ML13130A140

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in Situ Object Counting System (Isocs) as Applied to Scan Requirements in Support of Final Status Survey at Hbpp
ML13130A140
Person / Time
Site: Humboldt Bay
Issue date: 09/26/2012
From: Randall D
Pacific Gas & Electric Co
To:
NRC/FSME
References
HBL-13-008
Download: ML13130A140 (48)
v • d • e


Text

Enclosure 5 PG&E Letter HBL-13-008 In Situ Object Counting System (ISOCS) as Applied to Scan Requirements in Support of Final Status Survey at HBPP September 26, 2012

Pacific Gas and Electric Company' In Situ Object Counting System TM (ISOCS) as Applied to Scan Requirements in Support of the Final Status Survey at HBPP September, 26, 2012 Dale Randall Reviewed By: MVL A- r Date: -4 I, ZA Approved By: Date: 1

1.0 SCOPE This TBD is intended to cover the use of the Canberra ISOCS detector system as a scanning instrument for Final Status Surveys.

2.0 DISCUSSION The Canberra characterized High Purity Germanium (HPGe) detector will be used in conjunction with the Canberra GenieTM softvare suite to achieve Final Status Survey (FSS) scans of building surfaces and land areas and possibly other media as deemed appropriate (e.g. piping systems). The ISOCS scanning technique achieves scan coverage over a defined area to set a-priori detection limits. These detection limits must be capable of detecting the investigation level to facilitate follow-up investigations where required

System Description

Two ISOCS-characterized P-type HPGc detectors, manufactured by Canberra Industries, have been procured. As the project progresses, other ISOCS detectors (e.g. reverse electrode coaxial) may be employed. The key factor regarding the use of other ISOCS characterized detectors is that specific efficiency calibrations will be developed and evaluated to account for each detector's unique characteristics.

The HPGe detector is mounted on a bracket designed to hold. the detector l c*yostat assembly and associated collimators. This bracket may be mounted in a cage-like firame. This firame permits the detector to be oriented (pointed) over a full range friom a horizontal to vertical orientation while being positioned above the surface being evaluated.

The InSpector (MCA) unit that drives the signal chain and the laptop computer that runs the acquisition softvare (Genie-2000) are mounted either in the frame or on a wheeled cart. These components may be battery powered. Back-up power supplies (e.g. inverter) may be used to support the duty cycle. A wireless network may also be installed so that the laptop computers used to run the systems can be controlled from remote laptop, eliminating the need for a direct cable connection between the operator's station and the ISOCS unit LTP Chapter 5 Performance Criteria In the performance of required survey unit measurements, levels of radioactivity may be identified that warrant investigation. Depending on the results of the investigation, the survey unit may require no action, remediation, and/or reclassification and resurvey. In order to satisfy the requirements of the HBPP LTP (REF 1), the scan sensitivity and coverage must be adequate to meet the dual specifications for coverage and investigation level as presented in Table I and Table 2.

2 to 47

Table 1 Scan Survey Coverage Requirements I Class I Class 2 Class I Scan Coverage 100% 10-100 %* IJudgmental 1-10%)

  • For Class 2 Survey Units, t(ie amount of scan coverage will be proportional to (tie potential for finding areas of' elevated activity or areas close to the release criterion in accordance with MARSSIM Section 5.5.3. Accordingly, HBPP will use historical infommation and the results of individual measurements collected during characterization to correlate this activity potential to scan coverage levels.

Table 2 Investigation Levels Classification Scan Investigation Levcls Direct Investigation Levels

>DCGL.:K 1 or->DCGL,, and > a statistical parameter-based Class I > DCGLF.Mc Value

>DCGL,. or >MDCv-*Av if Class 2 D is greater than DCGLIjj > DCGLw Class 3 Detectable over Background > 0.5 DCGLw Traditional Scan methodologies Traditional galnma scan surveys have been performed with handheld instruments such as Nal(TI) scintillation detectors for gamma in potentially contaminated media or gas flow proportional probes when alpha/beta detection on surfaces is desired.

Technicians will respond to all instrument indications of elevated activity while surveying. Upon receiving an indication, the technician will stop and resurvey the last square meter of area surveyed to verify the increase. Technicians are cautioned, in training, about the importance of the verification survey and are given specific direction iin the procedure as to survey extent and scan speed. If the indication is verified, the technician will mark the area with a flag or other appropriate means. Each area marked will be addressed in an investigation survey instruction prepared for the survey unit. The instruction will specify the required actions, such as a re-scan of the area, direct measurements, and collection of a soil sample (for land surveys). Each investigation will be evaluated and reported in the survey area report. (Investigation levels are shown in Table 2.)

With respect to Class I Survey Units, surveillance for elevated activity is performed via scan surveys using hand-held field instruments. Acceptance criteria (i.e. DCGLE,%tc) is derived by multiplying the DCGLw by the area factor associated with that area bounded by the grid used to locate soil samples. Occasionally, due to either background radioactivity or the size of the sample location grid, the detection sensitivity for these hand-held instruments exceeds the DCGLEMC. In such instances, the survey grid is reduced so that area factors yielding higher DCGLEMC values can be used.

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ISOCS Scan methodologies For the ISOCS scan method, the primary assumption made is that a potential one-square-meter of elevated radioactivity exists at the edge of the area being evaluated by a single in-situ measurement.

To account for detection (i.e. efficiency) radiontclide-specific investigation levels are developed. Since the investigation levels approximate the DCGLw, assay results below investigation level(s) satisfy both (he DCGLw and DCGLE*MC criteria.

The ability of ISOCS to perform radionuclide identification is also beneficial where influences from background radioactivity (e.g. iSFSI) impede survey efforts. Count times can be tailored to achieve required detection sensitivities and the detector can be collimated to minimize the influence firom sources outside the detector's field of viewv.

Set up The ISOCS is most commonly deployed on its cart, a tripod or a crane to accommodate the physical requirements of various measurements. Power may be supplied by battery, AC line or generator. The decision regarding the selection of collimator configuration is determined by the engineer. In some cases it may be desirable to use a 180 degree collimator, taking advantage of exposing more of the detector's sensitive volume Whenever background sources are at an insignificant level.

Data collection to support FSS activities will be administered by a specific Survey Plan.

Survey Plans may include an index of measurement locations with associated spectrum filenames to ensure that all the required measurements are made and results appropriately managed. Personnelspecifically trained to operate the system will perform data collection activities.

Data collection activities will address environmental conditions that may impact soil moisture content. Logs shall be maintained so as to provide a mechanism to annotate such conditions to ensure that efficiency calibration files address the in-situ condition(s). In extreme cases (e.g. standing water, etc.) specific conditions will be addressed to ensure that analysis results reflect the conditions. As previously discussed with respect to water, when unique environmental conditions exist that may impact analysis results, conservative compensatory factors will be applied to the analysis of the data.

Efficiency Calibration The central feature of the portable ISOCS technology is to support in-situ gamma spectroscopy via the application of mathematically derived efficiency calibrations. Due to the nature of the environment and surfaces being evaluated (assayed), input parameters for the ISOCS efficiency calibrations will be reviewed on a case-by-case basis to ensure the applicability of the resultant efficiency. Material densities applied 4 to 47

to efficiency calibrations will be documented. Iln practice, a single efficiency calibration rile may be applied to the majority of tile measurements.

The geometry most generally employed will be a circular plane assuming uniformly distributed activity. Efficiency calibrations will address a depth of 15 cm for soil and a depth up to 5 cm for concrete surfaces to account for activity embedded in cracks, etc.

Other geometries (e.g. exponential circular plane, rectangular plane, etc.) will be applied if warranted by the physical attributes of the area or surface being evaluated.

Efficiency calibrations are developed by radiological engineers who have received training with respect to the ISOCS software. Efficiency calibrations will be documented in accordance with the 1-BPP QAPP.

Attenuation by standing water w\,ill need to be modeled into the shot and carefuilly verified so as to not understate the depth. Experience has shown that it becomes difficult to meet detection limits with more than two inches of water in a scan shot. If there is evidence of standing water (i.e., a water sheen is visible on the soil media) then an appropriately thick layerof water attenuator will be added to the model.

Designing coverage It is frequently desirable or required to ensure 100% scan coverage of a survey unit. This may be achieved through the use of a triangular grid pattern with positions determined using the Visual Sample Plan (VSP) software. For the purposes of this discussion, it is assumed that the 90 degree collimators are installed and that the detector face is orientated downward and is lifted to the desired height, h above the horizontal plane. The field of view of the detector is a circle of radius h. By geometric construction, the maximum horizontal distance L, between the scan shots becomes:

Equation I L = N'-3* h

Where, L is the triangular grid spacing; and h is the vertical height of the detector To use VSP to design a triangular grid pattern for a given survey utnit, we will use a random start point. The current VSP software version (v. 6.2d) requires that tile number of desired samples (scan shots) N, be used to establish a triangular grid with a random start point of appropriate grid spacing. This input may be determined by using the familiar triangular grid equation from the MARSSIM:

5 to 47

Equation 2 L= .6A O.866N Or, stated more purely; Equation 3 L =A t Thus Using Equations 2 and 3:

V-3 -~N It= ItIN

Thus,

'3112 A A..

N*J23 Solving for N, Equation 4 A

N= 3112

  • 3-T1~2 It is recommended that N+I be input into the VSP run to ensure a slight additional overlap for conservative margin. As shown in Figures 1 and 2, once the triangular grid is constructed it will be necessary to verify that 100% of the area is covered by plotting the scan measurement locations and the field of view for each measurement in a drafting program such as AutoCAD. Additional scan shots on the periphery of the survey unit may be readily added by plotting additional measurement locations using the sample 6 to 47

points along the triangular grid. The manually added scan shot locations are shown in redl.

Figure 1- Using VSP for plotting ISOCS scan locations Figure 2- An array of 21n high ISOCS scans used to achieve 100% coverage d,

2M 7 to 47

HBPP Required Detection Levels Class I Survey Units As noted earlier, the primary assumption made is that a potential one-square-meter of elevated radioactivity exists at the edge of the area being evaluated by a single in-situ measurement. In order to determine the required scan MDC one needs to determine the DCGLr.Nc for this hypothetical case. Tables 3 and 4 present the DCGLErtc scan requirement for Class I Areas for the primary nuclides of concern Cs-137 and Co-60.

Table 3 Soil Values Table 4 Surface Values Class 2 Survey Units Since the investigation Level for Class 2 Survey units is. given from Table 2 as:

>DCGLw or >AfDCscgjy if AfDCsc-A~y is greater than DCGLW In order to meet this requirement we will set the detection limits sLICh that:

>DCGLI 1 , in a 1 in2 area at the edge of the field of view may be detected.

Class 3 Survey Units Since the investigation Level for Class 3 Survey units is given from Table 2 as:

Detectable over background.

This requirement is met by investigating any scan that positively detects activity in excess of the site assessed surface soil background of 0.4 pCi/g Cs- 137.

Attachment I provides a site specific ISOCS rin that demonstrates the nominal scan detection limits are met for soils in a 600 second count.

8 to 47

3.0 LIMITATIONS The use of the in-situ techniques should be limited to characterized HPGe detectors utilizing appropriate geometries and will be used in conjunction with the Canberra GenieTM software suite. All operations should be conducted in accordance with applicable site procedures additionally; the following condition must be satisfied:

The geometries must be reviewed by a Subject Matter Expert (SME) to ensure they are correctly developed and accurate or conservative approximations of the mledia being measured.

4.0 CONCLUSION

Caution needs to be used in the application of geometries for ISOCS scanning.

Careful verification that the environmental conditions and geometric arrangement are appropriate to the detector geometry is pivotal to ensuring the accuracy of the results.

Field conditions may also significantly influence the practical applicability of the ISOCS as a field instrument. Experience has shown that the impact of attenuation from standing water may be particularly problematic in achieving the required detection sensitivity. Consequently, it is recommended that standing water be avoided to the extent practical and sufficient counting times are planned for where it is impractical to eliminate.

The ISOCS methodology presented has been demonstrated as an acceptable means for achieving survey scan objectives; provided that proper care is taken to ensure that the results are valid.

8.0 REFERENCES

1. NUREG- 1575, MARSSIM "Multi-Agency Radiation Site Survey and Investigation Manual", Rev 1, August, 2000.
2. I-IBPP License Termination Plan DRAFT (May 2012)
3. ENG-HB-003 "Humboldt Bay Soil Derived Concentration Guideline Levels",

Rev 0, 2-29-12

4. ENG-HB-004 "Humboldt Bay Building Surface Derived Concentration Guideline Levels", Rev 0, 2-29-12.

9 to 47

5. ENG-HB-005 "Area Factors For Use with Humboldt Bay Soil DCGLs", Rev 0, 3-02-12.
6. ENG-HB-006 "Area Factors for Use With Humboldt Bay Building Surface DCGLs", Rev 0, 3-02-12.
7. C&RP B-9 Vol. 8, Rev 0, "OPERATION OF THE GENIE-2000 GAMMA SPECTROSCOPY SYSTEM" 10 to 47

Attachment I Demonstration of Achieving Required Detection Limits for Soils in a 10 minute Count Interval 11 to 47

ISOCS Summary for Soils Case Modeled Case A Case B Case C MDA (pCi/g) MDA (pCi/g) MDA (pCi/g) Cs-Time (sec) Cs-137 Cs-137 137 600 0.300 3.13 2.87 Case Modeled Case A Case B Case C MDA (pCi/g) MDA (pCi/g) MDA (pCi/g) Co-Time (sec) Co-60 Co-60 60 600 0.183 1.89 1.70 3

Case A Entire field of view @ 2m height 450 collimator 1.6 g/cm 3

Case B 1m2 circle edge field of view @ 2m height 450 collimator 1.6 g/cm 3

Case C mi 2 circle edge field of view @ 2m height 450 collimator 1.6 g/cm 12 to 47

Geometry Composer Report A

CANBERRA

  • Dpate: Wednesday, August 17, 2011 - 09:58:45

Description:

2m Soil, Sm Collimator (a,2 po FOv)

Comment: 2m Soil, Sm Collimator File Name: C:\GENIE2Ks\G aEOMETRY\In-Sltu\CIRcULARPLANE,2m Si Sm Colllmator.geo Software: ISOCS Template: CRCULARPLANE, Version: (default)

Detectors 3920 Collimator: 25mm-90d old (oMliSOCS 25mm side 90deg collinatlon [large hole collimator])

Environments Temperature - 60 OF, Pressure 760 mm Hg, Relative Humidity = 80%

Integration: Convergence - 1.00%, MDRPN 24 (16), CRPN = 24 (16)

Dimensions (cm)

I SideWags 0 400 ' ~~~_ _

2 Laws,1 , i. & '? ' s dirt2 1.6 10 3 L"We2 0__

4_ Laeor3 0 5 Layer4 0 ~ ~ ~ .'; ~;~ ___

6 Laeff 5 0 f ____

7 Laye6 0 ____

8 ~Lawtr7 0 ~

9 aeS0 < Y--

ý~

10 ' ~ "" ' Y"eP0 _ _

ii a~10 0 ___

13 Abuoeber2 174 sourto*e- scwo 200 1 0 0 0 *0 List of energies for efficiency curve generation 10.0 20.0 30.0 45.0 8.0 59.5 60.0 61.0 70.0 80.0 100.0 150.0 200.0 300.0 400.0 600.0 660.0 661.7 662.0 663.0 800.0 1000.0 1172.0 1173.2 1174.0 1331.0 1332.5 1333.0 1500.0 2500.0 1.1 wil 4hldtss,*

ri coPY% P090 fA 47

Geometry Composer Report A CANBERRA Date: Wednesday, August 17, 2011 - 09:58:45

(" escription: 2m Soil, Sm Collimator Comment: 2m Sol#, Sm Collimator File Name: C:\GENIE2KVsocs\data\GEOMETRY\Jn-Sltu\CIRCULARPLANE\2m Software: Soll, Sm Colifmator.geo ISOCS Template: CIRCULARPLANE, Version: (default)

A

  • V. 4 Palr4i.0%

I

ISOCS/LAflSOCS RE~SULTS ISOCS/LabSOCS File: C: \GENIE2K\isocs\data\GEOMETRY\In-Situ\CIRCULARPLANE\2m Soil ISOCS/LabSOCS Time: 08/17/11 09:37:46 Genie Cal File: C:\GENIE2K\CALFILES\2mSoilSm .CAL G-- ie Oal Time: 08/17/11 10:04:05

'L plate: CIRCULAR PLANE Geom

Description:

2m Soil Sm ShId Coimnen t: ISOCS:UNITS=ACT/G 2MSOIL, SM COLLIMATOR Detector: 3920 Collimator: 25MM-90D OLD Convergence: 1.00 %

Area [Sq Meters]: 1.2566e+001 (C)

Mass [Grams]: 3.0159e+006 (C)

Length [Meters]: not used (C) = Value calculated by ISOCS (U) = Value modified by user Energy Efficiency %Uncertainty %Convergence Final # of Voxels

( X Mass) 10.00 4.98337e-020 20.0 0.765830 27220 20.00 1. 62725e-015 20.0 0. 022777 872925 30.00 2. 82366e-006 20.0 -0.086117 218225 45.00 5.68310e-002 15.0 0. 228611 436465 58.00 8. 40232e-001 10.0 -0.242875 6775 59.54 1. 03257e+000 10.0 -0.298996 6775 60.00 1. 09605e+000 10.0 -0.303913 6775 61.00 1 .20881e+000 10.0 -0. 333334 6775 70.00 2.50849e+000 10.0 -0.464690 6775 80.00 4.26787e+000 10.0 -0.556374 6775 100.00 6.95166e+000 10.0 -0.516969 6775 50.00 9.65846e+000 10.0 -0.548414 6775

-00.00 9.86728e+000 8.0 -0. 530546 6775 300.00 8. 84319e+000 8.0 -0.350321 6775 400.00 7. 88400e+000 8.0 -0.213358 6775 600'. 00 6. 88428e+000 6.0 -0.091989 6775 660.00 6. 69235e+000 6.0 -0.073433 6775 661.65 6. 68068e+000 6.0 -0.071660 6775 662.00 6.69778e+000 6.0 -0.071590 6775 663.00 6.67896e+000 6.0 -0.071649 6775 800.00 6.31889e+000 6.0 -0.066937 6775 1000.00 5.91949e+000 4.0 -0.071232 6775 1172.00 5.66953e+000 4.0 -0.064342 6775 1173.22 5.66651e+000 4.0 -0.062582 6775 1174.00 5.66395e+000 4.0 -0.063173 6775 1331.00 5.46725e+000 4.0 -0.046045 6775 L332.49 5.46833e+000 4.0 -0.041743 6775

[333.00 5.46025e+000 4.0 -0.041392 6775 1500.00 5.19425e+000 4.0 -0.042582 6775

?500.00 3.99988e+000 4.0 -0.044001 6775 15 to 47

Interpolated Efllcliency Calibration Curve I-0 ,,measured ; Caculated I

Energy (keV)

Dalasource: SN 3920 16 to 47

(, hItorpolatod Efficienicy Calibration Curve (3 Measured Catculated 10-m 1

0.1 0.01 0.001 0.0001 le-005 10-006 le-007 10-008 le-OQO I e-01 0 le-Oll le-012-le-013-Ie-014-le-015 -

1e-010-le-017ý le-0181 ie-iuJ Ie-020 --

10 100 1000 10000 Enorgy (kWV)

Datasource: SN..3920 17 to 47

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    • *
  • G A M M A S P E C T R U M A N.A L Y S I S Detector SN_3920 Report Generated On  : 5/22/2012 11:38:36 AM Sample Identification  : Det 3920 Sample Title  : 2m LLD, FOV 12m Sample Information Sample Type Sample Geometry Peak Locate Threshold 3.00 Peak Locate Range (in channels) 100 - 4096 Peak Area Range (in channels)  : 100 - 4096 Identification Energy Tolerance 1.000 key Sample Size 1.000E+O00 g Sample Taken On  : 5/17/2012 11:51:00 AM Acquisition Started  : 5/17/2012 11:51:22 AM Live Time 600.0 seconds Real Time 601.0 seconds Dead Time 0.16 %

Energy Calibration Used Done On  : 8/4/2611 Efficiency Calibration Used Done On  : 8/17/2011 Efficiency ID  : 2rn Soil Sm Shld Performed by Date Reviewed by Date E] COPY 18 to 47

Peak Locate Analysis Report 5/22/2012 11:38:37 AM Page 2

      • P E AK L O CA TE R E PO RT***
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  • A* k****** ** ** ***** ***** ****** **
  • Detector Name: SN_3920 Sample

Title:

2m LLD, FOV 12m Peak Locate Performed on: 5/22/2012 11:38:36 AM Peak Locate From Channel: 100 Peak Locate To Channel: 4096 Peak Search Sensitivity: 3.00 Peak Centroid Centroid" Energy Peak No. Channel Uncertainty (keV) Significance 1 1165.13 0.3892 582.85 3.09 2 2921.16 0.2137 1460.66 7.89

? = Adjacent peak noted Errors quoted at 1.000 sigma 19 to 47

Peak.Analysis

. I Report 5/22/2012 11:38:37 AM Page 3

        • P E A IK A N A L Y S I S R E P 0 R T***

Detector Name: SN_3920 Sample

Title:

2m LLD, FOV 12m Peak Analysis Performed on: 5/22/20J.2 11:38:36 AM Peak Analysis From Channel: 100 Peak Analysis To Channel: 4096 Peak ROI ROI Peak Energy FWHM Net Peak Net Area Continuum No. start end centroid (keV) (keV) Area Uncert. Counts 1 1162- 1169 1165.13 582.85 1.25 1.08E+001 7.1.0 1.62E+001 2 2915- 2928 2921.16 1460.66 1.54 1.71E+002 13.37 3.04E+000 M = First peak in a multiplet region m = Other peak in a multiplet region F = Fitted singlet Errors quoted at 1.000 sigma 20 to 47

Nublide Identification Report 5/22/2012 11:38:37 AM Page 4

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      • N U C L I
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Sample

Title:

2rm LLD, FOV 12m Nuclide Library Used: C:\GENIE2K\CAMFILES\HBPP.NLB IDENTIFIED NUCLIDES ....................

Nuclide Id Energy Yield Activity Activity Name Confidence (keV) (%) (pCi/g ) Uncertainty K-40 0.996 1460,81* 10.67 1.374E+001 1.207E+000 Tl-208 0.688 277.35 6.80 583.14* 84.20 8.342E-002 5.491E-002 860.37 12.46

  • = Energy line found in the spectrum.

Energy Tolerance : 1.000 keV Nuclide confidence index threshold 0.30 Errors quoted at 1.000 sigma UN I DENT I FI ED PEA AK S Peak Locate Performed on: 5/22/2012 11:38:36 AM Peak Locate From Channel: 100 Peak Locate To Channel: 4096 Peak Energy Peak Size in Peak CPS Pea k Tol.

No. (keV) Counts per Second  % Uncertainty Type Nuclide All peaks were identified.

M = First peak in a multiplet reg ion m = Other peak in a multiplet reg ion F = Fitted singlet Errors quoted at 1.000 sigma 21 to 47

NuL-l'ide MDA Report 5/22/2012 11:38:37 AM Page 5

. . I N UC L IDE M DA R E POR T Detector Name: SN 3920 Sample Geometry:

Sample

Title:

2m LLD, FOV 12m Nuclide Library Used: C:\GENIE2K\CAMFILES\HBPP.NLB Nuclide Energy Yield Line MDA Nuclide MDA Activity Name (keV) (%) (pCi/g ) (pCi/g (pCi/g

+ K-40 1460.81* 10.67 9.5472E-001 9. 55E-001 I 3739E-1001 Co-60 1173.22 100.00 1.8273E-001 1. 83E-001 -6. 5896E-002 1332.49 100.00 1. 9793E-001 4 .5600E-002 Nb-94 702. 63 100.00 1.7495E-001 1. 68E-001 -4. 7263E-002 871. 10 100.00 1.6800E-001 -1 4617E-002 Ag-108m 79.20 7.10 1.1801E+001 2. 19E-001 -1. 2975E+000 433 .93 89.90 2.2376E-001 -9, 2283E-002 614 .37 90.40 2.4723E-001 -2. 0506E-001 722. 95 90.50 2.1874E-001 9.1741E-002 Cs-134 569.31 15.43 1.4419E+000 2.21E-001 -3.6585E-001 604 .70 97.60 2.2080E-001 -3.2585E-002 795.84 85.40 2.6160E-001 -1.2721E-002 Cs-137 661. 65 85.12 2.9969E-001 3. OOE-001 2.7738E-001 Eu-152 121 .78 28.40 1.3258E+000 7. 1OE-001 1.1491E-002 244.69 7.49 3.3434E+000 9.8786E-001 344.27 26.50 7.0956E-001 -6.1133E-001 778.89 12.74 1.5412E+000 -3.6755E-001 867. 32 4.16 4.7168E+000 -1.0484E+000 964 .01 14.40 1.5175E+000 -1.3070E-001 1085.78 10.00 2.0568E+000 -3.6315E-001 1112.02 13.30 1.6850E+000 -9.5302E-001 1407. 95 20.70 8.4534E-001 3.5688E-001 Eu-154 123.07 40.50 9.1728E-001 5. 15E-001 3.5029E-001 247 .94 6.60 3.7264E+000 -9.5294E-001 723.30 19.70 1.0339E-1000 6.8229E-001 873.19 11.50 1.4954E+000 -7.4302E-001 996.32 10.30 1.5732E+000 -5.1660E-001 1004 .76 17.90 9.7848E-001 -1.1725E-001 1274 .45 35.50 5.1461E-001 2.8913E-001 Eu-155 105.31 20.70 2.0415E+000 2. 04E+000 -1.3835E-001 Pb-206 803.10 100.00 2.1576E-001 2. 16E-001 6.0968E-002 Ac-228 338 .32 11.40 1.8988E+000 8. 49E-001 9.8160E-001 911.07 27.70 8.4911E-001 5.6391E-001 969.11 16.60 1.3370E+000 7.3501E-001 Th-234 63.29 3.80 4.5458E+001 1. 08E+001 2.9680E+001

92. 59 5.41 1.0831rE4+001 4.3335E+000 U-235 143.76 10.50 3.0022E+000 4. 98E-001 1.5837E-001 163.35 4.70 6.1955E+000 5.0275E-001 185.72 54.00 4.9762E-001 -2.0189E-001 205.31 4.70 4.8387E+000 -5.0339E+000 Np-237 311.98 38.60 5.9409E-001 5.94E-001 1.3611E-001 Am-241 59.54 35. 90 2 2 to4f 0109E+000 6. 01E+000 -2.1662E+-000

NuuLide MDA Report

. 6 5/22/2012 11:38:37 AM Page 6 Nuclide Energy Yield Line MDA Nuclide MDA Activity Name (keV) (%) (pCi/g ) (pCi/g (pCi/g

+ =Nuclide identified during the nuclide identification

  • = Energy line found in the spectrum

> = Calculated MDA is zero due to zero counts in the region or the region is outside the spectrum

@ = Half-life too short to be able to perform the decay correction 23 to 47

A Geometry Composer Report CANBERRA pate: Thursday, May 03, 2012 - 08:53:52

Description:

3920 2m Soil (12mFOV) Im on o0/s edge of FOV Sm Collimator D1.6 Comment: Calib. Date 5/3/12 File Name: C:\GEN[E2KVsocsldata\GEOMETRYVIn-Situ\CIRCULARjPLANE\3920 12m FOV Im Soil Sm CoI.geo Software: ISOCS Template: CIRCULARI.ANE, Version: (default)

Detector: Det_3920 Collimator: 25mm-90d old (okftSOCS 25mm side 90deg colimation [large hole collimator])

Environment; Temperature - 60 OF, Pressure = 760 mm Hg, Relative Humidity - 80%

Integration: Convergence = 1.00%, MDRPN - 24 (16), CRPN = 24 (16)

Dimensions (cm) 2 Layeri 1s ~' i~t 1.6 1.00

-3 Lae2 0 ____

4 Layer 3 ____

5 LaEr4 0 ', )." j,:

7 Lsyer6 '0 ~~___

a Lawer 7 t0 LAyw 9 ____

it Lawerl0 12 7777er

( 13 Absewbr 2 List of energiles for efficiency curve generation 10.0 20.0 30.0 45.0 58.0 59.5 60.0 61.0 70.0 80.0 100.0 150k0 200.0 300.0 400.0 600.0 660.0 661.7 662.0 663.0 800.0 1000.0 1172.0 1173.2 1174.0 1331.0 1332.5 1333.0 1500.0 2500.0 fEAUA 3~

tncopy A P#ttb7 Ovo

A Geometry Composer Report CANBERRA P.Date: Thursday, May 03, 2012 - 08:53:52

==

Description:==

3920 2m Soil (12mFOV) Im on o/s edge of FOV Sm Collimator D1.6 Comment: Callb. Date 5/3/12 Fife Name:  :\GENIE2KIsocs\data\GEOMETRY\In-Situ\CIRCULAR_PLANE\3920 12m FOV Im Soil Sm Coltgeo Software: ISocs Template: CIRCULARJCLANE, Version: (default)

'T eaOW, 047

ISOCS/LABSOCS RESULTS ISOCS/LabSOCS File: C: \GENIE2K\isocs\data\GEOMETRY\In-Situ\CIRCULARPLANE\3920 1" ISOCS/LabSOCS Time: 05/03/12 08:46:38 Genie Cal. File: C:\GENIE2K\CALFILES\3920 12m FOV Im SC dl.6.CAL f rie Cal Time: 05/03/12 09:01:38

'j iplate: CIRCULAR PLANE Geom

Description:

2m Soil Im D1.6 Commient: ISOCS:UNITS=ACT/G CALIB. DATE 5/3/12 Detector: DET 3920 Collimator: 25MM-90D OLD Convergence: 1.00 %

Area [Sq Meters]: 1.0029e+000 (C)

Mass [Grams]: 2.4069e+005 (C)

Length [Meters]: not used (C) = Value calculated by ISOCS (U) = Value modified by user Energy Efficiency %Uncertainty %Convergence Final # bf Voxels

( X Mass) 10.00 7.07653e-021 20.0 -0.574994 4070 20.00 2.31320e-016 20.0 -0.683346 128670 30.00 2.56578e-007 20.0 -0.670869 128670 45.00 5.04790e-003 15.0 -0.792136 8090 58.00 8.22524e-002 10.0 -0.379550 8090 59.54 1.01969e-001 10.0 -0.366892 8090 60.00 1.08470e-001 10.0 -0.362993 8090 61.00 1.20183e-001 10.0 -0.355210 8090 70.00 2.57866e-001 10.0 -0. 152227 4070 80.00 4.46745e-001 10.0 -0.188625 4070 100.00 7.39453e-001 10.0 -0.280100 4070 50.00 1.01161e+000 10.0 -0.302081 4070 200.00 1.01221e+000 8.0 -0.314004 4070 300.00 8.78829e-001 8.0 -0.319394 4070 400.00 7.69240e-001 8.0 -0.278667 4070 600.00 6.60629e-001 6.0 -0.188318 4070 660.00 6. 41513e-001 6.0 -0.171501 4070 661.65 6. 40543e-001 6.0 -0.171032 4070 662.00 6. 42180e-001 6.0 -0.170946 4070 663.00 6. 40235e-001 6.0 -0.170934 4070 800.00 6. 07348e-001 6.0 -0.147361 4070 1000.00 5. 70982e-001 4.0 -0.129219 4070 1172.00 5. 47952e-001 4.0 -0. 118688 4070 1173.22 5. 48706e-001 4.0 -0.118499 4070 1174.00 5. 47969e-001 4.0 -0.119254 4070 1331.00 5.29867e-001 4.0 -0.114092 4070 1332.49 5. 30880e-001 4.0 -0.114327 4070 1333.00 5.30972e-001 4.0 -0.114317 4070 1500.00 5.06349e-001 4.0 -0.110963 4070 2500.00 3.91114e-001 4.0 -0.107900 4070 26 to 47

(Interpolated Etffioency Callbration Curve I0E Measured - Calculated 0 500 1000 1500 2000 2600 Energy (keV)

Datasource: SN_3920 27 to 47

Interpolatedi Eff(clency Cafitbatioti Curve 1 03 Aeasu~ed - CalculatedI 0

0.i 0.0I001 le-l le-006 le-007 le-013-Il I liii I I I I I liii I I I I I I e-0115i 14- zw ilk I e-0 I e-O 1=22 1e-01I

-w-u lo lu-uIU -

le-020 -

lu Uý I 10 100 1000 10000 Energy (keV)

Datasource: SN"3920 28 to 47

G A M MA S P E C T R U M A N A L Y S I S

      • D * **** ***** ********** ********************** ***************************

Detector SN_3920 Report Generated On 5/22/2012 11:26:05 AM Sample Identification Det 3920 Sample Title Im on Edge-Of-View LLD Sample Information Sample Type Sample Geometry Peak Locate Threshol.d 3.00 Peak Locate Range (in channels) 100 - 4096 Peak Area Range (in channels) 100 - 4096 Identification Energy Tolerance 1.000 keV Sample'Size 1.000E+000 g Sample Taken On  : 5/17/2012 11:51:00 AM Acquisition Started  : 5/17/2012 11:51:22 AM Live Time 600.0 seconds Real Time 601.0 seconds Dead Time 0.16 %

Energy Calibration Used Done On  : 8/4/2011 Efficiency Calibration Used Done On  : 5/3/2012 Efficiency ID  : 2m Soil im D1.6 performed by______________ Date Reviewed by Date C.UPIVP 29 to 47

IPeak.-Locate Analysis Report 5/22/2012 11:26:05 AM Page 2

          • P EA K L O CA TE R EP O R T* *
        • ** ** * *
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Detector Name: SN 392 Sample

Title:

Im on Edge-Of-View LLD Peak Locate Performed on: 5,/22/2012 11:26:05 AM Peak Locate From Channel: 100 Peak Locate To Channel: 4096 Peak Search Sensitivity: 3.00 Peak Centroid Centroid Energy Peak No. Channel Uncertainty (keV) Significance 1 1165.13 0.3892 582.85 3.09 2 2921.16 0.2137. 1460.66 7.89

? = Adjacent peak noted Errors quoted at 2.000 sigma 30 to 47

Peak Analysis.Report 5/22/2012 11:26:05 AM Page 3

        • P E A K A NA 1 Y S I S R E P 0 R T***
      • *** *** ** **
  • k***** ***** ** ****** *** *****k*** **** ***** **** ** * **** ****** ******

Detector Name: SN_3920 Sample

Title:

Im on Edge-Of-View LLD Peak Analysis Performed on: 5/22/2012 11:26:05 AM Peak Analysis From Channel: 100 Peak Analysis To Channel: 4096 Peak ROI ROI Peak Energy FWHM Net Peak Net Area Continuum No. start end centroid (keV) (keV) Area Uncert. Counts 1 1162- 1169 1165.13 582.85 1.25 1.08E+001 14.21 1.62E+001 2 2915- 2928 2921.16 1460.66 1.54 1.71E+002 26.74 3.04E+000 M = First peak in a multiplet region m = Other peak in a multiplet region F = Fitted singlet Errors quoted at 2.000 sigma 31 to 47

In.terference Corrected Activity Report 5/22/2012 11:26:05 AM Page 4

  • N U C L I D E I D E N T I F I C A T I O N R E P O R T
  • Sample

Title:

Im on Edge-Of-View LLD Nuclide Library Used: C:\GENIE2K\CAMFILES\HBPP.NLB

.................... IDENTIFIED NUCLIDES ....................

Nuclide Id Energy Yield Activity Activity Name Confidence (keV) (%) (pCi/g Uncertainty K-40 0.996 1460.81* 10.67 1.41018E+002 2.47734E+001 Tl-208 0.686 277.35 6.80 583.14* 84.20 8.68281E-001 1.14305E+000 860.37 12.46

  • = Energy line found in the spectrum.

@ = Energy line not used for Weighted Mean Activity Energy Tolerance : 1.000 keV Nuclide confidence index threshold 0.30 Errors quoted at 2.000 sigma 32 to 47

Interference Corrected Activity Report 5/22/2012 11:26:05 AM Page 5

      • I NT ER E R EN CE CO RRE C T ED R EP O RT ***
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Nuclide Wt mean Wt mean Nuclide Id Activity Activity Name Confidence (pCi/g Uncertainty K-40 0.996 1,410184E+002 2.477343E+001 TI-208 0.686 8.682807E-001 1.143055E+000

? = nuclide is part of an undetermined solution X = nuclide rejected by the interference analysis

@ = nuclide contains energy lines not used in Weighted Mean Activity Errors quoted at 2.000 sigma

    • * ****** U N I D E N T I F I E D PEAKS Peak Locate Performed on: 5/22/2012 11:26:05 AM Peak Locate From Channel: 100 Peak Locate To Channel: 4096 Peak Energy Peak Size in Peak CPS Peak Tol.

No. (keV) Counts per Second  % Uncertainty Type Nuclide All peaks were identified.

33 to 47

I . I NLIClide MDA Report 5/22/201.2 11:26:05 AM Page 6

      • * **** * * * **** *** ************* *********** * ***** **** k **** ****** ** * **********

N U C L ID E M DA REPORT

  • * * ** * * ** * * ** * ** ** * ** * *** * * * * ** * * ** * * * * * * * * * * * *** *k* * * * * * * * * * *L* * *** * * * * * * *
  • Detector Name: SN_3920 Sample Geometry:

Sample

Title:

Im on Edge-Of-View LLD Nuclide Library Used: C:\GENIE2K\CAMFILES\HBPP.NLB Nuclide Energy Yield Line MDA Nuclide MDA Activity Name (keV) (%) (pCi/g ) (pCi/g (pCi/g

+ K-40 1460.81* 10.67 9.7992E-000 9.80E+000 1.4102E+002 Co-60 1173. 22 100.00 1.8871E+000 1.89E+000 -6.8051E-001 1332.49 100.00 2.0387E+000 4. 6970E-001 Nb-94 702.63 100.00 1.8236E+000 1.75E+000 -4 .9265E-001 871.10 100.00 1.7455E+000 -1.5187E-001 Ag -- 108m 79.20 7.10 1.1289E+002 2.28E+000 -1.2412E+001 433.93 89.90 2.3010E+000 -9.4897E-001 614.37 90.40 2.5770E+000 -2. 1375E+000 722.95 90.50 2.2791E+000 9.5586E-001 Cs-134 569.31 15.43 1.4993E+001 2.30E+000 -3.8042E+000 604.70 97.60 2.3011E+000 -3.3959E-001 795.84 85.40 2.7219E+000 -1.3236E-001 Cs-137 661 .65 85.12 3.1257E+000 3.13E+000 2. 8930E+000 Eu-152 121.78 28.40 1.2558E+001 7.20E+000 1.0884E-001 244 .69 7.49 3.3111E+001 9.7831E+000 344 .27 26.50 7.2030E+000 -. 6. 2058E+000 778.89 12.74 1.6041E+001 -3. 8255E+000 867 .32 4.16 4.9011E+001 -1. 0894E+001 964 .01 14.40 1.5741E+001 -1. 3558E+000 1085.78 10.00 2.1301E+001 -3. 7610E+000 1112.02 13.30 1.7445E4-001 -9. 8671E+000 1407.95 20.70 8.6832E+000 3. 6658E+000 Eu-154 123.07 40.50 8.6920E+000 5.31E+000 3. 3192E+000 247.94 6.60 3.6941E+001 -9. 4470E+000 723.30 19.70 1.0772E+001 7 .1088E+000 873.19 11.50 1.5537E+001 -7 .7197E+000 996.32 10.30 1.6311E+001 -5.3560E+000 1004.76 17.90 1.0144E+001 -1.2154E+000 1274.45 35.50 5.3131E+000 2.9851E+000 Eu-155 105.31 20.70 1.9230E+001 1.92E+001 -1.3032E+000 Pb-206 803.10 100.00 2.2446E+000 2.24E+000 6.3427E-001 Ac-228 338.32 11.40 1.9254E+001 8.682E+000 9.9534E+000 911.07 27.70 8.8159E+000 5.8548E+000 969.11 16.60 1.3867E+001 7.6238E+000 Th-234 63.29 3.80 4.5315E+002 1.02E+002 2.9586E+002 92.59 5.41 1.0239E+002 4.0966E+001 U-235 143.76 10.50 2.8618E+001 4.82E+000 1.5096E+000 163.35 4.70 5.9518E+001 4.8298E+000 185.72 54.00 4.8250E+000 -1.9575E+000 205.31 4.70 4.7266E+001 -4.9172E+001 Np-237 311.98 38.60 5.9930E+000 5.99E+000 1.3730E+000 Am-241 59.54 35.9034 to 4.0868E+001 6.09E+001 -2.1936E+001

I . ;

NUClide MDA Report 5/22/2012 11:26:05 AM Page 7 Nuclide Energy Yield Line MDA Nuclide MDA Activity Name (keV) (%) (pCi/g ) (pCi/g ) (pCi/g

+ = Nuclide identified during the nuclide identification

  • = Energy line found in the spectrum

> = Calculated MDA is zero due to zero counts in the region or the region is outside the spectrum

= Half-life too short to be able to perform the decay correction 35 to 47

A Geometry Composer Report CANBERRA

, Date: Thursday, May 03, 2012 - 15:43:51

Description:

3920 2m Soil (12mFOV) Im on o/s edge of FOV Sm Collimator D2.0 Comment: Calib. Date 5/3/12 File Name: C:\GEN[E2K*isocscata\GEOMETRY\In-Situ\CIRCULARPLANE\3920 12m FOV Im Soil Sm Col D2.geo Software: ISOCS Template: CIRCULARPLANE, Version: (default)

Detector: Det_3920 Collimator: 25mm-90d old (oldISOCS 25mm side 90deg collimation [large hole collimator])

Environment: Temperature = 60 OF, Pressure = 760 mm Hg, Relative Humidity = 80%

Xntegration: Convergence - 1.00%, MDRPN = 24 (16), CRPN - 24 (16)

Dimensions (cml 1

.2 51aae wat U LayrI *15 2

__ t4We2 0 4 Layer 3 0 5La Ls4 0

-Law Le5 0 7 !M e6 0 8 kayff 7 0 9 Uar8 0 10 LAye9 0 11 LOW1rl 0 12 M"!Wt~rI__

13 Absorb 2 __

  • I 14M Source - Deteco 200 I W I V I List of energies for efficiehcy curve generation 10.0 20.0 30.0 45.0 58.0 59.5 60.0 61.0, 70.0 80.0 100.0 150.0 200.0 300.0 400.0 600.0 660.0 661.7 662.0 66310 800.0 1000.0 1172.0 1173.2 1174.0 1331.0 1332.5 1333.0 1500.0 2500.0 1.1 won U0l0aftes ro coPY I

A 0, ;"WL P

paO1tft

A Geometry Composer Report CANBERRA Date: Thursday, May 03, 2012 - 15:43:51

==

Description:==

3920 2m Soil (12mFOV) irn on o/s edge of FOV Sm Collimator D2.0 Comment: Calib. Date 5/3/12 File Name: C:\GENIE2K~isocs=ata\GEOMETRY\ln-SituXCIRCULA,_PLANE\3920 12m FOV Im Soil Sm Col D2.geo Software: ISOCS Template: CIRCULAKPLANE, Version: (default)

Pagf f6%7

ISOCS/LABSOCS RESULTS ISOCS/LabSOCS File: C:\GENIE2K\isocs\data\GEOMETRY\In-Situ\CIRCULARPLANE\3920 1:

ISOCS/LabSOCS Time: 05/03/12 08:52:44 Genie Cal File: C:\GENIE2K\CALFILES\3920 12m FOV Im SC d2.0.CAL U hie Cal Time: 05/03/12 09:24:51

.aplate: CIRCULAR PLANE Georn

Description:

2m Soil Im D2.0 Comment: ISOCS:UNITS=ACT/G CALIB. DATE 5/3/12 Detector: DET 3920 Collimator: 25MM-90D OLD Convergence: 1.00 %

Area [Sq Meters]: 1.0029e+000 (C)

Mass (Grams]: 3.0086e+005 (C)

Length [Meters]: not used (C) =Value calculated by ISOCS (U) = Value modified by user Energy Efficiency %Uncertainty %Convergence Final if of Voxels

( X Mass) 10.00 3.65168e-021 20.0 -0.249542 2030 20.00 1.13302e-016 20,0 -0.145776 514940 30.00 1. 30428e-007 20.0 -0. 543440 514940 45.00 2. 90801e-003 15.0 -0. 765265 128670 58.00 5.54817e-002 10.0 -0.422703 128670 59.54 6.99465e-002 10.0 -0. 399607 128670 60.00 7. 47832e-002 10.0 -0. 393034 128670 61.00 8. 65387e-002 10.0 -0. 798743 8090 70.00 2. 00474e"001 10.0 -0. 609316 8090 80.00 3. 72482e-001 10.0 -0.525756 8090 100.00 6.76365e-001 10.0 -0.386913 8090

( 50.00 1.01649e+000 10.0 -0.193214 4070 200.00 1.04683e+000 8.0 -0.242543 4070 300.00 9.28692e-001 8.0 -0.287338 4070 400.00 8.21726e-001 8.0 -0.262956 4070 600.00 7,15922e-001 6.0 -0.178655 4070 660.00 6.97567e-001 6.0 -0.162301 4070 661.65 6.96619e-001 6.0 -0.161874 4070 662.00 6.98412e-001 6.0 -0.161790 4070 663.00 6.96381e-001 6.0 -0.161834 4070 800.00 6.65188e-001 6.0 -0'.139595 4070 1000.00 6.30763e-001 4.0 -0. 123062 4070 1172.00 6..09146e-001 4.0 -0.113856 4070 1173.22 6.10046e-001 4.0 -0.113665 4070 1174.00 6. 09176e-001 4.0 -0.114523 4070 1331.00 5. 91997e-001 4.0 -0. 110425 4070 1332.49 5.93125e-001 4.0 -0. 110654 4070 1333.00 5. 93234e-001 4.0 -0.110646 4070 1500.00 5. 68268e-001 4.0 -0. 108198 4070 2500.00 4. 46362e-001 4.0 -0.108020 4070 38 to 47

Interpolatod Efficiency Calibration Curve S -E tMeasured - Calculated 10 100 1000 10000 Energy (keY)

Datasource: SN_3920 39 to 47

Interpolated Elflicloncy Calibration Curve I I Measured Calculated I 0 600 1000 1500 2000 2500 Eneroy (koV)

Datasource: SN.3920 40 to 47

G A MMA S P EC T RUM A NA LY STIS Detector !SN 3920 Report Generated On 5/22/2012 11:27:11 AM Sample Identification Det 3920 Sample Title im on Edge-Of-View LLD Sample Information Sample Type Sample Geometry Peak Locate Threshold S3.00 3100 - 4096 Peak Locate Range (in channels)

Peak Area Range (in channels) 100 - 4096 Identification Energy Tolerance  : 1.000 keV Sample Size 1.000E+000 g Sample Taken On 5/17/2012 11:51:00 AM Acquisition Started 5/17/2012 11:51:22 AM Live Time 600.0 seconds Real Time 601.0 seconds Dead Time 0.16 %

Energy Calibration Used Done On  : 8/4/2011 Efficiency Calibration Used Done On  : 5/3/2012 Efficiency ID  : 2m Soil im D2.0 Performed by Date Reviewed by Date

~jCOPY 41 to 47

'Pea'k'locate Analysis Report 5/22/2012 11:27:12 AM Page 2 P E A K L 0 C A T E R E P 0 R T Detector Name: SN_3920 Sample

Title:

im on Edge-Of-View LLD Peak Locate Performed on: 5/22/2012 11:27:11 AM Peak Locate From Channel: 100 Peak Locate To Channel: 4096 Peak Search Sensitivity: 3.00 Peak Centroid Centroid Energy Peak No. Channel Uncertainty (keV) Significance 1 1165.13 0.3892 582.85 3.09 2 2921.16 0.2137 1460.66 7.89

? = Adjacent peak noted Errors quoted at 2.000 sigma 42 to 47

'Peat'Analysis Report 5/22/2012 11:27:12 AM Page 3 P E A K A N A L Y S I S R E P 0 R T A........** **** ****** ****** **** ** ** ***** *** **** ******* **** **** ****** ** ********

  • Detector Name: SN_3920 Sample

Title:

1m on Edge-Of-View LLD Peak Analysis Performed on: 5/22/2012 11:27:11 AM Peak Analysis From Channel: 100 Peak Analysis To Channel: 4096 Peak ROT ROI Peak Energy FWH'M Net Peak Net Area Continuum No. start end centroid (keV) (keY) Area Uncert. Counts 1 1162- 1169 1165.13 582.85 1.25 1.08E-001 14.21 1.62E+001 2 2915- 2928 2921.16 1460.66 1.54 1.71E+002 26.74 3.04E+000 M = First peak in a multiplet region m = Other peak in a multiplet region F = Fitted singlet Errors quoted at 2.000 sigma 43 to 47

.Int-eiference Corrected Activity Report 5/22/2012 11:27:12 AM Page 4

  • *** *************-k** ** ***** ** **** ***** * * ** *** *** **** ***** * **** **** *** *****
      • N U C L I D E I D E N T I F I C A T I O N R EPORT ****

Sample

Title:

Im on Edge-Of-View LLD Nuclide Library Used: C:\GENIE2K\CAMFILES\HBPP.NLB IDENTIFIED NUCLIDES Nuclide Id Energy Yield Activity Activity Name Confidence (keV) (%) (pCi/g Uncertainty K-40 0.996 1460.81* 10.67 1.25780E+ 002 2.20964E+001 TI-208 0.687 277.35 6.80 583.14* 84.20 8.02044E-001 1.05586E+000 860.37 12.46

  • = Energy line found in the spectrum.

@ = Energy line not used for Weighted Mean Activity Energy Tolerance : 1.000 keV Nuclide confidence index threshold 0.30 Errors quoted at 2.000 sigma 44 to 47

Intetference Corrected Activity Report 5/22/2012 1.1:27:12 AM Page 5

Nuclide Wt mean Wt mean Nuclide Id Activity Activity Name Confidence (pCi/g Uncertainty K-40 0.996 1.257799E+002 2.209641E+001 TI-208 0.687 8.020444E-001 1.055858E+000

? = nuclide is part of an undetermined solution X = nuclide rejected by the interference analysis

@ = nuclide contains energy lines not used in Weighted Mean Activity Errors quoted at 2.000 sigma UNIDENTIFIED PEAKS Peak Locate Performed on: 5/22/2012 11:27:11 AM Peak Locate From Channel: 100 Peak Locate To Channel: 4096 Peak Energy Peak Size in Peak CPS Peak Tol.

No. (keV) Counts per Second  % Uncertainty Type Nuclide All peaks were identified.

45 to 47

'Nudlide MDA Report 5/22/2012 11:27:12 AM Page 6

    • **** ** ***** * ** **** * ** k* * ***** ******* ***** ************ *** * **** * ** * *****
  • k * **
  • N U C L I D E M DA R EP 0R T
                                    • * **** ************* ***** k * *** * * *** **** * ** ***** **** ******** *
  • Detector Name: SN_3920 Sample Geometry:

Sample

Title:

im on Edge-Of-View LLD Nuclide Library Used: C:\GENIE2K\CAMFILES\KBPP.NLB Nuclide Energy Yield Line MDA Nuclide MDA Activity Name (keV) (%) (pCi/g ) (pCi/g (pCi/g K-40 1460,81* 10.67 8.7403E+000 8.74E-1000 1 .2578E+002 Co-60 1173.22 100.00 1. 6973E+000 1.70E+000 -6. 1208E-001 1332.49 100.00 1.8248E+000 4.2041E-001 Nb-94 702.63 100.00 1. 6730E+000 1. 59E+000 -4 .5196E-001 871.10 100.00 1.5885E+000 -1. 3821E-001 Ag-108m 79.20 7.10 1.3611E+002 2.09E+000 -1. 4965E+001 433.93 89.90 2.1478E+000 -8. 8580E-001 614.37 90.40 2.3760E+000 -1 9708E+000 722.95 90.50 2.0886E+000 8 .7600E-001 Cs-134 569.31 15.43 1.3861E+001 2. 12E+000 -3. 5169E+000 604.70 97.60 2.1228E+000 -3. 1327E-001 795.84 85.40 2.4857E+000 - .2088E-001 Cs-137 661.65 85.12 2.8741E+000 2. 87E+000 2. 6601E+000 Eu-152 121.78 28.40 1.3116E+001 6.78E+000 1.1368E-001 244.69 7.49 3.1674E+001 9. 3587E+000 344.27 26.50 6.7810E-1000 -5.8423E+000 778.89 12.74 1.4661E+001 -3. 4963E+000 867 .32 4.16 4.4610E+001 -9. 9158E+000 964 .01 14.40 1.4270E+001 -1. 2290E+000 1085.78 10.00 1.9219E+001 -3 3934E+000 1112.02 13.30 1.5725E+001 -8. 8944E+000 1407.95 20.70 7.7557E+000 3.2743E+000 Eu-154 123 .07 40.50 9.0563E+000 4.76E+000 3. 4584E.,+000 247.94 6.60 3.5314E+001 -9.0309E+000 723.30 19.70 9.8721E+000 6.5148E+000 873.19 11.50 1.4138E+001 -7.0247E+000 996.32 10.30 1.4767E+001 -4.8491E+000 1004.76 17.90 9.1804E+000 -1.1000E+000 1274.45 35.50 4.7637E+000 2.6764E+000 Eu-155 105.31 20.70 2.0773E+001 2.08E+001 -1.4078E+000 Pb-206 803.10 100.00 2.0491E+000 2. 05E+000 5.7904E-001 Ac-228 338.32 11.40 1.8138E+001 8.01E+000 9.3765E+000 911.07 27.70 8.0091E+000 5.3190E+000 969.11 16.60 1.2568E+001 6.9096E+000 Th-234 63.29 3.80 6.1653E+002 1. 16E+002 4 .0254E+002 92.59 5.41 1.1557E+002 4.6241E+001 0-235 143.76 10.50 2.8762E+001 4.70E+000 1. 5172E+000 163. 35 4.70 5.8729E+001 4 .7657E+000 185.72 54.00 4.7002E+000 -1. 9069E+000 205.31 4.70 4.5639E+001 -4 .7480E+001 Np-237 311.98 38.60 5.6629E+000 5. 66E+000 1.2974F+000 Am-241 59.54 35.9046 to41. 8734E+001 8.87E+001 -3. 1979E+001

'NuO.Lrle MDA Report 5/22/2012 11:27:12 AM Page 7 Nuclide Energy Yield Line MDA Nuclide MDA Activity Name (keV) (%) (pCi/g ) (pCi/g ) (pCi/g

+ = Nuclide identified during the nuclide identification

  • = Energy line found in the spectrum

> = Calculated MDA is zero due to zero counts in the region or the region is outside the spectrum

@ = Half-life too short to be able to perform the decay correction 47 to 47

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