DRC-2021-020061 - 0901a06880fb6399

DKc-204-ozoo6"
UTAH DIVISION OF WASTE 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, 2021 through June 30, 2021
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 21, 2021
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 1 st or
July 1st? (10CFR40.65(a)(1))
Yes Z No n
Comments:
The Semi-Annual Effluent Monitoring Report for the lst half of 2021 for the White Mesa Mill was
received on August 27, 2021 (document dated August 23, 2021).
Page 1 of 8
2. Were the stack samples analyzed for U-nat, 230Th, 226Ra and 210Pb? (NRC Reg Guide 4.14) and Th-
228, Th-232 and Ra-228 (L.C. 11.9)
Yes Z No El
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 and 210Pb? (NRC Reg
Guide 4.14) and Th-232 (L.C. 11.9)
Yes Z No El
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 § 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
4. Were the site boundary effluent air sample results within applicable limits for U-nat, 230Th, 226Ra and 210pb? (10CFR20 Table II of Appendix B)
10CFR20 Table II of Appendix B, ECL's:
U-nat 9.0E-14 pCi/m1 in air 230Th 2 0E-14 pCi/m1 in air 226Ra 9.3E-13 p,Ci/m1 in air 210pb 6.0E-13 pCi/m1 in air
Yes El No ri
Comments:
5. Did the results of the effluent monitoring for this reporting period achieve the site's ALARA
objective of 25% of the ECL's? (2007 License Renewal Application Vol. 1 Section 6.5; 10CFR20 Table
II of Appendix B)
10CFR20 Table II of Appendix B, ECL's:
U-nat 9.0E-14 µCi/m1 in air.....25% =- 2.25E-14 pCi/m1 in air 230Th 2.0E-14 pCi/m1 in air.....25% = 5.15E-15 µCi/m1 in air 226Ra 9.3E-13 pCi/m1 in air.....25% = 2.33E-13 pCi/m1 in air 210pb 6 0E-13 pCi/m1 in air.....25% = 1.50E-13 p,Ci/m1 in air
Yes EI 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.
Page 3 of 8
6. Were Gamma Measurements (Minus Background) Collected at each Monitoring Station?
Yes Z No 0
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 111 N/A El
Comments:
Soil sampling occurred during the first half of the year.
8. Were vegetation samples analyzed for 226Ra and 210Pb? (NRC Reg Guide 4.14) and U-Nat and Th-
232 (LC??)
Yes Z No El
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 El No 0
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 222? (NRC Reg Guide 4.14)
Yes z No 0
Comments:
11. Were the 222Rn results within the calculated ECL's for the yearly average results for the last four
quarters?
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.
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 21°Pb?
(NRC Reg Guide 4.14)
10CFR20 Table II of Appendix B, ECL's:
U-nat .9.0E-14 pEi/m1 10% = 9.0E-15 µCi/ml 230Th 2.0E-14 µCi/m1 10% = 2.0E-15 µCi/ml 226Ra 9.3E-13 µCi/ml 10% = 9.3E-14 µCi/ml 210pb 6.0E-13 IACi/m1 10% = 6.0E-14 µCi/ml
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 210Pb? (NRC Reg Guide
4.14)
NRC Regulatory Guide 4.14 Section 5 LLD values (in air):
U-nat 1 0E-16 pEi/m1 230Th 1 0E-16 µCi/ml 226Ra 1 0E-16 µCi/ml 210pb 2 0E-15 µCi/m1
Yes Z No Ei
Comments:
The LLDs documented in the analytical report are: U-nat 1E-16, Th-230 1E-16; Ra-226 1E-16 ,&
Pb-210 2E-15
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 0E-7 uCi/g 226Ra 2 0E-7 tiCi/g 210pb 2 0E-7 uCi/g
Yes Z No [1] N/A El
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 2.0E-7 uCi/kg 226Ra 5 0E-8 uCi/kg 210pb 1 0E-6 uCi/kg
Yes Z No Z
Comments:
Page 7 of 8
Reviewed By: Phil Goble
(Print Name) (Signature)
Russ Topham Prepared By:
(Print Name)
fV/ze
Date)
. /
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 222?
NRC Regulatory Guide 4.14 Section 5 LLD values for radon: 222Rn 2 0E-1° IICi/m1 (0.2pCi/L)
Yes [Z] No
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
210pb
Yes n No E
Comments:
Yellowcake was not produced during the reporting period.
Page 8 of 8
Year Endin 30-Jun-21
PARTICULATE, RADON AND GAMMA SCREENING
Quarter Ending Analysis of Annual Dose
Constituent Location 30-Sep-20 31-Dec-20 31-Mar-21 30-Jun-21 Annual ECL Below ECL? mrem/yr
a) (0
(0
(0 ,..• (0
(0 ce
,i
4.•:',,,,,,
,NA yJjjj
JIYfil

IP 1 : !

: ,td :..•:,wnr
BHV-1 8.0E-16i 1.0E-16 • 20E-16 7.0E-17 2.9F-16 9E-14 Yes 0.16
BHV-2 • 3.0E-16 ! 4.0E-17 1.0E-16 3.0E-17 1 .2E-16 9E-14 Yes 0.07
BHV-4 • 2.1E-15 i 1.4E-15 6.0E-16 5.0E-17 1:0E-1'5 9E-14, Yes 0.58
BHV-5
BHV-6
2.8E-15. 1.8E-15 7.0E-16 2.0E-16 .1.4E-15 9E-14 Yes 0.76
2.2E-15' 2.2E-15 6.0E-16 1.0E-16 13E15 9E-14 Yes 0.71
BHV-7 11E-15: 5.0E-16 2.0E-16 3.0E-16 5.5E-16 9E14 Yes 0.31
BHV-8
BHV-1

1.5E-15; 2.0E-16

8.0E-17 4.0E-17
3.0E-16
2.0E-17
9.0E-17
7.0E-17
5.2E-16
5.3E-17
9E-14
2E-14
Yes 0.29
Yes 0.13
BHV-2 5.0E-17 2.0E-17 1.0E-17 3.0E-17 2.8E-17 ..„..„,,, 2E-14 Yes 0.07
BHV-4 2.0E-16 2.0E-16 6.0E-17 7.0E-17 1.3E-16 2E-14 Yes 0.33
BHV-5 4.0E-16 8.0E-16 1.0E-16 2.0E-16 3.8E-16 2E-14' Yes 0.94
BHV-6
BHV-7
5.0E-16 1.0E-16 9.0E-17 9.0E-17 2.0E-16 ,.• 2E-14 Yes 0.49
2.0E-16, 1.0E16 4.0E-17 2.0E-16 1.4E-16 2E-14 Yes 0.34
BHV-8 1.0E-1& 4.0E17 •3.0E-17 1.0E-16 6.8E-17 2E-14 Yes 0.17
1 :40,* 1 ' .
.1".7'-- BHV-1 7.0E-17, 6.0E-17 4.0E-17 2.0E-16 9.3E-17 9E-f 3 Yes 0.01
BHV-2 8.0E-17' 3.0E-17 3.0E-17 1.0E-16 6.0E-17 9E-13 Yes 0.00
BHV-4 1.0E-16! 1.0E-16 8.0E-17 2.0E-16 1.2E-16 9E13 Yes 0.01
Or-7N BHV-5 5.0E-16. 2.0E-16 2.0E-16 6.0E-16 3.8E-16 9E13 Yes 0.02
BHV-6 1.0E-16' 9.0E-17 1.0E-16 2.0E-16 1.2E-16 9E-13 Yes 0.01
BHV-7 1.0E-15 . - 8.0E-17 8.0E-16 5.0E-16 9E-13 Yes 0.03
BHV-8

8.0E-16 5.0E-17

8.0E-15 1.0E-14
4.0E-17
2.0E-147
5.0E-16
1.0E-14
3.5E-16
1.2E-14
9E-13
6E-13
Yes 0.02 [ r
0
r,
'
BHV-1 Yes 1.00
BHV-2 6.0E-15 1.0E-14 1.0E-14 1.0E-14 9.0E-15 6E-13- Yes 0.75
BHV-4 7.0E-15 1.0E-14 2.0E-14 1.0E-14 1.2E-14 6E-la Yes 0.98
„ BHV-5 6.0E-15! 1.0E-14 2.0E-14 1.0E-14 1.2E-14 6E-13 Yes 0.96
BHV-6 4.2E-14 1.0E-14 2.0E-14 1.0E-14 2.1E-14 6E-13 Yes 1.71
a BHV-7 1.0E-14 7.0E-15 2.0E-14 1.0E-14 1.2E-14 6E-13 Yes 0.98
BHV-8 7.0E-15 _ 1.0E-14
7.0E-18
2.1E-14
5.0E-18
1.0E-14
1.0E-17
1.2E-14
6.3E-18
6E-13
4E-15
Yes
Yes
1.00
0.08 h
-- kpihjgr
BHV-1 3.0E-18
BHV-2 7.0E-18 1.0E-17 9.0E-18 1.0E-17 9.0E-18 ':v 4E115 Yes 0.11
BHV-4 5.0E-18' 9.0E-18 5.0E-18 8.0E-18 6.8E-18 4E-15 Yes 0.08
FA,7 BHV-5 2.0E-17. 8.0E-18 5.0E-18 1.0E-17 1.1E-17 4 4E-15 Yes 0.13
BHV-6 2.0E-17 6.0E-18 5.0E-18 1.0E-17 1.0E-17 4E-15 Yes 0.13
BHV-7 3.0E-18 8.0E-18 5.0E118 1.0E-17 6.5E-18 4E15 Yes 0.08
BHV-8 7.0E-18 4.0E-18 4.0E-18 1.0E-17 6.3E718 4E46 Yes 0.08
I D
i
r
e
c
t Ra
dia
tio
n

I
V (mrem)
BHV-1 2.30 5.30 0.00 0.30 7.90 100 Yes 7.90
BHV-2 0.00 2.40 0.00 0 00 2.40 100 Yes 2.40
BHV-4 0.00 0.00 0.00 0.60 0.60 100 Yes 0.60
ÍBHVi.5 3.60 4.80 2.60 4.90 15.90 100 Yes 15.90
BHV-6 0.00 1.00 2.20 0.00 3.20 100 Yes 3.20
BHV-7 0.00 1.00 0.00 0.00 1.00 100 Yes 1.00
BHV-8 0.00 1.80 0.00 0.00 1.80 100 Yes 1.80
I
Ra
do
n-
22
2

I

222Rn
(pCi/L)
BHV-1 0.03 0.05 0.02 0.05 0.04 0.07 Yes 0.06
BHV-2 0.00 0.02 0.00 0.03 0.01 0.34 Yes 0.04
BHV-4 0.11 0.24 0.16 0.24 0.19 0.50 Yes 0.07
BI-IV-5 0.17 0.59 0.32 0.24 0.33 1.43 Yes 0.06
BHV-6 0.17 0.24 0.05 0.13 0.15 0.83 Yes 0.04
BHV-7 0.11 0.18 0.05 0.08 0.11 1.12 Yes 0.04
BHV-8 0.06 0.21 0.10 0.03 0.10 0.71 Yes 3.52
[
Su
m
r
n
a
ry

I
E stimated
Dose
and
Comparison
to
Screening
Values
(mrem/yr)
Location Dose
ALARA
Goal
ALARA
Goal Met?
Exposure
Limit Compliant?
BHV-1 9.33 25 Yes 100 Yes
BHV-2 3.44 25 Yes 100 Yes
BHV-4 2.65 25 Yes 100 Yes
BHV-5 18.78 25 Yes 100 Yes
BHV-6 6.28 25 Yes 100 Yes
BHV-7 2.77 25 Yes 100 Yes
BHV-8 6.88 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 ta6Manager review. Phil Goble
Date: /0 iv' 7 /2.•
Date: ot/

Year Ending 31-Mar-21
PARTICULATE, RADON AND GAMMA SCREENING
Quarter Ending Analysis of Annual Dose
Constituent Location 30-Jun-20 30-Sep-20 31-Dec-20 31-Mar-21 Annual ECL Below ECL? mrem/yr
v,
3
-E ca
qz.. 0 0 0 Ts cu
BHV-1 8.0E-16 8.0E-16 1.0E-16 2.0&16 4:8E-16 9E-141 ' Yes 0.26 BHV-2 3.0E-16 3.0E-16 4.0E-17 1.0E-16 1.9E-16 9E-14 Yes 0.10
N'AT-'1:"
Wellt- Nr" A ,
BHV-4 2.1E-15 2.1E-15 1.4E-15 6.0E-16 1.6E-15 9E14 Yes 0.86 BHV-5 •2.8E-15 2.8E-15 1.8E-15 7.0E-16 2.0E-15 • 9E-14 Yes 1.13
BHV-6 2.2E-15 2.2E-15 2.2E-15 6.0E-16 1.8E-15 9E-14 Yes 1.00
BHV-7 1.2E-15 1.2E-15 5.0E-16 2.0E-16 7.8E-16 9E-14 Yes 0.43 BHV-8 - 1.5E-15 . _ 1.5E-15 _. . 2.0E-16 3.0E-16
2.0E17
8.8E-16 ... 5.5E..17
9E-14
2E-14
Yes 0.49
) ( ,
BHV-1 8.0E-17 8.0E-17 4.0E-17 Yes 0.14 BHV-2 5.0E-17 5.0E-17 2.0E-17 1.0E-17 3.3E-17 2E-141 Yes 0.08
BHV-4 2.0E-16 2.0E-16 2.0E-16 6.0E-17 1.7E-16 2E-14 Yes 0.41
BHV-5 4.0E-16 4.0E-16 8.0E-16 1.0E-16 4.3E-16 2E-14 Yes 1.06 BHV-6 5.0E-16 5.0E-16 1.0E-16 9.0E-17 3.0E-16 2E-14 Yes 0.74
76 , ".1,- A 6.,
NIACii
210pb
BHV-7 2.0E-16 2.0E-16 1.0E-16 4.0E-17 1.4E-16 2E-14 Yes 0.34
BHV-8 1.0E-16 1.0E-16 4.0E-17
6.0E-17
3.0E-17
4.0E-17
6.8E-17
6.0E-17
2E-14
9E-13
Yes
Yes
0.17
0.00 BHV-1 7.0E-17 7.0E-17
BHV-2 8.0E-17 8.0E-17 3.0E-17 3.0E-17 5.5E-17 9E-13 Yes 0.00
BHV-4 1.0E-16 1.0E-16 1.0E-16 8.0E-17 9.5E-17 9E-13 Yes 0.01 BHV-5 5.0E-16 5.0E-16 2.0E-16 2.0E-16 3.5E-16 9E-13' Yes 0.02
BHV-6 1.0E-16 1.0E-16 9.0E-17 1.0E-16 9.8E-17 9E-13 Yes 0.01
BHV-7 1.0E-15 1.0E-15 1.0E-16 8.0E-17 5.5E-16 9E-13 Yes 0.03
BHV-8 8.0E-16 8.0E-16
8.0E-15
5.0E-17
1.0E-14
4.0E-17
2.0E-14
4 2E-16
1.2E-14
9E-13
6E-13
Yes 0.02
BHV-1 8.0E-15 Yes - 0.96
BHV-2 6.0E-15 6.0E-15 1.0E-14 1.0E-14 8.0E-15 6E-13 Yes 0.67
BHV-4 7.0E-15 7.0E-15 1.0E-14 2.0E-14 1.1E-14 6E-13 Yes 0.92
l.a.
1
BHV-5 6.0E-15 6.0E-15 1.0E-14 2.0E-14 1.1E-14 6E-13 Yes 0.88
BHV-6 4.2E-14 4.2E-14 1.0E-14 2.0E-14 2.9E-14 6E-13 Yes 2.38
BHV-7 1.0E-14 1.0E-14 7.0E-15 2.0E-14 1.2E-14 6E-13 Yes 0.98
BHV-8 7.0E-15 7.0E-15
- 3.0E-18
1.0E-14
7.0E-18
2.1E-14
• 5.0E-18
1.1E-14
4.5E-18
6E-13
4E15'
Yes 0.94
441CiATIL • , Al
•
BHV-1 3.0E-18 Yes 0.06
BHV-2 7.0E-18 7.0E-18 1.0E-17 9.0E-18 8.3E-18 4E-15 Yes 0.10
BHV-4 5.0E-18 5.0E-18 9.0E-18 5.0E-18 6.0E-18 4E-15 Yes 0.08 4- BHV-5 2.0E-17 2.0E-17 8.0E-18 5.0E-18 1.3E-17 4E-15 Yes 0.17
BHV-6 2.0E-17 2.0E-17 6.0E-18 5.0E-18 1.3E-17 4E-15 Yes 0.16
BHV-7 3.0E-18 3.0E-18j 8.0E-18 5.0E-18 "4:8E-18 4E-15 Yes 0.06
BHV-8 • 7.0E718 7.0E-18 4.0E-18 4.0E7-18 . 5.5E-18 4E-15 Yes 0.07,
I D
i
r
e
c
t R
a
di
a
tio
n

I

1, (mrem)
BHV-1 4.50 2.30 5.30 0.00 12.10 100 Yes 12.10
BHV-2 0.00 0.00 2.40 0.00 2.40 100 Yes 2.40
BHV-4 0.00 0.00 0.00 0.00 0.00 100 Yes 0.00
tI BHV-5 2.50 3.60 4.80 2.60 13.50 100 Yes 13.50 r7-,, r :& BHV-6 0.00 0.00 1.00 2.20 3.20 100 Yes 3.20
BHV-7 0.00 0.00 1.00 0.00 1.00 100 Yes 1.00
BHV-8 0.00 0.00 1.80 0.00 1.80 100 Yes 1.80
I
Ra
do
n
-
222

I
222Rn
(pCi/L)
• BHV-1 0.13 0.03 0.05 0.02 0.06 0.07 Yes 0.05
BHV-2 0.00 0.00 0.02 0.00 0.01 0.34 Yes 0.04
BHV-t
BHV-5
0.21 0.11 0.24 0.16 0.18 0.50 Yes 0.08
0.37 0.17 0.59 0.32 0.36 1.43 Yes 0.08
BHV-6 0.08 0.17 0.24 0.05 0.14 0.83 Yes 0.03
BHV-7 0.08 0.11 0.18 0.05 0.11 1.12 Yes 0.03
BHV-8 0.00 0.06 0.21 0.10 0.09 0.71 Yes 3.26
I
Su
mm
a
ry

I
Estimated
Dose
an d
Comparison
to
Screening
Values
(mrem/yr)
Location Dose
ALARA
Goal
ALARA
Goal Met?
Exposure
Limit Compliant?
8HV-1 13.57 25 Yes 100 Yes
BHV-2 3.39 25 Yes 100 Yes
BHV-4 2.35 25 Yes 100 Yes
BHV-5 16.83 25 Yes 100 Yes
BHV-6 7.51 25 Yes 100 Yes
BHV-7 2.87 25 Yes 100 Yes t' BHV-8 6.74 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:
Manager review: Phil Goble f Date.