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Revised Final Status Survey (FSS) Report - Phase 2, Release Record - Auxiliary Building Penetrations Survey Unit 05120
	ML19295G831
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Site:	Zion File:ZionSolutions icon.png
Issue date:	09/01/2019
From:	Massengill R; ZionSolutions
To:	; Office of Nuclear Material Safety and Safeguards
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ZION STATION RESTORATION PROJECT FINAL STATUS SURVEY RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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PREPARED BY / DATE:

2019-09-01 Robert Massengill, Radiological Engineer REVIEWED BY / DATE:

2019-09-01 Robert Decker, Radiological Engineer APPROVED BY / DATE:

2019-09-01 David Wojtkowiak, C/LT Manager

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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TABLE OF CONTENTS

1.

EXECUTIVE

SUMMARY

..................................................................................................... 6

2.

SURVEY UNIT DESCRIPTION........................................................................................... 7

3.

CLASSIFICATION BASIS.................................................................................................... 9

4.

DATA QUALITY OBJECTIVES (DQO)........................................................................... 10

5.

SURVEY DESIGN................................................................................................................ 14

6.

SURVEY IMPLEMENTATION......................................................................................... 18

7.

SURVEY RESULTS............................................................................................................. 20

8.

QUALITY CONTROL......................................................................................................... 24

9.

INVESTIGATIONS AND RESULTS................................................................................. 24

10. REMEDIATION AND RESULTS....................................................................................... 24

11. CHANGES FROM THE FINAL STATUS SURVEY PLAN........................................... 24

12. DATA QUALITY ASSESSMENT (DQA).......................................................................... 24

13. ANOMALIES........................................................................................................................ 25

14. CONCLUSION...................................................................................................................... 25

15. REFERENCES...................................................................................................................... 26

16. ATTACHMENTS.................................................................................................................. 27 ATTACHMENT 1................................................................................................................. 28 ATTACHMENT 2................................................................................................................. 30 ATTACHMENT 3................................................................................................................. 44 ATTACHMENT 4................................................................................................................. 47 ATTACHMENT 5................................................................................................................. 49 ATTACHMENT 6................................................................................................................. 51

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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LIST OF TABLES Table 1 - Dose Significant Radionuclides and Mixture................................................................ 11 Table 2 - Base Case DCGLs for Penetrations (BcDCGLPN) from LTP Chapter 5, Table 5-13... 13 Table 3 - Auxiliary Building Operational DCGLs for Penetrations (OpDCGLPN) from LTP Chapter 5, Table 5-14.................................................................................................... 13 Table 4 - Auxiliary Building Surrogate Ratios............................................................................. 15 Table 5 - Survey Unit 05120 FSS Instrumentation and Action Levels........................................ 16 Table 6 - Investigation Levels...................................................................................................... 17 Table 7 - Systematic Static Locations for Hand-Held Survey...................................................... 18 Table 8 - Auxiliary Building Penetrations Summary................................................................... 22 Table 9 - Auxiliary Building Penetrations FSS Statistics Summary using Auxiliary Building BcDCGLPN..................................................................................................................... 23

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LIST OF ACRONYMS AND ABBREVIATIONS ALARA As Low As Reasonably Achievable AMCG Average Member of the Critical Group BFM Basement Fill Model DQA Data Quality Assessment DQO Data Quality Objective DCGL Derived Concentration Guideline Level EMC Elevated Measurement Comparison FOV Field-of-View FSS Final Status Survey IC Insignificant Contributor ID Internal Diameter LTP License Termination Plan MARSSIM Multi-Agency Radiation Survey and Site Investigation Manual MDC Minimum Detectable Concentration NaI Sodium Iodide QAPP Quality Assurance Project Plan OpDCGL Operational Derived Concentration Guideline Level QC Quality Control RE Radiological Engineer ROC Radionuclides of Concern SOF Sum-of-Fraction TSD Technical Support Document ZNPS Zion Nuclear Power Station ZSRP Zion Station Restoration Project

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1.

EXECUTIVE

SUMMARY

This Final Status Survey (FSS) Release Record for survey unit 05120, Auxiliary Building Penetrations, has been generated for the Zion Station Restoration Project (ZSRP) in accordance with ZionSolutions procedure ZS-LT-300-001-005, Final Status Survey Data Reporting (Reference 1) and satisfies the requirements of Section 5.11 of the Zion Station Restoration Project License Termination Plan (LTP) (Reference 2).

Two (2) Final Status Survey (FSS) sample plans (S1-05120A-F #1 and S1-05120A-F #2) were developed to perform this work in accordance with ZionSolutions procedure ZS-LT-300-001-001, Final Status Survey Package Development (Reference 3), the ZSRP LTP, and with guidance from NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (Reference 4).

Final Status Survey was performed to demonstrate that the concentrations of residual radioactivity on the interior surfaces of the penetrations were equal to or below site-specific Derived Concentration Guideline Levels (DCGL) corresponding to the dose criterion in 10 CFR 20.1402. Initially, the penetrations were segregated and classified in accordance with the type of system and system use. However, in a conservative measure to ensure that all accessible surfaces within each end-state penetration would be subjected to FSS, the classification of all penetrations was changed to Class 1.

Two (2) different survey approaches were used for FSS depending on the diameter, length and access to the penetrations. FSS measurements acquired under FSS sample plan #1, which was applicable to penetrations with an internal diameter (ID) less than 12 inches, consisted of a static measurement taken at 1-foot intervals inside the penetration using a sodium iodide (NaI), conservatively assuming a Field-of-View (FOV) of 1-foot for each measurement and thus providing 100% areal coverage of the accessible internal surfaces of the penetration.

FSS measurements acquired under FSS sample plan #2, which was applicable to penetrations with an ID greater than 12 inches, consisted of a 100% scan with a hand-held beta-gamma detector of the interior surface area of the penetration and at least one (1) 1-minute static gross beta-gamma measurement at a systematic location based on a triangular grid and a 1-minute static measurement at the location of the highest observed scan result in each penetration.

For the FSS of the Auxiliary Building Penetrations, sixty-six (66) measurements were obtained. LTP Chapter 6, section 6.4.5 states, The dose from penetrations is summed with the dose from the wall and floor surfaces of both basements that the penetration interface. Containment DCGLs are more limiting than the Auxiliary Building DCGLs.

Consequently, the penetrations identified as interfacing between the Auxiliary Building

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and the Unit 1 and Unit 2 Containments were addressed in the Release Records for Unit 1 and Unit 2 Containment Penetrations. In order to comply with the requirements of LTP Chapter 6, section 6.4.5, a dose of 1.468 mrem/yr will be added to the Auxiliary Building basement survey unit from penetrations that interfaced between the Auxiliary Building and Unit 1 Containment and a dose of 0.206 mrem/yr will be added to the Auxiliary Building basement survey unit from penetrations that interfaced between the Auxiliary Building and Unit 2 Containment. The Auxiliary Building penetrations addressed in this Release Record interfaced with the Turbine Building (via the G wall and Steam Tunnels). Consequently, the FSS design for penetrations that interfaced between the Auxiliary Building and the Turbine Building employed the DCGLs for the Auxiliary Building penetrations, which were the most limiting. However, the mean concentration for each Radionuclide-of-Concern (ROC) was also compared against the Base Case Penetration DCGLs (BcDCGLPN) for the Turbine Building as well.

No single measurement taken in any penetration exceeded an Operational Sum of Fraction (OpSOF) of one (1) when compared against the Operational DCGLs (OpDCGLPN) for Auxiliary Building Penetrations. When compared against the BcDCGLPN for the Auxiliary Building, the FSS results produced a mean Base Case SOF (BcSOF) for the survey unit of 0.002, which equates to a mean dose of 0.053 mrem/yr.

No penetration exceeded the Auxiliary Building OpDCGLPN or BcDCGLPN. However, in accordance with LTP Chapter 5 section 5.5.5, two (2) of the penetrations required grouting as they had measurements with activity greater than the Turbine Building OpDCGL for surfaces. Grouting of the two (2) penetrations was performed prior to backfill and there was no dose reduction attributed to the survey unit because of grouting.

2.

SURVEY UNIT DESCRIPTION In accordance with the definition of penetrations specified in LTP Chapter 5, section 5.5.5, The end state will include embedded piping and penetrations. An embedded pipe is defined as a pipe that runs vertically through a concrete wall or horizontally through a concrete floor and is contained within a given building. A penetration is defined as a pipe (or remaining pipe sleeve, if the pipe is removed, or concrete, if the pipe and pipe sleeve is removed) that runs through a concrete wall and/or floor, between two buildings, and is open at the wall or floor surface of each building. A penetration could also be a pipe that runs through a concrete wall and/or floor and opens to a building on one end and the outside ground on the other end.

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A summary of the original End State lengths and surface areas for the Auxiliary Building Penetrations as depicted in ZionSolutions Technical Support Document (TSD)14-016, Description of Embedded Piping, Penetrations, and Buried Pipe to Remain in Zion End State (Reference 5), Attachment F. Locations are shown in Attachment 1 of this Release Record.

The Auxiliary Building penetrations survey unit consists of one hundred five (105) penetrations that access the Auxiliary Building between the 542 foot, 560 foot and the 579 foot elevations. However, seventy-nine (79) of the 105 penetrations are identified as being both an Auxiliary Building and Containment Building penetration. Since the Containment DCGLs are more limiting than the Auxiliary Building DCGLs, the penetrations identified as being both Auxiliary and Containment were addressed in the Release Records for Unit 1 and Unit 2 Containment Penetrations.

The remaining twenty-six (26) penetrations that access the Auxiliary Building between the 542, 560 and the 579 foot elevations, but do not access the Containments, are A001-A025, and A034. These penetrations interface between the Auxiliary Building and the Turbine Building primarily through the G wall and through the north and south walls into the Unit 1 and Unit 2 Steam Tunnels.

In accordance with LTP Chapter 5, section 5.5.5, penetration survey units have total surface areas that are less than the area of the wall/floor surface survey unit that the penetrations interface. To eliminate the potential for activity levels in penetrations that could lead to releases greater than the adjacent basement walls and floors, the following remediation and grouting action levels were applied to measurements of surface activity in penetrations.

If maximum activity exceeded the BcDCGLPN from LTP Chapter 5, Table 5-13 (BcSOF >1), then remediation was performed.

If the maximum activity in a penetration exceeded the most limiting OpDCGLB from LTP Chapter 5, Table 5-4 of the two basements where a penetrations interface (OpSOF>1), but is below the BcDCGLPN from LTP Chapter 5, Table 5-13, then the penetration was remediated or grouted.

If a penetration was remediated and the maximum activity continued to exceed the most limiting OpDCGLB from LTP Chapter 5, Table 5-4 of the two basements where a penetrations interface (OpSOF>1), but was less than the OpDCGLPN (LTP Chapter 5, Table 5-14), then the penetration was grouted.

If the maximum activity was below the surface OpDCGLB from LTP Chapter 5, Table 5-4, then grouting of the penetration was not required.

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3.

CLASSIFICATION BASIS Survey unit 05120 was classified in accordance with ZionSolutions procedure ZS-LT-300-001-002, Survey Unit Classification (Reference 6).

The Auxiliary Building Penetrations were initially classified as Class 1, Class 2, or Class 3 based on historical assessment, exposure to radioactive materials and system use. As a conservative measure, the classifications of all Auxiliary Building Penetrations were changed to Class 1. Consequently, sufficient measurements were taken in all Auxiliary Building Penetrations to ensure 100% areal coverage of all accessible internal surfaces within the penetrations.

The Auxiliary Building housed numerous systems containing radioactively contaminated support systems. System leakage and maintenance activities over the operating life of the reactor resulted in the radiological contamination of most of the interior surfaces of the structures. Based on the building design basis and the operating history, all internal survey units in Auxiliary Building were assigned an initial classification of Class 1 in accordance with the Zion Station Historical Site Assessment (HSA) (Reference 7).

The Auxiliary Building penetrations housed numerous systems including the following:

Service and primary water,

Feed and demineralizer water,

Fire protection,

Vent and drain,

Secondary sample,

Waste disposal,

Chemical addition,

Vacuum control, and

Condensate.

The location of the penetrations, their function, and the operational history of the Auxiliary Building to support the initial classifications are described in TSD 14-016.

In accordance with ZionSolutions TSD 14-013, Zion Auxiliary Building End State Estimated Concrete Volumes, Surface Areas, and Source Terms (Reference 8), there were seventeen (17) concrete core samples from the floors and three (3) cores from the walls that were obtained for analysis. The on-site gamma spectroscopy results for the sectioned cores from the 542 foot elevation initial characterization may be found in TSD 14-013. All radioactive systems and components were still located inside the building, consequently ambient radiation dose rates inside the Auxiliary Building prohibited the

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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direct assessment of penetrations or system interior surfaces by scanning or direct measurement.

As part of the survey unit turnover process, a Radiological Engineer (RE) performed the visual inspection and walk-down of the survey unit on March 27, 2018. The purpose of the walk-down was to assess the physical condition of the survey unit, evaluate access points and travel paths and identify potentially hazardous conditions and determine if the survey unit was acceptable for performing FSS.

The Auxiliary Building Penetrations were initially classified as Class 1, Class 2, or Class 3, based on historical assessment, exposure to radioactive materials and system use.

Based upon completion of the Survey Unit Classification Basis for final classification, which included a review of the historical information, the results of the Characterization Survey data and completion of a final Survey Unit Classification Worksheet, the correct final classification of penetrations within the Auxiliary Building were validated. As a conservative measure, the classifications of all Auxiliary Building Penetrations were changed to Class 1. Consequently, sufficient measurements were taken in all Auxiliary Building Penetrations to ensure 100% areal coverage of all accessible internal surfaces within the penetrations.

4.

DATA QUALITY OBJECTIVES (DQO)

Final Status Survey planning and design hinges on coherence with the DQO process to ensure, through compliance with explicitly defined inputs and boundaries, that the primary objective of the survey is satisfied. The DQO process is described in the ZSRP LTP Chapter 5, section 5.6.2 in accordance with MARSSIM. The appropriate design for a given survey was developed using the DQO process as outlined in Appendix D of MARSSIM.

The DQO process incorporated hypothesis testing and probabilistic sampling distributions to control decision errors during data analysis. Hypothesis testing is a process based on the scientific method that compares a baseline condition to an alternate condition. The baseline condition is technically known as the null hypothesis.

Hypothesis testing rests on the premise that the null hypothesis is true and that sufficient evidence must be provided for rejection. In designing the survey plan, the underlying assumption, or null hypothesis was that residual activity in the survey unit exceeded the release criteria. Rejection of the null hypothesis would indicate that residual activity within the survey unit does not exceed the release criteria. Therefore, the survey unit would satisfy the primary objective of the FSS sample plan.

The primary objective of the FSS sample plan is to demonstrate that the level of residual radioactivity in the penetrations that comprised survey unit 05120 did not exceed the

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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release criteria specified in the LTP and that the potential dose from residual radioactivity is As Low As Reasonably Achievable (ALARA).

ZionSolutions TSD 11-001, Technical Support Document for Potential Radionuclides of Concern During the Decommissioning of the Zion Station (Reference 10) established the basis for an initial suite of potential ROC for the decommissioning of the Zion Nuclear Power Station (ZNPS). LTP Chapter 6, section 6.5.2 discusses the process used to derive the ROC for the decommissioning of ZNPS, including the elimination of insignificant dose contributors (IC) from the initial suite. Table 1 presents the ROC for the Auxiliary Building basement structural surfaces and the normalized fractions based on the radionuclide mixture.

Table 1 - Dose Significant Radionuclides and Mixture Radionuclide

% of Total Activity (normalized)(1)

Co-60 0.92 Ni-63 23.71 Sr-90 0.05 Cs-134 0.01 Cs-137 75.32 (1) Based on maximum percent of total activity from Table 20 of TSD 14-019, normalized to one for the dose significant radionuclides.

A fundamental precursor to survey design is to establish a relationship between the release criteria and some measurable quantity. This is done through the development of DCGLs. The DCGLs represent average levels of radioactivity above background levels and are presented in terms of surface or mass activity concentrations. Chapter 6 of the LTP describes in detail the modeling used to develop the DCGLs for penetrations.

The End State Basements are comprised of steel and/or concrete structures which will be covered by at least three feet of clean soil and physically altered to a condition which would not realistically allow the remaining structures, if excavated, to be occupied. The exposure pathways in the Basement Fill Model (BFM) are associated with residual radioactivity in floors and walls that is released through leaching into water contained in the interstitial spaces of the fill material. The BFM assumes that the inventory of residual radioactivity in a given building is released either instantly or over time by diffusion, depending on whether the activity is surficial or volumetric, respectively. The activity released into the fill water will adsorb into the clean fill, as a function of the radionuclide-specific distribution coefficients, resulting in equilibrium concentrations between the fill and the water. Consequently, the only potential exposure pathways after backfill,

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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assuming the as-left geometry, are associated with the residual radioactivity in the water contained in the fill.

The final outputs of the BFM are the Penetration DCGLs, in units of pCi/m2, which are calculated using the BFM Groundwater and BFM Drilling Spoils Dose Factors (LTP Chapter 6, Tables 6-24 and 6-25), LTP Equation 6-10 and the ratios in LTP Table 6-51.

The BcDCGLPN are radionuclide-specific concentrations that represent the 10 CFR 20.1402 dose criterion of 25 mrem/yr and are calculated for each ROC and each backfilled basement. The unity rule is applied when there is more than one ROC. The measurement results for each singular ROC present in the mixture are compared against their respective DCGL to derive a dose fraction.

The BcDCGLPN for the unrestricted release of the Auxiliary Building penetrations are provided in Table 2. The IC dose percentage of 5% was used to adjust the Auxiliary Building Basement DCGLPN to account for the dose from the eliminated IC radionuclides.

Each radionuclide-specific BcDCGLPN is equivalent to the level of residual radioactivity (above background levels) that could, when considered independently, result in a Total Effective Dose Equivalent (TEDE) of 25 mrem/yr to an Average Member of the Critical Group (AMCG). To ensure that the summation of dose from each source term is 25 mrem/yr or less after all FSS is completed, the BcDCGLPN are reduced based on an expected, or a priori, fraction of the 25 mrem/yr dose limit from each source term. The reduced DCGLPN, or OpDCGLPN can be related to the BcDCGLPN as an expected fraction of dose based on an a priori assessment of what the expected dose should be based on the results of site characterization, process knowledge and the extent of planned remediation. The OpDCGLPN is then used as the DCGL for the FSS design of the survey unit (calculation of surrogate DCGLs, investigations levels, etc.). Details of the OpDCGLPN derived for each dose component and the basis for the applied a priori dose fractions are provided in ZionSolutions TSD 17-004, Operational Derived Concentration Guideline Levels for Final Status Survey (Reference 11).

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Table 2 - Base Case DCGLs for Penetrations (BcDCGLPN) from LTP Chapter 5, Table 5-13 Radionuclide Auxiliary Building BcDCGLPN (pCi/m2)

Co-60 8.82E+07 Ni-63 6.79E+10 Sr-90 2.41E+07 Cs-134 3.28E+08 Cs-137 6.17E+08 The OpDCGLPN for the unrestricted release of the Auxiliary Basement penetrations are provided in Table 3.

Table 3 - Auxiliary Building Operational DCGLs for Penetrations (OpDCGLPN) from LTP Chapter 5, Table 5-14 Radionuclide Operational DCGL (pCi/m2)

Co-60 6.95E+06 Ni-63 5.35E+09 Sr-90 1.90E+06 Cs-134 2.58E+07 Cs-137 4.86E+07 Instrument DQOs included a verification of the ability of the survey instrument to detect the radiation(s) of interest relative to the OpDCGLPN. Survey instrument response checks were required prior to issuance and after the instrument had been used. Control and accountability of survey instruments was required to assure the quality and prevent the loss of data. The minimum acceptable minimum detectable concentration (MDC) for measurements obtained using field instruments was 50 percent of the applicable OpDCGLPN.

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5.

SURVEY DESIGN The level of effort associated with planning a survey is based on the complexity of the survey and nature of the hazards. Guidance for preparing FSS plans is provided in procedure ZS-LT-300-001-001 Final Status Survey Package Development. The FSS plans for the survey of penetrations employed sample designs that combined hand-held scanning with static measurements and pipe detector survey methodologies.

The two (2) FSS sample plans for survey unit 05120, Auxiliary Building Penetrations includes FSS design and FSS results for the Auxiliary Building penetrations on the 542 foot, 560 foot and the 572 foot elevations. The survey method for large diameter penetrations (>12) differs from smaller penetrations due to measurement sensitivity (i.e.,

MDCs) differences in the two size regimes. The larger penetrations were surveyed using a similar approach to traditional building surface surveys, whereas the smaller penetrations were surveyed with a single detector advanced through the length in 1-foot increments and centrally positioned. Sample plan #S1-05120A-F #1 addressed the survey of penetrations smaller than 12 inches in diameter (A002, A003, A005, A007-A013, A015, A017 and A019-A023) and sample plan #S1-05120A-F #2 addressed that survey of penetrations with a diameter greater than or equal to 12 inches in diameter (A001, A004, A014, A024 and A025).

Penetrations and buried pipe associated with the west wall of the Auxiliary Building (Unit 1 and Unit 2 Hot Pipe Chases at the 570 foot elevation and buried pipe associated with the SFP) have been physically removed and disposed of as radioactive waste. The penetrations that were removed in its entirety were A006, A016, A018, A029, A034, A037, A038, A039, A040, A041, A042, A043, A044, A046, A047, A048, A049, A050, A052, A053, A054, A055, A056, A057, A058, A059, A060, A061, A063, A064, A065, and A066.

There are twenty-two (22) penetrations that remain in Auxiliary Building that were not attributed to the Containments. The remaining penetrations are located primarily on the G Wall between the Auxiliary Building and the Turbine Building.

FSS of the remaining twenty-two (22) penetrations consisted of sixty-six (66) one-minute static measurements, either using a NaI detector or hand-held detector taken at 1-foot intervals throughout the length of the penetrations, providing 100% areal coverage of the pipe interior surface.

Section 5.1 of LTP Chapter 5 states that Co-60, Ni-63, Sr-90, Cs-134, and Cs-137 are the ROC. During FSS, concentrations for Hard-to-Detect (HTD) ROC Ni-63, and Sr-90 are inferred using a surrogate approach. Cs-137 is the principle surrogate radionuclide for Sr-90, and Co-60 is the principle surrogate radionuclide for Ni-63. The mean, maximum

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

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and 95% Upper Confidence Level (UCL) of the surrogate ratios for concrete core samples taken in the Auxiliary Building basements were calculated in ZionSolutions TSD 14-019, Radionuclides of Concern for Soil and Basement Fill Model Source Terms (Reference 12) and are presented in Table 4 (reproduced from LTP Chapter 5, Table 5-12). The maximum ratios were used in the surrogate calculations during FSS.

Table 4 - Auxiliary Building Surrogate Ratios Ratios Auxiliary Building Mean Max 95%UCL Ni-63/Co-60 44.143 180.450 154.632 Sr-90/Cs-137 0.001 0.002 0.002 For the FSS of survey unit 05120, the surrogate OpDCGLPN for Co-60 and Cs-137 were computed based on the maximum ratios from Table 4.

The equation for calculating a surrogate DCGL is as follows:

Equation 1

=

1

+

2 2+

3 3+

Where:

DCGLSur

= Surrogate radionuclide DCGL DCGL2,3n = DCGL for radionuclides to be represented by the surrogate Rn

= Ratio of concentration (or nuclide mixture fraction) of radionuclide n to surrogate radionuclide Using the OpDCGLPN presented in Table 3 and the maximum ratios from Table 4, the following surrogate calculations were performed:

Equation 2 (137) =

1

1 4.8607(137)+

0.002 1.9006(90)

= 4.6207 /2 The surrogate OpDCGLPN that was used for Cs-137 in this survey unit for direct comparison of sample results to demonstrate compliance is 4.62E+07 pCi/m2.

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Equation 3 (60) =

1

1 6.9506(60)+

180.45 5.3509(63)

= 5.6306 /2 The surrogate OpDCGLPN that was used for Co-60 in this survey unit for direct comparison of sample results to demonstrate compliance is 5.63E+06 pCi/m2.

The most limiting DCGL was determined to be Co-60 (5.63E+06 pCi/m2) or 1.25E+05 dpm/100 cm2. This value was used as the action level for hand-held scan and static measurements and pipe detector static measurements in this survey unit. Action levels in counts per minute (cpm) for pipe detector surveys were calculated using the limiting Co-60 surrogate OpDCGLPN, the effective area of detection for the various diameter penetrations, and the associated efficiency for each size penetration. The action levels in cpm for hand-held surveys were calculated using the limiting Co-60 OpDCGLPN and the efficiency of the instrument/detector combination. Table 5 provides a summary of the instrumentation and action levels used for the FSS of the penetrations.

Table 5 - Survey Unit 05120 FSS Instrumentation and Action Levels Survey Type Instrument Detector Penetration Diameter (in)

Efficiency Action Level (cpm)

Hand-held Ludlum 2360 Ludlum 43-93 14-50 0.117(1) 14,600 Pipe Detector Ludlum 2350-1 Ludlum 44-157 6

0.012(2) 32,695 8

0.009(2) 32,751 Ludlum 44-162 10 0.018(2) 81,625 12 0.016(2) 87,186 23 0.0142(2) 148,131 (1) Efficiency determined using Tc-99 source. Derived instrument efficiency of 0.144 x source efficiency of 0.81 (NUREG-1507, Table 5.4) = 0.117 (total efficiency)

(2) Efficiency empirically derived using conformable Cs-137 source in various ID pipe jigs For this Class 1 penetration survey unit, the Investigation Levels for area scanning and static measurement results are those levels specified in LTP Chapter 5, Table 5-25 and are reproduced below in Table 6.

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Table 6 - Investigation Levels Classification Scan Investigation Levels Direct Investigation Levels Class 1

>Operational DCGL or

>MDCscan if MDCscan is greater than Operational DCGL

>Operational DCGL Two (2) survey methodologies were utilized for the FSS of the Auxiliary Building Penetrations, pipe detector survey or hand-held survey. This was due to the varying diameters and lengths of the penetrations. The survey designs for the FSS of Survey Unit 05120 using the different methodologies are detailed below.

The first sample plan required that measurements be collected with a pipe detector.

Penetrations included in this plan were twelve (12) inches in diameter or smaller.

Seventeen (17) of the twenty-two (22) total penetrations were included in the survey design for pipe detectors. Refer to Table 5 for the FSS instrumentation summary. The total length of the penetrations under the pipe detector methodology is 51 ft. (15.54 m) with a total interior surface area of 6.98 m2. As a Class 1 survey unit, the survey design required a 100% areal coverage. For the survey of pipe or penetration internal surfaces that cannot be practically surveyed using a hand-held detector methodology, areal coverage is achieved by the area of detection for each static measurement taken.

Scanning, in the traditional context, is not applicable to this type of survey. With a 1-foot area of detection, a 1-minute static measurement at 1-foot increments throughout the penetration length was sufficient to provide 100% areal coverage. For 51 feet of penetrations in the survey unit, at least fifty-one (51) measurements were required to satisfy the 100% coverage requirement.

Sample plan #2 required that measurements be collected with a hand-held detector.

Penetrations included in sample plan #2 were larger than twelve (12) inches in diameter.

Five (5) of the twenty-two (22) total penetrations were included in the survey design for hand-held detectors. Refer to Table 5 for the FSS instrumentation summary. The total length of the penetrations under the hand-held methodology is 15 ft. (4.572 m) with a total interior surface area of 8.90 m2. For the survey of these larger diameter pipes, the survey design required 100% scan of the accessible interior surfaces of the penetration.

In addition, a minimum of one 1-minute static measurement was acquired in each penetration at systematic locations based on a triangular grid, and at least one 1-minute static measurement was acquired in each penetration at the location of the highest scan result. Seventeen (17) static measurements (15 systematic and 2 QC) were acquired in the large diameter penetrations with the locations selected as denoted in Table 7 below.

Maps of the penetrations and measurement locations are provided in Attachment 1.

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Table 7 - Systematic Static Locations for Hand-Held Survey Measurement No.

Penetration No.

Inches into Penetration (1) 1 A001 12 2

A001 24 3

A001 36 4

A014 12 5

A014 24 6

A014 36 7

A014 36 8

A004 12 9

A004 24 10 A004 36 11 A024 12 12 A024 24 13 A024 36 14 A025 12 15 A025 24 16 A025 36 17 A025 36 (1) Static measurements were acquired on the bottom of the penetration circumference.

The implementation of quality control measures as referenced by LTP Chapter 5, section 5.9 and ZionSolutions ZS-LT-01, Quality Assurance Project Plan (for Characterization and FSS) (QAPP) (Reference 13) includes the collection of a duplicate measurement on 5% of the measurements taken with the locations selected at random. One (1) measurement out of every twenty (20) was required for QC compliance.

6.

SURVEY IMPLEMENTATION Survey instructions for this FSS were incorporated into and performed in accordance with FSS sample plans #S1-05120AF #1 and #2, which were developed in accordance with ZionSolutions procedure ZS-LT-300-001-001, Final Status Survey Package Development. The FSS unit was inspected and controlled in accordance with

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ZionSolutions procedure ZS-LT-300-001-003, Isolation and Control for Final Status Survey (Reference 14).

Surveys of the Auxiliary Building Penetrations began on March 27, 2018 and concluded on March 28, 2018. The survey design estimated seven (7) working days to implement the FSS in parallel with any required decontamination and inspection activities. In reality, only two (2) working days were necessary to complete this work. Throughout these activities, briefings were conducted on a daily basis to discuss the expectations for job performance and to review the safety aspects of the job.

Visual inspections of the penetrations were performed prior to the start of the survey.

Inspections were performed to ensure that the penetrations were relatively dry and free of debris.

For pipe detector surveys using a NaI detector, a background value was determined for the detector/instrument combination to be used prior to deployment. The background value was obtained at the location where the pre-use response check of the instrument was performed. The background value was primarily used to ensure that the detector had not become cross-contaminated by any previous use. Background was not subtracted from any measurement.

Daily, prior to and following use, each detector was subjected to an Operational Response Check in accordance with procedure ZS-LT-300-001-006, Radiation Surveys of Pipe Interiors Using Sodium/Cesium Iodide Detectors (Reference 15). The Daily Operational Response Check compared the background response to check source ranges established for normal background and detector source response. This check ensured that the detector was working properly.

Once the detector was determined to be fully functional, it was then deployed to the field for insertion into the targeted penetrations. A one-minute static measurement was acquired at each foot traversed into the penetrations. The detector output represented the gamma activity for each one-minute timed measurement in units of gross cpm. The gamma measurement value in units of cpm was then converted to units of dpm using the efficiency factor for the detector applicable to the diameter of the penetration surveyed.

Each measurement assumed a conservative area of detection for the NaI detector of one foot. This assumption is conservative because there is additional instrument response from contamination located in the pipe at distances outside of the area of detection.

Consequently, the total activity from the measurement, in units of dpm, is adjusted for the total effective surface area commensurate with the penetration diameter and the assumed area of detection, resulting in measurement results in units of dpm/100 cm2. Using the appropriate conversion factors, the result is then converted to units of pCi/m2. This

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measurement result represents a commensurate and conservative gamma surface activity for the one foot of pipe surface where the measurement was taken.

For the penetration surveys performed with hand-held detectors, a background value was determined for the detector/instrument combination as the average of five (5) ambient 1-minute static measurements. An Alarm Set Point was developed using the background value plus the Action Level dictated in Table 5.

The entire surface area (100%) of the interior surface area of the designated penetrations were scanned using either the Ludlum 2350-1 paired with a pipe detector or a Ludlum 2360 paired with a Ludlum 43-93 detector operated in the rate-meter mode and using audio response. The probe was positioned as close to the surface as possible and was moved at a scan speed of 2.0 inches per second.

Systematic 1-minute static measurements were acquired at the locations denoted in Table

6. Additionally, 1-minute static measurements were taken at the locations of highest scan result in each penetration. Using the established efficiencies (denoted in Table 5), the static measurement activities in cpm were converted to activities in dpm/100 cm2 and then to pCi/m2 using the appropriate conversion factor.

7.

SURVEY RESULTS After completion of the FSS measurements in the penetrations, the sample plan was reviewed to confirm the completeness of the survey and the survey data was validated in accordance with procedure ZS-LT-300-001-004, Final Status Survey Data Assessment (Reference 16). Data processing included converting measurement data into reporting units, validating instrument applicability and sensitivity, calculating relevant statistical quantities, and verification that all DQO have been met.

For measurements acquired with a NaI detector, the gross output of the measurement is converted to units of dpm by dividing by the efficiency. The effective FOV of the measurement is calculated based upon diameter of the pipe at a length of 1 foot. The result, following unit conversion, is a gross gamma measurement result in units of pCi/m2.

For measurements acquired as a direct static measurement with a hand-held detector, the gross gamma output of the measurement is again converted to units of dpm by dividing by the efficiency. As the detector has an area of 100 cm2, the units for the measurement are actually in units of dpm/100cm2. Again, through unit conversion, units of dpm/100cm2 are converted to units of pCi/m2.

Using the mixture from Table 5-2 of LTP Chapter 5 (reproduced as Table 1 of this Release Record), the gross gamma result from each measurement is multiplied by the

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normalized gamma mixture fractions for C-60, Cs-134 and Cs-137 to derive a radionuclide specific concentration for each gamma ROC. The HTD ROC concentrations for Ni-63 and Sr-90 were then inferred using the maximum surrogate ratios from LTP Chapter 5, Table 5-15 (reproduced as Table 4 of this Release Record).

Each concentration for each measurement is then compared against the OpDCGLPN to produce an OpSOF for each ROC, which were when summed to derive an OpSOF for the measurement.

In accordance with LTP Chapter 5 section 5.5.5, penetration survey units also have total surface areas that are less than the area of the wall/floor surface survey unit that the penetrations interface. To eliminate the potential for activity levels in penetrations that could lead to releases greater than the adjacent basement walls and floors, the results are also compared against the OpDCGL for surfaces from LTP Chapter 5, Table 5-4 of the two building that the penetration interfaces. In the case of the Auxiliary Building penetrations, the OpDCGLB for the Turbine Building are the most limiting. Two (2) of the penetrations required grouting as they had measurements with activity greater than the OpDCGLB for the Turbine Building. Grouting of the two (2) penetrations was performed prior to backfill and there was no dose reduction attributed to the survey unit because of grouting.

Table 8 provides the summary of Auxiliary Building penetrations, a summary of the FSS results, and whether the penetration required grouting. The complete tables containing the measurement results of all Auxiliary Building measurements that were taken are presented in Attachment 2. The measurement data collected passed the Sign Test. The results of the Sign Test are provided in Attachment 3. The statistical summary of the measurement data taken, when compared against the BcDCGLPN for Auxiliary Building penetrations are presented in Table 9.

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Table 8 - Auxiliary Building Penetrations Summary Pen #

Description Diameter Length Area Measurement #

(2)

By Direct Scan Max SOF Requires Grouting (in)

(ft)

(m2)

OpDCGLPN BcDCGLPN OpDCGLB (1)

A001 Service Water 24 3

1.75 52 thru 54 X

0.001 0.001 0.305 No A002 Feedwater 4.5 3

0.33 10 thru 12 0.012 0.003 0.848 No A003 Secondary Sample 2.5 3

0.18 13 thru 15 0.033 0.000 0.021 No A004 Service Water 24 3

1.75 58 thru 60 X

0.001 0.001 0.250 No A005 Feedwater 4.5 3

0.33 31 thru 33 0.010 0.001 0.254 No A007 Aux Vents & Drains 4.5 3

0.33 1

thru 3

0.010 0.001 0.311 No A008 Aux Vents & Drains 4.5 3

0.33 4

thru 6

0.012 0.001 0.262 No A009 Waste Disposal 3.5 3

0.26 7

thru 9

0.010 0.002 0.497 No A010 Service Water 11 3

0.80 49 thru 51 0.020 0.022 7.078 No A011 Waste Disposal 7

3 0.51 19 thru 21 0.279 0.001 0.346 Yes A012 Chemical Feed 3.5 3

0.26 22 thru 24 0.014 0.001 0.421 No A013 Primary Water 4.5 3

0.33 16 thru 18 0.017 0.000 0.020 No A014 Service Water 20 3

1.46 55 thru 57 X

0.001 0.001 0.373 No A015 Waste Disposal 6.5 3

0.47 28 thru 30 0.015 0.002 0.636 No A017 Fire Protection 11 3

0.80 46 thru 48 0.025 0.001 0.256 No A019 Primary Water 3.5 3

0.26 25 thru 27 0.010 0.001 0.296 No A020 Vacuum Control 3.5 3

0.26 34 thru 36 0.012 0.001 0.330 No A021 Demin Water 3.5 3

0.26 37 thru 39 0.013 0.001 0.298 No A022 Line with Flange 4.5 3

0.33 40 thru 42 0.012 0.013 4.181 No A023 Waste Disposal 6.5 3

0.47 43 thru 45 0.165 0.000 0.066 Yes A024 Condensate 18 3

1.31 61 thru 63 X

0.003 0.000 0.018 No A025 Supply Header 36 3

2.63 64 thru 66 X

0.001 0.001 0.305 No (1) Compared against the OpDCGLB for the Turbine Building from LTP Chapter 5, Table 5-4 (2) Measurement numbers correlates to Attachment 2, Penetration Survey Data Assessment Tables

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The SOF for all sixty-six (66) measurements, based on the OpDCGLPN, were less than one (1). The mean OpSOF for Auxiliary Building penetrations was 0.027. The maximum OpSOF for a measurement using OpDCGLPN for penetrations was 0.279. The data collected passed the Sign Test.

Table 9 - Auxiliary Building Penetrations FSS Statistics Summary using Auxiliary Building BcDCGLPN Individual Measurement Metrics Total Number of Systematic Measurements = 66 Number of Quality Control Measurements = 5 Number of Judgmental/Investigational Measurements = 0 Total Number of Measurements = 71 Mean Systematic Measurement OpSOF = 0.027 Max Individual Systematic Measurement OpSOF = 0.279 Number of Systematic Measurements with OpSOF >1 = 0 Nuclide Mean Median Max Min St Dev BcDCGLPN Mean Nuclide BcSOF (pCi/m2)

(pCi/m2)

Co-60 1.37E+04 5.47E+03 1.43E+05 2.71E+02 2.93E+04 8.82E+07 0.000 Ni-63 2.48E+06 9.87E+05 2.59E+07 4.88E+04 5.28E+06 6.79E+10 0.000 Sr-90 2.25E+03 8.95E+02 2.35E+04 4.43E+01 4.79E+03 2.41E+07 0.000 Cs-134 1.49E+02 5.94E+01 1.56E+03 2.94E+00 3.18E+02 3.28E+08 0.000 Cs-137 1.12E+06 4.48E+05 1.17E+07 2.22E+04 2.40E+06 6.17E+08 0.002 The mean BcSOF for Auxiliary Building penetrations (survey unit 05120), when compared against the BcDCGLPN for Auxiliary Building penetrations is 0.002, which equates to a dose of 0.053 mrem/yr.

The SOF for two (2) measurements, when compared against the OpDCGLB for the Turbine Building, were above one (1). In accordance with LTP Chapter 5 section 5.5.5, these two penetrations (A011 and A023) were grouted. No dose reduction was attributed to the survey unit because of grouting.

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8.

QUALITY CONTROL In compliance with ZS-LT-01, replicate measurements were performed on 5% of the survey locations chosen at random. Five (5) replicate measurements were taken, which equates to 7.6% of the total number of measurements and satisfies the requirement.

Using the acceptance criteria specified in section 4.1.2 of ZS-LT-01, there was acceptable agreement between the replicate readings and the original readings. Refer to Attachment 5 for quality control analysis results.

9.

INVESTIGATIONS AND RESULTS No investigations were performed during the performance or analyses of the FSS.

10.

REMEDIATION AND RESULTS No radiological remedial action as described by MARSSIM Section 5.4 was performed in this survey unit prior to or as a result of the FSS.

11.

CHANGES FROM THE FINAL STATUS SURVEY PLAN There were no addendums to the FSS plan.

12.

DATA QUALITY ASSESSMENT (DQA)

The DQO sample design and data were reviewed in accordance with ZionSolutions procedure ZS-LT-300-001-004, Final Status Survey Data Assessment for completeness and consistency. Documentation was complete and legible. Surveys and sample collection were consistent with the DQOs and were sufficient to ensure that the survey unit was properly classified.

The analytical results of all samples were less than an OpSOF of one. Although MARSSIM states that the Sign Test need not be performed in the instance that no measurements surpass the DCGL, the test was conducted to demonstrate coherence to the statistical principles of the DQO process. The Sign Test was performed on the data and compared to the original assumptions of the DQOs. The evaluation of the Sign Test results clearly demonstrates that the survey unit passes the unrestricted release criteria, thus, the null hypothesis is rejected.

The preliminary data review consisted of calculating basic statistical quantities (e.g.,

mean, median, standard deviation). All data was considered valid including negative values, zeros, values reported below the MDC, and values with uncertainties greater than two standard deviations. The mean and median values for each ROC were well below

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the respective OpDCGLPN. Also, a retrospective power curve showed that a sufficient number of samples were collected to achieve the desired power. Therefore, the survey unit meets the unrestricted release criteria with adequate power as required by the DQOs.

The data for Co-60 and Cs-137 is represented graphically through a frequency plot and a quantile plot. All graphical representations are provided in Attachment 6.

13.

ANOMALIES No anomalies were observed during the performance or analyses of the survey.

14.

CONCLUSION Survey Unit 05120 has met the DQOs of the FSS plan. The ALARA criteria as specified in Chapter 4 of the LTP were achieved. The Elevated Measurement Comparison (EMC) is not applicable to structural surfaces.

All identified ROC were used for statistical testing to determine the adequacy of the survey unit for FSS. Evaluation of the data shows that none of the ROC concentration values exceed the OpDCGLPN for the Auxiliary Building or any investigational levels; therefore, in accordance with the LTP Section 5.10, the survey unit meets the release criterion.

The sample data passed the Sign Test. The null hypothesis was rejected. The Retrospective Power Curve showed that adequate power was achieved. The survey unit was properly classified as Class 1.

LTP Chapter 6, section 6.4.5 requires that the dose from a penetration be added to each basement that the penetration interfaces with. The penetrations in the Auxiliary Building interface with both Unit 1 and Unit 2 Containments and with the Turbine Building. the penetrations identified as interfacing between the Auxiliary Building and the Unit 1 and Unit 2 Containments were addressed in the Release Records for Unit 1 and Unit 2 Containment Penetrations. In order to comply with the requirements of LTP Chapter 6, section 6.4.5, a dose of 1.468 mrem/yr will be added to the Auxiliary Building basement survey unit from penetrations that interfaced between the Auxiliary Building and Unit 1 Containment and a dose of 0.206 mrem/yr will be added to the Auxiliary Building basement survey unit from penetrations that interfaced between the Auxiliary Building and Unit 2 Containment. The Auxiliary Building penetrations addressed in this Release Record interfaced with the Turbine Building (via the G wall and Steam Tunnels).

Consequently, a dose value of 0.053 mrem/yr will also be added to the Auxiliary Building basement and the Turbine Building basement.

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The null hypothesis was rejected. Therefore, in accordance with the LTP Section 5.10, survey unit 05120 meets the release criterion and is acceptable for unrestricted release.

15.

REFERENCES

1. ZionSolutions procedure ZS-LT-300-001-005, Final Status Survey Data Reporting

2. Zion Station Restoration Project License Termination Plan

3. ZionSolutions procedure ZS-LT-300-001-001, Final Status Survey Package Development

4. NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual

5. ZionSolutions TSD 14-016, Description of Embedded Piping, Penetrations, and Buried Pipe to Remain in Zion End State

6. ZionSolutions procedure ZS-LT-300-001-002, Survey Unit Classification

7. Zion Station Historical Site Assessment

8. ZionSolutions TSD 14-013, Zion Auxiliary Building End State Estimated Concrete Volumes, Surface Areas, and Source Terms

9. ZionSolutions procedure ZS-LT-300-001-002, Survey Unit Classification

10. ZionSolutions TSD 11-001, Technical Support Document for Potential Radionuclides of Concern During the Decommissioning of the Zion Station

11. ZionSolutions TSD 17-004, Operational Derived Concentration Guideline Levels for Final Status Survey

12. ZionSolutions TSD 14-019, Radionuclides of Concern for Soil and Basement Fill Model Source Terms

13. ZionSolutions ZS-LT-01, Quality Assurance Project Plan (for Characterization and FSS)

14. ZionSolutions procedure ZS-LT-300-001-003, Isolation and Control for Final Status Survey

15. ZionSolutions procedure ZS-LT-300-001-006, Radiation Surveys of Pipe Interiors Using Sodium/Cesium Iodide Detectors

16. ZionSolutions procedure ZS-LT-300-001-004, Final Status Survey Data Assessment

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16.

ATTACHMENTS

- Figures and Maps

- Measurement Data

- Sign Test

- QC Data

- QC Measurement Assessments

- Graphical Presentations

[28]

ATTACHMENT 1 FIGURES AND MAPS

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Figure 1 - Overall Penetration Map

[30]

ATTACHMENT 2 MEASUREMENT DATA

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Auxiliary Building Penetration Summary MEASUREMENT ID Co-60 Ni-63 Sr-90 Cs-134 Cs-137 OpSOF(1)

(pCi/m2)

A007 Position#1 4.84E+03 8.74E+05 7.93E+02 5.27E+01 3.97E+05 0.0094 A007 Position#2 4.96E+03 8.96E+05 8.13E+02 5.40E+01 4.06E+05 0.0097 A007 Position#3 5.15E+03 9.30E+05 8.44E+02 5.60E+01 4.22E+05 0.0100 A008 Position#1 6.29E+03 1.14E+06 1.03E+03 6.84E+01 5.15E+05 0.0123 A008 Position#2 5.76E+03 1.04E+06 9.43E+02 6.26E+01 4.72E+05 0.0112 A008 Position#3 5.70E+03 1.03E+06 9.33E+02 6.20E+01 4.67E+05 0.0111 A009 Position#1 5.30E+03 9.56E+05 8.67E+02 5.76E+01 4.34E+05 0.0103 A009 Position#2 5.17E+03 9.32E+05 8.46E+02 5.61E+01 4.23E+05 0.0101 A009 Position#3 5.28E+03 9.54E+05 8.65E+02 5.74E+01 4.33E+05 0.0103 A002 Position#1 5.21E+03 9.41E+05 8.54E+02 5.67E+01 4.27E+05 0.0102 A002 Position#2 4.92E+03 8.87E+05 8.05E+02 5.34E+01 4.02E+05 0.0096 A002 Position#3 6.19E+03 1.12E+06 1.01E+03 6.72E+01 5.06E+05 0.0121 A003 Position#1 6.82E+03 1.23E+06 1.12E+03 7.41E+01 5.58E+05 0.0133 A003 Position#2 7.39E+03 1.33E+06 1.21E+03 8.03E+01 6.05E+05 0.0144 A003 Position#3 1.72E+04 3.10E+06 2.81E+03 1.87E+02 1.41E+06 0.0335 A013 Position#1 7.93E+03 1.43E+06 1.30E+03 8.62E+01 6.49E+05 0.0155 A013 Position#2 8.30E+03 1.50E+06 1.36E+03 9.02E+01 6.80E+05 0.0162 A013 Position#3 8.53E+03 1.54E+06 1.40E+03 9.27E+01 6.98E+05 0.0166 A011 Position#1 1.25E+05 2.25E+07 2.04E+04 1.35E+03 1.02E+07 0.2427 A011 Position#2 1.43E+05 2.59E+07 2.35E+04 1.56E+03 1.17E+07 0.2794 A011 Position#3 1.21E+05 2.18E+07 1.98E+04 1.31E+03 9.88E+06 0.2352 A012 Position#1 5.44E+03 9.81E+05 8.91E+02 5.91E+01 4.45E+05 0.0106 A012 Position#2 5.50E+03 9.92E+05 9.00E+02 5.98E+01 4.50E+05 0.0107 A012 Position#3 7.01E+03 1.26E+06 1.15E+03 7.62E+01 5.74E+05 0.0137 A019 Position#1 4.75E+03 8.57E+05 7.78E+02 5.16E+01 3.89E+05 0.0093 (1) Compared against the OpDCGLPN for the Auxiliary Building from LTP Chapter 5, Table 5-14

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Auxiliary Building Penetration Summary (continued)

MEASUREMENT ID Co-60 Ni-63 Sr-90 Cs-134 Cs-137 OpSOF(1)

(pCi/m2)

A019 Position#2 4.73E+03 8.53E+05 7.74E+02 5.14E+01 3.87E+05 0.0092 A019 Position#3 5.18E+03 9.34E+05 8.48E+02 5.63E+01 4.24E+05 0.0101 A015 Position#1 6.64E+03 1.20E+06 1.09E+03 7.22E+01 5.44E+05 0.0129 A015 Position#2 6.59E+03 1.19E+06 1.08E+03 7.16E+01 5.40E+05 0.0128 A015 Position#3 7.55E+03 1.36E+06 1.24E+03 8.21E+01 6.18E+05 0.0147 A005 Position#1 4.51E+03 8.14E+05 7.39E+02 4.90E+01 3.69E+05 0.0088 A005 Position#2 4.50E+03 8.12E+05 7.37E+02 4.89E+01 3.68E+05 0.0088 A005 Position#3 5.07E+03 9.15E+05 8.30E+02 5.51E+01 4.15E+05 0.0099 A020 Position#1 5.13E+03 9.26E+05 8.40E+02 5.58E+01 4.20E+05 0.0100 A020 Position#2 5.98E+03 1.08E+06 9.80E+02 6.51E+01 4.90E+05 0.0117 A020 Position#3 5.95E+03 1.07E+06 9.74E+02 6.47E+01 4.87E+05 0.0116 A021 Position#1 6.67E+03 1.20E+06 1.09E+03 7.25E+01 5.46E+05 0.0130 A021 Position#2 5.59E+03 1.01E+06 9.16E+02 6.08E+01 4.58E+05 0.0109 A021 Position#3 5.63E+03 1.02E+06 9.22E+02 6.12E+01 4.61E+05 0.0110 A022 Position#1 4.44E+03 8.01E+05 7.27E+02 4.83E+01 3.64E+05 0.0087 A022 Position#2 4.46E+03 8.06E+05 7.31E+02 4.85E+01 3.66E+05 0.0087 A022 Position#3 6.03E+03 1.09E+06 9.88E+02 6.56E+01 4.94E+05 0.0118 A023 Position#1 6.23E+04 1.12E+07 1.02E+04 6.77E+02 5.10E+06 0.1214 A023 Position#2 8.47E+04 1.53E+07 1.39E+04 9.20E+02 6.93E+06 0.1650 A023 Position#3 6.52E+04 1.18E+07 1.07E+04 7.09E+02 5.34E+06 0.1270 A017 Position#1 9.91E+03 1.79E+06 1.62E+03 1.08E+02 8.11E+05 0.0193 A017 Position#2 1.07E+04 1.93E+06 1.75E+03 1.16E+02 8.74E+05 0.0208 A017 Position#3 1.29E+04 2.32E+06 2.11E+03 1.40E+02 1.05E+06 0.0251 A010 Position#1 8.41E+03 1.52E+06 1.38E+03 9.14E+01 6.89E+05 0.0164 A010 Position#2 8.59E+03 1.55E+06 1.41E+03 9.33E+01 7.03E+05 0.0167 (1) Compared against the OpDCGLPN for the Auxiliary Building from LTP Chapter 5, Table 5-14

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Auxiliary Building Penetration Summary (continued)

MEASUREMENT ID Co-60 Ni-63 Sr-90 Cs-134 Cs-137 OpSOF(1)

(pCi/m2)

A010 Position#3 1.01E+04 1.82E+06 1.65E+03 1.10E+02 8.25E+05 0.0196 A001 Position #1 4.20E+02 7.59E+04 6.88E+01 4.57E+00 3.44E+04 0.0008 A001 Position #2 4.61E+02 8.33E+04 7.56E+01 5.02E+00 3.78E+04 0.0009 A001 Position #3 4.37E+02 7.89E+04 7.16E+01 4.75E+00 3.58E+04 0.0009 A014 Position #1 2.71E+02 4.88E+04 4.43E+01 2.94E+00 2.22E+04 0.0005 A014 Position #2 3.53E+02 6.36E+04 5.78E+01 3.83E+00 2.89E+04 0.0007 A014 Position #3 4.06E+02 7.32E+04 6.65E+01 4.41E+00 3.32E+04 0.0008 A004 Position #1 3.79E+02 6.84E+04 6.21E+01 4.12E+00 3.11E+04 0.0007 A004 Position #2 3.38E+02 6.10E+04 5.54E+01 3.68E+00 2.77E+04 0.0007 A004 Position #3 4.32E+02 7.80E+04 7.08E+01 4.70E+00 3.54E+04 0.0008 A024 Position #1 4.49E+02 8.11E+04 7.36E+01 4.88E+00 3.68E+04 0.0009 A024 Position #2 7.61E+02 1.37E+05 1.25E+02 8.27E+00 6.23E+04 0.0015 A024 Position #3 1.34E+03 2.42E+05 2.20E+02 1.46E+01 1.10E+05 0.0026 A025 Position #1 3.31E+02 5.97E+04 5.42E+01 3.60E+00 2.71E+04 0.0006 A025 Position #2 3.14E+02 5.67E+04 5.14E+01 3.41E+00 2.57E+04 0.0006 A025 Position #3 3.55E+02 6.41E+04 5.81E+01 3.86E+00 2.91E+04 0.0007 (1) Compared against the OpDCGLPN for the Auxiliary Building from LTP Chapter 5, Table 5-14

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[34]

Auxiliary Building Penetration Scan Measurements for Large Diameter Penetrations (>12 inches ID)

Instrument/ID Cal. Due Detector/ID Cal. Due Efficiency Survey Date Penetration Reading (cpm)

Reading (dpm/100cm2)

Reading (pCi/m2) 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A001 174 870 3.48E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A001 191 955 3.82E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A001 181 905 3.62E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A014 112 560 2.24E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A014 146 730 2.92E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A014 168 840 3.36E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A014 QC 145 725 2.90E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A004 157 785 3.14E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A004 140 700 2.80E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A004 179 895 3.58E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A024 186 930 3.72E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A024 315 1575 6.31E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A024 555 2775 1.11E+05 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A025 137 685 2.74E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A025 130 650 2.60E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A025 147 735 2.94E+04 2360/278576 1/27/2019 43-93/PR311187 1/27/2019 0.20 3/28/2018 A025 QC 120 600 2.40E+04

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[35]

Penetration Survey Data Assessment No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 1 A007 Position#1 1

4.02E+05 Co-60 0.0121 4.84E+03 6.95E+06 0.0007 0.0094 8.82E+07 0.0001 0.0007 5.98E+06 0.0008 0.2392 Ni-63 180 8.74E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0047 Sr-90 0.002 7.93E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0121 Cs-134 0.0001 5.27E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.97E+05 4.86E+07 0.0082 6.17E+08 0.0006 1.79E+06 0.2216 2

A007 Position#2 2

4.11E+05 Co-60 0.0121 4.96E+03 6.95E+06 0.0007 0.0097 8.82E+07 0.0001 0.0008 5.98E+06 0.0008 0.2451 Ni-63 180 8.96E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0048 Sr-90 0.002 8.13E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0124 Cs-134 0.0001 5.40E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.06E+05 4.86E+07 0.0084 6.17E+08 0.0007 1.79E+06 0.2270 3

A007 Position#3 3

4.27E+05 Co-60 0.0121 5.15E+03 6.95E+06 0.0007 0.0100 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2545 Ni-63 180 9.30E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0050 Sr-90 0.002 8.44E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0128 Cs-134 0.0001 5.60E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.22E+05 4.86E+07 0.0087 6.17E+08 0.0007 1.79E+06 0.2357 4

A008 Position#1 1

5.22E+05 Co-60 0.0121 6.29E+03 6.95E+06 0.0009 0.0123 8.82E+07 0.0001 0.0010 5.98E+06 0.0011 0.3108 Ni-63 180 1.14E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0061 Sr-90 0.002 1.03E+03 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0157 Cs-134 0.0001 6.84E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 5.15E+05 4.86E+07 0.0106 6.17E+08 0.0008 1.79E+06 0.2878 5

A008 Position#2 2

4.77E+05 Co-60 0.0121 5.76E+03 6.95E+06 0.0008 0.0112 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.2844 Ni-63 180 1.04E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0056 Sr-90 0.002 9.43E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0143 Cs-134 0.0001 6.26E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.72E+05 4.86E+07 0.0097 6.17E+08 0.0008 1.79E+06 0.2634 6

A008 Position#3 3

4.72E+05 Co-60 0.0121 5.70E+03 6.95E+06 0.0008 0.0111 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.2814 Ni-63 180 1.03E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0056 Sr-90 0.002 9.33E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0142 Cs-134 0.0001 6.20E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.67E+05 4.86E+07 0.0096 6.17E+08 0.0008 1.79E+06 0.2607 7

A009 Position#1 1

4.39E+05 Co-60 0.0121 5.30E+03 6.95E+06 0.0008 0.0103 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2615 Ni-63 180 9.56E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0052 Sr-90 0.002 8.67E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0132 Cs-134 0.0001 5.76E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.34E+05 4.86E+07 0.0089 6.17E+08 0.0007 1.79E+06 0.2422 8

A009 Position#2 2

4.28E+05 Co-60 0.0121 5.17E+03 6.95E+06 0.0007 0.0101 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2551 Ni-63 180 9.32E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0050 Sr-90 0.002 8.46E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0129 Cs-134 0.0001 5.61E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.23E+05 4.86E+07 0.0087 6.17E+08 0.0007 1.79E+06 0.2363

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[36]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 9 A009 Position#3 3

4.38E+05 Co-60 0.0121 5.28E+03 6.95E+06 0.0008 0.0103 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2609 Ni-63 180 9.54E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0052 Sr-90 0.002 8.65E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0131 Cs-134 0.0001 5.74E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.33E+05 4.86E+07 0.0089 6.17E+08 0.0007 1.79E+06 0.2417 10 A002 Position#1 1

4.32E+05 Co-60 0.0121 5.21E+03 6.95E+06 0.0008 0.0102 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2574 Ni-63 180 9.41E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0051 Sr-90 0.002 8.54E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0130 Cs-134 0.0001 5.67E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.27E+05 4.86E+07 0.0088 6.17E+08 0.0007 1.79E+06 0.2384 11 A002 Position#2 2

4.07E+05 Co-60 0.0121 4.92E+03 6.95E+06 0.0007 0.0096 8.82E+07 0.0001 0.0008 5.98E+06 0.0008 0.2427 Ni-63 180 8.87E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0048 Sr-90 0.002 8.05E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0122 Cs-134 0.0001 5.34E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.02E+05 4.86E+07 0.0083 6.17E+08 0.0007 1.79E+06 0.2248 12 A002 Position#3 3

5.13E+05 Co-60 0.0121 6.19E+03 6.95E+06 0.0009 0.0121 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.3055 Ni-63 180 1.12E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0060 Sr-90 0.002 1.01E+03 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0154 Cs-134 0.0001 6.72E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 5.06E+05 4.86E+07 0.0104 6.17E+08 0.0008 1.79E+06 0.2830 13 A003 Position#1 1

5.65E+05 Co-60 0.0121 6.82E+03 6.95E+06 0.0010 0.0133 8.82E+07 0.0001 0.0010 5.98E+06 0.0011 0.3365 Ni-63 180 1.23E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0066 Sr-90 0.002 1.12E+03 1.90E+06 0.0006 2.41E+07 0.0000 6.58E+04 0.0170 Cs-134 0.0001 7.41E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 5.58E+05 4.86E+07 0.0115 6.17E+08 0.0009 1.79E+06 0.3117 14 A003 Position#2 2

6.12E+05 Co-60 0.0121 7.39E+03 6.95E+06 0.0011 0.0144 8.82E+07 0.0001 0.0011 5.98E+06 0.0012 0.3647 Ni-63 180 1.33E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0072 Sr-90 0.002 1.21E+03 1.90E+06 0.0006 2.41E+07 0.0001 6.58E+04 0.0184 Cs-134 0.0001 8.03E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 6.05E+05 4.86E+07 0.0124 6.17E+08 0.0010 1.79E+06 0.3378 15 A003 Position#3 3

1.42E+06 Co-60 0.0121 1.72E+04 6.95E+06 0.0025 0.0335 8.82E+07 0.0002 0.0026 5.98E+06 0.0029 0.8484 Ni-63 180 3.10E+06 5.35E+09 0.0006 6.79E+10 0.0000 1.85E+08 0.0168 Sr-90 0.002 2.81E+03 1.90E+06 0.0015 2.41E+07 0.0001 6.58E+04 0.0428 Cs-134 0.0001 1.87E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 1.41E+06 4.86E+07 0.0289 6.17E+08 0.0023 1.79E+06 0.7859

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[37]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 16 A013 Position#1 1

6.57E+05 Co-60 0.0121 7.93E+03 6.95E+06 0.0011 0.0155 8.82E+07 0.0001 0.0012 5.98E+06 0.0013 0.3917 Ni-63 180 1.43E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0077 Sr-90 0.002 1.30E+03 1.90E+06 0.0007 2.41E+07 0.0001 6.58E+04 0.0197 Cs-134 0.0001 8.62E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 6.49E+05 4.86E+07 0.0134 6.17E+08 0.0011 1.79E+06 0.3628 17 A013 Position#2 2

6.88E+05 Co-60 0.0121 8.30E+03 6.95E+06 0.0012 0.0162 8.82E+07 0.0001 0.0013 5.98E+06 0.0014 0.4098 Ni-63 180 1.50E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0081 Sr-90 0.002 1.36E+03 1.90E+06 0.0007 2.41E+07 0.0001 6.58E+04 0.0207 Cs-134 0.0001 9.02E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 6.80E+05 4.86E+07 0.0140 6.17E+08 0.0011 1.79E+06 0.3796 18 A013 Position#3 3

7.07E+05 Co-60 0.0121 8.53E+03 6.95E+06 0.0012 0.0166 8.82E+07 0.0001 0.0013 5.98E+06 0.0014 0.4210 Ni-63 180 1.54E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0083 Sr-90 0.002 1.40E+03 1.90E+06 0.0007 2.41E+07 0.0001 6.58E+04 0.0212 Cs-134 0.0001 9.27E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 6.98E+05 4.86E+07 0.0144 6.17E+08 0.0011 1.79E+06 0.3900 19 A011 Position#1 1

1.03E+07 Co-60 0.0121 1.25E+05 6.95E+06 0.0179 0.2427 8.82E+07 0.0014 0.0191 5.98E+06 0.0208 6.1494 Ni-63 180 2.25E+07 5.35E+09 0.0042 6.79E+10 0.0003 1.85E+08 0.1215 Sr-90 0.002 2.04E+04 1.90E+06 0.0107 2.41E+07 0.0008 6.58E+04 0.3099 Cs-134 0.0001 1.35E+03 2.58E+07 0.0001 3.28E+08 0.0000 1.35E+06 0.0010 Cs-137 0.9878 1.02E+07 4.86E+07 0.2098 6.17E+08 0.0165 1.79E+06 5.6961 20 A011 Position#2 2

1.19E+07 Co-60 0.0121 1.43E+05 6.95E+06 0.0206 0.2794 8.82E+07 0.0016 0.0220 5.98E+06 0.0240 7.0781 Ni-63 180 2.59E+07 5.35E+09 0.0048 6.79E+10 0.0004 1.85E+08 0.1398 Sr-90 0.002 2.35E+04 1.90E+06 0.0124 2.41E+07 0.0010 6.58E+04 0.3567 Cs-134 0.0001 1.56E+03 2.58E+07 0.0001 3.28E+08 0.0000 1.35E+06 0.0012 Cs-137 0.9878 1.17E+07 4.86E+07 0.2415 6.17E+08 0.0190 1.79E+06 6.5564 21 A011 Position#3 3

1.00E+07 Co-60 0.0121 1.21E+05 6.95E+06 0.0174 0.2352 8.82E+07 0.0014 0.0185 5.98E+06 0.0202 5.9582 Ni-63 180 2.18E+07 5.35E+09 0.0041 6.79E+10 0.0003 1.85E+08 0.1177 Sr-90 0.002 1.98E+04 1.90E+06 0.0104 2.41E+07 0.0008 6.58E+04 0.3003 Cs-134 0.0001 1.31E+03 2.58E+07 0.0001 3.28E+08 0.0000 1.35E+06 0.0010 Cs-137 0.9878 9.88E+06 4.86E+07 0.2033 6.17E+08 0.0160 1.79E+06 5.5191 22 A012 Position#1 1

4.51E+05 Co-60 0.0121 5.44E+03 6.95E+06 0.0008 0.0106 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2685 Ni-63 180 9.81E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0053 Sr-90 0.002 8.91E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0135 Cs-134 0.0001 5.91E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.45E+05 4.86E+07 0.0092 6.17E+08 0.0007 1.79E+06 0.2487

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[38]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 23 A012 Position#2 2

4.56E+05 Co-60 0.0121 5.50E+03 6.95E+06 0.0008 0.0107 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2715 Ni-63 180 9.92E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0054 Sr-90 0.002 9.00E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0137 Cs-134 0.0001 5.98E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.50E+05 4.86E+07 0.0093 6.17E+08 0.0007 1.79E+06 0.2515 24 A012 Position#3 3

5.81E+05 Co-60 0.0121 7.01E+03 6.95E+06 0.0010 0.0137 8.82E+07 0.0001 0.0011 5.98E+06 0.0012 0.3459 Ni-63 180 1.26E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0068 Sr-90 0.002 1.15E+03 1.90E+06 0.0006 2.41E+07 0.0000 6.58E+04 0.0174 Cs-134 0.0001 7.62E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 5.74E+05 4.86E+07 0.0118 6.17E+08 0.0009 1.79E+06 0.3204 25 A019 Position#1 1

3.94E+05 Co-60 0.0121 4.75E+03 6.95E+06 0.0007 0.0093 8.82E+07 0.0001 0.0007 5.98E+06 0.0008 0.2345 Ni-63 180 8.57E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0046 Sr-90 0.002 7.78E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0118 Cs-134 0.0001 5.16E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.89E+05 4.86E+07 0.0080 6.17E+08 0.0006 1.79E+06 0.2172 26 A019 Position#2 2

3.92E+05 Co-60 0.0121 4.73E+03 6.95E+06 0.0007 0.0092 8.82E+07 0.0001 0.0007 5.98E+06 0.0008 0.2334 Ni-63 180 8.53E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0046 Sr-90 0.002 7.74E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0118 Cs-134 0.0001 5.14E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.87E+05 4.86E+07 0.0080 6.17E+08 0.0006 1.79E+06 0.2162 27 A019 Position#3 3

4.29E+05 Co-60 0.0121 5.18E+03 6.95E+06 0.0007 0.0101 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2556 Ni-63 180 9.34E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0050 Sr-90 0.002 8.48E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0129 Cs-134 0.0001 5.63E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.24E+05 4.86E+07 0.0087 6.17E+08 0.0007 1.79E+06 0.2368 28 A015 Position#1 1

5.50E+05 Co-60 0.0121 6.64E+03 6.95E+06 0.0010 0.0129 8.82E+07 0.0001 0.0010 5.98E+06 0.0011 0.3278 Ni-63 180 1.20E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0065 Sr-90 0.002 1.09E+03 1.90E+06 0.0006 2.41E+07 0.0000 6.58E+04 0.0165 Cs-134 0.0001 7.22E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 5.44E+05 4.86E+07 0.0112 6.17E+08 0.0009 1.79E+06 0.3037 29 A015 Position#2 2

5.46E+05 Co-60 0.0121 6.59E+03 6.95E+06 0.0009 0.0128 8.82E+07 0.0001 0.0010 5.98E+06 0.0011 0.3255 Ni-63 180 1.19E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0064 Sr-90 0.002 1.08E+03 1.90E+06 0.0006 2.41E+07 0.0000 6.58E+04 0.0164 Cs-134 0.0001 7.16E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 5.40E+05 4.86E+07 0.0111 6.17E+08 0.0009 1.79E+06 0.3015 30 A015 Position#3 3

6.26E+05 Co-60 0.0121 7.55E+03 6.95E+06 0.0011 0.0147 8.82E+07 0.0001 0.0012 5.98E+06 0.0013 0.3730 Ni-63 180 1.36E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0074 Sr-90 0.002 1.24E+03 1.90E+06 0.0007 2.41E+07 0.0001 6.58E+04 0.0188 Cs-134 0.0001 8.21E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 6.18E+05 4.86E+07 0.0127 6.17E+08 0.0010 1.79E+06 0.3455

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[39]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 31 A005 Position#1 1

3.74E+05 Co-60 0.0121 4.51E+03 6.95E+06 0.0006 0.0088 8.82E+07 0.0001 0.0007 5.98E+06 0.0008 0.2228 Ni-63 180 8.14E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0044 Sr-90 0.002 7.39E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0112 Cs-134 0.0001 4.90E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.69E+05 4.86E+07 0.0076 6.17E+08 0.0006 1.79E+06 0.2064 32 A005 Position#2 2

3.73E+05 Co-60 0.0121 4.50E+03 6.95E+06 0.0006 0.0088 8.82E+07 0.0001 0.0007 5.98E+06 0.0008 0.2222 Ni-63 180 8.12E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0044 Sr-90 0.002 7.37E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0112 Cs-134 0.0001 4.89E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.68E+05 4.86E+07 0.0076 6.17E+08 0.0006 1.79E+06 0.2058 33 A005 Position#3 3

4.20E+05 Co-60 0.0121 5.07E+03 6.95E+06 0.0007 0.0099 8.82E+07 0.0001 0.0008 5.98E+06 0.0008 0.2504 Ni-63 180 9.15E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0049 Sr-90 0.002 8.30E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0126 Cs-134 0.0001 5.51E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.15E+05 4.86E+07 0.0085 6.17E+08 0.0007 1.79E+06 0.2319 34 A020 Position#1 1

4.25E+05 Co-60 0.0121 5.13E+03 6.95E+06 0.0007 0.0100 8.82E+07 0.0001 0.0008 5.98E+06 0.0009 0.2533 Ni-63 180 9.26E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0050 Sr-90 0.002 8.40E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0128 Cs-134 0.0001 5.58E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.20E+05 4.86E+07 0.0086 6.17E+08 0.0007 1.79E+06 0.2346 35 A020 Position#2 2

4.96E+05 Co-60 0.0121 5.98E+03 6.95E+06 0.0009 0.0117 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.2955 Ni-63 180 1.08E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0058 Sr-90 0.002 9.80E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0149 Cs-134 0.0001 6.51E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.90E+05 4.86E+07 0.0101 6.17E+08 0.0008 1.79E+06 0.2737 36 A020 Position#3 3

4.93E+05 Co-60 0.0121 5.95E+03 6.95E+06 0.0009 0.0116 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.2937 Ni-63 180 1.07E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0058 Sr-90 0.002 9.74E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0148 Cs-134 0.0001 6.47E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.87E+05 4.86E+07 0.0100 6.17E+08 0.0008 1.79E+06 0.2721 37 A021 Position#1 1

5.53E+05 Co-60 0.0121 6.67E+03 6.95E+06 0.0010 0.0130 8.82E+07 0.0001 0.0010 5.98E+06 0.0011 0.3295 Ni-63 180 1.20E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0065 Sr-90 0.002 1.09E+03 1.90E+06 0.0006 2.41E+07 0.0000 6.58E+04 0.0166 Cs-134 0.0001 7.25E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 5.46E+05 4.86E+07 0.0112 6.17E+08 0.0009 1.79E+06 0.3052 38 A021 Position#2 2

4.64E+05 Co-60 0.0121 5.59E+03 6.95E+06 0.0008 0.0109 8.82E+07 0.0001 0.0009 5.98E+06 0.0009 0.2762 Ni-63 180 1.01E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0055 Sr-90 0.002 9.16E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0139 Cs-134 0.0001 6.08E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.58E+05 4.86E+07 0.0094 6.17E+08 0.0007 1.79E+06 0.2558

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[40]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 39 A021 Position#3 3

4.66E+05 Co-60 0.0121 5.63E+03 6.95E+06 0.0008 0.0110 8.82E+07 0.0001 0.0009 5.98E+06 0.0009 0.2779 Ni-63 180 1.02E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0055 Sr-90 0.002 9.22E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0140 Cs-134 0.0001 6.12E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.61E+05 4.86E+07 0.0095 6.17E+08 0.0007 1.79E+06 0.2574 40 A022 Position#1 1

3.68E+05 Co-60 0.0121 4.44E+03 6.95E+06 0.0006 0.0087 8.82E+07 0.0001 0.0007 5.98E+06 0.0007 0.2193 Ni-63 180 8.01E+05 5.35E+09 0.0001 6.79E+10 0.0000 1.85E+08 0.0043 Sr-90 0.002 7.27E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0111 Cs-134 0.0001 4.83E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.64E+05 4.86E+07 0.0075 6.17E+08 0.0006 1.79E+06 0.2031 41 A022 Position#2 2

3.70E+05 Co-60 0.0121 4.46E+03 6.95E+06 0.0006 0.0087 8.82E+07 0.0001 0.0007 5.98E+06 0.0007 0.2205 Ni-63 180 8.06E+05 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0044 Sr-90 0.002 7.31E+02 1.90E+06 0.0004 2.41E+07 0.0000 6.58E+04 0.0111 Cs-134 0.0001 4.85E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.66E+05 4.86E+07 0.0075 6.17E+08 0.0006 1.79E+06 0.2042 42 A022 Position#3 3

5.00E+05 Co-60 0.0121 6.03E+03 6.95E+06 0.0009 0.0118 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.2979 Ni-63 180 1.09E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0059 Sr-90 0.002 9.88E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0150 Cs-134 0.0001 6.56E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.94E+05 4.86E+07 0.0102 6.17E+08 0.0008 1.79E+06 0.2759 43 A023 Position#1 1

5.16E+06 Co-60 0.0121 6.23E+04 6.95E+06 0.0090 0.1214 8.82E+07 0.0007 0.0096 5.98E+06 0.0104 3.0764 Ni-63 180 1.12E+07 5.35E+09 0.0021 6.79E+10 0.0002 1.85E+08 0.0608 Sr-90 0.002 1.02E+04 1.90E+06 0.0054 2.41E+07 0.0004 6.58E+04 0.1550 Cs-134 0.0001 6.77E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0005 Cs-137 0.9878 5.10E+06 4.86E+07 0.1050 6.17E+08 0.0083 1.79E+06 2.8497 44 A023 Position#2 2

7.02E+06 Co-60 0.0121 8.47E+04 6.95E+06 0.0122 0.1650 8.82E+07 0.0010 0.0130 5.98E+06 0.0142 4.1811 Ni-63 180 1.53E+07 5.35E+09 0.0029 6.79E+10 0.0002 1.85E+08 0.0826 Sr-90 0.002 1.39E+04 1.90E+06 0.0073 2.41E+07 0.0006 6.58E+04 0.2107 Cs-134 0.0001 9.20E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0007 Cs-137 0.9878 6.93E+06 4.86E+07 0.1426 6.17E+08 0.0112 1.79E+06 3.8729 45 A023 Position#3 3

5.40E+06 Co-60 0.0121 6.52E+04 6.95E+06 0.0094 0.1270 8.82E+07 0.0007 0.0100 5.98E+06 0.0109 3.2190 Ni-63 180 1.18E+07 5.35E+09 0.0022 6.79E+10 0.0002 1.85E+08 0.0636 Sr-90 0.002 1.07E+04 1.90E+06 0.0056 2.41E+07 0.0004 6.58E+04 0.1622 Cs-134 0.0001 7.09E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0005 Cs-137 0.9878 5.34E+06 4.86E+07 0.1098 6.17E+08 0.0087 1.79E+06 2.9817 46 A017 Position#1 1

8.21E+05 Co-60 0.0121 9.91E+03 6.95E+06 0.0014 0.0193 8.82E+07 0.0001 0.0015 5.98E+06 0.0017 0.4893 Ni-63 180 1.79E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0097 Sr-90 0.002 1.62E+03 1.90E+06 0.0009 2.41E+07 0.0001 6.58E+04 0.0247 Cs-134 0.0001 1.08E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 8.11E+05 4.86E+07 0.0167 6.17E+08 0.0013 1.79E+06 0.4533

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[41]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 47 A017 Position#2 2

8.85E+05 Co-60 0.0121 1.07E+04 6.95E+06 0.0015 0.0208 8.82E+07 0.0001 0.0016 5.98E+06 0.0018 0.5272 Ni-63 180 1.93E+06 5.35E+09 0.0004 6.79E+10 0.0000 1.85E+08 0.0104 Sr-90 0.002 1.75E+03 1.90E+06 0.0009 2.41E+07 0.0001 6.58E+04 0.0266 Cs-134 0.0001 1.16E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 8.74E+05 4.86E+07 0.0180 6.17E+08 0.0014 1.79E+06 0.4884 48 A017 Position#3 3

1.07E+06 Co-60 0.0121 1.29E+04 6.95E+06 0.0019 0.0251 8.82E+07 0.0001 0.0020 5.98E+06 0.0022 0.6357 Ni-63 180 2.32E+06 5.35E+09 0.0004 6.79E+10 0.0000 1.85E+08 0.0126 Sr-90 0.002 2.11E+03 1.90E+06 0.0011 2.41E+07 0.0001 6.58E+04 0.0320 Cs-134 0.0001 1.40E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 1.05E+06 4.86E+07 0.0217 6.17E+08 0.0017 1.79E+06 0.5889 49 A010 Position#1 1

6.97E+05 Co-60 0.0121 8.41E+03 6.95E+06 0.0012 0.0164 8.82E+07 0.0001 0.0013 5.98E+06 0.0014 0.4153 Ni-63 180 1.52E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0082 Sr-90 0.002 1.38E+03 1.90E+06 0.0007 2.41E+07 0.0001 6.58E+04 0.0209 Cs-134 0.0001 9.14E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 6.89E+05 4.86E+07 0.0142 6.17E+08 0.0011 1.79E+06 0.3846 50 A010 Position#2 2

7.12E+05 Co-60 0.0121 8.59E+03 6.95E+06 0.0012 0.0167 8.82E+07 0.0001 0.0013 5.98E+06 0.0014 0.4240 Ni-63 180 1.55E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0084 Sr-90 0.002 1.41E+03 1.90E+06 0.0007 2.41E+07 0.0001 6.58E+04 0.0214 Cs-134 0.0001 9.33E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 7.03E+05 4.86E+07 0.0145 6.17E+08 0.0011 1.79E+06 0.3928 51 A010 Position#3 3

8.35E+05 Co-60 0.0121 1.01E+04 6.95E+06 0.0014 0.0196 8.82E+07 0.0001 0.0015 5.98E+06 0.0017 0.4975 Ni-63 180 1.82E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0098 Sr-90 0.002 1.65E+03 1.90E+06 0.0009 2.41E+07 0.0001 6.58E+04 0.0251 Cs-134 0.0001 1.10E+02 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 8.25E+05 4.86E+07 0.0170 6.17E+08 0.0013 1.79E+06 0.4608 52 A001 Position #1 3

3.48E+04 Co-60 0.0121 4.20E+02 6.95E+06 0.0001 0.0008 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0208 Ni-63 180 7.59E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0004 Sr-90 0.002 6.88E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0010 Cs-134 0.0001 4.57E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.44E+04 4.86E+07 0.0007 6.17E+08 0.0001 1.79E+06 0.0192 53 A001 Position #2 2

3.82E+04 Co-60 0.0121 4.61E+02 6.95E+06 0.0001 0.0009 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0228 Ni-63 180 8.33E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0005 Sr-90 0.002 7.56E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0011 Cs-134 0.0001 5.02E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.78E+04 4.86E+07 0.0008 6.17E+08 0.0001 1.79E+06 0.0211 54 A001 Position #3 1

3.62E+04 Co-60 0.0121 4.37E+02 6.95E+06 0.0001 0.0009 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0216 Ni-63 180 7.89E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0004 Sr-90 0.002 7.16E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0011 Cs-134 0.0001 4.75E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.58E+04 4.86E+07 0.0007 6.17E+08 0.0001 1.79E+06 0.0200

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[42]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 55 A014 Position #1 3

2.24E+04 Co-60 0.0121 2.71E+02 6.95E+06 0.0000 0.0005 8.82E+07 0.0000 0.0000 5.98E+06 0.0000 0.0134 Ni-63 180 4.88E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 4.43E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0007 Cs-134 0.0001 2.94E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.22E+04 4.86E+07 0.0005 6.17E+08 0.0000 1.79E+06 0.0124 56 A014 Position #2 2

2.92E+04 Co-60 0.0121 3.53E+02 6.95E+06 0.0001 0.0007 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0174 Ni-63 180 6.36E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 5.78E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0009 Cs-134 0.0001 3.83E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.89E+04 4.86E+07 0.0006 6.17E+08 0.0000 1.79E+06 0.0161 57 A014 Position #3 1

3.36E+04 Co-60 0.0121 4.06E+02 6.95E+06 0.0001 0.0008 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0200 Ni-63 180 7.32E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0004 Sr-90 0.002 6.65E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0010 Cs-134 0.0001 4.41E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.32E+04 4.86E+07 0.0007 6.17E+08 0.0001 1.79E+06 0.0186 58 A004 Position #1 3

3.14E+04 Co-60 0.0121 3.79E+02 6.95E+06 0.0001 0.0007 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0187 Ni-63 180 6.84E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0004 Sr-90 0.002 6.21E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0009 Cs-134 0.0001 4.12E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.11E+04 4.86E+07 0.0006 6.17E+08 0.0001 1.79E+06 0.0173 59 A004 Position #2 2

2.80E+04 Co-60 0.0121 3.38E+02 6.95E+06 0.0000 0.0007 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0167 Ni-63 180 6.10E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 5.54E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0008 Cs-134 0.0001 3.68E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.77E+04 4.86E+07 0.0006 6.17E+08 0.0000 1.79E+06 0.0155 60 A004 Position #3 1

3.58E+04 Co-60 0.0121 4.32E+02 6.95E+06 0.0001 0.0008 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0214 Ni-63 180 7.80E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0004 Sr-90 0.002 7.08E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0011 Cs-134 0.0001 4.70E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.54E+04 4.86E+07 0.0007 6.17E+08 0.0001 1.79E+06 0.0198 61 A024 Position #1 3

3.72E+04 Co-60 0.0121 4.49E+02 6.95E+06 0.0001 0.0009 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0222 Ni-63 180 8.11E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0004 Sr-90 0.002 7.36E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0011 Cs-134 0.0001 4.88E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 3.68E+04 4.86E+07 0.0008 6.17E+08 0.0001 1.79E+06 0.0206 62 A024 Position #2 2

6.31E+04 Co-60 0.0121 7.61E+02 6.95E+06 0.0001 0.0015 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0376 Ni-63 180 1.37E+05 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0007 Sr-90 0.002 1.25E+02 1.90E+06 0.0001 2.41E+07 0.0000 6.58E+04 0.0019 Cs-134 0.0001 8.27E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 6.23E+04 4.86E+07 0.0013 6.17E+08 0.0001 1.79E+06 0.0348

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[43]

Penetration Survey Data Assessment (continued)

No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 63 A024 Position #3 1

1.11E+05 Co-60 0.0121 1.34E+03 6.95E+06 0.0002 0.0026 8.82E+07 0.0000 0.0002 5.98E+06 0.0002 0.0662 Ni-63 180 2.42E+05 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0013 Sr-90 0.002 2.20E+02 1.90E+06 0.0001 2.41E+07 0.0000 6.58E+04 0.0033 Cs-134 0.0001 1.46E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 1.10E+05 4.86E+07 0.0023 6.17E+08 0.0002 1.79E+06 0.0613 64 A025 Position #1 3

2.74E+04 Co-60 0.0121 3.31E+02 6.95E+06 0.0000 0.0006 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0163 Ni-63 180 5.97E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 5.42E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0008 Cs-134 0.0001 3.60E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.71E+04 4.86E+07 0.0006 6.17E+08 0.0000 1.79E+06 0.0151 65 A025 Position #2 2

2.60E+04 Co-60 0.0121 3.14E+02 6.95E+06 0.0000 0.0006 8.82E+07 0.0000 0.0000 5.98E+06 0.0001 0.0155 Ni-63 180 5.67E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 5.14E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0008 Cs-134 0.0001 3.41E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.57E+04 4.86E+07 0.0005 6.17E+08 0.0000 1.79E+06 0.0144 66 A025 Position #3 1

2.94E+04 Co-60 0.0121 3.55E+02 6.95E+06 0.0001 0.0007 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0175 Ni-63 180 6.41E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 5.81E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0009 Cs-134 0.0001 3.86E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.91E+04 4.86E+07 0.0006 6.17E+08 0.0000 1.79E+06 0.0162

[44]

ATTACHMENT 3 SIGN TEST

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[45]

Sign Test Auxiliary Building Basement Penetrations Survey Area 05120 Description Auxiliary Building Basement Survey Unit S1-05120AF Description Penetrations Classification 1

Type I Error 0.05

of Measurements 66 SOF 1-Ws Sign SOF 1-Ws Sign (Ws)

(Ws) 1 0.0094 0.99

+1 34 0.0100 0.99

+1 2

0.0097 0.99

+1 35 0.0117 0.99

+1 3

0.0100 0.99

+1 36 0.0116 0.99

+1 4

0.0123 0.99

+1 37 0.0130 0.99

+1 5

0.0112 0.99

+1 38 0.0109 0.99

+1 6

0.0111 0.99

+1 39 0.0110 0.99

+1 7

0.0103 0.99

+1 40 0.0087 0.99

+1 8

0.0101 0.99

+1 41 0.0087 0.99

+1 9

0.0103 0.99

+1 42 0.0118 0.99

+1 10 0.0102 0.99

+1 43 0.1214 0.88

+1 11 0.0096 0.99

+1 44 0.1650 0.83

+1 12 0.0121 0.99

+1 45 0.1270 0.87

+1 13 0.0133 0.99

+1 46 0.0193 0.98

+1 14 0.0144 0.99

+1 47 0.0208 0.98

+1 15 0.0335 0.97

+1 48 0.0251 0.97

+1 16 0.0155 0.98

+1 49 0.0164 0.98

+1 17 0.0162 0.98

+1 50 0.0167 0.98

+1 18 0.0166 0.98

+1 51 0.0196 0.98

+1 19 0.2427 0.76

+1 52 0.0008 1.00

+1 20 0.2794 0.72

+1 53 0.0009 1.00

+1 21 0.2352 0.76

+1 54 0.0009 1.00

+1 22 0.0106 0.99

+1 55 0.0005 1.00

+1 23 0.0107 0.99

+1 56 0.0007 1.00

+1 24 0.0137 0.99

+1 57 0.0008 1.00

+1 25 0.0093 0.99

+1 58 0.0007 1.00

+1 26 0.0092 0.99

+1 59 0.0007 1.00

+1 27 0.0101 0.99

+1 60 0.0008 1.00

+1 28 0.0129 0.99

+1 61 0.0009 1.00

+1 29 0.0128 0.99

+1 62 0.0015 1.00

+1 30 0.0147 0.99

+1 63 0.0026 0.99

+1 31 0.0088 0.99

+1 64 0.0006 1.00

+1

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[46]

Sign Test (continued)

Auxiliary Building Basement Penetrations SOF 1-Ws Sign SOF 1-Ws Sign (Ws)

(Ws) 32 0.0088 0.99

+1 65 0.0006 1.00

+1 33 0.0099 0.99

+1 66 0.0007 1.00

+1 Number of Positive Differences (S+) =

66 Critical Value =

40 Survey Unit Meets the Acceptance Criteria

[47]

ATTACHMENT 4 QC DATA

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[48]

Penetration QC Survey Data No.

Sample ID Feet into Pipe Gamma Result ROC Gamma Mixture/

HTD Ratio Activity per ROC Auxiliary OpDCGLPN Auxiliary ROC OpSOFPN Auxiliary Total OpSOFPN Auxiliary BcDCGLPN Auxiliary ROC BcSOFPN Auxiliary Total BcSOFPN Turbine OpDCGLB Turbine ROC OpSOFB Turbine Total OpSOFB (pCi/m2)

(pCi/m2)

(pCi/m2) 54 QC A014 Position #3 1

2.90E+04 Co-60 0.0121 3.50E+02 6.95E+06 0.0001 0.0007 8.82E+07 0.0000 0.0001 5.98E+06 0.0001 0.0173 Ni-63 180 6.32E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 5.74E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0009 Cs-134 0.0001 3.81E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.87E+04 4.86E+07 0.0006 6.17E+08 0.0000 1.79E+06 0.0160 66 QC A025 Position #3 1

2.40E+04 Co-60 0.0121 2.90E+02 6.95E+06 0.0000 0.0006 8.82E+07 0.0000 0.0000 5.98E+06 0.0000 0.0143 Ni-63 180 5.23E+04 5.35E+09 0.0000 6.79E+10 0.0000 1.85E+08 0.0003 Sr-90 0.002 4.75E+01 1.90E+06 0.0000 2.41E+07 0.0000 6.58E+04 0.0007 Cs-134 0.0001 3.15E+00 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 2.37E+04 4.86E+07 0.0005 6.17E+08 0.0000 1.79E+06 0.0133 38 QC A021 Position #2 2

4.66E+05 Co-60 0.0121 5.62E+03 6.95E+06 0.0008 0.0109 8.82E+07 0.0001 0.0009 5.98E+06 0.0009 0.2773 Ni-63 180 1.01E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0055 Sr-90 0.002 9.20E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0140 Cs-134 0.0001 6.11E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.60E+05 4.86E+07 0.0095 6.17E+08 0.0007 1.79E+06 0.2569 10 QC A002 Position #1 1

4.81E+05 Co-60 0.0121 5.81E+03 6.95E+06 0.0008 0.0113 8.82E+07 0.0001 0.0009 5.98E+06 0.0010 0.2867 Ni-63 180 1.05E+06 5.35E+09 0.0002 6.79E+10 0.0000 1.85E+08 0.0057 Sr-90 0.002 9.51E+02 1.90E+06 0.0005 2.41E+07 0.0000 6.58E+04 0.0144 Cs-134 0.0001 6.31E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0000 Cs-137 0.9878 4.75E+05 4.86E+07 0.0098 6.17E+08 0.0008 1.79E+06 0.2656 50 QC A010 Position #2 2

7.21E+05 Co-60 0.0121 8.71E+03 6.95E+06 0.0013 0.0170 8.82E+07 0.0001 0.0013 5.98E+06 0.0015 0.4298 Ni-63 180 1.57E+06 5.35E+09 0.0003 6.79E+10 0.0000 1.85E+08 0.0085 Sr-90 0.002 1.43E+03 1.90E+06 0.0008 2.41E+07 0.0001 6.58E+04 0.0217 Cs-134 0.0001 9.46E+01 2.58E+07 0.0000 3.28E+08 0.0000 1.35E+06 0.0001 Cs-137 0.9878 7.13E+05 4.86E+07 0.0147 6.17E+08 0.0012 1.79E+06 0.3982

[49]

ATTACHMENT 5 QC MEASUREMENT ASSESSMENTS

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[50]

Replicate Measurement Assessment Survey Unit #

05120 Survey Unit Name Auxiliary Building Penetrationst Sample Plan #

S1-05120A-F Sample

Description:

Comparison of replicate gross-gamma measurements for QC from A002, position 1, A010, position 2, A014, position 3, A021, position 2 and A025 position 3.

STANDARD DUPLICATE ID ACTIVITY

+20%

-20%

ID ACTIVITY ACCEPTABLE (pCi/m2)

(pCi/m2)

(Y/N)

A014 Position 3 3.36E+04 4.04E+04 2.69E+04 A014 Position 3 QC 2.90E+04 Y

A025 Position 3 2.94E+04 3.53E+04 2.35E+04 A025 Position 3 QC 2.40E+04 Y

A021 Position 2 4.64E+05 5.56E+05 3.71E+05 A021 Position 2 QC 4.66E+05 Y

A002 Position 1 4.32E+05 5.18E+05 3.46E+05 A002 Position 1 QC 4.81E+05 Y

A010 Position 2 7.12E+05 8.54E+05 5.69E+05 A010 Position 2 QC 7.21E+05 Y

Comments/Corrective Actions: There was acceptable agreement between the standard measurement and the duplicate measurement. No further action is necessary.

The acceptance criteria for replicate static measurements and scan surveys is that the same conclusion is reached for each measurement. That is defined as + 20% of the standard

[51]

ATTACHMENT 6 GRAPHICAL PRESENTATIONS

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[52]

Quantile Plot for Co-60 Survey Unit: S1-05120A-F

==

Description:==

Aux Building Penetrations Mean:

1.38E+04pCi/m2 0.00E+00 2.00E+04 4.00E+04 6.00E+04 8.00E+04 1.00E+05 1.20E+05 1.40E+05 1.60E+05 0%

20%

40%

60%

80%

100%

Concentration (pCi/m2)

Percentage

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[53]

Quantile Plot for Cs-137 Survey Unit: S1-05120A-F

==

Description:==

Aux Building Penetrations Mean:

1.13E+06 pCi/m2 0.00E+00 2.00E+06 4.00E+06 6.00E+06 8.00E+06 1.00E+07 1.20E+07 1.40E+07 0%

20%

40%

60%

80%

100%

Concentration (pCi/m2)

Percentage

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[54]

Histogram for Co-60 Survey Unit: S1-05120A-F

==

Description:==

Aux Building Penetrations Mean:

1.38E+04 pCi/m2 Median:

5.47E+03pCi/m2 ST Dev.:

2.92E+04 Skew:

3.37E+00 Upper Value Observation Frequency Observation %

1.49E+04 59 89%

2.92E+04 1

2%

4.35E+04 0

0%

5.79E+04 0

0%

7.22E+04 3

5%

8.65E+04 0

0%

1.01E+05 0

0%

1.15E+05 0

0%

1.30E+05 2

3%

1.44E+05 1

2%

TOTAL 66 100%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

1.00E+00 3.00E+00 5.00E+00 7.00E+00 9.00E+00 Frequency Upper End Value (pCi/m2)

FSS RELEASE RECORD AUXILIARY BUILDING PENETRATIONS SURVEY UNIT 05120

[55]

Histogram for Cs-137 Survey Unit: S1-05120A-F

==

Description:==

Aux Building Penetrations Mean:

1.13E+05 pCi/m2 Median:

4.48E+05pCi/m2 ST Dev.:

2.39E+06 Skew:

3.37E+00 Upper Value Observation Frequency Observation %

1.22E+06 59 89%

2.39E+06 1

2%

3.56E+06 0

0%

4.74E+06 0

0%

5.91E+06 2

3%

7.08E+06 1

2%

8.26E+06 0

0%

9.43E+06 0

0%

1.06E+07 2

3%

1.18E+07 1

2%

TOTAL 66 100%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

59 1

0 0

2 1

0 0

2 1

Frequency Upper End Value (pCi/m2)

ML19295G831

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