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| number = ML090830548
| number = ML090830548
| issue date = 01/07/2009
| issue date = 01/07/2009
| title = Rancho Seco Final Status Survey Report for January 7, 2009, Cooling Tower Buffer (East), Survey Unit F8080033
| title = Final Status Survey Report for January 7, 2009, Cooling Tower Buffer (East), Survey Unit F8080033
| author name = Brown E L
| author name = Brown E
| author affiliation = Sacramento Municipal Utility District (SMUD)
| author affiliation = Sacramento Municipal Utility District (SMUD)
| addressee name =  
| addressee name =  
Line 17: Line 17:


=Text=
=Text=
{{#Wiki_filter:Rancho Seco Final Status Survey Summary Report January 7, 2009Cooling Tower Buffer (East)Survey Unit F8080033 Prepared By: t i z Date: C/7/2&o FSS Engineer Reviewed By: -44 I I 09 Lead FSS Engineer Approved By: -7 Date: -0 Dismantlement Superintendent, Radiological FINAL STATUS SURVEY  
{{#Wiki_filter:Rancho Seco Final Status Survey Summary Report January 7, 2009 Cooling Tower Buffer (East)
Survey Unit F8080033 Prepared By: t     z  i                   Date:         C/7/2&o FSS Engineer Reviewed By:       *      *Date:
                            -44                 I I 09 Lead FSS Engineer Approved By:       -7                     Date:     -0 Dismantlement Superintendent, Radiological
 
FINAL STATUS SURVEY  


==SUMMARY==
==SUMMARY==
REPORT Survey Unit: F8080033, Cooling Tower Buffer (East)Survey Unit
REPORT Survey Unit:
F8080033, Cooling Tower Buffer (East)
Survey Unit


== Description:==
== Description:==


Operating History:'The cooling towers and basins were part of the condenser coolingwater system.
Operating History:'The cooling towers and basins were part of the condenser cooling water system. The paved area comprising the basins was not reported to have been used for the storage of radioactive material. Operating records and the HSA document one event with the potential for a release of radioactivity associated with this survey area.
The paved area comprising the basins was not reported to have been used for the storage of radioactive material.
Site Characterization: Direct measurements were made of the exterior surfaces of the structure which confirmed the presence of plant-derived radionuclides. Direct structure measurements showed a mean gross activity level of 4,952 dpm/100 cm2 and a maximum value of 6,289 dpm/1 00 cm2. Based on the classification procedure (DSIP-0020) and levels of gross activity reported, the area was determined to be a Class 2 area.
Operating records and the HSA document one event with the potential for a release of radioactivity associated with this survey area.Site Characterization: Direct measurements were made of the exterior surfaces of the structure which confirmed the presence of plant-derived radionuclides.
HSA Events: PDQ-930036.
Direct structure measurements showed a mean gross activity level of 4,952 dpm/100 cm2 and a maximum value of 6,289 dpm/1 00 cm2. Based on the classification procedure (DSIP-0020) and levels of gross activity reported, the area was determined to be a Class 2 area.HSA Events:
Survey Unit Design Information:
PDQ-930036.
The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Direct measurement locations were determined using a random-start, fixed grid pattern and 1300 m2 were scanned for approximately 20% coverage. The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.
Survey Unit Design Information:The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment  
Page 2 of 7                         FSS Summary Report                             F8080033
: 1. Direct measurement locations were determined using a random-start, fixed grid pattern and 1300 m 2 were scanned for approximately 20% coverage.
 
The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.Page 2 of 7 FSS Summary Report F8080033 Table 1. Survey Unit Design Parameters Survey Design Parameter Value Comment Survey Area: F808 Cooling Tower Buffer (East)Survey Unit: 0033 Open Land Area Class: 2 LTP Table 5-4 SU Area (m2): 6481 Evaluator:
Table 1. Survey Unit Design Parameters Survey Design Parameter                 Value                       Comment Survey Area:                         F808   Cooling Tower Buffer (East)
Erin L. Brown DCGL Cs137 surrogate (pCi/g): 51.2 Area Factor: N/A Class 2 Design DCGLemc (pCi/g): N/A Class 2 LBGR (pCi/g): 25.6 Default = 50% DCGL Design Sigma (pCi/g): 0.92 LTP Table 5-4C, Rev. No. 1 Type I Error: 0.05 Type II Error: 0.05 Nuclide: Cs137 Sample Area (m2): 462.9 Class 2 Total Area Scanned (m2): 1300 Scan Coverage (%): 20.1% Class 2 1.645 ZI-P :1.645 Sign P: 0.99865 Calculated Relative Shift: 27.8 Relative Shift Used: 3 Uses 3.0 if Rel Shift >3 N-Value: 11 Design N-Value + 20%: 14 NUREG-1575 Table 5-5 Grid Spacing L: 21.5 Class 2 Page 3 of 7 FSS Summary Report F8080033 Survey Results: A total of 16 direct measurements were made in F8080033.
Survey Unit:                         0033 Open Land Area Class:                             2 LTP Table 5-4 SU Area (m2):                       6481 Evaluator:             Erin L. Brown DCGL Cs137 surrogate (pCi/g):                           51.2 Area Factor:                         N/A   Class 2 Design DCGLemc (pCi/g):                             N/A   Class 2 LBGR (pCi/g):                         25.6 Default = 50% DCGL Design Sigma (pCi/g):                         0.92 LTP Table 5-4C, Rev. No. 1 Type I Error:                         0.05 Type II Error:                         0.05 Nuclide:                       Cs137 Sample Area (m2):                       462.9   Class 2 Total Area Scanned (m2):                         1300 Scan Coverage (%):                         20.1%   Class 2 1.645 ZI-P :1.645 Sign P:                     0.99865 Calculated Relative Shift:                         27.8 Relative Shift Used:                             3 Uses 3.0 if Rel Shift >3 N-Value:                             11 Design N-Value + 20%:                               14 NUREG-1575 Table 5-5 Grid Spacing L:                         21.5 Class 2 Page 3 of 7                     FSS Summary Report                         F8080033
The results including mean,median, standard deviation and range are shown in Table 2. All of the direct measurements were less than the DCGL. All 46 ISOCS scans were less than or equal to the MDC values listed in Table 2-1.Table 2. Direct Measurement Results (all activity values in pCi/g)Measurement ID Cs137 MDA Cs137 Activity Uncertainty Mean: ~' K9.52E-01  
 
;K Median: 9.68E-01..
Survey Results:
Standard Deviation: , 3.63E-02 '>Range: 8.84E-01 to 1.OOEOO F8080033 A0009GD 9.04E-01 < 9.04E-01 F8080033 A0008GD 9.03E-01 < 9.03E-01 F8080033 A0007GD 8.97E-01 < 8.97E-01 F8080033 A0006GD 9.69E-01 < 9.69E-01 F8080033 A0005GD 9.36E-01 < 9.36E-01 F8080033 A0004GD 9.53E-01 < 9.53E-01 F8080033 A0003GD 9.63E-01 < 9.63E-01 F8080033 A0002GD 9.69E-01 < 9.69E-01 F8080033 AOOO1GD 9.93E-01 < 9.93E-01 F8080033 A0016GD 9.73E-0i < 9.73E-01 F8080033 A0015GD <9.80E-01 9.80E-01 F8080033 A0014GD 9.66E-01 < 9.66E-01 F8080033 A0013GD 1.00E00 < L.OOEOO F8080033 A0012GD 9.69E-01 < 9.69E-01 F8080033 A0011GD 9.80E-01 < 9.80E-01 F8080033 A0010GD 8.84E-01 < 8.84E-01 Page 4 of 7 FSS Summary Report F8080033 Survey Unit Data Assessment:
A total of 16 direct measurements were made in F8080033. The results including mean, median, standard deviation and range are shown in Table 2. All of the direct measurements were less than the DCGL. All 46 ISOCS scans were less than or equal to the MDC values listed in Table 2-1.
The survey design required 16 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 3. The sample mean and median values were less than the DCGL. The sample standard deviation was less than the design standard deviation so no additional samples were required.Page 5 of 7 FSS Summary Report F8080033 Table 3. Data Assessment Results Survey Results Parameter Value Comment Actual Direct Measurements (N): 16 Median (pci/g): 9.68E-01 Mean (pCi/g): 9.52E-01 Standard Deviation (pCi/g): 3.63E-02 Maximum (pCi/g): 1.OOEOO Sign Test Final N Value: 16 S+ Value: 16 Critical Value: 11 Sufficient Samples Collected:
Table 2. Direct Measurement Results (all activity values in pCi/g)
Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: N/A Class 2 Standard Deviation  
Measurement ID             Cs137 MDA                 Cs137 Activity     Uncertainty Mean:   ~'       K9.52E-01                               ;K Median:                                     9.68E-01..
<= Sigma: Yes Pass the Sign Test? Yes Reject the Null Hypothesis?
Standard Deviation:                                       3.63E-02   '>     ,
Yes The survey unit passes all conditions?
Range:                               8.84E-01 to 1.OOEOO F8080033 A0009GD               9.04E-01                     < 9.04E-01 F8080033 A0008GD               9.03E-01                     < 9.03E-01 F8080033 A0007GD               8.97E-01                     < 8.97E-01 F8080033 A0006GD               9.69E-01                     < 9.69E-01 F8080033 A0005GD               9.36E-01                     < 9.36E-01 F8080033 A0004GD               9.53E-01                     < 9.53E-01 F8080033 A0003GD               9.63E-01                     < 9.63E-01 F8080033 A0002GD               9.69E-01                     < 9.69E-01 F8080033 AOOO1GD               9.93E-01                     < 9.93E-01 F8080033 A0016GD               9.73E-0i                     < 9.73E-01 F8080033 A0015GD                                           <9.80E-01 9.80E-01 F8080033 A0014GD               9.66E-01                     < 9.66E-01 F8080033 A0013GD               1.00E00                     < L.OOEOO F8080033 A0012GD               9.69E-01                     < 9.69E-01 F8080033 A0011GD               9.80E-01                     < 9.80E-01 F8080033 A0010GD               8.84E-01                   < 8.84E-01 Page 4 of 7                       FSS Summary Report                             F8080033
Yes Page 6 of 7 FSS Summary Report F8080033 Survey Unit Investigations and Results: No investigations were required for either direct or scan measurements and no investigation results are reported.ALARA Statement:
 
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL (i.e. the survey unit average activity is less than the DCGL and the EMC criterion has been met), the ALARA criterion has been met.Changes in Initial Survey Unit Assumptions:
Survey Unit Data Assessment:
The survey unit was designed as a Class 2 land survey and the sample results are consistent with that classification.
The survey design required 16 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 3. The sample mean and median values were less than the DCGL. The sample standard deviation was less than the design standard deviation so no additional samples were required.
The variability of the survey results was less than thecharacterization data used for survey design. No potential areas of elevated activity were detected.Conclusion:
Page 5 of 7                         FSS Summary Report                         F8080033
The FSS of this survey unit was properly designed as a Class 2 survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scancoverage met the requirement of Table 5-6 of the LTP. All of the direct measurements were less than the DCGL. No investigations were required.The direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.It is concluded that survey unit F8080033 meets the release criteria of 1OCFR20.1402.
 
Page 7 of 7 FSS Summary Report F8080033 Attachment 1 Maps January 7, 2009 Survey Unit F8080033  
Table 3. Data Assessment Results Survey Results Parameter               Value           Comment Actual Direct Measurements (N):           16 Median (pci/g): 9.68E-01 Mean (pCi/g): 9.52E-01 Standard Deviation (pCi/g): 3.63E-02 Maximum (pCi/g):   1.OOEOO Sign Test Final N Value:         16 S+ Value:         16 Critical Value:         11 Sufficient Samples Collected:       Yes Maximum Value < DCGL:             Yes Median Value < DCGL:           Yes Mean Value < DCGL:           Yes Maximum Value < DCGLemc:             N/A Class 2 Standard Deviation <= Sigma:         Yes Pass the Sign Test?       Yes Reject the Null Hypothesis?       Yes The survey unit passes all conditions?       Yes Page 6 of 7                     FSS Summary Report                 F8080033
-0[0 a 681.3832E 1889250N T 6813873E 1889248N KEY PLAN 681.3454E I 89207N\I I IOOO~JEN 6813454E 1888915N 6813574E 1888915N 00 00 a a o 5 10 1520 23 SCALE METERS (9*IsmuoSACRAMENTO MUNICIPAL UTIULTY DISTRICT COOLING TOWER BUFFER GEN ARRGMT SURFACE AREA ESTIMATE F8080033-M1 FILE: B080Q3.02 RC OLE: 80&303X)2 PC RAYMOND 00 CI am KEY: PLANJ*1.1 0 In U 2.r RANOOM START POINT N E J,: >i>*~. K 7-77~L 25 6 SP. 0 22 m SACRAMENTO MUNICIPAL UTILITY DISTRICT-3..7 In.COOLING TOWER BUFFER GAMMA DIRECT MEASUREMENT LOCATIONS F8080033-M2 a A C A Vi I( P2)I )"AX 4- X N/
 
0 s 10 15 P0O 2 SCALE k9 mETERS&#xfd;71 00 00 Lu-* UI SACRAMENTO MUNICIPALUTILITY DISTRICT COOLING TOWER BUFFER GAMMA SCAN MEASUREMENT LOCATIONS F8080033-M3 FiLE: 80.80,0102 RC RAYMOND'OLE 80800302 PC RAYMOND Attachment 2 Instrumentation January 7, 2009 Survey Unit F8080033 Table 2-1. Survey Unit Instrumentation Detector Detector Serial Instrument Model No. MDC No.1.OOEOO pCi/g Cs-137 Inspector N/A 08051294 1.01E00 pCi/g Co-60 3.61E-01 pCi/g Cs-137 ISOCS N/A 1983920 2.65E-01.
Survey Unit Investigations and Results:
pCi/g Co-60 3.37E-01 pCi/g Cs-137 ISOCS N/A 2983947 2.50E-01 pCi/g Co-60 Table 2-2. Investigation Criteria and DCGL Instrument Parameter Value ISOCS Investigation Criteria -Scan 23 Cs-137 All DCGLw 51.2 Cs-137 12.6 Co-60 All DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8080033 Attachment 3 Investigation January 7, 2009 Survey Unit F8080033 (none required)
No investigations were required for either direct or scan measurements and no investigation results are reported.
Attachment 4 Data Assessment January 7, 2009 Survey Unit F8080033 rJ2 00 00 F8080033 Quantile Plot Cs137 DCGL = 51.2 pCi/g.5 0 1.020 1.000 0.980 0.960 0.940 0.920 0.900 0.880 0.860 0.968 0 20 40 60 Percentile 80 100 Activity -Median ---75th Percentile ----50th Percentile 4 (D*00 00 00 F8080033 Scatter Plot Cs137 DCGL = 51.2 pClIg 1.20E+00 1.a81 1OOE+00 __. _ _ __ _ __ _ .2.. mo -. 0.9520 0 00 S8.-E--1 -0.843 U 6.OOE-014.OOE-01 2.00E-01 0.OOE+000 Measurement Locations 0 o Activity -Average --"+3SIDev" ---3StDev 7 i Ct, C,)00 F8080033 Frequency Plot Cs1 37 DCGL = 51.2 pCi/g 6 0-0)U)U,-Q 0/5 3 2 1 04t Bins -Upper End Value (pCi/g)}}
ALARA Statement:
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL (i.e. the survey unit average activity is less than the DCGL and the EMC criterion has been met), the ALARA criterion has been met.
Changes in Initial Survey Unit Assumptions:
The survey unit was designed as a Class 2 land survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.
 
==
Conclusion:==
 
The FSS of this survey unit was properly designed as a Class 2 survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the direct measurements were less than the DCGL. No investigations were required.
The direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.
It is concluded that survey unit F8080033 meets the release criteria of 10CFR20.1402.
Page 7 of 7                         FSS Summary Report                             F8080033
 
Attachment 1 Maps January 7, 2009 Survey Unit F8080033
 
-0 a
[0 681.3832E 1889250N T     6813873E 1889248N KEY PLAN 681.3454E I89207N\
I I IOOO~JEN 6813454E                                         6813574E 00 00 1888915N                                          1888915N o 5 10 1520 23 COOLING TOWER BUFFER SCALE METERS       (9 a
a
                                  *Ismuo SACRAMENTO MUNICIPAL UTIULTYDISTRICT GEN ARRGMT SURFACE AREA ESTIMATE F8080033-M1 FILE: B080Q3.02                     RC RAYM*OND OLE: 80&303X)2                       PC RAYMOND
 
am KEY: PLANJ U
0 2.
In 00 CI
                                      *1
                                      .1 r
E RANOOM START POINT N
J,:         >i>*~.             K 7-77~
L 25 -3.
6 SP. 0 22 m                                         .7        In.
COOLING TOWER BUFFER GAMMA DIRECT MEASUREMENT LOCATIONS SACRAMENTO MUNICIPAL UTILITY DISTRICT F8080033-M2
 
a   P2)I Vi I( )
A C
A "AX 2203)'ZE*__
X4-N/
0 s 10 15 P0O 2 SCALE           k9
&#xfd;71 00                                                           mETERS 00 COOLING TOWER BUFFER Lu-UI             GAMMA SCAN MEASUREMENT LOCATIONS
* SACRAMENTO MUNICIPAL UTILITY DISTRICT F8080033-M3 FiLE: 80.80,0102                         RC RAYMOND' OLE 80800302                           PC RAYMOND
 
Attachment 2 Instrumentation January 7, 2009 Survey Unit F8080033
 
Table 2-1. Survey Unit Instrumentation Detector     Detector Serial Instrument     Model               No.                           MDC No.
1.OOEOO pCi/g Cs-137 Inspector     N/A           08051294                 1.01E00 pCi/g Co-60 3.61E-01 pCi/g Cs-137 ISOCS       N/A             1983920               2.65E-01. pCi/g Co-60 3.37E-01 pCi/g Cs-137 ISOCS       N/A             2983947               2.50E-01 pCi/g Co-60 Table 2-2. Investigation Criteria and DCGL Instrument           Parameter                             Value ISOCS     Investigation Criteria - Scan               23 Cs-137 All     DCGLw                                     51.2 Cs-137 12.6 Co-60 All     DCGLEMC                                         N/A Page 2 of 2                   Att. 2 Instrumentation                   F8080033
 
Attachment 3 Investigation January 7, 2009 Survey Unit F8080033 (none required)
 
Attachment 4 Data Assessment January 7, 2009 Survey Unit F8080033
 
F8080033 Quantile Plot Cs137 DCGL = 51.2 pCi/g 1.020 1.000 0.980 0.968 0.960 0.940
    .5 0
0.920 rJ2 0.900 0.880 0.860 0           20           40             60               80       100 Percentile Activity -     Median - - -75th Percentile - - - - 50th Percentile 00 00
 
4 (D*
F8080033 Scatter Plot Cs137 DCGL = 51.2 pClIg 1.20E+00 1.a81 1OOE+00     __.         _         _           __       ___    _   .2.. mo -. 0.952 0     0  00 S8.-E--1         -                                                             0.843 U
6.OOE-01
* 4.OOE-01 2.00E-01 0.OOE+000 00 Measurement Locations 7
o 0 Activity -   Average - - "+3SIDev" - - -3StDev i 00 00
 
F8080033 Frequency Plot Cs1 37 DCGL = 51.2 pCi/g 6
0-0) 5 U) 3 Ct, U,
    -Q 2 0/
1 04t C,)
Bins - Upper End Value (pCi/g) 00}}

Latest revision as of 08:47, 14 November 2019

Final Status Survey Report for January 7, 2009, Cooling Tower Buffer (East), Survey Unit F8080033
ML090830548
Person / Time
Site: Rancho Seco
Issue date: 01/07/2009
From: Ellen Brown
Sacramento Municipal Utility District (SMUD)
To:
NRC/FSME
Shared Package
ML090830613 List: ... further results
References
DPG 09-097, F8080033
Download: ML090830548 (18)
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Text

Rancho Seco Final Status Survey Summary Report January 7, 2009 Cooling Tower Buffer (East)

Survey Unit F8080033 Prepared By: t z i Date: C/7/2&o FSS Engineer Reviewed By: * *Date:

-44 I I 09 Lead FSS Engineer Approved By: -7 Date: -0 Dismantlement Superintendent, Radiological

FINAL STATUS SURVEY

SUMMARY

REPORT Survey Unit:

F8080033, Cooling Tower Buffer (East)

Survey Unit

Description:

Operating History:'The cooling towers and basins were part of the condenser cooling water system. The paved area comprising the basins was not reported to have been used for the storage of radioactive material. Operating records and the HSA document one event with the potential for a release of radioactivity associated with this survey area.

Site Characterization: Direct measurements were made of the exterior surfaces of the structure which confirmed the presence of plant-derived radionuclides. Direct structure measurements showed a mean gross activity level of 4,952 dpm/100 cm2 and a maximum value of 6,289 dpm/1 00 cm2. Based on the classification procedure (DSIP-0020) and levels of gross activity reported, the area was determined to be a Class 2 area.

HSA Events: PDQ-930036.

Survey Unit Design Information:

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Direct measurement locations were determined using a random-start, fixed grid pattern and 1300 m2 were scanned for approximately 20% coverage. The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.

Page 2 of 7 FSS Summary Report F8080033

Table 1. Survey Unit Design Parameters Survey Design Parameter Value Comment Survey Area: F808 Cooling Tower Buffer (East)

Survey Unit: 0033 Open Land Area Class: 2 LTP Table 5-4 SU Area (m2): 6481 Evaluator: Erin L. Brown DCGL Cs137 surrogate (pCi/g): 51.2 Area Factor: N/A Class 2 Design DCGLemc (pCi/g): N/A Class 2 LBGR (pCi/g): 25.6 Default = 50% DCGL Design Sigma (pCi/g): 0.92 LTP Table 5-4C, Rev. No. 1 Type I Error: 0.05 Type II Error: 0.05 Nuclide: Cs137 Sample Area (m2): 462.9 Class 2 Total Area Scanned (m2): 1300 Scan Coverage (%): 20.1% Class 2 1.645 ZI-P :1.645 Sign P: 0.99865 Calculated Relative Shift: 27.8 Relative Shift Used: 3 Uses 3.0 if Rel Shift >3 N-Value: 11 Design N-Value + 20%: 14 NUREG-1575 Table 5-5 Grid Spacing L: 21.5 Class 2 Page 3 of 7 FSS Summary Report F8080033

Survey Results:

A total of 16 direct measurements were made in F8080033. The results including mean, median, standard deviation and range are shown in Table 2. All of the direct measurements were less than the DCGL. All 46 ISOCS scans were less than or equal to the MDC values listed in Table 2-1.

Table 2. Direct Measurement Results (all activity values in pCi/g)

Measurement ID Cs137 MDA Cs137 Activity Uncertainty Mean: ~' K9.52E-01 ;K Median: 9.68E-01..

Standard Deviation: 3.63E-02 '> ,

Range: 8.84E-01 to 1.OOEOO F8080033 A0009GD 9.04E-01 < 9.04E-01 F8080033 A0008GD 9.03E-01 < 9.03E-01 F8080033 A0007GD 8.97E-01 < 8.97E-01 F8080033 A0006GD 9.69E-01 < 9.69E-01 F8080033 A0005GD 9.36E-01 < 9.36E-01 F8080033 A0004GD 9.53E-01 < 9.53E-01 F8080033 A0003GD 9.63E-01 < 9.63E-01 F8080033 A0002GD 9.69E-01 < 9.69E-01 F8080033 AOOO1GD 9.93E-01 < 9.93E-01 F8080033 A0016GD 9.73E-0i < 9.73E-01 F8080033 A0015GD <9.80E-01 9.80E-01 F8080033 A0014GD 9.66E-01 < 9.66E-01 F8080033 A0013GD 1.00E00 < L.OOEOO F8080033 A0012GD 9.69E-01 < 9.69E-01 F8080033 A0011GD 9.80E-01 < 9.80E-01 F8080033 A0010GD 8.84E-01 < 8.84E-01 Page 4 of 7 FSS Summary Report F8080033

Survey Unit Data Assessment:

The survey design required 16 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 3. The sample mean and median values were less than the DCGL. The sample standard deviation was less than the design standard deviation so no additional samples were required.

Page 5 of 7 FSS Summary Report F8080033

Table 3. Data Assessment Results Survey Results Parameter Value Comment Actual Direct Measurements (N): 16 Median (pci/g): 9.68E-01 Mean (pCi/g): 9.52E-01 Standard Deviation (pCi/g): 3.63E-02 Maximum (pCi/g): 1.OOEOO Sign Test Final N Value: 16 S+ Value: 16 Critical Value: 11 Sufficient Samples Collected: Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: N/A Class 2 Standard Deviation <= Sigma: Yes Pass the Sign Test? Yes Reject the Null Hypothesis? Yes The survey unit passes all conditions? Yes Page 6 of 7 FSS Summary Report F8080033

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL (i.e. the survey unit average activity is less than the DCGL and the EMC criterion has been met), the ALARA criterion has been met.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 2 land survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 2 survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the direct measurements were less than the DCGL. No investigations were required.

The direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8080033 meets the release criteria of 10CFR20.1402.

Page 7 of 7 FSS Summary Report F8080033

Attachment 1 Maps January 7, 2009 Survey Unit F8080033

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Attachment 2 Instrumentation January 7, 2009 Survey Unit F8080033

Table 2-1. Survey Unit Instrumentation Detector Detector Serial Instrument Model No. MDC No.

1.OOEOO pCi/g Cs-137 Inspector N/A 08051294 1.01E00 pCi/g Co-60 3.61E-01 pCi/g Cs-137 ISOCS N/A 1983920 2.65E-01. pCi/g Co-60 3.37E-01 pCi/g Cs-137 ISOCS N/A 2983947 2.50E-01 pCi/g Co-60 Table 2-2. Investigation Criteria and DCGL Instrument Parameter Value ISOCS Investigation Criteria - Scan 23 Cs-137 All DCGLw 51.2 Cs-137 12.6 Co-60 All DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8080033

Attachment 3 Investigation January 7, 2009 Survey Unit F8080033 (none required)

Attachment 4 Data Assessment January 7, 2009 Survey Unit F8080033

F8080033 Quantile Plot Cs137 DCGL = 51.2 pCi/g 1.020 1.000 0.980 0.968 0.960 0.940

.5 0

0.920 rJ2 0.900 0.880 0.860 0 20 40 60 80 100 Percentile Activity - Median - - -75th Percentile - - - - 50th Percentile 00 00

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F8080033 Scatter Plot Cs137 DCGL = 51.2 pClIg 1.20E+00 1.a81 1OOE+00 __. _ _ __ ___ _ .2.. mo -. 0.952 0 0 00 S8.-E--1 - 0.843 U

6.OOE-01

  • 4.OOE-01 2.00E-01 0.OOE+000 00 Measurement Locations 7

o 0 Activity - Average - - "+3SIDev" - - -3StDev i 00 00

F8080033 Frequency Plot Cs1 37 DCGL = 51.2 pCi/g 6

0-0) 5 U) 3 Ct, U,

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Bins - Upper End Value (pCi/g) 00

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