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Home My WebLink AboutDRC-2019-011923 - 0901a06880b2b672DRC- 2019-0 I 19Z3 UTAH DIVISION OF WAS 1E MANAGEMENT AND RADIATION CONTROL RML # UT1900479 ENERGY FUELS RESOURCES WHITE MESA MILL INSPECTION MODULE EM-01 SEMI-ANNUAL EFFLUENT MONITORING REPORT REPORTING PERIOD: January 1, 2019 through June 30, 2019 References: Utah Administrative Code R313-24-4; 10CFR40.65; Radioactive Materials License UT1900479; 10CFR20 Table II of Appendix B; NRC Regulatory Guide 4.14; 2007 License Renewal Application Inspector Russ Topham Date October 2, 2019 10CFR40.65(a)(1) requires the licensee to submit a report within 60 days after January 1 and July 1 of each year. The report must specify the quantity of each of the principal radionuclides released to unrestricted areas in liquid and in gaseous effluents during the previous six months of operation. 1. Did the licensee submit the report within 60 days of the end of the reporting period i.e., January 1st or July 1st? (10CFR40.65(a)(1)) Yes El No 1-1 Comments: The Semi-Annual Effluent Monitoring Report for the 1st half of 2019 for the White Mesa Mill was submitted on August 27, 2019 Page 1 of 8 2. Were the stack samples analyzed for U-nat, 230Th, 226Ra and 21°Pb? (NRC Reg Guide 4.14) and Th- 228, Th-232 and Ra-228 (L.C. 11.9) Yes 1 No 11] Comments: Stack sampling occurred only during quarters when the stack was operated. 3. Were site boundary effluent air samples analyzed for U-nat, 230Th, 226Ra an ,a 210, -rb? (NRC Reg Guide 4.14) and Th-232 (L.C. 11.9) Yes [E] No 0 10CFR20 Appendix B Table 2 first paragraph states "The columns in Table 2 of this appendix captioned "Effluents," "Air," and "Water," are applicable to the assessment and control of dose to the public, particularly in the implementation of the provisions of š' 20.1302. The concentration values given in Columns 1 and 2 of Table 2 are equivalent to the radionuclide concentrations which, i f inhaled or ingested continuously over the course of a year, would produce a total effective dose equivalent of 0.05 rem (50 millirem or 0.5 millisieverts)." Comments: Sampling results were below ECLs for all analyzed isotopes at all monitoring locations for the last four quarters, and for the year. See the attached Particulate, Radon and Gamma Screening analysis for a summary of quarterly and annual data and a calculated dose at each of the high-volume air stations. ' Page 2 of 8 10CFR20 Table II of Appendix B, ECL's: U-nat 9.0E14 µCi/m1 in air 2.0E14 p,Ci/m1 in air.. 9.3E13 p,Ci/m1 in air.. 6.0E13 µCi/m1 in air.. 230Th 226Ra 210pb • • . • - • µCi/m1 in air p,Ci/m1 in air p,Ci/m1 in air µCi/m1 in air 25% = 2.25E14 .25% = 5.15E15 .25% = 2.33E13 .25% = 1.50E13 4. Were the site boundary effluent air sample results within applicable limits for U-nat, 230Th, 226Ra and nor,b? (10CFR20 Table II of Appendix B) 10CFR20 Table II of Appendix B, ECUs: 9.0E14 pCi/m1 in air 2.0E14 p,Ci/m1 in air 9.3E µCi/m1 m arr 6.0E13 µCi/m1 in air Yes Z No Comments: 5. Did the results of the effluent monitoring for this reporting period achieve the site's ALARA objective of 25% of the ECUs? (2007 License Renewal Application Vol. 1 Section 6.5; 10CFR20 Table II of Appendix B) Yes Z No El Comments: See the attached Particulate, Radon and Gamma Screening analysis for a summary of quarterly and annual data and a calculated dose at each of the high-volume air stations. The summary compares total dose to the mill's ALARA goal and to the annual 100 mrem exposure limit U-nat 230Th 226Ra 210pb Page 3 of 8 6. Were Gamma Measurements (Minus Background) Collected at each Monitoring Station? Yes Z No Comments: See the attached Particulate, Radon and Gamma Screening analysis for a summary of quarterly and annual data and a calculated dose at each of the high-volume air stations. 7. Were soil samples analyzed for U-nat, 226Ra and 210Pb? (NRC Reg Guide 4.14) Yes Z No 0 N/ALjJ Comments: Soil sampling occurred during the first half of the year. 8. Were vegetation samples analyzed for 226Ra and 210=s+ (NRC Reg Guide 4.14) and U-Nat and Th- 232 (LC??) Yes Z No 111 Comments: Vegetation sampling occurred during the first half of the year. Page 4 of 8 9. Were radon samples (minus background) taken at Sample Stations BHV-1, BHV-2, BHV-4, BHV- 5, BHV-6, BHV-7 and BHV-8? (NRC Reg Guide 4.14) Yes [ZI No El Comments: ECLs in 10 CFR 20 Appendix B Table 2 assume either no daughters present or 100% ingrowth. Calculated ECLs account for partial ingrowth using methodology in EPA 520/1-88-009 p. 2-20. Calculated ECLs result in maximum exposure of 25 mrem/yr vs. 50 mrem/yr using Table 2 value. Regulatory limit is 100 mrem/yr. See the attached Particulate, Radon and Gamma Screening analysis for a summary of quarterly and annual data and a calculated dose at each of the high-volume air stations. 10. Were radon samples analyzed for 222Rn9 (NRC Reg Guide 4.14) Yes Z No Comments: 11. Were the 222Rn results within the calculated ECL's for the yearly average results for the last four quarters? Yes Z No I=1 Comments: See the attached Particulate, Radon and Gamma Screening analysis for a summary of quarterly and annual data and a calculated dose at each of the high-volume air stations. Note that the year ending 31 March 2019 showed an exceedance by 0.01 pCi/L at BHV-1 of the calculated ECL, based on a 25 mrem/yr exposure limit. Table 2 values are based on a 50 mrem/yr limit. The screening summary attached to this report retains the lower exposure limit to be consistent with the method used to set the reported ECL. BHV-1 did not exceed the regulatory limit from Table 2. Page 5 of 8 License Condition 11.2.D requires the licensee to utilize lower limits of detection in accordance with Section 5 of the NRC Regulatory Guide 4.14, as amended, for analysis of effluent and environmental samples. 12. Were lower limits of detection (LLD) for analysis of stack effluent samples 10% or less of the limits found in 10CFR20 Table II of Appendix B for U-nat, 230Th, 226Ra and 210pb? (NRC Reg Guide 4.14) 10CFR20 Table II of Appendix B. ECL's: U-nat .9.0E14 pEi/m1 230Th 2 0E14 µCi/m1 226Ra 9 3E13 µCi/ml 210pb 6.0E13 µCi/ml 10% = 9.0E15 µCi/m1 10% = 2.0E15 p.Ci/m1 10% = 9.3E14 p.Ci/m1 10% = 6.0E14 p.Ci/m1 Yes Z No El Comments: LLDs in the analytical reports are called CRDL or RLs and they are identical to the numbers listed above. 13. Were lower limits of detection (LLD) for analysis of site boundary air effluents within the limits listed in NRC Regulatory Guide 4.14 Section 5 for U-nat, 230Th, 226Ra and 2101-'b (NRC Reg Guide 4.14) NRC Regulatory Guide 4.14 Section 5 LLD values in air): 1.0E1 p.Ci/m1 1 0E16 piCi/m1 226Ra 1 OE 16 • µCi/m1 - 2 0E15 µCi/m1 Yes I No El Comments: The LLDs from documented in the analytical report are: U-nat 1E-16, Th-230 1E-16; Ra-226 1E-16 ,& Pb-210 2E-15 U-nat 230Th 210pb Page 6 of 8 14. Were lower limits of detection (LLD) for analysis of site boundary soil samples within the limits listed in NRC Regulatory Guide 4.14 Section 5 for U-nat, 226Ra and 210pb? NRC Regulatory Guide 4.14 Section 5 LLD values (in soil): U-nat 2.0E7 µCi/g 226Ra 2 0E7 µCi/g nopb 2 0E7 liCi/g Yes Z No LII N/A Comments: 15. Were lower limits of detection (LLD) for analysis of site boundary vegetation samples within the limits listed in NRC Regulatory Guide 4.14 Section 5 for 226Ra and 210pb? NRC Regulatory Guide 4.14 Section 5 LLD values (in vegetation): U-nat 2.0E7 [Xi/kg 226Ra 5 0E8 tiCi/kg 210pb 1 0E6 µCi/kg Yes Z No Z Comments: Page 7 of 8 Russ Topham Prepared By: (Print Name) Reviewed By: Phil Goble 16. Were lower limits of detection (LLD) for analysis of radon samples within the limits listed in NRC Regulatory Guide 4.14 Section 5 for 222Rn9 NRC Regulatory Guide 4.14 Section 5 LLD values for radon: 222Rn -10 2 OE µCi/ml (0.2pCi/L) Yes E] No 0 Comments: White Mesa Environmental Protection Manual Section 1.4, STACK EMMISIONS MONITORING PROCEDURES, sub-section 1.0, INTRODUCTION, states, "These sampling methods are also consistent with guidance contained in the U.S. Nuclear Regulatory Commission's Regulatory Guide 4.14, "Radiological Effluent and Environmental Monitoring at Uranium Mills." 17. Were the yellowcake dryer and packaging stacks sampled in accordance with Regulatory Guide 4.14 Section 2.1.1? Quarterly samples at North Yellowcake Dryer and Yellowcake Baghouse for: U-nat Semi-annual samples at North Yellowcake Dryer and Yellowcake Baghouse for: 230Th 226Ra 21opb Yes 0 No [E] Comments: Yellowcake was not produced during the reporting period. (Print Name) (Signature) (Date) Page 8 of 8 Year Ending 31-Mar-19 PARTICULATE, RADON AND GAMMA SCREENING Quarter Ending Analysis of Annual Dose Constituent Location 30-Jun-18 30-Sep-18 31-Dec-18 31-Mar-19 Annual ECL Below ECL? mrem/yr 1 Ra dio a c tiv e P a rtic u la te s I . r 0,191P1- 1 '.. BHV-1 OE-16 •• I.4.0E-16 F•.2•1.5E-15 •1,5E-15 :..:.:411E-15 zE-14- Yes 0.58 BHV-2 3.8E-16 •-1.0E-16 5.0E-16 ::. • 5.0E-16 3.7E-16 9E-14 Yes 0.21 . BH.V4 1.5E-15 2.2E-15 3.4E-15 .3.4E-15 2.6E-15 9E14 Yes 1.46 ,.BHV-5 2.6E-15 2.2E-15 .• '6.0E-15 :,..6,0E-15 4.2E15 9E-14- Yes 2.33 BHV-6 3 0E1.5 I • 3.1E15 7.9E7.15 7.9E-15 5.5E15 -9E-14 Yes 3.04 BHV-7 1..6E15 . ...II...0E15 ... 1.9E-15 .. 1.9E-15 1.6E15 :...1.:. 9E14 Yes 0.89 BHV-8 9.4E-16 • • '6.0E-16 :. 1.5E-15 :!:. 1.5E-15 1.1E1.5 9E-14 Yes 0.63 ?" pCi/mr..) • ...BHV-1 1.2E-16 9.0E-17 5,0E-17 5.0E17 7,8E-17. 2E-14- Yes 0.19 BHV-2 4.6E-17 . 2.0E17 ..2,0E-17 2.0E17 -.2.7E17 •. -, ..2E-14 . Yes 0.07 • BHV-4 8.2E-1.7: ....II• :2.0E-16 2.0E-16 2.0E-16 "1:7E-16 • 2E-1:4 Yes 0.43 BHV-5 2.4E-16 .• : '10E-16 • 3.0E16. ..• 3.0E-16 . 2.9E-16 I• 2E14 Yes 0.71 BHV-6 9.7E17 2.0E-16 • 2.0E16 ••.::: 2.0E-16 1.7E46 2E14 Yes 044 BHVj 2.2E-16 2.0E-16.1: :1..0E-16 •1.0E-16 •. 1.6E-16 • • '2E14 Yes 0.39 BHV-8 1.2E-16. 9.0E47 . •.:7.0E-17, 7.0E717 ...8:8E-17 2E.-.14 Yes 0.22 ., . .. pQi/mL) .. :•:•BHV-1 ..: 2.5E-16 • 7.0E17 ::2.0E-17 • 2.0E-17 .9.0E17 !:' 9E-13, Yes - 0.01 • BHV-2 : 1.2E16 .3.0E-17 • : 1.0E-17 1.0E-17 4.3E-17 • .9E-13 Yes 0.00 BHV-4 .• 31E-17 '1.0E-16 4.0E-1:7 .. 4.0E-17 .. 5.4E-17 : ..98"-13 Yes 0.00 .BHV-5 .• 5.9E-16 1.0E-16 • 1:0E-16 ....0E-16 4 . 2 2E-16 . 9E-13 Yes 0.01 •.i.BHV-6 :ThliV-7 1.0E-16 5.0E17 3.0E17 I 3.0E-17 i :53E17 •'•9E13 Yes 0.00 . • 1.3E-1.6 ..... ..1.0E16 2.0E17 '2.0E-17 • '6.8E-17 9E-13 Yes 0.00 :•'• BHV-8 3.0E-16 6.0E17 ••• 3.0E-17 3.0E-17 1.1E-16 •• 9E-13 Yes 0.01 ,2•1 „ BHV-1 • :.,..:,::1:2E-14 .1.0E14 2.0E-14 • ...: .2.0E14 1.6E=14, 6E13 Yes 1.29 BHV-.2 BHV-4 ..• 1.3E-14 1.0E-14 ... 2.0E-14 2.0E-14 ..... 1.6E14 ..6E13 Yes 1.31 ' 1.1E-14 1.0E-14 • .2.0E-14 .2.0E-14 . 1.5E-14' 6E-13 Yes 1.27 I..BHV-5 1.2E14 ..• .10E14 . :•.2.0E-14 . : 2.0E-14 1.6E14 .: 6E-13 Yes 1.29 pci/mL • 9 BHV-6 2.1... 1.2E-14 . 2.0E-14 2.0E-14 :": 2.0E-14 1.8E-14 1 • 6E3 Yes 1.50 BHV-7 • • 1.2E-14 2,0E-14 1.0E14 , 1.0E-14 1.3E-14 6E-13 Yes 1.08 BHV.+,8 • • 8.8E-15 •1.0E-14, ' 1.0E14 , , •' • 10E-14 „ :9.7E15 ' • 6E-13 Yes 0.81 " i nn .. BHV-1 . 9.3E-18 . 1.0E-17 3.0E-18 3.0E18 : "6.3E 4E-15 Yes 0.08 BHV-2 • 1.5E-17 :: : •7:0E-18 • 4.0E18 :' 4.0E-18 . 7.5E-18 4E-15 Yes 0.09 BHV-4 12E-17 10E-17 6.0E18 . • 6.0E18 :. 8,5E18 4E-15 Yes 0.11 BFIN/5 •:. • 9.4E-18 8.0E-18 ' 9.0E18 : 9.0E18 H'• 8.9E-18' .4E15 Yes 0.11 BHV-6 . 1.4E-17 1.OE-17 . 3.0E-18 . 3.0E-18 7.5E-1 1:I4E-15 Yes 0.09 BHV-7 1.7E-17 .1.0E17 ..- •• 5.0E-18 • 5.0E-18 9.3E-18 ••• 4E-15 . Yes 0 12 131-1V-8 •..:8.5E-18 .6i0E18 ' 3.0E-18' 3.0E-18 5.1E18: •. 4E15 Yes 0.06 , Di r e c t Ra di a tio n I Y (mrem) BHV1 BHV---2 BI-IV-4 0.00 3.60 2.60 5.20 11.40 100 Yes 11.40 2.20 0.00 1.20 0.20 3.60 100 Yes 3.60 0.70 5.40 0.90 2.90 9.90 100 Yes 9.90 •• BHV-5 1.20 5.30 0.00 4.00 10.50 100 Yes 10.50 , BHV-6 0.00 1.20 0.00 1.10 2.30 100 Yes 2.30 BHV4 0.00 0.00 1.50 0.10 1.60 100 Yes 1.60 BEN,8 0.00 0.00 0.00 0.00 0.00 100 Yes 0.00 Ra do n - 22 2 I 222Rrl (pCi/L) .:1:iBH,V2,1 0.05 0.13 0.13 0.00 0.08 0.07 No 0.05 • BHV-2 0.00 0.00 0.00 0.00 0.00 0.34 Yes 0.05 BHV-4: 0.03 0.27 0.40 0.11 0.20 0.50 Yes 0.06 BFIV:5 0.24 0.27 0.59 0.27 0.34 1.43 Yes 0.05 ' BHV-6 0.08 0.22 0.21 0.00 0.13 0.83 Yes 0.06 BHV-7 0.08 0.13 0.19 0.00 0.10 1.12 Yes 0.03 . BHV-8 0.00 0.16 0.21 0.00 0.09 0.71 Yes 3.26 Su mm a r y I Estimated Dose and Comparison to Screening Values (mrem/yr) Location Dose ALARA Goal ALARA Goal Met? Exposure Limit Compliant? - BHV-1 13.60 25 Yes 100 Yes • 'BHV-2 5.33 25 Yes 100 Yes BHV-4 13.22 25 Yes 100 Yes • - BHV-5 15.01 25 Yes 100 Yes /,..":-BHV=6 7.43 25 Yes 100 Yes , BHV-7 4.11 25 Yes 100 Yes • BHV-3 4.98 25 Yes 100 Yes Notes: Regulatory limit is 100 mrem/yr. Energy Fuels' ALARA goal is to maintain exposures below 25 mrem/yr ECLs in this analysis are based on 50 mrem/yr except radon which uses 25 mrem/yr. Table 2 ECLs are based on 50 mrem/yr. ECLs for radon were calculated using distance and wind speed from assumed stack source to BHV stations. Calculated ECLs provide inclusion of ingrowth of daughters. Annual values reflect averaging dose rates for the four quarters, except for gamma, which is the sum of four quarterly values. Reviewed by: Russ Topham Date: 2-Oct-19 Manager review: Phil Goble Date: Year Endin 30-Jun-19 PARTICULATE, RADON AND GAMMA SCREENING Quarter Ending Analysis of Annual Dose Constituent Location 30-Sep-18 31-Dec-18 31-Mar-19 30-Jun-19 Annual ECL Below ECL? mrem/yr IR a dio a c tiv e Pa r tic u la te s I T -(pcihrtLY BHV-1 : 4.0E-16 1. E 1 1 5E-15 • 8.0E17 8.7E-16» 9E14 Yes 0.48 BHV-2 1.0E- 5.0E-1 5.0E-1 4.0E17 2,9E 6 E-14 Yes 0.16 BHV,4 2.2E15 3.4E-15 3.4E45 1.0E16 2.3E-15 „ 9E-14 Yes 1.26 ' BHV-5 2.2E-15 6.0E-15 6.0E-15 2.0E-16 16E-15 " 9E-14 Yes 2.00 BHV-6 3:1E-15 7.9E-15 ::::7.E15 2.0E-16 4.8E-15 9E14 Yes 2.65 BHV-7 1.0E-15 1 .9E-15 ' 1.9E-15 8.0E-17 0-2E-15 :" 9E14 Yes 0.68 BHV-8 1::6..0E-1 6 71'.5E-15 15E15 8.0E17 " 9.2E16 9E44 Yes 0.51 m BHV-1 90E-17 : 5.0E-17: : .:•:.! 10E-17 5.0E-17 6.0E-17 - 2E44 Yes 0.15 BHV-2 2.0E-17 :i: 2.9E-17 2.0E-17 3.0E17 :- 2.3E-17 2E14 Yes 0.06 BHV-4 : 20E-16 .2.0E-16- ' „ 2.0E-16 9.0E17 1.7E16 2E:14 Yes 0.43 BHV-5 ,..! 3.0E-16 F3.0516 3.0E-16 . 1.0E-16 2.5E-16 2E14 Yes 0.63 BHV-r6 2.0E-16 2.0E-46 :: 2.0E-16 1.0E16 - - 1.8E-16 :2E-14 Yes 0A4 BHV-7 •:,„ „ 2.0E16 1.0E-16 1,0E-16 '5.0E-17 1.1E-16 : :2E-14 Yes 0.28 BFIV41- '- ' 9.0E-17 7.0E-17 '7.0E17 ' 1'.0E-16 8.3E-17 2E-14. Yes 0.21 • 2203 (pCitml..) BHVA 7.0E17 2.0E-17 2.0E-17 1.OE-16 5.3E-17 9E-13 Yes 0.00 3.0E17 1.0E-17 - D.OE17 ' ; 1.0E-16 " 3.8E-17 9E-13 Yes 0.00 •: BHV-4 1.0E46 4.0E-17 4,0E-17 8:0E-17 6:5E-17 - : 9E-13 Yes 0.00 ::BHV-5 1.0E46 "1.0E416 1,0E-16 2.0E-16 1.3E-16 9E-13 Yes 0.01 : -6 BHV : 5 .0 E-17 3:0E-17 10E-17 1,0E-16 :53E47 .' '9E-13 Yes 0.00 BHV-7 - 11.0E16 2.0E17 2.0E-17 6.0E17 5.0E-17 :!. 9E13 Yes 0.00 BHV-8 ' i 6.0E-17 " 3.0E-17 3.0E-17 2.0E-16 8.0E-17 :.:9EL13 Yes 0.00 oi/int, BHV-1 1.0E14 2,0E14 . 2.0E14 1.0E14 1.5E-14 l; i: 6E13 Yes 1.25 BHV-2 1.0E14 . : :2,0E14 :.: 20E-14 8.0E-15 :15E14 6E13 Yes 1.21 BHV-4 1.0E14 :•::: •...2OE-14 : 2.0E14 1.0E.14 1.5E-14 6E-13 Yes 1.25 BHV-5 1,0E-14 : 20E-14 2.0E-14 .2.0E-14 ''' 1.8E14 6E-13 Yes 1.46 (p , BHV-6 2.0E-14 2,0E14 ' 2.0E-14 10E14 1.8E14 6E-13 Yes 1.46 BHV-7. . 2.0E-14 1.0E-14 1,0E 4- 1.0E14 , 1.3E-14 ' 6E-13 Yes 1.04 BHV-8 E-14 1,0E-44 10E-14 10E-14 'E',:6E-13 Yes 0.83 " 232Th z .(pCi/m1.4 - 4-. • - L..BH1i4 : 1.0E17 3 OE 18 3.0E-18 4,8E-18 :'4E-15 Yes 0.06 BHV-2 7.0E-18 „ ' 40E18 i1t1 9 OE 18 . 60E18 "4E15 Yes 0.08 LII HV4 BI-IV-5 1.0E-17 6.0E-18 610E-18 4.0E-18 :i :6.5E-18 " 4E15 Yes 0.08 :::8:0E18 90E18 9 0E-18 ; 3.0E18 :: 7.3E18 4E-15 Yes 0.09 BHV-6 . 1.0E-17 : 3.0E-18 : 3.0E-18 2.0E718 :: : , . 4.5E-18 . '',1 4E-15 Yes 0.06 BI-1V-7 ! 10E17 . 5.0E18 : 5,0E-18 "3.0E18 : . 5.8E18 '' 4E-15 Yes 0.07 BHNA8 - ' 6.0E-18 3.0E-18 ::• 3.0E-18 2.0E-18 3.5E218 4E-15 Yes 0.04 Dir e c t R a dia tio n I V (mrem) BHV-1 3.60 2.60 5.20 5.00 16.40 100 Yes 16.40 SHV,2 0.00 1.20 0.20 0.30 1.70 100 Yes 1.70 BHV-4 5.40 0.90 2.90 0.30 9.50 100 Yes 9.50 BHV-5 5.30 0.00 4.00 2.20 11.50 100 Yes 11.50 BHV.:6. 1.20 0.00 1.10 0.00 2.30 100 Yes 2.30 BHV-7 0.00 1.50 0.10 0.50 2.10 100 Yes 2.10 ,:HBHV-8 0.00 0.00 0.00 0.00 0.00 100 Yes 0.00 Ra do n- 22 2 I 222Rn (pCi/L) BHV-1 0.13 0.13 0.00 0.00 0.07 0.07 Yes 0.04 ' BHV-2 0.00 0 00 0.00 0.00 0.00 0.34 Yes 0.04 HV 0.27 0 40 0.11 0.03 0.20 0.50 Yes 0.05 HV-5 0.27 0.59 0.27 0.19 0.33 1.43 Yes 0.03 BHV-6 0.22 0.21 0.00 0.00 0.11 0.83 Yes 0.04 BHV-7 0.13 0.19 0.00 0.00 0.08 1.12 Yes - 0.02 BHV-8 0.16 0.21 0.00, 0.00 0.09 0.71 Yes 3.26 Su m m a r y Estimated Dose and Comparison to Screening Values (mrem/yr) Location Dose ALARA Goal ALARA Goal Met? Exposure Limit Compliant? - low-1 18.38 25 Yes 100 Yes BkV-2 3.24 25 Yes 100 Yes BHV-4 12.58 25 Yes 100 Yes BFIV-5 15.71 25 Yes 100 Yes BHV-6 6.94 25 Yes 100 Yes BHV-7 4.20 25 Yes 100 Yes BHV-8- 4.86 25 Yes 100 Yes Notes: Regulatory limit is 100 mrem/yr. Energy Fuels' ALARA goal is to maintain exposures below 25 mrem/yr ECLs in this analysis are based on 50 mrem/yr except radon which uses 25 mrem/yr. Table 2 ECLs are based on 50 mrem/yr. ECLs for radon were calculated using distance and wind speed from assumed stack source to BHV stations. Calculated ECLs provide inclusion of ingrowth of daughters. Annual values reflect averaging dose rates for the four quarters, except for gamma, which is the sum of four quarterly values. Reviewed by: Russ Topham Date: 2-Oct-19 Manager review: Phil Goble V Date: