 3/12/2009 < 554 20090244 EB-14 3/12/2009 < 543 20090245 MW-07 3/12/2009 < 550 20090246 EB-15 3/12/2009 < 551

River Bend Station 2009 Regulatory Guide 1.21 Page 45 of 54 LLD (pCi/i) 3000 LAB ID LOCATION DATE TRITIUM 20090608 EB-1 6/17/2009 < 550 20090609 MW-20 6/17/2009 < 558 20090610 EB-2 6/17/2009 < 547 20090611 MW-19 6/17/2009 < 545 20090612 EB-3 6/17/2009 < 552 20090613 MW-17 6/17/2009 < 545 20090614 EB-4 6/17/2009 < 574 20090615 MW-11 6/17/2009 < 549 20090616 .EB-5 6/17/2009 < 546 20090617 MW-18 6/17/2009 < 544 20090618 EB-6 6/17/2009 < 552 20090619 MW-08 6/17/2009 < 551 20090620 EB-7 6/17/2009 < 546 20090621 MW-05 6/18/2009 < 544 20090622 EB-8 6/18/2009 < 545 20090623 MW-02 6/18/2009 < 544

River Bend Station 2009 Regulatory Guide 1.21 Page 46 of 54 LLD (pCi/I) 3000 LAB ID LOCATION DATE TRITIUM 20090624 MW-02D 6/18/2009 < 549 20090625 EB-9 6/18/2009 < 550 20090626 MW-10 6/18/2009 < 544 20090627 EB-10 6/18/2009

  • 549 20090628 MW-09 6/18/2009 < 582 20090629 EB-11 6/18/2009 < 549 20090630 MW-07 6/18/2009 < 549 20090631 MW-07D 6/18/2009 < 549 20090632 EB-12 6/18/2009 < 546 20090771 EB-1 7/22/2009 < 548 20090772 MW-20 7/22/2009 < 547 20090773 EB-2 7/22/2009 < 549 20090774 MW-19 7/22/2009 < 548 20090775 EB-3 7/22/2009 < 551 20090776 MW-17 7/22/2009 < 549 20090777 EB-4 7/22/2009 < 579 20090778 MW-11 7/22/2009 < 549

River Bend Station 2009 Regulatory Guide 1.21 Page 47 of 54 LLD.(pCi/I) 3000 LAB ID LOCATION DATE TRITIUM

.20090779 EB-5 .7/22/2009 < 548 20090780 MW-18 7/22/2009 < 549

.20090781 EB-6 7/22/2009 *< 552 20090788 MW-05 7/23/2009 < 552 20090789 EB-8 7/23/2009 < 585 20090790 MW-05D 7/23/2009 < 553 20090791 MW-8 7/22/2009 < 550 20090792 EB-7 7/22/2009 < 547 20090793 MW-02 7/23/2009 < 553 20090794 MW-02D- 7/23/2009 < 554 20090795 EB-9 7/23/2009 < 551.

20090796 MW-10 7/23/2009 < 549 20090797 EB-10 7/23/2009 < 550 20090798 MW-09 7/23/2009 < 548 20090799 EB-11 7/23/2009 < 547 20090800 MW-07 7/23/2009 < 553 20090801 EB-12 7/23/2009 < 549

River Bend Station 2009 Regulatory Guide 1.21 Page 48 of 54 LLD (pCi/i) 3000 LAB ID LOCATION DATE TRITIUM 20091073 EB-01 10/13/2009 < 532 20091074 MW-20 10/13/2009 < 548 20091075 MW-20D 10/13/2009 < 547 20091076 EB-02 10/13/2009 < 526 20091077 MW-19 10/13/2009 < 533, 20091078 EB-03 10/13/2009 < 536 20091079 MW-18 10/13/2009 < 534 20091080 EB-04 10/13/2009 < 529 20091081 MW-08 10/13/2009 < 527 20091082 EB-05 10/13/2009 < 533 20091083 MW-02 10/13/2009 < 541 20091084 EB-06 10/13/2009 < 524 20091085 MW-10 10/13/2009 < 532 20091086 EB-07 10/13/2009 < 533 EB - Equipment Blank D - Duplicate (ex: MW-20D)

MW - Monitoring Well

River Bend Station 2009 Regulatory Guide 1.21 Page 49 of 54 GROUND MONTORING WELL SAMPLES (GAMMA) - RBS LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 i5 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 20090204 EB-1 3/11/2009 .< 6.22 < 6.11 < 14.53 < 5.02. < 10.15 < 6.50 < 10.58 < 11.87 < 7.13 < 4.58 < 30.85 < 14.65 20090205 MW-20 3/11/2009 < 8.74 < 8.01 < 17.33 < 5.70 <,12.68 < 6.80 < 13.64 < 13.41 < 8.97 < 9.94 < 33.58 < 14.91 20090206 EB-02 3/11/2009 < 7.08 < 6.43 < 10.94 < 7.98 < 14.64 < 7.06 < 11.44 < 14.85 < 8.90 < 7.17 < 33.19 < 10.37 20090207 MW-19 3/11/2-009 < 7.74 < 7.97 < 18.45 < 8.86 < 16.85 < 8.76 < 13.03 < 14.17 < 8.80 < 8.87 < 40.25 < 9.49 20090208 EB-3 3/11/2009 < 8.31 < 6.66 < 13.70 < 6.35 < 19.04 < 7.15 < 13.71 < 13.39 < 7.98 < 8.01 < 26.12 < 12.97 20090209 MW-16 3/11/2009 < 4.95 < 5.44 < 14.64 < 5.14 < 16.04 < 7.98 < 7.54 < 13.96 < 6.53 < 6.08 < 35.95 < 9.65 20090210 EB-4 3/11/2009 < 5.41 < 4.91 < 12.40 < 4.13 <.12.48 < 6.98 < 11.07 < 14.91 < 6.52 < 5.98 < 40.23 < 13.94 20090211 MW-17 3/11/2009 < 5.00 < 5.85 < 8.84 < 5.86 < 11.68 < 6.76 < 10.36 < 14.90 < 6.54 < 5.23 < 37.12 < 14.04 20090212 EB-5 3/11/2009 < 5.83 < 4.73 < 11.52 < 5.75 < 11.05 < 6.41 < 8.79 < 14.53 < 5.31 < 5.62 < 35.04 < 10.84 20090225 MW-I1 3/11/2009 < 4.08 < 5.41 < 12.63 < 5.02 < 8.65 < 7.08 < 11.50 < 14.86 < 5.47 < 5.43 < 34.98 < 12.31 20090226 EB-6 3/11/2009 < 5.29 < 4.76 < 10.54 < 5.56 < 9.83 < 6.31 < 9.02 < 14.85 < 5.38 < 4.73 < 32.33 < 10.48 20090227 MW-03 3/11/2009 < 6.83 < 5.34 < 12.83 < 5.13 < 14.53 < 7.05 < 9.96 < 15.00 < 7.68 < 4.94 < 32.70 < 13.71 20090228 EB-7 3/11/2009 < 4.97 < 4.79 < 12.22 < 6.04 < 9.05 < 5.77 < 9.39 < 14.92 < 6.20 < 5.28 < 35.12 < 12;09 20090229 MW-18 3/12/2009 < 6.03 < 5.20 < 12.86 < 4.79 < 12.35 < 7.01 < 10.45 < 14.31 < 5.49 < 5.57 < 27.96 < 11.80 20090230 EB-8 3/12/2009 < 5.69 < 5.36 < 12.74 < 4.83 < 13.30 < 7.38 < 10.65 < 14.73 < 6.55 < 5.90 < 33.87 < 12.74 20090231 MW-15 3/12/2009 < 5:77 < 4.92 < 10.34 <. 4.64 < 10.27 < 6.36 < 9.24 < 14.96 < 6.31 < 5.11 < 33.58 < 13.19 20090232 EB-9 3/12/2009 < 4.72 < 5.14 < 8.30 < 4.79 < 9.29 < 6.32 < 9.27 < 14.94 < 4.86 < 5.26- < 28.33 < 11.87

River Bend Station 2009 Regulatory Guide 1.21 Page 50 of 54 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 20090233 MW-08 3/12/2009 <,4.96 < 5.56 < 12.64 < 4.42 < 9.38

  • 6.89 < 11.63 < 14.39 < 6.02 < 4.65
  • 35.29 < 11.35 20090234 EB-10 3/12/2009 < 5.06 < 5.48 < 10.36 < 4.61 < 8.69 < 7.06 < 8.68 < 14.74 < 5.75 < 5.08 < 31.90 < 11.89 20090235 MW-05 3/12/2009 < 4.45 < 4.33 < 8.53 < 3.67 < 7.50 < 5.71 < 8.76 < 14.97
  • 5.71 < 3.67 < 34.08 < 10.10 20090236 EB-II 3/12/2009 < 4.03 < 4.88 <c 10.01 < 4.34
  • 9.16 < 5.31 < 8.80 < 14.95 < 5.32 < 4.03 < 29.96 < 9.02 20090237 MW-02 3/12/2009 < 5.49 < 4.64 < 12.01 < 5.54 < 9.49 < 6.30 < 10.35 < 14.78 < 5.41
  • 5.61 < 35.05 < 11.11 20090238 MW-02D 3/12/2009 < 5.04 < 5.52 < 9.97 < 4.48 < 10.67 < 6.60
  • 9.47 < 14.97 < 6.28
  • 4.76
  • 34.01 < 12.08 20090239 EB-12 3/12/2009 < 3.23 < 3.34 < 7.40
  • 2.58 < 6.48
  • 4.05 < 6.27 < 14.90
  • 3.54 < 3.10 < 26.45 < 7.81 20090240 MW-10 3/12/2009 < 3.22 < 3.01 < 7.09 < 2.74 < 6.43 < 3.85 < 5.66 < 14.97
  • 3.33 < 2.97 < 26.76 < 9.92 20090241 MW-10 D 3/12/2009 < 3.39 < 3.58 < 7.23 < 3.34 < 6.65 < 4.89 < 6.36 < 15.00 < 3.73 < 3.43 < 32.20 < 9.98 20090242 EB-13 3/12/2009 < 2.80 < 3.20 < 6.22 < 2.60 < 6.10 < 3.94 < 5.82 < 14.52
  • 3.18 < 2.75 < 26.20 < 9.07 20090243 MW-09 3/12/2009 < 3.54 < 3.50 < 6.35
  • 3.07 < 8.10
  • 4.56 < 7.06 < 14.98 < 4.07 < 3.46 < 29.27 < 9.58 20090244 EB-14 3/12/2009 < 3.20 < 3.21 < 6.87
  • 2.98 < 5.81 < 4.65
  • 5.49 < 14.97 < 3.40
  • 2.85 < 28.60 < 10.64 20090245 MW-07 3/12/2009 < 2.55 < 3.16 < 6.43 < 2.50 < 5.56 < 3.58 < 5.36 < 15.00 < 2.82 < 2.60 < 25.82 < 7.72 20090246 EB-15 3/12/2009 < 2.63 < 2.73 < 5.49 < 2.59
  • 5.32 < 3.70 < 5.12 < 14.14 < 2.92 < 2.52 < 25.99
  • 9.26 20090608 EB-1 6/17/2009 < 8.28 < 7.48 < 15.31 < 6.38 < 19.69 '< 9.93 < 12.81
  • 14.49 < 9.32 < 8.10 < 42.98 < 8.17 20090609 MW-20 6/17/2009 < 7.65 < 7.09 < 12.41 < 7.46 < 15.96 < 7.27 < 11.10
  • 14.45 < 8.72 < 7.55 < 38.31
  • 11.15 20090610 EB-2 6/17/2009 < 2.43 < 2.65 < 5.96 < 2.36 < 4.66 < 3.30 < 4.98 < 14.89 < 2.56 < 2.41 < 25.30 < 8.35 20090611 MW-19 6/17/2009 < 5.04 < 4.84 < 10.77 < 4.83 < 9.06- < 5.70 < 8.28 < 14.92 < 5.58 < 4.85 < 33.98 < 11.19 20090612 EB-3 6/17/2009 < 9.53 < 10.81 < 17.98 < 10.43 < 22.94 < 4.66 < 15.66 < 14.69 < 9.58 < 10.16 < 50.80 < 9.2-)8

River Bend Station 2009 Regulatory Guide 1.21 Page 51 of 54 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 20090613 MW-17 6/17/2009 < 5.81 < 5.88 < 12.61 < 4.38 < 10.95 < 5.81 < 10.95 < 14.96 < 5.87 < 5.29 < 38.23 < 12.52 20090614 EB-4 6/17/2009 < 2.72 < 2.93 < 5.73 < 2.51 < 6.08 < 3.54 < 4.80 < 15.00 < 3.06 < 2.65 < 25.76 < 8.31 20090615 MW-11 6/17/2009 < 4.31 < 5.21 < 11.34 < 5.46 < 9.95 < 6.28 < 9.21 < 14.10 < 5.59 < 5.02 < 30.70 < 12.70 20090616 EB-5 6)17/2009 < 2.81 < 2.98 < 6.45 < 2.60 < 5.94 < 4.03 < 5.95 < 14.89 < 3.05 < 2.51 < 28.25 < 10.42 20090617 MW-18 6/17/2009 < 5.30 < 4.70 < 10.13 < 4.59 < 11.46 < 6.28 < 7.79 < 14.99 < 5.29 < 5.11 < 34.11 < 10.43 20090618 EB-6 6/17/2009 < 3.23 < 3.91 < 8.43 < 3.83 < 7.77 < 4.52 < 6.20 < 14.99 < 3.85 < 3.33 < 28.35 < 10.15 20090619 MW-08 6/17/2009 < 5.15 < 4.97 < 9.65 < 5.24 < 10.49 < 5.81 < 10.14 < 14.64 < 5.76 < 5.47 < 34.51 < 9.03 20090620 EB-7 6/17/2009 < 2.83 < 3.16 < 6.82 .< 2.93 < 5.91 < 3.76 < 5.52 < 15.00 < 3.13 < 2.90 < 25.86 < 9.00 20090621 MW-05 6/18/2009 < 6.13 < 5.09 < 12.13 < 5.31 < 10.65 .< 7.46 < 9.32 < 13.94 < 6.60 < 5.93 < 33.79 < 10.05 20090622 EB-8 6/18/2009 < 2.81 < 2.90 < 6.58 < 2.74 < 5.02 <. 3.75 < 5.14 < 14.90 < 3.10 < 2.65 < 26.64 < 9.47 20090623 MW-02 6/18/2009 < 5.71 < 5.08 < 11.25 < 5.28 < 10.10 < 6.35 < 9.91 < 15.00 < 5.83 < 4.22 < 30.58 < 9.98 20090624 MW-02D 6/18/2009 < 2.76 < 3.12 < 6.55 < 2.68 < 5.42 < 3.93 < 5.73 < 14.93 < 3.09 < 2.73 < 25.58 < 9.26 20090625 EB-9 6/18/2009 < 4.07 < 4.49 < 8.80 < 3.87 < 3.87 < 7.63 < 4.76

  • 13.56 < 4.73 < 4.62 < 27.70 < 9.21 20090626 MW-10 6/18/2009 < 2.99 < 3.08 < 6.59 < 2.86 < 5.36 < 4.07 < 5.57 < 14.90 < 2.94 < 2.86 < 26.70 < 9.22 20090627 EB-10 6/18/2009 < 2.78 < 3.11 < 6.23 < 2.59 < 6.39 < 4.09 < 5.60 < 15.00 < 3.00 .< 2.73 **26.55
  • 10.45 20090628 MW-09 6/18/2009 < 8.86 < 5.51 < 17.08 < 9.46 < 17.02 < 8.79 < 13.58 < 12.85 < 8.74 < 7.10 < 36.35 < 12.38 20090629 EB-1 I 6/18/2009 < 3.32 < 3.88 < 8.45 < 3.27 < 6.94 < 4.82 < 6.97 < 14.79 < 3.19 < 3.60 < 31.73 < 11.32 20090630 MW-07 6/18/2009 < 4.85 < 4.65 < 9.93 <4 4.19 < 9.24 .< 5.43 < 7.71 < 14.14 < 5.40 < 4.82 < 33.06 < 10.52 20.090631 MW-07D. 6/18/2009 < 6.14 < 6.26 < 13.21 < 5.93 < 12.07 < 8.28 < 10.64 < 14.19 < 6.11 < 5.56 < 35.05 < 12.69

River Bend Station 2009 Regulatory Guide 1.21 Page 52 of 54 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 20090632 EB-12 6/18/2009 < 5.01 < 5.85 < 9.89 < 4.65

  • 11.44 < 5.89 < 9.85
  • 13.97 < 5.81 < 5.48 < 27.37 < 11.54 20090771 EB-I 7/22/2009 < 10.07 < 831 < 13.02 < 11.14 < 28.42 < 12.31 < 19.22 < 11.36
  • 9.75 < 9.26 < 35.90 < 9.49 20090772 MW-20 7/22/2009 < 9.48 < 7.35 < 10.82 < 14.23 - 26.21 < 13.64 < 17.91 < 9.25 < 11.90 < 7.06
  • 29.74 < 11.45 20090773 EB-2 7/22/2009 < 8.14 < 8.00 < 13.13
  • 6.08 < 16.15 < 9.99 < 10.66 < 7.52
  • 11.49 < 10.36 < 35.71 < 49.99 20090774 MW-19 7/22/2009 < 9.14 < 10.13 < 15.34 < 10.29 < 21.09 < 6.99 < 10.70 < 9.99
  • 9.29 < 7.96
  • 28.33 < 9.32 20090775 EB-3 7/22/2009 < 11.94 < 12.42 < 16.86 < 5.56 < 25.05 < 10.69
  • 15.44
  • 11.33
  • 9.49 < 11.94 <_37.52 < 11.81 20090776 MW-17 7/22/2009 < 8.16 < 10.53 < 21.62 < 10.18 < 21.05 < 11.80 < 13.93 < 9.57 < 10.42 < 9.28 < 29.77 < 8.74 20090777 EB-4 7/-2/2009 < 14.72 < 9.43 < 25.12 < 7.40 < 21.06 < 10.09 < 14.62 < 11.69 < 9.99 < 10.17 < 39.26 < 11.43 20090778 MW-Il 7/22/2009 < 10.25 < 6.69 < 21.21 < 11.65 < 19.24 < 12.26 < 18.32 < 11.41 < 10.89 < 10.40 < 37.85
  • 7.53 20090779 EB-5 7/22/2009 < 7.90 < 8.89 < 13.23 < 9.19 < 20.59 < 10.50 < 11.69 < 9.67 < 8.41 < 10.81
  • 21.71 < 12.00 20090780 MW-18 7/22/2009 < 8.80 < 7.46 < 19.66 < 7.86 < 19.61 < 7.15 < 19.81 < 11.57 < 13.56 < 11.11
  • 22.07 < 12.13 20090781 EB-6 7/22/2009 < 7.11 < 9.38 < 19.34 < 7.87 < 19.91 < 8.97 < 8.71 < 6.35 < 9.93 < 9.54 < 25.07 < 10.27 20090788 MW-05 7/23/2009 < 12.62 < 10.39 < 17.53 < 11.09 < 28.35 < 11.14 < 19.66 < 10.18
  • 10.71
  • 9.40 < 32.36 < 14.03 20090789 EB-8 7/23/2009 < 9.18 < 7.07 < 18.61 < 7.84 < 25.93 < 8.50 < 19.03 < 9.83 < 11.59
  • 12.37 < 37.53
  • 10.63 20090790 MW-05D 7/23/2009 < 8.88 < 10.04" < 13.28 < 8.78 < 21.10 < 13.15 < 9.61 < 9.25
  • 8.08
  • 8.49
  • 31.66 < 12.48 20090791 MW-8 7/22/2009 < 11.47. < 8.81 < 15.66 < 10.76 < 11.76 < 11.22 < 16.92 < 8.45 < 9.87 < 7.03 < 27.06 < 8.76 20090792 EB-7 7/22/2009 < 8.00 < 10.66 < 16.25 < 9.64 < 15.47
  • 8.96 < 18.01 < 8.85 < 8.95
  • 10.92 < 25.36 < 14.78 20090793 MW-02 7/23/2009 < 11.07 < 10.91 < 17.11 < 7.52 < 22.97 < 12.20 < 16.85 < 9.92 < 12.98 < 10.33
  • 33.94 < 6.19 20090794 MW-02D 7/23/2009 < 13.14 < 12.06 < 14.78 < 7.17 < 18.52 < 9.09 < 20.90 < 11.00 < 9.68 < 13.56 < 30.88 < 13.59

River Bend Station 2009 Regulatory Guide 1.21 Page 53 of 54 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 20090795 EB-9 7/23/2009

  • 8,33 < 7.76 < 13.01 < 8.21 < 18.85 < 12.02 < 19.59 < 12.36 < 10.94 < 9.98 < 30.43 < 13.39 20090796 MW-10 7/23/2009 < 8.50 < 9.37 < 18.69 < 6.32 < 15.43 < 9.21 < 11.75 .< 14.18 < 8.13 < 8.25 < 37.57 < 12.28 20090797 EB-10 7/23/2009 < 9.58 < 5.81 < 16.49 < 8.75 < 17.19 < 9.54 < 17.08 < 10.45 < 12.41 < 13.23 <39.05 < 6.19 20090798 MW-09 7/23/2009 < 9.26 < 11.43 <- 16.20 < 6.45 < 15.57 < 13.36 < 17.09 < 13.42 < 13.66. < 11.11 < 38.78 < 13.13 20090799 EB-I 1 7/23/2009 < 6.09 < 7.97 < 11.07 < 7.46
  • 9.78 < 8.13 < 11.39 < 7.57 < 9.33 < 7.38 < 30.25 < 13.80 20090800 MW-07 7/23/2009 < 5.53 < 5.93 <8.18 < 6.56 < 11.84 ,< 6.95 < 11.01 < 8.30 < 6.98 < 6.14 <. 23.20 < 12.34 20090801 EB-12 7/23/2009 < 9.02 < 7.62 < 11.49 < 8.03 < 20.32 < 11.47 < 13.00 < 8.59 < 10.07 < 8.76 < 27.84 < 7.44 20091073 EB-01 10/13/2009 < 10.69 < 8.49 < 15.33 < 6.54 < 19.24 < 8.35 < 16.02 < 9.53 < 11.59 < 9.82 < 35.11 < 9.28 20091074 MW-20 10/13/2009 < 7.12 < 7.42 < 18.48 < 7.79 < 17.72 < 11.34 < 17.81 < 9.12 < 8.84 < 8.46 < 30.66 < 13.58 20091075 MW-20D 10/13/2009 < 11.86 < 9..16 < 17.50 < 7.78 < 8.23- < 11.64 < 14.27 < 9.91 < 10.35 < 9.26 <. 42.55 < 14.06 20091076 EB-02 10/13/2009 - < 9.41 < 10.53 < 11.33 < 6.94 < 24.30 < 10.02 < 16.30 < 8.54 < 9.79 < 8.56 < 28.60 < 11.56 20091077 ,MW-19 10/13/2009 < 9.65 < 9.16 < 20.77 < 5.11 < 28.97- < 11.78 < 12.94 < 11.88 < 11.38 < 10.87 < 34.16 < 13.05 20091078 EB-03 10/13/2009 < 8.85 < 9.59 < 12.97 < 10.68 < 16.83 < 8.39 < 14.33 < 8.19 < 8.85 < 9.03 < 27.61 < 6.35 20091079 MW-18 10/13/2009 < 10.78 < 8.46 < 15.57 < 6.47 < 15.00 < 9.59 < 17.78 < 9.29 < 9.99 < 7.29 < 32.66 < 4.54-20091080 EB-04 10/13/2009 < 7.55 < 11.07 < 9.97 < 8.08 < 16.68 < 8,29 < 16.33 < 9.39 < 10.80 < 10.37 < 35.78 < 13.84 20091081 MW-08 10/13/2009 < 11.81 < 8.46 < 17.20 < 9.40 < 22.98 < 9.60 < 10.98 < 8.42 < 8.98 < 8.32 < 37.54 < 7.50 20091082 EB-05 10/13/2009 < 10.20 < 8.63 < 21.11 < 10.52 < 12.91 < 7.09 < 13.10 < 10.80 < 7.99 < 8.78 < 38.48 < 14.51 20091083 MW-02 10/13/2009 < 7.39 < 9.69 < 19.38 < 11.19 < 25.73 < 7.90 < 16.72 < i0.98 < 9.11 < 11.12 < 27.48 < 7.49 20091084 EB-06 10/13/2009 < 9.93 < 10.95 < 5.61 < 12.45 < 24.67 < .9.92 < 9.86 < 12.55 < 10.88 < 11.40 < 41.04 < 14.50

River Bend Station 2009 Regulatory Guide 1.21 Page 54 of 54 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 20091085 MW-10 10/13/2009 < 9.86 < 10.66 < 18.02 < ,12.35 < 28.04 < 13.80 < 15.69 < 9.47 < 12.60 < 9.51 < 38.16 < 12.20 20091086 EB-07 <13.66 < 11.46 10/13/2009 < 8.28 < 6.01 < 18.05 < 8.60 < 12.02 < 10.31 < 10.88

  • 10.61
  • 28.74 < 13.82 EB - Equipment Blank.

D -' Duplicate (ex: MW-20D)

MW - Monitoring Well k_.

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