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Entergy Nuclear Vermont Yankee, LLC, Radioactive Effluent Release Report for 2011 Including Annual Radiological Impact on Man
	ML12139A108
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	05/08/2012
From:	Cumming E; Entergy Nuclear Vermont Yankee
To:	; Office of Nuclear Reactor Regulation
References
	Download: ML12139A108 (59)
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RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2011 INCLUDING ANNUAL RADIOLOGICAL IMPACT ON MAN Entergy Nuclear Vermont Yankee, LLC Docket No. 50-271 License No. DPR-28 Prepared by: ____ e _'_- / _____Edward R. Cumming, CHP, Advisory S ntist, AREVA Inc. Date Preparation coordinated I bP)Stephen P. Skibniowsky, Senior Environmental Specialist 6 ate Reviewed by: ./___Rick Heathwaite, e rf visor Date Approved for Distribution:

0) A / S -6 l3.CJeffery A. Hardy, Chemistry Manager Date TABLE OF CONTENTS Page 1.0 IN T R O D U C T IO N ..............................................................................................................................................

1 2.0 M ETEO R O LO G IC A L D A TA ............................................................................................................................

2 3.0 D O SE A SSE SSM EN T .......................................................................................................................................

3 3.1 D OSES FROM LIQUID EFFLUENTS

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3 3.2 D OSES FROM N OBLE G A SES ...........................................................................................................................

4 3.3 DOSES FROM IODINE- 13 1, IODINE- 13 3, TRITIUM, CARBON- 14, AND RADIONUCLIDES IN PARTICULATE FORM WITH HALF-LIVES GREATER THAN 8 DAYS ........................................................................................

4 3.4 WHOLE BODY DOSES IN UNRESTRICTED AREAS FROM DIRECT RADIATION

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5 3.5 DOSES FROM ON-SITE DISPOSAL OF SEPTIC WASTE, COOLING TOWER SILT AND SOIL ...........................

6 3.6 O N-SITE RECREATIONAL A CTIVITIES

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6 R E F E R E N C E S ..........................................................................................................................................................

7 APPENDIX A -SUPPLEMENTAL INFORMATION

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A- I APPENDIX B -LIQUID HOLDUP TANKS ........................................................................................................

B-1 APPENDIX C -RADIOACTIVE LIQUID EFFLUENT MONITORING IN ST R U M EN TA T IO N ...............................................................................................................

C -1 APPENDIX D -RADIOACTIVE GASEOUS EFFLUENT MONITORING IN STRUM EN TA TIO N ................................................................................................................

D -1 APPENDIX E -RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM .....................................

E-1 APPENDIX F -LAND USE CENSUS ..................................................................................................................

F-1 APPENDIX G -PROCESS CONTROL PROGRAM ............................................................................................

G-1 APPENDIX H -OFF-SITE DOSE CALCULATION MANUAL .....................................................................

H-1 APPENDIX I -RADIOACTIVE LIQUID, GASEOUS AND SOLID WASTE TRE A TM EN T SY STEM S ............................................................................................................

I-I APPENDIX J -ON-SITE DISPOSAL OF SEPTIC/SILT/SOIL WASTE ............................................................

J-1 ii LIST OF TABLES IA Gaseous Effluents

-Summation of All Releases 8 IB Gaseous Effluents

-Elevated Releases 10 1C Gaseous Effluents

-Ground Level Releases 12 ID Gaseous Effluents

-Non-routine Releases 14 2A Liquid Effluents

-Summation of All Releases 15 2B Liquid Effluents

-Routine Releases 17 3 Solid Waste and Irradiated Fuel Shipments 19 4A Maximum Off-Site Doses/Dose Commitments to Members of the Public from 21 Liquid and Gaseous Effluents for 2011 (1OCFR50, Appendix I)4B Maximum Annual Dose Commitments from Direct External Radiation, 22 Plus Liquid and Gaseous Effluents for 2011 (40CFR190) 4C Receptor Locations 23 4D Usage Factors for Environmental Pathways 24 4E Environmental Parameters for Gaseous Effluents 25 4F Environmental Parameters for Liquid Releases (Tritium)

Via Groundwater 27 5A to 5H Annual (2011) Summary of Lower Level Joint Frequency Distribution 28-35 6A to 6H Annual (2011) Summary of Upper Level Joint Frequency Distribution 36-43 iii Radiological Effluent Release Report for 2011[Including Annual Radiological Impact on Man]Entergy Nuclear Vermont Yankee, LLC

1.0 INTRODUCTION

Tables 1 through 3 list the recorded radioactive liquid and gaseous effluents and solid waste shipments for the year, with data summarized on a quarterly basis for both liquids and gases. Table 4A summarizes the estimated radiological dose commitments from all radioactive liquid and gaseous effluents released during the year 2011 in response to the ALARA objectives of 1 OCFR50, Appendix I.Also included in Table 4A is the estimate of direct dose from fixed station sources along the limiting west site boundary line. Tables 5A through 6H report the cumulative joint frequency distributions of wind speed, wind direction, and atmospheric stability for the 12-month period, January to December 2011. Radioactive effluents reported in Tables 1 and 2 were used to determine the dose to the maximum exposed individual for 2011.As required by ODCM Section 10.1, (Reference

1) dose commitments resulting from the release of radioactive materials in liquids and gases during the reporting period were estimated in accordance with the plant's "Off-Site Dose Calculation Manual" (ODCM). These dose estimates were made using a"Method II" analysis as described in the ODCM, and as reported in Tables 4A and 4B of this report. A"Method II" analysis incorporates the methodology of Regulatory Guide 1.109 (Reference

2) and actual measured meteorological data recorded concurrently with the quarterly reporting period.As required by ODCM Section 10.1, this report shall also include an assessment of the radiation doses from radioactive effluents to member(s) of the public due to allowed recreational activities inside the site boundary during the year. During this reporting period, no recreational activity was permitted and, therefore, there is no associated dose assessment as stated in Section 3.6.Assessment of radiation doses (including direct radiation) to the likely most exposed real member(s) of the public for the calendar year for the purposes of demonstrating conformance with 40CFR190, "Environmental Radiation Protection Standards for Nuclear Power Operations," are also required to be included in this report if the conditions indicated in ODCM 3/4.4, "Total Dose," have been exceeded during the year. Since the conditions indicated in the action statement under ODCM 3/4.4 were not entered into during the year, no additional radiation dose assessments are required.

However, Table 4B does provide the combination of doses and dose commitments from plant effluents and direct radiation sources for the limiting member of the public off-site as a demonstration of compliance with the dose standards of 40CFR190.All calculated dose estimates for members of the public at the site boundary or beyond for the 2011 annual reporting period are below the dose criteria of 10CFR Part 50, Appendix I, and 40CFR190.Appendices B through H indicate the status of reportable items per the requirements of ODCM Section 10.1.1 2.0 METEOROLOGICAL DATA Meteorological data were collected in 2011 from the site's 300-foot meteorological tower located approximately 2,200 feet northwest of the reactor building, and about 1,400 feet from the plant stack. The 300-foot tower is approximately the same height as the primary plant stack (308 feet) and is designed to meet the requirements of Regulatory Guide 1.23 for meteorological monitoring.

In mid-2009, the tower was moved to a location approximately 200 feet northwest of the original location.X/Q and D/Q values for elevated releases were derived for all receptor points from the site meteorological record for each quarter using a straight-line airflow model. All dispersion factors have been calculated employing appropriate source configuration considerations, as described in Regulatory Guide 1.111 (Reference 3). A source depletion model as described in "Meteorology and Atomic Energy -1968" (Reference

4) was used to generate deposition factors, assuming a constant deposition velocity of 0.01 m/sec for all stack (elevated) releases.

Changes in terrain elevations in the site environment were also factored into the meteorological models as appropriate.

In the event of a ground-level release, X/Q and D/Q values would be derived for the site boundary receptor points from the site meteorological record for each quarter using a straight-line airflow model.During this reporting period, there were no ground level releases and therefore no associated dose impact.Table 4C lists the distances from the plant stack to the nearest site boundary, resident, and milk animal in each of the 16 principle compass directions as determined during the 2011 land use census. These locations were used in the calculation of atmospheric dispersion factors. The meteorological model was also executed for each calendar quarter to determine the location of the predicted maximum ground level air concentration from elevated releases from the plant's primary vent stack. These locations were included in the assessment of effluent doses along with identified points of interest from the annual land use census.2 3.0 DOSE ASSESSMENT 3.1 Doses From Liquid Effluents ODCM 3/4.2.2 limits total body doses (1.5 mrem per quarter, and 3 mrem per year) and organ doses (5 mrem per quarter, and 10 mrem per year) from liquid effluents to a member of the public to those specified in IOCFR Part 50, Appendix I. By implementing the requirements of IOCFR Part 50, Appendix I, ODCM 3/4.2.2 assures that the release of radioactive material in liquid effluents will be kept "as low as is reasonably achievable." There were no recorded routine liquid radioactive waste discharges during the report period.However, an abnormal release to the Connecticut River is postulated due to a leak in an underground pipe tunnel that runs between the Advanced Offgas (AOG) system building and other plant buildings which allowed accumulated piping system leakage to enter the subsurface groundwater adjacent to the plant structures.

The existence of the leak was first recognized in January 2010, when a river shoreline Protected Area Boundary monitoring well sample was reported to have detectable tritium. The addition of other monitoring wells and subsequent analysis defined the extent of the affected groundwater plume moving toward the river and helped locate the source of the leak, which was stopped in February 2010.Estimates of tritium-contaminated ground water released from the site are based on Protected Area Boundary monitoring well data collected throughout 2011, and hydrological modeling of ground water movement in the affected zone impacted by the pipe tunnel leak. Using a conservative estimate of groundwater flow through the affected area toward the river on a quarterly basis, an estimate of the total potential tritium released from the site during each quarter of 2011 was generated and reported in Table 2A.For the projected ground water flow into the Connecticut River in 2011, the dose impact to the maximum exposed individual (MEI) assumed the following exposure pathways:

(1) ingestion of fish (taken from Vernon Pond), (2) ingestion of vegetables and fresh leafy produce irrigated by water taken from the river below Vernon Dam, (3) ingestion of milk and meat from animals that were fed irrigated crops and drinking water taken from the river below Vernon Dam, and (4) potable water for a hypothetical individual drawing drinking water fed by the river below Vernon Dam. For Vernon Pond (river area adjacent to the plant property), the near shore mixing zone associated with the fish ingestion pathway is conservatively taken as 1% of the minimum recorded monthly river flow (4,323 cfs in July 2011) for dilution.

All irrigation exposure pathways for the consumption of food products grown with irrigated water occur below Vernon Dam and assume the lowest 2011 quarterly average growing season river flow value (12,112 cfs in the third quarter) for environmental mixing. For the drinking water pathway, river flow mixing is assumed to occur below Vernon Dam and uses the lowest annual quarterly average river flow (11,067 cfs in the first quarter)as a conservative estimate of river dilution for all four quarters of the year. The dose models are taken from US NRC Regulatory Guide 1.109, Revision 1, and use environmental parameters for exposure pathways listed in Tables 4D and 4F.The maximum estimated quarterly and annual whole body and organ doses to the limiting age group from liquid releases are reported in Table 4A. These estimated doses are well below the IOCFR Part 50, Appendix I dose criteria of ODCM 3/4.2.2. Table 4B provides an estimate of the total annual dose impact (including contributions from liquids) associated with the highest exposed member of the public for demonstration of compliance to the dose standard contained in 40CFR Part 190 for the uranium fuel cycle.3 3.2 Doses From Noble Gases ODCM 3/4.3.2 limits the gamma air dose (5 mrad per quarter, and 10 mrad per year) and beta air (10 mrad per quarter, and 20 mrad per year) dose from noble gases released in gaseous effluents from the site to areas at and beyond the site boundary to those specified in 10CFR Part 50, Appendix I. By implementing the requirements of IOCFR Part 50, Appendix I, ODCM 3/4.3.2 assures that the releases of radioactive noble gases in gaseous effluents will be kept "as low as is reasonably achievable." There were no recorded noble gas releases during the report period, and therefore, no dose impact.3.3 Doses From Iodine-131, Iodine-133, Tritium, Carbon-14, and Radionuclides in Particulate Form With Half-Lives Greater Than 8 Days ODCM 3/4.3.3 limits the organ dose to a member of the public from iodine-131, iodine-133, tritium, carbon-14, and radionuclides in particulate form with half-lives greater than 8 days (hereafter called iodines and particulates) in gaseous effluents released from the site to areas at and beyond the site boundary to those specified in IOCFR Part 50, Appendix 1 (7.5 mrem per quarter, and 15 mrem per year). By implementing the requirements of 1OCFR Part 50, Appendix I, ODCM 3/4.3.3 assures that the releases of iodines and particulates in gaseous effluents will be kept "as low as is reasonably achievable." During 2011, a single frac tank was used on the Vermont Yankee site to temporarily store (outdoors) tritium-contaminated water extracted from onsite groundwater wells. The quantity of tritium released to the atmosphere through the evaporation of water from this frac tank was estimated, and the dose consequence to the maximally exposed individual was calculated.

Exposure pathways that could exist as a result of the release of iodines and particulates to the atmosphere include external irradiation from activity deposited onto the ground surface, inhalation, and ingestion of vegetables, meat and milk. Dose estimates were made at the site boundary and nearest resident in each of the sixteen principal compass directions, as well as all milk animal locations within five miles of the plant. The nearest resident and milk animals in each sector were identified by the most recent Annual Land Use Census as required by ODCM 3/4.5.2 (see Table 4C). Conservatively, a vegetable garden was assumed to exist at each milk animal and nearest resident location.

Furthermore, the meat pathway was assumed to exist at each milk cow location since this data category is not part of the annual land use census.Doses were also calculated at the point of maximum ground level air concentration of radioactive materials in gaseous effluents and included the assumption that the inhalation, vegetable garden, and ground plane exposure pathways exist for an individual with a 100 percent occupancy factor.It is assumed that milk and meat animals are free to graze on open pasture during the second and third quarters with no supplemental feeding. This assumption is conservative since most of the milk animals inventoried in the site vicinity are fed stored feed throughout the entire year with only limited grazing allowed during the growing season. It has also been assumed that only 50 percent of the iodine deposited from gaseous effluent is in elemental form (12) and is available for uptake (see p. 6, Reference 2).During the non-growing season (first and fourth quarters), the milk animals are assumed to receive only stored feed. During the growing season (second and third quarters), all animal feed is assumed to be derived from fresh pasture. Usage factors for gaseous effluents are listed by age group and pathway in Table 4D.Table 4E provides other dose model parameter assumptions used in the dose assessments.

4 In June 2009, the NRC issued Revision 2 of Regulatory Guide 1.21 (Reference

7) which introduced the term "principal radionuclide" in a risk informed or dose context. A radionuclide can be considered a principal radionuclide if it contributes either (1) greater than 1 percent of the 10 CFR Part 50, Appendix I design objective dose for all radionuclides in the type of effluent being considered, or (2) greater than 1 percent of the activity of all radionuclides in the type of effluent being considered.

In addition to natural production in the environment, Carbon-14 is also produced in nuclear reactors as a function of power output, but at amounts much less than those generated naturally or from past weapons testing. Since the time of the earlier publication of Regulatory Guide 1.21 (Revision

1) in 1974, commercial nuclear power plants have decreased total radioactive effluents (other than Carbon-14) through improved fuel performance and waste management practices to the point today that Carbon-14 could be considered a principal radionuclide under today's definition, and therefore has been included in the assessment of dose to the public from gaseous effluent releases for 2011.The primary exposure pathways associated with Carbon-14 include inhalation and ingestion of food products that have incorporated Carbon-14 (in the form of C0 2) via photosynthesis.

A full year's consumption of food products are assumed to be grown from the highest impacted garden during the growing season (2nd and 3rd quarters).

It is also assumed that the garden grows sufficient mass to support ingestion throughout the year (i.e., the annual dose to the individual is from consumption during all four quarters).

The resultant organ doses were determined after adding the contributions from all pathways at each location.

Doses were calculated for the whole body, GI-tract, bone, liver, kidney, thyroid, lung and skin for adults, teenagers, children, and infants. The maximum estimated quarterly and annual organ doses to any age group due to iodines and particulates at any of the off-site receptor locations are reported in Table 4A.These estimated organ doses are well below the 10CFR Part 50, Appendix I dose criteria of ODCM 3/4.3.3.Table 4B provides an estimation of the total annual dose impact (including contributions from iodine and particulates) associated with the highest exposed member of the public for demonstration of compliance to the dose standard contained in 40CFR Part 190 for the uranium fuel cycle.3.4 Whole Body Doses in Unrestricted Areas From Direct Radiation The major dose in unrestricted areas occurs at the west site boundary, and mainly consists of direct and skyshine radiation from N-16 decay in the Turbine Building steam cycle during power operations.

Because of the orientation of the Turbine Building on the site, and the shielding effects of the adjacent Reactor Building, only the seven westerly sectors (SSW to NNW) see any significant direct radiation.

A correlation method was derived, based directly on site boundary exposure rate and in-plant Main Steam Line Radiation Monitor measurements, that allows changes in the N-16 carryover in the main steam flow to be directly related to changes in the site boundary dose. This correlation is documented in section 6.11.1 (Equation 6-27a) of the ODCM. This method was used to calculate direct dose within the area of the maximum site boundary location from radiation sources in the steam cycle.The other fixed sources of direct and scatter radiation to the site boundary are from the Independent Spent Fuel Storage Installation (ISFSI), the low level radioactive materials stored in the North Warehouse, the Low Level Waste Storage Pad Facility, and old turbine rotors and casings in the Turbine Storage Facility.

The annual dose is based on dose rate measurements in these storage facilities and is determined to 5 occur at the same most restrictive site boundary dose location as that for N- 16 shine from the Turbine Building.The estimated direct radiation dose from all major sources combined for the most limiting site boundary location is listed in Table 4A. These site boundary doses assume a 100 percent occupancy factor, and take no credit for the shielding effect of any residential structure, and no credit for actual occupancy time is taken (i.e., occupancy is equal to 100%).Table 4B lists the combination of direct radiation doses at the limiting site boundary location and the maximum offsite dose from gaseous and liquid effluents for the purpose of demonstrating compliance with the dose standards contained in 40 CFR Part 190. For 2011, this dose was below the 25 mrem total body and organ limit (75 mrem thyroid) of 40 CFR Part 190.3.5 Doses From On-Site Disposal of Septic Waste, Cooling Tower Silt and Soil Off-Site Dose Calculation Manual, Appendices B, F, and I require that all applications of septage, cooling tower silt, and sand/soil within the approved designated disposal areas be limited to ensure the dose to a maximally exposed individual during the period of Vermont Yankee site control be maintained at less than 1 mrem/year to the whole body and any organ. After the period associated with Vermont Yankee operational control, the dose to the inadvertent intruder is to be maintained at less than 5 mrem/year.

The projected dose from on-site disposals of septic waste, cooling tower silt and sand/soil mixes is given in Appendix J of this report.The dose limits applicable to the on-site spreading of materials were met for the single spreading of septic waste in 2011, based on the combined dose from this spreading and all past spreadings.

3.6 On-Site Recreational Activities During 2011, no access for employees, their families and guests to the boat launching ramp located on-site just north of the intake structure was permitted.

As such, no recreational activities were permitted on-site during the report period and, therefore, no associated dose impact to members of the public.6 REFERENCES

1. Off-site Dose Calculation Manual (ODCM), Revision 34, Entergy Nuclear Vermont Yankee, LLC, dated 07/08/2011.

2. Regulatory Guide 1.109, "Calculation of Annual Doses to Man From Routine Release of Reactor Effluents for the Purpose of Evaluating Compliance with IOCFR Part 50, Appendix I", U. S. Nuclear Regulatory Commission, Office of Standards Development, Revision 1, October 1977.3. Regulatory Guide 1.111, "Methods for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine Releases from Light-Water-Cooled Reactors", U.S. Nuclear Regulatory Commission, Office of Standards Development, March 1976.4. Meteorology and Atomic Energy, 1968, Section 5-3.2.2, "Cloud Depletion", pg. 204. U. S. Atomic Energy Commission, July 1968.5. Regulatory guide 1.21, "Measuring, Evaluating, and Reporting Radioactive Material in Liquid and Gaseous Effluents and Solid Waste," U.S. Nuclear Regulatory Commission, Office of Nuclear Regulatory Research, Revision 2, June 2009.7 TABLE 1A Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Gaseous Effluents

-Summation of All Releases Unit Quarter Quarter Est. Total I 1 [1 2 Error, %A. Fission and Activation Gases I. Total release Ci ND ND 2. Average release rate for period gCi/sec ND ND 3. Percent of ODCM limit (1) % ND ND B. Iodines 1. Total Iodine Ci ND 4.80E-06 +/-1.80E+01 2. Average release rate for period pCi/sec ND 6.04E-07 3. Percent of ODCM limit (2) % 8.27E-04 1.02E-02 C. Particulates

1. Particulates with T-1/2>8 days Ci ND ND 2. Average release rate for period jiCi/sec ND ND 3. Percent of ODCM limit (3) % (3) (3)4. Gross alpha radioactivity Ci ND ND D. Tritium (4)1. Total release Ci 1.30E-01 5.70E-01 +l.80E+01 2. Average release rate for period pCi/sec 1.63E-02 7.17E-02 3. Percent of ODCM limit (3) % (3) (3)E. Carbon- 14 1. Total release Ci 1.92E+00 1.93E+00 (6)2. Average release rate for period pCi/sec 2.47E-01 2.45E-0l 3. Percent of ODCM limit (5) % 7.46E+00 7.50E+00 ND = Not Detected (1) ODCM Control 3.3.2. for the most limiting of beta air or gamma air dose. Percentage of ODCM limit calculated using Method I dose results.(2) ODCM Control 3.3.3. for dose from 1-131, 1-133, Tritium, and radionuclides in particulate form. Percentage of ODCM limit calculated using Method I dose results.(3) Per ODCM Control 3.3.3, dose contribution from Tritium and particulates are included with Iodine above in Part B.(4) Tritium released through evaporation from the onsite frac tank is included in these totals.(5) ODCM Control 3.3.3. for dose from 1-131, 1-133, Tritium, and radionuclides in particulate form. Percentage of ODCM limit calculated using Method II dose results, for Carbon-14 only.(6) The total Carbon-14 release is calculated, based on EPRI Technical Report 1021106, "Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents." The "Estimated Total Error" is therefore not applicable.

8 TABLE IA (Continued)

Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Gaseous Effluents -Summation of All Releases Quarter Quarter Est. Total UnitT_3 41 Error, %A. Fission and Activation Gases 1. Total release Ci ND ND 2. Average release rate for period gtCi/sec ND ND 3. Percent of ODCM limit (1) % ND ND B. Iodines 1. Total Iodine Ci ND ND 2, Average release rate for period pCi/sec ND ND 3. Percent of ODCM limit (2) % 4.82E-03 1.41E-03 C. Particulates

1. Particulates with T-I/2>8 days Ci ND 1.04E-05 +/-1.80E+01 2. Average release rate for period ItCi/sec ND 1.31E-06 3. Percent of ODCM limit (3) % (3) (3)4. Gross alpha radioactivity Ci ND ND D. Tritium (4)1. Total release Ci 7.55E-01 2.19E-01 +/-1.80E+01 2. Average release rate for period ý.Ci/sec 9.50E-02 2.75E-02 3. Percent of ODCM limit (3) % (3) (3)E. Carbon- 14 I. Total release Ci 1.87E+00 1.37E+00 (6)2. Average release rate for period gCi/sec 2.35E-01 1.72E-01 3. Percent of ODCM limit (5) % 7.27E+00 5.32E+00 ND = Not Detected (1) ODCM Control 3.3.2. for the most limiting of beta air or gamma air dose. Percentage of ODCM limit calculated using Method I dose results.(2) ODCM Control 3.3.3. for dose from 1-131, 1-133, Tritium, and radionuclides in particulate form. Percentage of ODCM limit calculated using Method I dose results.(3) Per ODCM Control 3.3.3, dose contribution from Tritium and particulates are included with Iodine above in Part B.(4) Tritium released through evaporation from the onsite frac tank is included in these totals.(5) ODCM Control 3.3.3. for dose from 1-131, 1-133, Tritium, and radionuclides in particulate form. Percentage of ODCM limit calculated using Method II dose results, for Carbon-14 only.(6) The total Carbon-14 release is calculated, based on EPRI Technical Report 1021106, "Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents." The "Estimated Total Error" is therefore not applicable.

9 TABLE IB Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Gaseous Effluents -Elevated Releases Continuous Mode Batch Mode Quarter Quarter Nuclides Released Units 1 2 1. Fission Gases Argon-41 Ci ND ND Krypton-85 Ci ND ND Krypton-g5m Ci ND ND Krypton-87 Ci ND ND Krypton-88 Ci ND ND Xenon-133 Ci ND ND Xenon-133m Ci ND ND Xenon-135 Ci ND ND Xenon-135m Ci ND ND Xenon- 138 Ci ND ND Unidentified Ci ND ND Total for Period Ci ND ND (1) (1)2. lodines Iodine-131 Ci ND 4.80E-06 Iodine-133 Ci ND ND Iodine-135 Ci ND ND Total for Period Ci ND 4.80E-06 (1) (1)3. Particulates Strontium-89 Ci ND ND Strontium-90 Ci ND ND Cesium-134 Ci ND ND Cesium-137 Ci ND ND Barium-Lanthanum-140 Ci ND ND Manganese-54 Ci ND ND Chromium-51 Ci ND ND Cobalt-57 Ci ND ND Cobalt-60 Ci ND ND Cerium- 141 Ci ND ND Zinc-65 Ci ND ND Total for Period Ci ND ND (1) (1)ND Not Detected at the plant stack (1) There were no batch mode gaseous releases for this reporting period.10 TABLE IB (Continued)

Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Gaseous Effluents -Elevated Releases Continuous Mode Batch Mode Qu arter Quarter Nuclides Released Units 3 4 3 4 1. Fission Gases Krypton-85 Ci ND ND Krypton-85m Ci ND ND Krypton-87 Ci ND ND Krypton-88 Ci ND ND Xenon- 133 Ci ND ND Xenon-133m Ci ND ND Xenon-135 Ci ND ND Xenon-135m Ci ND ND Xenon- 138 Ci ND ND Unidentified Ci ND ND Total for Period Ci ND ND (1) (1)2. lodines Iodine- 131 Ci ND ND Iodine-133 Ci ND ND Iodine-135 Ci ND ND Total for Period Ci ND ND (1) (1)3. Particulates Strontium-89 Ci ND ND Strontium-90 Ci ND ND Cesium- 134 Ci ND ND Cesium-137 Ci ND ND Barium-Lanthanum-140 Ci ND ND Manganese-54 Ci ND ND Chromium-51 Ci ND ND Cobalt-58 Ci ND ND Cobalt-60 Ci ND 1.04E-05 Cerium- 141 Ci ND ND Cerium- 144 Ci N D ND Zinc-65 Ci ND ND Total for Period Ci ND 1.04E-05 (1) (1)ND Not Detected at the Plant Stack (1) There were no batch mode gaseous releases for this reporting period.11 TABLE IC Entergy Nuclear Vermont Yankee Effluent and Waste Disnosal Annual Renort for 2011 Gaseous Effluents

-Ground Level Releases (2)Continuous Mode Batch Mode Quarter Quarter Nuclides Released Units 1 2 1 2 1. Fission Gases Krypton-85 Ci Krypton-85m Ci Krypton-87 Ci Krypton-88 Ci Xenon-133 Ci Xenon- 135 Ci Xenon-135m Ci Xenon- 138 Ci Unidentified Ci Total for Period Ci (1) (1) (1)1 2. lodines Iodine- 131 Ci Iodine-133 Ci Iodine-I 35 Ci Total for Period Ci (1) (1) (l 1 3. Particulates Strontium-89 Ci Strontium-90 Ci Cesium- 134 Ci Cesium- 137 Ci Barium-Lanthanum-140 Ci Manganese-54 Ci Chromium-51 Ci Cobalt-58 Ci Cobalt-60 Ci Cerium-141 Ci Zinc-65 Ci Iron-55 Cl Total for Period Ci (1)(1)(1) There were no ground level gaseous releases for this reporting period.(2) No radioactively contaminated used oil was burned during 2011.12 TABLE IC (Continued)

Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Gaseous Effluents

-Ground Level Releases(2)Continuous Mode Batch Mode Quarter Quarter Nuclides Released Units 3 4 3 4 1. Fission Gases Krypton-85 Ci Krypton-85m Ci Krypton-87 Ci Krypton-88 Ci Xenon- 133 Ci Xenon-135 Ci Xenon-135m Ci Xenon-138 Ci Unidentified Ci Total for Period Ci (1) (I) (1) (I)2. lodines Iodine-131 Ci Iodine-133 Ci Iodine-135 Ci Total for Period Ci (1) (1) (1) (1)3. Particulates Strontium-89 Ci Strontium-90 Ci Cesium- 134 Ci Cesium-137 Ci Barium-Lanthanum-140 Ci Manganese-54 Ci Chromium-51 Ci Cobalt-58 Ci Cobalt-60 Ci Cerium-141 Ci Zinc-65 Ci Iron-55 CI Total for Period Ci (1) (1) (1) (1)(1) There were no ground level gaseous releases for this reporting period.(2) No radioactively contaminated used oil was burned during 2011.13 TABLE ID Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Gaseous Effluents -Nonroutine Releases There were no non-routine or accidental gaseous releases during this reporting period.14 TABLE 2A Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Liquid Effluents

-Summation of All Releases Est. Total Units Quarter 1 Quarter 2 Error, %A. Fission and Activation Products 1. Total Release (not including tritium, gases, alpha) Ci ND ND 2. Average Diluted Concentration During Period g+/-Ci/mI ND ND 3. Percent of Applicable Limit (1) % ND ND B. Tritium 1. Total Release Ci 2.17E+00 5.63E-01 +2.00E+oi 2. Average Diluted Concentration During Period jCi/ml 1.73E-04 9.04E-05 3. Percent of Applicable Limit (1) % 1.01E-02 2.61E-03 C. Dissolved and Entrained Gases 1. Total Release Ci ND ND 2. Average Diluted Concentration During Period .ACi/ml ND ND 3. Percent of Applicable Limit % ND ND D. Gross Alpha Radioactivity

1. Total Release Ci ND ND E. Volume of Waste Release (prior to dilution)

Liters (2) I (2)F. Volume of Dilution Water Used During Period Liters 3.89E+06 I 3.89E+06 (3)ND Not detected in liquid effluents.

(1) The percent of limit is based on the ODCM Control 3.2.2 limiting dose (1.5 mrem/quarter) from liquid effluents and is related to the abnormal leakage of tritiated plant water into the underground environment.

The percent of the concentration limits specified in Appendix B to 1OCFR20.1001

-20.2402, Table 2, Column 2 (ODCM Control 3. 2.1) were estimated to be 17.3%, 9.0%, 1.4%, and 0.8% for the first, second, third, and fourth quarters, respectively.

(2) Leakage of contaminated plant water to subsurface areas was stopped in February 2010. The release of contaminated ground water to the Connecticut River is based on site boundary monitoring well data collected during 2011.(3) Dilution due to groundwater flow through the affected subsurface plume area toward the Connecticut River was estimated to be 7.83 gpm (or 3.89E+06 liters per quarter) during 2011. An Estimated Total Error is not applicable.

15 TABLE 2A (Continued)

Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Liquid Effluents

-Summation of All Releases Est. Total Units Quarter 3 Quarter 4 Error, %A. Fission and Activation Products 1. Total Release (not including tritium, gases, alpha) Ci ND ND 2. Average Diluted Concentration During Period PiCi/ml ND ND 3. Percent of Applicable Limit (1) % ND ND B. Tritium 1. Total Release Ci 5.48E-02 3.44E-02 +2.00E+01 2. Average Diluted Concentration During Period pCi/ml 1.43E-05 8.45E-06 3. Percent of Applicable Limit (1) % 2.54E-04 1.59E-04 C. Dissolved and Entrained Gases 1. Total Release Ci ND ND 2. Average Diluted Concentration During Period pCi/ml ND ND 3. Percent of Applicable Limit % ND ND D. Gross Alpha Radioactivity

1. Total Release Ci ND ND E. Volume of Waste Release (prior to dilution)

Liters (2) (2)F. Volume of Dilution Water Used During Period Liters 3.89E+06 3.89E+06 3 ND Not detected in liquid effluents.

(1) The percent of limit is based on the ODCM Control 3.2.2 limiting dose (1.5 mrem/quarter) from liquid effluents and is related to the abnormal leakage of tritiated plant water into the underground environment.

The percent of the concentration limits specified in Appendix B to 10CFR20.1001

-20.2402, Table 2, Column 2 (ODCM Control 3. 2.1)were estimated to be 17.3%, 9.0%, 1.4%, and 0.8% for the first, second, third, and fourth quarters, respectively.

(2) Leakage of contaminated plant water to subsurface areas was stopped in February 2010. The release of contaminated ground water to the Connecticut River is based on site boundary monitoring well data collected during 2011.(3) Dilution due to groundwater flow through the affected subsurface plume area toward the Connecticut River was estimated to be 7.83 gpm (or 3.89E+06 liters per quarter) during 2011. An Estimated Total Error is not applicable.

16 TABLE 2B Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report for 2011 Liauid Effluents

-Routine Releases Continuous Mode Batch Mode Nuclides Released Units Quarter 1 Quarter 2 Quarter 1 Quarter 2 Strontium-89 Ci ----Strontium-90 Ci ----Cesium-1 34 Ci ----Cesium-137 Ci ----Iodine-131 Ci --Cobalt-58 Ci --Cobalt-60 Ci --Iron-59 Ci ---Zinc-65 Ci ---Manganese-54 Ci ---Zirconium-Niobium-95 Ci --Molybdenum-99 Ci ----Technetium-99 Ci ----Barium-Lanthanum-140 Ci ----Cerium-141 Other (specify)

Ci ----Ci ---Ci ---Unidentified Ci ---Total for Period (above) Ci -I I Xe-1I c I I Xe-1 35 Ci ND Not detected in liquid effluents.

-Dash indicates no release of this type.17 TABLE 2B (Continued)

Entergy Nuclear Vermont Yankee Effluent and Waste Disnosal Annual Renort for 2011 Liquid Effluents(a)

-Routine Releases Continuous Mode Batch Mode Nuclides Released Units Quarter 3 Quarter 4 Quarter3 3 Quarter4 Strontium-89 Ci -- -Strontium-90 Ci -- -Cesium-134 Ci --Cesium-1 37 Ci -- -Iodine-131 Ci -- -Cobalt-58 Ci --Cobalt-60 Ci --Iron-59 Ci -- -Zinc-65 Ci -- -Manganese-54 Ci -- -Zirconium-Niobium-95 Ci ---Molybdenum-99 Ci ---Technetium-99 Ci ---Barium-Lanthanum-140 Ci --Cerium-141 Other (specify)

Ci ---Ci ---Ci ---Unidentified Ci --Total for Period (above) Ci ----Xe-133 Ci Xe-1 35 Ci -ND Not detected in liquid effluents.

-Dash indicates no release of this type.18 Table 3 Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report First and Second Quarters for 2011 Solid Waste and Irradiated Fuel Shipments A. Solid Waste Shipped Off-Site for Burial or Disposal (not Irradiated fuel)Shipped from VY for Burial Unit 1st & 2nd Quarters Est. Total Error %a. Spent resins, filter sludges, etc. m3 None N/A CI None N/A b. Dry Compressible waste, equipment, etc. m3 None N/A C3 None N/A c. Irradiated components, control rods, etc. m3 None N/A o None N/A Shipped from Processor(s) for Burial Unit 1st & 2nd Quarters Est. Total Error %a. Spent resins, filter sludges, etc. m3 1.06E+01 +/-25%Cl 3.73E+01 +/-25%b. Dry Compressible waste, equipment, etc. m3 6.64E+01 125%a3 1.SSE+00 +/-25%c. Irradiated components, control rods, etc. m3 O.OOE+OO t25%_____________

0.00E+o0 +/-:25%2. Estimate of Major Nudide Composition (By Type of Waste)a. Spent resins filter sludges b. Dry Compressabie waste, equip, etc. c. irradiated components, control rods, etc.Nuclide Percent (1) Nucilde Percent (1) Nudide Percent (1)Carbon-14 1.18% Chromium 51 6.62% None N/A Manganese-54 4.64% Manganese-S4 2.16%Iron-5S 26.42% Iron-SS 46.35%Cobalt 58 0.51% Iron 59 0.57%Cobalt-60 28.21% Cobalt 58 0.67%Nickel-63 4.53% Cobalt-60 29.18%Zinc-65 24.23% Nickel-63 0.62%Strontium-89 0.43% Zinc.6S 13.37%Cesium 137 13.56% Zirconium 9S 0.12%Tritium 100% Niobium 95 0.24%Silver 110m 0.10%Antimony 124 0.10%Cesium 137 28.35%(1) Includes only those nudides that are greater than 0.1% of the total activity 3. Disposition of Solid Waste Shipments (1st & 2nd Quarters)No. of Shipments From VY From Processor Mode To Processor To Burial 11 X Truck ES-GR / ES BCO, TN 9 X Truck ES Clive B. Irradiated Fuel Shipments (Dlsposition):

None C. Additional Data (1st & 2nd Quarters)VY to Supplemental information Processor VY to Burial Processors to Burial alass of Solid Waste Shipped AU none AU Type of Containers Used GDC ,Type A none GDC, Type A Solidification Agent or Absorbent Used none none none..f LI GR = Gallaher Road BCO = Bear Creek Operations F/S = Energy Solutions Completed By: Reviewed By: 19 Table 3 Entergy Nuclear Vermont Yankee Effluent and Waste Disposal Annual Report Third and Fourth Quarters for 2alI Solid Waste and Irradiated Fuel Shipments A. Solid Waste Shipped Off-Site for Burial or Disposal (not Irradiated fuel)1. Type of Waste Shipped from VY for Burial Unit 3rd & 4th Quarters Est. Total Error %a. Spent resins, filter sludges, etc. m3 None N/A 0 None N/A b. Dry Compressible waste, equipment, etc. m3 None N/A Cl None N/A c. Irradiated components, control rods, etc. m3 None N/A (l None N/A Shipped from Processoris) for Burial Unit 3rd & 4th Quarters Est. Total Error %a. Spent resins, filter sludges, etc. m3 4.55E+01 t25%CI 4.11E+01 t25%b. Dry Compressible waste, equipment, etc. m3 2.19E+O1 +25%Cl 4.17E+00 +/-25%c. Irradiated components, control rods, etc. m3 0.00E+O0 +/-25%CI 0.00E+O0 +/-25%2. Estimate of Major Nuclide Composition (By Type of Waste)a. Spent resins filter sludges b. Dry Compressable waste, equip, etc. c. Irradiated components, control rods, etc.Nuclide Percent (1) Nudide Percent (1) Nuclide Percent (1), iChromium 51 2.47% Chromium 51 7.63% None N/A Manganese-54 4.56% Manganese-54 2.18%Iron-55 22.33% Iron-SS 46.24%Cobalt 58 0.79% Iron 59 0.62%Cobalt-60 22.62% Cobalt 58 0.71%Nickel-63 5.49% Cobalt-60 26.02%Zlnc-65 27.29% Nickel-63 0.61%Strontium-g0 0.18% Zlnc-6S 15.95%Cesium 137 16.06% Zirconium 95 0.13%Niobium 95 0.26%Sliver 110m 0.10%Antimony 124 0.10%(1) includes only those nuclides that are greater than 0.1% of the total activity 3. Disposition of Solid Waste Shipments (1st & 2nd Quarters)No. of Shipments From VY From Processor J Mode To Processor

[ To Burial 7 X Truck ES-GR/ES BCO, TN 11 X Truck ES Clive B. Irradiated Fuel Shipments (Disposition):

None C. Additional Data (1st & 2nd Quarters)VY to 1 Supplemental Information Processor VY to Burial Processors to Burial Cass of Solid Waste Shipped AU none AU Type of Containers Used GDC,Type none GOC, Type A Solidification Agent or Absorbent Used none j none none GR = Gallaher Road BCO = Bear Creek Operations E/S = Energy Solutions Completed By: Reviewed By: Iz L.'g/3/ri..20 TABLE 4A Entergy Nuclear Vermont Yankee Maximum* Off-Site Doses/Dose Commitments to Members of the Public from Liquid and Gaseous Effluents for 2011 (1OCFR50, Appendix I)Dose (mrem)(a)Source 1st 2nd 3rd 4th Yea(b)Source Quarter IQuarter IQuarter IQuarter Yer)Liquid Effluents Total Body Dose 1.51E-04 3.92E-05 3.81E-06 2.39E-06 1.96E-04 Footnotes (c) (c) (c) (c) (c)Organ Dose 1.51E-04 3.92E-05 3.81E-06 2.39E-06 1.96E-04 Footnotes (c) (c) (c) (c) (c)Airborne Effluents lodines, H-3, C-14, 2.50E-01 2.50E-01 2.51E-01 2.50E-01 1.00E+00 and Particulates Footnotes (f) (f) (f) (f)Noble Gases Beta Air (mrad) ..........

Footnotes (d) (d) (d) (d) (d)Gamma Air (mrad) ..........

Footnotes (d) (d) (d) (d) (d)Direct Radiation 4.29 4.37 4.73 3.53 16.92 (e)"Maximum" means the largest fraction of the corresponding 1 OCFR50, Appendix I dose design objective.(a) The numbered footnotes indicate the age group, organ, and location of the dose receptor, where appropriate.(b) The yearly dose is the sum of the doses for each quarter, or a full annual assessment.(c) The critical age group/organ for the Maximum Exposed Individual (MEI) is the Adult/Total Body.(d) There were no noble gas releases in this quarter.(e) Maximum direct dose point located on the old west site boundary, approximately 208 meters from the Turbine Building (per ODCM, Rev. 34, Sect. 6.11.1).(f) The critical age group/organ for the MEI is the Child/Bone, at a location WNW, 2400 meters from the stack.21 TABLE 4B Entergy Nuclear Vermont Yankee Maximum Annual Dose Commitments from Direct External Radiation, Plus Liquid and Gaseous Effluents for 2011(*)(40CFR190)

Pathway Total Body 1 Maximum Organ Thyroid Pathway _ (mrem) (mrem) (mrem)Direct External (a) (b) 16.92 16.92 16.92 Liquids (c) 1.96E-04 1.96E-04 1.96E-04 Gases (c) 2.00E-01 1.00E+00 2.OOE-.01 Annual Total (d) 17.12 17.92 17.12 (*) The location of the projected maximum individual doses from combined direct radiation plus liquid and gaseous effluents correspond to residences at the southwest boundary relative to the Turbine Hall.(a) No occupancy time fraction (assumed 100%) or residential shielding credit is assumed which would reduce real doses below the calculated values. Expected direct external radiation doses would be reduced by about 54% with a realistic residential shielding credit and occupancy time (0.7 shielding factor from Regulatory Guide 1.109 and annual occupancy time 6760 hours0.0782 days 1.878 hours 0.0112 weeks 0.00257 months ).(b) The direct dose reported here was calculated using the current ODCM methodology and represents the dose to the former nearest residence, which was located in the S sector at 385 meters from the stack prior to the vacancy of this residence in 2008 and the purchase of land by Vermont Yankee.(c) Maximum dose to any organ over all age groups for each release.(d) Annual dose limits contained in the EPA Radiation Protection Standards (40CFR190) equal 25 mrem to the total body and any organ, except 75 mrem to the thyroid of a real member of the public.22 TABLE 4C Receptor Locations Entergy Nuclear Vermont Yankee t1) Nearest Milk Sector Site Boundary (I Nearest Resident 2 Animal2) Within (Meters) (Meters) 10 k Wn (Meters)N 400 1400 --NNE 350 1384 5520 (cows)NE 350 1255 --ENE 400 966 --E 500 933 --ESE 700 1915 --SE 750 1963 3600 (cows)SSE 850 2044 S 385 644 2220 (cows)SSW 300 451 --SW 250 418 8200 (cows)WSW 250 451 9730 (cows)W 300 628 820 (cows)WNW 400 1062 --NW 550 2253 --NNW 550 1738 --(1) Vermont Yankee UFSAR Figure 2.2-5.(2) The location(s) given are based on information from the Vermont Yankee 2011 Land Use Census and are relative to the plant stack. Gardens are assumed to be present at all resident locations.

23 TABLE 4D Usage Factors for Environmental Pathways Entergy Nuclear Vermont Yankee Age Fish Water Veg. Leafy Veg. Milk Meat Inhalation Group (kg/yr) (l/yr) (kg/yr) (kg/yr) (l/yr) (kg/yr) (m 3/yr)Adult 21 730 520 64 310 110 8,000 Teen 16 510 630 42 400 65 8,000 Child 6.9 510 520 26 330 41 3,700 Infant 0 330 0 0 330 0 1,400* Regulatory Guide 1.109, Table E-5 (Reference 2).24 TABLE 4E Environmental Parameters for Gaseous Effluents

Entergy Nuclear Vermont Yankee Vegetables Cow Milk Goat Milk Meat Variable Stored Leafy Pasture Stored Pasture J Stored ] Pasture Stored YV Agricultural Productivity 2 2 0.70 2 0.70 2 0.70 2 (kg/m 2) I P Soil Surface Density (kg/m 2) 240 240 240 240 240 240 240 240 T Transport Time to User (hrs) 48 48 48 48 480 480 TB Soil Exposure Time(a)(hrs) 131,400 131,400 131,400 131,400 131,400 131,400 131,400 131,400 TE Crop Exposure Time to Plume 1,440 1,440 720 1,440 720 1,440 720 1,440 (hrs)TH Holdup After Harvest (hrs) 1,440 24 0 2,160 0 2,160 0 2,160 QF Animals Daily Feed (kg/day) 50 50 6 6 50 50 FP Fraction of Year on Pasture (b) (b) (b)FS Fraction Pasture Feed When on 1 1 1 Pasture(c)

Note: Footnotes on following page.25 TABLE 4E (Continued)

Environmental Parameters for Gaseous Effluents Entergy Nuclear Vermont Yankee Vegetables Cow Milk Goat Milk Meat Variable Stored Leafy Pasture Stored Pasture Stored Pasture ] Stored FG Fraction of Stored Vegetables 0.76 Grown in Garden FL Fraction of Leafy Vegetables 1.0 Grown in Garden Fl Fraction Elemental Iodine = 0.5 H Absolute Humidity = 5.6-()* From VY ODCM, Table 6.9.1 (Reference 1).(a) For Method II dose/dose rate analyses of identified radioactivity releases of less than one year, the soil exposure time for that release may be set at 8,760 hours0.0088 days 0.211 hours 0.00126 weeks 2.8918e-4 months (one year) for all pathways.(b) For Method II dose/dose rate analyses performed for releases occurring during the first or fourth calendar quarters, the fraction of time animals are assumed to be on pasture is zero (non-growing season). For the second and third calendar quarters, the fraction of time on pasture (FP) will be set at 1.0. FP may also be adjusted for specific farm locations if this information is so identified and reported as part of the land use census.(c) For Method II analyses, the fraction of pasture feed while on pasture may be set to less than 1.0 for specific farm locations if this information is so identified and reported as part of the land use census.(d) For all Method II analyses, an absolute humidity value equal to 5.6 (gm/rn 3) shall be used to reflect conditions in the Northeast (

Reference:

Health Physics Journal, Volume 39 (August), 1980; Pages 318-320, Pergammon Press).26 TABLE 4F Environmental Parameters for Liquid Releases (Tritium)

Via Groundwater Entergy Nuclear Vermont Yankee Variable Potable Water Aquatic Food Stored Veg. Leafy Veg. Meat Cow Milk Name (Units)Mixing Ratio 1.58E-06 4.04E-04 1.44E-06 1.44E-06 1.44E-06 1.44E-06 Transit Time (hrs)* 12 24 0 0 0 0 Water Uptake** 50.0 60.0 (animal) (L/day)Feed Uptake** 50.0 50.0 (animal) (kg/day) I I* Values are from Regulatory Guide 1.109, Table E- 15 (Reference 2)** Values are from Regulatory Guide 1.109, Table E-3 (Reference 2)27 TABLE 5A VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT)

= .52 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 (1) 4.55 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 4.55 (2) .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 C-3 1 2 2 0 0 2 0 0 0 0 0 0 0 0 0 0 0 7 (1) 2.27 4.55 4.55 .00 .00 4.55 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 15.91 (2) .01 .02 .02 .00 .00 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .08 4-7 0 0 1 0 3 4 1 3 0 0 0 0 0 0 1 4 0 17 (1) .00 .00 2.27 .00 6.82 9.09 2.27 6.82 .00 .00 .00 .00 .00 .00 2.27 9.09 .00 38.64 (2) .00 .00 .01 .00 .04 .05 .01 .04 .00 .00 .00 .00 .00 .00 .01 .05 .00 .20 8-12 0 0 0 0 1 4 0 8 3 0 0 0 0 0 0 1 0 17 (1) .00 .00 .00 .00 2.27 9.09 .00 18.18 6.82 .00 .00 .00 .00 .00 .00 2.27 .00 38.64 (2) .00 .00 .00 .00 .01 .05 .00 .10 .04 .00 .00 .00 .00 .00 .00 .01 .00 .20 13-18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 2.27 .00 2.27 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .01 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 3 2 3 0 4 10 1 11 3 0 0 0 0 0 1 6 0 44 (1) 6.82 4.55 6.82 .00 9.09 22.73 2.27 25.00 6.82 .00 .00 .00 .00 .00 2.27 13.64 .00 100.00 (2) .04 .02 .04 .00 .05 .12 .01 .13 .04 .00 .00 .00 .00 .00 .01 .07 .00 .52 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)28 TABLE 5B VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT)

= 1.09 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 1.10 .00 .00 .00 .00 1.10 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .00 .01 4-7 8 2 0 0 7 13 12 7 1 0 0 0 0 0 0 5 0 55 (1) 8.79 2.20 .00 .00 7.69 14.29 13.19 7.69 1.10 .00 .00 .00 .00 .00 .00 5.49 .00 60.44 (2) .10 .02 .00 .00 .08 .16 .14 .08 .01 .00 .00 .00 .00 .00 .00 .06 .00 .66 8-12 0 2 0 0 0 0 3 7 3 0 0 0 0 0 0 17 0 32 (1) .00 2.20 .00 .00 .00 .00 3.30 7.69 3.30 .00 .00 .00 .00 .00 .00 18.68 .00 35.16 (2) .00 .02 .00 .00 .00 .00 .04 .08 .04 .00 .00 .00 .00 .00 .00 .20 .00 .38 13-18 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 0 0 3 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 1.10 .00 2.20 .00 .00 3.30 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .02 .00 .00 .04 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 8 4 0 0 7 13 15 14 4 0 0 0 2 0 2 22 0 91 (1) 8.79 4.40 .00 .00 7.69 14.29 16.48 15.38 4.40 .00 .00 .00 2.20 .00 2.20 24.18 .00 100.00 (2) .10 .05 .00 .00 .08 .16 .18 .17 .05 .00 .00 .00 .02 .00 .02 .26 .00 1.09 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)29 TABLE 5C VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT)

= 2.72 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 2 0 1 1 1 3 3 0 1 0 0 0 0 1 0 2 0 15 (1) .88 .00 .44 .44 .44 1.32 1.32 .00 .44 .00 .00 .00 .00 .44 .00 .88 .00 6.58 (2) .02 .00 .01 .01 .01 .04 .04 .00 .01 .00 .00 .00 .00 .01 .00 .02 .00 .18 4-7 19 6 4 6 15 14 7 20 9 3 3 0 0 1 3 17 0 127 (1) 8.33 2.63 1.75 2.63 6.58 6.14 3.07 8.77 3.95 1.32 1.32 .00 .00 .44 1.32 7.46 .00 55.70 (2) .23 .07 .05 .07 .18 .17 .08 .24 .11 .04 .04 .00 .00 .01 .04 .20 .00 1.51 8-12 9 1 1 0 0 1 3 11 9 4 4 0 5 0 2 20 0 70 (1) 3.95 .44 .44 .00 .00 .44 1.32 4.82 3.95 1.75 1.75 .00 2.19 .00 .88 8.77 .00 30.70 (2) .11 .01 .01 .00 .00 .01 .04 .13 .11 .05 .05 .00 .06 .00 .02 .24 .00 .84 13-18 0 0 0 0 0 0 0 2 1 0 0 0 0 2 10 1 0 16 (1) .00 .00 .00 .00 .00 .00 .00 .88 .44 .00 .00 .00 .00 .88 4.39 .44 .00 7.02 (2) .00 .00 .00 .00 .00 .00 .00 .02 .01 .00 .00 .00 .00 .02 .12 .01 .00 .19 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 30 7 6 7 16 18 13 33 20 7 7 0 5 4 15 40 0 228 (1) 13.16 3.07 2.63 3.07 7.02 7.89 5.70 14.47 8.77 3.07 3.07 .00 2.19 1.75 6.58 17.54 .00 100.00 (2) .36 .08 .07 .08 .19 .21 .16 .39 .24 .08 .08 .00 .06 .05 .18 .48 .00 2.72 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)30 TABLE 5D VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT)

= 42.81 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .03 .00 .06 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .01 .00 .02 C-3 94 57 56 52 74 74 62 53 45 29 35 23 25 33 62 119 0 893 (1) 2.62 1.59 1.56 1.45 2.06 2.06 1.73 1.48 1.25 .81 .98 .64 .70 .92 1.73 3.32 .00 24.88 (2) 1.12 .68 .67 .62 .88 .88 .74 .63 .54 .35 .42 .27 .30 .39 .74 1.42 .00 10.65 4-7 133 40 20 17 54 98 159 277 116 21 16 25 58 52 177 334 0 1597 (1) 3.71 1.11 .56 .47 1.50 2.73 4.43 7.72 3.23 .59 .45 .70 1.62 1.45 4.93 9.31 .00 44.50 (2) 1.59 .48 .24 .20 .64 1.17 1.90 3.30 1.38 .25 .19 .30 .69 .62 2.11 3.98 .00 19.05 8-12 63 6 3 1 0 24 14 101 93 15 11 15 98 115 129 204 0 892 (1) 1.76 .17 .08 .03 .00 .67 .39 2.81 2.59 .42 .31 .42 2.73 3.20 3.59 5.68 .00 24.85 (2) .75 .07 .04 .01 .00 .29 .17 1.20 1.11 .18 .13 .18 1.17 1.37 1.54 2.43 .00 10.64 13-18 3 0 0 0 1 0 0 6 12 6 0 0 11 64 53 39 0 195 (1) .08 .00 .00 .00 .03 .00 .00 .17 .33 .17 .00 .00 .31 1.78 1.48 1.09 .00 5.43 (2) .04 .00 .00 .00 .01 .00 .00 .07 .14 .07 .00 .00 .13 .76 .63 .47 .00 2.33 19-24 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 4 0 10 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .06 .08 .11 .00 .28 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .02 .04 .05 .00 .12 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 293 103 79 70 129 196 235 437 266 71 62 63 193 266 425 701 0 3589 (1) 8.16 2.87 2.20 1.95 3.59 5.46 6.55 12.18 7.41 1.98 1.73 1.76 5.38 7.41 11.84 19.53 .00 100.00 (2) 3.50 1.23 .94 .84 1.54 2.34 2.80 5.21 3.17 .85 .74 .75 2.30 3.17 5.07 8.36 .00 42.81 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)31 TABLE 5E VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT)

= 35.05 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 1 0 0 2 1 1 1 0 1 1 1 0 1 2 1 0 0 13 (1) .03 .00 .00 .07 .03 .03 .03 .00 .03 .03 .03 .00 .03 .07 .03 .00 .00 .44 (2) .01 .00 .00 .02 .01 .01 .01 .00 .01 .01 .01 .00 .01 .02 .01 .00 .00 .16 C-3 52 34 21 29 25 51 53 94 118 97 200 186 183 184 205 176 0 1708 (1) 1.77 1.16 .71 .99 .85 1.74 1.80 3.20 4.02 3.30 6.81 6.33 6.23 6.26 6.98 5.99 .00 58.13 (2) .62 .41 .25 .35 .30 .61 .63 1.12 1.41 1.16 2.39 2.22 2.18 2.19 2.45 2.10 .00 20.37 4-7 27 5 3 1 9 23 58 97 79 40 26 39 87 65 158 187 0 904 (1) .92 .17 .10 .03 .31 .78 1.97 3.30 2.69 1.36 .88 1.33 2.96 2.21 5.38 6.36 .00 30.77 (2) .32 .06 .04 .01 .11 .27 .69 1.16 .94 .48 .31 .47 1.04 .78 1.88 2.23 .00 10.78 8-12 7 1 0 0 3 0 3 28 23 2 0 3 27 50 40 73 0 260 (1) .24 .03 .00 .00 .10 .00 .10 .95 .78 .07 .00 .10 .92 1.70 1.36 '2.48 .00 8.85 (2) .08 .01 .00 .00 .04 .00 .04 .33 .27 .02 .00 .04 .32 .60 .48 .87 .00 3.10 13-18 0 0 0 0 0 0 0 2 6 0 0 0 6 18 17 3 0 52 (1) .00 .00 .00 .00 .00 .00 .00 .07 .20 .00 .00 .00 .20 .61 .58 .10 .00 1.77 (2) .00 .00 .00 .00 .00 .00 .00 .02 .07 .00 .00 .00 .07 .21 .20 .04 .00 .62 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .00 .00 .03 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .01 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 87 40 24 32 38 75 115 221 227 140 227 228 304 319 422 439 0 2938 (1) 2.96 1.36 .82 1.09 1.29 2.55 3.91 7.52 7.73 4.77 7.73 7.76 10.35 10.86 14.36 14.94 .00 100.00 (2) 1.04 .48 .29 .38 .45 .89 1.37 2.64 2.71 1.67 2.71 2.72 3.63 3.81 5.03 5.24 .00 35.05 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)32 TABLE 5F VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT)

= 13.65 WIND DIRECTION FROM SPEED MPH N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL CALM 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .09 .09 .00 .00 .09 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .01 .00 .00 .01 C-3 12 9 3 4 8 5 22 31 71 107 247 223 146 63 84 34 (1) 1.05 .79 .26 .35 .70 .44 1.92 2.71 6.21 9.35 21.59 19.49 12.76 5.51 7.34 2.97 (2) .14 .11 .04 .05 .10 .06 .26 .37 .85 1.28 2.95 2.66 1.74 .75 1.00 .41 4-7 0 1 0 1 1 2 5 6 6 1 6 5 8 6 12 12 (1) .00 .09 .00 .09 .09 .17 .44 .52 .52 .09 .52 .44 .70 .52 1.05 1.05 (2) .00 .01 .00 .01 .01 .02 .06 .07 .07 .01 .07 .06 .10 .07 .14 .14 9-12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 13-18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 12 10 3 5 9 7 27 37 77 108 253 229 155 69 96 47 (1) 1.05 .87 .26 .44 .79 .61 2.36 3.23 6.73 9.44 22.12 20.02 13.55 6.03 8.39 4.11 (2) .14 .12 .04 .06 .11 .08 .32 .44 .92 1.29 3.02 2.73 1.85 .82 1.15 .56 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)0 3.00 .26.00 .04 0 1069.00 93.44.00 12.75 0 72.00 6.29.00 .86 0 0.00 .00.00 .00 0 0.00 .00.00 .00 0 0.00 .00.00 .00 0 0.00 .00.00 .00 0 1144.00 100.00.00 13.65 33 TABLE 5G VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT)

= 4.16 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 9 7 3 5 5 8 8 14 22 46 45 54 37 25 24 16 0 328 (1) 2.58 2.01 .86 1.43 1.43 2.29 2.29 4.01 6.30 13.18 12.89 15.47 10.60 7.16 6.88 4.58 .00 93.98 (2) .11 .08 .04 .06 .06 .10 .10 .17 .26 .55 .54 .64 .44 .30 .29 .19 .00 3.91 4-7 0 0 0 1 0 0 0 0 1 2 2 2 2 2 4 5 0 21 (1) .00 .00 .00 .29 .00 .00 .00 .00 .29 .57 .57 .57 .57 .57 1.15 1.43 .00 6.02 (2) .00 .00 .00 .01 .00 .00 .00 .00 .01 .02 .02 .02 .02 .02 .05 .06 .00 .25 8-12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 13-18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 9 7 3 6 5 8 8 14 23 48 47 56 39 27 28 21 0 349 (1) 2.58 2.01 .86 1.72 1.43 2.29 2.29 4.01 6.59 13.75 13.47 16.05 11.17 7.74 8.02 6.02 .00 100.00 (2) .11 .08 .04 .07 .06 .10 .10 .17 .27 .57 .56 .67 .47 .32 .33 .25 .00 4.16 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)34 TABLE 5H VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS ALL CLASS FREQUENCY (PERCENT)

= 100.00 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 3 0 0 2 1 1 1 0 1 1 1 1 2 2 2 2 0 20 (1) .04 .00 .00 .02 .01 .01 .01 .00 .01 .01 .01 .01 .02 .02 .02 .02 .00 .24 (2) .04 .00 .00 .02 .01 .01 .01 .00 .01 .01 .01 .01 .02 .02 .02 .02 .00 .24 C-3 170 109 86 91 113 143 148 192 257 279 527 486 392 306 375 347 0 4021 (1) 2.03 1.30 1.03 1.09 1.35 1.71 1.77 2.29 3.07 3.33 6.29 5.80 4.68 3.65 4.47 4.14 .00 47.97 (2) 2.03 1.30 1.03 1.09 1.35 1.71 1.77 2.29 3.07 3.33 6.29 5.80 4.68 3.65 4.47 4.14 .00 47.97 4-7 187 54 28 26 89 154 242 410 212 67 53 71 155 126 355 564 0 2793 (1) 2.23 .64 .33 .31 1.06 1.84 2.89 4.89 2.53 .80 .63 .85 1.85 1.50 4.23 6.73 .00 33.32 (2) 2.23 .64 .33 .31 1.06 1.84 2.89 4.89 2.53 .80 .63 .85 1.85 1.50 4.23 6.73 .00 33.32 8-12 79 10 4 1 4 29 23 155 131 21 15 18 130 165 171 315 0 1271 (1) .94 .12 .05 .01 .05 .35 .27 1.85 1.56 .25 .18 .21 1.55 1.97 2.04 3.76 .00 15.16 (2) .94 .12 .05 .01 .05 .35 .27 1.85 1.56 .25 .18 .21 1.55 1.97 2.04 3.76 .00 15.16 13-18 3 0 0 0 1 0 0 10 19 6 0 0 18 84 82 44 0 267 (1) .04 .00 .00 .00 .01 .00 .00 .12 .23 .07 .00 .00 .21 1.00 .98 .52 .00 3.19 (2) .04 .00 .00 .00 .01 .00 .00 .12 .23 .07 .00 .00 .21 1.00 .98 .52 .00 3.19 19-24 0 0 0 0 0 0 0 0 0 0 0 0 1 2 4 4 0 11 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .02 .05 .05 .00 .13 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .02 .05 .05 .00 .13 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 442 173 118 120 208 327 414 767 620 374 596 576 698 685 989 1276 0 8383 (1) 5.27 2.06 1.41 1.43 2.48 3.90 4.94 9.15 7.40 4.46 7.11 6.87 8.33 8.17 11.80 15.22 .00 100.00 (2) 5.27 2.06 1.41 1.43 2.48 3.90 4.94 9.15 7.40 4.46 7.11 6.87 8.33 8.17 11.80 15.22 .00 100.00 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)35 TABLE 6A VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT)

= .57 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 (1) 2.08 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 2.08 (2) .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 C-3 2 1 1 0 1 4 6 2 0 1 0 0 1 0 0 0 0 19 (1) 4.17 2.08 2.08 .00 2.08 8.33 12.50 4.17 .00 2.08 .00 .00 2.08 .00 .00 .00 .00 39.58 (2) .02 .01 .01 .00 .01 .05 .07 .02 .00 .01 .00 .00 .01 .00 .00 .00 .00 .23 4-7 1 1 0 0 0 3 2 1 0 0 0 0 0 0 0 2 0 10 (1) 2.08 2.08 .00 .00 .00 6.25 4.17 2.08 .00 .00 .00 .00 .00 .00 .00 4.17 .00 20.83 (2) .01 .01 .00 .00 .00 .04 .02 .01 .00 .00 .00 .00 .00 .00 .00 .02 .00 .12 8-12 3 0 0 0 0 2 0 1 2 0 0 0 0 0 0 3 0 11 (1) 6.25 .00 .00 .00 .00 4.17 .00 2.08 4.17 .00 .00 .00 .00 .00 .00 6.25 .00 22.92 (2) .04 .00 .00 .00 .00 .02 .00 .01 .02 .00 .00 .00 .00 .00 .00 .04 .00 .13 13-18 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 3 (1) .00 .00 .00 .00 .00 .00 .00 .00 6.25 .00 .00 .00 .00 .00 .00 .00 .00 6.25 (2) .00 .00 .00 .00 .00 .00 .00 .00 .04 .00 .00 .00 .00 .00 .00 .00 .00 .04 19-24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 4 (1) 2.08 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 6.25 .00 8.33 (2) .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .04 .00 .05 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 8 2 1 0 1 9 8 4 5 1 0 0 1 0 0 8 0 48 (1) 16.67 4.17 2.08 .00 2.08 18.75 16.67 8.33 10.42 2.08 .00 .00 2.08 .00 .00 16.67 .00 100.00 (2) .10 .02 .01 .00 .01 .11 .10 .05 .06 .01 .00 .00 .01 .00 .00 .10 .00 .57 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)36 TABLE 6B VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT)

= 1.30 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW Sw WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 0 0 1 0 2 2 3 0 0 1 0 0 0 0 0 0 0 9 (1) .00 .00 .92 .00 1.83 1.83 2.75 .00 .00 .92 .00 .00 .00 .00 .00 .00 .00 8.26 (2) .00 .00 .01 .00 .02 .02 .04 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .11 4-7 2 2 0 0 2 6 1 1 0 0 0 0 0 0 0 1 0 15 (1) 1.83 1.83 .00 .00 1.83 5.50 .92 .92 .00 .00 .00 .00 .00 .00 .00 .92 .00 13.76 (2) .02 .02 .00 .00 .02 .07 .01 .01 .00 .00 .00 .00 .00 .00 .00 .01 .00 .18 9-12 9 2 0 1 1 2 4 10 9 1 0 0 0 0 0 6 0 45 (1) 8.26 1.83 .00 .92 .92 1.83 3.67 9.17 8.26 .92 .00 .00 .00 .00 .00 5.50 .00 41.28 (2) .11 .02 .00 .01 .01 .02 .05 .12 .11 .01 .00 .00 .00 .00 .00 .07 .00 .54 13-18 6 5 0 0 0 0 0 1 2 0 0 0 0 0 0 7 0 21 (1) 5.50 4.59 .00 .00 .00 .00 .00 .92 1.83 .00 .00 .00 .00 .00 .00 6.42 .00 19.27 (2) .07 .06 .00 .00 .00 .00 .00 .01 .02 .00 .00 .00 .00 .00 .00 .08 .00 .25 19-24 4 0 0 0 0 0 0 0 0 0 0 0 0 1 4 8 0 17 (1) 3.67 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .92 3.67 7.34 .00 15.60 (2) .05 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .05 .10 .00 .20 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 2 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 1.83 .00 .00 .00 1.83 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 .00 .00 .00 .02 ALL SPEEDS 21 9 1 1 5 10 8 12 11 2 0 0 0 3 4 22 0 109 (1) 19.27 8.26 .92 .92 4.59 9.17 7.34 11.01 10.09 1.83 .00 .00 .00 2.75 3.67 20.18 .00 100.00 (2) .25 .11 .01 .01 .06 .12 .10 .14 .13 .02 .00 .00 .00 .04 .05 .26 .00 1.30 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)37 TABLE 6C VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT)

= 3.41 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 1 2 0 1 0 0 3 1 0 0 0 0 0 0 0 2 0 10 (1) .35 .70 .00 .35 .00 .00 1.05 .35 .00 .00 .00 .00 .00 .00 .00 .70 .00 3.50 (2) .01 .02 .00 .01 .00 .00 .04 .01 .00 .00 .00 .00 .00 .00 .00 .02 .00 .12 4-7 11 4 4 0 3 21 15 7 3 0 0 0 0 0 2 13 0 83 (1) 3.85 1.40 1.40 .00 1.05 7.34 5.24 2.45 1.05 .00 .00 .00 .00 .00 .70 4.55 .00 29.02 (2) .13 .05 .05 .00 .04 .25 .18 .08 .04 .00 .00 .00 .00 .00 .02 .16 .00 .99 8-12 20 6 2 1 0 4 8 12 19 5 2 0 2 1 1 14 0 97 (1) 6.99 2.10 .70 .35 .00 1.40 2.80 4.20 6.64 1.75 .70 .00 .70 .35 .35 4.90 .00 33.92 (2) .24 .07 .02 .01 .00 .05 .10 .14 .23 .06 .02 .00 .02 .01 .01 .17 .00 1.16 13-18 11 3 2 0 0 1 1 1 10 2 6 2 7 6 3 13 0 68 (1) 3.85 1.05 .70 .00 .00 .35 .35 .35 3.50 .70 2.10 .70 2.45 2.10 1.05 4.55 .00 23.78 (2) .13 .04 .02 .00 .00 .01 .01 .01 .12 .02 .07 .02 .08 .07 .04 .16 .00 .81 19-24 5 0 0 0 0 0 0 0 4 0 0 0 1 3 4 6 0 23 (1) 1.75 .00 .00 .00 .00 .00 .00 .00 1.40 .00 .00 .00 .35 1.05 1.40 2.10 .00 8.04 (2) .06 .00 .00 .00 .00 .00 .00 .00 .05 .00 .00 .00 .01 .04 .05 .07 .00 .27 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 1 0 5 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 1.05 .35 .35 .00 1.75 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .04 .01 .01 .00 .06 ALL SPEEDS 48 15 8 2 3 26 27 21 36 7 8 2 10 13 11 49 0 286 (1) 16.78 5.24 2.80 .70 1.05 9.09 9.44 7.34 12.59 2.45 2.80 .70 3.50 4.55 3.85 17.13 .00 100.00 (2) .57 .18 .10 .02 .04 .31 .32 .25 .43 .08 .10 .02 .12 .16 .13 .58 .00 3.41 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)38 TABLE 6D VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT)

= 46.99 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .00 .03 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .01 C-3 53 38 32 40 39 41 75 51 27 13 4 11 10 15 23 54 0 526 (1) 1.35 .96 .81 1.02 .99 1.04 1.90 1.29 .69 .33 .10 .28 .25 .38 .58 1.37 .00 13.35 (2) .63 .45 .38 .48 .47 .49 .89 .61 .32 .16 .05 .13 .12 .18 .27 .64 .00 6.27 4-7 104 48 37 38 33 72 127 140 104 13 10 9 19 25 30 189 0 998 (1) 2.64 1.22 .94 .96 .84 1.83 3.22 3.55 2.64 .33 .25 .23 .48 .63 .76 4.80 .00 25.34 (2) 1.24 .57 .44 .45 .39 .86 1.51 1.67 1.24 .16 .12 .11 .23 .30 .36 2.25 .00 11.91 8-12 146 36 6 1 8 31 71 169 241 45 22 28 74 73 55 255 0 1261 (1) 3.71 .91 .15 .03 .20 .79 1.80 4.29 6.12 1.14 .56 .71 1.88 1.85 1.40 6.47 .00 32.01 (2) 1.74 .43 .07 .01 .10 .37 .85 2.02 2.87 .54 .26 .33 .88 .87 .66 3.04 .00 15.04 13-18 85 11 2 3 0 8 12 23 139 28 9 16 73 137 94 227 0 867 (1) 2.16 .28 .05 .08 .00 .20 .30 .58 3.53 .71 .23 .41 1.85 3.48 2.39 5.76 .00 22.01 (2) 1.01 .13 .02 .04 .00 .10 .14 .27 1.66 .33 .11 .19 .87 1.63 1.12 2.71 .00 10.34 19-24 20 2 0 0 0 2 3 1 17 6 2 1 7 46 34 94 0 235 (1) .51 .05 .00 .00 .00 .05 .08 .03 .43 .15 .05 .03 .18 1.17 .86 2.39 .00 5.97 (2) .24 .02 .00 .00 .00 .02 .04 .01 .20 .07 .02 .01 .08 .55 .41 1.12 .00 2.80 GT 24 4 0 0 0 0 0 0 0 0 0 0 0 2 4 6 35 0 51 (1) .10 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .05 .10 .15 .89 .00 1.29 (2) .05 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 .05 .07 .42 .00 .61 ALL SPEEDS 412 135 77 82 80 154 288 384 528 105 47 65 185 300 242 855 0 3939 (1) 10.46 3.43 1.95 2.08 2.03 3.91 7.31 9.75 13.40 2.67 1.19 1.65 4.70 7.62 6.14 21.71 .00 100.00 (2) 4.91 1.61 .92 .98 .95 1.84 3.44 4.58 6.30 1.25 .56 .78 2.21 3.58 2.89 10.20 .00 46.99 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)39 TABLE 6E VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT)

= 33.90 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 1 1 1 2 0 0 0 0 0 1 0 0 0 0 0 6 (1) .00 .00 .04 .04 .04 .07 .00 .00 .00 .00 .00 .04 .00 .00 .00 .00 .00 .21 (2) .00 .00 .01 .01 .01 .02 .00 .00 .00 .00 .00 .01 .00 .00 .00 .00 .00 .07 C-3 122 78 52 50 65 102 107 68 40 16 8 9 10 19 36 78 0 860 (1) 4.29 2.74 1.83 1.76 2.29 3.59 3.76 2.39 1.41 .56 .28 .32 .35 .67 1.27 2.74 .00 30.26 (2) 1.46 .93 .62 .60 .78 1.22 1.28 .81 .48 .19 .10 .11 .12 .23 .43 .93 .00 10.26 4-7 131 24 10 9 11 40 134 152 72 29 16 12 21 22 32 296 0 1011 (1) 4.61 .84 .35 .32 .39 1.41 4.71 5.35 2.53 1.02 .56 .42 .74 .77 1.13 10.42 .00 35.57 (2) 1.56 .29 .12 .11 .13 .48 1.60 1.81 .86 .35 .19 .14 .25 .26 .38 3.53 .00 12.06 8-12 79 11 1 1 4 5 26 63 75 35 28 20 48 38 30 206 0 670 (1) 2.78 .39 .04 .04 .14 .18 .91 2.22 2.64 1.23 .99 .70 1.69 1.34 1.06 7.25 .00 23.57 (2) .94 .13 .01 .01 .05 .06 .31 .75 .89 .42 .33 .24 .57 .45 .36 2.46 .00 7.99 13-18 10 1 1 0 2 4 4 6 42 11 5 1 16 33 8 94 0 238 (1) .35 .04 .04 .00 .07 .14 .14 .21 1.48 .39 .18 .04 .56 1.16 .28 3.31 .00 8.37 (2) .12 .01 .01 .00 .02 .05 .05 .07 .50 .13 .06 .01 .19 .39 .10 1.12 .00 2.84 19-24 8 0 1 1 0 0 0 0 15 0 0 0 2 4 2 19 0 52 (1) .28 .00 .04 .04 .00 .00 .00 .00 .53 .00 .00 .00 .07 .14 .07 .67 .00 1.83 (2) .10 .00 .01 .01 .00 .00 .00 .00 .18 .00 .00 .00 .02 .05 .02 .23 .00 .62 GT 24 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 3 0 5 (1) .00 .00 .00 .00 .00 .04 .00 .00 .04 .00 .00 .00 .00 .00 .00 .11 .00 .18 (2) .00 .00 .00 .00 .00 .01 .00 .00 .01 .00 .00 .00 .00 .00 .00 .04 .00 .06 ALL SPEEDS 350 114 66 62 83 154 271 289 245 91 57 43 97 116 108 696 0 2842 (1) 12.32 4.01 2.32 2.18 2.92 5.42 9.54 10.17 8.62 3.20 2.01 1.51 3.41 4.08 3.80 24.49 .00 100.00 (2) 4.18 1.36 .79 .74 .99 1.84 3.23 3.45 2.92 1.09 .68 .51 1.16 1.38 1.29 8.30 .00 33.90 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)40 TABLE 6F VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT)

= 11.74 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 1 1 0 0 2 0 0 0 0 0 0 1 1 0 0 6 (1) .00 .00 .10 .10 .00 .00 .20 .00 .00 .00 .00 .00 .00 .10 .10 .00 .00 .61 (2) .00 .00 .01 .01 .00 .00 .02 .00 .00 .00 .00 .00 .00 .01 .01 .00 .00 .07 C-3 41 31 33 21 30 35 48 32 22 14 7 7 8 13 16 34 0 392 (1) 4.17 3.15 3.35 2.13 3.05 3.56 4.88 3.25 2.24 1.42 .71 .71 .81 1.32 1.63 3.46 .00 39.84 (2) .49 .37 .39 .25 .36 .42 .57 .38 .26 .17 .08 .08 .10 .16 .19 .41 .00 4.68 4-7 43 7 3 5 11 21 64 71 32 12 9 15 15 14 20 97 0 439 (1) 4.37 .71 .30 .51 1.12 2.13 6.50 7.22 3.25 1.22 .91 1.52 1.52 1.42 2.03 9.86 .00 44.61 (2) .51 .08 .04 .06 .13 .25 .76 .85 .38 .14 .11 .18 .18 .17 .24 1.16 .00 5.24 9-12 15 1 1 0 1 1 21 12 9 6 8 4 7 7 10 38 0 141 (1) 1.52 .10 .10 .00 .10 .10 2.13 1.22 .91 .61 .81 .41 .71 .71 1.02 3.86 .00 14.33 (2) .18 .01 .01 .00 .01 .01 .25 .14 .11 .07 .10 .05 .08 .08 .12 .45 .00 1.68 13-18 0 0 0 0 0 0 0 0 3 0 0 0 0 1 1 1 0 6 (1) .00 .00 .00 .00 .00 .00 .00 .00 .30 .00 .00 .00 .00 .10 .10 .10 .00 .61 (2) .00 .00 .00 .00 .00 .00 .00 .00 .04 .00 .00 .00 .00 .01 .01 .01 .00 .07 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 99 39 38 27 42 57 135 115 66 32 24 26 30 36 48 170 0 984 (1) 10.06 3.96 3.86 2.74 4.27 5.79 13.72 11.69 6.71 3.25 2.44 2.64 3.05 3.66 4.88 17.28 .00 100.00 (2) 1.18 .47 .45 .32 .50 .68 1.61 1.37 .79 .38 .29 .31 .36 .43 .57 2.03 .00 11.74 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)41 TABLE 6G VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT)

= 2.09 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 3 1 0 3 2 6 8 8 2 0 2 1 1 4 2 1 0 44 (1) 1.71 .57 .00 1.71 1.14 3.43 4.57 4.57 1.14 .00 1.14 .57 .57 2.29 1.14 .57 .00 25.14 (2) .04 .01 .00 .04 .02 .07 .10 .10 .02 .00 .02 .01 .01 .05 .02 .01 .00 .52 4-7 3 0 0 1 2 8 13 20 13 2 3 2 4 2 4 6 0 83 (1) 1.71 .00 .00 .57 1.14 4.57 7.43 11.43 7.43 1.14 1.71 1.14 2.29 1.14 2.29 3.43 .00 47.43 (2) .04 .00 .00 .01 .02 .10 .16 .24 .16 .02 .04 .02 .05 .02 .05 .07 .00 .99 8-12 0 0 0 0 0 0 6 10 4 2 2 3 5 7 0 7 0 46 (1) .00 .00 .00 .00 .00 .00 3.43 5.71 2.29 1.14 1.14 1.71 2.86 4.00 .00 4.00 .00 26.29 (2) .00 .00 .00 .00 .00 .00 .07 .12 .05 .02 .02 .04 .06 .08 .00 .08 .00 .55 13-18 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 2 (1) .00 .00 .00 .00 .00 .00 .00 .00 .57 .00 .00 .00 .00 .57 .00 .00 .00 1.14 (2) .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .00 .01 .00 .00 .00 .02 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 6 1 0 4 4 14 27 38 20 4 7 6 10 14 6 14 0 175 (1) 3.43 .57 .00 2.29 2.29 8.00 15.43 21.71 11.43 2.29 4.00 3.43 5.71 8.00 3.43 8.00 .00 100.00 (2) .07 .01 .00 .05 .05 .17 .32 .45 .24 .05 .08 .07 .12 .17 .07 .17 .00 2.09 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)42 TABLE 6H VERMONT YANKEE JAN 11 -DEC 11 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 297.0 FT WIND DATA STABILITY CLASS ALL CLASS FREQUENCY (PERCENT)

= 100.00 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 1 0 2 2 1 2 2 0 0 0 0 1 0 1 1 1 0 14 (1) .01 .00 .02 .02 .01 .02 .02 .00 .00 .00 .00 .01 .00 .01 .01 .01 .00 .17 (2) .01 .00 .02 .02 .01 .02 .02 .00 .00 .00 .00 .01 .00 .01 .01 .01 .00 .17 C-3 222 151 119 115 139 190 250 162 91 45 21 28 30 51 77 169 0 1860 (1) 2.65 1.80 1.42 1.37 1.66 2.27 2.98 1.93 1.09 .54 .25 .33 .36 .61 .92 2.02 .00 22.19 (2) 2.65 1.80 1.42 1.37 1.66 2.27 2.98 1.93 1.09 .54 .25 .33 .36 .61 .92 2.02 .00 22.19 4-7 295 86 54 53 62 171 356 392 224 56 38 38 59 63 88 604 0 2639 (1) 3.52 1.03 .64 .63 .74 2.04 4.25 4.68 2.67 .67 .45 .45 .70 .75 1.05 7.21 .00 31.48 (2) 3.52 1.03 .64 .63 .74 2.04 4.25 4.68 2.67 .67 .45 .45 .70 .75 1.05 7.21 .00 31.48 8-12 272 56 10 4 14 45 136 277 359 94 62 55 136 126 96 529 0 2271 (1) 3.24 .67 .12 .05 .17 .54 1.62 3.30 4.28 1.12 .74 .66 1.62 1.50 1.15 6.31 .00 27.09 (2) 3.24 .67 .12 .05 .17 .54 1.62 3.30 4.28 1.12 .74 .66 1.62 1.50 1.15 6.31 .00 27.09 13-18 112 20 5 3 2 13 17 31 200 41 20 19 96 178 106 342 0 1205 (1) 1.34 .24 .06 .04 .02 .16 .20 .37 2.39 .49 .24 .23 1.15 2.12 1.26 4.08 .00 14.37 (2) 1.34 .24 .06 .04 .02 .16 .20 .37 2.39 .49 .24 .23 1.15 2.12 1.26 4.08 .00 14.37 19-24 38 2 1 1 0 2 3 1 36 6 2 1 10 54 44 130 0 331 (1) .45 .02 .01 .01 .00 .02 .04 .01 .43 .07 .02 .01 .12 .64 .52 1.55 .00 3.95 (2) .45 .02 .01 .01 .00 .02 .04 .01 .43 .07 .02 .01 .12 .64 .52 1.55 .00 3.95 GT 24 4 0 0 0 0 1 0 0 1 0 0 0 2 9 7 39 0 63 (1) .05 .00 .00 .00 .00 .01 .00 .00 .01 .00 .00 .00 .02 .11 .08 .47 .00 .75 (2) .05 .00 .00 .00 .00 .01 .00 .00 .01 .00 .00 .00 .02 .11 .08 .47 .00 .75 ALL SPEEDS 944 315 191 178 218 424 764 863 911 242 143 142 333 482 419 1814 0 8383 (1) 11.26 3.76 2.28 2.12 2.60 5.06 9.11 10.29 10.87 2.89 1.71 1.69 3.97 5.75 5.00 21.64 .00 100.00 (2) 11.26 3.76 2.28 2.12 2.60 5.06 9.11 10.29 10.87 2.89 1.71 1.69 3.97 5.75 5.00 21.64 .00 100.00 (1)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)=PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C= CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)43 APPENDIX A SUPPLEMENTAL INFORMATION Facility:

Vermont Yankee Nuclear Power Station Licensee:

Entergy Nuclear Vermont Yankee 1 A ODCM DOSE AND DOSE RATE LIMITS -ODCM Controls Dose Limit a. Noble Gases 3/4.3.1 3/4.3.1 3/4.3.2 3/4.3.2 3/4.3.2 3/4.3.2 Total body dose rate Skin dose rate Gamma air dose Gamma air dose Beta air dose Beta air dose 500 mrem/yr 3000 mrem/yr 5 mrad in a quarter 10 mrad in a year 10 mrad in a quarter 20 mrad in a year b. Iodine-131, Iodine-i133, Tritium and Radionuclides in Particulate Form With Half-Lives Greater Than 8 Days 3/4.3.1 3/4.3.3 3/4.3.3 Organ dose rate Organ dose Organ dose 1500 mrem/yr 7.5 mrem in a quarter 15 mrem in a year c. Liquids 3/4.2.2 Total body dose 3/4.2.2 Total body dose 3/4.2.2 Organ dose 3/4.2.2 Organ dose 1.5 mrem in a quarter 3 mrem in a year 5 mrem in a quarter 10 mrem in a year 2A.ODCM LIMITS -CONCENTRATION ODCM Control Limit a. Noble Gases No ECL Limits b. Iodine-I131, Iodine-i133, Tritium and Radionuclides in Particulate Form With Half-Lives Greater Than 8 Days No ECL Limits A-1 C. Liqiuids 3/4.2.1 Sum of the fractions of ECL excluding noble gases (1OCFR20, Appendix B, Table 2, Column 2): < 1.OE+01 3/4.2.1 Total noble gas concentration:

< 2E-04 .iCi/cc 3. AVERAGE ENERGY Provided below are the average energy (E) of the radionuclide mixture in releases of fission and activation gases, if applicable.

a. Average gamma energy: Not Applicable

b. Average beta energy: Not Applicable

4. MEASUREMENTS AND APPROXIMATIONS OF TOTAL RADIOACTIVITY Provided below are the methods used to measure or approximate the total radioactivity in effluents and the methods used to determine radionuclide composition.

a. Fission and Activation Gases Continuous stack monitors monitor the gross Noble Gas radioactivity released from the plant stack. Because release rates are normally below the detection limit of these monitors, periodic grab samples are taken and analyzed for the gaseous isotopes present. These are used to calculate the individual isotopic releases indicated in Table lB and the totals of Table IA. The error involved in these steps may be approximately

+/-23 percent.b. lodines Continuous isokinetic samples are drawn from the plant stack through a particulate filter and charcoal cartridge.

The filters and cartridges are normally removed weekly and are analyzed for Iodine-131, 132, 133, 134, and 135. The error involved in these steps may be approximately

+/-18 percent.A-2

c. Particulates The particulate filters described in b. above are also counted for particulate radioactivity.

The error involved in this sample is also approximately

+/-18 percent.d. Tritium ODCM Table 4.3.1 requires as a minimum that grab samples from the plant stack be taken monthly and analyzed for tritium. The stack tritium collection has been upgraded with silica gel columns and continuous sampling of stack effluents.

The error involved in this sample is approximately

+/-10 percent.e. Waste Oil Prior to issuing the permit to burn a drum of radioactively contaminated waste oil, one liter of the oil is analyzed by gamma spectroscopy to determine concentrations of radionuclides that meet or exceed the LLD for all of the liquid phase radionuclides listed in ODCM Table 4.2.1.Monthly, samples from drums that were issued burn permits are sent to the contracted laboratory for compositing and analysis.

The lab analyzes for tritium, alpha, Fe-55, Sr-89, and Sr-90 on the composite sample.The error involved in this sample is approximately

+/-15 percent.f. Liquid Effluents If radioactive liquid effluents are to be released from the facility, they are continuously monitored.

Measurements are also required on a representative sample of each batch of radioactive liquid effluents released.

For each batch, station records are retained of the total activity (mCi) released, concentration (gtCi/ml) of gross radioactivity, volume (liters), and approximate total quantity of water (liters) used to dilute the liquid effluent prior to release to the Connecticut River.Each batch of radioactive liquid effluents to be released is analyzed for gross gamma and gamma isotopic radioactivity.

A monthly proportional composite sample, comprising an aliquot of each batch released during a month, is analyzed for tritium and gross alpha radioactivity.

A quarterly proportional composite sample, comprising an aliquot of each batch released during a quarter, is analyzed for Sr-89, Sr-90, and Fe-55.A-3

5. BATCH RELEASES a. Liquid There were no routine liquid batch releases during the reporting period.b. Gaseous There were no routine gaseous batch releases during the reporting period.6. ABNORMAL RELEASES a. Liqui 1) In 2011 there was a continuous release due to a previously undetected leak from a subsurface structure.

The leak condition was identified through monitoring well data in January 2010. The leak was stopped in February 2010.2) For 2011, the total Tritium radioactivity conservatively estimated to be released to the Connecticut River is 2.82 Curies. No other plant-related radionuclides were detected in ground water.b. Gaseous There were no non-routine gaseous releases (measured) during the reporting period.A-4 APPENDIX B LIQUID HOLDUP TANKS Requirement Response: Technical Specification 3.8.D. I limits the quantity of radioactive material contained in any outside tank. With the quantity of radioactive material in any outside tank exceeding the limits of Technical Specification 3.8.D. 1, a description of the events leading to this condition is required in the next annual Radioactive Effluent Release Report per ODCM Section 10.1.The limits of Technical Specification 3.8.D. 1 were not exceeded during this reporting period.B-1 APPENDIX C RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION Requirement:

Response: Radioactive liquid effluent monitoring instrumentation channels are required to be operable in accordance with ODCM Table 3.1.1. If an inoperable radioactive liquid effluent monitoring instrument is not returned to operable status prior to a release pursuant to Note 4 of Table 3.1.1, an explanation in the next annual Radioactive Effluent Release Report of the reason(s) for delay in correcting the inoperability are required per ODCM Section 10.1.Since the requirements of ODCM Table 3.1.1 governing the operability of radioactive liquid effluent monitoring instrumentation were met for this reporting period, no response is required.C-1 APPENDIX D RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION Requirement:

Response: Radioactive gaseous effluent monitoring instrumentation channels are required to be operable in accordance with ODCM Table 3.1.2. If inoperable gaseous effluent monitoring instrumentation is not returned to operable status within 30 days pursuant to Note 5 of Table 3.1.2, an explanation in the next annual Radioactive Effluent Release Report of the reason(s) for the delay in correcting the inoperability is required per ODCM Section 10.1.Since the requirements of ODCM Table 3.1.2 governing the operability of radioactive gaseous effluent monitoring instrumentation were met for this reporting period, no response is required.D-1 APPENDIX E Requirement:

Response: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM The radiological environmental monitoring program is conducted in accordance with ODCM Control 3/4.5.1. With milk samples no longer available from one or more of the sample locations required by ODCM Table 3.5.1, ODCM 10.1 requires the following to be included in the next annual Radioactive Effluent Release Report: (1) identify the cause(s) of the sample(s)no longer being available, (2) identify the new location(s) for obtaining available replacement samples and (3) include revised ODCM figure(s) and table(s) reflecting the new location(s).

No changes were needed in the milk sampling locations as specified in ODCM Table 3.5.1 and implemented in ODCM Table 7.1 during the reporting year.E-1 APPENDIX F LAND USE CENSUS Requirement:

Response: A land use census is conducted in accordance with ODCM Control 3/4.5.2.With a land use census identifying a location(s) that yields at least a 20 percent greater dose or dose commitment than the values currently being calculated pursuant to ODCM Control 4.3.3, the new location(s) must be identified in the next Annual Radioactive Effluent Release Report.The Land Use Census was completed during the third quarter of 2011. No locations were identified which yielded a 20 percent greater dose or dose commitment than the values currently being calculated pursuant to ODCM Control 4.3.3.F-1 APPENDIX G PROCESS CONTROL PROGRAM Requirement:

ODCM Section 10.1 requires that licensee initiated changes to the Process Control Program (PCP) be submitted to the Commission in the annual Radioactive Effluent Release Report for the period in which the change(s) was made.There were no changes made to the Process Control Program during this reporting period.Response: G-1 APPENDIX H OFF-SITE DOSE CALCULATION MANUAL Requirement:

Technical Specification 6.7.B. 1 requires that licensee initiated changes to the Off-Site Dose Calculation Manual (ODCM) be submitted to the Commission in the annual Radioactive Effluent Release Report for the period in which the change(s) was made effective.

Response:

During the reporting period, Revision 34 was made to the ODCM.Four main sections of the ODCM were modified with significant changes to incorporate the contaminated groundwater discharge pathway to the Connecticut River: " Section 3 / 4 was revised to include the subsurface groundwater pathway in the Liquids Discharge description.

Groundwater monitoring wells used to determine the extent of these releases are listed. The Southwest Well was added as Ground (Potable Drinking)

Water sample location in the REMP description of Section 3 / 4." Section 5 was revised to include a description of the determination of plant generated radionuclide concentrations in groundwater discharges.

Section 6 was revised to include methods for calculating radiation dose from plant generated radionuclides in groundwater discharges." Section 9 was revised to include the method for determination of groundwater flows in the 17 identified streamtubes flowing from the plant site to the Connecticut River.In addition to revisions of four main sections of the ODCM, the Table of Contents, Definitions, and References Sections of the ODCM were revised to reflect the additional subsections, figures, tables, definitions and references in the ODCM.H-1 APPENDIX I RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS Requirement:

ODCM Section 10.4 requires that licensee initiated major changes to the radioactive waste systems (liquid, gaseous, and solid) be reported to the Commission in the annual Radioactive Effluent Release Report for the period in which the evaluation was reviewed by the Plant Operation Review Committee.

Response:

There were no licensee-initiated major changes to the radioactive waste systems during this reporting period.I-1 APPENDIX J ON-SITE DISPOSAL OF SEPTIC/SILT/SOIL WASTE Requirement:

Response: Off-Site Dose Calculation Manual, Appendices B, F and I require that the dose impact due to on-site disposal of septic waste, cooling tower silt, and sand/soil type materials during the reporting year and from previous years be reported to the Nuclear Regulatory Commission in the annual Radioactive Effluent Report if disposals occur during the reporting year. Entergy Nuclear Vermont Yankee will report in the Annual Radioactive Effluent Release Report a list of the radionuclides present and the total radioactivity associated with the on-site disposal activities on the Vermont Yankee site.There was one on-site disposal spreading activity of 11,000 gallons of contaminated septic waste during July of the reporting year, and no spreading activities for cooling tower silt or sand/soil type materials.

The total radioactivity spread on the 1.9 acres (southern) on-site disposal field from the 2011 spreading and from previous years was as follows: Radionuclide Mn-54 Co-60 Zn-65 Cs- 134 Cs-137 Activity Spread in 2011 (Cj)0 4.79E-06 0 0 0 Activity from 2011, Plus Activity from All Past Disposals Decayed to 7/28/2011 3.60E-07 2.12E-05 2.82E-07 2.77E-09 8.26E-05 The maximum organ dose from all past spreading operations, including the material spread in 2011, totaled 1.26E-0 I mrem/year.

These calculated values are within the 1 mrem/year limit applied during the period of operational control of the site. The projected hypothetical "intruder" dose for the period following the loss of operational control of the site area due to all spreading operations to-date is 5.90E-01 mrem/year versus a 5 mrem/year dose limit. Note that the extension of the plant license has not been factored in to the "intruder dose" at this time.J-1

@@ Line 3: / Line 3: @@
 | issue date = 05/08/2012
 | title = Entergy Nuclear Vermont Yankee, LLC, Radioactive Effluent Release Report for 2011 Including Annual Radiological Impact on Man
-| author name = Cumming E R
+| author name = Cumming E
 | author affiliation = Entergy Nuclear Vermont Yankee, LLC
 | addressee name =

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