ML052140136

Rev 0 to Calculation E900-03-032, Top of Seal Chamber 3 - Survey Design, Appendix a to Final Status Survey Report for Saxton Nuclear Experimental Corp Saxton Steam Generating Station Structural Surfaces - Seal Chamber Roofs SS17 (1&2) & SS1

ML052140136
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	08/02/2004
From:	Brosey B FirstEnergy Corp
To:	Office of Nuclear Reactor Regulation
References
E900-03-032, Rev 0
Download: ML052140136 (35)

Text

Appendix A Chamber 3 area Survey Design

SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-03-032 0 y D lo q I of JO Subject Top of Seal Chamber 3 - Survey Design Question 1 - Is this calculation defined as 'in QA Scope'? Refer to definition 3.5. Yes 0 No I Question 2 - Is this calculation defined as a Design Calculation-? Refer to definitions 3.2 and 3.3. Yes 0 No E Question 3 - Does the calculation have the potential to affect an SSC as described in the USAR? Yes El No ED NOTES: If a 'Yes' answer Isobtained 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. If a "YES answer is obtained for Question 3, SNEC Management approval Is required to implement the calculation. Calculations that do not have the potential to affect SSC's may be implemented by the TR.

DESCRIPTION OF REVISION APPROVAL SIGNATURES Calculation Originator B. Broseyl 3 Date -lZt6y Technical Reviewer R. Holmes/ Date Additional Review A. Paynter/ Date Za/ - t.,9 Additional Review Date SNEC Management Approval Date

amp SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 I I Page2of /0 Subject Top of Seal Chamber 3 - Survey Plan 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for the top of Seal Chamber 3 (SC3) (roof and walls). Seal Chamber 3 survey units are shown in Attachment 1-1 & 1-2.

Table 1, Survey Unit Information Survey Units Location Material Types Area Classification Area (mA2)

SS17-1 Walls Above Seal Chamber 3 Roof Concrete/Steel 3 35.4 SS18-1 Roof of Seal Chamber 3 Concrete/Steel 2 20.4 NOTE: There Is <<<2 m2 of steel surface area Included within these survey units. The majority of this steel surface Is severely corroded with portions that are difficult to access.

2.0

SUMMARY

OF RESULTS The following information should be used to develop a survey request for this survey design:

2.1 GFPC Scanninq Criteria 2.1.1 A gas flow proportional counter (GFPC) shall be used in the beta detection mode for the initial scan survey work (Ludlum 2350-1 with a 43-68B probe).

2.1.2 All GFPC instruments used shall demonstrate an efficiency (et) at or above 23.9%

(value used for planning). Detector efficiency factors are presented in the following Table.

Table 2, GFPC Detection Efficiency Results Used for Planning Material Type l l (as %)l ECF %Cs-137 Resulting counts/disintegration l Concrete 0.478 0.5 l 23.9% 0.881 l 0.851 0.179

• Typical SNEC GFPC detector efficiency factors (as of 711/04) are provided in Attachment 2-1.

NOTE 1: Total efficiency should not be less than et value for any instrument used during this survey effort.

2.1.3 An efficiency correction factor (ECF) is applied to compensate for efficiency loss over rough surface areas based on Reference 3.1 criteria and Attachment 3-1.

2.1.4 The amount of detectable beta emitter is dependent on the amount of Cs-137 present in the radionuclide mix. From Reference 3.2 the mix is determined to be 85.12% Cs-137. No other nuclides are credited with providing any additional detectable beta emissions for this mix.

Table 3, Summary Of GFPC Scanning Parameters Instrument Surface to Detector Type Used Area or Structure Material Type Scan Speed Face Coverage MOCscan 0.9' per sec GFPC (beta) SS17-1 & SS18-1 Concrete (2.2 cm/sec) Contact 50% 738 dpm/100 cm2 0.9' per seecAll available in

. designated GFPC (beta) SS17-1 & SS18-1 Steel (2.2 cm/sec) Contact area' 738 dpm/l1O cm2 The scan locations are assigned IAW Table 5-5 of Reference 3.3. See Attachment 1-1 for areas identified for scanning.

'Only lightly corroded and accessible steel surfaces should be scanned using a GFPC beta detection system. A lightly corroded steel surface is typically discolored and may be not entirely smooth, but it must not have significant scale present (surface erosion). When indoubt about surface quality, contact the cognizant GRCS.

?-- SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 Page3of /Lo Subject Top of Seal Chamber 3 - Survey Plan 2.1.5 The action level during first phase scanning is 900 cpm above background. If this level is reached, the surveyor should stop and perform a count of at least 1/2 minute duration to identify the actual second phase count rate from the elevated area. If the second phase count rate is equal to or greater than 1,300 cnm, the area must be identified, bounded and documented to include an area estimate.

2.1.6 Any area or hardware that cannot be adequately surveyed with a GFPC as described in Table 3 above, should be identified for Nal scanning IAW Section 2.2.

2.2 Nal Scanning Criteria 2.2.1 A 2" by 2" diameter Nal detector with a Cs-137 window setting shall be used for gamma scanning these survey units lAW Table 4 parameters.

2.2.2 The conversion factor for Nal survey instruments used shall not be less than 208,302 cpm/mR/h (see Attachment 2-1 for current Nal instrument conversion factors as of 7-1-04).

Table 4, Summary Of Scanning Parameters Instrument Type Material Used Area or Structure Type Scan Speed Surface to Detector Face Coverage MDCscan*

Nal (2- by 2' Cs- V per sec 137 Window) SS17-1 & SS18-1 Concrete (2.54 cmlsec) 2' (5.08 cm) 50% 2.7 pC/g Nal (2' by 2' Cs- 2'per sec 4208 dpm/100 137 Window) ss18-i Steel (5.08 cmasec) ' (5.08 cm) 100% acm 2

The scan locations are assigned lAW Table 5-5 of Reference 3.3. See Attachment 1-1 for areas identified for scanning.

• See Attachment 4-1 to 4-4 for calculation results based on a 100 cpm background value.

2.2.3 The action level during first phase scanning using a Nal instrument is 200 gross com. If this level is reached, the surveyor should stop and perform a count of at least 15 seconds duration to identify the actual count rate of the elevated area.

2.2.4 Based on Nal scanning work, sample areas IAW the following:

2.2.4.1 When an area is confirmed to be above the action level the location should be marked for sampling (see Section 2.5) These areas shall be bounded and documented, and 2.2.4.2 At the highest location encountered during the Nal scanning process.

2.3 DCGLw Values The following Table shows the DCGLw values that were used to plan surveys in these areas. Note that the SNEC facility has no specific volumetric DCGLw value for concrete.

Instead, the soil volumetric DCGLw is used as a planning tool.

With regard to Nal scanning, a Nal detector is used to scan the areas shown on Attachment 1-1. Areas above the action level are then sampled to determine their real concentration and show what fraction of Table 5 values exist in the sampled media.

M< SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 Page 4 of IO Subject Top of Seal Chamber 3 - Survey Plan Table 5, Summary Of DCGLw Values FSS Calculation No. Surface DCGLw (dpml100 cm2) Volumetric DCGLw (pCUg)

E900-04-008 GA = 7,650 (5,737 A.L.) 3.19 (2.39 A.L.) for Cs-137 DCGLw values from Reference 3.2.

2.4 Fixed Point GFPC Static Measurements 2.4.1 The minimum required number of static survey points for each area is provided in Table 6 (see Attachment 5-1 to 5-4 for calculation of minimum No. of random start systematic grid survey points - Compass output). See Attachment 6-1 to 6-2 for calculation of GFPC MDCscan value.

Table 6, Minimum No. Random Start Systematic Grid Survey Points (GFPC)

ISurvey SS17-1 Units Location Walls Above Seal Chamber 3 l Static Points 8

SS18-1 Roof of Seal Chamber 3 8 See Attachment 741 for locations of fixed point measurements.

2.4.2 VSP (Reference 3.4) is used to plot all measurement points on Attachment 7-1.

The actual number of random start systematically spaced measurement points is greater than that required by the Compass computer code because of any of the following:

• placement of the initial random starting point (edge effects),

• odd shaped diagrams, and/or

• coverage concerns 2.5 Sampling of Concrete and Steel Surfaces Sample concrete or steel materials at locations above action levels when scanning with a Nal detector. (see Section 2.2).

2.5.1 A 4" long core bore sample is preferred so that the depth of penetration can be identified. However, when a core bore cannot be taken because of the quality of the concrete, or because of limited access in an area, sampling should remove the first 1" of concrete and yield a volume of at least 200 cc to ensure an adequate counting MDA for Cs-1 37 (a 4" diameter area by In deep = -200 cc).

2.5.2 For steel surfaces above the action level, scrape the surface to collect a sample for gamma scanning by removing as much material as possible in the suspect area.

Document the approximate size of the area where the materials were removed.

Whenever possible, obtain a volume of no less then 25 cc's (200 cc's is preferred).

2.5.3 In general, samples should be collected at all locations where measurements indicate elevated count rates exist above action levels, or where measurement capability is deemed inadequate due to poor geometry.

ta SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 Page 5 of (0 Subject Top of Seal Chamber 3 - Survey Plan

3.0 REFERENCES

3.1 SNEC Calculation No. 6900-02-028, GFPC Instrument Efficiency Loss Study.

3.2 SNEC Calculation No. E900-04-008, "Assessment of E900-03-030, Rev 0 - Seal Chambers

- Survey Plan".

3.3 Plan SNEC Facility License Termination Plan.

3.4 Visual Sample Plan, Version 2.0 (or greater), Copyright 2002, Battelle Memorial Institute.

3.5 ISO 7503-1, Evaluation of Surface Contamination, Part 1: Beta-emitters (maximum beta energy greater than 0.15 MeV) and alpha-emitters, 1988.

3.6 SNEC Procedure E900-IMP-4520.06, uSurvey Unit Inspection in Support of FSS Design'.

3.7 GPU Nuclear, SNEC Facility, SSGS Footprint, Drawing, SNECRM-039, 040 & 041.

3.8 SNEC Procedure E900-IMP-4500.59, "Final Site Survey Planning and DQA".

3.9 MicroShield, Computer Radiation Shielding Code, Version 5.05-00121, Grove Engineering.

3.10 NUREG-1507, "Minimum Detectable Concentrations With Typical Radiation Survey Instruments for Various Contaminants and Field Conditions," June 1998.

3.11 SNEC Procedure E900-IMP-4520.04, 'Survey Methodology to Support SNEC License Termination'.

3.12 NUREG-1575, 'Multi-Agency Radiation Survey and Site Investigation Manual", August, 2000.

3.13 Compass Computer Program, Version 1.0.0, Oak Ridge Institute for Science and Education.

3.14 Microsoft Excel 97, Microsoft Corporation Inc., SR-2, 1985-1997.

4.0 ASSUMPTIONS AND BASIC DATA 4.1 Remediation History The roof of Seal Chamber 3 is located in the footprint of the SSGS area. This area was cleaned-up (general housekeeping) to remove loose material and prepare the area for FSS.

A post remediation type survey was then performed in the area. However, no remediation was necessary with exception of removal of all downcomer steel cover plates to allow access to Seal Chamber 3. Since access to and from the interior of Seal Chamber 3 was via this route, the same radionuclide mix is assumed for this area as was used inside Seal Chamber 3.

4.2 Cs-137's detection efficiency has been checked by SNEC personnel using ISO standard 7503-1 methodology (Reference 3.5). The SNEC facility uses a conservatively low GFPC efficiency as input to the survey design process.

4.3 Survey unit variability (GFPC only) used to plan the number of fixed point measurement locations, is shown in Attachment 8-1.

4.4 An GFPC detector stand-off distance of 0.33" is assumed for all areas to compensate for rough surfaces in each survey unit. This factor corrects the overall efficiency by a factor of 0.88 (see Reference 3.1), as shown on Attachment 3-1.

SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 Page 6 of jlo Subject Top of Seal Chamber 3 - Survey Plan 4.5 The detectors physical probe area is 126 cm2, and the instrument is calibrated to the same source area for Cs-137. The gross activity DCGLw is taken to be 5,737 dpm/100 cm2 x (126 cm physical probe area/100 cm2) = 7,229 (0.8512 disintegration of Cs-137/ disintegration in mix) x ci (0.478) x c, (0.5) x 0.881 (distance factor) which yields -1,296 net cpm above background (Compass calculates 1,301 ncpm as the gross beta DCGLw). The 0.1792 count per disintegration counting efficiency considers only the Cs-137 contaminant present in the sample material matrix, and is calculated by: Ei (0.478) x s5 (0.5) x 0.8512 disintegration of Cs-137/disintegration in mix x 0.881 (efficiency loss factor due to distance from surface) = 0.179 ctsldisintearation.

4.6 Survey units described in this survey design were inspected IAW Reference 3.6. A copy of portions of the SNEC facility post-remediation inspection report are included (see Attachment 9-1 to 9-4). Surface defects (gouges, cracks, etc.), are present within these survey units, yielding a mean rough surface factor of 0.881. Thus the average concentration of the source term will be overestimated by using this factor for all surfaces (GFPC only).

4.7 Inaccessible areas or corroded steel surfaces, or any area where a 43-68 beta probe can not be used, shall be scanned using a 2" x 2" Nal detector.

4.8 MicroShield models containing Cs-137 were developed for this survey design. One slab and one surface model were used to work out Nal scan MDC values (see Attachment 10-1 to 10-3):

1) a 1" thick slab of concrete 12" in diameter with a density of 2.35 g/cc. This model assumes that the majority of the activity resides in no more than the first inch of concrete and that elevated areas are small in diameter. These models are based on previous remediation information from other areas within the SSGS facility.

2) a surface deposition of 12" in diameter to simulate a surface area of concrete or steel. A 1/8" layer of FeOx is assumed to compensate for a heavily corroded steel surfaces.

4.9 The modeled concentration used was 1 pCi/g or 1 pCi/cm2 Cs-1 37, and a full density concrete is assumed. Then the concentration of Cs-137 in the first model is 2.35g/cc x 1 pCig or 2.35E-06 uCi/cc of Cs-137 for slab model, and 1.OOE-06 uCi/cm 2 for the surface model. The calculated MDCscan for these two models is shown in the following table for a typical 2" by 2" Nal detector.

Table 7, Nal Scanning Parameters MateriallModel Estimated BKGND (cts/min) MDCSCAN 1" Concrete Slab (2.35 gIcc 100 Attachment 4-1 & 4-2 = 2.7 pCig Surface Deposition 100 Attachment 4-3 & 4-4 = 4,208 dpml100 cm See attachment 4-1 to 4-4.

4.10 The results of the MicroShield modeling indicate that an exposure rate of approximately 7.888E-05 mR/h is obtained at a distance of 3" (2" inches from the face of the detector),

from the surface of the slab model, and 1.563E-05 mRlh is seen 3 inches from the surface model. Exposure rate is measured to the center of the detector and therefore the air gap between the surface of both models is taken to be 2".

4.11 The majority of the structural surface area is concrete. GFPC measurements of structural concrete are compared to concrete background values (see Williamsburg concrete background values - Attachment 11 -1).

SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 Page 7 of _/

Subject Top of Seal Chamber 3 - Survey Plan 4.12 The scan MDC calculation is determined based on a 1.38 index of sensitivity at a 95%

correct detection probability and 60% false positive rate. In all -cases, the scan MDC is less.

than the gross activity DCGLw for these survey units. A surveyor efficiency factor of 0.5 is assumed.

4.13 No special area characteristics including any additional residual radioactivity (not previously noted during characterization) have been identified in these survey units.

4.14 No special measurements are included for this survey design.

4.15 The applicable SNEC site radionuclides and their associated DCGLw values are listed on Exhibit 1 of this calculation.

4.16 The survey design checklist is listed in Exhibit 2.

4.17 Diagrams shown in this survey design have been developed from Reference 3.7.

4.18 There are no Class I survey units covered by this survey design. Thus area factors do not apply to these survey units.

4.19 The decision error for this survey design are listed on Attachment 5-1 to 5-4 and are justified lAW Reference 3.3 criteria.

4.20 Analysis results (MDA requirements, etc.) will be lAW Reference 3.11 criteria.

5.0 CALCULATIONS 5.1 All complex calculations are performed internal to applicable computer codes or within an Excel spreadsheet previously identified.

6.0 APPENDICES 6.1 Attachment 1-1 to 1-2, diagram/photo of Seal Chamber 3 area.

6.2 Attachment 2-1, is typical calibration information for Nal and GFPC detection systems used at the SNEC facility as of 7-1-04.

6.3 Attachment 3-1, is a calculation result for determining efficiency loss for a GFPC detector as a function of distance from a source.

6.4 Attachment 4-1 to 4-4, is calculation sheets to determine the scan MDC for a Nal detection system using a typical background count rate and a 12" diameter, 1" thick MicroShield slab model, and a 12" diameter surface deposition model.

6.5 Attachment 5-1 to 5-4, are Compass output results for the top of Seal Chamber 3.

6.6 Attachment 6-1 to 6-2, are calculation sheets used to determine the scan MDC for a GFPC detection system.

6.7 Attachment 7-1, is the random start, systematic grid diagram of GFPC fixed point survey locations.

6.8 Attachment 8-1, is the GFPC variability measurements from the roof of Seal Chamber three (3).

6.9 Attachment 9-1 to 9-4, are sections of survey unit inspection reports for the top of the Seal Chamber 3 area.

EX E SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 l Page 8 of /j0 Subject Top of Seal Chamber 3 - Survey Plan 6.10 Attachment 10-1 to 10-3, is MicroShield output for two (2) models used for planning Nal measurements. Model one is a 1"thick slab. Model two is fora surface deposition.

6.11 Attachment 11-1, are background measurements of concrete using a GFPC instrument in an non-impacted area (Williamsburg).

SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 Page 9of /

Subject Top of Seal Chamber 3 - Survey Plan Exhibit I SNEC Facility Individual 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 (bI (dpml100cm 2) (Surface & Subsurface) (Surface & Subsurface)

(pCeg) (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-1 37 2.8E+04 6.6 397 Eu-152 1.3E+04 10.1 1440 H-3 1.2E+08 132 31.1 Ni-63 1.8E+06 747 1.9E+04 Pu-238 3.OE+01 1.8 0.41 Pu-239 2.8E+01 1.6 0.37 Pu-241 8.8E+02 86 19.8 Sr-90 8.7E+03 1.2 0.61 NOTES:

(a) While drinking water DCGLs will be used by SNEC to meet the drinking water 4 mrem/y goal, only the DCGL values that constitute the 25 mremly 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).

?L, SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-03-032 0 l Page 10 of 1° Subject Top of Seal Chamber 3 - Survey Plan Exhibit 2 Survey Design Checklist (From Reference 3.8)

Calculation No. l

______E900-03.32 l SSI7.1 & SSI8-1 _ _ _ _ _ _ _ _ _ _

Status Reviewer ITEM REVIEW FOCUS (Circle One) Initials & Date 1

I Has a survey design calculation number been assigned and is a survey design summary a N/Al A-description provided? _____ Aft 2 Are drawings/diagrams adequate for the subject area (drawings should have compass es, N/A

____headings)? rt 3 Are boundaries properly identified and is the survey area classification clearly indicated? Ye N/A A P ZIDy 4 Has the survey area(s) been properly divided into survey units LAW EXHIBIT 10 5 Are physical characteristics of the area/location or system documented? ge N/A 6 Is a remediation effectiveness discussion included? Yes,CNIi Have characterization survey and/or sampling results been converted to units that are ( NIA comparable to applicable DCGL values? 0 8 Is survey and/or sampling data that was used for determining survey unit variance included? Yes NIA 9 Is a description of the background reference areas (or materials) and their survey and/or Yes N/A sampling results included along with a justification for their selection?

10 Are applicable survey and/or sampling data that was used to determine variability included?

11 Will the condition of the survey area have an impact on the survey design, and has the probable impact been considered inthe design?

R NIA Has any special area characteristic including any additional residual radioactivity (not al 12 previously noted during characterization) been idenrified along with its impact on survey Yes, G design? a 13 Are all necessary supporting calculations and/or site procedures referenced or included? ne N/A 14 Has an effective DCGLw been identified for the survey unit(s)? lN/A N/A 15 Was the appropriate DCGLEmc included in the survey design calculation? Yes, nN.

16 Has the statistical tests that will be used to evaluate the data been identified? s N/A 2Ye 17 Has an elevated measurement comparison been performed (Class I Area)? Yes, 18 Has the decision error levels been identified and are the necessary justifications provided? (Y e/s 19 Has scan instrumentation been identified along with the assigned scanning methodology? Yes NIA /i 20 Has the scan rate been identified, and isthe MDCscan adequate for the survey design? Yes, N/A 21 Are special measurements e.g.. in-situ gamma-ray spectroscopy required under this design, Yes, N/A and is the survey methodology, and evaluation methods described?

22 Is survey instrumentation calibration data included and are detection sensitivities adequate? Yes A .-

7 23 Have the assigned sample and/or measurement locations been clearly identified on a diagram o e'NA or CAD drawing of the survey area(s) along with their coordinates? I 70 24 Are investigation levels and administrative limit adequate, and are any associated actions 7 clearly indicated?

25 For sample analysis, have the required MDA values been determined.? Yes N/A o /

26 Has any special sampling methodology been identified other than provided in Reference 6.3? Yes N/A NOTE: a copy of this completed form or equivalent, shall be included within the survey design calculation.

North Wall SSI7-1

[op of walls are rough -

it I~Northn Wall - SS17-1 II North Lower 50%

SS17 V SSt W7-1 EaI-West VVaiIl East Wall Roof of Seal Chamber 3 - SS18-1 Scanning Area for GFPC Instrument = Shaded Sections Lower 50% of all Walls ATTACHMENT 2- *1-

CAD ATTACHMENT-I!

2350 INSTRUMENT AND PROBE EFFICIENCY CHART JUL 3 0 2.- 94 7/01/04 (Typical 2" by 2" Nal (Cs-137 W) Conversion Factors)

Instu' Cal Due l AP# l Probe l Cal Due J cpmlmRlh 9862 5/18 /05 R LK, Y 2ll680 Pkl 5/1 8/05 214.882 98647 5/18105 G &Y 211667 Pk J 5/18/05 1 218.807 129423 5/18/05 P&Y __ _ 2 211687 Pk I 5/180(5 1 213.53)9 I 17573 1 5/1 8/05 C0 &Y _2 11_674 Pk 5/18/05 212.173 117566 419105 G&R l 185852 I Pk 4/13/05 2209.862 j I i -

1 126183 11/19/04 l B&R l l 20628() Pk 112/12/04 190,907

_ _ I _ _ I _ _ I _ _ i __ I _ _ I __

129429 1 ]/3/04 &W J________ 206283 Pk 110/31/04 177185 126198 1 1/03/04 IR&W\ _ _ 19602'1Pk 5/25/05 209.194 126172 6/07/05 G&W 196022 6/07/05 I 208.302 I I f 4/09"05 129440 0&-W J 210938 Pk 4/14/05 205.603

_ i__ ' 6_ I _ _ _ _

120588 6/08/05 B&W __ 185844 Pk l 6/09/05 216.654 95361 6/250i5 P&A _L5686 j8/06 5 21l.799 2350 INSTRUMENT AND PROBE EFFICIENCY CHART 7/01/04 (Typical 43-68 Beta Efficiency Factors) lDifl;:rcnm InsimmnemtPrbes Cal. 137c l ('elu:I" 0onl! ins;.mnsini. lonivi wo I )e INST 43-68 PROBE 44-10 PROBE INST # C/D PROBE C/D PROBE C/D BETA ALPHA EFF EFF 79037 04/05/05 122014 04/23/05 . s21 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 ATTACHMENTZ - t

JUL 3 02004i Ii U.. 3. x

__III Cs-1 37 Efficiency Loss with Distance From Source 1.0 Data: Datal1Loss 2----------- Model: ExpDecayl ChiA2 = 0.00018 C

0 0.8 yo 0.03536 +0.02118 I. xO 0 +/-O C-, . - Al 1.00693 +0.01 809 L..

LL ti 1.61706 +/-0.07558

>1 0.6 C

w) \_ Fit = yO+A1 eA(4x-xO)tlt) 0.4 0.2 -4

0. I 1 I

• I 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Inches from 150 cm2 Source ATTACHMENT 3

• I

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JUI 3*C)2P'f wvhere:

b = backgroundin counts perminute b= background counts in observationinterval Corn = Na! manufacturersreportedresponse to energy ofcontaminant(cpm/uR/h) d = index ofsensitivity (Table 6.5 MARSSIM) 1.38 = 95% of correctdetection's. 60%faLse positives HSd = hot spot diameter (in centimeters)

MDCscan = Minimum Detectable Concentrationforscanning (pCi'g)

MDCRI =Minimum Detectable Count Rate (ncpm)

MDCRsrVyor =MDCRI correctedby humanperformancefactor (ncpm)

MDER =Minimum Detectable Exposure Rate (uR/h)

MS,,uW = MicroShieldoutput exposure ratefor I pCi/gof contaminant (n7R/h) 01 = obervation Interval(seconds) p = humanperformancefactor SR = scan rate in centimeters per second 7/29120f4 AJ 9-2 .5onf 5

Nal Scan MDC Calculation - Surface Nal Scan MDC Calculation - Surface Deposition UL 3 02004 li%= 106' p. 5 H. "4 SRj54 NIXT;38

• '5T -T Conv .--;2O830A ,TW Oi=6 ObservationInterval (seconds)

(b-o i) 60 MDCR i = (d-i7) -60 i

-MDCQW`~3 net counts per minute MDCRi MDCRsu MCsulrveyor=- LP 4hDCR:j4- 6-1.'iSzi7i net counts per minute MDCR surveyor MDER=

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--, i108A8 tz,-Aq dpm/100 cm2 7/2q/2tXA4 A-HpowrvsAjr 1-3 4 nf fi

Nal Scan MDC Calculation - Surface JUL 3 0 2004 where:

b = backgroundin counts perminute bi backgroundcounts in observation interval Conv - Nal manufacturersor calibrationinformation reportedresponse to energy ofcontaminant (cpm/uR/h) d = index ofsensitivity (Table 6.5 MARSSIM), 1.38 = 95% ofcorrect detection's, 60%false positives HSd = hot spot diameter (in centimeters)

MDCscan = Minimum Detectable Concentrationforscanning (pCilcm2)

MDCRj =Minimum Detectable Count Rate (ncpm)

MDCRun oF =MDCfR, correctedby human performancefactor(ncpm)

MDER =Minimum DetectableExposure Rate (uR/h)

MS,, ,, =MicroShieldoutput exposure rateforI pCi/cm2 ofcontaminant (mR41) 0, = obervation Interval (seconds) p = humanperformancefactor SR = scan rate in centimeterspersecond 7/2g/2m4 4ACHwC .'Wr 5> f:

JUL 30 2004 Building Surface Survey Plan Survey Plan Summary Site: TOP OF SEAL CHAMBER 3 Planner(s): BHB Survey Unit Name: TOP OF SEAL CHAMBER 3a - WALLS Comments:

Area (m2 ): 35 Classification: 3 Selected Test: WRS Estimated Sigma (cpm): 34.5 DCGL (cpm): 1,301 Sample Size (N/2): 8 LBGR (cpm): 1,200 Estimated Conc. (cpm): 0 Alpha: 0.050 Estimated Power. 1.00 Beta: 0.100 Prospective Power Curve

• o1 W.9 I~~ ~ I"1 A..

_ 0.8

- 0.7 c1 t 0.6 V* 0.5 _ _I

=

0.4 C

I~ _

EO.

I E' 021 r- 0.

0 200 400 600 800 1000 1200 1400 Net Beta (cpm)

- Power - DCGL - - Estimated Power

- LBGR

• l-beta vl.0.0 713012004 COMPASS v1.0.0 COMPASS 713012004 Page 1 AfoC pelo- 4s,-

YI.i 3 0 2004 Building Surface Survey Plan Contaminant Summary DCGLw Contaminant (dpml100 cm')

Gross Activity 5,737 Beta Instrumentation Summary Gross Beta DCGLw (dpm/100 cm2): 5,737 Total Efficiency: 0.18 Gross Beta DCGLw (cpm): 1,301 ID Type Mode Area (cm 2 )

24 GFPC Beta 126 Contaminant Energy' Fractionr Inst. Eff. Surf. Eff. Total Eff.

Gross Activity 187.87 1.0000 0.48 0.37 0.1792 "Average beta energy (keV) [N/A indicates alpha emission]

'Activity fraction Gross Survey Unit Mean (cpm): 306* 35 (1-sigma)

Count Time (min): 1 Number of Average Standard MDC Material BKG Counts (cpm) Deviation (cpm) (dpm/100 cm')

Concrete 31 306 34.5 372 COMPASS v1.0.0 7130J2004 Page 2

-A tm~c0-PI"wt- C-Z

JUL 30 2004 (0Building Surface Survey Plan Survey Plan Summary Site: TOP OF SEAL CHAMBER 3 Planner(s): BHB Survey Unit Name: TOP OF SEAL CHAMBER 3b - ROOF Comments:

Area (M2):

• 20 Classification: 2 Selected Test: WRS Estimated Sigma (cpm): 34.5 DCGL (cpm): 1,301 Sample Size (N/2): 8 LBGR (cpm): 1,200 Estimated Conc. (cpm): 0 Alpha: 0.050 Estimated Power 1.00 Beta: 0.100 Prospective Powver Curve t

_ 0.8 - I p.. I

0.8 - I I - i 0.5

- V 0.6 I L I

- I I I I

• C0.3 I II e 02 II

= 0.1 II I I I I I 0 200 4Cl0 600 800 1000 1200 1400 Net Beta (cpm)

- Power - DCGL - - Estirnated Power

- LBGR

• I-beta 7130/2004 Page 1 COMPASS vl.0.O COMPASS v1.0.0 7130/2OD4 Page I

,q"cHm6,,tvi- -T-3

JUL 3O2004 Building Surface Survey Plan Contaminant Summary DCGLw Contaminant (dpml1 00 cm2)

Gross Activity 5,737 Beta Instrumentation Summary Gross Beta DCGLw (dpml1OO cm2: 5,737 Total Efficiency: 0.18 Gross Beta DCGLw (cpm): 1,301 ID Type Mode Area (cm2 )

24 GFPC Beta 126 2

Contaminant Energy 1 Fraction Inst. Eff. Surf. Eff. Total Eff.

Gross Activity 187.87 1.0000 0.48 0.37 0.1792 1

Average beta energy (keV) [NIA indicates alpha emission]

2 Activity fraction Gross Survey Unit Mean (cpm): 306

• 35 (1-sigma)

Count Time (min): 1 Number of Average Standard MDC 2

Material BKG Counts (cpm) Deviation (cpm) (dpml100 cm )

Concrete 31 306 34.5 372 COMPASS vI.0.0 7130/2004 Page 2

,qTMCHcM6r#'r 4-1

JUL 3 02004 Beta Scan Measurement MDC Calculation Top of Seal Chamber 3 i :=.478 e s. :=.5.85119..881 b:=306 p:=

. I . .. --. -,

Wdf:= 8 . Si:=!2.2 d :=138 A:=)00 Wd ,

- -= 4 ObservationInterval (seconds) - , ;;. W d,. ObservationInterval (seconds)

,",t;-'- sr.

." " . , . . , 4 e 'Frri (b.oi) 11--tll 60 e -=.179 b i = 20.4 Counts in observation Interval (Cress00a)

C = 7.891 9

MDCR :=(d .,Th7) ..

0M kbC'R'j- --93-5 ! net counts per mingite MDCRI-Fb

=399.494

'- ... .9 , 1 J gross counts per minute 1AfDCR i

=23.4 net counts per minute in observation interval oi AfDCscan:=CMDCR i MDC',can=737 7-35 ' dpm per 100 cm2

_ ... . . .... . .o . _ .

MAMt M. 6 3&14S3 EqnfioM6.9£&6-10.an NLMR~G-t5O7 ha 6-15106-1-Y 7/30/204 34 7/30/0-/

JUL 3 0 2004 where:

b = background counts per minute bj= backgroundcounts in observation interval p = humanperformancefactor Wd = detector width in centimeters Sr = scan rate in centimetersper second d = index of sensitivity (Table 6.5 MARSSIM), 1.38 = 95% ofcorrect detection's, 60%ofalse positives MDCSC,,,, = Minimum Detectable Concentrationforscanning (dpm/l00 square centimeters)

C = constant used to convert MDCR to MDC Ei =instrumentefficiency (counts/emission) r, =sourceefficiency (emissions/disintegration)

A = instrumentphysicalprobe area (in square centimeters)

MASM Pam 6-3S 6-43 Ewa6-9 A6&1.2 d NURMG15M.

Pam &ISt. &17 4 7/30/2004 AtfPV wr- C-Z

Class 3 i Vorth Walli I

Class 3 Class 3 West Wall East Wall l Ciass 2 1i TOP OF SEAL, CHAMBER 3 GFPC Fixed Point Measurement Locations IC.

I C_-

. C:>

!, 4p-PifoCo-rsr- 7-/

JUL 30 2004 SEAL CHAMBER 3 ROOF Variability Measurements SR-049 126179 JG1135 Time Detector Counts Count Time (sec) Mode Designator FSS-463 BHB __

Sfe CF(cpm) I 0 Shielded Unshielded NET cpm 2 SC3-FP1S 12/3N2003 12:51 1 1.89E+02 60 SCL Shielded 1.89E+02 l . ......

f 3 SC3-FP1U 12N2003 12:52 1 2.84E+02 60 SCL Unshielded P .  :.x...: l2.84E+02 9.50E+01 4 SC3-FP2S 12N2003 12:54 1 2.30E+02 60 SCL Shielded 2.30E+02 . .***;

5 SC3-FP2U 12/2003 12:55 1 2.76E+02 60 SCL Unshlelded .:. P i 2.76E+02 4.60E+01 6 SC3-FP3S 12/3/2003 12:56 1 2.06E+02 60 SOL Shielded 2.06E+02  :. ...  :...:

7 SC3-FP3U 12/2003 12:57 1 2.54E+02 60 SCL Unshielded 3  :..: s 2.54E+02 4.80E+01 8 SC3-FP4S 12/2003 12:59 1 2.09E+02 60 SCL Shielded 2.09E+02 .  ::...

9 SC3-FP4U 12/32003 13:00 1 2.70E+02 60 SQL Unshielded 132.70E+02 6.-10E+01 10 SC3-FP5S 12/3/2003 13:02 1 2.28E+02 60 SQL Shielded 2.28E+02 ________

11 SC3-FPSU 12/3/2003 13:03 1 2.92E+02 60 SCL Unshielded P 2.92E+02 6.40E+01 12 SC3-FP6S 1232003 13:05 1 1.40E+02 60 SOL Shielded 1.40E+02 ..  :

13 SC3-FP6U 12/32003 13.06 1 1.77E+02 60 SQL Unshielded fi 1.77E+02 3.70E+01 14 SC3-FP7S 12/3/2003 13:07 1 1 27E.02 60 SQL Shielded 1.27E+02 ____

15 SC3-FP7U 12/3/2003 13:08 1 1.94E+02 60 SQL Unshielded _ m _. _.- 1.94E+02 6.70E+01 16 SC3-FP8S 12/3/2003 13:10 1 1.48E+02 60 SQL Shielded 1.48E+02 -::, __

17 SC3-FP8U 12/2003 13:11 1 1.86E+02 60 SCL Unshielded _  : 1.86E+02 3.80E+01 18 SC3-FP9S 12/32003 13:12 1 1.38E+02 60 SCL Shielded _ 1.38E+02 - E ______

19 SC3-FP9U 12/3/2003 13:13 1 1.90E+02 60 SQL Unshielded B i .:.:;., 1.90E+02 5.20E+01 20 SC3-FP10S 12/3/2003 13:15 1 1.30E+02 60 SQL Shielded 1.30E+02 .:.:.:f.

21 SC3-FP10U 12/3/2003 13:16 1 1.84E+02 60 SQL Unshielded __f__ -,if.. 1.84E+02 5.40E+01 22 SC3-QC9S 12/3/2003 13:17 1 1.38E+02 60 SQL Shielded 1.38E+02 . . _____

23 SC3-OC9U 1232003 13:18 1 2.OOE+02 60 SQL Unshielded B. 2.OOE+02 6.20E+01 Minimum- 1.27E+02 1.77E+02 3.70E+01 Maximum= 2.30E+02 2.92E402 9.50E+01 Mean = 1.71 E+02 2.28E+02 5.67E+01 Sloma 4.12E+01 4.65E+01 1.62E+01 gPt~co-moVair S-i

JUL 3O0209's.

• . hIaYfhUW ff U2' IL.

D Exhibit I Survey Unit tnspecton Check Shot ORIGINAL

.:i .. , SECTION 1 BURVEY umir INSPECTION DESCRIP N Survey Unit X SS17-1, SS18-1 Survey Uni Location SSGS - Top of Seal Chamber 3 - Floor and Iuve - uvy oanWalls Datel 7127104 Time 0900 Inspedion Team Members D. Sarge

• 2

.. 1 RVN UNIT INSPECtION SCOPE '

Inspection Requirements (Check the appropriate Yes/No answer.) Yes No WNA

1. Have Sutfic.nt curveya (i.e.. poa remediation. chdntctenzallon, etc.) been ottained for the survey unit? X

2. De the curveys (frcm Ouestion 1)demonstrate that the survey uni will most l~kely pass the FSS7

3. Is the physical work (I e , tmemdlatlon & hovsekeeping) in or around the survey unit complate? X

4. Have all tools, non-permanent equipment. end material not needed to perform the FSS been removed7 X S. Are the survey surfaces relatively tree cftlcsc debins (i.e.. dirt, concrate dui4, metal rilings. elc.)? _

6 Are the survey surfaces relatively free of liquids (i.e. water, moisture. ol, etc.)' X

7. Are the survey surfaces free of all paint, which has the potential to shield radiation? X

a. Have the Surfaca Measurement Test Areas (SMTA) been established? (Refer to Exhlblt 2 for instructions.) x

9. Have the Surface Measurement Teom Areas (SMTA) data ceen collectedV (Refer to Exhibl: 2 for instructions.) X

10. Are Ihe survey surtr co easily accesibla? (No scaffolding, high reach. etc. Is ncdcd to perform the SPS) _

It. Is Ugh;Ung adequate to perform the FSS? X

12. la the area indurtraUy safe to perfcrm the FSS7 (Evaluate pcenlial tall & trip hazards, confined spaces, etc.) X _

13. Have phettrspns been takrt zhcring thn oweralt conditon of the area! X

14. Have all unsatisfactory conditions been resolved? lx NOTE: If a 'No answer is cbtained atove. the insplor should immediately correct the problem or initlate conective aetionrs through the responsible SOe department. as asplOCabe. Document aeions taken and/or justifcatiOnS In the Comnmetn section below. A,,c3t additional sheets as necessary.

Comments Response to Questaon 6: Free standing water is present throughout floor surface in low-lying areas.

Survey Unit Inspector (print/sign) D. Sarge J IDate l 7/28/04

^*%Wr 9-/

Q/0 10 3910d N03G~d AiI113: 33NS L1EZGE9018 E£:11 t00Z/8Zj

JIII R 0 MMl PaJ- IGIN'AL WFDMAN diL I EXHI-lT 3 Surface Measurement 'rest Area (SMTA) Data Sheet

-. !. .7 .. *.~  :.. $CVbON I1, IDESCRIPTION .

SMTA Number SMTA-SS18-1.2 SurveyUnitNumber 5S18-1 SMTA Location l Top of Seal Chamber #3 Floor (East)

Survey Und Inspector D. Sarge Date 7128104 Time 0815

>SECTION 2-CALPER INF ORMATION.& PERS. NNE -iY . .; .-  ;;:

Caliper Manufacturer N/A Caliper Model Number NrA Caliper Serial Number N Calibration Due Date (as applicable) N/A Rad Con Technician I D. Sarge IDate 07128t04 Time 0815 Survey Unit Inspector Approval I D. Sge / i Date 7128/04 SEc!i - iR iE . iL:S;.

SMTA Grid Map & Measurement Results in Units of mm (insert Results in White Blocks Below) Comments

.r i,, 13....

......-¢ !j.... 13 25 i31

• Surface has cracks and chipping occurring in 5.2 2' 8.5 145 110 9.8 areas.

'i "F 1>t.'_ 14 22..... ^.. .........

14 11e 11.5 4.0 16.4 10.2 3 Z 16 2 2 14 2.0 15.3 9.0 15.1 6.1

- - --- 2

' i'. .i19 ~  ::16 ~ 22 . .. 21 ' 34 "

73 1.6 3.3 1.2 11.6 35 17 23 . 21 v365 40 2.8 9.0 76 0.3 .0 12 . 24 .. -:

10.8 7.7 11 58 11 5.

Average Measurement -83 mm Additional Measurements Required Floor surface around downcomers has surficial cracking/chipping at depths up to 1.5 inches.

Internal surfaces of downcomers indicated some pitting/scaling.

Seven 5 inch holes are present on flor (south edge) Depth Is approx. 3.5 inches.

1. qttvCHfliwgrf9-T2.

zo 3 9vd ~c DdNC3C~a AiIIIOV. 03-NS LIEZGSE91'8 EG:11 V00Z/8Z/L0

JUL 3 0 2004 I(DJiJAi INFDR~ltAON EXHIBIT3

-'7~li OJRiLGi uimNAent Test Arco (SMTA) Data Sheet 1.SECTION 1.-.DE8CRlPTION  :: -

SMTANumber SMTA-SS18-1-1 Survey Unit Number SS1B-1 SM- A Location Top of Seal Chambcr #3 Floor (West)

Survey Unit Inspector D. Sarge Date 7(28104 Time 080 4.: : ..- .SECT&IN 2- CALIPER iNFORMAT1ON &lLPtRSONNElN.OLVED -.

Caliper Manufacturer N/A Caliper Model Numb;er NtA Caliper Serial Number NtA Calibration Due Date (as applicable) N/A Rad Con Technlclan i D. Sargw l I-Date l 07R28104 Time i 0800 Survey Unit Inspector Approval ID. Sarge I Date 7/28104

9- '-;-,-, . ' ';.

:.

,i.. ; N- MAUR E .E8ULTS RE8E s . . .

SMTA Grid Map & Measurement Results In Units of mm Comments (Insert Results in White Blocks Below) t 7 I4 t i11 -3 263r; ;>

• Surface has cracks in areas.

1.4 3.6 8.4 4.1 34 40

'.> 2  ; 6 >, 14^ :2>  ::2;.3o.

43 48 1.8 1.6 3.7 40 2.5 03 t.6 3,0 2.1 1.1 4 10 ioS II i 2 r  ;;231 ' 34^-

36 2.0 38 3'7 23 50 53 41 1A 6.4 63 3.3

£. 21: 2.'13 f 24 35 i8 50o 26 2.4 75 j 35 e88 Average Measurement -3.6 mm Additional Measurements Required Floor surface around downcomers has surficial crackinglchipping at depths up to 1.5 inches.

Internal surfaces of downcomers indicaled some pifting/scaling.

AnytP04n0 d90-3C7

~gNO3GV AII-1I3V 03NS L!EZSE9?'IS EG:TT VOOZ/8Z/L0 P70 3E)Vd

JUL 302004 4 JGNAAL IRJFORMA1W?4H onUW EXHIBIT 3 Surface Measurement Test Area (SMTA) Data Sheet t,; ;::. - I... ..

• ECTIOM 1-DESCRIPTION ..... ... ... : -`

SMTA Number  ! SMTA-SS17-1-1 Survey Unit Number SS17-1 S;UTA Location Top of Seal Chamber #3 Wall (East)

Survey UnitInspector D. Sarge Date 7/28/04 Time 0900 SECTiON 2 . ALIPER INORMAtIoN & PERsoNNELiNVOLVt:.D ... ,

Caliper Manufacturer N/A Caliper Model Number N/A Caliper Serial Number N/A Calibration Due Date (as applicable) NIA Rad Con Technician ID.Sarge I 6hJt ,, Date 07/28104 Time I 0900 Survey Unit Inspector Approval ID. Serge I Date 7/28104

.Y .; .... 'SEC ,- OM RESULTS:  ; ...  : -. .: .  :

SM TA Gnd Map & Measurement Results in Units of mm C et (Insert Results in White Blocks Below) Comments

- . 13 - 2 .i1 . Grid #22 has 2' conduit protruding wall approx.

1.4 2.0 20 l .5 0.2 2.7 Grid #24 has 1- stud protruding wall approx. 1'.

14 2 .

• East wnll surface is similar to north and west

. 09 O.S 0.4 1.2 Zs5 wals.

1.5 0.1 0.1 1.4 0.4 30 04 1 05 D8 04 Q1 o oRe 1.0 078 0.4 06 7.3 10 1.8 Average Measurement - 1.2 mm Additional Measurements Required A~hicIl1ew~r 9-1 EG:11 VG0Z/8Z1L0 sa 39Vd S SdN03~Ivd A1I1IZ3).d Z)34S LIUES.99tIS

MicroShield v5.05 (5.05-00121)

GPU Nuclear Page :1 File Ref:

DOS File: SLAB3.MS5 Run Date: July 29, 2004

.!-3 flfl Run Time: 9:46:14 AM Checked:

Duration : 00:00:01 Case

Title:

12" Diameter

Description:

Cs-137 @ 1 pCilg in 1" Thick Slab Geometry: 8 - Cylinder Volume - End Shields Y

Source Dimensions Height 2.54 cm 1.0 in Radius 15.24 cm 6.0 in X Dose Points X Y z

1. 1 0 cryn 10.16 cm 0 cm 0.0 ir1 4.0 in 0.0 in z

Shields Shield Name Dimension Material Density Source 113.097 in' Concrete 2.35 Air Gap Air 0.00122 Source Input Grouping Method: Actual Photon Energies Nuclide curies becquerels uCi/cm3 Ba/cnm3 Ba-1 37m 4.1201 e-009 1.5245e+002 2.2231e-006 8.2255e-002 Cs-1 37 4.3553e-009 1.6115e+002 2.3500e-006 8.6950e-002 Buildup The material reference is: Source Integration Parameters Radial 40 Circumferential 40 Y Direction (axial) 40 Results Energy Activity Fluence Rate Fluence Rate Exposure Rate Exposure Rate MeV photons/sec MeV/cm 2/sec MeV/cm 2/sec mR/hr mR/hr No Buildup With Buildup No Buildup With Buildup 0.0318 3.156e+00 6.355e-06 7.682e-06 5.293e-08 6.399e-08 0.0322 5.823e+00 1.222e-05 1.486e-05 9.832e-08 1.1 96e-07 0.0364 2.119e+00 6.726e-06 8.749e-06 3.821e-08 4.971e-08 0.6616 1.372e+02 3.202e-02 4.057e-02 6.207e-05 7.865e-05 0%CWOM610 0.-1

2

vo rile: SLAB3.MS5 Run Date: July 29, 2004 p&un Time: 9:46:14 AM Duratifaa.n: 00:00:01 J.U L f3i0 2 I Activity Fluence Rate Fluence Rate Exposure Rate Exposure Rate MeV Dhotons/sec MeV/cm 2 /sec MeV/cm 2 /sec mR/hr mR/hr No Buildup With BuilduD No Buildup With Buildup TOTALS: 1.483e+02 3.204e-02 4.060e-02 6.226e-05 7.888e-05

. Atftc'+m,5"-r 10-2

MicroShield v5.05 (5.05-00121)

GPU Nuclear JUL 3 0 204 Page :1 File Ref:

DOS File: SURFC.MS5 Date:

Run Date: July 29, 2004 By:

Run Time: 9:40:56 AM Checked:

Duration : 00:00:00 Case

Title:

Surface Source

Description:

12" Diameter Model Geometry: 3 - Disk Source Dimensions Radius 15.24 cm 6.0 in Dose Points x Y z

1. 1 7.62 cm 0cm 0 cm 3.0 in 0.0 in 0.0 in Shields Shield Name Dimension Material Density Shield I .125 in Iron Oxide 5.1 Air Gap Air 0.00122 Source Input Grouping Method: Actual Photon Energies Nuclide curies becquerels uCilcm2 B/cnlcm Ba-137m 6.9026e-01 0 2.5540e+001 9.4600e-007 3.5002e-002 Cs-137 7.2966e-010 2.6997e+001 1.OOOOe-006 3.7000e-002 Buildup The material reference is: Shield I Integration Parameters Radial 40 Circumferential 40 Results Energy Activity Fluence Rate Fluence Rate Exposure Rate Exposure Rate MeV photons/sec MeV/cmn2/sec MeV/crrm/sec mR/hr mR/hr No Buildup With Buildup No Buildup With Buildup 0.0318 5.287e-01 5.791e-10 6.709e-1 0 4.824e-12 5.589e-12 0.0322 9.755e-01 1.438e-09 1.670e-09 1.157e-11 1.344e-1 I 0.0364 3.550e-01 7.257e-09 8.723e-09 4.123e-11 4.956e-11 0.6616 2.298e+01 6.973e-03 8.064e-03 1.352e-05 1.563e-05 TOTALS: 2.484e+01 6.973e-03 8.064e-03 1.352e-05 1.563e-05 tq*CtjM6rNT- 1,0-3

Williamsburg Concrete Background Measurements

,1111 .1n 9-n 37122N21 Instrument 9534S RLAM6220 Time Detector Counts Count Time (sec) Mode Designator FSS-001 8H8 0 BKGND 11412002 8:52 1 7.26E+03 1800 SCL Inital Background p 1 Source Check 11412002 9:07 1 1.79E405 60 SCL Source p 2 BKGND 1/412002 10:05 2 4.40E+01 1800 SCL Inital Background a Co.cete CDrel) o. I ° 14 Source Check 114/2002 10:39 2 1.51E+05 60 SCL Source a Shielded Unshielded 15 CON AlS 114/2002 13:00 1 2.78E+02 60 SCL Shielded 2.78E+02 l-_--

16 CON A1U 1/412002 13:02 1 3.88E+02 60 SCL Unshielded R 3.88E+02 17 CON A2S 11412002 13:20 1 2.39E+02 60 SCL Shielded 2.39E+02 :_--

18 CON A2U 1/4/2002 13:21 1 2.22E+02 60 SCL Unshielded ft  : -: 2.22E+02 19 CON A3S 1142002 13:28 1 2.39E+02 60 SCL Shielded 2.39E+02 20 CON A3U 114/2002 13:30 1 2.62E+02 60 SCL Unshielded f . 2.62E+02 21 CON A4S 114/2002 13:36 1 2.45E+02 60 SCL Shielded 2.45E+02 22 CON A4U 11412002 13:38 1 2.71 E+02 60 SCL Unshielded B 2.71E+02 23 CON ASS 11412002 13:58 1 2.00E+02 60 SCL Shielded 2.OOE+02-24 CON ASU 114/2002 14:00 1 2.82E+02 60 SCL Unshielded B 2.82E+02 25 CON ASS 114/2002 14:03 1 1.U4E+02 60 SCL Shielded 1.84E+02 -_ _

26 CON A6U 114/2002 14:05 1 3.10E+02 60 SCL Unshielded 3.10E+02 27 CON A7S 114/2002 14:09 1 1.98E+02 60 SCL Shielded 1.98E+02 -_

28 CON A7U 114/2002 14:10 1 3.15E+02 60 SCL Unshielded B 3.15E+02 39 CON A8S 11412002 14:19 1 2.34E+02 60 SCL Shielded 2.34E+02 _ _ -

30 CON A8S 114/2002 14522 1 2.31E+02 60 SCL Shielded B 2.31 E+02 -

38 CON A8U 114/2002 14:24 1 2.88E+02 60 SCL Unshielded 2.88E+02 32 CON A9S 114/2002 14:31 1 2.65E+02 60 SCL Shielded B 2.65E+02 __ Y_:_:,

33 CON A9U 114/2002 14:33 1 2.89E+02 60 SCL Unshielded 2.89E+02 34 CON A1OS 114/2002 14:42 1 2.46E+02 60 SCL Shielded _ 2.46E+02 -_-_.- _-

35 CON A1OU 1/4/2002 14:43 1 3.16E+02 60 SCL Ushielded 3.16E+02 36 CON A11S 1/412002 15:10 1 139.E+02 60 SCL Shielded B =.95E+02 _ _

37 CON AllU 114/2002 15:12 1 2.94E+02 60 SCL UShielded 2.94E+02 38 CON A12S 1/412002 15:13 1 2.21E+02 60 SCL Shielded B 2.21E+02 . _Y_ __-

39 CON A12U 114/2002 15:14 1 2.U4E+02 60 SCL Unshielded B 2.84E+02 40 CON A13S 1/42002 15:23 1 1.74E+02 60 SCL Shielded 1.74E+02 . _:: ___

49 CON A11U 1/4/2002 15:24 1 2.S4E+02 60 SCL_ Unshielded B 2.94E+02 42 CON A14S 114/2002 15:25 1 1.96E+02 60 SCL Shielded 1.96E+02 -_ _

43 CON A14U 114/2002 15:26 1 3.33E+02 60 SCL Unshielded B 3.33E+02 44 CON A15S 1/4/2002 15:28 1 2.16E+02 60 SCL Shielded 2.16E+02 ;_-_v ____

45 CON A15U 114/2002 15:29 1 3.45E+02 60 SCL Unshielded _ 3.45E+02 46 CON A16S 11412002 15:30 1 1.83E+02 60 SCL Shielded 1.83E+02 _ -

47 CON A16U 114/2002 15:31 1 3.13E+02 60 SCL Unshielded B 3.13E+02 48 CON A17S 11412002 15:33 1 1.82E+02 60 SCL Shielded 1.82E+02 -_._;_._

49 CON A17U 1/412002 15:34 1 3.22E+02 60 SCL Unshielded B 3.22E+02 58 CON A18S 1/4/2002 15:35 1 1.84E+02 60 SCL Shielded 1.84E+02 _ _-

51 CON A18U 11412002 15:36 1 3.24E+02 60 SCL Unshielded B 3.24E+02 52 CON A19S 11412002 15:37 1 1.91E+02 60 SCL Shielded 1.91 E+02 i___ .-

53 CON A19U 114/2002 15:39 1 3.07E+02 60 SCL Unshielded B 3.07E+02 1.94E+02 E+0 55 CON A20U 11412002 15:41 1 3.33E+02 60 SCL Unshielded _ 3.33E+02 56 CON A215 114/2002 15:57 1 2.23E+02 60 SCL Shielded 2.23E+02 - -:- i 57 CON A21U 1/4/2002 15:58 1 2.92E+02 60 SCL Unshielded _ s__-_-_._ 2.92E+02 62 58 A203 CON A22S 1/4/2002 1/412002 16:404 15:59 1 1.987E+02 1.72E+02 60 SC!.

SCL Shielded _ 1.72E+02 - .,i.,.::

59 CON A22U 114/2002 16:00 1 2.80E+02 60 SCL Unshielded B ..  :. 2.80E+02 60 CON A23S 114/2002 16:01 1 1.94E+02 60 SCL Shielded B 1.94E+02 61 CON A23U 11412002 16:02 1 3.29E+02 60 SCL Unshielded f 3.29E+02 62 CON A248 1/4/2002 16:04 1 1.87E+02 60 SCL Shielded 1.87E+02 ,_-_ __

63 CON A24U 1/412002 16:05 1 3.48E+02 60 SCL Unshielded f -. 3.48E+02 64 CON A25S 1/4/2002 16:06 1 2.07E+02 60 SCL Shielded B 2.07E+02 ;_,:__

65 CON A25U 1/4/2002 16:07 1 3.72E+02 60 SCL Unshielded B 3.72E+02 66 CON A26S 11412002 16:09 1 2.09E+02 60 SCL Shielded 2.09E+02 -_:____

67 CON A26U 114/2002 16:10 1 3.26E+02 60 SCL Unshielded f 326E+02 68 CON A27S 1/4/2002 16:11 1 2.07E+02 60 SCL Shielded B 2.07E+02 69 CON A27U 1141202 16:12 1 3.30E+02 60 SCIL Unshielded B 3.30E+02 70 CON A28S 11412002 16:14 1 2.30E+02 60 SCL Shbieded B 2.30E+02 71 CON A28U 11412002 16:15 1 3.06E+02 60 SCIL Unshielded _ ._ - _ 3.06E+02 72 CON A29S 114/2002 16:20 1 2.13E+02 60 SCL Shielded Bq 2.13E+02 73 CON A29U 11412002 16:21 1 2.58E+02 so SCL Unshielded B3 2.58E+02 74 CON A30S 114t200 16:24 1 2.33E+02 60 SCL Shbieded B0 2.33E+02  :

75 CON A30U 114/2002 16:25 1 2.89E+02 60 SCL Unshielded B - 2.89E+02 76 CON A31S 114/2002 16:28 1 1.84E+02 60 SCL Shielded I1.84E+02 -___.-

77 CON A31U 114/202 16:29 1 2.63E+02 60 SCL Unshielded B - 2.63E+02

- Source Check 114t2002 17 27 1 1.70E+05 60 SCL -B Minimum -- 1.72E402 I2.22E+02 Maximum--- 2.781E+02 I3.88E402 Mean v~ 2.11E*02 3.06E+02 Slama--: 2.69E401 I3.45E+01 alroco-cst$n'r I)-/