ML13038A356
| ML13038A356 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/16/2009 |
| From: | Northeast Technology Corp |
| To: | Entergy Nuclear Operations, NRC/FSME |
| Chawla M | |
| References | |
| NET-313-01P | |
| Download: ML13038A356 (92) | |
Text
NET-313-01P Table of Contents 1 INTRODUCTION ......................................................................................................... 1 2 SCOPE OF SECOND TEST CAMPAIGN AT PALISADES NUCLEAR PLANT........ 2 2.1 SPENT FUEL RACK DESCRIPTION ........................................................................... 3 2.2 METHODOLOGY...................................................................................................... 3 2.3 NEUTRON ABSORBER PANELS SELECTED FOR TESTING .......................................... 7 2.3.1 Panels Selected for Areal Density Measurement .......................................... 7 2.3.2 Restricted Cells ............................................................................................. 9 3 BADGER TEST RESULTS ....................................................................................... 10 3.1 STATISTICAL ANALYSIS OF TEST RESULTS ............................................................ 10 3.2 FULL PANEL VERIFICATION (FAST SCAN) .............................................................. 15 3.3 MINIMUM AREAL DENSITY SPOT MEASUREMENTS ................................................. 22 4
SUMMARY
AND CONCLUSIONS ........................................................................... 26 5 REFERENCES .......................................................................................................... 27 APPENDIX A .................................................................................................................. 28 i
NET-313-01P List of Figures Figure 2-1 Palisades Spent Fuel Pool Layout as of November 2008 .................... 5 Figure 2-2 Palisades Storage Cell with Carborundum Neutron Absorber Plates .. 6 Figure 3-1 Panel Effective Minimum Areal Density and Distribution ................... 11 Figure 3-2 Histogram of the Measurements that Fell Below the Highest Calibration Standard .................................................................................... 12 Figure 3-3 Normality Plot of the Areal Density Values ........................................ 13 Figure 3-4 Pool Map Showing Panels Analyzed and Calculated Areal Density .. 14 Figure 3-5 Full Panel Scan of Panel M7E ........................................................... 16 Figure 3-6 Full Panel Scan of Panel M7N ........................................................... 17 Figure 3-7 Full Panel Scan of Panel M7S ........................................................... 18 Figure 3-8 Full Panel Scan of Panel M7W .......................................................... 19 Figure 3-9 Full Panel Scan of Panel Q8E ........................................................... 20 Figure 3-10 Full Panel Scan of Panel Q8W ........................................................ 21 Figure 3-11 Results for Panel H15E ................................................................... 24 Figure 3-12 Results for Panel H18E ................................................................... 25 ii
NET-313-01P List of Tables Table 2-1 Calibration Standard Areal Density Values ........................................... 2 Table 2-2 Panels Selected for Areal Density Measurements and Full Panel Characterization and Approximate Values of Absorbed Gamma Dose ......... 7 Table 2-3 Panels Selected for Full Panel Characterization Only .......................... 9 Table 3-1 Panel Minimum and Nominal Areal Density Spot Measurements ....... 22 iii
NET-313-01P 1 Introduction An initial BADGER test was performed at Entergy Nuclear Operations Palisades Nuclear Plant, July 14 - July 24, 2008. The results of that test campaign analysis are documented in the Northeast Technology Corp. (NETCO) report NET-299-
- 01. Test results showed that, based upon attenuated neutron count rates, all of the average panel areal densities were greater than the lowered calibration cell areal density of 0.0566 gm B10/cm2 at a confidence level of 95%. However, when the data was analyzed to confirm that at least 95% of the individual measurements for a panel exceeded the calibration cell areal density of 0.0566 gm B10/cm2 with a confidence level of 95% (95/95), some panels failed to meet that criterion.
This report describes a second round of testing performed on 60 of the Palisades spent fuel rack absorber panels. The intent of this testing was to measure the panel areal density utilizing a more rigorous calibration and counting method usually performed on Boraflex panels. This analysis provides a gross measurement (via fast scan of the entire stack of plates) of the overall panel integrity and a spot measurement of the lowest areal density region of the panel based upon the fast scan measurement. Six additional panels were measured for overall panel integrity only. The cells that contain these six panels have been determined to be restricted cells. Restricted cells are cells in which fuel assemblies have experienced interferences during fuel insertion and removal.
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NET-313-01P 2 Scope of Second Test Campaign at Palisades Nuclear Plant As described in report NET-299-01, the principle of BADGER operation is based on the attenuation of neutrons, through the neutron absorber panels and flux trap, between a 252Cf source and a set of BF3 detectors[1,2]. The number of thermal neutrons reaching the neutron detectors is a function of the number of boron-10 atoms (10B areal density) in the neutron absorber panel between the source and detectors. The magnitudes of the detector signals, in turn, are a function of the 10B areal density in the neutron absorber plates. For plates with high areal density, the detector signals are low, whereas for low areal density plates the signals are high. BADGER is calibrated by passing the source and detector heads through a calibration cell containing a section of neutron absorber with a known 10B areal density. The detector signals are fed to four pre-amplifiers that are mounted on the drive assembly. Shielded cables connect the preamplifiers to four amplifiers in an electronics console positioned alongside the pool. The electronics console also houses a power supply used by the amplifier, pre-amps, and detectors. The amplified detector signals are fed to a special counter board in a laptop computer for counting and recording. The computer serves as a data-logger and as a control unit for the stepper motor and positioning encoder.
For the purposes of this test, three areal density standards were used in the calibration cell with values that bounded the expected minimum areal density values of the panels. The table below shows the areal density standard values and the count rates in those standards from detectors 2 & 4. These values are informative in demonstrating the sensitivity to count rate that the areal density measurements have.
Table 2-1 Calibration Standard Areal Density Values Calibration Standard Areal Detector 2 Average Detector 4 Average Density Value, g B10/cm2 Count Rate, cps Count Rate, cps 0.0235 29.8 22.4 0.0470 26.4 19.7 0.0705 25.2 19.2 2
NET-313-01P 2.1 Spent Fuel Rack Description The Palisades spent fuel pool has spent fuel storage racks of two different designs; one design incorporates Boraflex neutron absorbers, the other a borated graphite neutron absorber manufactured by the Carborundum Company.
The latter racks were subject to BADGER testing.
The spent fuel racks in the Palisades spent fuel pool with the Carborundum neutron absorber are shown in Figure 2-1. The racks consist of six modules of varying size. The rack modules are formed by assembling an array of individual storage cells. The storage cells are separated by a 0.69" flux trap on a 10.25" pitch. The individual cells are constructed from two concentric square tubes as shown in Figure 2-2. The inner tube has a nominal inside dimension of 8.56" and is 0.125" thick. The outer tube has an outside dimension of 9.56" and is also 0.125" thick. Between the two concentric square tubes are plates of Carborundum neutron absorber on each face of the cell. The plates are nominally 0.210" thick, 8.26" wide and 33.5" long. Four such plates are stacked on each face to form a continuous neutron absorber plate 134.00 inches long referred to as a panel. In this report, the stack of 4 plates comprising the neutron absorber on one side of the storage cell is referred to as a panel. The overall length of the storage cells is 149.5 inches. When assembled into a rack module, each storage cell for a fuel assembly has two plates of Carborundum neutron absorber between each cell.
2.2 Methodology Determination of areal density values for each panel is based upon a fit of the neutron transmission ratio in the calibration cell standards. This fit is then used to determine panel areal density by measuring the neutron transmission ratio across the area of interest and applying the fit function to that data. The fit is a second order linear fit of the natural logarithm of the transmission ratio as shown below. The resultant calculated areal density is a composite value intended to represent the effective areal density of the intervening absorber material.
Carborundum material is no longer available so Boraflex was used as a calibration substitute. The reported values, therefore, represent the effective areal density measured taking into account other conditions that may exist within the restricted cells.
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NET-313-01P Equation 2-1: Areal Density Fit Function A = m 1 Ln ( TR ) 2 + m 2 Ln ( TR ) + b Where :
TR A U
A Attenuated Neutron Count Rate U Unattenuat ed Neutron Count Rate For each panel tested, three scans were performed. A Fast-Scan of the entire panel using a short count time (10 seconds) at each elevation is done to determine the gross features of the absorber panel. A scan of the un-attenuated region of the panel (above the absorber material) is performed to determine the un-attenuated neutron count rate for use in the areal density fit function. Finally, a Slow-Scan of two elevations within the panel is performed using a long count time (300 seconds). The Slow-Scans are completed at the axial elevation where the fast-scan showed the highest count rate. The Slow-Scan provides a quantitative measure of the lowest areal density in the panel, which is comprised of a stack of four neutron absorber plates. This Slow-Scan is done to reduce the counting uncertainty of the measurement, as compared to the Fast-Scan, by increasing the total number of neutron counts. An average of the areal density values for those Slow-Scan points is reported for each panel.
Both Nominal and Minimum areal density values are calculated and reported in Section 3. All Nominal calculations are performed using the as-recorded count rates for the panels and calibration standards. Minimum areal density calculations are performed using count rate values that have been adjusted to include the counting uncertainty as follows: calibration cell count rates have the uncertainty subtracted from the recorded value to conservatively bias the calibration curve and panel count rates have the uncertainty added to the recorded value to minimize the calculated areal density. Values reported in Appendix A are Minimum values.
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NET-313-01P N
Figure 2-1 Palisades Spent Fuel Pool Layout as of November 2008 5
NET-313-01P Figure 2-2 Palisades Storage Cell with Carborundum Neutron Absorber Plates 6
NET-313-01P 2.3 Neutron Absorber Panels Selected for Testing Sixty panels were selected by Entergy Nuclear Operations for areal density measurement and full scan panel characterization. An additional six panels were selected for fast scan panel characterization only.
2.3.1 Panels Selected for Areal Density Measurement A group of sixty (60) panels was initially selected for the first test campaign at Palisades station. Only 38 of those original panels could be tested during that campaign. Table 2-2 shows the panels selected for testing and the gamma dose absorbed for those panels. The absorbed dose was computed using the RACKLIFE program based upon data provided by Palisades[3]; RACKLIFE calculates absorbed dose to Boraflex panels and contains mass absorption coefficients for boron carbide, silicon and oxygen. While the mass absorption coefficients for Carborundum are similar, they are not the same and, as such, are strictly valid on a relative basis only. Panels tested during the first campaign have been further analyzed during this campaign.
Table 2-2 Panels Selected for Areal Density Measurements and Full Panel Characterization and Approximate Values of Absorbed Gamma Dose Panel Relative Dose, rads F9E 5.03E+08 T21E 5.66E+09 T21S 5.93E+09 T21N 6.32E+09 I15W 9.15E+09 I15E 9.79E+09 H18W 1.03E+10 I15S 1.04E+10 H15E 1.07E+10 I15N 1.16E+10 H15W 1.16E+10 H20W 1.21E+10 H20S 1.34E+10 H18S 1.38E+10 T21W 1.43E+10 H18E 1.49E+10 H15N 1.54E+10 H15S 1.56E+10 7
NET-313-01P Panel Relative Dose, rads I16S 1.56E+10 H20E 1.59E+10 O7N 1.63E+10 O7W 1.70E+10 H20N 1.75E+10 H16W 1.82E+10 O7S 1.84E+10 O7E 1.85E+10 H21N 1.87E+10 H16S 1.87E+10 I16E 2.03E+10 I16W 2.03E+10 O14N 2.08E+10 O10S 2.11E+10 H16E 2.11E+10 O14S 2.15E+10 O10N 2.21E+10 R22S 2.23E+10 O14E 2.30E+10 R22N 2.41E+10 O10E 2.51E+10 S15S 2.58E+10 R22E 2.63E+10 O10W 2.72E+10 O14W 2.73E+10 R22W 2.74E+10 S15W 2.80E+10 P16W 2.84E+10 S15N 2.90E+10 P15W 2.92E+10 P15E 3.07E+10 S17W 3.12E+10 P16S 3.13E+10 P15S 3.14E+10 P15N 3.20E+10 S17N 3.21E+10 P16E 3.37E+10 N14E 3.44E+10 N14N 3.52E+10 Q16S 3.56E+10 Q16W 3.69E+10 Q16E 3.80E+10 8
NET-313-01P 2.3.2 Restricted Cells Two of the scanned cells in the Palisades racks are defined as restricted cells.
These cells were scanned for the purpose of establishing whether there was continuous absorber material present and whether there were any differences in the characteristics of these scans as compared with scans of unrestricted cells.
Table 2-3 shows the list of panels scanned under this condition.
Table 2-3 Panels Selected for Full Panel Characterization Only Panel Relative Dose, Rads M7E 1.30E+10 M7W 1.24E+10 M7N 1.43E+10 M7S 1.56E+10 Q8E 6.31E+09 Q8W 5.45E+09 There was no discernable difference in the shape or form of these panel scans as compared with scans of panels in unrestricted cells.
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NET-313-01P 3 BADGER Test Results The test results show that a large percentage of the panels tested had areal density values higher than the 0.0705 g B-10/cm2 areal density standard. Those panels that fell outside the range of areal densities represented in the calibration cell (see Table 2-1) are reported as having exceeded that value but do not have an exact value because of the inaccuracy associated with extrapolation. Those panels that fell within the range of areal density standards averaged 0.0515 g B-10/cm2. The following sections report the test results for the 95/95 lower limit of the panels tested, the full panel verification of the 6 panels from the restricted cells and the analysis results of the 60 tested panels, respectively.
3.1 Statistical Analysis of Test Results As mentioned in Section 2.3.1, the panels selected for testing reflected a RACKLIFE analysis of the relative absorbed gamma dose in those panels. The selection process was biased towards those panels that were likely to have experienced the highest in-service dose. This selection methodology presupposes that there is a correlation between absorbed dose and loss of boron carbide in the Carborundum plates. The existence of such a correlation cannot be established by the test results. However, dose is the only predictor that is available to establish a conservative bias in the selection process. Panel selection is assumed to be random in the absence of any relationship between gamma dose and reduction in areal density.
The results of the analysis have been considered as a bimodal distribution of panel areal density measurements. Panels that were determined to have an areal density greater than the highest calibration standard (0.0705 g B-10/cm^2) are all reported to be greater than or equal to that standard value. These panels represent the majority of the measurements (48 out of 60) and suggest that, nominally, 80% of the panels in the pool would exceed 0.0705 g B-10/cm^2. The remaining 20% of the panels measured, however, did show minimum effective areal density values between 0.0307 and 0.0645 g B-10/cm^2.
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NET-313-01P Legend:
Figure 3-4 Pool Map Showing Panels Analyzed and Calculated Areal Density 2 Green: > 0.06 gms B-10/cm N 2
Yellow: 0.04 - 0.06 gms B-10/cm 2
Red: < 0.04 gms B-10/cm 14
NET-313-01P 3.2 Full Panel Verification (Fast Scan)
Figures 3-5 through 3-10 show the scans of the panels from the two restricted cells. The scan information for each detector (count rate vs. elevation) is reported along with the uncertainty in each measurement. Scan information for detector 1 is omitted, as the detector was inoperable during the scan of these panels. The red line on each plot shows the count rate of the highest areal density standard (0.0705 g B-10/cm2). Values that fall below this line are likely, but not guaranteed, to have a higher areal density. Since areal density values are dependent upon the transmission ratio, variations in un-attenuated transmission across the cell might yield a count rate that is lower but a higher resultant areal density.
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NET-313-01P Figure 3-5 Full Panel Scan of Panel M7E 16
NET-313-01P Figure 3-6 Full Panel Scan of Panel M7N 17
NET-313-01P Figure 3-7 Full Panel Scan of Panel M7S 18
NET-313-01P Figure 3-8 Full Panel Scan of Panel M7W 19
NET-313-01P Figure 3-9 Full Panel Scan of Panel Q8E 20
NET-313-01P Figure 3-10 Full Panel Scan of Panel Q8W 21
NET-313-01P 3.3 Minimum Areal Density Spot Measurements Upon the completion of the Fast-Scan full panel characterization, the test engineer determined the region of the panel that had the highest count rate. A long count time neutron attenuation measurement was performed at that location. This measurement is then used to determine the areal density at that location. As such, the areal density values reported in Table 3-1 represent lowest areal density for that panel. There was some variability in panel count rates from point to point within each panel. This suggests that there is some variation, point to point, in areal density values for the Carborundum material. Table 3-1 shows the results of the areal density analysis on the panels tested. Both nominal and minimum areal density values are reported as well as comparison with dose.
Table 3-1 Panel Minimum and Nominal Areal Density Spot Measurements Nominal Minimum Equivalent Equivalent Panel Dose Areal Density Areal Density F9E 5.03E+08 > 0.0705 > 0.0705 T21E 5.66E+09 > 0.0705 > 0.0705 T21S 5.93E+09 > 0.0705 > 0.0705 T21N 6.32E+09 > 0.0705 > 0.0705 I15W 9.15E+09 > 0.0705 > 0.0705 I15E 9.79E+09 > 0.0705 > 0.0705 H18W 1.03E+10 0.0450705 0.0381352 I15S 1.04E+10 0.0700315 0.0635337 H15E 1.07E+10 > 0.0705 > 0.0705 I15N 1.16E+10 > 0.0705 > 0.0705 H15W 1.16E+10 > 0.0705 > 0.0705 H20W 1.21E+10 > 0.0705 > 0.0705 H20S 1.34E+10 0.0519 0.0404 H18S 1.38E+10 0.0426179 0.0343984 T21W 1.43E+10 > 0.0705 > 0.0705 H18E 1.49E+10 0.0356931 0.0307456 H15N 1.54E+10 > 0.0705 > 0.0705 H15S 1.56E+10 > 0.0705 > 0.0705 I16S 1.56E+10 > 0.0705 > 0.0705 H20E 1.59E+10 > 0.0705 > 0.0705 O7N 1.63E+10 > 0.0705 > 0.0705 O7W 1.70E+10 0.0530974 0.0446339 H20N 1.75E+10 0.0565 0.0466 22
NET-313-01P Nominal Minimum Equivalent Equivalent Panel Dose Areal Density Areal Density H16W 1.82E+10 > 0.0705 > 0.0705 O7S 1.84E+10 0.0631371 0.0532599 O7E 1.85E+10 > 0.0705 > 0.0705 H21N 1.87E+10 > 0.0705 > 0.0705 H16S 1.87E+10 > 0.0705 > 0.0705 I16E 2.03E+10 > 0.0705 > 0.0705 I16W 2.03E+10 > 0.0705 > 0.0705 O14N 2.08E+10 > 0.0705 > 0.0705 O10S 2.11E+10 > 0.0705 > 0.0705 H16E 2.11E+10 0.0625007 0.0559312 O14S 2.15E+10 > 0.0705 > 0.0705 O10N 2.21E+10 > 0.0705 > 0.0705 R22S 2.23E+10 0.0678549 0.0645084 O14E 2.30E+10 > 0.0705 > 0.0705 R22N 2.41E+10 > 0.0705 > 0.0705 O10E 2.51E+10 > 0.0705 > 0.0705 S15S 2.58E+10 > 0.0705 > 0.0705 R22E 2.63E+10 > 0.0705 > 0.0705 O10W 2.72E+10 > 0.0705 > 0.0705 O14W 2.73E+10 > 0.0705 > 0.0705 R22W 2.74E+10 > 0.0705 > 0.0705 S15W 2.80E+10 > 0.0705 > 0.0705 P16W 2.84E+10 > 0.0705 > 0.0705 S15N 2.90E+10 > 0.0705 > 0.0705 P15W 2.92E+10 > 0.0705 > 0.0705 P15E 3.07E+10 > 0.0705 > 0.0705 S17W 3.12E+10 > 0.0705 > 0.0705 P16S 3.13E+10 > 0.0705 > 0.0705 P15S 3.14E+10 > 0.0705 > 0.0705 P15N 3.20E+10 > 0.0705 > 0.0705 S17N 3.21E+10 0.0454037 0.0355146 P16E 3.37E+10 > 0.0705 > 0.0705 N14E 3.44E+10 > 0.0705 > 0.0705 N14N 3.52E+10 > 0.0705 > 0.0705 Q16S 3.56E+10 0.0636806 0.0607193 Q16W 3.69E+10 > 0.0705 > 0.0705 Q16E 3.80E+10 > 0.0705 > 0.0705 23
NET-313-01P The following figures illustrate some features of the plots contained in Appendix A. Because of problems with detectors 1 & 3 during the test campaign, only data from detectors 2 & 4 are reported. Figure 3-11 shows the count rate versus elevation for both detectors in blue. The red line, once again, represents the count rate associated with the highest areal density standard for each detector.
Finally, the crosshair symbols represent the elevation and count rate values for the two Slow-Scan measurements with long count times used to calculate the areal density for the panel. This value is reported in the heading of each plot and is an average of all four measured values.
Figure 3-12 shows the results for panel H18E. This plot is interesting in that the Slow-Scan count rate values deviate from the Fast-Scan count rate values for the same elevation. This is attributed to the collection of Fast-Scan data during the July campaign and the slow scan data in December. Differences in source strength and detector performance between campaigns contribute to these differences.
Figure 3-11 Results for Panel H15E 24
NET-313-01P Figure 3-12 Results for Panel H18E 25
NET-313-01P 4 Summary and Conclusions Sixty (60) panels of the Carborundum neutron absorber in the Palisades spent fuel storage racks were subjected to non-destructive BADGER testing to determine the areal density of the neutron absorber material. An additional six (6) panels were subjected to similar testing to establish the presence of absorber material. This test campaign was performed in December of 2008.
Areal density values were measured at the axial elevation in each panel where detector count rates were greatest as determined during a Fast-Scan of the entire panel. Accordingly, this should represent the lowest areal density in a given panel. Fourty eight (48) of the sixty (60) panels tested had an areal density value greater than 0.0705 g B-10/cm2. The remaining 12 panels had minimum areal density values between 0.0307 and 0.0645 g B-10/cm2. This subset of 12 panels was analyzed as a separate distribution. It was determined to be normally distributed to a high degree of confidence. A one-sided 95/95 analysis was also performed on the subset and the results showed that with 95% confidence, 95%
of this subset population (which represents 20% of the panels tested) will have areal density values above 0.0135 g B-10/cm2.
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NET-313-01P 5 References 1 BADGER, a Probe for Nondestructive Testing of Residual Boron-10 Absorber Density in Spent-Fuel Storage Racks: Development and Demonstration, TR-107335, Electric Power Research Institute: Palo Alto, California; October 1997.
2 MCNP Validation of BADGER, GC-110539 Electric Power Research Institute: Palo Alto, California; May 1998.
3 Email subject:Palisades Fuel Data, From Guy T. Wiggins (Palisades) to M.
Harris (NETCO) on 10/22/2008 27
NET-313-01P Appendix A
F9E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H15E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H15N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H15S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 0
ÅÅ 0 20 40 60 80 100 120 140
H15W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H16E @AD = 0.0625D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
H16S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 0
ÅÅ 0 20 40 60 80 100 120 140
H16W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H18S @AD = 0.0426D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
H18W @AD = 0.0451D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
H20E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H20N @AD = 0.0565D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅÅ 0
0 20 40 60 80 100 120 140
H20S @AD = 0.0519D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
H20W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 0
ÅÅ 0 20 40 60 80 100 120 140
H21N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I16E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I16S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I16W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 0
ÅÅ 0 20 40 60 80 100 120 140
N14E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
N14N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O10E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O10N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O10S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O10W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O14E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O14N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅÅ 0
0 20 40 60 80 100 120 140
O14S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O14W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O7N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O7W @AD = 0.0531D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
P15E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
P15N @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
P15S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
P15W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
P16E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
P16S @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
P16W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20 ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
Q16E @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
Q16S @AD = 0.0637D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
Q16W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
S17N @AD = 0.0454D 100 Det-2 CountRate, cps 80 60 40
ÅÅ 20 0
100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
S17W @AD = > 0.0705D 100 Det-2 CountRate, cps 80 60 40 20
ÅÅ 0
100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
T21N @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
T21S @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
T21E @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
T21W @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I15N @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I15S @AD = 0.0700D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I15E @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
I15W @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 Note: Full Panel Scan and Point Scans were Performed DuringÅ Å 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20 0
ÅÅ 0 20 40 60 80 100 120 140
H18E @AD = 0.0357D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
O7S @AD = 0.0631D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
O7E @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
R22N @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
R22S @AD = 0.0679D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20 ÅÅ 0
0 20 40 60 80 100 120 140
R22E @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
R22W @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140
S15S @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120
S15W @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20
ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120
S15N @AD = > 0.0705D 100 80 Det-2 CountRate, cps 60 40 20 ÅÅ Note: Full Panel Scan and Point Scans were Performed During 0
Different Campaigns and Should not Necessarily Overlap 100 80 Det-4 CountRate, cps 60 40 20
ÅÅ 0
0 20 40 60 80 100 120 140