E910-05-025, Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area Survery Units OL11-1 and OL11-2, Appendix a
| ML051950122 | |
| Person / Time | |
|---|---|
| Site: | Saxton File:GPU Nuclear icon.png |
| Issue date: | 06/22/2005 |
| From: | GPU Nuclear Corp |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| E910-05-025 | |
| Download: ML051950122 (41) | |
Text
Appendix A (pages 1 to 9)
, I , - , , - I
.. SNEC CALCULATION COVER SHEET :
- Levi 2/Mns3.2S.CALCUDE5C,O p Revision Number - IEffective Date. Page Number Calculation Number 0 X I of 9 E900-05021 Subject - ;
OLII & Remaining OL12 Open Land Area - Survey Design Question I - Is this calculation defined as 'In QA Scope? Refer to definition 3.5. Yes 0 No .
Question 2- Is this calculation defined as a 'Design Calculation'? Refer to defriione 3.2 and 3.3. Yes ED No 13 Quality NOTES: If a Yes' answer is obtained for Question 1, the calculation must 'meetthe requirements of the SNEC Facility Decommissioning should not review the Assurance Plan. if a BYes answer-is obtained for Question 2, the Calculation Originatoes Immediate supervisor calculation as the Technical Reviewer.
DESCRIPTIONDOF REVISION
.at:
.--- SGNATURES ,._APPROVAL _ -.
Calculation OriginatorB.Bsyl Dt Technical Reviewer R.HlntrDate Additional Review -A.Paynteir! Date Additional Review Date,
SAC- .CALCULA1 M~4 SNEC N SilE TE A -
Calculation Number Revision Number Page Number E900-05-021 0 Page 2 of 9 Subject OLII & Remaining OL12 Open Land Area - Survey Design 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for the SNEC site area designated T 1OL1 I and a section of OL12 which resides outside .ofthe PENELEC Switch Yard. These areas are -13,352 square meters in total surface area, and are divided into three (3) - Class 2 survey units. This design applies only to open land areas. Additional designs. may be developed for structural surfaces as deemed appropriate by SNEC management. These areas are shown on Attachment 1-1.
1.2 OL1I is sub-divided into two (2) survey units while the remaining section of 0L12 (designated OL12-1) is one survey unit. These areas have the following individual surface areas:
- OL11-1, -5,000 square meters,
- OL11-2, -5,200 square meters, and
- OL12-1, -1,152 square meters 2.0
SUMMARY
OF RESULTS The following information should be used to develop a survey request for these survey units.
The effective DCGLw value is listed below for these survey units. The US NRC has reviewed and concurred with the methodology used to derive these values. See Attachment 2-1 through 2-3.
This mix is developed from samples taken from the OL1 area.
Table 1, DCGLw Values I Survey Units l Volumetric DCGLw(pClg-Cs-137) l All 3.22 (2.41 A.L.)
NOTE. A.L. is the site Administrative Limit (75% of effective DCGLw) 2.1 Survey Design 2.1.1 Scanning of soil (and fill materials) shall be performed using a 2":D by 2".L Nal detectorwith a Cs-137 window setting (Reference 3.1). The window shall straddle the Cs-137 662 keV full energy peak width (see typical calibration information on Attachment 3-1).
2.1.2 The instrument conversion factorlefficiency shall not be less than 206 cpm/uR/h -
2.1.3 Other instruments of the type specified in Section 2.1.1 above may be'used during the final status survey (FSS), but must demonstrate detection efficiencies at or above the value listed in Section 2.1.2.
Table 2, Soil Scanning Parameters MDCscan (pCug) - cs-I 3r Scan Speed (cmlsec) Maximum Distance from Surface Action Level % Coverage 100% Of 5.97 25 4' (gap between detector face & soil surface) > 350 gcpm Designated See Attachment
______ through 4-3 for actualGrids _ _
See Attachment 4-1 through 4-3 for actual calculations'
2.1.4 If a count rate greater than the action level of Table 2 is encountered during the scanning process, the surveyor should stop and locate the boundary of the elevated area. The surveyor should then mark the elevated area with stakes and/or other appropriate marking methods. To complete the investigation, sample elevated areas(s) 1AW SNEC procedure E900-IMP-4520.04 (Reference 3.2). and Section 2.2 of this calculation.
2.1.4.1 Class 2 soil should be scanned using a serpentine pattern that is -0.5 meters wide.
2.1.4.2 Scanning locations are randomly chosen on a per grid basis. Grids that can not be accessed should be clearly noted along with the reason for not completing the scan in that area. Scanning of partial grid areas is permitted with proper documentation.
2.1.4.3The minimum number of scan locations (-50% of each survey unit) are identified by the VSP computer program (Reference 3.3), and are listed in Table 3 (see Attachment 6-1). Additional randomly chosen grids are provided so that a 50% scanning goal can be reached even if some grid areas' (or grid sections) are deemed inaccessible. There is no need to scan these extra grid areas if the minimum scanning goal is attained (i.e., -50% coverage).
Table 3, Randomly Located Grids for Scanning Survey Unit Number of Grids OLI 1-1 25 (29 provided)
OL11-2 26 (30 provided)
OL12-1 < 6 (- 6 provided)
See Attachment 5-1.
2.1.5 The minimum number of randomly located sample points required for these survey units are listed in the following Table (see Compass output on Attachment 6-1 through 6-10). The surveyor should attempt to collect all samples listed below, but must collect the minimum values listed for each survey unit.
Table 4, Randomly Located Sample Points Survey Unit No. of Samples OL11-1 14 min. (17 provided)
OLI1-2 14 min. (17 provided)
OL12-1 14 min. (17 provided)
See Attachment 7-1 to 7-2.
2.1.6 Sampling depth should be 1AW Section 2.2.
1W ... .. . ' , ,
ZtNEC CALCULT. ' T -W Calculation Number Revison Number Page Number E900-65-021 0 Page 4 of 9 Subject OL1I & Remaining OL12 Open Land Area - Survey Design 2.1.7 Because the MDCscan (soil) is above the DCGLwc>_37. these Class 2 survey units are assumed to be Class 1 areas for purposes of data entry into the Compass computer program, thus forcing Compass to evaluate the number of samples based on the "Hot Spot7 design criteria (see Attachment 6-4 and 6-10).
2.1.8 VSP (Reference 3.3) is used to plot all scan and sample point locations in the included diagrams. The actual number of random start systematically spaced measurement points may be greater than that required by the Compass computer code because of any or all of the following:
.. placement of the initial random starting point (edge effects),
odd shaped diagrams, and/or
. coverage concems[Hot Spot design requirements 2.1.11 The starting points for physically locating sample sites in the survey unit are based on measurements from selected site grid pins (see Attachment 7-1 diagram).
Remaining soil sampling points are positioned using coordinates/measurements developed from these markers and the current site grid map.
2.1.12 Some sampling points may need to be adjusted to accommodate obstructions within these survey units. Contact the SR coordinator to report any difficulties encountered when laying out sampling points.
2.1.13 When an obstruction is encountered that will not allow collection of a sample, contact the cognizant SR coordinatorfor permission to delete the sampling point.
NOTE If remediation actions are taken as a result of this survey, this survey design must be revised or re-written entirely.
2.2 Sample elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2) and the following.
2.2.1 Collect a one meter deep sample at all locations.
NOTE Since the site surface dose model is 1 meter in depth, 1 meter deep samples must be collected to satisfy the initial sampling requirements of Section 2.1.5 (of this design).
Sections 4.2.3, 4.2.6 or 4.2.7 of site procedure E900-IMP-4520.04 are applicable when satisfying sampling requirements of this calculation.
2.2.2 Clearly mark, identify and document all sample locations.
2.3.1 As a part of the investigation process, sample any location that is above the action level cited is Table 2.
R SNEC CALCULATION SHEET.. -
Calculation Number Revision Number Page Number E900-05-021 0 Page 5 of 9 Subject OL1 I & Remaining OLI 2 Open Land Area - Survey Design
3.0 REFERENCES
3.1 SNEC Calculation No. E900-03-018, "Optimize Window and Threshold Settings for the Detection of Cs-1 37 Using the Ludlum 2350-1 and a 44110 Nal Detector", 8/7/03.
3.2 SNEC Procedure E900-IMP-4520.04, Survey Methodology to Support SNEC License Termination'.
3.3 Visual Sample Plan, Version 2.0 (or greater), Copyright 2002, Battelle Memorial Institute.
3.4 Compass Computer Program, Version 1.0.0, Oak Ridge Institute for Science and Education.
3.5 Plan SNEC Facility License Termination Plan.
3.6 SNEC Procedure E900-IMP-4500.59, 6Final Site Survey Planning and DQA'.
3.7 SNEC Survey Request No. SR-135, MA6 and MA7 Areas (now OL11), 6-10-04.
3.8 GPU Nuclear, SNEC Facility, 'Site Area Grid Map", SNECRM-020, Sheet 1, Rev 2, 1/29/03.
3.9 SNEC Calculation No. E900-03-012, Effective DCGL Worksheet Verification.
3.10 SNEC Procedure E900-IMP-4520.06, 'Survey Unit Inspection in Support of FSS Design'.
3.11 NUREG-1575, 'Multi-Agency Radiation Survey and Site Investigation Manual', August, 2000.
3.12 Microsoft Excel 97, Microsoft Corporation Inc., SR-2,1985-1997.
4.0 ASSUMPTIONS AND BASIC DATA 4.1 The Compass computer program is used to calculate the required number of random start systematic samples to be taken in the survey unit (Reference 3.4).
4.2 Characterization soil samples from this area are used as the initial estimate of variability.
These results are shown on Attachment 8-1. The grid locations where these samples were taken are also shown (Reference 3.7).
4.3 The MARSSIM Sign Test will be applicable for this survey design. No background subtraction will be performed under this criteria during the application of the DQA.
4.4 The number of points chosen by Compass are located on the survey map for the survey unit by the Visual Sample Plan (VSP) computer code (Reference 3.4).
4.5 Reference 3.5 and 3.6 were used as guidance during the survey design development phase.
4.6 Background in the OL11 area is less than 300 cpm (Reference 3.7). For purposes of calculating the MDCscan value used for planning purposes, background is assumed to be approximately 200 cpm.
4.7 The site area drawing used to determine the physical extent of the area is listed as Reference 3.8.
Calculation Number Revision Number Page Number E900-05-021 0 Page 6 of 9 Subject OLII & Remaining OL12 Open Land Area - Survey Design 4.8 Remediation History No significant remediation has occurred in the OL11 or OL12 areas with respect to open land area. Miscellaneous concrete structures in these survey areas will be addressed in a separate survey designs as deemed appropriate by SNEC management.
4.9 This survey design uses Cs-137 as a surrogate to bound the average concentration for all SNEC facility related radionuclides in the survey unit. The effective DCGLw is just the permitted Cs-137 concentration (6.6 pCilg) lowered to compensate for the presence (or potential presence) of other SNEC related radionuclides. In addition, an administrative limit (75%) has been set that further lowers the permissible Cs-1 37 concentration to an effective DCGLw for this radionuclide.
4.10 The sample database used to determine the effective radionuclide mix for the OL11 area has been drawn from samples that were assayed at off-site laboratories. This list is shown on.Attachment 2-2. The data shows Cs-1 37 to be the predominant radioactive contaminant found in these areas.
The decayed set of sample results were input to the spreadsheet titled 'Effective DCGL Calculator for Cs-137" (Reference 3.9) to determine the effective volumetric DCGLw values. The output of this spreadsheet is shown on Attachment 2-3.
4.11 The Nal scan MDC calculation is determined based on a 25 cm/sec scan rate, a 1.38 index of sensitivity (95% correct detection probability and 60% false positive) and a detector sensitivity of 206 cpmluRlh for Cs-137. Additionally, the detection system incorporates a Cs-1 37 window that lowers sensitivity to background in the survey unit.
4.12 The survey units described in this survey design were inspected by site personnel. A copy of portions of the SNEC facility post-remediation inspection report (Reference 3.10), is included as Attachment 9-1 to 9- -
4.13 No special area characteristics including any additional residual radioactivity (not previously noted during characterization) have been identified in this survey area.
4.14 The decision error for this survey design is 0.05 for the a value and 0.1 for the p value.
4.15 'Special measurements' (as described in the SNEC LTP) are not included in this survey design.
4.16 No additional sampling will be performed IAW this survey design beyond that described herein.
4.17 SNEC site radionuclides and their individual DCGLw values are listed on Exhibit 1 of this calculation.
4.18 The survey design checklist is listed in Exhibit 2.
4.19 Area factors are shown as part of Compass output (see Attachment 6-1).
5.0 CALCULATIONS 5.1 All calculations are performed internal to applicable computer codes or within an Excel spreadsheet.
6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey area OL11 & OL12-1 areas (in northwest quadrant of SNEC site).
6.2 Attachment 2-1 to 2-10 is the sample results from the OLI I site area including. In addition, the DCGL calculation sheets have been included.
6.3 Attachment 31, is a copy of calibration data from typical Nal radiation detection instrumentation' that may be used in this survey area (IAW Section 2.1.2).
6.4 Attachment 4-1 through 4-3, is the MDCscan calculation and supporting MicroShield output for volumetric materials.
6.5 Attachment 5-1, is the scan locations for the OL11 survey units.
6.6 Attachment 6-1 through 6-10, are Compass output for the OL11, and the 0L12-1 areas showing the number of required sampling points for these survey units.
6.7 Attachment 7-1, is the sample point locations with dimensions for each survey unit.
6.8 Attachment 8-1, is the soil variability results for selected soil samples from the OL11 area.
6.9 Attachment 9-1 to 9- Z ,is a copy of selected portions of the inspection reports for these areas.
Exhibit I SNEC Facility Individual Radionuclide DCGL Values (a) 25 mremly Limit 4 mremly Goal 25 mremly Limit (All Pathways) (Drinking Water)
Radionuclide Surface Area Open Land Areas Open Land Areas (b)
(dpn/100cm2 ) (Surface & Subsurface) (Surface & Subsurface)
(pCUg) (pCilg)
APn-241 2.7E+01 9.9 2.3 C-14 3.7E+06 2 5.4 Co-60 7.1 E+03 3.5 67 Cs-137 2.8E+04 6.6 397 Eu-152 1.3E+04 10.1 1440 H-3 1.2E+08 132 31.1 Ni-63 1.8E+06 747 1.9E+04 Pu-238 3.OE+01 1.8 0.41 Pu-239 2.8E+01 1.6 0.37 Pu-241 8.8E+02 86 19.8 Sr-90 8.7E+03 l 1.2 0.61 NOTES:
(a) While drinking water DCGLs Wfl be used by SNEC to meet the drinking water 4 mremly goal, only the DCGL values that constitute the 25 mremly regulatory limIt will be controlled under this LTP and the NRCs approving license amendment.
(b) Usted values are from the subsurface model. These values are the most conservative values between the two models (i.e..
surface & subsurface).
. 0 - `--' .- .- -
_SNEC CALCULATION. HEET Calculation Number Revision Number Page Number E900-05-021 0 Page 9 of 9 Subject OLI & Remaining OL12 Open Land Area - Survey Design Exhibit 2 Survey Design Checklist Calculation No. . Location Codes E900-05-021 OL11 & OL12-1 Outside the PENELEC Switch Yard_
Status Reviewer ITEM REVIEW FOCUS (Circle One) Initials & Date Has a survey design calculation numerGIbeen passigned? and Isa survey design summary L'Ill 1 descripbon provided? NI A b Are drawings/diagrams adequate for the subject area (drawings should have compass 2r r w n s da r m d q a e headings)?
Ai 17 a ns 3 Are boundaries properly Identified and is the survey area classification clearly indicated?
4 Has the survey area(s) been properly divided into survey units IAW EXHIBIT 10 ( WA 5 Are physical characteristics of the area~location or system documented? '1/,
6 Is a remediation effectiveness discussion included?Yes, PA Ao 7 Have characterization survey and/or sampflng results been converted to units that are comparable to applicable DCGL values? v_ 'a .o 8 Issurvey and/or sampling data that was used for determining survey unit variance included? W qig 9 Is a description of the background reference areas (or materials) and their survey and/or Yes, I/
sampling results Included along with a justification for their selection? esya_9 ' D 10 Are applicable survey and/or sampEng data that was used to determine variability included? es /A 11 Will the condition of the survey area have an impact on the survey design, and has the Yes probable impact been considered in the design? .S Has any special area characteristic including any additional residual radioactivity (not 1/
12 previously noted during characterization) been identified along with Its Impact on survey Yes,(6 ) .4, design? I 13 Are all necessary supporting calculations and/or site procedures referenced or included? N/A 14 Has an effective DCGLw been identified for the survey unit(s)?
15 Was the appropriate DCGLE,, included In the survey design calculation? qW 16 Has the statistical tests that will be used to evaluate the data been identified? (s/7/) W 17 Has an elevated measurement comparison been performed (Class 1 Area)? Yes, 18 Has the decision error levels been identified and are the necessary justifications provided? S NA '
19 Has scan instrumentation been Identified along with the assigned scanning methodology? ____ N_A
_/?
20 Has the scan rate been Identified, and is the MDCscan adequate for the survey design? N/A 21 Are special measurements e.g., in-siu gamma-ray spectroscopy required under this design. Yes, and is the survey methodology, and evaluation methods described? ________
22 Is survey Instrumentation caibration data included and are detection sensitivities adequate?
23 Have the assigned sample and/or measurement locations been clearly identified on a diagram A) Z/AA or CAD drawing of the survey area(s) along with their coordinates? ____ _._ _
24 Are investigation levels and administrative limits adequate, and are any associated actions N/A dearly Indicated?
25 For sample analysis, have the required MDA values been determined.? Yes,) q 26 Has any special sampling methodology been identified other than provided in Reference 6.3? Yes, NOTE: a copy of this completed form or equivalent, shall be Included within the survey design calu.'tion.
Appendix A (attachments 1-1 to 4-3) 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128
~~~14 14 147~14 14 14 14 14 13 13 13 13 13 13 3 3 3 3 2 2 BK -J-- A 9 9 9 9
- N, U I I
_. -4 I S* I I P mm
+(P U-OL8 I 9 L8 BJ B!
BH CO ICRETE BG BF
- 89 BE BD BC i-- BB
~~tOING UBSIATIO 18 4
'N K iF IL N
)L8 - K. I 1.10 H-9 (REM )VEDR)
He
- BA OF SU STATION TRUCTURl
-REIM
,AZ
- -1 F # REACMI AY _-
x I ~-(REMOVE EdlO E-8
) j SGS CSCKARGE TUNNEL
-1 AX.
AW.
- 5 ~aa ~t9 - O I I 1% I A - I(REOVE#r374 1 1 1X l'mrv-)
Attachment 1 -1
DCGL Calculation Logic - SNEC Facility Open Land Area OLI I Survey Units: SNEC Site survey unit named OL1I II.
Description:
The purpose of this calculation is to determine a representative isotopic mix from available sample analyses for the OLi I (and a section of the OL12) survey areas of the SNEC Facility site. The effective volumetric DCGLWs are then determined from the mean percent of applicable samples.
Ill. Data Selection Logic Tables:' The radionuclide selection logic and subsequent DCGL calculations are provided in five (5)tables. These tables were developed using Microsoft Excel. Table explanation is as follows.
Table 1: Raw Data Listing - This table provides a list of three (3)representative sample analysis results. Results are from scoping, and characterization survey activities of the OL11 site area. The samples consist of soil and sediment samples that were taken in support of the aforementioned activities. As applicable, a sample number, sample location/description, radionuclide concentration, and analysis date are provided for each sample. Positive nuclide concentrations are noted with yellow shaded background fields while MDA values are noted in the gray shaded fields.
Table 2: Reduced Data Listing of Positive Results, MDAs Removed - This table provides the best overall representation of the raw data from table 1.: Non-positive nuclide columns have been removed as well as all the MDA values leaving three (3)sample results. Thus, eleven (11) nuclides have been reduced to four (4)in this table.
Table 3: Decayed Sample List of Positive Results - This table decays the data from Table 2. Half-life values (in days) are listed above each respective nuclide column. Samples are decayed from their respective analysis date to March 15, 2005. Only positive results were decayed.
Table 4: Ratio to Cs-1 37 for Positive Sample Data - This table provides the calculation methodology for determining the surrogate ratio to Cs-137 for each radionuclide. From this information the mean, and mean % of total are calculated. The mean %of total values (normalized to 100%) are'then used to calculate the effective volumetric DCGLW per MARSSIM equation 1-14.
See Table 5. Note that the mean percent values were averaged using only the positive sample results in each column. Insome cases only a single nuclide value (e.g. Sr-90) had a positive result This value is listed as the mean value in"the tabulation. Therefore, this treatment results in a higher mean percent of total value for the mix, which is considered a conservative approach.
Table 5: Effective DCGL Calculator for Cs-137 (in pClg)- This table provides the surrogate volumetric modified Cs-137 DCGL0 calculation results from data derived from Table 4.
IV. Summary - The OL11 site'area is largely soils and or rock material thus the release limit is based on a volumetric DCGLW. Using the above dataselection logictables the calculated Cs-137 surrogate volumetric DCGLW is 3.22 pCi/g. This value is reduced by 25% as part of SNEC's commitment to apply an administrative limit as discussed in the License Termination Plan (LTP). Since positive sample result concentrations for Cs-137 are low in these open land areas, any ratios developed are influenced by background levels of other radionuclides such'as C-14. Thus this methodology is considered a conservative approach.
ATTACGHNENT - . , 1
_ LTABLE I - RAW DATA LISTING SIIECSanplello llo. LocaionDeser ppton H.] Sr-90 Co-60 Cs-137 Am-241 Pu-2lt Pu-239 Pu-241 C-14 1ii-63 Eu-152 Anasis Date SXSL17483 Tel. e S1507 1.3 Sal SR.164, 138 SP2 0111 <0.748 0.0771 < 0.0246 1.57 < 0.0174 < 0.0297 <0.0407 <3.17 0.362 1.9 <0.095 Septemberl5, 2004 SXSLOO87 Teledyne; L24414 L211S9-1 BF-.143, SURFAC1 OL11 < 2.04 <0.(333 <0.0165 1 2.34 1<0.01471 <0.00651 <0.0653 <2.11 <0.139 <18.4 <0.345 October 6 1999
. SXSL0089 Tel.dene;Lt1U5 BE.140 S1RFA01 OL11 <2.05 <0.035 <_0.0121 1.21 c<0.0136 <0.0326 <0.023 <1.42 <0.114 <16.2 <0.028 October6 1999 KEY
. [.Yellow Shaded Background
- Positive Result
. jGray Shaded Background. MDA TABLEI 'REDUCED DATA LISTING OF POSITIVE RESULTS. MDAs REMOVED SIIEC Samplo LAD lo. LocatoniDecripton Sr-90 CsI37 C44 111-63 Analysis Date SXSLOO87 Teledyne;L21441-4&L21898-1 l F-143, SURFA01i,011 l 2.34 l October 6, 1999 SXSLOOB9 l Teledyne; 121441-5 BE-140,SURFA01,o1-1 1.21 October 6, 1999 SXSL7483,. Teledyne,L25070.1.3 S.oSoISR-164 8G-138,SP20OL11I.0.0771 1.57 0.362 1.9 September 15,2004
--TABLE 3 - DECAYED SAMPLE LIST OF POSITIVE RESULTS I T I/2(d) -
-110446.15l 11019.5925 2092882.51 36561.5251 1 3/15/2005 I lSIIEC Smple li LAB llo. Locatlon/Deicriptlon Sr-90 Cs-I37 . C-14 111-63 Elapsed (d) Analysis Date SXSLOO87 lTeledyne; 121441-4 &L21898.1l EF-143,SURFA01,0111 l 2.065 l l 1987 October6, 1999
--- SXSL0089 . Teledyne;121441-4 .. -BE-140;SURFA01i,0L11 . . . 1.068 - I - 1987 1 October6,1999 l- SXSL7483. TeledyneL25070-1-3 Soil SR-164; O-138 SP2,0111 0.076-- 1.552 l0.362 l1.893 181 September 15 2004 TABLEI4RATIO TO Cs-13T FOR POSITIVE SAMPLE DATA' SIIEC SaMole lHO LAB 110. Locatlonbeiscriptlon Sr-90 Cs-,I37 C-I 4 111-63 Analysis Date SXSLO007 Teledyne; L21441-48 L21898-1. EF-143 SURFA0111I l 1 . _ l October 6, 1999 SXSLOO89 Teledyne; L21441-5 BEAI 40, SURFA01,O11 lO-II 1 _ l l October 6, 1999 l SXSL7483 Teledyne_ L25070-3 Soil SR-184,80-138,SP2 011 0.049 1 0.233 1.220 September 15, 2004 Average-> - 0.049 1 0.233 1.220 2.502
_ormalized to 1OO%=5 1.96 % 39.97% 9.32%. 48.75%o100l00*"O0t ATTACHMENT 2 --- 2 2
Table 5 I
ATTACMENL2 3 3
I I 2350 INSTRUMENT AND PROBE EFFICIENCY CHART 02/22/05 Added 2350-1 #126218 with 43-68 #095080 and 2350-1
- 126188 with 43-68 #099186. Returned from DURATEK following calibration. Typical - 2" by 2" Nal (w) Inst. Response Inst.# C Due AP # - Probe .Cal.Due cpnhmlmR/h 95361 6/25/05 P&W 25686 Pk 6/28/05 211,799 960.20/5 j.... G&WV.:.. ..... J196022 Pk .1 2/01/05 ......... -204,60.
98642 9/28/05 B&W ._-_._ -85844 Pk 9/28/05 209,771 98647 1/02/05 G&Y .211667 Pk :.1/02/05 213,180 117566 01/05/06 ROR . __. 402PK -: 01/13/06 205411 117573 _5/18/05. O&&Y . 211674Pk 5/18/05 212,173 2--/5:
-. ,0 . ')A 129407 12/17/05 White . 206280- 12/17/05 222,724 129423 5/18/05 P &Y = 211687.Pk- 5/18/05 .213,539 129440.:1A1/01/05 : O &W.. ; .210938.-Pk, 11/01/05.
-. ....;: . . .196,636. .
126198 11/2 205 R&..W- 196021'. 1/22/05 210398 DM== bo Cal. Die I Cesi= only. inhm (lOmV to 100)
-ATTAC-HMEN EN.T
MicroShield v5.05 (5.05-00121)
GPU Nuclear
- 1 File Ref.:
ile: SOILMS5 Date:
ate: March 29, 2005 By:
me: 3:38:06 PM Checked:
n: 00:00:03 Case
Title:
Soil
Description:
Soil Density 1.45 glcc, 6" Deep Cylinder @ 4" from Surface Y Geometry: 8 - Cylinder Volume - End Shields t
Source Dimensions Height 15.24 cm 6.0 in Radius 28.21 cm 11.1 in Dose Points X Y z
- 1 O crr n 27.94 cm 0 cm 0.0 irI 11.0 in 0.0 in Shields Shield Name Dimension Material Density Source 3.81e+04 cm3 Concrete 1.45 Air Gap Air 0.00122 Source Input Grouping Method: Actual Photon Energies Nuclide curies becquerels uCi/cm3 Bq/cm3 Ba- 137m 5.2264e-008 1.9338e+003 1 .3717e-006 5.0753e-002 Cs-1 37 5.5247e-008 2.0441 e+003 1.4500e-006 5.3650e-002 Buildup The material reference is: Source Integration Parameters Radial 60.
Circumferential 60 Y Direction (axial) 60 Results.
Energy Activitv Fluence Rate Fluence Rate Exposure Rate Exposure Rate MeV photons/sec MeVlcm2/sec MeVlcm 2 lsec mRlhr. mR/hr No Buildup With Buildup No Buildup With Buildup 0.0318 4.003e+01 6.785e-06 8.211e-06 5.652e-08 6.840e-08 0.0322 7.386e+01 1.305e-05 1.589e-05 1.050e-07 1.278e-07 0.0364 2.688e+01 7.222e-06 9.4286-06 4.103e-08 5.357e-08 0.6616 1.740e+03 5.968e-02 1.023e-01 1.1 57e-04 1.983e-04 TOTALS: 1.881 e+03 5.971 e-02 1.023e-01 1.159e-04 I1.986e-04 ATTACMMET */J
Nal Scan MDC Calculation- CV Soi.mcd Nal Scan MDC Calculation b := 200 p := 0.5 HS d := 56.42 SR:= 25 d := 1.38 Conv := 206 MS output := 1.157 HS d
- = 2.257 ObservationInterval (seconds)
SR HSd ObservationInterval (seconds) oi: SR .
(b.oi) b6:=
60 b i = 7.523 Counts MDCR i : (d4b) -60 MDCR i = 100.629 net counts per minute MDCR ;
MDCR surveyor :=
MDCR suveyor = 142.311 net counts per minute MDCR surveyor MDER :=
Convy.
-MlDER= 0.691 MDCscan Ms oupu103
- MS output 1 1 MDC scan = 5.971 pCi/g scanK.
4 of 5 3127t2005 3R27R005 4 of 5 aTTAr. NT 9
Nal Scan MDC Calculation- CV Soil.mcd where:
b = background in counts perminute by = background counts in observation interval Conv - Na! mamifacturersreportedresponse to energy of contaminant(cpmluR/h) d = index of sensitivity (Table 6.5 MARSSIM), 1.38 = 95% ofcorrectdetection's, 600/ofalse positives HSd = hot spot diameter (in centimeters)
MDCSC4 ,, = Minimum Detectable Concentrationforscanning (pCi/g)
MDCRi;=Minimum Detectable Count Rate (ncpm)
MDCRW,¢,,= MDCR correctedby human performancefactor(ncpm)
MDER = Minimum DetectableExposure Rate (uR/h)
MSWy =MicroShieldoutput exposure ratefor I pCi/g of contaminant(mRIh)
O = obervationInterval (seconds) p = human performancefactor SR = scan rate in centimeterspersecond
-NOTE This is an example of an MDCscan calculation that is valid for a specific set of site conditions, and assumptions. These variables include the computer model used, soil density, soil moisture content, surveyor efficiency, ground cover,'soil background radionuclide conten't and other variables that'influerice calculated results. However, this scan'MDC has been deemed appropriate for initial survey planning purposes at this site location.
3/2712005 5 of 5 ATrAU- -3.
Appendix A (attachments 5-1 to 9-2) 147 146 145 144 143 142\N,141 140 139 138 137 136 135 134 133 132 131 130 129 128 I I T ., I ILT -I I.1-1-iI-4 I lT I I I I I I BK z 4/
'J.I II JI -I171 .1'1 1 I L I MI \
7/
OU8 OL8 BJ Bl BH I-.
BG ~
A 9o RETE -
-X -
_~~~~~- - - .- t;BQ1tIt BF L_ #89C BE I- OSLO2 Il BD -.
.. BC FIF
/
.: .'BB BA
)L8- z I I 1.10 Kg (REM~ WED ,_
go ILE
_- PERIMET R OF SUB ATtONr IUCJRE AZ -
- - -L T -e - x--f1 xtx 9x AY - - - 1--#REACTO u
- SPILLWAYX II1 AX ~_ - 1 1 .. _GS-DI AREluNNEL ,S
. 1/1 - -
1AF#~39 - --
AW f-1X , I A I I (REM4vE#374 C4 TLE184 ATTACHMENT 5 -1
Site Report Site Summary Site Name: OL11, Open Land Area Planner(s): BHB Contaminant Summary NOTE: Surface soil DCGLw units are pCig. 2 Building surface DCGLw units are dpmrl/O crn .
Screening 2
Contaminant Type DCGLw Value Used? Area (M ) Area Factor Cs-137 Surface Soil 2.41 No 10,000 1 2,500 2.3 400 3 100 3.6 25 4.7 1 28.7
%vUMrA~a V1I.U.U 312912005 Page 1
Surface Soil Survey Plan Survey Plan Summary Site: OL1 1, Open Land Area Planner(s): BHB Survey Unit Name: OL11-1, Open Land Area Comments: Class 2 Area Entered as Class I Area (M 2 ): 5,000 (Classification: 1 Selected Test: Sign EEstimated Sigma (pCi/g): 0.468 DCGL (pCilg): 2.41 3ample Size (N): 14 LBGR (pClg): 1.7 EEstimated Conc. (pCi/g): 0.6 Alpha: 0.050 E-stimated Power. 1 Beta: 0.100 E-MC Sample Size (N): 14 Scanning Instrumentation: 2" by 2" Nal (w)
Prospective Power Curve 5.:1 t os ii _
_ 0.8
-I - - ________ -
C
- 0.7 Z.-
-I - -
t 0.6
-I _______ - - -
- 0.5 -I --
0.4 -1 _____ -- -
-9
--I _____ -- -
E 0.3
-C -'I ________
-& 0.2
-I --
E 0.1 I_ 0
-i -- - ________
0.5 1.0 1.5 2.0 2.5 3.0 Soil Concentmid on (pCig), inchain btackgrnud
- Power - DOGL - -EstimatedPower
- LBGR a l-beta A.
COMPASS vl.0.0 312912005.; Page 1 ATrACKMENi Ai. -,
Surface Soil Survey Plan Contaminant Summary DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pCilg) Contaminant Ratio (pCIg) (pCilg)
Cs-137 2.41 N/A NlA NIA 5.971 Survey Unit Estimate Reference Area Estimate (Mean t 1-Sigma) (Mean t 1-Sigma)
Contaminant , (pCUg) (pC1g)
Cs-1 37 0.641
- 0.468 0.28 i 0.39 onunse~e.....---------
SIuffrA.%Z V-.U.U 3J2912005 Page 2 A *A R .rACR-N5T
,'A .. .- . I&
.V
- 3
. ; .-.' = -
xI 41-No I- MailMM11 additional samples are required because son (EMC) the actual scan MDC isless than the required scan MDC. ing instrumentation used. Then enter a scan MDC for each ALCULATE button to viewthe integrated survey design l
l LXK} scan MDC and DCGL units are in pCi/g.
Scanning Instrumentation
Description:
12iby 2' Nal (w)
. -Enter Scan MDC I Contaminant I Scan MDC I Cs-1 37 5.971 NUREG-1507 NScan tidC: C ]
s.,
CTE Statistical Design Hot Spot Design N: 14 ActualScanMDC. l 5.971-Bounded Area (m): f 357.1 Area Factor l N/A Area Factor. 3.09 Bounded Area (m): FT/A DCGLw. 2.41 Post-EMC N: l 14 Scan MDC Required: 7.4
- i. r7 Enable Training Card Help ACK NEXT l.0.0- -
- Atl AC I NT ' L
Surface Soil Survey Plan Survey Plan Summary Site: OL1 1, Open Land Area Planner(s): BHB Survey Unit Name: OL11-2, Open Land Area Comments:
Area (m2 ): 5,200 Classification: 2 Selected Test: Sign *Estimated Sigma (pCi/g):. 0.468 DCGL (pCVg): 2.41 Sample Size (N): 14 LBGR (pCilg): 1.7 Estimated Conc. (pCi/g): 0.6 Alpha: 0.050 Estimated Power 1 Beta: 0.100 Prospective Power Curve
- I 1 __
V..
_* 0.8 -1 ________ ______ _________
't 0.8 1 ________
'-cg 0.7 * -I t 0.6
-I - -
ci 0.5 0.4
-I ________ ______
-i
-I r 03 -I________
~-0.2
-I - -
!: 0.1 -I________ ___________ _________ ____________
&. 0 0.5 1.0 1.5 . .2.0 2.5 3.0 Soil Concenlrtion IpCifg), ilding background
- Power - DCGL - - Estmated Power
- LEGR .8 1beta COMPASS vl.0.0 3.2912005 Page 1
- .i (;KM44
Surface Soil Survey Plan Contaminant Summary DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pCI~g) Contaminant Ratio (pCUg) (pCig)
Cs-1 37 2.41 N/A N/A NIA NiA Survey Unit Estimate Reference Area Estimate (Mean t 1-Sigma) (Mean t 1-Sigma)
Contaminant (pCIlg) (pCI/g)
Cs-1 37 0.641 +/- 0.468 0.28 +/- 0.39 UIMrAb Y1.U.U . 3/2912005 Page 2 A,
CIAC'rf1fiE AT .1 .e _. .;_
=.
Site Report Site Summary Site Name: OL12, Open Land Area (OL12-1)
Planner(s): BHB Contaminant Summary NOTE: Surface soil DCGLw units are pCVg. 2 Building surface DCGLw units are dpmlO00 cm.
Screening -
Contaminant Type DCGLw Value Used? Area (m') Area Factor Cs-137 Surface Soil 2.41 No 10,000 1 2,500 2.3 400 3 100 3.6 25 4.7 1 28.7 COMPASS v1.0.0 312912005 Page 1
- s A
- -AC WEi iz.: _
Surface Soil Survey Plan Survey Plan Summary Site: OL12, Open Land Area (aL1 2-1)
Planner(s): BHB Survey Unit Name: OL12-1 Comments: Class 2 Area Entered as Class 1 Area (M 2): 1,152 Classification: 1 Selected Test Sign Estimated Sigma (pCig): 0.468 DCGL (pCig): 2.41 Sample Size (N): 14 LBGR (pCig): 1.7 Estimated Conc. (pCilg): 0.6 Alpha: 0.050 Estimated Power. 1 Beta: 0.100 EMC Sample Size (N): 14 Scanning Instrumentation: 2" by 2" Nal (w)
Prospective Power Curve
- Is 0.9 _- _
_ 0.8 C
- 0.7 -I - -
cI
_ 0.6
-I ________ ___________ ______ ____________
Er 0.3
-I - -
-t ________ ___________ ____________
-I ________ ___________ - - - ___________
.60.4
- . 0.3 -I ________ ___________ ____________
5-0.5 1.0 1.5 2.0 2.5 3.0 Soil Conientration lsCilg), nchldbg bakground
- Power - DCQ. -
mn Estimated Power
- LBGR a I-beta OVMPAbS V1.U.U 312912005 Page 1
'-' A1fTAC . T 4
Surface Soil Survey Plan Contaminant Summary DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pCIl9) Contaminant Ratio (pCig) (pC11g)
Cs-137 2.41 N/A N/A N/A 5.971 Survey Unit Estimate Reference Area Estimate (Mean +/- 1-Sigma) (Mean +/- 1-Sigma)
Contaminant (pCilg). (pCUg)
Cs-137 0.641 +/- 0.468 028 +/- 0.39 LUMPASS V1.0.0 3129/2005 Page 2
. AT -M ,, N....:....
E I 2 j
. li'--'l,-,-'-.,.Z:7-",',,-,""i'..'--".":-- Nobdtional samples are requed because ison (EMC)
K) the dual scan MDC isless than the requked scan MDC ing instrumentation used. Then enter a scan MDCfor each ALCULATE button to viewthe integrated survey design II- K i scan MDC and DCGL units are inpCi/g.
Scanning Instrumentation
Description:
12' by 2' Nal (w)
..g Contaminant Scan MDC FEnter Scan MDC Cs-1 37 5.971 C -. [-NUREG-1507 I. crn .1C : _ l:_ __ I Statistical Desian -Hot Spot Design N: l 14 Adual Scan MDC: 5.971 Bounded Area (m): 82.3 ArealFactor l N/A Area Factor. 3.86 Bounded Area(mr): l N/A DCGLw. 2.41 Post-EMCN: 14 Scan MDC Required: l 9.3 F Enable Training Card Help 2
BACK NEXl v1.0.0 . .
- A7 A...C?$ .,..,
_t Z-
147 146 145 144 143 142 ,,141 140 139 138 137 136 135 134 133 132 131 Il I IOLI1 & 02424 SuAive Aeal I' I BK BJ 1 1i 16 B1
.IDL11 *1 .11-2 BH
--4h Xl rk t i3,1 I
1 7?
.I . t14 , __ ,j i .4 .m , 8 M.i BG .1~~
T r-r I ~ ~
,-/ [\.T'V II .8-i-I
+
I-7 II.,
10 "BG-131 4' 2 -d v, BF BE 81. 9
- 16. m 2 -141 , 2( A3m ,..
AY r I -V .9nm I I 1 IY-I%. 7 71 ATTACHMENT % . i
I S.- - No.. Gil
.. , pR3 - .- . j-.
Sanvbl No. Grid pCVg (C4-13T XSL6066 BF-144, SPA 0.4 XSL067 Bf-144 SP42 0.2 XSL6068 lF t44, SP 1 XSL6069 l BF14, SP4 0.86 XS16070 1 0.86 XSLSO7I 8F.144, SP-5 0.95 KSL607 SF-143 SP-1 0.24 KSLtO73 BF-143, SP-2 0.4 iXSL074 SBFt43. SP4l 2 iXSL075 SBF443, SP-4 08 XSLO75 SBF443, SP-4 0.5 XSL8077 B0-140, SP-1 0.23 XSL6078 BO-140, SP-2 0.1 x5W7 80-140,:SP-3, 0.
_iBW40W SP4 0.65
, BD-t40. SP-5 7i7v:KiP777
.BD-146, SP-1 0-27 B0-145, SP-t 0.4 iB-146. SP-2 0.16
_BE-t46 SP-1 A .5 7 -46, SP-2 0.4 YiX L60E AAR SP-t
- 0.2 0.3 F.146, SP-2 XSL6089 XSL6090 0-4 1.3 XSL6091 -14 1.5
,XiL609 -14 0.6 XSLam -14 0.12 XSL6094 1-144 0.9 xsLoM 1-144 0.8 I
1 0.4 0.55 082 1.2 1.8 0.4 0.36 1 0.4
-0.13 -
,-t 1.1
. 1 1.9 XSLe333 G-t42. SP-1 *I1.9 SXSL6334 B8-142, SP-2 0.29 SXSWB335 8-141 SP-1 0.4 SXSLX336 BG-141, SP-2 0.3 SXSL6337 8G-t40, SP-l I SXSL6338 8G-140. SP-2 0.53 SXSLS33 SF-141, SP-1 1.4 SXSL640 BF.14, SP-2 1.3 EXSL6341 SBF140, SP-1 0.6 SXSL342 BF-l, SP-2 0.7 SXSLiO343 BE.140. SPA 0.2 SXSL344 BE.-140. SP-2 1.3 SXSL345 BE-139. SP-1 0.42 SXSL6346 BE-39. SP-2 0.5 SXSLtI47 BC5141. SP-1 0.1 SXSiL348 BC.141. SP-2 0.12 SXS8LO349 Bt140. SPA 0.8 SXS12350 BC-140. SP-2 0.94 SXSLS31 BD-139. SPA 1.2 SX-SL8352 BD-139. SP-2 1.6 SXSL8353 SC-139. SP-1 1.2 SXSL6354 BC-139. SP-2 0.45 SXSL635E BF-144, L2 -CQ08 SXSL3 BF-144, L21 14 SXSL6357 SF.144. 21.'i at
____ WEA
- 9,!e41
-, 9AOM Attachment 8-1
7 17-948 -3878} .. . p.lI Apr 06 05 02: -2Gp Saxton/GPUN Exhlbtt I Survey UntIne!viction Check Sheet ORIGINAL:
.ECTON 1- SiURVEY iUNlrTlNPECTION DESCRIPTION -u -- ;
Survey Unit # OL1 1 Survey Unit Location Northwvest Open Land Area Date 415105 Time 1230 l Inspection Team Meembers l.Sarge
-SECTION 2 - SURVEY UNIT INSPECION SCOPE Inspection Requirements (Check the appropriate Yes/No answer.) Yes No N/A 1 Have ututlclent surveyt (i e.. post remediatiin, chractafatbon. etc )been obtained lor the survey urMit7 x l
- 2. Do the surys (from Question 1)demonstrate that the survey unruwil most dikoy jpaiathe PSB7 X
_s the physical work (i... remeciation a houeekeepnag) mior rotna the zrvey unit corplete? tX 4 tHave all fools, non.permeent eqvlpmont. and tnatorefl not needed to perfoem the rc, been removedr? X S Are the survy sltcve retlath'elfV rrce of tomciefs(1e din. certem dust. metl fittings etc 3f X
- e. Are the swveysuLcrselativerylree otfiquds (i.e.. water mclue.ot. etc,)7 X
- 7. An tna survey turface. oree of a paint. which has Iih potentiat to shiild radiation7 x
- 8. I laeethe 5urt.ce Mcasuremont Test A3eas (SlM-A) boen e4tabtoshed? (Reter to Exhib 2 fot instructon5s) x 9 Have the Surtce tMeasuroment Tt Area (SUTA) data b"n ected7 (Refer to Exhlt 2 ro Instructions) X
'. Ame the survey surfaces easily accessile? (No scatfoding. hrgh reacn. etc. is needed to perorm the FS 6) X it. is Uhtung adequate to perform tne FSS? X f 2It the aroa inductrnolioWe to perform tho FSS7 CEvatuafe poten!l falW trip hararda. conthred spaces. etc.) X -
13 Have cthtooraelhs been taken showinct the overall condrtlon of the wea7 - x Havd altunsttsatctory condatiaz bean resotved? lX NOT!: If a fo answar h obtained above, tho inspeCtOr should t ieedlate Corr ect the problem or ile toq ctetive Octions thmough the rnporib.e asi department, as applicable Document actions taken and/or jualiltcatlons In the *Comments section belovy. Attach additlonal sheats as necmary.
Comments i Survey Unit In5pector (print/sign) D. Sarge I lV _r-' Date l4/605 Survey Designer (print/sign) I3 / 3 1 Datl Llftb I 5
%J - I,. . - .1 nltrztm .le C% -T -', 1-l ...
-- ... .- - - - -1 1-1, I-
z s S05 0 2 : 2 6 p Saxton/GPUNM 71717 -948O8878 ,.2 8urvevILUnntt Uhti Cec heetA L ioedtlon Check Sheet ' .
... - -.... SECTION 1 - SURVIY.I NrIN!IPECTION DESCRIPTION .
OL12 Survcy Unit Location I Norlhwest Open Land Area.Switcthyar iett0l 4115 Time I 1245 Iinspection Team Membeir D.Samge SECTION 2- SURVEY UNITINSPECTION SCOPE Inspcctbon Rcquircmcnts (Check the appropriate Yes/No answer.) Yes FNo N/A 1 . Have suffcent aurveys (i e .poe emediation. characterzauon. ec.) boen obtained for the survey urt? X 2 Do the surveys (from Questilon 1)demonstrate that the eurvey un4 will rmost ikely peas the FSS? X
- 3. i the physical work (i.e. retnediation & housakeeping) in or around the survey unit compute? X A. Havoil toots.rornpermanent equiprment, and mr.ztrlal not neSod to portofrn thu FSS bron ruirrove7 X
- 5. Are th, euv ey~ surf ecs r~etariely trc: 0*lcooe debris (i e .dfrt. concrete dudl. rnetat tflfnga, ecC 17 X
_ta .Inec)
- 6. Are thbesurvey suflXrs relatively rete of liquid 11e water. m isture. cil. etc.J)7 X :
- 7. Are the survey aurfacest fre a a4 paint, which has the potnitatl to shield ndltlonV X
- a. Have the Surface Meeasurement Test Areus (SMTA) besn AdsbWthed? (Refer to Extiibft 2 to' m!trucrtivls.) X 8 Have the Surtect Meassurement Test Areas (SMTA) oftit been collected? (Rneremto Evh'it fitor insructions) i AX
- 10. Are the survey ourfacest eauy accessible? (No scaffolding. high reach. etc ih headed to perfofn the F55) X i m. s lighting adequate to perferm the FS^7 X
- 12. -to Ut arca Induatntoly srfc to pcrform the FS7 (Evziluate pctanffal falg a trIp hazards. conitned epaccs. etc) J X
- 13. Have phtotOaOihe been taken showin he overal conMiton ot the are8 X.
. . __ - ... _.x
- 14. Have al unsatifactory conruwno ben resolveI? - X _
NOTF: Uf a No anwr*is obta"ed ebove. the nspector should imrmediately correct lhs correctie atetonS thbrmh the m sireor inMitiate raponsibe site depatment, a applicable. Oecurnerdl ctons taken and/or ustlfictallon hn the C rComent section below. Attach additional sheetsas neceary.
Comrrnenb:
I.,
- I Survey Unit Inspector (print/sign) D. Sorge t( Date 4(0(05 Survey Designer (p3rnsign) </E Dete
'-I
.fWi9Cflfll&%SVu 9-2-s
Appendix B to Appendix C SSURV-EYREQU ONTINUATION SHEET.I SR NUMBER ' 0209 .4--AREA/L;OCATIONj L1-1
" .SPECIFIC :.LINR/SURVY INSTRUCiT O COMMENTS' RESULTS
SUMMARY
FOR SR-0209 SR-0209 was issued to obtain radiological survey and sampling data to ensure Final Site Survey activities are complete. The survey unit covered under this SR is OL11-1 (grids'are listed in the SR). The SR required the following radiological measurements.
- Surface scan measurements using a 2' x 2' Nal detector (set to identify Cs-137). Survey techniques will be IAW the SR.
- A total of 17 Site Surface Dose Model Samples (SSDM) were, provided to be taken for analysis. SNEC Calculation Sheet using 'COMPASS' program required 14 samples to be taken.
- Site Surface Dose Model Samples (Auger Method). Obtain samples as directed in the SR. Using the auger, obtain a sample 1 meter in depth.
- QC Repeat Measurements: A minimum of 5%of all surface scan measurements and sampling were re-performed using identical methodology. SSDM sampling was performed by taking a second sample from the same drill hole.
- QC Repeat Analysis: A minimum of I sample per SR or 5%, whichever is greater, of all SSDM samples' were analyzed using identical methodology.
- Additional sampling/surveys were not performed.
I. Summary of Results A. Surface Scan Measurements (2" x 2" Nal Detector)
A 100% surface scan was required of all accessible areas of certain grids, lAW the SR. A total of 57.52%
of this Class 2 area was surveyed,' which is well within design basis.
Results: No areas indicated activity above the action level of >350 GCPM (gross counts per minute).
B. Surface Static Measurements No static measurements were obtained.
Results: Not Applicable.
Page l of 2.
5/31/2005-.
orleeX.- $t.^it SURVEY-REQEST ..................'CtS0........E SR-NUMBER - 0209 R OCATIONi I OL11-1
-' '. . .SPEC-FI TGYVINSTRUCTIONSORCtT C. Site Surface Dose Model Sampling Seventeen (17) SSDM samples were obtained. Two (2) SSDM QC samples were taken. These samples were statistically spaced based on a random starting point due to the lack of noticeable elevated activity during final post remediation scan/static surveys.
Results: Four (4) SSDM samples taken for this SR were less than MDA. MDA activity range is from 0.09 pCilg to 0.16 pCi/g (for the surrogate isotope, Cs-137). For the thirteen (13) samples,' not including QC samples, that did contain positive Cs-1 37 activity, activities ranged from 0.07 pC'Ug to 0.26 pCiUg. No other licensed isotopes identified for this particular SR.
- 2. Quality Control (QC) Measurements and Comparisons Repeat Scan measurements and SSDM samples were performed and met the applicable acceptance criteria established in Section 4.6 of E900-IMP4520.04. QC scan measurements were repeated for 5.56% of the area scanned. SSDM sample QC measurements were repeated for 11.76% of SSDM samples.
- 3. Quality Control Sample Recounts Repeat QC replicate recount - SNEC has determined that, at a minimum, one SSDM sample, or five per cent (5%) of SSDM samples from each SR will have replicate gamma spectroscopy counts performed on them. In the case of this SR, 1 SSDM sample 'had a replicate count performed; sample
- 5-23774, satisfying this requirement.
- 4. Exceptions and Discrepancies Grids requiring 100% survey by the SR that were not completely surveyed had trees, brush and stone located in the grids, making these points inaccessible. See the scan worksheeet for a synopsis of the obstacles
- 5. Special Note(s)
As stated previously, as this is a Class 2 area, scan coverage of approximately 10%-50% will suffice to show due diligence in survey technique for release of the' site for unrestricted use.
fgIA4 5- PCIA, 7V415 2OC15 Page 2of 2 -
5/26/2005 .
,, .;,SURVEY REQUEST CON'TI ATION SRNUMIER 0210 l ARE iLOCATION OL11-2
.P FI A L SUREY INSTRUCTIONS OR COMMENTSSE RESULTS
SUMMARY
FOR SR-0210 SR-0210 was issued to obtain radiological survey and sampling data to ensure Final Site Survey activities are complete. The survey unit covered under this SR is OLI 1-2 (grids are listed in the SR). The SR required the following radiological measurements.
- Surface scan measurements using a 2" x 2" Nal detector (set to identify Cs-1 37). Survey techniques will be lAW the SR.
- A total of 17 Site Surface Dose Model Samples (SSDM) were provided to be taken for analysis. SNEC Calculation Sheet using 'COMPASS' program required 14 samples'to be taken.
- Site Surface Dose Model Samples (Auger Method). Obtain samples as directed in the SR. Using the auger, obtain a sample 1 meter in depth.
- QC Repeat Measurements: A minimum of 5% of all surface scan measurements and sampling were re-performed using identical methodology. SSDM sampling was performed by taking a second sample from the same drill hole.
- QC Repeat Analysis: A minimum of 1 sample per SR or 5%, whichever is greater, of all SSDM samples were analyzed using identical methodology.
- Additional sampling/surveys were performed at the direction of the SR Coordinator.
- 1. Summary of Results A. Surface Scan Measurements (2" x 2" Nal Detector)
A 100% surface scan was required of all accessible areas of certain grids, lAW the SR. A total of 57.41%
of this Class 2 area was surveyed, which is well within design basis.
Results: With the exception of one (1) point in grid'BD-138, no areas indicated activity above the action level of >350 GCPM (gross counts per minute).
B. Surface Static Measurements One static measurement was obtained in grid BD-138 at the alarm point (AP).
Results: AP-1: 368 gcpm.
Pagej of 3 5/31/2005
`SURVEY EQUEST!C-ONTINUATION SHEET-1 '~
SRUB&0210 REIOAONOLI 1-2
-' SPECIFICSSAPIG/SURVEYJ-NSTRUCTIONS OR COMM1ENTS C. Site Surface Dose Model Sampling Seventeen (17) SSDM samples were obtained. Two (2)SSDM QC samples were taken. These samples were statistically spaced based on a random starting point due to the lack of noticeable elevated activity during final post remediation scanlstatic surveys.
Results: Five (5)SSDM samples taken for this SR were less than MDA. MDA activity range is from 0.07 pCiig to 0.23 pCVg (for the surrogate isotope, Cs-137). For the'twelve (12) samples, not including QC samples, that did contain positive Cs-137 activity, activities ranged from 0.07 pCVg to 0.87 pCi/g. No other licensed isotopes identified for this particular SR.
- 2. Quality Control (QC) Measurements and Comparisons Repeat Scan measurements and SSDM samples were performed and met the applicable acceptance criteria established in Section 4.6 of E900-IMP-4520.04. QC scan measurements were repeated for 5.69% of the area scanned. SSDM sample QC measurements were repeated for 11.76% of SSDM samples.
- 3. Quality Control Sample Recounts Repeat QC replicate recount - SNEC has determined that, at a minimum, one SSDM sample, or five per cent (5%) of SSDM samples from each SR will have replicate gamma spectroscopy counts performed on them. In the case of this SR, 2 SSDM samples had replicate counts performed; sample
- 5-23714 and #5-23734, satisfying this requirement.
- 4. Exceptions and Discrepancies
- Grids requiring 100% survey by the SR that were not completely surveyed had trees located in the grids, making these points inaccessible.
- See #5 for AP-1 information Page 2 of 3
.5t26/2005'
SL.RVEY.REQUEST CONTINUATION SHEET SR NUMBER 0210 AREAILOCATION OL11-2
.i s
- -PLING/suRvEYiNsTRucN CSOR S COM ENTSI
- 5. Special Note(s)
As stated previously, as this is a Class 2 area, scan coverage of approximately 10%-50% will suffice to show due diligence in survey technique for release of the site for unrestricted use.
QC Static measurement taken at AP-1 was 329 gcpm.
One (1) SSDM sample was taken at the AP. Three (3) additional samples were taken to bound the AP to ensure no activity migration has occurred. All samples were taken in grid BD-1 38.
Cs-137 activity found in soil at the AP was 0.15 pCig.
One (1) bounding sample showed Cs-1 37 activity greater than MDA at 0.12 pCilg.
MDA for samples taken for AP resolution ranged from 0.07 to 0.21 pCilg.
9"AA '< El,(,.. 4tj I-OVIV9, /I 1-00.5 Prnnt/Signature Date Page 3 of 3 126t005