ML052010662

Calculation E900-03-031, Rev 0, Shonka Survey of Debris & Soil Piles.

ML052010662
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	06/10/2004
From:	Donnachie P, Holmes R GPU Nuclear Corp
To:	Office of Nuclear Reactor Regulation
References
E900-03-031, Rev 0
Download: ML052010662 (18)

Text

SNEC CALCULATiON COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-03-031 0 /7/vi 1 of 7 Subject Shonka Survey of Debris & Soil Piles Question 1 - Is this calculation defined as 'In QA Scope'? Refer to definition 3.5. Yes 0Z No E Question 2 - Is this calculation defined as a 'Design Calculation'? Refer to definitions 3.2 and 3.3. Yes 0 No n Question 3 - Does the calculation have the potential to affect an SSC as described in the USAR? Yes [l 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 immediate supervisor should not review the calculation as the Technical Reviewer. If a 'YES' answer is obtained for Question 3, SNEC Management approval is required to implement the calulation. Calculations that do not have the potential to affect SSC's may be implemented by the TR.

DESCRIPTION OF REVISION APPROVAL SIGNATURES A Calculation Originator P. Donnachiel :jDate C /;/o Technical Reviewer R. Holmes/ Date /

Additional Review Date Additional Review Date SNEC Management Approval Q ,i _ Date l

a _fSNEC CA ULATION SHEET -

Calculation Number Revision Number Page Number E900-03-031 0 Page 2 of 7 Subject Shonka Survey of Debris & Soil Piles Design 1.0 PURPOSE 1.1 The purpose of this calculation is to provide the survey design guidance to be followed for conducting final status surveys (FSS) for accumulated backfill materials. Backfill materials consist of approximately 11,200 tons of building debris from the Saxton Steam Generating Station (SSGS) Footprint, garage and warehouse and 5,000 tons of soil from the SNEC CV Yard. The building debris had been crushed to less than 4 inches in diameter. These materials will be processed, batched and monitored for use as fill for excavations that will remain following site decommissioning. This material is classified as Class 1.

1.2 Shonka Research Associates, Inc (SRA) has been contracted to build, operate, and summarize data from a radiation monitoring system called the Subsurface Multi-spectral Contamination Monitor (SMCM). This system was developed with funding from the NRC (NRC-04-92-096. "Continued Development of a High Sensitivity Landfill Monitor. The Results of a Phase II SBIR Grant", December 1994). The SMCM combines into one instrument the capabilities of both scanning surveys with in-situ gamma spectrometry. The SMCM is a scanning spectrometer; 1.3 The scanned debris and soil will be separated into approximately 250-ton piles called batches. Although there were a number of different types of materials present among the piles, each individual pile is a homogeneous mixture of the same type of material. Each batch will be summarized in a Survey Request (SR) Report.

1.4 Shonka Research Associates (SRA) will conduct scan surveys using procedures reviewed and approved by SNEC.

2.0

SUMMARY

OF RESULTS 2.1 The following information will be used to conduct the applicable FSS for this survey design:

2.1.1 All Class 1 materials will be 100% scanned with the SMCM.

2.1.2 Scan speed will be set in accordance with SRA procedures.

2.1.3 Per Tables 1 and 2 the more conservative effective Cs-1 37 DCGLW for this design is determined to be 4.2 pCi/g. This administrative DCGLW is 75% of the calculated value (5.6 pCilg) from Table 2 for the median radionuclide mix in debris. Two sets of analytical data were reviewed to determine radionuclide mix percentages, i.e. CV soil and debris/sediment from the SSGS footprint The mix fractions are as follows:

Soil - Cs-137 (62.5%), H-3 (35.7%), Co-60 (<1%), Sr-90 (<1%), Pu-2381239

(<1%) &Am-241 (< 1%)

Debris - Cs-137 (28.6%), Ni-63 (69.4%), Co-60 (<1%), Sr-90 (<1%), Pu-2381239

(<1 %) & Am-241 (<1 %)

The debris material data provided the more conservative mix percentages and therefore was used in this design to calculate the above DCGLW.

2.1.4 The SMCM wil be used LAW SRA procedures listed in Reference 3.6 sectjon. 100%/o surface scan is required of the material within 13" of the surface. This survey will be

SNEC CALCULATION SHEET -

Calculation Number Revision Number Page Number E900-03-031 0 Page 3 of 7 Subject Shonka Survey of Debris & Soil Piles Design performed by Shonka Research Associates using a series of four 5" by 2" Sodium Iodide Detectors.

2.1.5 Following an alarm from the SMCM, a scan survey shall be performed using a Ludlum 2350 (or equivalent) meter with a 2' by 2" Nal detector on the suspect material. Any material indicating activity greater than or equal to 2000 NCPM will be removed and contained.

2.1.6 Material Sampling - Obtain approximately 500 cc of material from each truckload. A composite will be obtained for each batch of samples. A 1.5-liter sample will be obtained of this composited material.

3.0 REFERENCES

3.1 SNEC Facility License Termination Plan.

3.2 Procedure E900-IMP-4500.59, 'Final Site Survey Planning and DQA".

3.3 SNEC procedure E900-IMP-4520.04, 'Survey Methodology to Support SNEC License Termination".

3.4 SNEC procedure E900-IMP-4520.06, 'Survey Unit Inspection in Support of FSS Design".

3.5 NUREG-1575, "Muldi-Agency Radiation Survey and Site Investigation Manual", August 2000.

3.6 SRA Procedures.

3.6.1 SMCM Procedure 002, Rev 3, "Fixed In Situ Data Collection in Support of a SMCM Survey."

3.6.2 SMCM Procedure 004, Rev 1, "Source Response Checks and Performance Based Checks of any Nal Detector Configuration Installed on the SMCM."

3.6.3 SMCM Procedure 005, Rev 1, 'Calibration and Confirmation of a SMCM Incremental Encoder."

3.6.4 SMCM Procedure 006, Rev 0, 'Requirements for Completion of a Survey Using the SMCM."

3.6.5 SMCM Procedure 007, Rev 0, "Calibration of Nal Detector."

4.0 ASSUMPTIONS AND BASIC DATA 4.1 SRA procedures will be used to perform scan surveys.

4.2 Remediation History The building debris has been crushed to less than 4 inches in diameter. This material consists of garage and warehouse demolition debris comprised mostby of brick and mortar.

The debris from the Saxton Steam Generating Station (SSGS) footprint, which was excavated to allow survey of below grade structure(s) is comprised mostly of brick and concrete with minor amounts of tile and grout.

em-SNEC-CALCULTON SHEET Calculation Number Revision Number Page Number E900-03-031 0 Page 4 of 7 Subject Shonka Survey of Debris & Soil Piles Design The soil that was surveyed as part of this design was taken from three site areas. First was the East Soil Pile, which consisted of consolidated soil and sample debris material. This pile was comprised of soil/concrete/rocks from various excavations throughout the decommissioning project including remnants of the Control and Auxiliary Building unearthed during the Decommissioning Support Facility (DSF) excavation, the interceptor trench and the CV yard excavation. Secondly, soil was excavated from areas around the CV and other impacted surface soils from the site. The third component of the soil consisted of sediment pumped from the SSGS intake and discharge tunnels.

4.3 Special measurements including gamma-ray spectroscopy are required in this survey design.

4.4 The survey design checklist is listed in Attachment 1.

5.0 CALCULATIONS

• The required DCGLw = 5.6 X 0.75 = 4.2 pCi/g.

6.0 APPENDICES 6.1 Attachment 1, Survey Design Checklist.

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..-- SNEC C.AL`CULATION SHEET-.

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.SNEC CALCULATION SHEET - .

Calculation NuSuber RevoDron Number Page Number E90003-031 0 Page 6 of 7 Subject Shonka Sulrvey of Debris & Soil Piles Design Table 2 Effedifw DCGL C~akxdor fb Cs-137 (in pCUg) am9. fpmg 114M ICVg -

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SNEC LCULATION SHEET Calculation Number Revision Number Page Number E900-03-031 0 Page 7of7 Subject Shonka Survey of Debris & Soil Piles Design Exhibit I Survey Desiqn Checklist Calculation No. lLocation Code

_6900-03-014 See attached design for location codes Status Reviewer REVIEW FOCUS (Circle One) Inhtials & Date I Has a survey design calculation number been assigned and is a survey design summary N/A NIAjI descnption provided? S tl 2 Are drawingstdiagramns adequate for the subject area (drawings should have compass 2r r w n sda r m d q a efrheadings?Ye ,0 I 3 Are boundaries properly identified and is the survey area classification clearly indicated? Yes, C e io/a i, Has the survey area(s) been properly divided into survey units IAW EXHIBIT 10 Yes, X "1')

/5/

Are physical characteristics of the area/location or system documented? Yes, (N W 11010DY 6 Is a remediation effectiveness discussion included? YesA 7 Have characterization survey and/or sampling results been converted to units that are

___comparable to applicable DCGL values? 7sNA Is survey and/or sampling data that was used for determining survey unit variance included? Yes, (i 9 Is a description of the background reference areas (or materials) and their survey and/or Yes/A 1- /

sampling results included along with a justification for their selection? e s,

10 Are applicable survey and/or sampling data that was used to determine variability included? YJj1s & / s 11 Will the condition of the survey area have an impact on the survey design, and has the ) N/A

______ probable impact been considered in the design? a_____

Has any special area characteristic including any additional residual radioactivity (not 12 previously noted during characterization) been identified along with is impact on survey N/A

____design? - S 13 Are an necessary supporting calculations and/or site procedures referenced or included? (i N/A 14 Has an effective DCGLw been identified for the survey uni(s)? F iNA 15 Was the appropriate DCGL4w included in the survey design calculation? es;)N/A 19 ZZ/o 16 Has the statistical tests that will be used to evaluate the data been identified? Yes, N/A 17 18 Has an elevated measurement comparison been performed (Class 1 Area)?

Has the decision error levels been identified and are the necessary justifications provided?

jA) Yes, 19 Has scan instrumentation been identified along with the assigned scanning methodology? e N/A 20 Has the scan rate been identified, and is the MDCscan adequate for the survey design? e) WA 50 1D 21 Are special measurements e.g., in-situ gamma-ray spectroscopy required under this design, m N/A and is the survey methodology, and evaluation methods described? __________

22 Is survey instrumentation calibration data included and are detection sensitivities adequate? N __A______

23 Have the assigned sample and/or measurement locations been clearly identified on a diagram Y eA /

or CAD drawing of the survey area(s) along with their coordinates? es, 24 Are investigation levels and administrative limits adequate, and are any associated actions ( N/A clearly indicated? G ._______

25 For sample analysis, have the required MDA values been determined.? l( WA 26 Has any special sampling methodology been identfied other than provided in Reference 6.3? l NOTE: a Copy of this completed form or equivalent, shall be Included within the survey design calculation.

DCGL Calculation Logic-CV Yard Soil & Boulders (Decay Update)

Survey Unit: SNEC Containment Vessel (CV) Yard Soil and Boulders

11.

Description:

The purpose of this calculation is to determine a representative isotopic mix for the CV Yard Soil and associated Boulders from available sample analyses. The effective surface and volumetric DCGLws are then determined from the mean percent of applicable samples.

Ill. Data Selection Logic Tables: The radionuclide selection logic and subsequent DCGL calculations are provided in seven (7) tables. These tables were developed using Microsoft Excel. Table explanation is as follows.

Table 1: Reduced Listinq - This table, which has been extracted from a larger database, provides a list of the most representative sample analyses. Results are from scoping, characterization, and pre/post remediation surveys. The samples consist of soil and soil-like media that was taken in support of the aforementioned surveys. As applicable, a sample number, sample location/description, radionuclide concentration, analysis date are provided for each sample. Positive nuclide concentrations are noted with yellow/shaded background fields while MDA values are noted in the gray shaded fields.

Values in red typeface are on-site analysis results.

Table 2: Reduced Listinq - Decayed - This table decays the data from Table 1. Half-life values (days) are listed above each respective nuclide column. Samples are decayed from the respective analysis date to December 15, 2004. Positive results are denoted in a yellow background field while MDA values are noted in the gray shaded fields. Values in red typeface are on-site analysis results.

Table 3: Reduced Listinq Decayed - MDAs Removed - This table provides the best overall representation of the data. Non-positive nuclide columns have been removed as well as all the MDA values. Therefore, 11 nuclides have been reduced to four (4).

Table 4: Mean Percent of Total for Positive Nuclides - This table provides the calculation methodology for determining the relative fractions of the total activity contributed by each radionuclide. From this information the mean, sigma, and mean % of total are calculated.

From this information the mean, sigma, and mean % of total are calculated. The mean %

of total values is used to calculate the surface gross activity DCGLW per MARSSIM equation 4-4. See Table 6. Note that the mean percent values were averaged using only the positive sample results in each column. In some cases only a single nuclide value (e.g. Sr-90) had a positive result. This value is listed as the value in the mean result field, and results in higher "mean percent of total" values for single positive radionuclides in the mix, which is a conservative.

Table 5: Ratio to Cs-1 37 for Positive Nuclides - This table provides the calculation methodology for determining the surrogate ratio to Cs-137 for each radionuclide. From this information the mean, sigma, and mean % of total are calculated. The mean % of total values is used to calculate the volumetric DCGLW per MARSSIM equation 1-14. See Table 7. Note that the mean percent values were averaged using only the positive sample results in each column. In some cases only a single nuclide value (e.g. Sr-90) had a positive result. This value is listed as the value in the mean result field. This results in higher "mean percent of total" values in the mix, which are conservative.

Note: From Tables 4 and 5, only the "mean % of total" values are used as input to the "Effective DCGL Calculation Spreadsheet" as illustrated in Tables 6 and 7.

Table 6: Effective DCGL Calculator for Cs-1 37 (in dpm/1 00 cm2) - This table provides the surface gross activity DCGLW calculation results from data derived from Table 4.

I

Table 7: Effective DCGL Calculator for Cs-1 37 (in pCi/g) - This table provides the surrogate volumetric modified Cs-137 DCGLW calculation results from data derived from Table 5.

IV. Summary - Since the CV Yard and Boulders are volumes of soil or rock material, existing in place or in a pile, the release limit is primarily based on the volumetric DCGLW. Using the above data selection logic tables the calculated Cs-137 volumetric DCGLW is 5.75 pCi/g (previous value was 5.73 pCifg due to earlier decay date of January 15, 2004). The updated value will be reduced by 25% as part of SNEC's requirement to apply an administrative limit as discussed in the License Termination Plan (LTP).

Using the above data selection logic tables the calculated gross activity DCGLwfor surface area is 44,306-dpm/100 cm2 (previous value of 44,434-dpm/100 cm2 due to earlier decay date of January 15, 2004). The updated value will be reduced by 25% as part of SNEC's requirement to apply an administrative limit as discussed in the License Termination Plan (LTP).

2

i TABLE I - REDUCED LIST1INGl Decy Dol H-3 9F- c7 -o Co-137 A241 P238 P-238 tl241 C-14 C63 Es162 An~m14,200 HCY TunpeN LAD No. CV Ti fiechtOn t 0.59 Noveme 17,1999 2 SX9SL9929 111074 SubsufceS-va;4 19(0-T), AY-1 2B,0Ll04D7i SXSLiff3 Teleclne 8 L1tU-19181 NotCV YlldSa B8K127, 81Z E9,Sglpb#,OL2 4M 8 Om F 0 8i- 98 I&M 0AW MW H>

tl tO Gu Ml 27, 2002 3.03 0l1.29 in j me 29, 2002 4 SXSL1039 Tebled--$19S Ll1lU2 Nrth CYYrd SolAY-127,81 07E, Svq* b#3, Lt 4.8 F18 i i 200 le29, SXSL11 1 S Tekedynea-020;1.1143 North CYYard Sol AY-1Z90,804' El, Sn; #2, OL1 N 7l9e,Sam#&#

ortClr~AY-129, L 3.44 Diit 3 4.77 OCL :iDAm:I62irlWlS 29,2002 SXSL1122 Tdelalrw-N1,1;1M364 2 9F 3 235 _ S w 4 July 3.2002 SXSL1132 Teledpw n:2 1-111" Nrh CV Yard So# AZ 803 BSwo S.# 0L1 X II h OL1 2 0.6 n ti n+w Fcbruary 13, 2002 SXSL12SI4 Tdl-732211;LiN77-2 Ar~sVbl,A-2, Sto 10 D9 11 W N 056 M~arch5t2OD2 13 SXSL2-371 Teletpw-7190; 1-71n3841 CV 1 -ea-E1 Yard Okirl Rc Hck, I112Yby Lip,OL1I Tr bmTIS7Us; L1n838-11 CV Area - EastYard DlrlPte - Stxnatom(efoop ceirbr), OL1I ;S 0.1 Mrch 6, 2002 14 SXSL-2372 i_SXSL3140 OWVT,11V3-10-91 CV Yarrd,SoNPie C Emttf eBmonst Side (Deph), OL1 >lgl0F5i 0.825 ff~ 5ELO2Auguttl 30, 2002

• rw 0.6 Sad 20 16 iXL12 TernedyL2832rtF3 sod PlkbCYYard, Three Fastton3EastSre,SR-37, OL1IS 17 rSXS14S DOIXT,1638-9034-181 Eat CY Yrd, Prite T onEat gSide ('eqo~phjOL I~ ¢g: 1.2e, 01:Oie a t9 kt02 18 SXL14 eredyws L28326-4 Sidet,SR-7, (Li Sdi Pile,CV Yard, Six Fedt on Eastet s2 M 0.3 Argust13, 2002 0.3 AWl:i 30, i~g2 0il5Autsi 2002 18 l XL3S EWT,IM043-1841 EasetCYYard, SolPtle Top (S Lbpth), OLI1 21 IN I 05 am HE October 2, 2003 ISXSL4143 Tre;eyw L22187-3 CV Yrrd Sod- West Side, ArPI-7, 0Ll i 22 Z24 M 0 .ff7 3.9 VnU 17 0.043 r510,zM ocltobr 2, 2003 23 I SXSL4149 Telerlym; L22187-4 CV Ytird Sol - West Slce,AP1.7, OL1 j j ~TABLE 2 -REDUCED LISTiNG - DECAYEDl 2e Dy Date 4 iDectb 1,200r 0l i2 hnv Daute ET ltO I Februar314,2002 1400 Novebet~r 17,1999 l 95ss 2

AJuhe27,2002 902 3

Au 3Fe26,2002 901 4

1 Jurm 2e 9, 2002 900 18 e 29,2002 J00 3, 2002 MlJuy B96i 16 A 3, 2002 898 J~26.2W0 Myfi 1238 Mcoy 26, 2001 1238 i7 Ftebruttry 13,2002 101L36 I:

arobrch 2002 1015 IS I MLrchG22002 1015 11 11 i Auguel30,2002 838 13 lAugust 13,2002 i '55 13 i32i Agzt30,200l 838 Augud 13, 2002 l t55 216 l Aaust0,202 l 838 1

22 1 I i October 2, 2003 440 23 I I I October 2, 2003 440 KEY

[~ Z~ hI] Yelow Background= Pos..'e Resuk Gray ShadedBackyr-~d! = MDA XXX RedValues= O,, Ste Analyosi 3

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TABLE 3- REDUCED LISMING DECAYED - MDA's REMOVED SNECSarple No LAB No. Locatmonlesocrltllon H-3 Sr-" Co-U Cs-137 TodepCih CV Turnd EWXT, 0102069-S1 CV Tuel Seent Copodsle, OLI 8.81E+00 7.61E-01 1.14EE+03 1154.23 SX9SL99219 111074 Subsufce Sampe t29(0-5), AY.l21,0L1 2__ 5.25E-01 0.53 SXSL1 063 Teledyn1e-11,1; 1191841 North CV Yard Soil BA-127, 812' E, Samoa #5, OL2 3.98E-0 8.37E-01 4.82 SXSL1089 Tetedyne-OMU1I; 1111M42 North CV Yard SoilAY-127, 81 ' B, Sampe 5 3, OL1 2.64E+00 1.22E+00 3.86 SXSL111S Tetedyne t-U29; 1191113 North CV Yard Sol AY-128, 804 B, Smiole 5 2, OL1 4.25E+00 1.70E44J0 5.95 SXSL1122 Telaemne-1U21; L.1S14-4 Norh CV YardSol AY-129,7S8 E, Se t 2, OL1 2.99E+00 4.S1E-+10 750 SXSL1130 Telimyne-8122; L1911946 North CV Yard Soil AX-129,803 8, Sample t4, OLI 4.34E+00 2.16E-02 2.14E401 2S673 SXSL 1132 Teedyqe-11123;e11114-6 North CV Yard Sol AZ-130, Sample 5, COL1 2.59E+0O 2.45E+00 5.04 SXSL1270 WXT,n1uss *2 AX-129, 3-3, So, CV SESide 6'From CV,80 B., OLI 2,14E+01 21.37 SXSL1281 BWXT, 91B65 n- AX-1 28,3-1, So, CV Tunnel East 5' From CV,8W B. OLI 4.05E+00 4.05 SXSL2649 Telteyne-7322; 118177-2 W ail, A-2. 5to 10'ODth, OL1 Anukis 562E.01 0.56 SXSL2871 Teledme-711949; LI738-11 CV Area - East Yard DHiPle - Wdde, 12Y Way Up, OL1 525E-1 0.53 Teedyre-7190; eSXSL2S72 L1113t19- CV Area - Eat Yard Dirt Plie- Botom (ehotop carter), CLO 93E-02 o.09 SXSL3140 BtXT,138-03-1t-41 East CV Yard, Sol Pie @8' on West Side (6 Depth), OL1 7.83E-01 0.78 SXSL3142 Tekxdve; L20326-3 Sol Pie, CV Yard, Three Feet on EastSide, SR-37, OL __ 569E-01 0.57 SXSL3145 E XT,1S3B-tlS3-191 East CV Yard, Sol Pie p3' on EastSide (68 Deph), OLI 1.20E+00 1.20 SXSL3149 Tebene; L20326-4 Soil Pie, CV Yard, Six Feet on East Side, SR-37, COL 2M4E-01 0.28 SXSL3153 11XT,1S13-U113-11t East CV Yard, SoilPie @ Top (8' Depth), OLI 2.85E-01 0.28 SXSL4142 Teledyne; L22187-2 CV Yard Soi - West Side, API -7, OUL 8.75E.01 o.88 SXSL4143 Teledkne, L22187-3 CV Yard Sol -West Side, AP1 7, OLI. 4A*E-01 0.49 SXSL4149 Tekedyne; L22107-4 CV Yard Sol -West Side, API-7, OL__ 5.97Eo2 179E40 385 TABLE 4-MEAN PERCENT OF TOTAL FOR POSIVE NUCLIDES SNECSunple No LAB No. Locedll esecrion H-3 Sr-U Co-" Co-137 Totl CVTumel l WXT,81I869-H1 CVTunelSedentComplosite, L 0.76% 0.07% 99.17% 100.0%

SX9SL99219 111074 Subsulare Smwr t29 (0-5), AY-128, OL1 100 [1% 100.0%

SXSL1063 Tdledyn1e-S;1111841 North CV Yard Soil BA-1 27, 812ZB, Smple S5,OL2 82.64% 17.36% 1oo.o%

SXSL1089 Teledyne13; L111142 North CV Yard Sol AY-1 27, 81(18, Sample 53,0L1 63.38% 31.62% 100.0 SXSL1115 Teledynem-8I29; 1111843 North CV Yard SoilAY-1 28, 804'EI, Sample 2, CLI 71.40% 28.60% 100.0 SXSL1122 Teledyme-1121; L11111B44 North CV Yard Sol AY-1 29,79El,Sample 2, iOU 39.91% 60.09% 1oo.0%

SXSL1130 Tededyawe-l22; 1111846 North CV Yard Soil AX-1 29, 8O S. Salpe t 4, 0L1 16.89% U.W0% 83.03% 100.0 SXSL1132 Tdledym-S23; 1 46 North CV Yard SoilAZ-I30,S 55, SM

. OLI 51.45% 48.55% 100.0%

SXSLI270 BWXT, t5s16-02 AX-1 29, 3-3, Sol, CY SE Side 5 From CV, 8W 1.,,OL1 100m(3% 100 0%

SXSL1281 BWXT, 619t66-11 AX-128, 3-1, Sol, CV Turnsel East 5 FromCY, 8W0El, OLI 1m .(% 100 0%

SXSL2849 Teledynm-7322k L1U77-2 Arjs Wil, A-2, 5 to 1 Depth, OL1 100.iJ0% 100.0%

SXSL2871 Teiledyme-7114; L17t33-11 CY Area - East Yard Drt Pie - bidde, 112Way Up, OL1 1oo.0% 100.0%

SXSL2872 Teedime-719; L178Ut-15 CV Area - East Yard Dirt Pie - Botom (lso top carter), CLO 10f3% 100.0%

SXSL3140 _ BWT,11830-11-1S-11 East CY Yard, SoilPie @6on WestSide (V' Depth), 1 1Wm % 100.0%

SXSL3142 Tebme; L20326-3 Sol Pile,CV Yard, Three Fedt on East Side, SR-37, OLI 0lom% 100.0%

SXSL3145 BWXT,1930-03-1S0- EastCV Yard, Sol Pbe 3' on East Side (61 Depth), OL1 1003 (% 100 0%

SXSL3149 Teedyne; L20326-4 Sci Pie, CV Yard, Six Feet on EastSide, SR-37, OL. 1l0So% 100 0%

SXSL3153 wMT,1830-M3-18-81 East CV Yard, Sdi Pile@Top (S' Depth), OL1 1003(% 100.0%

SXSL4142 Telledne; L22187-2 CV Yard Sal - West SiWe, API -7, OLI 100DQ lo  % 1 0%

SXSL4143 Teledyne; L22187-3 CY Yard Sal - West Sbb, API -7, OLI 100.30% 100t0%

SXSL4149 Telledyne; L22187-4 CV Yard Sl - WestSide, APt-7, OL1 1.55% 9U.45% 100.0%

Mean. nAcr1 il I n nrccI nmnnro II n.0-MAi-nn0 I I Al

.. 1.

U..OD I I I U.W

-J I -. UOO Sig.a 0.241 _009 0282 I::I Mean % of Totsl. 39.20% 0.64% 040% 59.85% 100.00%

2 Sigma.+ Mean 1.03E+0 7.63E-03 2.27E-02 1.40E+00 2.47

% of Total. 41.86% 0.92% S6.91% 9.31% 1w0 %

4 c O'Z_

TABLE 6 - RATIO TO Cs-137 FOR POSITIVE NUCLIDES SNEC Sample No LAB No. Location)lescription H-3 Sr-90 Co-S0 Cs-137 Total 1 CV Tunnel BWXT, 0102059-01 CV Tunnel Sediment Composite, OL-1 7.70E-03 6.65E-04 1.OOE+00 1.01 2 SX9SL99219 111074 Subsuface Sample #29 (0-5'), AY-1 28, OLl- 1.00E+00 1.00 3 SXSL1 063 Teledyne-80018; L1S-11 North CV Yard Soil BA-I 27, 812' El, Sampbe # 5, 0L2 4.76E+00 1.0E+00 5.76 4 SXSL1 089 Teledyne-80019; L91S1142 North CV Yard Sod AY-1 27, 810' El, Sample #3, OL1 2.16E+00 1.W0E100 3.16 6 SXSLI 115 Teledyne-80020; 11S184-3 North CV Yard Soil AY-1 28, 804' El, Swple # 2, OL1 2.50E+00 1.WE+00 3.50 6 SXSL1 122 Teledyne-80021; 119184-4 North CV Yerd Soil AY-1 29, 79W El, Sampl # 2, OL1 6.64E-01 1.00E+00 1.66 7 SXSL 1130 Teledyne-80022; L19184-C North CV Yard Soil AX-129, 803' E, Samle #4, OL1 2.03E-01 1.01 E-03 1.0OE+00 1.20 SXSL 1132 Teledyne-80023; L19184.6 North CV Yard Soil AZ- 30, Sample # 5, OLI 1.06E+00 1.00E+00 2.06 9 SXSL1 270 BWXT, 0118065-02 AX-I 29, 3-3, Soil, CV SE Side 5' From CV, 800 El., OLI 1.00E400 1.00 SXSL1 281 BWXT, 0108055-01 AX-128,3-1, Soil, CV Tunnel East 5' From CV, 800' B. OL1 1.00E+00 1.00 11 SXSL2649 Teledyne-73220; L18077-2 Anulus 1W, A-2, 5 to 10' Depth, OL _ 1.OOE400 1 00 13 SXSL2871 Teledyne-71949; L17838-11 CV Area - East Yard Dirt Pie - Middle, 112 Way Up, OLI 1.OOEi0I) 1.0o 14 SXSL2872 Teledyne-71948; 17838-10 CV Area - East Yard Dirt Pie - Bottom (also top center), OL _ 1.OOE+00 1.0o 16 SXSL3140 BWXT,1030-003-10-01 East CV Yard, Soil Ple @ 6' on West Side (8" Depth), OLI- 1.00E+00 1.00 16 SXSL3142 Teledyne; L20326-3 Soil Pile, CV Yard, Three Feet on East Side, SR-37, OLI 1.OOE+O 1.00 17 SXSL3145 BWXT,1030-W03-10-01 East CV Yard, Sol Pile @ 3' on East Side (6" Depth), OL1 1.00E-10 1_______ 1.0 18 SXSL3149 Telebyne; L20326-4 Soil Pile, CV Yard, Six Feet on East Side, SR-37, OLI .E 1.OE 1.00 19 SXSL3153 BWXT,1030-U03-10-01 East CV Yard, Soil PHe @ Top (6" Depth), OL1 1.OOE+00 1.00 21 SXSL4142 Teledyne; L22187-2 CV Yard Soil - West Side, API -7, OLI ._

1.00E 1.00 22 SXSL4143 Teledyne; L22187-3 CV Yard Soil - West Skde, API -7, OLI 1.IOE.00 1.00 23 SXSL4149 Teledyne; L22187-4 CV Yard Soil - West Side, AP1 -7, OLI I 1tW7E412 1 .OOE+00 1.02 Mean= 1. 89091 10.007699 10. 005808 1 2.90 Sigmae 1.656 0.009 0 000  :._:_:

Mean % of Total=* 65.11% 0.27% 0.20% 34.43% 100.00%

2 Sigma + Mean= 5.20EM00 7.70E-03 2.30E-02 1.OOE+00 6.23

% of Totalv 83.47% 0.12% 0.37% 16.04% 100.00%

5

Table 6 Effective DCGL Calculator for Cs-137 (dpmll00 cmA2) I 1 44306 IdDmIOO cmA2 AI 33229 IdpmM00 cmA2 IZZ 2501mremly TEDE Limit SAMPLE NO(s9) ICV Yard Soil & Boulder Samples - Deacy 12-15-04 l 1 26517 1 1 mMOcm12 edprnAOCMA2 15% -

q.

Individual Sample Input Limits Allowed Beta dpmM00S Alpha dpmMW0 Isotope (pCilg, uCi, etc.) % of Total (dpmtlSU cmA2) dpmM 00 cmA2 mrremiy TEDE cmA2 cm12 1 Am-241 0.000% 27 0.00 0.00 . . 0.00 Am-241 2 C-14 0.0°f3700.......................... C-14 Co- O 5.67E-03 0.403% 7,100 178.640.6317 64 ...........W............ Co 0 sEu-152 0.000% 13,000 0.00 0.00 0.00 A.. Eu-152 6 H-3 5.51E-01 39.203% 120,000,001736923 0.0 .W NotDetectabe . H -3 7 Ni -63 __ 0.000% 1,800,000 . 0.00 0.00 Not Detectabbe . . .WA . Ni.63 8Pu.238_ 0.000% 30 0.00 0.00 . .. .  :  :.A._ __..._0.00Pu230 9 Pu-239 0.000% 28 0.00 0.00 0. 0Pu-239 10 Pu-241 0.000% 8800 .0.00 0.00 Hot Detectable . PU241 5 r0 7.64E-03 0.543 % B0,700 240.63 0.69 63.....

240 .63 Sr0 100.000% 44306 25.0 26936 0 Maximum Permissible dpr_ nM

_ _ A2

_ W_ cm _ _ __ __

6 CO(7 L

Table 7 111111111F 75%

Effective DCGL Calculator for Cs-137 (in pCilg) l 16.70 IpCi/g l 12.53 lpCi/g I SAMPLE NUMBER(s)* 1CV YARD SOIL & BOULDER SAMPLES - Decayed to 12-16-14 I I

17.39% 25.0 mremty TEDE Limit .

1 5.75 lpci/g 1 4.31 1PG/g I 2 4J~e lRJ Check for 25 mremly 7.60% mrem/y Drinking Water (Dl Sample hnput (pCi/g, uCi, 25 mremat TEDE A - Allowed pCi/g for This Sample l Isotope etc.)  % of Total Limits (pCilg) 26 mremiy TEDE mremtj TEDE 5 I Am.241 0.000% 9.9 0.00 0.00 § 2 C-14 0.000% 2.0 0.00 3 Co-60 0.006 0.200% 3.5 0.03 0.04 4 Cs-137 1.00 34.429% 6.6 5.75 3.79 6 Eu-152 0.000% 10.1 0.00 0.00 6 H-3 1.89 65.106% 132 10.87 0.36 1 Ni-63 0.00% 747 0.00 0.00 a Pu-238 0.000% 1.8 0.00 0.00 `4 9 Pu-239 0.000% 1.6 0.00 0.00 Is Pu-241 0.000% 86 0.00 000 11 Sr-90 0.008 0.265% 1.2 0.04 0316 2.90E+00 100.000% I 16.70 4.340- U.3U4 I

Maximum Permissible Maximum To tse This WormatLn, pCi/g Permissible pCi/g sample A Unitrs t e In (26 mrem.V) (4fmremiy) DOMl 7

p SURVEY REQUEST CONTINUATION SHEET -j SR NUMBER I SR-0186 I AREAKLOCATION I SNEC Site SPECIFIC SAMPUNG I SURVEY INSTRUCTIONS OR COMMENTS RESULTS

SUMMARY

FOR SR-0186 SR-0186 was issued to survey and sample material removed from several locations across the SNEC Facility site.

The material will be scanned with Nal detectors by Shonka Research Associates, Inc. sampled by SNEC Rad Con personnel, and transferred to the adjacent PRI area.

The SR required the following radiological measurements:

• Surface Scan Measurements Using Sodium Iodide Detectors (5" X 2") (set to identify Cs-1 37) - 100% scan of Material at a rate not exceeding 4 inches/sec at a distance within 13 inches. The action level is 2.91 pCi/g, Cs-137.

• Surface Scan Measurements Using a Sodium Iodide Detector - 100% scan of suspect material is required.

Scan rate shall not exceed 0.5 meters/sec at a distance not exceeding 2 inches. The action level is 300 gross cpm.

• Soil Samples - obtain approximately 500 cc of material from each 30 minutes of run time. A minimum of two samples is required of each batch.

• QC Repeat Measurements - A minimum of 5% of all surface scan/static measurements and sampling will be re-performed using identical methodology.

• Additional sampling/surveys may be performed at the request of the SR Coordinator.

1. Summary of Results A. Surface Scan Measurements Using a 5" x 2" Sodium Iodide Detectors (set to identify Cs-137) 100% scan is required.

Results: Scan results indicate activity below the action level with one exception. A point source alarm was declared. The material was removed from the conveyor belt and the associated monitoring data was expunged to not improperly bias the results reported fore the remaining material.

B. Surface Scan Measurements Using a Nal Detector of Suspect Material 100% surface scan is required of material identified by SRA as exceeding the alarm point (2.91 pCi/g).

Results: One alarm was indicated during SRA scanning. (Batch Number SRA-05-044-2). Scanning was performed indicating a maximum of 2430 gross cpm on a 1-minute static measurement. The material was removed the conveyor belt.

Page 1 of 2

I SURVEY REQUEST CONTINUATION SHEET I SR NUMBER SR-0186 I AREAILOCATION SNEC Site SPECIFIC SAMPLING I SURVEY INSTRUCTIONS OR COMMENTS C. Soil Samples One hundred thirty-one samples were obtained covering 56 batches.

Results: The highest activity was indicated on sample SX-SL-9469 with 0.84 +/- 0.14 pCig, Cs-137, <0.1 pCilg, Co-60. Positive Cs-137 results ranged from 0.13 to 0.84 pCilg. No Co-60 was identified (typical achieved MDA was 0.1 pCi/g).

Two additional samples (unprocessed) were obtained of material on the conveyor belt during the alarm of batch SRA-05-044-2). These samples indicated 0.6 +/- 0.17 and 0.19 +/- 0.08 pCi/g, Cs-137. No Co-60 activity was indicated (MDA was 0.09 and 0.18 pCUg).

2. Quality Control (QC) Measurements and Comparisons Repeat Scan measurements and Soil samples were performed and met the applicable acceptance criteria established in Section 4.6 of E900-IMP-4520.04. A repeat static measurement was not performed in response to the alarm in batch SRA-05-044-2. This was due to an oversight of the technician. The QAO was notified.

3. Special Notes:

R. Shepherd performed two quality checking inspections. Inspection performed on 12/04104 primarily checked SRA technician's qualifications and observed pre-op checking of detectors. One discrepancy was identified. The technician did not have a copy of the SRA-SXTN-106 Rev. 0 procedure, Operation of the SMCM /Conveyor System". A copy was obtained. An inspection performed on 1/18/05 observed a point source alarm/response by SRA technician and site Rad Con technician to ensure compliance with SR requirements. No discrepancies were identified.

4. Exceptions and Discrepancies: none David Sarge (GRCS) Date Page 2 of 2

SURVEY REQUEST CONTINUATION SHEET SR NUMBER I SR-0190 AREAILOCATION SNEC Site SPECIFIC SAMPLING I SURVEY INSTRUCTIONS OR COMMENTS RESULTS

SUMMARY

FOR SR-0190 SR-0190 was issued to survey and sample material removed from 5 inter-modals and approximately 40 B-25 boxes. The material will be scanned with Nal detectors by Shonka Research Associates, Inc. (SRA), sampled by SNEC Rad Con personnel, and transferred to the adjacent PRI area.

The SR required the following radiological measurements:

• Surface Scan Measurements Using Sodium Iodide Detectors (5" X 2") (set to identify Cs-1 37) - 100% scan of Material at a rate not exceeding 4 inches/sec at a distance within 13 inches. The action level is 2.91 pCi/g, Cs-137.

• Surface Scan Measurements Using a Sodium Iodide Detector - 100% scan of suspect material is required.

Scan rate shall not exceed 0.5 meters/sec at a distance not exceeding 2 inches. The action level is 300 gross cpm.

• Soil Samples - obtain approximately 500 cc of material from each 30 minutes of run time. A minimum of two samples is required of each batch.

• QC Repeat Measurements - A minimum of 5% of all surface scan/static measurements and sampling will be re-performed using identical methodology.

• Additional sampling/surveys may be performed at the request of the SR Coordinator.

1. Summary of Results A. Surface Scan Measurements Using a 5" x 2" Sodium Iodide Detectors (set to identify Cs-1 37) 100% scan is required.

Results: Scan results indicate activity below the action level with two exceptions. A point source and small volume alarm was declared. The material was removed from the conveyor belt and the associated monitoring data was expunged to not improperly bias the results reported fore the remaining material.

B. Surface Scan Measurements Using a Nal Detector of Suspect Material 100% surface scan is required of material identified by SRA as exceeding the alarm point (2.91 pCilg).

Results: Two alarms were indicated during SRA scanning. (Batch Number SRA-05-054-1). Scanning was performed indicating a maximum of 2274 gross cpm on a 1-minute static measurement. The material was removed the conveyor belt.

Page 1 of 2

SURVEY REQUEST CONTINUATION SHEET SR NUMBER I SR-0190 I AREAILOCATION I SNEC Site SPECIFIC SAMPLING I SURVEY INSTRUCTIONS OR COMMENTS C. Soil Samples Five samples were obtained covering batch SRA-05-054.

Results: The highest activity indicated was 1.0 +/- 0.18 pCi/g, Cs-137, <0.15 pCi/g, Co-60. All samples indicted positive Cs-137 ranging from 0.7 to 1.0 pCi/g. No Co-60 was identified (typical achieved MDA was 0.13 pCi/g).

Four additional samples (unprocessed) were obtained of material on the conveyor belt during the alarms of batch SRA-05-054). These samples indicated positive Cs-137 ranging from 0.52 to 0.62 pCilg. No Co-60 activity was indicated (typical achieved MDA was 0.12 pCi/g).

2. Quality Control (QC) Measurements and Comparisons Repeat Scan and soil samples were performed and met the applicable acceptance criteria established in Section 4.6 of E900-IMP-4520.04. A repeat static measurement was not obtained during the response of the point source alarm. This was due to an oversight of the technician. The QAO was notified.

3. Special Notes: none

4. Exceptions and Discrepancies: see section 2.

David Sarge (GRCS I Date I

Page 2 of 2