Survey Area: Survey Unit: Overview: BSA 03-01, 812512015 PageP-l of6 HDP-PR-FSS-701, Final Status Survey Plan Development (Revision 8) APPENDIX P-3 FSS PLAII BSA 03 Description: Plant Soil Area. Open Land Area 0l Description: Subsurface Soils under Building 231 The Survey Unit (SU) identified as Building Survey Area (BSA) 03-01 has been prepared for Final Status Survey (FSS) by the Hematite Decommissioning Project (HDP). Although designated as a BSA in the HDP Decommissioning Plan, this SU addresses the subsurface soils underlying Building 231. Therefore, this FSS approach is more akin to a modified Land Survey Area (LSA) implementation. This appendix provides an overview of the proposed FSS implementation as well as general and specific instructions for the technicians responsible for performing the FSS. o Data Quality Objectives l. Health Physics (HP) personnel performing FSS duties meet the qualifications listed in HDP-PR- HP-102 Health Physics Technician Training and have received training and instruction commensurate with their duties. The Radiation Safety Officer has approved all FSS personnel to perform work associated with their individual roles and responsibilities. Training records are documented in accordance with HDP-PR-GM-020 Training Material Development and D ocume nt ation of Tr aining. 2. All HDP FSS procedures ("700 series") have been reviewed, revised, and validated in order to ensure performance of actual FSS work activities reflect the requirements detailed in the individual FSS Procedures and the HDP Decommissioning Plan (DP). 3. All FSS instrumentation has undergone a receipt inspection by HDP Quality Assurance personnel, is within current calibration, and is determined to be functioning within acceptable ranges based on initial set-up and daily source checks in accordance with HDP-PR-HP-411 Radiological Instrumentation. HP technicians will confirm that environmental conditions (e.g. operating temperature range, no standing water) are acceptable for use of field instrumentation. o Location BSA 03-01 is designated Class 2 and is located in the Plant Soil Surrogate Evaluation Area (SEA) directly underneath Building 231. Scan MDC calculations were not necessary since there is no exposed soil (i.e., no pipe removal trenches) in Building 231 for which a gamma walkover survey would be required. Laboratory analysis for Tc-99 will be performed on all final status survey samples and as such, the adjusted U-235 DCGL values will not be used to demonstrate compliance with the final status survey dose criteria. The area of BSA 03-01 is HDP Satellite site view: 558 m2. The eight (8) FSS sampling locations BSA 03-01 in red crosshatching (Building 231) within BSA 03-01 were based on a systematic random-start triangular grid spaced over the footprint of the building - 558 m2. Quality Record Westinghouse Non-Proprietary Class 3
Transcript
Survey Area:Survey Unit:
Overview:
BSA 03-01, 812512015 PageP-l of6
HDP-PR-FSS-701, Final Status Survey Plan Development (Revision 8)APPENDIX P-3
FSS PLAII
BSA 03 Description: Plant Soil Area. Open Land Area0l Description: Subsurface Soils under Building 231
The Survey Unit (SU) identified as Building Survey Area (BSA) 03-01 has been prepared for FinalStatus Survey (FSS) by the Hematite Decommissioning Project (HDP). Although designated as aBSA in the HDP Decommissioning Plan, this SU addresses the subsurface soils underlying Building231. Therefore, this FSS approach is more akin to a modified Land Survey Area (LSA)implementation. This appendix provides an overview of the proposed FSS implementation as wellas general and specific instructions for the technicians responsible for performing the FSS.
o Data Quality Objectives
l. Health Physics (HP) personnel performing FSS duties meet the qualifications listed in HDP-PR-HP-102 Health Physics Technician Training and have received training and instructioncommensurate with their duties. The Radiation Safety Officer has approved all FSS personnel
to perform work associated with their individual roles and responsibilities. Training records are
documented in accordance with HDP-PR-GM-020 Training Material Development andD ocume nt ation of Tr aining.
2. All HDP FSS procedures ("700 series") have been reviewed, revised, and validated in order toensure performance of actual FSS work activities reflect the requirements detailed in theindividual FSS Procedures and the HDP Decommissioning Plan (DP).
3. All FSS instrumentation has undergone a receipt inspection by HDP Quality Assurancepersonnel, is within current calibration, and is determined to be functioning within acceptableranges based on initial set-up and daily source checks in accordance with HDP-PR-HP-411Radiological Instrumentation. HP technicians will confirm that environmental conditions (e.g.
operating temperature range, no standing water) are acceptable for use of field instrumentation.
o Location
BSA 03-01 is designated Class 2 and is locatedin the Plant Soil Surrogate Evaluation Area(SEA) directly underneath Building 231. ScanMDC calculations were not necessary sincethere is no exposed soil (i.e., no pipe removaltrenches) in Building 231 for which a gammawalkover survey would be required.Laboratory analysis for Tc-99 will be performedon all final status survey samples and as such, theadjusted U-235 DCGL values will not be used todemonstrate compliance with the final statussurvey dose criteria. The area of BSA 03-01 is HDP Satellite site view:558 m2. The eight (8) FSS sampling locations BSA 03-01 in red crosshatching (Building 231)
within BSA 03-01 were based on a systematicrandom-start triangular grid spaced over the footprint of the building - 558 m2.
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o Background
Building 231 (constructed between 1996 and 1998) was and continues to be used a coveredwarehouse for storage of facility materials and equipment. Some shipping container refurbishmentwas performed in this area. The land area comprising BSA 03-01 was initially considered a Class 3
SU in zosr DP drawings and tables. However, since there was at least one drawing which indicatedsubsurface soils under buildings as Class 2, the more conservative classification has been selected.Since BSA 03-01 is classified as Class 2, there is low probability that this subsurface soil willexceed the Uniform Stratum DCGLs. Isolation and control measures are minimal since the subjectarea is underlying Building 231. After collection of FSS samples, boreholes will be covered orpatched.
Subsurface soil samples under Building 231 collected during earlier site characterization activities(Hematite Radiological Characterization Report, HRCR, 2009) were reviewed and supported theinitial DP Class 3 classification and compliance to the (lniform Stratum DCGLs. An eight (8) pointrandom-start systematic triangular sampling grid was developed for BSA 03-01 based on thestatistical evaluation of the twenty-six sample results collected during the HRCR.
o Criteria
All FSS analytical results for samples collected within BSA 03-01 will be evaluated against theUndorm Stratum CSM DCGLs. FSS sampling is implemented using the "Three-Layer" multi-CSM, however analyical results will be conservatively evaluated using the UniformStratum DCGLs.
1 t i':i a tr iitRadium-226+C' :' ! 1.9Technetium-99 25.1Thorium-232+C" ;',i.l,i 2.0Uran um-234 195.4Uran um-235+Dc :'..1t,t 51.6Uran um-238+Dc .\ 168.8
Tablc adapted from HDP FSS Procedurc HDP-PR-FSS-70 P lan Deve loomert- Revisionadapted from HDP FSS Procedurc HDP-PR-FSS-70 I Final Status Sumey Plan Developmerr, Revision 8, August 20 I 5bThe reported DCGL*s are the activities for the parent radionuclide as specified and were caiculated to account forihe dose contributionfrom insignificant radionuclides."+D indicates the DCGL* includes short-lived (half-lif'e S 6 mo.) decay productsd+C indicates the DCGL* includes all radionuclides in the associated decav chain.
o Implementation
As a Class 2 SU, BSA 03-01 would typically require a minimum 10% GWS using an uncollimated2" x2" sodium iodide (NaI) detector. However, BSA 03-01 is a special case in that the subject soilsunderlie the concrete floor slab of an occupied building. FSS technicians will document the grosscount rates at each borehole location using a NaI detector and take a 1-minute static measurement onexposed soil before sample collection. There is no piping underlying Building 231.
Based on a statistical evaluation of the HRCR dataset, an eight point sampling size was calculated;each systematic location was determined by using GIS software to produce a random-start triangular
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gr]d nSttern with spacing appropriate for the SU size (558 m2) and number (8) of locations. TheBSA 03-01 is an unexcavated land area, therefore, a total of eight surface ,i.utu, and eight rootstratum composite samples will be collected at all systematiclocations. Samples will also becollected from the top six inches of the deep stratum (1.50 m - 1.65 m bgs) flr archiving, andanalyzed only if the overlying root stratum sample result in a given location eiceeds a SoF of 0.5.Two (2) QC duplicate samples (at least 5%o of the total number of samples) will be collected withinBSA 03-01.
FSS IMPLEMENTATION SUMMARY TABLEGamma Walkover
Not applicable (N/A); document the on-contact surface soil NaI count rate at eachborehole location as a 1-minute static countmeasurement prior to sampli
Scan MDC (2" x 2" Nal N/A (no pipe removal trenches to scanInvestigation Action Level (lAL N/A** (no pipe removal trenches to scan
tic Sam Locations:Number of Comments
These samples will be collected on asystematic triangular grid.
***Excavation stratum samples will bearchived and analyzed only if the
associated root stratum result exceeds aSOF of 0.5.
0- 15 cm (Surfacel5 cm - 1.5 m (Root
> 1.5 m (Excavation)
Collection of biased samples is not anticipated at this time; however, if elevated measurements areidentified during the floor scan (BSA 03-03) in Building 231, additional boreholes may beselected within BSA 03-01 for the purposes of biased sampling.
InstrumentationLudlum 2221 with 44-10 (2x2 Nal) detector; withcollimation for investigations
Used to obtain static count rates atborehole openings prior to sampli
*values based on information provided i@of the Scanning Minimum Detectable Concentrations IMDC) fo
" Evaluation and Documentation
**IAListhenetcountperminute1ncpm@concentrationlessthaffiuniform stratum DCGLw derived from the technical bases presented in HEM-MEMo-15-021and HDP-TBD-FSS-003 "Modeling and Calculation of Invistigative Action Levels for FinalWll iyllsy Units" (Rgvision l), Westinghouse, June 2015.
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General Instructions:
l. Summarize daily work activities on the log sheets provided in Appendix P-6. Provide a description ofsite conditions (including the condition of isolation controls), samples collected and the status of gammasurveys at borehole openings for every shift that involves work in this survey unit. Document thesurveyor name and instrumentation used for each borehole location in Appendix P-6 for reportingtraceability. In the event that a situation arises where the survey instructions cannot be followed as
written, stop work and contact the FSS Supervisor for resolution. All changes to the survey instructionsshall be approved by the RSO before continuing work and be documented in the FSS Field Log.
2. In accordance with HDP-PR-FSS-701, Final Status Survey Plan Development (Sec. 5.4.2),documentation of activities performed, equipment used, and potential safety hazards that may beencountered during the performance of characterization activities (along with associated controls) will bedocumented using the FSS Daily Task Briefing log sheet.
3. Since there are no pipe removal trenches in Building 231, a gamma walkover survey (GWS) will be notbe performed.
4. In accordance with HDP-PR-HP-411 Radiological Instrumentation, conftm that FSS instrumentation iswithin the current calibration period, has been daily source checked, and environmental conditions areacceptable for use as per the manufacturer's recommended operating parameters.
5. Verify that isolation controls established in accordance with HDP-PR-HP-602 Data PackageDevelopment and Isolation and Control Measures to Support Final Status Survey are in place prior tothe start of FSS. Ensure isolation controls include, as necessary, the use of stanchions, "Caution" tape,or rope to alert Building 231 personnel to keep a safe distance from the soil collection work areas. Plasticsheeting will be used to protect the floor from recovered borehole spoils.
6. One-minute static gamma count rates on contact with the surface soil at each borehole location will bedocumented using a 2"x2" Nal detector before sample collection. Document the borehole conditions inthe FSS Field Log.
7. BSA 03-01 is a Class 2 Survey Unit. Each of the eight (8) sample locations were systematically spacedon a random-start triangular grid pattern using spreadsheet and GIS software. Boreholes will bephysically marked inside the building using measuring tape to locate pre-determined X-Y coordinates (infeet) based on a starting point (origin) set to the southwest corner of Building 231. However, all samplelocations will eventually be conelated with standard coordinates (Missouri East state plane, NAD 1983)for reporting purposes. In the case of inaccessible sampling locations, additional sample coordinatesmay be generated with the FSS Supervisor's and RSO's approval in order to identify acceptable alternatesampling locations.
8. A map of the survey unit showing predetermined sample locations with associated X-Y grid coordinateswill be generated. A copy of the sample map and survey locations will be attached to the surveyinstruction.
9. Perform daily pre and post QC source checks in accordance with HDP-PR-HP-416 Operation of theLudlum 2221for Final Status Survey.
10. A soil sample will be collected from each location and depth as determined in the provided AppendixP-4. The random sample locations will include eight (8) samples taken at a depth of 0 - 15 cm (surface),eight (8) samples collected at a depth of 15 cm - 1.5 m (root), and eight (8) samples collected at a depth
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of 1.5 m to 1.65 m (excavation).
NOTE: If trash, waste, or other non-native materials are observed during sample collection, stopsampling activities and notify HP Supervision (or Radiological Engineeringf b"frr" collectingsamples at any sample Iocation in the unit.
I l. All samples collected as part of this survey will be analyzed at an off-site laboratory by gammaspectroscopy for radium, thorium, and uranium, and ICp-MS for Tc-99.
Specific Instructions:NOTE: Unless otherwise indicated, the performance of these specific instructions is the responsibility of theHP Technician.
Before Beginning Work1. Rad. Engineer/[IP Technician: Verify, each shift, that isolation controls, established in accordance
with HDP-PR-HP-602, are in place prior to the start of FSS using the Daily Task Briefing log sheet.
2. Rad Engineer/[IP Technician: Verify that survey instrumentation is within the current calibrationperiod by checking the calibration due date for each piece of instrumentation used for FSS. performdaily pre- and post-survey daily source checks for handheld survey instrumentation in accordance withHDP-PR-HP-411. Confirm that environmental conditions in which the survey will be performed arewithin the manufacturer's recommended operating range (e.g. temperature betwien -4" F t; D2" F).
3. Rad. Engineer/IlP Technician: Perform a daily task-specific briefing; documenting the attendants,planned work activities, anticipated hazards, and controls on the FSS Dail-y Task Briefing log sheet.NOTE: Since soil sampling to a depth greater than one foot is required, ensure HDp Safety &Health is made aware of the activity and subsurface utilities for Buildi ng23l have been identifiedand marked.
Gamma Surveys
1. Establish a general area background, in accordance with HDP-PR-FSS-71 I Final Status Surveys andSampling of Soil and Sediment.
2. Document the 1-minute static gamma count rates on contact with surface soil at each borehole locationprior to sample collection in accordance with HDP-PR-FSS-71 1.
a. Mark the location(s) exhibiting anomalous readings to facilitate possible futureinvestigations (for example, use a flag, stake, or other marking resistani to anticipatedenvironmental conditions).
Soil Sampling
l. collect soil samples in accordance with HDP-PR-FSS-71 I at locations identified in Appendix p-4.
2. Collect a minimum of one duplicate sample for every 20 samples. Two (2) duplicate samples arerequired for BSA 03-01.
3' Collect and homogenize the entire volume from the specified depth interval priorto containerizingthesample. When collecting composite samples, vegetation and native debris/rocks with a diameter griaterthan 1 inch should be discarded.
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4. Submit samples for analysis to TestAmerica following sample chain of custody requirements containedin HDP-PR-QA-006.
Prepared by: Ellen C. Jakub(PrintName)
Peer Reviewed by: Brian A. Miller elzal 6(Print Name)
W. Clark Evers
(Date)
Approved by(RSo): l)( -"(Print Name) (Signature)
(Signature)
t /ar/,r(Dhte)
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Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development
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APPENDIX P-lFINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR
SOIL SURVEY UNIT
Survey Area: BSA 03 Description: Plant Area Open Land Area
Survey Unit: 01 Description: Subsurface Soil beneath Building 231
1. Verify Survey Unit Isolation & ControlSurvey Unit properly isolated and/or controlled (indicated by outlining the area with green rope andposting the appropriate signage) as required by HDP-PR-HP-602, Data Package Development andIsolotion and Control Measures to Support Final Status Survey? Yes[l NoE
(If "No", discontinue survey design until area turnover requirements have been met.)
2, Evaluate Final Remedial Action Support Survey (RASS) Data
a. Number of RASS Samples: 26
b. Record analytical results and summary statistics for each RASS sample.
c. Are all RASS results less, or equal to the appropriate DCGLw from Appendix A of HDP-PR-FSS-701? YesX NoE
d. If 'No", have remaining locations of elevated concentration been evaluated? N/AX Yesf] NoE(If "No", discontinue survey design until investigation is complete.)
e. Have elevated areas identified by gamma walkover surveys been investigated? N/AX Yes! NoE(If "No", then terminate survey design and perform additional investigation and repeat the planning process.)
f. Are the Initial Characterization and RASS data sufficient to support FSS Design? YesX Nof(If 'oNo", terminate survey design, perform additional characteization or remediation and repeat the planningprocess.)
3. Define the Survey Unit ClassificationWrite a short description of the survey unit based on historical use and remedial activities:
The BSA 03-01 survey unit (SU) is classified as MARSSIM Class 2. BSA 03-01 is the subsurface soillocated directly below Building 231. This warehouse was used for covered storage of facility materials andequipment. Some shipping container refurbishment was performed in this area. The footprint of Building
LSA 03-01 , 8t27 fi5
u-234(oCi/e)
u-235(oCi/s)
u-238(oCi/s)
Tc-99(pCi/e)
Th-232(pCi/s)
Ra-226(oCi/e)
Minimum 0.36s 0 (<BKG) 0.110 O (<BKG) O (<BKG) O (<BKG)Maximum 5.1l3 0.280 3.600 2.000 0.300 0.500Mean 2.218 0.1 l5 1.303 0.469 0.042 0.113Median 2.207 0.120 1.200 0.265 0.000 0.005StandardDeviation
1.320 0.072 0.862 0.536 0.081 0.147
# of Samoles 26 26 26 26 26 26
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231 has a surface area of 558 m2. It is classified as a MARSSIM Class 2 survey unit due to the level ofconfidence that areas ofelevated activity are not present.
Classification: 2 Survey Unit Area 1m2;: 558
a. Has the Classification changed from the Initial Classification as indicated in DP Ch. 14 Table 14-16and Figures 14-14 through 14-17? Yesf Non(If "Yes", then include a copy of Appendix P-5, Survey Unit Classification Change Form.)
b. ls the Survey Unit area less than the maximum size for the Classification? Yes[ Nof](If "No", then terminate survey design and evaluate dividing the survey unit into multiple survey units.)
4. Define the Surrogate Evaluation Area (SEA)Select the appropriate SEA as input to calculating scan sensitivity and variability in the RASS SOF.Plant Soils SEA X Tc-99 SEA E BurialPit SEA E
5. Define Final Survey Unit ConditionsX No Excavations, Paved./Partially Paved or Excavated but not Backfilled
I Excavated and to be Backfilled
! Excavated and Backfilled
Note: If a portion of a Survey Unit is paved, then Surface Soil Stratum begins at the bottom of the pavedsurface and extends l5 cm from that point below grade. The lower depth of the Root Stratum remainsat 1.5 m below grade. The pavement is then treated as a separate structural Survey Unit within theSurvey Area.
6. Define the Type of FSS Samples and MeasurementsSelect the appropriate types of samples and measurements for FSS of this Survey Unit thatcorresponds to the final condition and survey classification of the Survey Unit.
Not Excavated. Paved/Partially Paved orExcavated but not Backfilled:
X Surface Soil(<l5cm) Samples.
X Root Stratum Soil Samples composited froml5cm to 1.5m.
Excavated and to be Backfilled:
tr Surface Soil Samples taken from any remainingsurface soil Stratum and Root Stratum Soil Samplestaken at the same locations as Surface Samples,composited over the entire root stratum.
tr Root Stratum Soil Samples composited fromexposed grade to l.5m and Deep Stratum SoilSamples taken at the same locations as RootSamples of the top l5cm of the Deep Stratum.
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X Deep Stratum Soil Samples of the top 15 cm tr Deep Stratum Soil Samples of the top l5 cm of theof the Deep Stratum. exposed Deep Stratum.
Note: If the SOF of the Root Stratum sampleexceeds 0.5, a composite sample iscollect from 1.5 meters to an appropriatedepth (Deep Stratum).
Excavated and Backfi lled
I Core through backfill layer to the lowestpoint where remediation occurred andcomposite a sample from a coring thatextends one meter deeper than the lowestpoint where remediation occurred.
7. Define Derived Concentration Guideline Levels (DCGL)Select the appropriate DCGL for each Radionuclide of Concern (ROC) based on the correspondingSEA and the Uniform Conceptual Site Model (CSM).o If Tc-99 was measured during the characterization/RASS survey, then the o'Measure Tc-99"
DCGLs will be used from Appendix A of HDP-PR-FSS-701.. If Tc-99 was not measured in the characterization/RASS survey, then the modified U-235 DCGL
("Infer Tc-99") will be used from Appendix A HDP-PR-FSS-701.
8. Determine the Number of Samples in the Statistical Survey Population
Note: The statistical survey population is routinely derived based on the Uniform DCGL.o Altematively, if the Survey Unit excavation extends into multiple CSMs (e.g. surface, root &
deep), then the DCGL(s) from the most limiting strata can be used with the equations below; OR. If the excavation significantly extends into the Deep Stratum, then the alternate approach
presented in Step 8.2.5 of HDP-PR-FSS-701 may be used for determining the mean SOF andweighted standard deviation that accounts for the reduced dose from the deeper surface, i.e., by
LSA 03-01, 8t27lt5
Surface Stratum(pCi/g)
R.oot Stratum(pCi/s)
Deep StratumhCils.\
Uniform(oCiis)
u-234 195.4u-235 51.6u-238 168.8Tc-99 25.1
Th-232 + C 2.0Ra-226 + C 1.9
l. The Deep Stratum DCGLs correspond to the Excavation Scenario DCGL from Appendix A of HDP-PR-FSS-701.
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weighting the Root Stratum and Excavation DCGLw values.
o The values used in determining the following (SOF,,*. and os6p) can be found in the tables fromSection 2b and Section 7.
a. Determine a mean SOF for the characterization/RASS survey data set using the equation from Step8.2.5a of HDP-PR-FSS-70 I .
Lower Bound of the Grey Region (LBGR) : SOFy"r, :0)2b. Determine the weighted standard deviation in the SOF for the characterization/RASS survey data set
using the equation from Step 8.2.5b of HDP-PR-FSS-701.
Note: For the determination of SOFlu"* and ossp , include the concentration for Tc-99 if it was measured.If Tc-99 was not measured, include the modifiedU-235 DCGL and omit Tc-99 concentration term.
/ Larger of the two used in worksheet survey design
Survey Unit osor: 0.09 trBackground osop: 0.14 X
c. Define the Decision Errors.
Type I Error:0.05 Type II Error:0.10Note: The Type II Error is set at 0.10 initially but it may be adjusted with RSO concurrence.
d. Determine the Relative Shift using the equation in Step 8.2.5d of HDP-PR-FSS-701.
Relative Shift: 6.23* * Spreadsheet value may differ from hand-calculated results due torounding.
e. Is the Relative Shift between 1 and 3?
o If "Yes", then continue to Step 8f.
Yesfl NoX
o If "No", then adjust the LBGR as necessary to achieve a relative shift between I and 3. In order toaccomplish this, the LBGR may be set as low as the MDC for the analytical technique.
Adjusted LBGR:0.58Adjusted Relative Shift: 3.0
f. Determine the Number of Samples (N/2) required corresponding to the Type I error, Type II Error andthe Relative Shift from Appendix F or calculate using equation 5-l from MARSSIM.
No. of Samples (N/2):8
9. Determine the Scan MDC for Total Uraniumo When U-235 is reported as negative or zero and U-238 is reported as positive, set the sample
enrichment to 0.72o/o (natural uranium).
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o When U-235 is reported as positive and U-238 is reported as negative or zero, set the sampleenrichment to 100% (highly enriched).
o When both U-235 and U-238 data arc reported as positive, determine the U-2381U-235 ratio for eachsample and use Appendix G of HDP-PR-FSS-701, to determine the uranium enrichment thatcorresponds to the mean U-238:U-235 ratio.
a. Record the average Uranium enrichment for the survey unit using the enrichment determined for eachindividual sample.
Average Enrichment (Yo): 1.6
Note: The Activity Fractions (,f ) for each radionuclide corresponding to the mean enrichment used in the
following calculations is obtained from Appendix G of HDP-PR-FSS-701.
Note: If the Uniform DCGL is not used, and the excavation extends into multiple CSMs (e.g. surface, root &deep), then the most conservative DCGLs should be used in the following calculation.
b. Determine a DCGLw for Total Uranium using the equation from Step 8.2.6b of HDP-PR-FSS-701.
DCGLwrotu for Total Uranium : NA pCilgc. Identify the Radiological Instrument that will be used for scanning.
Note: Since there are no pipe removal trenches in Building 231, a gamma walkover survey (GWS) will be not beperformed.
X 2"x2" NaI Detector tr FIDLERNaI Detector tr other
d. Determine the Scan MDC for the selected instrument using the equation in Step 8.2.6d of HDP-PR-FSS-701 or the calculations presented in the Open Land Area Gamma Scan MDCs section in Chapter14 of the DP.
MDC."un for Total Uranium: NA pCilg
10. Determine the Scan MDC for Th-232 and Ra-226a. Select the appropriate DCGLw for Th-232 and Ra-226 corresponding to the soil strata that will be
exposed at the time of FSS and the SEA where the survey unit is located.
Th-232 DCGL1ry: 2.0 pCi/g Ra-226 DCGLw: 1.9 pCilg
Note: If the Uniform DCGL is not used, and the excavation extends into multiple CSMs (e.9. surface, root &deep), then the most conservative DCGL for the strata should be used. With RSO concurrence, thealtemate approach as presented in DP Ch. 14, Section 14.4.3.1.10 may be used in lieu of using themost conservative.
b. Determine the Scan MDC for the selected instrument
Note: HDP-TBD-FSS-002 documents the calculated MDC,"* of 0.87 pCilg for Th-232 and 1.21 pCi/g forRa-226 when using a2"x2" Nal detector with a background of 10,000 cpm. If a different backgroundis indicated, see Appendix C of HDP-TBD-FS5-002 for the appropriate MDC,"*,.
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Note: If the selected instrument is not a 2"x 2" Nal detector, then the MDCr"un can be determined inaccordance with the Open Land Area Gamma Scan MDCs section in DP Ch.14.
MDC,"un forTh-232 : NA pCilg MDCr"un for Ra-226 =NA pCilg
Note: If a value is not applicable, mark as N/A.
1I. Adjust the Statistical Sample Population Size (N/2) for Scan MDCa. [s the Scan MDC for the selected instrument less than the DCGLyy that was determined for Total
Uranium? (compare values from Step 9b and 9d) NAX Yesf] NoI
Class 2 and 3 survey units - If "Yes", then proceed to Step 12, if "No", then contact the R$O fordirection as to changing parameters for scanning such as scanning speed, detector distance, differentinstrumentation, etc.
Class 1 survey units, proceed to the next step.
b. Divide the total area of the survey unit by the Number of Samples (N/2) determined in Step 8f todetermine the area bounded by the statistical sample population.
Area Bounded by the Statistical Sample Population (Asu) = NA m'
URANIUMc. Was the Scan MDC for the selected instrument less than the DCGLw that was determined for Total
Uranium in Step 11.a? NAX Yesfl NoE(lf o'Yes", then proceed to Step 12, if "No", then proceed to the next step).
d. Using the Area Factors in Appendix H of HDP-PR-FSS-701 and using the equation from Step 8.2.8dof HDP-PR-FSS-701, determine a Total Uranium AF for each listed area using the Activity Fractions(fl for each radionuclide that corresponds to the mean enrichment from Appendix G of HDP-PR-FSS-701.
Note: The AFs for the Uniform Stratum will generally be used. The RSO may approve use of AFs from theSurface, Root or Deep CSMs, or the Excavation Scenario.
e. Find the Area Factor (AF1s61g) determined in the previous step that corresponds to the area bounded bythe statistical sample population (Asu).
AFrotu for the Bounded Area (Asg) : NA
f. Multiply the DCGLw determined for Total Uranium by the Area Factor (AF1o1g) to derive a DCGLn1,rcfor Total Uranium.
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APPENDIX P.lFINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR
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g. Is the MDCr"un for the selected instrument less than the DCGLsrrac that was determined for TotalUranium? NAX YesE NoE(If "Yes", then proceed to Step I lk, if "No", then proceed to the next step.)
h. Determine a new AF (AFsr,ac) corresponding to the MDC..". for the selected instrument by dividing theMDC."un by the DCGLw.
AFeNac for U1o61 : NA
i. Find the Area (A') that corresponds to the-Area Factor (AFsr,ac).
A' for U66 : NA
j. Determine an Adjusted Number of Samples (Nsr',ac) for the statistical sample population size thatcorresponds to the bounded AsMs using the equation from Step 8.2.7j of HDP-PR-FSS-701.
Nsuc corresponding to A' for U16161 : NA
TECHNETIUM (Tc-99)k. Determine if the maximum reasonable result for Tc-99 from previous Characterization or RASS
remaining within the area is greater than the DCGLry for the appropriate CSM and SEA?
N/AE Yesfl NoX(lf "No", then proceed to Step 12, if "Yes", then proceed to the next step.)
l. Determine the area per sample station needed to account for potential Tc-99 hotspots by dividing thehighest Tc-99 result obtained by the Tc-99 DCGLy for the appropriate CSM and compare that value tothe Area Factor Tables in Appendix H.
A' for potential Tc-99 hotspots: NA
m. Determine the number of samples needed by dividing the Asu by the A' for potential Tc-99 hotspotsdetermined in Step 1ll.
N corresponding to A' for potential Tc-99 hotspots : NA
12. Determine the Grid Spacing
a. Larger of N/2 from Step 8f, the maximum value of Nelac from Step I lj, or N corresponding to A' forpotential Tc-99 hotspots from Step I lm.N/2, Ner\ac[max], or N corresponding to the potential Tc-99 hotspot = 8
b. Is the Survey Unit a Class 3 Survey Unit? Yesf] NoX(If "Yes", then continue to Step 13, if "No", then proceed to the next step).
c. Determine Grid Spacing (L) using the equation from Step 8.2.9 of HDP-PR-FSS-701.
Grid Spacing (L) for Survey Unit: 8.9 m
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APPENDIX P.lFINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR
SOIL SURVEY UNIT
13. Generate a Survey Mapa. Assign a unique identification number to each sample in the statistical sample population using the
guidance and direction provided in Appendix M of HDP-PR-FSS-701.
b. Generate a graphic representation of the Survey Unit with dimensions and boundaries
corresponding to the established reference coordinate system in accordance with Step 8.2.10 ofHDP-PR-FSS-70I.
c. Using the reference coordinate system, ascertain coordinates for each sample location.
d. Designate sample locations, and location coordinates on Appendix P-4, FSS Sample & MeasurementLocotions & Coordinates and attach a copy of that form to the FSSP.
e. Attach a copy of the developed Survey Map with sample locations to the FSSP.
14. QC, Biased & Discretionary Samplesa. Randomly choose 5Yo of the statistical sample population as QC samples in accordance with
HDP-PR-FSS-703, Final Status Survey Quality Control.
b. Designate QC sample locations, and location coordinates on attached Appendix P-4, FSS Sample& Measurement Locotions & Coordinates.
c. Designate if any biased samples will be taken at the discretion of the HP Staff designing thesurvey and the basis for taking them. Necessary biased samples will be explained on AppendixP-3, F,S^S Sampling Plan.
d. Using the reference coordinate system, determine coordinates for each biased sample location.
e. Designate biased sample locations, and location coordinates on attached Appendix P-4, FSS Sample &Measurement Locations & Coordinates.
f. Include discretionary sidewall samples as applicable using guidance in Step 8.2.11. Are discretionarysidewall samples required?
(If o'No", then proceed to Step 15, if "Yes", then proceed to the next step.)
N/AE Yesf NoX
g. Determine the number of samples to be collected based on the sidewall surface area compared to thetwo dimensional systematic surface area.
Number of discretionary sidewall samples : NA (maximum); may be reduced with FSS Supervisorapproval if the actual sidewall surface area is significantly less than the CAD-calculated theoreticalmaximum.
h. Any discretionary sidewall samples will be taken at randomly chosen location(s) of the sidewall(s) (i.e.,not based on radiological scans) selected atthe discretion of the Health Physics Technician performingsoil sampling. Necessary sidewall samples will be explained on Appendix P-3, FSS Sampling Plan.
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FINAL STATUS
15. Scan Coveragea. The Survey Unit is:
APPENDIX P-lSURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR
SOIL SURVEY UNIT
I Class I X Class 2 I Class 3
b. Based on the Survey Unit Classification, the scan coverage in this Survey Unit is;
tr 100% Scan Coverage of exposed soil X NaZ Scan Coverage of exposed soil
Note: Since there are no pipe removal trenchesBuilding 231, a gamma walkover survey (GWS) will
c. Designate any specific scan locations, as
Plan.
16. Investigation Levelsa. The Survey Unit is: f] Class 3
not be performed.determined necessary, on Appendix P-3, FSS Sampling
l) Scan Investigation Levels are set at: NA cpm
2) Sample Investigation Levels are set at 50o/o of the DCGLry when expressed as the SOF.
b. The Survey Unit is: I Class 2
Note: Since there are no pipe removal trenches in Building 231, a gamma walkoversurvey (GWS) will be not be performed.
l) Scan Investigation Levels are set at: NA cpm
2) Sample Investigation Levels are set at the DCGLw when expressed as the SOF.
The Survey Unit is: f] Class t
1) Scan Investigation Levels are set at: NA cpm
2) Sample Investigation Levels are set at the DCGLry when expressed as the SOF.
17. Attachments
Attach a copy of completed forms as appropriate:
I Appendix P-3, FSS Survey Sampling Plan,
I Appendix P-4, FSS Sample & Measurement Locations & Coordinates
ffi appendix P-5, FSS Unit Classification Change Form! Appendix P-6, FSS Field LogI Survey Unit Figure
fl other:
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18. FSSP Development Checklist Approval
Prepared by:
Peer Reviewed by:
Approved by (RSO):
Ellen C. Jakub(Print Name)
Brian A. Miller@rintName)
W. Clark Evers(Print Name)
{h?//s(Date)
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Procedure : HDP-PR-FSS-70 1, Status Survey Plan Development
Page 1 of1
APPENDIX P.5FSS SURVEY UNIT CLASSIFICATION CHANGE FORM
SurveyArea:
Survey Unit:
No. BSA 03 Description: Plant Soil Area, Open Land Area
No. 0l Description: Subsurface Soil beneath Building 231
Initial Classification per DP Ch. 14:
Class 1 f] Class 2 l) Class 3 X Non-Impacted trNew Classification:
Class I E Class 2 X Class 3 E Date of Change: 05-08 -2015
Describe the proposed change and the reason for the change:
BSA 03-01 was initially classified as MARSSIM Class 3 in most of the Decommissioning Plandrawings and tables, however one figure indicated a Class 2 designation. Therefore the moreconservative designation of Class 2 will be implemented.
Prepared by: Ellen C. Jakub(Print Name)
Approved by (RSO): W. Clark Evers /)furleilr(Date)
Quality Record
(Print Name) (Signature)
BSA 03-01 ,81281t5
Procedure: HDP-PR-FSS-701, Final Status Survey plan Devel
Westinghouse Non-Proprietary Class 3 Appendix P-4, Page I of 1
BSA 03 Description: Plant Open Land Area0l Description: Subsurface Soil Below Blde 23 I
FSS Classification: Class 2
Sanrples highlighted in red rvill be
colleclcd and archir,cd: radiologicalanaly scs pertirrnred onlv il' overll ing
rotx sanrple has a SOI-' >0.5.
*Elevations are in feet above mean sea level.** Missouri - East State Plane Coordinates fNorth American Datum (NAD) 1983] (Open Land Area) OR
stance in feet fiom lower left corner of the surface (Structures); each surface has it's own (X,Y) = (0,0) ORpiping the distance from the beginning of the survey unit
[:.rcar.'ati0nB03-0 l -03-P-L:-S-00 txcavation 6-inch803-01-04-P-s-s-00B03-0 I -05-P-R-S-00
B03-0 l -06-P-l:-S-00 Ilxcar ation [;rcar alion b-inch crab803-01-07-P-S-S-00803 -0 I -08-P-R-S-00 Root 4.4-ft com803-0 l -09-P-1,-S-00 Ercavation Excavation 6-inch
803-01-l l-P-R-s-00t]03-01-12-P-l:-S-00 l:rcai alion lrrcavalion (r-inchB03-0 I - I 3-P-S-S-00
803-01-14-P-R-S-00I]01-01 - I 5-l'}-l:.-S-0t) [:rcar ation Ir.xcavation 6-inch
B03-01- l 7-P-R-S-00l]03-0 I - I 8-t,-t1-s-rx) Irrcal at ion I:xcavation 6-inch urabB03-0 r - I 9-P-S-S-00B03-01-20-P-R-S-00r]03-0r-2I-P-r.-s-00 [:rcavalion []xcavation 6-inch !rrahB03-01-22-P-S-S-00B03-01-23-P-R-S-00B0-r-0 I -24-P-F.-S-00 Ercavation 6-inch803-01-02-P-R
