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Category:Environmental Monitoring Report
MONTHYEARML23291A1092023-10-23023 October 2023 Subsequent License Renewal Application Requests for Confirmation of Information Environmental Review L-MT-23-019, Submittal of 2022 Annual Radiological Environmental Operating Report2023-05-10010 May 2023 Submittal of 2022 Annual Radiological Environmental Operating Report L-MT-22-049, Industry Groundwater Protection Initiative Special Report2022-12-15015 December 2022 Industry Groundwater Protection Initiative Special Report L-MT-22-017, 2021 Annual Radiological Environmental Operating Report2022-05-11011 May 2022 2021 Annual Radiological Environmental Operating Report L-MT-22-018, 2021 Annual Radioactive Effluent Release Report2022-05-11011 May 2022 2021 Annual Radioactive Effluent Release Report ML21133A4952021-05-13013 May 2021 2020 Annual Radiological Environmental Operating Report L-MT-21-033, 2020 Annual Radioactive Effluent Release Report2021-05-13013 May 2021 2020 Annual Radioactive Effluent Release Report L-MT-20-013, 2019 Annual Radiological Environmental Operating Report2020-05-14014 May 2020 2019 Annual Radiological Environmental Operating Report L-MT-20-014, 2019 Annual Radioactive Effluent Release Report2020-05-14014 May 2020 2019 Annual Radioactive Effluent Release Report L-MT-18-029, 2017 Annual Radiological Environmental Operating Report2018-05-10010 May 2018 2017 Annual Radiological Environmental Operating Report L-MT-17-039, 2016 Annual Radioactive Effluent Release Report and Offsite Dose Calculation Manual(Enclosure 2)2017-05-10010 May 2017 2016 Annual Radioactive Effluent Release Report and Offsite Dose Calculation Manual(Enclosure 2) L-MT-16-035, Corrections to 2011, 2012, 2013, and 2014 Annual Radiological Environmental Operating Reports2016-10-20020 October 2016 Corrections to 2011, 2012, 2013, and 2014 Annual Radiological Environmental Operating Reports L-MT-16-030, Transmittal of 2015 Annual Radiological Environmental Operating Report2016-05-12012 May 2016 Transmittal of 2015 Annual Radiological Environmental Operating Report L-MT-16-022, Radioactive Effluent Release Report for 20152016-05-12012 May 2016 Radioactive Effluent Release Report for 2015 L-MT-16-024, Flood Hazard Reevaluation Report2016-04-21021 April 2016 Flood Hazard Reevaluation Report L-MT-15-036, 2014 Annual Radiological Environmental Operating Report2015-05-12012 May 2015 2014 Annual Radiological Environmental Operating Report ML15132A6222015-05-12012 May 2015 2014 Radioactive Effluent Release Report L-MT-14-012, 2013 Radioactive Effluent Release Report2014-05-15015 May 2014 2013 Radioactive Effluent Release Report L-MT-13-042, Submittal of 2012 Annual Radiological Environmental Operating Report2013-05-10010 May 2013 Submittal of 2012 Annual Radiological Environmental Operating Report ML13135A0122012-12-31031 December 2012 Radioactive Effluent Release Report for January 1 - December 31, 2012 L-MT-12-042, Submittal of 2011 Annual Radiological Environmental Operating Report2012-05-10010 May 2012 Submittal of 2011 Annual Radiological Environmental Operating Report L-MT-11-020, 2010 Annual Radiological Environmental Operating Report2011-05-12012 May 2011 2010 Annual Radiological Environmental Operating Report L-MT-11-021, Submittal of 2010 Radioactive Effluent Release Report2011-05-12012 May 2011 Submittal of 2010 Radioactive Effluent Release Report ML1013900582010-05-14014 May 2010 Monticello Nuclear Generating Plant - 2009 Annual Radiological Environmental Operating Report L-MT-10-032, Annual Report to the Us NRC Radiological Environmental Monitoring Program2009-12-31031 December 2009 Annual Report to the Us NRC Radiological Environmental Monitoring Program ML0920501892009-04-30030 April 2009 Parr Reservoirs Fisheries Surveys: Winter Final Report L-MT-09-036, Annual Report for the NRC, Radiological Environmental Monitoring Program, January 1 - December 31, 20082008-12-31031 December 2008 Annual Report for the NRC, Radiological Environmental Monitoring Program, January 1 - December 31, 2008 ML0915405192008-05-14014 May 2008 Enclosures 1 and 2 - Radioactive Effluent Release Report and Off-Site Radiation Dose Assessment for January 1 - December 31, 2008 L-MT-07-031, Annual Radiological Environmental Operating Report2007-04-20020 April 2007 Annual Radiological Environmental Operating Report ML0612806172006-05-0404 May 2006 2005 Annual Radiological Environmental Operating Report ML0612902442005-12-31031 December 2005 Radioactive Effluent Release Report for January 1 - December 31, 2005 ML0532605652005-11-30030 November 2005 November 2005 Mississippi River Mussel Survey Summary Prepared by Nuclear Management Company, LLC L-MT-05-042, ODCM-APP-C, Rev 0, Appendix C.2005-05-0909 May 2005 ODCM-APP-C, Rev 0, Appendix C. L-MT-05-041, 2004 Annual Radiological Environmental Operating Report2005-04-29029 April 2005 2004 Annual Radiological Environmental Operating Report ML0520103862005-03-30030 March 2005 Xcel Energy'S Air Emission Inventory Reports for 2004 to the Minnesota Pollution Control Agency ML0520104802005-01-31031 January 2005 Xcel Energy/Usfws Avian Protection Memorandum of Understanding, Semi-Annual Report: Covering July 1, 2004 Through December 31, 2004 Reporting Period ML0520103272004-12-31031 December 2004 Offsite Radiation Dose Assessment for January 1 - December 31, 2004 for Monticello Nuclear Generating Plant ML0532605692004-12-31031 December 2004 Minnesota Statewide Mussel (Bivalvia: Unionidae) Survey: 2003-2004 ML0520103032004-10-0505 October 2004 Letter from Minnesota Pollution Control Agency to Xcel Energy Forwarding Summary of Pollutant Emissions for 2003 ML0520104782004-07-30030 July 2004 Xcel Energy/Usfws Avian Protection Memorandum of Understanding, Semi-Annual Report: Covering January 1, 2005 Through June 30, 2004 Reporting Period L-MT-04-030, 2003 Annual Radiological Environmental Operating Report2004-05-14014 May 2004 2003 Annual Radiological Environmental Operating Report ML0520102422004-04-24024 April 2004 U.S. EPA Green Book - Nonattainment Status for Each County by Year from the Monticello Environmental Site Audit ML0520103002004-03-30030 March 2004 Xcel Energy'S 2003 Air Emission Inventory Reports to the Mn Pollution Control Agency ML0520105192004-01-28028 January 2004 Xcel Energy/Usfws Avian Protection Memorandum of Understanding, Semi-Annual Report #4: Covering August 3, 2003 Through December 31, 2003 Reporting Period ML0520105082004-01-0101 January 2004 Environmental Monitoring Program: 2002 - 2003 Report ML0520103072003-12-31031 December 2003 Offsite Radiation Dose Assessment for January 1 - December 31, 2003 for Monticello Nuclear Generating Plant ML0520102992003-10-0606 October 2003 Letter from Minnesota Pollution Control Agency to Xcel Energy Forwarding Summary of Pollutant Emissions for 2002 ML0520105162003-08-27027 August 2003 Xcel Energy/Usfws Avian Protection Memorandum of Understanding, Semi-Annual Report #3: Covering February 2, 2003 Through August 2, 2003 Reporting Period ML0314102772003-05-0909 May 2003 2002 Radioactive Effluent Release Report. Attachment 3 (ODCM-08.01 Through ODCM-APP-C) ML0314102452003-05-0909 May 2003 2002 Radioactive Effluent Release Report. Attachment 1 Through 3 (ODCM-Index Through ODCM-07.01) 2023-05-10
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MONTICELLO NUCLEAR GENERATING PLANT Offsite Radiation Dose Assessment for January 1, - December 31, 2004 An assessment of radiation dose due to releases from the Monticello Nuclear Generating Plant during 2004 was performed in accordance with the Offsite Dose Calculation Manual (ODCM). Computed doses were well below the 40 CFR 190 Standards and 10 CFR Part 50, Appendix I Guidelines.
Offsite dose calculation formulas and meteorological data from the Offsite Dose Calculation Manual were used in making this assessment. Source terms were obtained from the Radioactive Effluent Release Report for 2004.
Offsite Dose from Gaseous Releases (ODCM -08.01 section 2.1.3)
Computed dose due to gaseous releases are reported in Table 1. Critical receptor location and pathways for organ dose are reported in Table 2. Whole body and organ dose due to gaseous releases are a small percentage of Appendix I Guidelines.
Offsite Dose From Liquid Releases (ODCM -08.01 section 2.1.3)
Dose from liquid releases are listed in Table 1. Dose is based on release of Turbine Building Normal Drain Sump water released in the fourth quarter with H-3 activity present. Whole body and organ dose due to liquid releases are a small percentage of Appendix I Guidelines.
Dose to Individuals Due to Their Activities Inside the Site Boundarv (ODCM-08.01 section 2.1.3)
Computed dose to the whole body, skin and organ (thyroid), are reported in Table 1. There are several groups of concern, Security Officers training at the rifle range at the old EPA station, Security Officers at the Interim Barrier Fence Gate House and XCEL Energy Company transmission and distribution crews working in the substation. Use of a very conservative assumption of 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br />s/week spent inside the site boundary by these groups would conservatively represent the most exposed individual. The annual whole body, skin and organ dose was computed using plant stack and reactor building vent X/Q and D/Q values for the Security Officers Training trailer located near the old EPA station (a bounding location due to predominant wind direction and nearness to the release points) as input to the GASPAR code. This computed dose was reduced by the factor of 40/168 to account for limited occupancy.
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Dose to the Likely Most Exposed Member of the General Public from Reactor Releases and Other Nearby Uraniumn Fuel Cycle Sources (ODCM -08.01 section 2.1.4)
There are no other uranium fuel facilities in the vicinity of the Monticello site. The only artificial source of exposure to the general public in addition to the plant effluent releases is from direct radiation of the reactor and the steam turbines.
Environmental TLDs were used to provide data on direct and skyshine radiation dose and the GASPAR code was used to provide data on dose from airborne pathways.
TLD results from the area of the site boundary and the 5 mile ring show no significant differences between these TLD's and the control TLD's.
Therefore, the likely most exposed member of the general public will not receive an annual radiation dose from reactor effluent releases and all other fuel cycle activities in excess of 40 CFR 190 standards of 25 millirem to the whole body, 75 millirem to the thyroid, and 25 millirem to any other organ.
Changes in Land Use and Non Obtainable Milk or Vegetable Samples (ODCM -08.01 sections 2.1.8 and 2.1.9)
There were no changes in land use resulting in significant increases in calculated doses. The Critical Receptor location changed from the Trefethen residence to the Wise residence due to Mr. Wise planting a garden this year. Milk samples were unavailable at sample location M-28 (Hoglund Farm) from 6/30/04 to 10/20/04 due to the farm being temporarily out of business. Land use census results show that there were no other indicator sample locations to replace this farm. Milk production and sampling has resumed at the Hoglund farm starting 10/18/04. There were no vegetable samples that could not be obtained during this reporting period.
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Table 1 Offsite Radiation Dose Assessment - Monticello PERIOD: January 1, through December 31,2004 Maximum Site Boundary Gamma Air Dose 0.013 (mrad/year) 10 Maximum Site Boundary Beta Air Dose 0.01 (mrad/year) 20 Maximum Off-Site Dose to Any Organ (mrem/year) 0.037 15 Maximum Dose to the Likely Most Exposed Member of the General Public (mrem/year)
Whole Body 0.022 5 Skin 0.037 15 Max Organ (Skin) 0.037 15 Maximum Off-Site Dose (mrem)
Whole Body 1.94E-10 3 Max Organ (All except bone) 1.94E-10 10 Maximum Dose to Individuals due to their Activities Inside the Site Boundary (mrem)
Whole Body 0.009 25 Skin 0.011 75 Max Other Organ (Thyroid) 0.009 25 Page 3 of 5
I Table 2 Offsite Radiation Dose Assessment - Monticello Supplemental Information PERIOD: January 1, through December 31, 2004 Maximum Site Boundary Dose Location (from Reactor Building Vents)
Sector SSE Distance (miles) 0.40 Security Training Trailer Sector ESE Distance from Plant Stack (miles) 0.3 Distance from Reactor Building Vents 0.4 Critical Receptor Location Sector SSW Distance from Reactor Building Vents (miles) 0.64 Pathways Plume, Ground, Inhalation, Vegetable Age Group CHILD OrEan SKIN St. Paul Drinking Water Intake Location Pathways Age Group Drinking Water Drinking Water, Fish Organ Infant Adult Dilution Factor (drinking water) Whole Body GI Tract 7:1 7:1 Page 4 of 5
Bases for Radiation Dose Statements Thermoluminescent dosimeters (TLD) are stationed around MNGP to measure the ambient gamma radiation field. Monitoring stations are placed near the site boundary and approximately five (5) miles from the reactor, in locations representing sixteen (16) compass sectors. Other locations are chosen to measure the radiation field at places of special interest such as nearby residences, meeting places and population centers. Control sites are located further than ten (10) miles from the site, in areas that should not be affected by plant operations. The results from the TLD's are reported in the Annual Radiological Environmental Monitoring Report (REMP).
The results from this effort indicated no excess dose to offsite areas.
Additionally, NUREG-0543, METHODS FOR DEMONSTRATING LWR COMPLIANCE WITH THE EPA URANIUM FUEL CYCLE STANDARD (40 CFR PART 190) states in section IV, "As long as a nuclear plant site operates at a level below the Appendix I reporting requirements, no extra analysis is required to demonstrate compliance with 40 CFR Part 190". The organ and whole body doses reported in Table 1 are determined using 10 CFR 50 Appendix I methodology. The doses reported are well below the limits of Appendix I.
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