Reno Creek Project Update NRC Sidebar · 2019. 7. 12. · Water 3.52 TOTAL 6,057.43 06/17/2011. The...
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The Reno Creek Project Reno Creek Project Update NRC Sidebar 06/17/2011
Transcript of Reno Creek Project Update NRC Sidebar · 2019. 7. 12. · Water 3.52 TOTAL 6,057.43 06/17/2011. The...
The Reno Creek Project
Reno Creek Project UpdateNRC Sidebar
06/17/2011
The Reno Creek Project
Reno Creek WDEQ UpdateMay 10 2011
AUC P ti i t
May 10, 2011
• AUC Participants• Regulatory process update• Update on ecological surveys, wetlands• Meteorological updateMeteorological update• Preliminary MILDOS run
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The Reno Creek Project
AUC LLCParticipantsParticipants
• Jim Viellenave – PresidentJim Viellenave President• Leland Huffman – Operations Manager
D D Chi f G l i t• Dan Dowers – Chief Geologist• Phil Cavendor – Environmental Manager• Bob Meyer – Tetra Tech• Larry McGonagle – Tetra TechLarry McGonagle Tetra Tech• Craig Little – Tetra Tech
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The Reno Creek Project
Regulatory Process UpdateProcess Update
• Development of SOPsDevelopment of SOPs• Regulatory review
E l BKS d WDEQ LQD fi ld t i• Example: BKS and WDEQ LQD field trip– Vegetation mapping– Soils mapping– Wetlands
• SOP approved May 2011
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The Reno Creek Project
Vegetation UpdateMappingMapping
• Mapping of vegetation communities wasMapping of vegetation communities was conducted in October 2010.Vegetation Community Permit Area AcreageUpland Grassland 475.52Meadow Grassland 483.34Meadow Grassland 483.34Big Sagebrush Shrubland 4,756.56Breaks Grassland 69.95Disturbed 268 54Disturbed 268.54Water 3.52TOTAL 6,057.43
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The Reno Creek Project
Vegetation UpdateSampling and SurveysSampling and Surveys
• Vegetation sampling will be conducted inVegetation sampling will be conducted in June 2011.
Following sampling methodology approved by– Following sampling methodology approved by WDEQ May 2010.
• T&E habitat and species surveys will be• T&E habitat and species surveys will be finished in:
Blowout Penstemon June 2011– Blowout Penstemon – June 2011– Ute ladies-tresses’ – August 2011
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The Reno Creek Project
Vegetation UpdateRadionuclide SamplingRadionuclide Sampling
• Sampling was conducted in SeptemberSampling was conducted in September 2010.
Simulated grazing technique was utilized– Simulated grazing technique was utilized.– Three locations near the air monitoring
stations 2 and 4stations 2 and 4.• Sampling will be conducted in:
M /J 2011– May/June 2011– July/August 2011
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The Reno Creek ProjectWetland Update
• Wetland assessments were conducted inWetland assessments were conducted in November 2010.
• A spring assessment will be carried out in• A spring assessment will be carried out in late May 2011.
Th i t ill b d t– The spring assessment will be done to observe any water or spring flow that may occur in the drainages within the project areaoccur in the drainages within the project area that was not present in the fall. It will also be to survey areas not covered in the fall yassessment.
06/17/2011
The Reno Creek ProjectSoils Update
• Soil mapping and sampling was conducted inSoil mapping and sampling was conducted in October 2010.
• Reno Creek Soils should not hinder future reclamation efforts:– Potential salvage depths range from 2” to 43”– Marginal suitability only due to fine textures and
selenium concentrations – generally @ lower depthsR t t b d f i l i thi• Reno property to be mapped for inclusion this summer.
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The Reno Creek Project
Meteorological UpdateUpdate
• AUC has onsite met station and secondaryAUC has onsite met station and secondary anemometer at other end of permit area
• Procedure to establish representativeness• Procedure to establish representativeness of short term monitoring (~1 year) at onsite stationstation– Strategy for statistical evaluation
P d f i it iti– Procedure for air monitor siting
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The Reno Creek Project
Statistical EvaluationEvaluation
• Objective: determine the stability of windObjective: determine the stability of wind roses at multiple regional sites
Calculate mean and standard deviation of the– Calculate mean and standard deviation of the frequency at each wind direction over multiple yearsy
– Determine if the variance in the frequency for each direction is significant enough to cause g ginaccurate siting of down wind air monitors if a single year is used
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The Reno Creek Project
Windrose StabilityAntelope 2004-2010Antelope 2004-2010
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The Reno Creek Project
Windrose StabilityGlenrock 2003-2009Glenrock 2003-2009
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The Reno Creek Project
Windrose StabilityGillette 2005-2010Gillette 2005-2010
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The Reno Creek Project
Windrose StabilityBlack Thunder 2001-2010Black Thunder 2001-2010
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The Reno Creek Project
Windrose StabilityJacobs Ranch 2001-2010Jacobs Ranch 2001-2010
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The Reno Creek Project
Reno Creek WindroseSeven MonthsSeven Months
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The Reno Creek Project
Meteorological Station LocationsAnd On-Site Wind Roses
Wyoming Highway
387
20 211923222423
510,000 FT 515,000 FT 520,000 FT 525,000 FT 530,000 FT 535,000 FT 540,000 FT 545,000 FT
Wy20 21 23222423
1,16
0,00
0 FT
1,160,000 FT
262830 272926 25
Reno Creek Project Area
1,15
5,00
0 FT
1,155,000 FT
T43N R73WT42N R73WT42N R74W
T43N R74W
3231 33 353435 36
1,15
0,00
0 FT
1,150,000 FT
y 387
24 3562 1
1,14
5,00
0 FT
1,145,000 FT
Anemometer
06/17/2011Coordinate System: Wyoming State Plane East (NAD83)
Wyoming Highway 3
8 1197 101211
1,14
0,00
0 FT
1,140,000 FT
510,000 FT 515,000 FT 520,000 FT 525,000 FT 530,000 FT 535,000 FT 540,000 FT 545,000 FTFEET
0 2,500
Anemometer
The Reno Creek Project
Preliminary Estimation of Maximum Potential Doses to Members of the Public
• The USNRC License Application Requires Estimation of Maximum Potential Doses to Members of the Public
• The MILDOS computer code provides an acceptableThe MILDOS computer code provides an acceptable method to calculate these doses
• The code is also a valuable tool to provide assistance fand direction during ongoing facility siting and
engineering design work• AUC is currently using a limited but site-specific set ofAUC is currently using a limited, but site specific, set of
meteorological data as MILDOS input• AUC has developed an initial facility design to provide
MILDOS di lid t i tMILDOS radionuclide source term input
The Reno Creek Project
Development of Preliminary Dose Estimates
• Using available information, AUC presentsUsing available information, AUC presents preliminary draft public dose estimates, for discussion with the USNRC and to provide guidance d i dditi l AUC d i kduring additional AUC design work.
• These MILDOS dose estimates will be recalculated prior to submittal of a license applicationprior to submittal of a license application
• Updated input values (see next slide) will be incorporated into the next set of MILDOS code runsincorporated into the next set of MILDOS code runs
The Reno Creek Project
Preliminary MILDOS ParametersParameters
• The site specific meteorological data set will be extended• The site-specific meteorological data set will be extended from the 7-month coverage used here, to 12+ months
• Additional design work will provide refined estimates of g pradionuclide release rates (source term values)
• A specific CPP location will be substituted for the generic location used in this initial set of MILDOS runslocation used in this initial set of MILDOS runs.
AUC does not expect significant changes in terms ofAUC does not expect significant changes, in terms of compliance with public dose limits, as a result of the planned
fine-tuning of input parameters.
The Reno Creek Project
Preliminary Source Term AssumptionsTerm Assumptions
• Annual production – 1,600,000 lb U3O8 / yr• Production flow rate – 8,000 gpm• Production patterns in operation – 400• Restoration flow rate – 1,050 gpm• Restoration patterns in operation – 55• Average radium concentration in ore – 197
pCi/gpCi/g
The Reno Creek Project
Source Term EstimatesWorst Case - Annual Radon Releases
Ci/yrCi/yr
• Production purge & 45.3IX column operation at CPP
• Production well field venting 407Production well field venting 407
• Restoration purge 382
• New well drilling 0.176
The Reno Creek Project
Wind Rose AfterConversion for MILDOS
Data Observations:Data Observations:• Dominant winds are from
the SW and WSW (35%)S d f th• Secondary from the WNW – NNW (28%)
• Small component from pSE
• NE quadrant represents less than 5%less than 5%
The Reno Creek Project
PreliminaryModeling AssumptionsModeling Assumptions
• For these preliminary runs, all sources wereFor these preliminary runs, all sources were assumed to be located at the site centroid
• No elevation data were appliedpp• The total estimated doses result from four
sources:– Production purge & IX column operation at
CPP– Production well field venting – Restoration purge at CPPp g– New well drilling
The Reno Creek Project
Preliminary MILDOSResults
MILDOS Results
Results
2.50E+02
TEDE by Distance from Center by Direction - All Sources Co-located
MILDOS Results
2.00E+02
N
1.00E+02
1.50E+02
TED
E (m
rem
/yr) NE
E
SE
S
5.00E+01
SW
W
NW
0.00E+00
0 200 400 600 800 1000 1200
Distance from center point (m)
The Reno Creek Project
TEDE Plotted as Isodose CurvesFrom Site Center
100 mrem TEDETEDE
The Reno Creek Project
Preliminary Isodose CurvesShowing N and S Site Boundaries
100 mrem per yr
(second(second ring)
2020 mrem per yr (outer ring)ring)
The Reno Creek Project
MILDOS Estimates:Preliminary ObservationsPreliminary Observations
• There are no doses from released radioactive particulates; all doses are associated with radonparticulates; all doses are associated with radon
• Calculated TEDE (Total Effective Dose Equivalent) is less than 100 mrem at a 200 mEquivalent) is less than 100 mrem at a 200 m radius from the CPP, in any direction
• Maximum TEDE at 200 m is 60 mrem in the NEMaximum TEDE at 200 m is 60 mrem in the NE direction
• MILDOS results currently appear to be a minimal y ppfactor in facility siting
The Reno Creek Project
Preliminary Conclusions
• Reno Creek site operations are not expected to result in doses to members of the public exceeding applicable limits.exceeding applicable limits.
• Final MILDOS runs will incorporate updated data i l di t l i l t d ifiincluding meteorological, source term and specific facility location information, but MILDOS results are expected to be similar to those presented hhere.
