ML052140153
| ML052140153 | |
| Person / Time | |
|---|---|
| Site: | Saxton File:GPU Nuclear icon.png |
| Issue date: | 04/29/2005 |
| From: | Cooper W FirstEnergy Corp |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| E900-05-011, Rev 0 | |
| Download: ML052140153 (39) | |
Text
Appendix B Concrete Survey Design
SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-05-O11 0 /3/I5 I of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in 0L2 - Survey Design Question I - Is this calculation defined as 'in OA Scope"? Refer to definition 3.5. Yes 0 No El Question 2 - Is this calculation defined as a 'Design Calculation-? Refer to definitions 3.2 and 3.3. Yes 0 No [
NOTES: If a 'Yes' answer is obtained for Question 1, the calculation must meet the requirements of the SNEC Facility Decommissioning Quality Assurance Plan. If a 'Yes' answer is obtained for Question 2, the Calculation Originators immediate supervisor should not review the calculation as the Technical Reviewer.
DESCRIPTION OF REVISION APPROVAL SIGNATURES Calculation Originator W. J. Cooper CHP Date Technical Reviewer R. Holmes/l Date A /o6 Additional Review A. Paynteri Date 2A A ' God r.
Additional Review Date
- A n SNEC CALCULATION SHEET - - -
Calculation Number Revision Number Page Number E900-05-011 o0 Page 2 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in 0L2 - Survey Design 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for the residual concrete surfaces in the Saxton Nuclear Experimental Corporation Westinghouse and adjacent open land areas that are located north of the SNEC facility site. The area (0L2) is approximately 5300 square meters, and is a Class 1 survey area. Because the survey area exceeds the 2000 square meter limitation in the SNEC LTP (Reference 3.5) Table 5-5 for maximum class 1 open land survey unit area, this survey area is subdivided into three survey units:
1.1.1 MA8-5, consisting of the concrete 'Transformer Repair Pad" at the north end of the area, the drainage headwall in BE128 and the nearby well head concrete surfaces with approximately 70 square meters of concrete surface. MA8-5 is separately classified as a Class 3 survey area per the LTP table 5-2.
1.1.2 0L2-1, which consists of the roughly 20 meter wide by 100 meter long arc of open land outside the Westinghouse area fence and bounded by portions of OL10 and 0L4, and 1.1.3 0L2-2, consisting of the roughly 50m by 60 m by 78 m triangular open land area inside the Westinghouse area fence. This survey design applies only to the residual concrete surfaces in the survey area.
1.2 The design for the open land areas, 0L2-1 and 0L2-2, will be provided in a separate calculation (E900-05-009) for simplicity and this survey design applies only to the exposed concrete surfaces in the 012 area. The general layout of this survey unit is shown on Attachment 1-1.
1.3 An approximately 1525 square meter portion of 0L2 that is inside the switchyard fence will be surveyed with the rest of the switchyard under a separate design package.
1.4 Fences present in and / or bordering the 0L2 area will be surveyed under a separate generic fence survey design package.
1.5 A portion of the transformer repair pad lies outside of 012, within the MARSSIM class 2 area 0L12. The entirety of the pad is to be surveyed as class 3 under this design for simplicity. This does not imply the classification of that portion of the pad is changed between the two open land survey areas..
2.0
SUMMARY
OF RESULTS The following information should be used to develop a survey request for this survey unit. The effective DCGLw value is listed below. This value is derived from previously approved derived values for "CV Yard Soil and Boulder Samples" in Reference 3.15. The US NRC has reviewed and concurred with the methodology used to derive these values. See Attachment 2-1 and Reference 3.9.
Table 1, DCGLw Values I Gross Activity DCGLw(dpml1DO cmz) I 26445 (19834 A.L.)
NOTE: AL. is the site Administrative Umit (75% of effective DCGLw)
?.~ SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-011 I 0 Page 3 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in 0L2 - Survey Design 2.1 Survey Design 2.1.1 Scanning of concrete surfaces shall be performed using a L2350 with 43-68B large area gas flow proportional counter calibrated to Cs-137 (see typical calibration information on Attachment 3-1).
2.1.2 The instrument conversion factor/efficiency (Et) shall not be less than that assumed on Attachment 4-1 as 23.9% - Cs-137 (Ei*Es).
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 above.
2.1.4 An efficiency correction factor (ECF) is applied to compensate for efficiency loss when surveying rough surfaces based inspection of the surface and based on Reference 3.1 and Attachment 2-2.
2.1.5 The fraction of detectable beta emitting activity affects the efficiency and is determined by the nuclide mix. The mix beta fraction is determined to be 60% based on Reference 3.15. Because the adjusted DCGLw used is based only on the modified Cs-137 DCGLw, the mix percentage is not applied to the adjusted surrogate DCGLw. The gross activity DCGLw, which would include all the low energy activity and would require mix percentage adjustment is considerable higher, at 44434 dpm I 00cm2. The Cs-1 37 adjusted surrogate activity already accounts for the beta yield of the mix. The ECF is derived from Attachment 2-2 and Reference 3.10 based on an expected surface irregularity of 1 inch or less.
Table 2, GFPC Detection Efficiency Results Used for Planning Material Type El Es Et(as %) ECF Adjusted efficiency Concrete .478 .5 23.9 .57 13.6 1 Table 3, Surface Scanning Parameters for Solid Misc. Concrete Sections MDCscan Scan Speed Maximum Distance from Surface DCGLw %Coverage (dpml100cm' (cmlsec) Action Level 2969 10 1 (gap between detector face & 3400 ncpm 100%
surface)
See Attachment 2.1 and 4.1 for calculations 2.1.6 This MDCscan is based on a 1000 cpm maximum background. Typical backgrounds are well below this value assumed, typically on the order of 300 cpm. Unaffected material backgrounds were determined at the Williamsburg station, which resulted in a mean background value of 306 cpm +1-34.5. This data is derived from Reference 3.15.
2.1.7 On 317/05 open window and shielded GFPC measurements were obtained directly from the transformer repair pad. This data (Attachment 8-2) is used for the variability assessment for the COMPASS determination of sample requirements. If
SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-01 0 Page 4 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in OL2 - Survey Design local backgrounds exceed the background count rate assumed for the MDCscan (1000cpm - see Attachment 4-1) contact the cognizant SR coordinator.
2.1.8 The scan DCGLw Action Level listed in Table 3 does not include background. The DCGLw action level is based on fixed measurement and does not include 'human performance factors' or 'index of sensitivity' factors (see Reference 3.12).
2.1.9 If a count rate greater than the uDCGLw action level" of Table 3 is encountered during the scanning process, the surveyor should stop and locate the boundary of the elevated area, and then perform a "second phase" fixed point count of at least 30 seconds duration. If the second phase result equals or exceeds the "DCGLw action" level noted in table 3, the surveyor should then mark the elevated area with appropriate marking methods and document the count rate observed and an estimate of the affected area 2.1.9.1 Class 3 concrete should be scanned to include up to 10% surface coverage at a scan rate of about 10 cm per second. Since the most likely locations of residual activity would be on the flat surfaces of old concrete, the entirety of the top surface of the transformer repair pad should be surveyed. This would greatly exceed the needed 10% coverage.
2.1.9.2 This is a class 3 survey area. The upper surface of the transformer repair pad is required to be scanned. See Attachment 1-1 for grid layout for the survey unit. Areas that cannot be accessed should be clearly noted along with the reason for not completing the scan in that area.
2.1.9.3 The surfaces of the concrete should be clear of debris to ensure detection parameters are not affected.
2.1.10 The minimum number of fixed measurement sampling points (N+20%) indicated by the COMPASS computer program (Reference 3.3) is 11 for the aggregate survey unit (see COMPASS output on Attachment 7-1 to 7-3). Fixed point measurements should be IAW Section 2.2. The MDCscan (concrete) is below the effective administrative DCGLwc3.137 (2969 DPMI100cm2 MDCscan @1000cpm bkg < 19834 DPMI1 00cm2 AL).
2.1.11 Although class3 areas can be random I judgmental sampling locations, VSP (Reference 3.4) is used to plot all sampling points on a random start systematic method consistent with class I survey requirements as shown on 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 concerns (see Attachment 6-1 to 6-2 for VSP sampling point locations) 2.1.11 The starting points for physically locating sample sites for the large slab in the survey unit are based on measurements from the south-west comer of the large concrete slab. Other points are to be located as shown on the smaller monoliths
SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-011 I 0 l Page 5 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in OL2 - Survey Design (see diagram on Attachment 6-1). The drainage headwall is not shown, as no survey is required on it.
2.1.12 Some sampling points may need to be adjusted to accommodate obstructions within the survey area. Contact the SR coordinator to report any difficulties encountered when laying out systematic grid sampling points.
2.1.13 When an obstruction is encountered that will not allow collection of a sample, contact the cognizant SR coordinatorforpermission 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 since it is based on a class 3 survey unit.
2.2 Measure concrete fixed point and elevated areas(s) lAW SNEC procedure E900-IMP-4520.04 sec 4.3.3 (Reference 3.2) and the following.
2.2.1 Clearly mark, identify and document all sample locations.
2.3.1 Second phase scan any location that is above the second phase action level cited in Table 3.
3,0 REFERENCES 3.1 SNEC Calculation number 6900-02-028, "GFPC Instrument Efficiency Loss Study" 3.2 SNEC Procedure E900-IMP-4520.04, "Survey Methodology to Support SNEC License Termination".
3.3 COMPASS Computer Program, Version 1.0.0, Oak Ridge Institute for Science and Education.
3.4 Visual Sample Plan, Version 3.0, Copyright 2004, Battelle Memorial Institute.
3.5 SNEC Facility License Termination Plan.
3.6 SNEC Procedure E900-IMP-4500.59, "Final Site Survey Planning and DQA".
3.7 SNEC survey GFPC measurements in OL2 at the transformer repair pad 317/05 3.8 GPU Nuclear, SNEC Facility, 'Site Area Grid Map", SNECRM-020, Sheet 1, Rev 4, 1/18/05.
3.9 SNEC Calculation No. E900-03-012, Effective DCGL Worksheet Verification.
3.10 SNEC calculation 6900-02-028 'GFPC Instrument Efficiency Loss Study" 3.11 SNEC Procedure E900-IMP-4520.06, "Survey Unit Inspection in Support of FSS Design".
3.12 NUREG-1575, "Multi-Agency Radiation Survey and Site Investigation Manual", August, 2000.
3.13 Microsoft Excel 97, Microsoft Corporation Inc., SR-2, 1985-1997.
3.14 (left intentionally blank) 3.15 SNEC Calculation E900-04-005 uCV Yard Survey Design - North West Side of CV"
':: g
- SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-011 0 Page 6 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in OL2 - Survey Design 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 3.3).
4.2 Survey unit specific shielded measurements were obtained on 317105. These are used as the initial estimate of variability. These results are shown on Attachment 8-2 and 8-3.
Reference background data from offsite at the Williamsburg station are similar to this recent data. The Williamsburg Station results are shown on Attachment 8-1 and in Reference 3.15.
4.3 The MARSSIM Sign Test (Reference 3.12) will be applicable for this survey design. No background subtraction will be performed under this criteria during the DQA phase.
4.4 The required 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 has been measured in the area, and ranges from about 300 cpm to about 375 cpm (Reference 3.7).
4.7 The determination of the physical extent of this area is based on the drawing Reference 3.8.
4.8 Remediation History OL2 is an open land area with scattered concrete monoliths. Portions contained installed buildings (the Westinghouse area) during power operations. The buildings and building pads from plant operations have been removed. Portions of the soil areas were remediated.
Based on inspection, the concrete monoliths have not been remediated, and some were installed post-shutdown.
4.9 This survey design uses Cs-137 as a surrogate for all SNEC facility related radionuclides in the survey unit. The effective DCGLw is the Cs-137 DCGLw from the SNEC LTP (28000 dpm/1OOcm 2) adjusted (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-137 concentration to an effective surrogate DCGLw for this survey area.
The sample database used to determine the effective radionuclide mix for the OL2 area has been drawn from samples that were assayed at off-site laboratories. This nuclide mix is copied from Reference 3.15.
The GFPC detector scan MDC calculation is determined based on a 10 cm/sec scan rate, a 1.38 index of sensitivity (95% correct detection probability and 60% false positive) and a detector sensitivity (Et) of 23.9% cpm/dpm for Cs-137. The expected range of background values varies from about 300 cpm to -400 cpm, but the design assumes ( for MDCscan assessment) that background may be as high as 1000 cpm.
4.10 The survey unit described in this survey design was inspected after remediation efforts were shown effective. A copy of the MA8-5 specific portion of the SNEC facility post-remediation inspection report (Reference 3.11) is included as Attachment 9-1.
e-_ SNEC CALCULATION SHEET Calculation Number Revision Number l Page Number E900-05-11 I 0 l Page 7 of 9 Subject Westinghouse and Adjacent Areas MAB-5 concrete pads in 0L2 - Survey Design 4.11 No special area characteristics including any additional residual radioactivity (not previously noted during characterization) have been identified in this survey area.
4.12 The decision error for this survey design is 0.05 for the ca value and 0.1 for the p value.
4.13 ESpecial measurements" (as described in the SNEC LTP) are not included in this survey design.
4.14 No additional sampling will be performed 1AW this survey design beyond that described herein.
4.15 SNEC site radionuclides and their individual DCGLw values are listed on Exhibit I of this calculation based on Table 5-1 of Reference 3.5.
4.16 The survey design checklist is listed in Exhibit 2.
4.17 Area factors are shown as part of COMPASS output (see Attachment 7-1) and are based on the Cs-1 37 area factors from the SNEC LTP.
5.0 CALCULATIONS 5.1 All calculations are performed internal to applicable computer codes or within an Excel (Reference 3.13) spreadsheet.
6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey unit MA8-5.
6.2 Attachment 2-1 and 2-2 are the DCGLw calculation logic for the survey unit from Reference 3.15 and the estimate of effect on efficiency of the irregular surface.
6.3 Attachment 3-1, is a copy of the calibration data from typical GFPC radiation detection instrumentation that will be used in this survey area.
6.4 Attachment 4-1, is the MDCscan calculation sheet for concrete surfaces in dpml100cm2 .
6.5 Attachment 5-1, is not used 6.6 Attachment 6-1 to 6-2, show the randomly picked scan locations (from VSP) and reference coordinates for the survey unit areas.
6.7 Attachment 7-1 through 7-3, are COMPASS output for the survey unit showing the number of sampling points in the survey unit, area factors, and prospective power.
6.8 Attachment 8-1, is the surface variability results for concrete surface measurements from the Williamsburg station (Reference 3.15). Attachment 8-2 and 8-3 are the 317/05 survey data in the survey unit.
6.9 Attachment 9-1, is the results of the inspection report for the MA8-5 portion of the OL2 area
SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-011 0 Page 8 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in 0L2 - Survey Design 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)
(dpml100cm ) (Surface & Subsurface) (Surface &Subsurface)
(pCilg) (pCilg)
Am-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 3.0E+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 1.2 0.61 NOTES:
(a)While drinking water DCGLs will be used by SNEC to meet the drinking water 4 mremry goal, only the DCGL values that constitute the 25 mrem/y regulatory limit will be controlled under this LTP and the NRC's approving license amendment.
(b) Listed values are from the subsurface model. These values are the most conservative values between the two models (i.e.,
surface &subsurface).
A c e. SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-O11 I 0 Page 9 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in OL2 - Survey Design Exhibit 2 Survey Desihn Checklist Calculation No. Location Codes E900-05-011I Westinghouse and Adjacent Areas MAB-5 concrete pads In 0L2 Status Reviewer ITEM REVIEW FOCUS (Circle One) inittials & Date I
2 Has a survey design calculation number been assigned and is a survey design summary Are drawingsdiagrams adequat description provided?
rthe subject area (drawings should have compass S Ye N/A N/A I
itQw 0
2r dra A ings dia rams adeq ate heading s)? .
3 Are boundaries properly identified and is the survey area classification clearly indicated? MeIq 4 Has the survey area(s) been properly divided into survey units 1AW EXHIBIT 10 Gq NIA &2 5 Are physical characteristics of the area/location or system documented? ne N A x 1`41 6 Is a remediation effectiveness discussion included? Yes,9/NA 229/o Have characterization survey and/or sampling results been converted to units that are NA AY comparable to applicable DCGL values? _ _
8 Issurvey and/or sampling data that was used for determining survey unit variance included? CD N/A Is a description of the background reference areas (or materials) and their survey and/or Yes, sampling results included along with a justification for their selection?e 10 Are applicable survey and/or sampling data that was used to determine variability included?
Will the condition of the survey area have an impact on the survey design, and has the 'f/ /
probable impact been considered in the design? IfPo Has any special area characteristic Including any additional residual radioactivity (not (Z 12 previously noted during characterization) been identified along with its impact on survey Yes A
______design?
13 Are aln necessary supporting calculations and/or site procedures referenced or included? 1N/A 14 Has an effective DCGLw been Identified for the survey unit(s)? NA 15 Was the appropriate DCGLkc included Inthe survey design calculation? Yes, A q/j 16 Has the statistical tests that will be used to evaluate the data been identified? Yes N/A quz 17 Has an elevated measurement comparison been performed (Class 1 Area)? Yes, N/A 18 Has the decision error levels been identified and are the necessary justifications provided? A '1/
19 Has scan instrumentation been identified along with the assigned scanning methodology? Yes, N/A 20 Has the scan rate been Identified, and isthe MDCscan adequate for the survey design? YsNA 21 Are special measurements e.g., In-situ gamma-ray spectroscopy required under this design, Yes and is the survey methodology, and evaluation methods described? e s 22 Issurvey instrumentation calibration data included and are detection sensitivities adequate? 15es)N/A 23 Have the assigned sample and/or measurement locations been clearly identified on a diagram (T N/A or CAD drawing of the survey area(s) along with their coordinates? e f/
24 Are investigation levels and administrative limits adequate, and are any associated actions A 90/;
clearty indicated?NA 25 For sample analysis, have the required MDA values been determined.? Yes,( i '7I Zf 26 Has any special sampling methodology been identified other than provided in Reference 6.3?
NOTE: a copy of this completed form or equivalent, shall be Included within the survey design calculation.
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Effective DCGL Calculator for Cs-1 37 (dpml100 cmA2) I a I Gross Activity DCGLw I Gross Activity Administrative Limit 44434 ldpm/100 cmA2 33325 ldpml100 cmA2
__ 25.0mrem/y TEDE Limit I Cs.137 Limit l cs-i 37 Administrative Limit SAMPLE NO(s)= tOV YARD SOIL & BOULDER SAMPLES l 26445 _dpm/100 cmA2 l 19834 ldpm/100 cmA2
! 'SNECAL., 75%
Sample Input Individual Limits Allowed dpm/10O Beta dpm/100 Alpha dpml100 Isotope (pCI/g, uCI, etc.) % of Total (dpm/100 cmA2) cmA2 mremly TEDE cm^2 CmA2 1 Am-241 0.000% 27 0.00 0.00 .. NIA 0.00 Am-241 2 C-14 0.000% 3,700,000 0.00 0.00 0.00 .:A C-14 3 Co-60 ';.25E-r10 0.443% 7,100 196.87 0.69 196.87 N/A Co-60 4 Cs-137 .3 -E c- 59.515% 28,000 26444.68 23.61 26444.7 N/A Cs-137 S Eu-152 0.000% 13,000 0.00 0.00 0.00 NIA Eu-152 6 H-3 5.57E-01 39.500% 120,000,000 17551.45 0.00 Not Detectable N/A H-3 7 Ni-63 0.000% 1,800,000 0.00 0.00 Not Detectable N/A Ni-63 a Pu-238 0.000% 30 0.00 0.00 NIA 0.00 Pu-238 g Pu-239 0.000%° 28 0.00 0.00 NIA 0.00 Pu-239 la Pu-241 0.000% 880 0.00 0.00 Not Detectable
=4 N/A PU-241 11 Sr-90 7.64E-03 0.542% 8,700 240.75 0.69 240.75 N/A Sr-90
- 4 4 4 4 t 100.000% 44434 25.0 26882 0 4 -
Maximum Permissible dpm/100 cmA2
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2350 INSTRUMENT AND PROBE EFICIENCY CHART 7/01/04 (Typical 43-68 Beta Efficiency Factors)
I DifTercmn i iilm Inistrumcn lProbc Cal DuIc I vmiun:.)it in.s:lIlIIlno !i;(\ I INST 43-68 PROBE 44-10 PROBE BETA ALPHA INST# C/D PROBE C/D PROBE C/D BA 79037 04/05/05 122014 04/23/05 = _ _. 7 N/A 126188 1/27/05 099186 1/27/05 28.2% N/A 126218 01/08/05 095080 01/09/05 27.9%/ N/A 0totdri cv 3I)
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GFPC Scan MDC Calculation MDCscan = 2969 dpm/100cm2 b = background in counts per minute bi = background counts in observation interval Ei = GFPC Detector / meter calibrated response in cpmldpm Es = Source efficiency emissions / disintegration Et = Net detector efficiency d = Index of sensitivity from MARSSIM Table 6.5 based on 95% detection, 60% false positive p = human performance adjustment factor - unitless SR = Scanning movement rate in centimeters per second MDCscan = MinimumDetectable Concentration for scanning in dpm/100cm2 C= Constant to convert MDCR to MDC Wd = Detector width in cm A= area of probe in cm2 Oi = Observation interval in seconds DCGLeq = Net count rate equivalent to the Adjusted DCGL ECF = Efficiency correction factors (surface roughness)
AL = Action level, DCGLeq adjusted for d and p b= I 1000 lcpm p= 0.5 Wd = . cm SR= I 10 lcm d 1.38 DCGL = r 19834 ldpm/100 cm2 Ei=J 0.478 lcpm/dpm Es=l 0.500 l A= 126 cm 2 ECF= [ 0.57 l Es*Ei= 0.239 = Et Wd = 0.88 = Oi (sec) b*Oi = 14.7 = bi (counts)
SR 60 (sec/min) 1 = 8.24 =C Ei*Es*ECF*AI1 00*sqrt(p) d*sart(bi)*60 = 360 =MDCRi (net cpm) MDCRi+b= 1360 = gross cpm at MDCRi Oi MDCRi
- C = 2969l= MDCscan in dpm/100cm2 DCGL*Ei*Es*ECF*A = 3405 = DCGLeq cpm 100 -1 E ?00- OS- (I I
MA8-5 OL2 Transformer Repair Pad U Cie -4, ~%
Geo8 well head Origin southwest comer of top slab Ai cn't-)
~COI-
MA8-5 Transformer Repair Pad measurements in FEET X Coord Y Coord Label Value Type 2.6901 4.7986 FP-1 () Systematic 11.4979 4.7986 FP-2 C) Systematic 20.3057 4.7986 FP-3 C) Systematic 29.1135 4.7986 FP-4 C) Systematic 37.9213 4.7986 FP-5 C) Systematic 7.094 12.4264 FP-7 0Systematic 15.9018 12.4264 FP-8 0Systematic 24.7096 12.4264 FP-9 C0Systematic 33.5174 12.4264 FP-10 0Systematic 42.3252 12.4264 FP-1 I C0Systematic SW side of well head concrete FP-6 0Systematic ETOO - 0.S5 ° I\1
Site Report Site Summary Site Name: MA8-5 Planner(s): WJCooper Contaminant Summary NOTE: Surface soil DCGLw units are pC11g.
Building surface DCGLw units are dpmI100 cn2.
Screening Contaminant Type DCGLw Value Used? Area (ml) Area Factor Cs-137 Building Surface 19,834 No 9 2.2 4 3.7 1 11.2 14tosl ha 7-1 MtD -0S,- A COMPASS v1.0.0 2125/2005 Page I
eBLBuilding Surface Survey Plan Survey Plan Summary Site: MA8-5 Planner(s): WJCooper Survey Unit Name: Transformer Repair pad & misc concrete Comments:
Area (m2 ): 69 Classification: I Selected Test: Sign Estimated Sigma (cpm): 51.1 DCGL (cpm): 3,499 Sample Size (N): 11 LBGR (cpm): 3,350 Estimated Conc. (cpm): 135 Alpha: 0.050 Estimated Power 1.00 Beta: 0.100 EMC Sample Size (N): 11 Prospective Power Curve 9~1
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0 SOO 1000 1500 2000 2500 3000 3500 4000 Net Beta (Cpm)
- Power - DCGL - - Estima ated Power
- LBGR
- 1-beta A
u Lo-0
-t f ti\+ r 7o-.
318/2005 Page 1 COMPASS vl.0.0 v1.0.0 318Z2005 Page I
Building Surface Survey Plan Contaminant Summary DCGLw Contaminant (dpml100 cm')
Cs-137 19.834 Beta Instrumentation Summary Gross Beta DCGLw (dpm/100 cmj: 19,834 Total Efficiency: 0.14 Gross Beta DCGLw (cpm): 3,499 ID Type Mode Area (cm')
1 12350 w/ 43-58 Beta 126 Contaminant Energy' Fraction' Inst. Eff. Surf. Eff. Total Eff.
Cs-137 187.87 1.0000 0.24 0.57 0.1362
'Average beta energy (keV) [N/A indicates alpha emission]
'Activity fraction Gross Survey Unit Mean (cpm): 472
- 44 (1-sigma)
Count Time (min): I Numberof Average Standard MDC Material BKG Counts (cpm) Deviation (cpm) (dpm/100 cm')
Repair pad concrete 6 336.7 26.7 501 4ttoitvch-f 2-3 FMa- 05s-o n COMPASS v1.0.0 318t2005 Page 2
Williamsburg Concrete Background Measurements 37122N21 Instrument964 RLM6220 Tine Dector Counts CountTimne ( Mode Designator FSS-001 BHB 0 BKGND 1/4/2002 8:52 1 7.26E.03 1800 SCL Intal Background P 1 Source Check 11412002 9:07 1 1 .79E405 60 SCL Source 18 2 BKGND 11412002 10:05 2 4.40E+01 1800 SCL Inhal Background a concn.Ccrc.n . ° 14 Source Check 11412002 10:39 2 1.51IE+05 60 SCL Source a Shielded Unshielded 15 CON AlS 1/412002 13:00 1 2.78E+02 60 SCL Shielded 2.78E+02 _____
16 CON A1U 114/2002 13:02 1 3.88E+02 60 SCL Unshielded 3.88E+02 17 CON A2S 1/412002 13:20 1 2.39E+02 60 SCL Shielded 2.39E+02 :.... .
18 CON A2U 1/42002 13:21 1 222E+02 60 SCL Unshielded O _______ 2.22E+02 19 CON A3S 1412002 13:25 1 2.39E+02 60 SCL Shielded 2.39E.02 :.:
20 CON A3U 11412002 13:30 1 2.62E+02 60 SCL Unshielded . :2.62E+02 21 CON A4S 1142002 13:36 1 2.45E+02 60 SCL Shided 2.45E.02 - :
22 CON MU 1)12002 13.38 1 2.71E+02 60 SCL Unshielded _____2.71 E+02 23 CON ASS 1/4/2002 13:58 1 2.00E+02 60 SCL Shided B 2.OOE402 ____
24 CON ABU 11/42002 14:00 1 2.82E+02 80 SCL Unsheded a 2.82E.02 25 CON ASS 1142002 14:03 1 1.84E+02 60 SCL Shielded 1.84E.02 .~
26 CON AU 114t2002 14:05 1 3.10E+02 60 SCL Unshielded B 3.10E.02 27 CON A7S 1/4/2002 14:09 1 1.9SE+02 60 SCL Shielded 1.98E402 ____
28 CON A7U 1)4/20= 14:10 1 3.15E+02 60 SCL Unshielded B 3.15E+02 29 CON ASS 1142002 14:19 1 2.34E+02 60 SCL Shielded 2.34E+02 .
30 CON AMS /142002 14 22 1 231E+02 60 SCL Shielded 2.31E+02. ...
31 CON A8U 11V2002 14:24 1 2.88E+02 60 SCL Unshieded -If:z~,'::-2.88E+02 32 CON A9S 114/2002 1431 1 2.65E+02 60 SCL Shielded 2.65E+02 ____
33 CON ASU 11V2002 14:33 1 2.89E+02 60 SCL Urnhlelded 2.89E+02 34 CON A10S 1142002 14:42 1 2.48E+02 60 SCL Shielded 2.46E+02 ____
35 CON AIOU 114/2002 14:43 1 3.16E+02 60 SCL Unshided :4~ 3.16E+02 36 CON A1IS 114/2002 15:10 1 1.95E+02 60 SCL Shielded _ 1.95E+02 I____
37 CONAIIU 1/4/2002 15:12 1 2.94E+02 60 SCL Unshielded 2.94E+02 38 CON A12S 114/2002 15:13 1 2.21E+02 60 SCL Shielded _ 2.21E+02 ~~
39 CON A12U 114/2002 15:14 1 2.84E+02 60 SCL Unshielded 2.84E+02 .
40 CON A13S 1/42002 15:23 1 1.74E+02 60 SCL Shielded 1.74E+02 _____
41 CON A13U 1/4/2002 15:24 1 2.94E+02 6o SCL Unshielded 2.94E+02 42 CON A14S 114/202 15:25 1 1.96E+02 60 SCL Shielded 1.96E+02 : -
43 CON A14U 1//2002 15:26 1 3.33E+02 60 SCL Unshielded .
44 CON A5S U1V42002 15:28 1 2.18E+02 60 SCL Shielded 2.16E+02 45 CON A1SU 1/V2002 15:29 1 3.45E+02 60 SCL Unshielded _____ 3.45E+02 48 CON A16S 1/142002 15:30 1 1.83E+02 60 SCL Shieded 1.83E+02 ____
47 CON Al W 114/2002 15:31 1 3.13E+02 SO SCL Unshielded 3.13E+02 48 CON A17S 1142002 15:33 1 1.B2E+a2 60 SCL Shielded 1.82E'02 ________I 49 CON A17Ut 1/4/2002 15:34 1 3.22E+02 60 SCL Unshieded ~ nc-::3.22E+02 .
50 CON A18S 1142002 15:35 1 1.84E+02 60 SCL Shielded _ 1.84E.02 _____
51 CON A18U 1142002 15:36 1 3.24E+02 60 SCL Unshieded 3.24E*02 52 CON A1SS 1/4/2002 15:37 1 1.91 E+02 60 SCL Shielded 1.9 IE+02 ::.
53 CON A1SU 1/4/0 115:39 1 3.07E+02 s0 SCL Unshelded_ 3.07E+02 54 CON A20S 14/2002 15:40 1 1.94E+02 60 SCL Shielded 1.94E+02 55 CON A20U 1/4/200 15:41 1 3.33E.02 so SCL Unshielded _____3.33 E+02 56 CON A21S 1//V202 15:57 1 2.23E+02 60 SCL Shielded 2.23E+02 ~
57 CON A21IU IM1/420 15:58 1 2.92E+02 so SCL Unshieded .
58 CON A22S 114/2002 15:59 1 1.72E+02 60 SCL Shielded 1.72E+02 59 CON A22U 1/4/200 16:00 1 2.80E.02 60 SCL Unshlelded 2.80E+02 .
60 CON A23S 1u4/0m 16.01 1 1.94E+02 60 SCL Shielded 1.94E.02 ____
61 CON A23U 1/4/200 16:02 1 3.29E402 so SCL Unshielded *3.29E+02 82 CON A24S 1142002 16:04 1 1.87E+02 60 SOL Shielded 1.87E.02 ~ .
83 CON A24U 114/200 16:05 1 3.48E.02 60 SC?. Unshielded q .
64 CON A25S 1/142002 18.-0 1 2.07E+02 60 SCL Shielded 2.07E+02 .
as CON A2SU 1/4/200 16..07 1 3.72E+02 60 SCL. Unshieded 66 CON A26S 1/42002 16.09 1 2.09E-e+2 60 SCL Stied ed 2.09E+02 :
67 CON A26U 1142002 16:10 i 326E+02 60 SCL Unshieldd 3.26E+02 68 CON A27S 1/4/20 16:11 1 2.07E+02 60 SCL Shielded 2.07E+02.
69 CON A27U 1142002 18:12 1 3.30E+02 60 SCL Unshielded u : -. : .. 3.30E+02 .
70 CON A28S 1/42002 16:14 1 2.30E+02 so SC?. Shielded 2.30E+02 _____
71 CON A28U 1/4/0 18:15 1 3.06E+02 eo SCL Unshielded 3.06E+02 72 CON A29S 1/42002 18:20 1 2.13E+02 60 SCL Shielded 2.13E+02 : .
73 CON A29U 1/4/2002 18 21 1 258E+02 60 SCL Unshided 2.58E+02 74 CON A30S 114t2C02 1824 1 2.33E+02 60 SCL Shielded 2.33E'-02 . ..
75 CON A30U 1/4/002 18625 1 2.89E+02 60 SCL Unshieded .... -I 2.89E+02 76 CON A31S 1142002 18:28 1 1.84E+02 60 SCL Shielded 1.84E+02 :..
77 CON A31U 114/2002 18:29 1 2.63E+02 60 SCL Unshielded '- 2.63E+02
- Source Check 1/4/2002 17:27 1 1.70EF05 60 SCL - _
U/n/mum= 1.72E2 2.22E402 Maximum- 2Lz8E+2 j3.88E+02 mean = 2.IE+2 elJ--
3.06E+02 Ir C69:401 3 45EZ1 ATTACHMENT f - /
E1?60- 19 -r- 0 it
0L2 surfaces variability measurements 3/7105 Transformer Repair Pad OW CW 487 378 490 353 516 327 503 342 415 306 419 314 471.7 336.7 43.6 26.7 OW - Open (unshielded) window CW - Closed (shielded) window atQolr'tt 94, z q00- S--O I I
0: ore'^ (w~L.>ddt' 37122N21 126188 JS4380 0 Ce (BKC 317105 8:45 1 2619 600 SCL 0 1 o 317/05 8.46 1 168171 60 SCL 0 2 OLPRKFP1O 317105 9.23 1 271 60 SCL 0
_3 OLPRKFP1C 317105 9:24 1 411 60 SCL 0 4 OLPRKFP20 317105 9:27 1 384 60 SCL 0 5 OLPRKFP2C 317105 9 29 1 267 60 SCL 0 6OUPRKFP3C 3/105 9:31 1 274 60 SCL 0 7 OLPRKFP30 317105 9:33 1 406 60 SCL . 0 fL AOLPRKfP4C 317/05 9:35 1 259 60 SCL 0
( ,r 9 OLPRKFP40 317105 9:37 1 344 60 SCL 0
)6*6t 10 OLPRKFP5C 317105 9:39 1 276 60 SCL 0 11 OLPRKFP5O 3/7105 9:41 1 371 60 SCL 0 12 OLPRKFP6C 317/05 9:43 1 279 60 SCL 0 R4rMM ;6S.44- 1 -- 0 14 OLPRKfP60 317/05 9:48 1 383 60 SCL 0 15 DSPFP1 i 317/05 9:53 1 247 60 SCL 0 16 DSBPFP1O 317105 9:56 1 368 60 SCL 0 17 DSBPFP2C 3/7105 10:13 1 267 60 SCL 0 18 DSBPFP20 317/05 10:15 1 350 60 SCL 0 19 OSBPFP3C 3/7/05 10:17 1 249 60 SCL 0 20 DSBPFP30 3/7/05 10:18 1 355 60 SCL 0
) 21 DS1PFP4C 22 DSBPFP40 23 DSBPFP5C 3/7/05 37105 3/7/05 10:21 10:22 10:24 1
1 1
258 386 292 60 SCL 60 SCL 60 SCL 0
0 0
24 DSBPFP50 3/7/05 10:25 1 388 60 SCL 0 25 DSBPFP6C 3/7/05 10:28 1 264 60 SCL 0 J 6 6 SBPFP60 31(05 10:29 1 350 60 SCL 0 27 EBPFPIC 3/7/05 10:53 1 266 60 SCL 0 28 EBPFP1O 3m7/05 10:55 1 368 60 SCL 0 29 EBPFP2C 317/05 10:58 1 289 60 SCL 0 30 EBPFP20 317105 11:00 1 444 60 SCL 0 31 EBPFP3C 3m7/05 11:03 1 289 60 SCL 0 32 E3PFP30 317/05 11:04 1 335 60 SCL 0 33 EBPFPAC 3/7/05 11:07 1 293 60 SCL 0 34 E3PFP40 3/7/05 11:08 1 338 60 SCL 0 35 EBPFP5C 3/7105 11:11 1 265 60 SCL 0 36 EBPFP5O 3m05 11:13 1 331 60 SCL 0 37 EBPFP6C 3/7/05 11:16 1 295 60 SCL 0 38 EBPFP60 317/05 11:17 1 374 60 SCL 0 39 TRPFPIC 31705 13:13 1 378 60 SCL 0 40 TRPFP1O 3)705 13:15 1 487 60 SCL 0 Al TRPFP2C 31/05 13:17 1 353 60 SCL 0 42 TRPFP20 3/7/05 13:19 1 490 60 SCL 0 43 TRPFP3C 317/05 13:21 1 327 60 SCL 0 42 44 TRPFP30 45 TRPFP4C 46 TRPFP40 3/7/05 37/05 3/7/05 13:22 13:24 13:26 1
1 1
516 342 503 60 SCL 60 SCL 60 SCL 0
0 0
47 TRPFP5C 3/7/05 13:27 1 306 60 SCL 0 48 TRPFP50 3/7/05 13:29 1 415 60 SCL 0 49 TRPFP6C 317/05 13:31 1 314 60 SCL 0 50 TRPFPBO 3/7/05 13:32 1 419 60 SCL 0 46oc CA u. f g -3
,r9o - O 5- 0 h To hadIV NC02'Vd AII IOI3U ' No 0SIMISL1E SE2 E St:t SOOZ/80/EO
0RIGIWIAiL Exhibit I MA8-5 I Survey Unit Location Miscellaneous Concrete Structures within OL2 1225 lInspection Team Members I D. Sarge lION:2;! RVEYUNITiNS1PEC1T;I Inspection Requirements (Check the appropriate Yes/No answer.) Yes No I N/A
- 1. Have sufficient surveys (.e., post remediation, characterization, etc.) been obtained for the survey unit? X
- 2. Do the surveys (from Question 1) demonstrate that the survey unit will most likely pass the FSS? X
- 3. Is the physical work (i.e., remediation & housekeeping) In or around the survey unit complete? X
- 4. Have all tools, non-permanent equipment, and material not needed to perform the FSS been removed? X
- 5. Are the survey surfaces relatively free of loose debris (i.e., dirt, concrete dust, metal filings, etc.)? X
- 6. Are the survey surfaces relatively free of liquids (i.e., water, moisture, oil, etc.)?
- 7. Are the survey surfaces free of all paint, which has the potential to shield radiation?
. Have the Surface Measurement Test Areas (SMTA) been established? (Refer to Exhibit 2 for instructions.)
- 9. Have the Surface Measurement Test Areas (SMTA) data been collected? (Refer to Exhibit 2 for Instructions.) X
- 10. Are the survey surfaces easily accessible? (No scaffolding, high reach, etc. is needed to perform the FSS) X
- 11. Is lighting adequate to perform the FSS? X
- 12. Is the area industrially safe to perform the FSS? (Evaluate potential fall & trip hazards, confined spaces, etc.) X
- 13. Have photographs been taken showing the overall condition of the area? X
- 14. Have all unsatisfactory conditions been resolved? X NOTE: If a 'No' answer is obtained above, the Inspector should immediately correct the problem or Initiate corrective actions through the responsible site department, as applicable. Document actions taken and/or Justifications In the 'Comments section below. Attach additional sheets as necessary.
Comments:
Response to Question 5:
The top surface of the concrete requires cleaning prior to FSS. Notified L. Shamenek.
Survey Unit Inspector (printsign)
Survey Designer (print/sign)
DavidSarge/ Date Date
[ 3/15/05
_C, ',
Appendix C COMPASS DQA Report Survey Unit OL2-1
DQA Surface Soil Report Assessment Summary Site: OL2-SYW SuJ I ?.AU Planner(s): WJCooper Survey Unit Name: 012-1 Land outside Westinghouse area Report Number I Survey Unit Samples: 11 Reference Area Samples: 0 Test Performed: Sign Test Result: Not Performed Judgmental Samples: 0 EMC Result: Not Performed Assessment
Conclusion:
Reject Null Hypothesis (Survey Unit PASSES)
Retrospective Power Curve "1
. osI * -II-- - - __ __ __ - -A- -
- 0.8
- ____ ____ ____ ____ 1.*
Cr -ii- __ __ __ -
-I - __- -
a 0.
.21:.... __ __ __
-:1- - _____ _____ _____ I.
_ 0.4
-- 4-I" 0.2
-it-- -__ __
1 5..
0.0 05 1.0 15 2.0 25 3.0 35 4.(0 4.5 Soil Concentmftion (sCpg), including background
-. - Prospective Power
- 1-beta - I f- Actual Power
- LBGR -- Estimated Power
- DCGL --- Retrospective Power Appendix C OL2 COMPASS v1.0.0 6J2712005 Page I
DQA Surface Soil Report Survey Unit Data NOTE: Type = S' indicates survey unt sample.
Type = 'R" indicates reference area sample.
Sample Number Type Cs-137 (pCI~g) 1 S 0.08 2 S 0.07 3 S 0.32 4 S 0.28 5 S 0.22 6 S 0.1 7 S 0.38 8 S 0.49 9 S 0.1 10 S 0.12 11 S 0.31 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=1 1 Mean (pCVg) 0.22 NIA 0.3 Median (pCVg) 0.22 NIA N/A Std Dev (pCVg) 0.14 N/A 0.24 High Value (pCig) 0.49 N/A NIA Low Value (pCVg) 0.07 N/A N/A Appendix C OL2 COMPASS v1.0.0 612712005 . age 2
Appendix D COMPASS DQA Report Survey Unit OL2-2
DQA Surface Soil Report Assessment Summary Site: O1-2-SU-P -S(1;Q Planner(s): WJCooper Survey Unit Name: 0L2-2 Report Number: 1 Survey Unit Samples:
Reference Area Samples: 0 Test Performed: Sign Test Result: Not Performed Judgmental Samples: O - - -EMC Result: Not Performed Assessment
Conclusion:
Reject Null Hypothesis (Survey Unit PASSES)
Retrospective Power Curve u.
- . I W.0.8 I-__
~0.7
- 0.6 I- -I - I_
0.4 =F-----
- &..0.
. 0.7 _ _ -. _
c 02 s: O 0 1 2 3 4 S Soil Conwentration (pCi'g), ixluding background
-. - Prospectve Power K 1-beta --- ActualPower
- LBGR -- Estiated Power
- DCGL --- Retrospective Power Appendix D OL2 SS l.0. 6171205 P ge.
COMPASS v1.0.0COMP 612712005 Page I
DQA Surface Soil Report Survey Unit Data NOTE: Type = "S" indicates survey uni sample.
Type = 'R' Indicates reference area sample.
Sample Number Type Cs-137 (pCI/g) 1 S 0.05 2 S 0.08 3 S 0.07 4 S 0.35 5shallow S 1.09 6 S 0.2 7 S 0.07 8 S 0.06 9 S 0.12 10 S 0.17 11 S 0.08 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=11 Mean (pCVg) 0.21 N/A 0.7 Median (pCVg) 0.08 N/A N/A Std Dev (pCl/g) 0.30 N/A 0.65 High Value (pCig) 1.09 N/A N/A Low Value (pCVg) 0.05 N/A N/A Appendix D OL2 6/2712005 Page 2 COMPASS vI.0.O COMPASS v1.0.0 6127t2005 Page 2
Appendix E COMPASS DQA Report Survey Unit MA8-5
k- DQA Building Surface Report Assessment Summary Site: MA8-5 Planner(s): WJCooper Survey Unit Name: Transformer Repair pad & misc concrete Report Number. I Survey Unit Measurements: 11 Reference Area Measurements: 0 Test Performed: Sign Test Result: Not Performed Judgmental Areas: O EMC Result: Not Performed Assessment
Conclusion:
Reject Null Hypothesis (Survey Unit PASSES)
Retrospective Power Curve aP 1 0;
4 0.8 I I I '011
- 0.6 : I I T I I it 4 . j
- 03
. j .
- . 0.3 b~~ I -1 < ~
. f _
. ii a 0.1 .I . f O
0 SOO 100(3 1500 2000 2500 3000 3500 4000 Net Beta (cpm)
-, - Prospective Power
- l-beta -- - Actual Power
- LBGR - - Estimated Power
-DDCGL --- Retrospective Power Appendix E OL2 / MA8-5 COMP SS l.0. 6171205 P ge COMPASS v1.0.0 6/27/2005 Page I
DQA Building Surface Report Survey Unit Data NOTE: Type = S indicates survey measurement Type= IR' indicates reference measurement.
Measurement Material Type Gross Beta (cpm) 1 Repair pad concrete S 378 2 Repair pad concrete S 366 3 Repair pad concrete S 358 4 Repair pad concrete S 360 5 Repair pad concrete S 332 6 Repair pad concrete S 439 7 Repair pad concrete S 446 8 Repair pad concrete S 341 9 Repair pad concrete S 405 10 Repair pad concrete S 456 11 Repair pad concrete S 359 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=11 Mean (dpm/100 cm2 ) 276.58 N/A 135 Median (dpm/1 00 cm') 166.29 NIA N/A Std Dev (dpW/100 cn9) 248.79 N/A 51.1 High Value (dpm/100 cm2) 676.49 N/A N/A Lov Value (dpm/1 00 cm2) -26.46 N/A N/A Appendix E OL2 / MA8-5 COMPASS vl.0.0 6/2712005 Page 2
Appendix F Concrete Survey Design Revision 1
r- SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-05-011 I e/, 4 I of 9 Subject Westinghouse and Adjacent Areas MAS5 concrete pads In 0L2 - Survey Design Question 1 - Is this calculation defined as In QA Scope? Refer to definition 3.5. Yes 0 No 0 Question 2 - Is this calculation defined as a Design Calculation'? Refer to definitions 3.2 and 3.3. Yes 0 No 0 NOTES: If a Yes' answer is obtained for Question 1, the calculation must meet the requirements of the SNEC Facility Decommissioning Quality Assurance Plan. If a 'Yes' answer is obtained for Question 2, the Calculation Originator's knmediate supervisor should not review the calculation as the Technical Reviewer.
DESCRIPTION OF REVISION Revision 1: added Attachments 2-3 and 2-4 for DCGL w Calculation Logic. Revised text to reference these new attachments. Only the revised pages and new attachments are included here. Page numbers refer to original revision pages. Table 2 checklist is not included since no substantive changes have been made.
-_ APPROVAL SIGNATURES Calculation Originator W. J. Cooper CHPI Date Technical Reviewer T. Tritchl Date Additional Review A. Paynterl Date E2 ,-%Cos Additional Review Date
- SNEC CALCULATION SHEET -
Calculation Number Revision Number Page Number E900-05-011 I 1 Page 2 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in OL2 - Survey Design 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for the residual concrete surfaces in the Saxton Nuclear Experimental Corporation Westinghouse and adjacent open land areas that are located north of the SNEC facility site. The area (012) is approximately 5300 square meters, and is a Class I survey area. Because the survey area exceeds the 2000 square meter limitation in the SNEC LTP (Reference 3.5) Table 5-5 for maximum class 1 open land survey unit area, this survey area is subdivided into three survey units:
1.1.1 MA8-5, consisting of the concrete OTransformer Repair Pad" at the north end of the area, the drainage headwall in BE128 and the nearby well head concrete surfaces with approximately 70 square meters of concrete surface. MA8-5 is separately classified as a Class 3 survey area per the LTP table 5-2.
1.1.2 012-1, which consists of the roughly 20 meter wide by 100 meter long arc of open land outside the Westinghouse area fence and bounded by portions of OL10 and 0L4, and 1.1.3 0L2-2, consisting of the roughly 50m by 60 m by 78 m triangular open land area inside the Westinghouse area fence. This survey design applies only to the residual concrete surfaces in the survey area.
1.2 The design for the open land areas, 012-1 and 0L2-2, will be provided in a separate calculation (E900-05-009) for simplicity and this survey design applies only to the exposed concrete surfaces in the 012 area. The general layout of this survey unit is shown on Attachment 1-1.
1.3 An approximately 1525 square meter portion of 0L2 that is inside the switchyard fence will be surveyed with the rest of the switchyard under a separate design package.
1.4 Fences present in and / or bordering the OL2 area will be surveyed under a separate generic fence survey design package.
1.5 A portion of the transformer repair pad lies outside of 012, within the MARSSIM class 2 area 0L12. The entirety of the pad is to be surveyed as class 3 under this design for simplicity. This does not imply the classification of that portion of the pad is changed between the two open land survey areas..
2.0
SUMMARY
OF RESULTS The following information should be used to develop a survey request for this survey unit. The effective DCGLw value is listed below. This value is derived from previously approved derived values for "CV Yard Soil and Boulder Samples" in Reference 3.15. The US NRC has reviewed and concurred with the methodology used to derive these values. See Attachment 2-1, 2-3 and 2-4 and Reference 3.9.
Table 1, DCGLw Values I Gross Activity DCGLw(dpml100 cm') I 26445 (19834 A.L.)
NOTE: A.L is the site Administrative Limit (75% of effective DOCGLw)
SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-011 1 Page 7 of 9 Subject Westinghouse and Adjacent Areas MA8-5 concrete pads in OL2 - Survey Design 4.11 No special area characteristics including any additional residual radioactivity (not previously noted during characterization) have been identified in this survey area.
4.12 The decision error for this survey design is 0.05 for the a value and 0.1 for the P value.
4.13 'Special measurements" (as described in the SNEC LTP) are not included in this survey design.
4.14 No additional sampling will be performed IAW this survey design beyond that described herein.
4.15 SNEC site radionuclides and their individual DCGLw values are listed on Exhibit I of this calculation based on Table 5-1 of Reference 3.5.
4.16 The survey design checklist is listed in Exhibit 2.
4.17 Area factors are shown as part of COMPASS output (see Attachment 7-1) and are based on the Cs-137 area factors from the SNEC LTP.
5.0 CALCULATIONS 5.1 All calculations are performed internal to applicable computer codes or within an Excel (Reference 3.13) spreadsheet.
6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey unit MA8-5.
6.2 Attachment 2-1, 2-3 and 2-4 are the DCGLw calculation logic for the survey unit from Reference 3.15 and Attachment 2-2 is the estimate of effect on efficiency of the irregular surface.
6.3 Attachment 3-1, is a copy of the calibration data from typical GFPC radiation detection instrumentation that will be used in this survey area.
6.4 Attachment 4-1, is the MDCscan calculation sheet for concrete surfaces in dpm/100cm2 .
6.5 Attachment 5-1, is not used 6.6 Attachment 6-1 to 6-2, show the randomly picked scan locations (from VSP) and reference coordinates for the survey unit areas.
6.7 Attachment 7-1 through 7-3, are COMPASS output for the survey unit showing the number of sampling points in the survey unit, area factors, and prospective power.
6.8 Attachment 8-1, is the surface variability results for concrete surface measurements from the Williamsburg station (Reference 3.15). Attachment 8-2 and 8-3 are the 317105 survey data in the survey unit.
6.9 Attachment 9-1, is the results of the inspection report for the MA8-5 portion of the OL2 area
CV YARD SOIL BOULDERS TABLE 3 - REDUCED LISTING - DECAYED - MDA's REMOVED (ExceDt Cs-1 37)
SNEC Sample No LAB No. LocatlonlDescrtptlon H-J Sr-99 Co-60 Ca-17 Total cCUg I CV Tunnet BWXT, 01020594.1 CVTanrMelSectrtComposne.0L1 9.01E+00 8.59E-01 1.17E+03 1178 89 2 SX9SL99219 111074 Suaufhoe Sanple #29 (0-5). AY-128. O1. 5.36E-01 0 54 3 SXSL10S3 Teledyne-it0018; L191i81 NorthCVY rdSo EBA-127. 817 EL Semplee# S.01.2 4.20E+00 8.55E-01 505 4 SXSL1089 Teledyne-8001S; L19184-2 NorthCVYard Sol AY-127, 81t ELSample 43.01.1 2.78E+00 1.24E+00 4 02 8 SXSL1115 Teldyn8e-0020; L191843 North CV Yarrd SoSAY128. 804 ELSoL01.1 4.47E+00 1.74E+00 6 21 8 SXS11122 Teledyne-80021; 1.184J4 North CVYadSodAY.129.7W ELSample # 2,OLt 3.1SE+00 4.60E+00 7.76 7 SXSLI130 Teledyne-80022; LI 184-5 North CV Yed Sol AX-129. 803 Et Sample # 4. 01.1 4.58E+00 2.44E-02 2.1 8E+01 28 42 8 SXSL1132 Teledyne-80023; Lilli84 North CV Yard Sol AZ-130, Samoe #5.01.1 2.73E+00 2.50E+00 523 S SXSLI270 BWXT, 0108056-02 AX.129,3-3, Sol, CVSE Sidte From CV, 80 El,. OL1 2.18E+01 2182 10 SXSLI281 BWXT, 010805641 AX.128.3.1, Sol, CV TLanelEast 5 From CV, 80EWt01.1 4.14E+00 4 14 11 SXSL2849 Teledyne-73220; L18077-2 Anuli Weai,A-2, 5to 1 Depth. 01.1 5.74E-01 0 57 13 SXSL2871 Teledyne.71S49; L17838-11 CVrea
- EastYard Dlt File.-Mdse. 12 Way tUp.O1 5.37E-01 0 54 14 SXSL2872 Teledyne-71948; L17838.10 CVArea- East Yard DiO Pi. Bottom (also top citer), 01.1 9.58E-02 010 15 SXSL3140 BWXT.130-003-10-01 East CVYard. Soil PFte CD on West Se (S Depth). 01 7.99E-01 0 60 18 SXSL3142 Teledyne; 12032683 8ol Pile. CVYard. Three Feet on East Sde, SR-37. 01.1 5.81E-01 058 17 SXSL3145 BWXT,1030-003-10-01 East CV Yarct Solt Pile a 3on East Side (e Depth), OL1 1.22E+00 1+22 18 SXSL3149 Teledyne; 1203264 Sl Pile. CVYard. Six Feeton East Side, SR-37,0L1I 2.90E-01 029 19 SXSL3153 BWXT,1030-003.10-01 East CV Yard. Sol Ple a Top (6 Dep). 001 2.91EO01 029 21 SXSL4142 Teledyne; 122187.2 CV Yard Sol -West Sie. API-7. 01.1 8.94E-01 0 89 22 SXSL4143 Teledyne; 122187.3 CV Yard Soil -West Side, API-7, 01 4.97E01 050 23 SXSL4149 Teledyne: U221874 CVYwrdSol -WestSide.AP1-7.0L1 6.74E-02 3.87E+00 394 TABLE 4 - % OF TOTAL CALCULATION SNEC Sample No LAB No. Locatlon/Description H-3 Sr-to Co-00 Ca.137 Total I CV Tulnet BWXT,0102059-01 CV Tuno Sedinit Composlte. OL1 0.76% 0.07% 99.16% 1000%
2 SX9SL99219 111074 S "#facs S 0 2 (0MI, AY.128, 0.1 l 100.00% 1000%
3 SXSL1083 Teledyne-80018; L1.91UI NorthCVYardSolBA-127.81El.Sanple#5. OL2 83.07% 16.93% tott%
4 SXSLI089 Tetedyne-80t1S; 1.1184.2 North CVYard SodlAY-127. 81t El. Sample 3.01.1 69.04% 30.96% 1000%
6 SXSL1115 Teledyne-80020; LI 9184 3 North CVYard SdAY-128, 804 El. Sempb #2,0.OL1 72.02% 27.98Vs 1000%
6 SXSL1122 Teledyne-80021; 19184-4 North CVYard Sol AY-129,7W El Sample # 2.OL1 40.65% 59.35% 1000 7 SXSL1130 Teledyne-80022; L1918-6 NorthCV Yard So AX-129. 80 El. Sample #44.OL1 17.32% 0.09% 82.59% 1oo00 8 SXSL1132 TeledyneJ80023; L1S1U84- Noth CVYard Sol AZ-130. Sample # 5,01. 52.22% 47.78% 100.0%
S SXSL1270 BWXT,0108055-02 AX-129, 3-3, SodlCVSE Side 5SFrom CV. 00 EL,.OL1 100.00% 1000%
10 SXSL1281 BWXT,0108056-01 AX-128. 3-1. Sol. CV Tunoel East From CV, 800 EL01.1 100.00% 1000%
11 SXSL2849 Tel ne n220; L118077-2 mAfis Wai. A-2 Sto la Depth 01.1 _ 100.00% 1000%
-4 - 13 SXSL2871 Teledyne-71949; .17838.11 CVArea- EastYard Din Pile Mdbe. 112Way Up. 01.1 100.00% 1000%
C.-,, CX CIIZL . I, 14 SXSL2872 Teledyne.71948: .17838-10 CV AresaEast Yard DikPbe-Bottom (also top canter), OL 100.00% 1000%
Q 16 SXSL3140 BWXT,10304003-10-01 East CV Yard. Sol PIle C e on West Sitde(8 Depth). 01.1 _ 100.00% 1000%
16 SXSL3142 Teledyne: 120328-3 Sol Pile, CVYard. Three Feet on East Side. SRJ37. 01.1 100.00% 1000%
I ("
17 SXSL3145 BWXT,10-00W3-1O01 East CV Yart Sol Ple @S on East Side (S Depth). 0L1 O 100.00% 1000%
(1.117- 18 SXSL3149 Teledyne 1032684 Soil Ple. CV Yard. Six Feet on East Side, SR-37, 01.1 100.00% 1000%
\', Z' 1S SXSL3153 BWXT,1030-003.10-01 EastCVYard. Sol Pie OTop (6t Depth). 01.1 - 100.00% 1000%
('s 21 SXSL4142 Teledyne; 122187-2 CV Yard Sol -West Side. AP1-7. 01 100.00% 1000%
1 7 22 SXSL4143 Teledyne; 122187.3 CV Yard Soi- West Sidt, API-7, 01.1 100.00% 1000%
C,- C-' 23 SXSL4149 Teledyne; L221874 CV Yard Soi Westb de.API .7. OLI _ 1.71%h 98.29% 1000%
Mean=~ 0.557207 1 0.007643 0.00625 l 0.839541 1-41 Sigma- o.241 1 0.009 0.284iu Mean %ofTotel= 39.50% I 0.54% l 0.44% 59.51% 100.00%
\4 2 S"gmaMean=* 1.04E+00 7.64E-03 2.50E-02 1.41E+00 248
% of Total= 41.91% 0.31% 1.01% 56.77% 100.00%
DCGLw Calculation Logic
- 1. Survey Unit: Remaining OL2 Concrete MA8-5, Class 3 Area II.
Description:
The purpose of this calculation is to determine a representative mix from available sample analyses results for the Transformer Repair Pad.
The effective surface DCGLw is then determined in accordance with guidance provided by the SNEC License Termination Plan (LTP) and MARSSIM.
Ill. Data Selection Logic Tables: The radionuclide selection logic and subsequent DCGLw calculations are provided in the tables described below.
These tables were developed using Microsoft Excel and are validated in SNEC calculation E900-03-012. Table explanations follow:
Attachment 2-3: Data Listing - This table provides a list of the most representative sample analyses from the original SNEC land area including data from OL2. Since any contamination on the pad would be most likely from the SNEC yard area, mix data from the SNEC yard is chosen to represent the fence contamination. Results are from scoping and characterization surveys. The samples consist of soil media that was taken in support of the aforementioned surveys. As applicable, a sample number, sample location, description, radionuclide concentration, and analysis date are provided for each sample.
Table 3 on Attachment 2-3 lists applicable sample results, decay corrected to 2004.
Table 4 on Attachment 2-3 shows the mean % of the total activity contributed by each isotope. These values (bottom of table 4) are then used in Attachment 2-1 to derive the weighted adjusted surrogate DCGLw.
Attachment 2-1: Effective DCGLw Calculator for Cs-1 37 (in dpm/1 00cm2)
- This table provides the surrogate Cs-1 37 DCGLw calculation results for data derived from Attachment 2-3. It uses the ratios between the nuclides weighted for the DCGLs to determine an effective surrogate Cs1 37 DCGL.
IV. Summary - Since the survey area is concrete, the release limit is based on the surface DCGLw. Using the above logic tables the calculated Cs-1 37 surface DCGLw is 26445 dpm/1OOcm 2 . This value would be reduced by 25%
as part of the SNEC facilities requirement to apply an administrative limit of 19834 dpm/1OOcm 2 as discussed in the License Termination Plan (LTP).
Attachment 2-4 E900-05-011