ML20062C125

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Attachment 3 - LACBWR Offsite Dose Calculation Manual, Revision 8
ML20062C125
Person / Time
Site: La Crosse  File:Dairyland Power Cooperative icon.png
Issue date: 03/23/2019
From: Alexander Adams
LaCrosseSolutions
To:
Office of Nuclear Material Safety and Safeguards
References
LC-2020-007 LC-RP-PG-005, Rev 8
Download: ML20062C125 (44)
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Text

LaCrosseSolutions LC-2020-007 Attachment 3 LACBWR Offsite Dose Calculation Manual Revision 8

LACBW R S:fite Resforattfon Project Work Contiroll .Proced ure Offsitte Dose Caikruihintion M.a.11u.nal Procieihme No. LC-RP-P G-05 Revision No. 8 Preparer: A.R.Adam s A.R Adat11s via e-mail Date:

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Secondary Revjewer Scott Zoller ~

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Date:

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Regulatory Affairs assigned program & regulatory r~ws (*new only*): Initials/Date N/A Regulator y Required Reviews (afulcl1 c-ompleted LC-RA-PR-001 and QTR forms, as applicable

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Part 50 License: 10 CFR 50.59 and 50.90 DYES (gj NO Fire Protection: 10 CFR 50.48(!) DYES [gj NO Conditions of License: PSP: IO CFR 50.54(p) DYES [gj NO Conditions of License: E-Plan: IO CFR 50.54(q) DYES (gjNO Tenninatio n of License: 10 CFR 50.82(a)(6) and 50.82(a)(7) DYES [gj NO Part 72 License: 10 CFR 72.48 DYES [gJ NO Program Required Review/

RP: [gJ YES D NO DATE: o0 kz_.,/~

QA: D YES [gJ NO DATE:-

QTR: [gj YES O NO SIGNA TUREJ ~ { ; ~ _ _ _ _ _DATE: 3-22-2019 Approval Section PROJECT MANAGE R: SIGNATURE!

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DATE:_3- 22-2019_ _ __

Effective Date: 3 / ~/) '1 (assigned by Documen t Control or Project Manager)

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 TABLE OF CONTENTS

1. PURPOSE AND SCOPE .......................................................................................................5 1.1. Purpose ........................................................................................................................ 5 1.2. Scope ........................................................................................................................... 5
2. REFERENCES ....................................................................................................................... 5 2.1. Nuclear Regulatory Commission (NRC), Title 10, Part 100, Reactor Site Criteria ... 5 2.2. NRC, Title 10, Part 20, Standards for Protection Against Radiation, Appendix B, Table 2, Columns 1 and 2 ........................................................................................... 5 2.3. NRC, Regulatory Guide 1.109, Rev. 1, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CPR Part 50, Appendix I .............................................................................. .5 2.4. NRC, Title 10, Part 50.36a, Technical Specifications on Effluents from Nuclear Power Reactors ........................................................................................................... 5 2.5. NRC, Title 10, Part 50, Domestic Licensing of Production and Utilization Facilities, Appendix I .................................................................................................................. 5 2.6. Environmental Protection Agency (EPA), Title 40, Part 190, Environmental Radiation Protection Standards for Nuclear Power Operations .................................. 5 2.7. NRC, NUREG-0473, Rev. 2, Draft Radiological Effluent Technical Specifications 5 2.8. NRC, Regulatory Guide 1.21, Rev. 1, Measuring, Evaluating, and Reporting Radioactive Material in Liquid and Gaseous Effluents and Solid Waste ................... 5 2.9. NRC, NUREG 1302, Offsite Dose Calculation Manual Guidance: Radiological Effluent Controls for Boiling Water Reactors ............................................................ 6 2.10. LaCrosseSolutions Procedure LC-RP-PR-007, LACBWR Environmental Monitoring Program .................................................................................................... 6 2.11. LaCrosseSolutions Procedure LC-RP-TSD-002, Calculation of Liquid Effluent Maximum Permissible Concentration Values ............................................................ 6 2.12. LaCrosseSolutions procedure LC-OP-PR-001, LaCrosse Mobile LWP System Operating Procedure ................................................................................................... 6 Page 2 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 2.13. LaCrosseSolutions procedure LC-RP-TSD-001, Dose to members of the Public from Onsite Radiation Sources ................................................................................... 6 2.14. LaCrosseSolutions procedure LC-RP-PR-026, Radiological Air Sampling Process Job Specific General Air Monitoring .......................................................................... 6 2.15. Environmental Protection Agency (EPA), EPA-520/1-88-020, Federal Guidance Report l 1..................................................................................................................... 6 2.16. LC-RP-TSD-004, Revision 1, Lacrosse Airborne Release Bounding Assessment ... 6

3. GENERAL .............................................................................................................................. 6 3 .1. Definitions ................................................................................................................... 6 3.2. Responsibilities ........................................................................................................... 7 3.3. Precautions, Limitations and Prerequisites ................................................................. 9 3.4. Records ....................................................................................................................... 9
4. PROCEDURE ...................................................................................................................... 10 4.1. Offsite Dose Calculations ......................................................................................... 10 4.3. Radiological Environmental Monitoring Program ................................................... 28 4.4. Inter-laboratory Comparison Program ...................................................................... 30 4.5. Radiological Environmental Monitoring Report Requirements ............................... 31
5. ATTACHMENTS ................................................................................................................ 33 5.1. Figure 5.1, Site Map Including Effluent Release Boundary/Exclusion Area ........... 33 5.2. Table 5.1, Sample Liquid Release MPC Calculation Sheet.. .................................... 33 5.3. Table 5.2, Radioactive Liquid Waste Sampling and Analysis Requirements for Batch Releases to the Environment .......................................................................... 33 5.4. Table 5.3, Radiological Environmental Monitoring and Environmental Air Samples33 5.5. Table 5.4, Environmental Sample Analyses Typical Lower Limit of Detection (LLD) Values ............................................................................................................ 34 5.6. Table 5.5, Reporting Levels (RLs) for Radioactivity Concentrations in Environmental Samples ............................................................................................ 34 APPENDIX A ........................................................................................................................ 41 AIRBORNE EFFLUENT BOUNDING VALUES .............................................................. .41 Page 3 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Summary of Changes for Rev 8:

Added requirements for pumping out ground water and rainwater from flooded areas using a sump pump without dilution flow available.

Page4 of43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8

1. PURPOSE AND SCOPE 1.1. Purpose The Offsite Dose Calculation Manual (ODCM) contains the methodology, parameters and descriptions for the calculation of offsite doses resulting from direct exposures from radioactive liquid effluents and airborne effluents released during Lacrosse Boiling Water Reactor (LACBWR) Decommissioning activities.

Reporting requirements in the ODCM, the Radioactive Effluent Control Program, and the Radiological Environmental Monitoring Program are described. This procedure describes routine and special reports that must be submitted to the Nuclear. Regulatory Commission (NRC).

1.2. Scope This procedure applies to those personnel responsible for performing any of the actions related to the ODCM, including effluent control and radiological environmental monitoring and those personnel who prepare any reports in this procedure.

2. REFERENCES 2.1. Nuclear Regulatory Commission (NRC), Title 10, Part 100, Reactor Site Criteria 2.2. NRC, Title 10, Part 20, Standards for Pro_tection Against Radiation, Appendix B, Table 2, Columns 1 and 2
  • 2.3. NRC, Regulatory Guide 1.109, Rev. 1, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I 2.4. NRC, Title 10, Part 50.36a, Technical Specifications on Effluents from Nuclear Power Reactors 2.5. NRC, Title 10, Part 50, Domestic Licensing of Production and Utilization Facilities, Appendix I 2.6. Environmental Protection Agency (EPA), Title 40, Part 190, Environmental Radiation Protection Standards for Nuclear Power Operations 2.7. NRC, NUREG-0473, Rev. 2, Draft Radiological Effluent Technical Specifications 2.8. NRC, Regulatory Guide 1.21, Rev. 1, Measuring, Evaluating, and Reporting Radioactive Material in Liquid and Gaseous Effluents and Solid Waste Page 5 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 2.9. NRC, NUREG 1302, Offsite Dose Calculation Manual Guidance: Radiological Effluent Controls for Boiling Water Reactors 2.10. LaCrosseSolutions Procedure LC-RP-PR-007, LACBWR Environmental Monitoring Program 2.11. LaCrosseSolutions Procedure LC-RP-TSD-002, Calculation of Liquid Effluent Maximum Permissible Concentration Values 2.12. LaCrosseSolutions procedure LC-OP-PR-001, Lacrosse Mobile LWP System Operating Procedure 2.13. LaCrosseSolutions procedure LC-RP-TSD-001, Dose to members of the Public from Onsite Radiation Sources 2.14. LaCrosseSolutions procedure LC-RP-PR-026, Radiological Air Sampling Process Job Specific General Air Monitoring 2.15. Environmental Protection Agency (EPA), EP A-520/1-88-020, Federal Guidance Report 11 2.16. LC-RP-TSD-004, Revision 1, Lacrosse Airborne Release Bounding Assessment

3. GENERAL 3.1. Definitions 3 .1.1 Batch Release - A Batch Release is the discharge of liquid wastes of a discrete volume from the liquid waste system. Prior to sampling for analyses, each batch shall be isolated and then thoroughly mixed to assure representative sampling.

3 .1.2 Dewatering Operations - Dewatering is the discharge of an undefined volume of ground water from wells that will be released to the river.

Sampling for analysis is performed on a periodic basis during releases to ensure the limits of the ODCM are maintained.

3.1.3 Effluent Release Boundary- The Dairyland Power Cooperative (DPC) property line within the 1109-feet (338-meter) radius Exclusion Area is the Effluent Release Boundary (See Figure 5.1.)

3 .1.4 Exclusion Area - The Exclusion Area is defined as the area within an 1109-feet (338-meter) radius from the centerline of the Reactor Building.

This was the area established per 10 CFR 100 (Reference 2.1) as the Exclusion Area for plant siting and operation.

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LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 3 .1.5 Maximum Permissible Concentration (MPC) - The limiting liquid effluent concentration value in 10 CPR 20, Appendix B, Table 2, Column 2 (Reference 2.2).

3.1.6 Member of the Public - Any individual, except when he or she is receiving an occupational dose. The definition includes any individual who can receive a radiation dose in the general environment, independent of whether the individual may also be exposed to radiation in an occupation associated with the nuclear fuel cycle. This definition includes DPC employees working inside the Exclusion Area when they are not monitored for radiation exposure.

3 .1. 7 Operable/Operability - A system, subsystem, train, component or device is Operable or has Operability when it is capable of performing its specified function(s) and when all necessary attendant instrumentation, controls, a normal electrical power source, cooling or seal water, lubrication or other auxiliary equipment that are required for the system, subsystem, train, component or device to perform its function(s) are also capable of performing their related support function(s).

3.1.8 Pump-Down Operations -Pump-Do wn Operations is the discharge of an undefined volume of ground water and/or rain water from a flooded area using a sump pump, that will be released to the river. Sampling for analysis is performed prior to release to ensure the limits of the ODCM are maintained.

3.2. Responsibilities 3 .2.1 The Radiation Protection Manager (RPM) is responsible for:

1.) Ensuring the requirements in this document are implemented.

2.) Developing and approving the Annual Radioactive Effluent Release Report and the Radiological Environmental Monitoring Program Report.

3.) Calculating dose commitments from liquid effluents to the total body and to each organ of an individual, in each age specified group.

4.) Calculating dose commitments from airborne particulate effluents to the total body and to each organ of an individual.

5) Calculating dose commitments from direct radiation sources to the total body.

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LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8

6) Upon verification that any of the limits given in Sections 4.2.4, 4.2.5 or 4.2.6 have been exceeded or there has been a REMP Non-Conformance per Section 4.5.2, promptly reporting the results to Regulatory Affairs.

3.2.2 Regulatory Affairs is responsible for:

1.) Transmitting reports to the NRC if the total dose to a member of the public exceeds the limits provided in Section 4.2.4, 4.2.5 or Section 4.2.6 or if or there has been a REMP Non-Conformance per Section 4.5.2.

2.) Submitting the routine, special and non-conformance reports to the NRC as required in Sections 4.2.4, 4.2.6, 4.2.7 and 4.5.2.

'3.) Reporting any other circumstances that are required to be reported to the NRC per this ODCM.

3.2.3 The Radiation Protection Supervisor (RPS) is responsible for:

1.) Ensuring the requirements for monitoring, surveillance, sampling, analysis and calculations specified in this document are completed 2.) Upon verification that any of the limits given in Sections 4.2.4, 4.2.5 or 4.2.6 have been exceeded or there has been a REMP Non-Conformance per Section 4.5.2, promptly reporting the results to the RPM 3.) Assisting with preparation of the Radiological Environmental Monitoring Program Report as per RPM request.

4.) Assisting the RPM in performing calculations of radioactivity concentrations in effluents released to areas beyond the Effluent Release Boundary and performing independent reviews of all calculations performed by RPTs.

3.2.4 Radiation Protection Technicians (RPTs) are responsible for:

1.) Performing radioactive liquid waste sampling and analysis.

2.) Performing representative environmental type air sampling.

3.) Performing calculations of Lower Limits of Detection (LLD) for radioactivity analyses.

4.) Performing calculations of radioactivity concentrations in effluents released to areas beyond the Effluent Release Boundary.

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LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 5.) If any of the assumptions or average values cited in the ODCM change in a non-conservative manner (e.g., would result in higher doses to a member of the public), notifying the RPS promptly.

6.) Upon verification that any of the limits given in Sections 4.2.4, 4.2.5 or 4.2.6 have been exceeded or there has been a REMP Non-Conformance per Section 4.5.2, promptly reporting the results to the RPS.

3.3. Precautions, Limitations and Prerequisites 3 .3 .1 If any of the assumptions or average values cited in the ODCM change in a non-conservative manner (e.g., would result in higher doses to a member of the public), the RPS must be notified.

3.3.2 Ensure that upon verification that any of the limits given in Sections 4.2.4, 4.2.5 or 4.2.6 have been exceeded or there has been a REMP Non-Conformance per Section 4.5.2, the results are promptly reported to the appropriate individual or organization.

3.4. Records 3 .4.1 System and Device Operability Checks 3.4.2 Radioactive Liquid Waste Sampling and Analysis results 3.4.3 Calculations of Lower Limits of Detection for radioactivity analyses 3 .4.4 Calculations of allowable release rates for liquid effluents 3 .4.5 Calculations of Liquid Effluent Dose Contribution 3.4.6 Calculations of dose commitments from liquid effluents to the total body and to each organ of an individual, in each age specified group 3.4. 7 Calculations of dose commitments from airborne particulate effluents to the total body and to each organ of an individual 3.4.8 Calculations ofradioactivit y concentrations in effluents released to areas beyond the Effluent Release Boundary 3.4.9 All Corrective Actions and Radiological Effluent Control Program non-compliances 3 .4.10 Calculations of total dose to a member of the public, including dose from direct radiation, liquid effluents and airborne releases, to determine if the total dose limits in Section 4.2.6 have been exceeded Page 9 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 3.4.11 Results of the Inter-laboratory Comparison Program 3.4.12 Copies of all reports sent to the NRC, including the Radiological Environmental Monitoring Report and the Annual Radioactive Effluent Release Report

4. PROCEDURE 4.1. Offsite Dose Calculations 4.1.1 Calculation of Allowable Liquid Releases The LACBWR Decommissioning related water infiltration and D&D related water usage, is discharged to the Mississippi River using the liquid waste discharge system, from Pump-Down Operations or from dewatering operations. In order to verify liquid releases will meet the 0.5 MPC release limit, release concentrations are assessed by the lab analysis data using a step-by-step method. The sample form presented in Table 5.1 may be used as a worksheet for batch release and pump-down operation calculations.

4.1.2 Liquid Effluent Dose Contribution To demonstrate compliance with the dose limits in Section 4.2.4, dose contributions are calculated at a maximum interval of once every calendar quarter for all radionuclides identified in liquid effluents released to unrestricted areas, using the methodology presented in NRC Regulatory Guide 1.109 (Reference 2.3 ). This methodology takes the form of the following general equation:

Where:

Dar = the cumulative dose commitment to the total body or any organ 't",

of an individual in age group (a), from the liquid effluents released (m),

expressed in mrem.

C IJ.. = the total quantity of radionuclide (i) released G), in curies (Ci).

Aair = the site-related ingestion dose commitment factor to the total body or any organ ('t"), of an individual in age group (a), for each identified principal gamma and/or beta emitter, in mrem-gal-min- 1-Ct 1*

Fj = the average dilution water flow rate during release G), in gallons per minute.

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LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 The equation shown above requires the use of a dose factor (Aai-r) for each radionuclide (i), organ (i) and individual in age group (a), which includes the factors which determine the ultimate dose received, such as pathway transfer factors (e.g., bioaccumulation factors), pathway usage factors, ingestion dose factors and dilution factors. The following site-specific conditions determine the site-specific factors incorporated into the liquid effluent dose calculation model at LACBWR:

1.) Liquid Dose Pathways Due to the LACBWR status as a fresh water site, there is no invertebrate pathway. The drinking water pathway is not included, since the nearest community that obtains its drinking water supply from the Mississippi River is located at Davenport, Iowa, which is 195 miles downstream. The drinking water pathway represents <

0.01 % of the dose to any organ. The irrigated foods pathway is not included since the river water is not used for irrigation in this area and the shoreline deposits pathway is insignificant for the Mississippi River. The only possibly significant dose pathway is the dose commitment due to ingestion of fish from the Mississippi River.

2.) , Liquid Release Dilution The liquid effluent flow collected by the decommissioning work activities is typically diluted by Circulating Water from G-3. For offsite dose calculations, no dilution by the Mississippi River flow is considered. Also, discharges of influx river water normally take place on average during less than 75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br /> per month(<

approximately 10% of the time). Therefore, no fish in the river are continuously exposed to a radioactive environment produced by LACBWR liquid, as assumed in the calculation of published bioaccumulation factors for fish.

Based on the above site-specific criteria, the dose factor (Aai,) is defined as follows:

Where:

Ko= a units conversion constant, 5.03 E+5 =

(1 E+ 12 pCi/Ci x 0.2642 gal/ 1) / (8760 hrs/yr x 60 min/hr)

UFa = fish consumption usage factor for an individual in age group (a), in kg/yr.

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LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 BFj = the fish bioaccumulation factor for nuclide (i), in pCi/kg per pCi/ 1.

DFait =the ingestion dose factor for age group (a), for nuclide (i),

in organ ('r), in mrem/pCi.

4.1.3 Calculation of Dose Commitments from Liquid Effluents The equations for this calculation have been formatted on a computer-based spreadsheet. The values of (BFj), and (DF air), or equivalent terms specified in NRC Regulatory Guide 1.109, are determined based on site-specific factors, and those values plus the constant (Ko) have been entered on the spreadsheet.

Prior to each batch release and releases from Pump-Down operations, representative samples are obtained and analyzed.

During Dewatering Operations, samples are periodically obtained and analyzed.

The results of the analysis of the waste samples determine the sum total of the MPCs that are released as follows:

Total MPCs = L (C/Cimpc)(Fr!Fd)

Fr= Discharge Flow Rate [gpm]

Fd =Actual Dilution Flow Rate [gpm]

Cimpc = Maximum Permissible Concentration [µCi/mL] for isotope "i" Ci= Sample Radioactivity Concentration [µCi/mL] of isotope "i" NOTE:

Fd I Fr is defined as the Dilution Factor For releases without diiution flow available, a dilution factor of 1 shall be used.

To perform the calculation, enter the following information in the appropriate cells of the spreadsheet for each liquid effluent released during the period of interest:

1.) Date Page 12 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 2.) Release interval, hours (hrs) 3.) Waste volume, gallons (gal) 4.) Circulating Water flow rate, (Set at a value of 43,840 GPM) 5.) Activity concentration of each isotope (i) in waste, µCi/ml The spreadsheet program will calculate and display the total quarterly dose in mrem to the total body and each organ of an individual in each age group. The cumulative calendar year doses and the percentage of the dose

.limits set forth in Section 4.2.4 are also calculated. This spreadsheet may also be used to print the data tables for the liquid effluent section of the annual Radioactive Effluent Release Report.

4.1.4 Allowable Airborne Release Rates The LACBWR Decommissioning work may cause airborne radionuclides to be released and reach unrestricted areas. The stack is not being used in decommissioning, so any potential airborne releases will be treated as ground releases. The airborne concentrations will be maintained at levels that will prevent areas from becoming Airborne Radioactivity Areas as defined in 10 CFR 20. Where necessary, outside work may be tented and/or the air exhausted through HEP A filters to ensure that airborne concentrations remain as low as reasonable achievable.

4.1.5 Airborne Effluent Dose Contribution To demonstrate compliance with the dose limits in Sections 4.2.1, 4.2.5, and 4.2.6, dose contributions have been calculated using a bounding assessment as described in Regulatory Guide 1.21. The calculated values of the bounding assessment for dose to members of the public are provided in Appendix A.

4.1.6 Calculation of Dose Commitments from Airborne Effluents The calculation of dose to a member of the public from ground level airborne releases has been performed using the following methods and documented in Reference 2.16. The values of (BR), and (DCFi), or equivalent terms are published in regulatory guidance documents and industry accepted technical publications.

The general equation for calculating dose to a member of the public from ground level airborne releases is as follows:

Da.= Li (Ai DCFi BR) K (x/Q)g Page 13 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Where:

Dar = the cumulative annual dose commitment to the total body or any organ 1: during the time period of the release, of an individual "a", from airborne effluents released, expressed in mrem.

Ai = airborne concentration for radionuclide "i" at the release point, in

µCi/m 3 DCFi = inhalation dose conversion factor for each radionuclide "i", for effective dose or organ dose, in (mrem/yr)/(µCi/m 3)

BR= the breathing rate for the individual, in m 3/yr K = unit conversion factor (x/Q)g = Relative concentration factor at the location of interest for a ground level release (sec/m3)

Modifying the general equation to accommodate the site-specific monitoring program, the equation for calculating dose to a member of the public from ground level airborne releases is as follows:

Da,= Li (Ai DCFi BR)

Where:

Dar = the cumulative dose commitment to the total body or any organ 1:

during a week, of an individual "a", from airborne effluents released, expressed in mrem.

DCFi = inhalation dose conversion factor for each radionuclide "i", for effective dose or organ dose, in mrem/µCi BR = the breathing rate for the individual, in ml/week Ai= airborne concentration for radionuclide "i", in µCi/ml For the open-air samplers, Ai is the concentration Ci measured by the samplers in µCi/ml.

For releases from the temporary ventilation units:

Ci = HEP A exhaust concentration of radionuclide "i" in µCi/ml.

Page 14 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 F = Temporary ventilation fan volumetric flowrate, in m 3/sec (x/Q)g = Relative concentration factor at the location of interest for a ground level release (sec/m3)

Airborne effluent concentrations from air samplers shall be determined at least once per week as required in 4.2.5.B.2/3.

4.2 Radioactive Effluent Control Program 4.2.1 Program Requirements 1.) The Radioactive Effluent Control Program (RECP) conforms to the guidance of 10 CFR 50.36 (Reference 2.4) for the control of radioactive effluents and for maintaining the doses to members of the public from radioactive effluents as low as reasonably achievable. This program establishes the requirements for monitoring, sampling and analysis of radioactive liquid and airborne tritium and particulate effluents released from LACBWR to ensure the concentrations in effluents released to areas beyond the Effluent Release Boundary conform to 10 CFR Part 20, Appendix B, Table 2, Columns 1 and 2. The program provides limitations on the annual and quarterly dose commitment to a member of the public from radioactive effluents in conformance with Appendix I of 10 CFR Part 50 (Reference 2.5).

2.) In accordance with provisions of 40 CFR 190 (Reference 2.6), the restrictions and surveillance requirements for total dose to any member of the public from all LACBWR related sources and dose pathways (direct exposures, liquid effluents, and airborne tritium and particulate effluents) are evaluated on a quarterly and an annual basis.

4.2.2 Liquid Effluents Sampling and Analysis All liquid effluent releases at LACBWR will normally be released from the LACBWR temporary piping system to the DPC NPDES release point at the Mississippi River. Prior to the discharge of a batch release, two representative samples will be analyzed after the liquid has been processed, as needed, through an appropriate filtration and demineralizer system. The radioactive content of each discharge is determined in accordance with Table 5.1 or similar.

Prior to the discharge from Pump-Down Operations, and after a stoppage of a release for more than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, two representative samples, drawn from different locations of the volume of water contained in the flooded area, will be analyzed. The radioactive content of each discharge is determined in accordance with Table 5.1 or similar.

Page 15 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 A sample shall be drawn and analyzed daily for pump-down operations without dilution flow available, when the initial concentrations are greater than 10% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20. These samples shall be used to verify that the discharges are less than 50% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20.

The results of pre-release analyses are used in accordance with the Offsite Dose Calculations methodology to assure that the concentration at the point of release is maintained within the limits specified in this document.

During Dewatering Operations, sampling and analysis of the effluent will be performed periodically during the release.

4.2.3 Airborne Tritium and Particulate Sampling and Analysis

1) When facilities inside the radiologically controlled area (RCA) are demolished, low volume air samplers will be set up outside the RCA in representative areas where public receptors are present and in accordance with the wind direction. These samplers will be used for verification that local isotopic concentrations are maintained less than the limits of 10CFR20 Appendix B Table 2 Column 1.
2) When directing temporary HEP A ventilation equipment exhaust outside facilities, representative air monitoring will be positioned to evaluate for the possibility of a ground type release to the unrestricted area. The HEP A exhaust air sampling equipment will.

be operated during the course of the facility demolition work activity and samples will be analyzed and evaluated for verification of the dose commitments per Sections 4.1.5 and 4.1.6.

4.2.4 Liquid Effluent Release Limitation Operability Requirements 4.2.4.A.1 The concentration of radioactive material released from the site to Effluent Release Boundary (see Figure 5-1) shall be limited to 50% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20.

Page 16 of 43

~--~--- - -

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 4.2.4.A.2 During: (1) a batch release of radioactive liquid wastes from the liquid waste system, or (2) releases from Pump-Down Operations, the combination of dilution water flow and wastewater discharge flow shall be verified to ensure the discharge concentration limits of 4.2.4.A.1 are not exceeded:

Dilution Water Flow: 2'.'_ 43,840 gpm (1) Batch Release Discharge Flow: ::: 84 gpm (2) Pump-Down Release Discharge Flow

  • Using Tsurmuri Model LB-480 pump::: 84 gpm
  • Using PowerPrime Model DVlOOc::: 1600 gpm Applicability: At all times during the releases Action
1. With the dilution flowrate specified in 4.2.4.A.2 not met, releases may be initiated provided the undiluted (i.e., dilution factor of 1) discharge concentrations are less than 50% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20, otherwise immediately terminate the release.
2. With the discharge flowrate specified in 4.2.4.A.2 not met, decrease the discharge flowrate to within the above limit, OR terminate the release.

4.2.4.A.3 The undiluted radioactivity content of liquid waste from dewatering operations shall be determined to be less than 10% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20.

Applicability:

  • Within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of the start of dewatering operations*, and then subsequently every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8

  • Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the start of dewatering operations for Tritium analysis Action
1. With the radioactive content of liquid waste from dewatering operations specified in 4.2.4.A.3 not met, analyze the sample in accordance Surveillance 4.2.4.B.4. The results of these analyses shall be used with the calculation methods in the ODCM to assure that the concentration at the point of release is maintained within the limits of Section 4.2.4.A.1.
2. With the radioactive content ofliquid waste specified in 4.2.4.A.1 not met, dewatering operations may continue for up to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> provided that: the concentration of radioactive content released in liquid waste from the site is less than the concentration levels specified in 10 CFR Part 20, Appendix B, Table 2, Column 2, AND the estimated cumulative dose does not exceed the limits of 4.2.4.D.

Surveillance Requirements 4.2.4.B.1 Maximum discharge flow for each batch release shall be verified by identifying the discharge pump to be Tsurmuri Model LB-480, or other pump with an equivalent Head vs Flow characteristic.

Maximum discharge flow for Pump-Down Operations shall be verified by identifying the discharge pump to be PowerPrime Model DVI OOc, or other pump with an equivalent Head vs Flow characteristic.

4.2.4.B.2 Dilution flow is required for all discharges with undiluted concentrations greater than or equal to 50% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20. Dilution flow, when required, for each batch release of radioactive liquid or Pump-Down Operation release, shall be verified with the G3 Coal Plant to be 2: 43,840 gpm to assure that the concentration at the point of release is maintained within the limits of Section 4.2.4.A.1.

4.2.4.B.3 Page 18 of 43

LC-RP-PG-00 5 Offsite Dose Calculation Manual Revision 8 The radioactivity content of each batch release of radioactive liquid waste, or each release from Pump-Down operations, shall be determined prior to release by two independent samples that are analyzed in accordance with Table 5.1. The results of pre-release analyses shall be used with the calculation methods in the ODCM to assure that the concentration at the point ofrelease is maintained within the limits of Section 4.2.4.A. l.

The radioactive content ofreleases from Pump-Down operations with discharge concentration s greater than 10% the concentration s specified in Appendix B, Table 2, Column 2 of 10CFR20 shall be sampled and analyzed daily.

4.2.4.B.4 The radioactive isotopic content specified in Table 5.2 of liquid waste from dewatering operations shall be determined weekly. The results of these analyses shall be used with the calculation methods in the ODCM to assure that the concentration at the point of release is maintained within the limits of Section 4.2.4.A.1. Dilution of the dewatering discharge concentration s from Circulating Water flow of the G-3 Coal plant, may be applied for the analysis, provided the dewatering discharge flow can be determined; otherwise, a dilution factor of 1 shall be used.

Basis 4.2.4.C.1 This effluent release limit is provided to ensure that the concentration of radioactive materials released in liquid waste from the site will be less than the concentration levels specified in 10 CPR Part 20, Appendix B, Table 2, Column 2. This limitation provides additional assurance that the levels of radioactive materials in bodies of water outside the site will result in exposures within (1) the Section II.A design objectives of Appendix I, 10 CPR 50, to a member of the public, and (2) the limits of 10CFR20.1301.

4.2.4.C.2 For batch releases, or pump-down operations using the Tsurmuri Model LB-480 pump, a fixed dilution factor of 521.9 or less, is used when dilution flow is required for the release. This value is based on a dilution flow of 43,840 gpm, which is the minimum Circulating Water flow, and a maximum effluent, discharge pump flow of 84 gpm (43,840/84), and Page 19 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 provides a conservative dilution factor independent of actual flowrates.

Circulating water flow greater than 43,840 gpm, or discharge flow less than 84 gpm, results in a conservatively higher actual dilution factor.

For releases from Pump-Down Operations using the PowerPrime Model DVlOOc pump, a fixed dilution factor of27.4 or less, is used when dilution flow is required. This value is based on a dilution flow of 43,840 gpm, which is the minimum Circulating Water flow, and a maximum effluent discharge pump flow of 1600 gpm (43,840/1600), and provides a conservative dilution factor independent of actual flowrates. Circulating water flow greater than 43,840 gpm or discharge flow less than 1600 gpm, results in a conservatively higher actual dilution factor.

4.2.4.C.3 Analysis of two independent samples for batch releases minimizes the potential for incorrectly obtaining and/or measuring the release concentrations.

The requirement for daily sampling for Pump-Down operations, when the discharge concentrations are greater than 10% the concentrations specified in Appendix B, Table 2, Column 2 of 10CFR20, provides an additional level of assurance that the two localized samples from large volumes of water in flooded areas, are representative of the entire volume, and do not result in the effluent concentrations exceeding the limits of 4.2.4.A.1 during the release.

4.2.4.C.4 The undiluted effluent release limits of 4.2.4.A.3 during dewatering operations are provided at 1/10 of the MPCs stated in Table 5.1. Changes in radioactivity levels in groundwater occur at a relatively slow rate. This limitation provides a level of assurance that an unforeseen increase in radioactivity in the dewatering wells can be identified prior to effluent concentrations exceeding the limits 4.2.4.A.1.

Action #2 of 4.2.4.A.3 allows dewatering to continue for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> provided that the samples for radioactive content in liquid waste from the site is less than the concentration levels specified in 10 CFR Part 20, Appendix B, Table 2, Column 2, AND the estimated cumulative dose does not exceed the limits of 4.2.4.D. The concentration levels of 10 CFR Part 20, Appendix B, Table 2 are release concentrations that if "ingested continuously over the course of a year, would produce a total effective dose equivalent of 0.05 rem (50 millirem or 0.5 millisieverts)". The 48-hour period provides time to prepare the affected area for terminating dewatering operations and is a small :fraction of the time period used for Page 20 of 43

LC-RP-PG-00 5 Offsite Dose Calculation Manual Revision 8 continuous release limits of 10CFR20. Releases that exceed the limits of 10 CFR Part 20, Appendix B, Table 2 over the 48-hour period must still meet the cumulative dose limits.

4.2.4.D Dose Limits

1) The dose or dose commitment to a member of the public from radioactive materials in liquid effluents released to areas beyond the Effluent Release Boundary is limited to:

.Calendar Quarter Calendar Year **

< 1.5 mrem total body < 3 mrem total body

< 5 mrem to any organ < 10 mrem to any organ

2) The cumulative dose contribution from liquid effluents is determined at least once per calendar quarter, in accordance with Sections 4.1.2 and 4.1.3.
3) If this calculated dose exceeds the above limits, the RPM will prepare a Special Report, which identifies the cause(s) for exceeding the limit(s) and defines the corrective actions, which have been or will be taken to assure that subsequent releases are in compliance with the above limits.
4) The RPM will review and approve the report and submit the Special Report to Regulatory Affairs.
5) Regulatory Affairs will review, approve and submit the Special Report to the Director, Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555, within 30 days.

These dose limits are provided to implement the requirements of Sections II.A, III.A, IV.A of Appendix I, 10 CFR Part 50. The dose calculations implement the requirement in Section III.A of Appendix I. Conformance with the guides of Appendix I is shown by calculational procedures based on models and data, such that the actual exposure of an individual through appropriate pathways is unlikely to be substantially underestimate d.

Page 21 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 4.2.5 Airborne Effluent Release Limitations Operability Requirement 4.2.5.A.l The dose to a member of the public, in areas at or beyond the Site Boundary (see Figure 5-1), from tritium and all radionuclides in particulate form with half-lives greater than 8 days in gaseous effluents released from the site shall be limited to the following:

1. During any calendar quarter: Less than or equal to 7.5 mrem to any organ,and
2. During any calendar year: Less than or equal to 15 mrem to any organ.
3. During any calendar quarter: Less than or equal to 10 millirads for gaseous effluents of beta radiation in the form of tritium.
4. During any calendar year: Less than or equal to 20 millirads for gaseous effluents of beta radiation in the form of tritium.

Applicability: At all times.

Action With the calculated dose from the release of tritium and/or any radionuclides in particulate form with half-lives greater than 8 days in gaseous effluents exceeding twice the limits of Requirement 4.2.5.A.l:

1. Limit subsequent releases such that the dose or dose commitment to a member of the public from all uranium fuel cycle sources to less than or equal to 25 mrem to the total body or organ (except the thyroid which is limited to less than or equal to 75 mrem) over 12 consecutive months.
2. Prepare an analysis, which demonstrates that radiation exposures to all member of the public from all uranium fuel cycle sources (including all effluent pathways and direct radiation) are less than the 40CFR Part 190 Standard. The radiation exposure analysis shall use the methods prescribed in the ODCM.

Page 22 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Surveillance Requirement 4.2.5.B.1 Cumulative dose contribution for the current calendar quarter and current calendar year for tritium and all radionuclides in particulate form with half-lives greater than 8 days shall be verified by measuring concentrations as described in effluent monitoring Surveillance 4.2.5.B.2/3.

Bases This Section implements the requirements of Sections II.C, III.A and IV.A of Appendix I, 1OCPR Part 50. The Operability Requirements are the guides set forth in Section II.C of Appendix I. The ACTION statements provide the required operating flexibility and at the same time, implement the guides set forth in Section IV.A of Appendix I to assure that the releases of radioactive materials in gaseous effluents will be kept "as low as is reasonably achievable."

Particulate and tritium airborne effluents and resulting doses will be limited by the requirements of References 2.2, 2.5 and 2.6.

The annual dose limits contained in 40 CPR 190 (Reference 2.6), are 25 mrem to the whole body, 75 mrem to the thyroid and 25 mrem to any other organ from all sources of radiation and effluent pathways.

10 CPR 50, Appendix I (Reference 2.5), state that the annual total quantity of all radioactive material in particulate form released in effluents to the atmosphere will not result in an estimated annual dose or dose commitment to any individual in an unrestricted area in excess of 15 millirems to any organ. In addition, it states that if the quantity of radioactive material actually released in effluents to unrestricted areas during any calendar quarter is such that the resulting radiation exposure, would exceed one-half the annual exposure (i.e., 7.5 mrem organ dose),

the licensee will an investigate to identify the causes for such release, initiate correction actions and submit a report to the NRC (see Section 4.2.6).

Appendix B, Table 2 of 10 CPR 20 (Reference 2.2) contains the Maximum Permissible Concentration (MPC) values for radionuclides released in water and air that result in dose to the public. The effluent concentration values given in 10 CPR 20, Table 2 are concentrations, which, if inhaled or ingested continuously over the course of a year, would produce a total effective dose equivalent of 50 mrem. These effluent concentrations can be exceeded for a short period of time, but only if the quarterly and annual dose limits of 4.2.4.1 and 4.2.5.A.1 above are not exceeded.

Page 23 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Airborne Effluent Monitoring Operability Requirement 4.2.5.A.2 The RX Building temporary ventilation exhaust fan air sampler shall be operable during active decommissioning:

Applicability:

When exhaust fan is running.

Action:

With the temporary ventilation air sampler inoperable, cease operation of the ventilation exhaust fan until the air sampler is restored to operable status.

Operability Requirement 4.2.5.A.3 Low volume local air samplers (minimum of 4) shall be operable and set in appropriate locations for predominant wind direction patterns.

Applicability:

At all times during active decommissioning within the RCA.

Action:

With less than four local air samplers in operation, decommissioning activities may proceed provided at least 2 local air samplers are in operation and 4 local air samplers are returned to operable status within the next 7 days.

Surveillance Requirement 4.2.5.B.2/3 The effluent concentrations from each air sampler shall be determined at least once per week. Measured weekly concentrations greater than 10 times the concentrations of Appendix A shall be reported to the RPM and those concentrations compared to the limits of 4.2.5.A.l for compliance.

Page 24 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Each radioactive plant monitoring instrumentation and air sampling equipment shall be calibrated as per the applicable plant Radiation Protection Instrument Calibration Procedures. The frequencies at which these calibrations are done will be as described in the applicable plant Radiation Protection Instrument Calibration Procedures.

Bases The radioactive air samplers will provide means of monitoring effluent releases and provide assurance the releases are being maintained less than those calculated in the bounding assessment of Reference 2.16. Weekly concentrations greater than 10 times bounding concentrations presented in Appendix A indicate the potential for exceeding the limits of 4.2.5.A.1.

4.2.6 Total Dose to a Member of the Public Limits and Reporting Requirements 1.) The total dose equivalent to any member of the public due to release of radioactivity from all LACBWR effluent sources (liquid and airborne) and direct radiation from LACBWR, shall be limited to < 25 mrem to the total body or any organ (except the thyroid, which is limited to < 75 mrem) over a period of one calendar year.

2.) When calculated doses from the release of radioactive materials in liquid effluents exceed twice the calendar year dose limits specified in Section 4.2.4, a determination must be made if the dose limits from all LACBWR liquid and airborne effluent releases and direct radiation in Step 1 above have been exceeded. The total dose equivalent must include all radioactivity in liquid and airborne effluents and direct radiation from all potential sources (including the ISFSI).

3.) If the annual dose limits to a member of the public from all pathways/sources have been exceeded, notify the RPM.

4.) The RPS or RPM will prepare a Special Report (including the analysis, which estimates the radiation dose to a member of the public for the calendar year) and submit it to Regulatory Affairs.

For conservatism in compliance with the limit on the dose equivalent due to release of radioactivity and radiation, the maximum total dose to any member of the public will be assumed to be the sum of the maximum doses from each dose pathway/source, even though the actual maximally exposed individual for each of the pathways may not be the same person.

Page25 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 5.) Regulatory Affairs will review, approve and submit the Special Report to the Director, Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555, within 30 days, which includes the estimated total body and organ doses and defines the corrective actions to be taken to reduce subsequent releases to prevent recurrence of exceeding these limits. If the release condition resulting in the limits being exceeded has not already been corrected, the Special Report shall include a request for a variance in accordance with the provisions of 40 CFR 190.

Submittal of the Special Report is considered a timely request, and a variance is granted until staff action on the request is complete.

6.) Cumulative dose contributions from liquid effluents shall be determined quarterly and annually in accordance with Section 4.1.3. This requirement is provided to meet the dose limitations of 40 CFR 190.

7.) If calculated doses from plant radioactive effluents exceed the design objective doses of Appendix I, 10 CFR Part 50 notify the RPM.

8.) The RPS or the RPM will prepare a Special Report which shows the calculated doses and describes a course of action which should result in the limitation of dose to a real individual for 12 consecutive months to within the 10 CFR 50, Appendix I dose limits (i.e.,< 7.5 mrem to any organ for a quarter and< 15 mrem annual dose to any organ) and within the 40 CFR 190 limits (i.e.,

annual dose equivalent dose not to exceed 25 millirem to the whole body, 75 millirem to the thyroid, and 25 millirem to any other organ).

9.) The RPM will review and approve the report and submit the Special Report to Regulatory Affairs.

10.) Regulatory Affairs will review, approve and submit the report to the Director, Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555, within 30 days.

4.2. 7 Radioactive Effluent Release and Control Reporting Requirements 1.) Radioactive Effluent Release Report Page26 of43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 A. Paragraph (a) (2) of 10 CFR 50.36, requires that a Radioactive Effluent Release Report be made to the NRC annually. The report shall specify the quantity of each of the principal radionuclides released to unrestricted areas by liquid or gaseous effluents during the previous year. With the exception of the collection of hourly meteorological data (which is not applicable for the LACBWR site), the information submitted must be in accordance with Appendix B of Regulatory Guide 1.21 (Reference 2.8),

with data summarized on at least a quarterly basis. Except as required in 4.2.6.2, dose to members of the public from airborne effluents and associated release quantities have been calculated using a bounding assessment and should be used for reporting requirements. These values are presented in Appendix A.

B. This same report must include an assessment of radiation doses to members of the public from radioactive liquid effluents released beyond the effluent release boundary.

This report shall also contain any changes made to the ODCM during the previous twelve months.

C. The RPS or RPM will prepare the report and submit it to Regulatory Affairs.

D. Regulatory Affairs will review, approve and submit the report to the Director, Nuclear Reactor Regulation, U.S.

Nuclear Regulatory Commission, Washington, DC 20555.

The Radioactive Effluent Release Report must be submitted by March 1 for the previous calendar year.

2.) Radiological Effluent Monitoring and Control Program Non-Conformance Reporting A. If the Radiological Effluent Monitoring and Control Program are not being conducted in conformance with any of the requirements in Sections 4.1 or 4.2, notify the RPS.

B. The RPS or the RPM will prepare a Special Report, which identifies the causes for non-conformances or exceeding dose limits and defines the corrective actions, which have been or will be taken to assure that subsequent releases will be in compliance with the stated limits.

C. The RPM will review and approve the report and submit the Special Report to Regulatory Affairs.

Page27 of43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 D. Regulatory Affairs will review, approve and submit the report to the Director, Nuclear Reactor Regulation, U.S.

Nuclear Regulatory Commission, Washington, DC 20555, within 30 days.

4.3. Radiological Environmental Monitoring Program 4.3 .1 Radiological Environmental Monitoring Program (REMP) 1.) The REMP conforms to the guidance of Appendix I to 10 CPR Part 50 (Reference 2.5). The REMP provides the requirements for monitoring, sampling, analyzing and reporting radiation exposure and radionuclides in the environment resulting from direct radiation emanating from the LACBWR facility and from effluents released to the environment. These requirements have been established to ensure measurements of direct radiation and of radioactive material in potential exposure pathways to members of the public are performed.

2.) An Inter-laboratory Comparison Program, described in Section 4.4, has been established to ensure that independent checks on the precision and accuracy of the measurements of radioactive material in the environmental sample matrices are performed, as part of quality control for environmental monitoring.

3.) The radiological monitoring program provides measurements of radiation and of radioactive materials in those exposure pathways and for those radionuclides, which lead to the highest potential radiation exposures to individual members of the public resulting from site operations.

4.) The requirement for participation in an Interlaboratory Comparison Program is provided to ensure that independent checks on the precision and accuracy of the measurements of radioactive material in environmental samples are performed to demonstrate that the results are reasonably valid.

Page28 of43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 4.3.2 REMP Description Radiological Environmental Monitoring Program water and sediment samples are collected and analyzed in accordance with Table 5.3. The specific sample locations are listed in Ref. 2.10 "LACBWR Environmental Monitoring Program", which also contains specific guidance for personnel in the collection and analysis of each environmental sample. Environmental TLDs that are used to assess ambient dose conditions to the public and environmental air sampler locations established to trend radiological air conditions during D&D work are discussed and locations described in Ref. 2.10.

4.3.3 REMP Lower Limits of Detection (LLD)

The sampling techniques and counting equipment used for the analysis of samples collected as requirements of the REMP, meet LLDs calculated in accordance with criteria ofNUREG 0473, Rev. 2 (Reference 2.7). Table 5.4 lists the typical LLD values. The REMP LLDs for LACBWR are calculated as follows and are essentially the same as those found in NUREG-0473.

1.) Calculation of Lower Limits of Detection The LLD is the smallest concentration of radioactive material in a sample that will be detected with 95% probability, with 5%

probability of falsely concluding that a blank observation represents a "real" signal.

For a particular measurement system (which may include radiochemical separat1on):

4.66 Sb LLD=-----------

E x V x2.22 E6 x Y x exp (-A~t) 2.) Where:

A.) LLD= the a priori lower limit of detection (as micro curie per unit volume) (e.g., µCi/ml)

B.) Sb= standard deviation of the background counting rate or of the counting rate of a blank sample as appropriate (as counts per minute)

C.) E = counting efficiency (as counts per gamma)

Page29 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 D.) V = sample size (in units of volume)

E.) 2.22 E6 = number of transformations per minute per micro curie F.) Y = gamma abundance for isotope of interest G.) A= radioactive decay constant for the particular radionuclide H.) ~t = elapsed time between sample collection (or end of the sample collection period) and time of counting The above equation simplifies as follows for HP (Ge) gamma spectroscopy analysis of air samples:

LLDgamma = 4.66 x Sb for gamma emitters E x V x 2.22 E6 x Y .

Gamma spectroscopy LLD values vary for each radionuclide and with each analysis, depending on several factors such as count time, total background, interference from radionuclides with similar gamma energies, etc. In calculating LLD for HP (Ge) gamma spectroscopy, the background must include the typical radionuclides normally present in samples. The gamma background count rate is calculated from the background counts that are determined to be within+/- one FWHM (Full-Width-at-Half-Maximum) energy band about the energy of the gamma ray peak used for the quantitative analysis for that radionuclide. The principal gamma emitters for which LLD applies exclusively are the following: Mn-54, Co-60, Zn-65, Cs-134, and Cs-137. This does not mean that only these nuclides are to be reported.

4.4. Inter-laboratory Comparison Program An Inter-laboratory Comparison Program has been established to ensure that the analyses being performed to comply with the REMP are accurate and repeatable.

An offsite laboratory is used to supply NIST traceable or equivalent standard spiked sample media for analysis. The offsite laboratory supplies a report of the comparison of LACBWR results and the known radioactivity in the spiked standards. The Inter-laboratory Comparison is conducted annually. The results of this comparison are included in the annual Radiological Environmental Monitoring Report.

Page30 of 43

i LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 4.5. Radiologic al Environmental Monitoring Report Requirements 4.5.1 Radiological Environmental Monitoring Report 1.) The Radiological Environmental Monitoring Report is prepared annually. This report includes summarized and tabulated monitoring results, including interpretations and analysis of data trends, for environmental samples taken during the previous calendar year.

2.) In the event that some results are not available for inclusion with the report, the report shall be submitted noting and explaining the reasons for the missing results. The missing data shall be submitted as soon as possible in a supplementary report.

3.) The report also includes the following: a summary description of the Radiological Environmental Monitoring Program, a map of all sampling locations keyed to a table giving distances and directions from the plant, the results of the Interlaboratory Compariso n Program and a discussion of all analyses in which the LLD was not .

achievable.

4.) The RPS or RPM will prepare the Radiological Environmental Monitoring Report and submit it to Regulatory Affairs.

5.) Regulatory Affairs will review, approve and submit the report to the Director, Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555, by March 1 for the previous calendar year.

4.5.2 REMP Non-Conformance Reporting 1.) If the Radiological Environmental Monitoring Program is not being conducted as specified in Table 5.3 or if there are unexpected results, notify the RPS.

2.) The RPS or the RPM will investigate the non-conformance and include in the Radiological Environmental Monitoring Report a description of the reasons for not conducting the program as required, analysis of the cause of unexpected results and the plans for preventing a recurrence.

3.) The RPM will review and approve the report and submit the report to Regulatory Affairs.

4.) Regulatory Affairs will review, approve and submit the report to the U.S. Nuclear Regulatory Commission, Washington, DC 20555.

Page 31 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 5.) If the Inter-laboratory Comparisons not being performed, notify the RPS.

6.) The RPS or the RPM will investigate the non-conforma nce and include in the Radiological Environmental Monitoring Report documentation that the program was not performed and the corrective actions taken to prevent a recurrence.

7.) The RPM will review and approve the report and submit the report to Regulatory Affairs.

8.) Regulatory Affairs will review, approve and submit the report to the U.S. Nuclear Regulatory Commission, Washington, DC 20555.

9.) If radiological environmental sample analysis results are in excess of the Reporting Levels listed in Table 5.5, when averaged over any calendar quarter, notify the RPS.

10.) The RPS or the RPM will investigate the non-conforma nce and prepare a Special Report within 30 days, with a description of the reasons for exceeding these reporting levels.

11.) The RPM will review and approve the Special Report and submit the report to Regulatory Affairs.

12.) Regulatory Affairs will review, approve and submit the report to the U.S. Nuclear Regulatory Commission, Washington, DC 20555.

4.6 Program Changes 4.6.1 Changes to the ODCM:

1.) Shall be documented and records of reviews performed shall be retained as required by QAPP. This documentatio n shall contain:

A.) Sufficient Information to support the change together with the appropriate analyses or evaluations justifying the change(s); and B.) A determination that the change will maintain the level of radioactive effluent control required by 10 CPR 20.1302, 40 CPR Part 190, 10 CPR 50.36a, and Appendix I to 10 CPR Part 50 and not adversely impact the accuracy or reliability of effluent, dose, or set-point calculations.

C.) Documentation of the fact that the change has been reviewed and found acceptable by a Qualified Technical Review.

Page32 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 D.) Shall become effective after the approval of the Decommissioning Plant Manager on the date specified by the Qualified Technical Review.

E.) Shall be submitted to the Commission in the form of a complete, legible copy of the entire ODCM as a part of or concurrent with the Annual Radioactive Effluent Release Report for the period of the report in which any change to the ODCM was made effective.

Each change shall be identified by markings in the margin of the affected pages, clearly indicating the area of the page that was changed, and shall indicate the date (e.g., month/year) the change was implemented.

4.6.2 Changes to the Process Control Program (PCP) 1.) Changes to the PCP include those changes that affect the process or methodology, by which wastes are solidified, packaged to meet burial site form requirements, classified, or dewatered.

2.) Changes to the PCP:

A.)Shall be documented and records of reviews performed shall be retained, and B.)Shall contain sufficient information to support the change together with the appropriate analyses or evaluations justifying the change(s), and C.)Shall contain a determination that the change will maintain the overall conformance of the solidified waste product to existing requirements of Federal, State, or other applicable regulations, and D.)Shall become effective after review and approval by the Decommissioning Plant Manager.

5. ATTACHMENTS 5.1. Figure 5.1, Site Map Including Effluent Release Boundary/Exclusion Area 5.2. Table 5.1, Sample Liquid Release MPC Calculation Sheet 5.3. Table 5.2, Radioactive Liquid Waste Sampling and Analysis Requirements for Batch Releases to the Environment 5.4. Table 5.3, Radiological Environmental Monitoring and Environmental Air Samples Page33 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 5.5. Table 5.4, Environmental Sample Analyses Typical Lower Limit of Detection (LLD) Values 5.6. Table 5.5, Reporting Levels (RLs) for Radioactivity Concentrations in Environmental Samples Appendix A, Airborne Effluent Bounding Values Page34 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Figure 5.1 Site Map Including Effluent Release Boundary/Exclusion Area

~ME.-TE:oROLOGICAL, TOWER o*

0.2 It v ! l'!s 1

f f

ff Page 35 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Table 5.1 SAMPLE LIQUID WASTE RELEASE FORM 10 CFR20MPC ISOTOPE ACTIVITY .(µCi/ml) .. µCi/ml No. ofMPCs Gross Gamma 3.08E-6 Co-60 3 E-6 Cs-137 I E-6

////////////II!/I//// ///I///I//////II/////

TotalMPC Tritium I E-3 ENSURE THE ACTUAL EXISTENCE OF ANY ISOTOPE NOT LISTED IN THIS TABLE BEFORE ADDING IT TO THE TABLE.

MPCs at Discharge Point With Dilution Flow*:

X [_ __ _ _ _ _ _ _(Limit < 0.5)

(Total# (Discharge (Circ. Water ofMPCs) Flow GPM) Flow GPM)

[ Dilution Factor*

  • MPCs at discharge point without dilution flow shall use a Dilution Factor of 1 Performed By: _ _ _ _~~--~--~-~ --D_a_te_ :_ _ _ _~

Reviewed By:_~---~- ----~~~--= D-=a~te~:_ _ _ __

(Radiation Protection Manager)

Page 36 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Table 5.2 Radioactive Liquid Waste Sampling and Analysis Requirements for Batch Releases and Pump-Down Releases to the Environmen t Type of Activity ' . . Minimu.m Analysis Analysis (at *,. Sampling Frequ~n~y

\ ',**;

  • .Frequency
  • Principal gamma Each discharge - prior to 1 emitters<b) Prior to discharge discharge 2 Tritium Prior to discharge Each discharge Sr-90, Fe-55, Ni-59, Ni-63, Am-241, Pu-3 Prior to discharge Quarterly Composite (c) 238, Pu-239/240, Pu-241 NOTES (a) The principal gamma emitters for which the LLD specification will apply are Co-60 and Cs-137. This does not mean that only these nuclides are to be analyzed for and reported. Other gamma peaks, which are measurable and identifiable, together with the above radionuclides, shall also be identified and reported.

(b) Methods of calculating the Lower Limits of Detection (LLD) are shown in Section 4.3.3, using the criteria ofNUREG-0473 (Reference 2.7). LLD values for common radionuclides are shown in Table 5 .4.

(c) A composite sample is one made up of individual samples which are proportional to the quantity of liquid waste discharged and in which the method of sampling employed results in a specimen, which is representative of the liquid release.

Page37 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Table 5.3 Radiological Environmental Monitoring and Environmental Air Samples

1) Gamma isotopic analysis semi-
1. Waterborne annually on each sample Two (2) Semi-annually (River Water) 2) Tritium analysis semi-annually on each sample Gamma isotopic analysis semi-
2. River Sediment Two (2) Semi-annually annually on each sample
1) Gross Beta
3. Air particulates 2) Gamma Spectroscopy Four (4) Bi-weekly (environmental)

(a) Sample locations are given in LC-RP-PR-007, LACBWR Environmental Monitoring Program Page38 of 43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Table 5.4 Environmental Sample Analyses Typical Lower Limit of Detection (LLD) Values Sample Type

  • Analysis
  • Water Sediment

, ~' ~

Air Particulates C,

  • pCi/1 pCi/kgDry . µCi/ml, Gross Alpha NIA NIA 4.0 E-16*

Gross Beta NIA NIA 8.5 E-16*

H-3 3500 NIA NIA Mn-54 15 NIA NIA Co-60 15 NIA 4.0E-14 Cs-134 15 150 5 E-14 Cs-137 18 180 6 E-14

  • When using a Tennelec Counter Page 39 of 43

l LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 Table 5.5 Reporting Levels (RLs) for Radioactivity Concentrations in Environmental Water Samples Analysis WatJr (pCillf H-3 20,000 Mn-54 1,000 Co-60 300 Cs-134 30 Cs-137 50 Page40 of 43

LC-RP-PG-00 5 Offsite Dose Calculation Manual Revision 8 APPENDIX A AIRBORNE EFFLUENT BOUNDING VALVES Airborne Effluent Bounding Assessment dose rates and release quantities are calculated in LC-RP-TSD-004, Revision 1. The bounding assessment dose-rates assume releases occur during the assumed 60 day time period of decommission ing activities; 2-10 hour shifts per day, 5 days per week for 10 weeks for the Reactor (RX) Building, and 2-10 hour shifts per day for 10 days for demolition of the bio-shield wall.

DOSE (For Duration of Decommissioning):

Areas outside the Effluent Release Boundary (100 m) and inside the Exclusion Area Boundary Coal Plant Employees (40 hrs/week)

TEDE 1.470 mrem Total organ dose to bone 8.165 mrem Areas outside the Exclusion Area Boundary to Members of the Public (300 m)

TEDE 4.408 mrem Total organ dose to bone: 2.642mrem A VERAGE WEEKLY CONCENTRA TIONS ( for select isotopes)

'l'co-60 7.76E-15 uCi/ml

'l'cs-137 6.61E-14 uCi/ml

'l'sr-90 6.85E-16 uCi/ml

\j/Pu-241 5.85E-16 uCi/ml

\j/Am-241 6.23E-17 uCi/ml

'I' H-3 2.30 E-11 uCi/ml Page41 of43

LC-RP-PG-005 i

Offsite Dose Calculation Manual Revision 8 I

I APPENDIX A (Cont) I AIRBORNE EFFLUENT BOUNDING VALUES CURIES RELEASED - RX Building Demolition The curie content released per 10-hour shift (Ci 10 hr) during RX Building demolition:

Isotope Ci10 hr Fe-55 l.361E-09 Ni-59 3.584E-09 Co-60 2.711E-08 Ni-63 2.383E-08 Sr-90 2.396E-09 Nb-94 l.189E-11 Tc-99 l.393E-11 Cs-137 2.31 lE-07 Eu-152 l.63 lE-10 Eu-154 l.096E-10 Eu-155 7.817E-11 Np-237 l.065E-10 Pu-238 9.946E-11 Pu-239/240 9.200E-11 Pu-241 2.048E-09 Am-241 2.l 79E-10 Am-243 6.090E-12 Cm-243/244 l.295E-11 H-3 8.403E-05 Page42 of43

LC-RP-PG-005 Offsite Dose Calculation Manual Revision 8 APPENDIX A (Cont)

AIRBORNE EFFLUENT BOUNDING VALUES CURIES RELEASED - Bio-Shield Wall Demolition The curie content released per 10-hour shift (Ci 10 hr) during Bio-Shield Wall demolition:

Isotope Ci10 hr Co-60 8.039E-07 Nb-94 2.126E-09 Cs-137 1.151E-07 Eu-152 l.038E-05 Eu-154 4.480E-07 Eu-155 4.21 lE-09 Fe-55 l.312E-08 Ni-59 l.SSOE-07 Ni-63 1.030E-06 Sr-90 l.036E-07 Tc-99 6.021E-10 Np-237 , 4.604E-09 Pu-238 l.339E-09 Pu-239/240 l.264E-09 Pu-241 2.097E-08 Am-241 4.00lE-09 Am-243 2.633E-10 Cm-243/244 3.115E-10 H-3 3.322E-01 Page43 of 43

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