ML19077A058

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Submittal of Final Status Survey (FSS) Final Report, Phase 2, Part 1 - Unit 2 Diesel Fuel Oil Storage Tank Room Survey 06202
ML19077A058
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 01/09/2019
From: Giza P
ZionSolutions
To:
Office of Nuclear Material Safety and Safeguards
References
ZS-2019-0017
Download: ML19077A058 (338)
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Text

ZION STATION RESTORATION PROJECT FINAL STATUS SURVEY RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 PREPARED BY / DATE: 1/9/2019 Patsy Giza, Radiological Engineer REVIEWED BY / DATE: _______________________________________

1/9/2019 Jeffrey Graham, Radiological Engineer APPROVED BY / DATE: _______________________________________

1/9/2019 D. Wojtkowiak, C/LT Manager

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 TABLE OF CONTENTS

1. EXECUTIVE

SUMMARY

................................................................................................ 7

2. SURVEY UNIT DESCRIPTION ...................................................................................... 8
3. CLASSIFICATION BASIS ............................................................................................... 8
4. DATA QUALITY OBJECTIVES (DQO) ........................................................................ 9
5. SURVEY DESIGN ........................................................................................................... 13
6. SURVEY IMPLEMENTATION .................................................................................... 18
7. SURVEY RESULTS ........................................................................................................ 19
8. QUALITY CONTROL .................................................................................................... 24
9. INVESTIGATION AND RESULTS .............................................................................. 24
10. REMEDIATION AND RESULTS.................................................................................. 24
11. CHANGES FROM THE FINAL STATUS SURVEY PLAN ...................................... 25
12. DATA QUALITY ASSESSMENT (DQA) ..................................................................... 25
13. ANOMALIES ................................................................................................................... 25
14. CONCLUSION ................................................................................................................. 25
15. REFERENCES ................................................................................................................. 26
16. ATTACHMENTS ............................................................................................................. 27 ATTACHMENT 1, FIGURES AND MAPS ......................................................................28 ATTACHMENT 2, ISOCS GEOMETRY ..........................................................................31 ATTACHMENT 3, QC MEASUREMENT ASSESSMENTS ..........................................42 ATTACHMENT 4, EBERLINE REPORT.........................................................................46 ATTACHMENT 5, ISOCS ANALYTICAL REPORTS ....................................................58

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 LIST OF FIGURES Figure 1 - Diesel Fuel Oil Storage Tank Room ........................................................................... 22 LIST OF TABLES Table 1 - Dose Significant Radionuclides and Mixture ................................................................ 10 Table 2 - Base Case DCGLs (DCGLB) from LTP Chapter 5, Table 5-3 ...................................... 12 Table 3 - Operational DCGLs (DCGLB) from LTP Chapter 5, Table 5-4 ................................... 13 Table 4 - Surrogate Ratios ............................................................................................................ 15 Table 5 - Investigation Levels....................................................................................................... 16 Table 6 - Synopsis of the Survey Design ...................................................................................... 17 Table 7 - Unit 2 Diesel Fuel Oil Storage Tank Room- Measured Concentrations of ROC for FSS ................................................................................................................ 20 Table 8 - Diesel Fuel Oil Storage Tank Room Statistical Quantities ........................................... 23 Table 9 - Summary of ISOCS Replicate Measurements for QC .................................................. 23 Table 10 - Summary of FSS Concrete Core Analysis by Eberline ............................................... 24

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 LIST OF ACRONYMS AND ABBREVIATIONS ALARA As Low As Reasonably Achievable AMCG Average Member of the Critical Group BFM Basement Fill Model CoC Chain-of-Custody DQA Data Quality Assessment DQO Data Quality Objective DCGL Derived Concentration Guideline Level EMC Elevated Measurement Comparison FSS Final Status Survey GPS Global Positioning System HTD Hard-to-Detect IC Insignificant Contributor LTP License Termination Plan LBGR Lower Bound of the Gray Region MARSSIM Multi-Agency Radiation Survey and Site Investigation Manual MDC Minimum Detectable Concentration MDCR Minimal Detectable Count Rate NAD North American Datum NaI Sodium Iodide OpDCGL Operational Derived Concentration Guideline Level QAPP Quality Assurance Project Plan QC Quality Control RE Radiological Engineer ROC Radionuclides of Concern SOF Sum-of-Fraction TEDE Total Effective Dose Equivalent UBGR Upper Bound of the Gray Region

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 UCL Upper Confidence Level USNRC United States Nuclear Regulatory Commission VCC Vertical Concrete Cask VSP Visual Sample Plan ZNPS Zion Nuclear Power Station ZSRP Zion Station Restoration Project

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

1. EXECUTIVE

SUMMARY

This Final Status Survey (FSS) Release Record for Survey Unit #B1-06202AF, Unit 2 Diesel Fuel Oil Storage Tank Room, 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).

The FSS Sample Plan #B1-06202AF was developed in accordance with ZionSolutions procedure ZS-LT-300-001-001, Final Status Survey Package Development (Reference

3) the ZSRP LTP, and guidance from NUREG-1575, Revision 1, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (Reference 4).

In April of 2016, an FSS was conducted on the Turbine Building Basement structure.

The Sample Plan design for the FSS of the Turbine Building did not include the surface area of the Unit 1 and Unit 2 Diesel Fuel Oil Storage Tank Rooms. A separate Sample Plan was written to include fifty-one (51) judgmental measurements to represent the surface area of the Diesel Fuel Oil Storage Tank Room. The weighted average of the judgmental ISOCS measurements will be added to the systematic mean of the Turbine Building Basement.

In accordance with ZSRP LTP Chapter 5, section 5.5.2.1.2 and Table 5-19, the Turbine Building (TB) survey unit has a MARSSIM classification of 3. The Diesel Fuel Oil Storage Tank Room was re-classified as a Class 1 due to it becoming a pathway for radioactive waste from the Auxiliary Building during decommissioning.

Final Status Survey was performed on the Diesel Oil rooms to demonstrate that the concentrations of residual radioactivity were equal to or below site-specific Derived Concentration Guideline Levels (DCGL) corresponding to the dose criterion in 10 CFR 20.1402. The Unit 2 Diesel Fuel Oil Storage Tank Room has a MARSSIM Classification of 1. A Sample Plan was designed based upon use of the Sign Test as the nonparametric statistical test for compliance. Both the Type I () and Type II ()

decision error rates were set at 0.05. The Canberra In Situ Object Counting System (ISOCS) was selected as the primary instrument used to perform FSS. To ensure 100%

of the surface area was surveyed in accordance with the classification, fifty-one (51)

ISOCS measurement locations were selected using several adjusted Field-of-View (FOV) geometrys as specified in ZionSolutions TSD 14-022, Use of In-Situ Gamma Spectroscopy for Source Term Survey of End State Structures (Reference 5).

The results of the 51 ISOCS judgmental measurement results showed that the Sum-of-Fractions (SOF) for each measurement was less than one (1) when applying the

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 respective Operational Derived Concentration Guideline Levels (OpDCGL) for the Turbine Building Basement from ZionSolutions TSD 17-004, Operational Derived Concentration Guideline Levels for FSS (Reference 6). Therefore, the null hypothesis is rejected and the Unit 2 Diesel Fuel Oil Storage Tank Room is acceptable for unrestricted release.

2. SURVEY UNIT DESCRIPTION Unit 2 Diesel Fuel Oil Storage Tank Room was located on the 570 elevation and housed the oil for the Unit 2 Diesel Generator. The rooms were adjacent to the Turbine Building on the West side of the G (Column) Wall which divided the Turbine Building and Auxiliary Building. The entrance into the Unit 2 Diesel Fuel Oil room was from the Steam Tunnel stair wells from elevation 592 of the TB to the 570 elevation (See Figure-1). The area of this structural survey unit is estimated at approximately 813 m2..

Figure 1- Unit 2 Diesel Fuel Oil Storage Tank Room

3. CLASSIFICATION BASIS The Turbine Building basement (Survey Unit 06100) was classified in accordance with ZionSolutions procedure ZS-LT-300-001-002, Survey Unit Classification (Reference 7). The Diesel Fuel Oil Storage Tank Room is part of the Turbine Building basement survey unit. The Turbine Building was classified as a mixture of Class 2 and Class 3 structural survey units in accordance with the Zion Station Historical Site Assessment (HSA) (Reference 8). In LTP Chapter 5, section 5.5.2, it states that the survey units designated for structures below 588 foot elevation from the HSA that were presented in

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 LTP Chapter 2, Table 2-2 were based on screening values and source term assumptions that are significantly different from the Basement Fill Model (BFM) and are therefore not applicable. LTP Chapter 5, section 5.5.2.1.1 states that the FSS units for the basements of the Turbine Building, the Crib House/Forebay and the Circulating Water Discharge Tunnels are designated as Class 3 as defined in MARSSIM section 2.2 in that the FSS units are not expected to contain any residual radioactivity, or are expected to contain levels of residual radioactivity at a small fraction of the DCGLs, based on site operating history and previous radiation surveys.

During decommissioning, the primary pathway into and out of the basement of the Auxiliary Building became the Unit 1 and Unit 2 570 foot elevation Diesel Fuel Oil floors. Ramps were constructed through each into the 542 foot elevation to allow for the transit of heavy equipment and removal of radioactive commodities. Due to the introduction of radioactive material into both of these areas, they were reclassified as Class 1 survey units in accordance with ZS-LT-300-001-002.

The FSS Radiological Engineer (RE) performed a visual inspection and walk-down of the survey unit on 05/30/2018 prior to performing FSS. 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. A final classification assessment was performed in accordance with procedure ZS-LT-300-001-002 as part of the survey design for FSS.

4. DATA QUALITY OBJECTIVES (DQO)

Final Status Survey planning and design hinges on coherence with the Data Quality Objective (DQO) process to ensure, through compliance with explicitly defined inputs and boundaries, that the primary objectives of the survey is satisfied. The DQO process is described in the ZSRP LTP. The appropriate design for a given survey is 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.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 The primary objective of the FSS sample plan is to demonstrate that the level of residual radioactivity in Survey Unit #B1-06202AF did not exceed the 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, Potential Radionuclides of Concern during the Decommissioning of Zion Station (Reference 9) established the basis for an initial suite of potential ROC for the decommissioning of the Zion Nuclear Power Station (ZNPS).

LTP Chapter 2 provides detailed characterization data that described contamination levels in the basements. Concrete core samples were collected during characterization surveys were obtained at biased locations where there were elevated contact dose rates and/or evidence of leaks/spills. The collected core samples were analyzed for the presence of plant-derived radionuclides.

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. LTP section 6.5.2 also states that the Auxiliary Basement ROC and the IC percentage of 5% for adjusting ROC DCGLs will also be applied to all other Basements including the Diesel Fuel Oil Storage unless different values are justified by the results of continuing characterization or FSS HTD analysis. Table 1 presents the ROC for the Auxiliary Basement structural surfaces and the normalized fractions based on the radionuclide mixture.

Table 1 - Dose Significant Radionuclides and Mixture

% of Total Activity Radionuclide (normalized)(1)

Co-60 0.92 Cs-134 0.01 Cs-137 75.32 Ni-63 23.71 Sr-90 0.05

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 structures.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 The End State Basements will be 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 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 onto 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, 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 Basement Derived Concentration Guideline Levels (DCGL), in units of pCi/m2, which are calculated using the BFM GW and BFM Drilling Spoils Dose Factors (LTP Chapter 6, Tables 6-24 and 6-25). The DCGLs for basement structure surfaces are calculated separately for the GW and Drilling Spoils scenarios and for the summation of both scenarios. The summation DCGL is designated as the Base Case DCGL and is used during FSS to demonstrate compliance (analogous to the DCGLW as defined in MARSSIM). The Base Case DCGLs are radionuclide-specific concentrations that represent the 10 CFR 20.1402 dose criterion of 25 mrem/year and are calculated for each ROC and each backfilled Basement.

When applied to structures, the DCGLs are expressed in units of activity per unit of area (pCi/m2). 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 Base Case DCGLs for the unrestricted release of the Turbine Building (including the Diesel Fuel Oil Storage Tank Rooms) are provided in Table 2. The IC dose percentage of 5% was used to adjust the Turbine Building Base Case DCGLs to account for the dose from the eliminated IC radionuclides.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Table 2 - Base Case DCGLs (DCGLB) from LTP Chapter 5, Table 5-3 Turbine Building Radionuclide DCGLB (pCi/m2)

Co-60 7.03E+07 Ni-63 2.18E+09 Sr-90 7.74E+05 Cs-134 1.59E+07 Cs-137 2.11E+07 Each radionuclide-specific Base Case DCGL 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 per year 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 Base Case DCGLs are reduced based on an expected, or a priori, fraction of the 25 mrem/year dose limit from each source term. The reduced DCGLs, or Operational DCGLs can be related to the Base Case DCGLs 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 Operational DCGL is then used as the DCGL for the FSS design of the survey unit (calculation of surrogate DCGLs, investigations levels, etc.). Details of the Operational DCGLs derived for each dose component and the basis for the applied a priori dose fractions are provided in TSD 17-004. The Operational DCGLB for FSS of the Diesel Fuel Oil Storage Tank Room is provided in Table 3.

Instrument DQOs included a verification of the ability of the survey instrument to detect the radiation(s) of interest relative to the Operational DCGL. The Canberra ISOCS was selected as the primary instrument used to perform FSS of basement surfaces. Response checks were required prior to issuance and after use. Control and accountability of ISOCS units was required to assure data quality.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Table 3 - Operational DCGLs (DCGLB) from LTP Chapter 5, Table 5-4 Turbine Building Radionuclide DCGLB (pCi/m2)

Co-60 5.98E+06 Ni-63 1.85E+08 Sr-90 6.58E+04 Cs-134 1.35E+06 Cs-137 1.79E+06 As part of the DQOs applied to laboratory processes, analysis results were reported as actual calculated results. The actual recorded value was used as the recorded FSS result for measurement and/or sample values that are less than MDC. Negative values were recorded as zero. Results were not reported as less than MDC. Sample report summaries included unique sample identification, analytical method, radionuclide, result, uncertainty, laboratory data qualifiers, units, and the observed MDC.

In accordance with the LTP, for laboratory analysis, MDCs less than 10% of the Operational DCGL were preferable while MDCs up to 50% of the Operational DCGL were acceptable. The maximum acceptable MDC for measurements obtained using field instruments was 50 percent of the applicable Operational DCGL.

5. SURVEY DESIGN Guidance for preparing FSS plans was provided in procedure ZS-LT-300-001-001 Final Status Survey Package Development. The Canberra ISOCS was selected as the primary instrument for performing FSS of basement surfaces. The ISOCS was selected as the instrument of choice to perform FSS of basement surfaces due to the fact that an ISOCS measurement will provide results that can be used directly to determine total activity with depth in concrete and, the surface area covered by a single ISOCS measurement is large (a nominal FOV of 10-30 m2) which essentially eliminates the need for a scan surveys.

In addition, after an ISOCS measurement is collected, it can be tested against a variety of geometry assumptions to address uncertainty in the source term geometry if necessary.

The source term geometry for ISOCS efficiency calibration, i.e., concentration depth profile and areal distribution of the residual radioactivity in structures, is required to generate efficiency curves (i.e., efficiency as a function of energy) for the ISOCS gamma spectroscopy measurements. The basis for the chosen ISOCS efficiency calibrations for the FSS of the Diesel Fuel Oil Storage Tank Rooms concrete are documented in

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 ZionSolutions TSD 14-022. Several different ISOCS geometries were developed for the Diesel Fuel Oil Storage Tank Rooms that ranged from a Field of View (FOV) of 50.3 m2 to a FOV of 7.06 m2. The basis for the selection of this latter geometry was the result of accessibility into open door frames with limited space.

LTP Chapter 5, section 5.5.2.1.1 states that the FSS units for the basements of the Turbine Building, the Crib House/Forebay and the Circulating Water Discharge Tunnels are designated as Class 3. During decommissioning, the primary pathway into and out of the basement of the Auxiliary Building became the Unit 1 and Unit 2 570 foot elevation Diesel Fuel Oil floors. Due to the introduction of radioactive material into both of these areas, they were reclassified as Class 1 survey units in accordance with ZS-LT-300-001-002. Consequently, the weighted average of the judgmental ISOCS measurements will be added to the systematic mean of the Turbine Building Basement FSS. This is addressed in LTP Chapter 5, section 5.5.6.1. In accordance with TSD 14-014, End State Surface Areas Volumes and Source Terms of Ancillary Bldgs, (Reference 10), the total surface area of the Diesel Fuel Oil Storage Tank Room is 813 m2 .

The area-weighted SOF is calculated in accordance with LTP Chapter 5, Equation 5-8, which is reproduced as follows. The SOFBi,B variable in the equation is based on the mean of the judgmental samples.

Equation 1

, = ,

=1 where:

SOFB,B = total surface SOF including all surface survey units in basement (B)

SASUi,B = surface area of survey unit (i) in basement (B)

SAAdjust,B = adjusted surface area for DCGL calculation (Table 5-23) for basement (B)

SOFBi,B = SOFB for survey unit (i) in basement (B)

The sample plan for the Unit 2 Diesel Fuel Oil Storage Tank Room consisted of fifty-one judgmental locations, to capture a 100% of the surface area. Attachment 1, Figures and Maps, illustrates the locations of the ISOCS measurements taken.

The DQO process determined that Co-60, Ni-63, Sr-90, Cs-134, Cs-137 would be the ROC in survey unit #B1-06202AF. During FSS, concentrations for Hard-to-Detect (HTD) ROC Ni-63 and Sr-90 are inferred using a surrogate approach specified in LTP section 5.2.11. Cs-137 is the principle surrogate radionuclide for Sr-90 and Co-60 is the

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 principle surrogate radionuclide for Ni-63. The mean, maximum and 95% Upper Confidence Level (UCL) of the surrogate ratios were calculated in TSD 14-019 and are presented in LTP Chapter 5, Table 5-15, which is reproduced in Table 4 below.

Table 4 - Surrogate Ratios Auxiliary Building Ratios 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 #B1-06202AF, the surrogate Operational DCGLs for Co-60 and Cs-137 are based on the maximum ratios from Table 4.

Equation 1 1

=

1 2 3

+ + +

2 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 Operational DCGLs for the Turbine Building presented in Table 3 and the maximum ratios from Table 4, the following surrogate calculations were performed for FSS Unit #B1-06202AF; Equation 2 1

(137) = = 1.70 + 06 /2 1 0.002

+

1.79 + 06(137) 6.58 + 04(90)

The surrogate Operational DCGL that was used for Cs-137 in FSS Unit ##B1-06202AF for direct comparison of sample results to demonstrate compliance is 1.70E+06 Ci/m2.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Equation 3 1

(60) = = 8.75 + 05 /2 1 180.45

+

5.98 + 06(60) 1.85 + 08(63)

The surrogate Operational DCGL that was used for Co-60 in FSS Unit #B1-06202AF for direct comparison of sample results to demonstrate compliance is 8.75E+05 Ci/m2.

For this Class 3 basement structure survey units the Investigation Levels for ISOCS measurement results are those levels specified in LTP Chapter 5, Table 5-25 and are reproduced below in Table 5.

Table 5 - Investigation Levels Classification Direct Investigation Levels Class 1 >Operational DCGLW In compliance with ZS-LT-01, Quality Assurance Project Plan (QAPP) for Characterization and Final Status Survey (Reference 11), replicate measurements were to be performed on 5% of the static measurement locations.

Table 6 provides a synopsis of the survey design for Survey Unit #B1-06202AF.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Table 6 - Synopsis of the Survey Design FEATURE DESIGN CRITERIA BASIS Survey Unit Area 813 m2 TSD-14-014

  • = 0.3
  • UBGR = SOF of 1
  • LBGR = SOF of 0.5 Number of Static 51 (judgmental) (1)
  • Type I error = 0.05 Measurements
  • Type II error = 0.05
  • / = 3 (adjusted)
  • MARSSIM Table 5-5 100% Areal Coverage Measurement Spacing LTP Chapter 5, Sec. 5.5.2.2 (Planned for 28 m2 FOV)
  • Co 5.98E+06 pCi/m2
  • Cs-134 - 1.35E+06 pCi/m2 Operational DCGLs for Turbine Building Basement OpDCGLB
  • Cs-137 - 1.79E+06 pCi/m2 Unit 2 Diesel Fuel Oil Storage Tank
  • Ni 1.85E+08 pCi/m2 Rooms , (LTP Chapter 5, Table 5-4)
  • Sr 6.58E+04 pCi/m2 2 Concrete Core samples selected for HTD HTD ROC Analysis (LTP Chapter 5, section 5.1)

ROC analysis Measurement

>Operational DCGLW (LTP Chapter 5, Table 5-25)

Investigation Level Scan Survey Area ZS-LT-300-001-001, 813m2 100% areal scan coverage Coverage Attachment 4 QC 5% Duplicate ISOCS Measurements (LTP Chapter 5, section 5.9)

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

6. SURVEY IMPLEMENTATION For the judgmental measurements performed in this Survey Unit #B1-06202AF, compliance with the unrestricted release criteria was demonstrated through a combination of direct measurements using the ISOCS and analysis of concrete core samples obtained from the Diesel Fuel Oil Storage Tank Room. The concrete core data was used to validate the ratios of gamma emitters to HTD ROC.

A walk down was performed by FSS personnel on 05/30/18. A turnover survey was not required to accept the Diesel Fuel Oil Storage Tank Room survey unit for FSS as the implementation of the continuous characterization survey provided sufficient information pertaining to the radiological condition. The continuing characterization surveys included smears for loose surface contamination, 8 concrete core samples and several biased ISOCS measurements in suspect areas. All smear results were less than 1,000 dpm/100 cm2 and all ISOCS measurements indicated sum of fractions (SOF) of less than one when compared against the Operational DCGLs. The Diesel Fuel Oil Storage Tank Room was deemed acceptable for turnover and FSS commenced on 06/01/18.

Field Logs (ZS-LT-300-001-001 Attachment 14) were used to document field activities and other information pertaining to the performance of the FSS. Daily briefings were conducted to discuss the expectations for job performance and to review safety aspects of the job.

ZionSolutions TSD 14-022 provides the initial justification for the selection of reasonably conservative geometries and efficiency calibrations for the ISOCS based on the physical conditions of the remediated surface and the anticipated depth and distribution of activity.

All ISOCS measurements were acquired using approved geometries. Various sources to detector distances were utilized due to space constraints and to ensure 100%

measurement coverage.

The ISOCS detector was positioned horizontal or vertical to the surface at the center-point of each selected measurement location. In most cases, the exposed face of the detector was positioned at a distance of 4 meters from the surface with the 90- degree collimation shield installed; this orientation corresponded to a nominal FOV of 50.3 m2, respectively. As necessary, the detector to source distance and subsequent FOV was reduced to accommodate physical constraints or obstructions while the number of measurements increased to ensure 100% areal coverage was achieved.

The measured activity for each gamma-emitting ROC (and any other gamma emitting radionuclide that was positively detected by ISOCS) was recorded (in units of pCi/m2).

Background was not subtracted from any measurement. A SOF calculation was performed for each measurement by dividing the reported concentration of each ROC by

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 the Operational DCGL for each ROC to derive an individual ROC fraction. The individual ROC fractions were then summed to provide a total SOF value for the measurement.

Three (3) duplicate measurements were taken with the ISOCS on the Diesel Fuel Oil Storage Tank Room concrete during FSS. The locations selected for taking duplicate measurements were at locations 005, 012 and 038. These locations were randomly selected using the Microsoft Excel RANDBETWEEN function. The number of replicate measurements satisfies the requirement that a minimum of 5% percent of the number of measurements that will be used for duplicate samples in accordance with ZSRP-QAPP.

7. SURVEY RESULTS The SOF or unity rule was applied to the data used for the survey planning, data evaluation and statistical tests for basement surfaces since multiple radionuclide-specific measurements were performed and concentrations inferred based on known relationships.

The application of the unity rule served to normalize the data to allow for an accurate comparison of the various data measurements to the release criteria. When the unity rule was applied, the DCGLw (used for the nonparametric statistical test) becomes one (1).

The Base Case basement structure DCGLs (BcDCGLB), was directly analogous to the DCGLW as defined in MARSSIM. The use and application of the unity rule was performed in accordance with section 4.3.3 of MARSSIM.

As previously stated, as the extent of this survey was the acquisition of judgmental measurements at biased locations, compliance was demonstrated by direct comparison of each measurement result to the release criterion. For building surfaces, areas of elevated activity were defined as any area identified by measurement/sample (systematic or judgmental) that exceeded the Operational DCGL but was less than the Base Case DCGL. Any area that exceeded the Base Case DCGL would have required remediation.

This was not the case for the FSS of the Unit 2 Diesel Fuel Oil Storage Room. All measurements taken, when compared against the OpDCGL was less than a SOF of one.

The ISOCS measured concentration results from the Unit 2 Diesel Fuel Oil Storage are listed in Table 7. Table 8 presents the mean concentration of the judgmental measurements and SOF when compared against BcDCGL.

The sample population consisted of fifty-one (51) direct measurements that were acquired using the ISOCS. The concentrations for Ni-63 and Sr-90 are inferred based on the maximum ratios as specified in LTP Chapter 5, Table 5-15. The complete ISOCS gamma spectroscopy reports are presented in Attachment 4.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Table 7 - Unit 2 Diesel Fuel Oil Storage Tank Room- Measured Concentrations of ROC for FSS Co-60 Ni-63(1) Sr-90(1) Cs-134 Cs-137 MEASUREMENT ID SOF(2)

(pCi/m2) (pCi/m2) (pCi/m2) (pCi/m2) (pCi/m2)

B1-06202A-FSFC-001-GD 2.10E+04 3.79E+06 3.30E+01 0.00E+00 1.65E+04 0.0337 B1-06202A-FSFC-002-GD 3.04E+03 5.49E+05 1.41E+01 7.33E+03 7.05E+03 0.0131 B1-06202A-FSFC-003-GD 3.93E+03 7.09E+05 3.76E+01 0.00E+00 1.88E+04 0.0156 B1-06202A-FSFC-004-GD 2.72E+04 4.91E+06 4.48E+01 1.15E+04 2.24E+04 0.0528 B1-06202A-FSFC-005-GD 2.54E+04 4.58E+06 3.34E+01 3.30E+04 1.67E+04 0.0633 B1-06202A-FSFC-006-GD 1.02E+04 1.84E+06 1.52E+01 5.48E+04 7.58E+03 0.0567 B1-06202A-FSFC-007-GD 5.12E+03 9.24E+05 4.94E+00 7.18E+03 2.47E+03 0.0126 B1-06202A-FSFC-008-GD 1.83E+04 3.30E+06 1.22E+02 1.85E+04 6.11E+04 0.0706 B1-06202A-FSFC-009-GD 4.74E+04 8.55E+06 2.16E+02 0.00E+00 1.08E+05 0.1178 B1-06202A-FSFC-010-GD 2.28E+04 4.11E+06 1.46E+01 1.78E+04 7.32E+03 0.0435 B1-06202A-FSFC-011-GD 6.33E+03 1.14E+06 2.46E+01 0.00E+00 1.23E+04 0.0145 B1-06202A-FSFC-012-GD 0.00E+00 0.00E+00 3.98E+01 8.19E+03 1.99E+04 0.0178 B1-06202A-FSFC-013-GD 9.99E+03 1.80E+06 4.52E+01 0.00E+00 2.26E+04 0.0247 B1-06202A-FSFC-014-GD 8.15E+03 1.47E+06 5.54E+01 1.92E+04 2.77E+04 0.0399 B1-06202A-FSFC-015-GD 8.56E+03 1.54E+06 2.48E+01 0.00E+00 1.24E+04 0.0171 B1-06202A-FSFC-016-GD 1.77E+04 3.19E+06 4.70E+01 1.63E+04 2.35E+04 0.0461 B1-06202A-FSFC-017-GD 1.88E+04 3.39E+06 3.78E+01 3.60E+03 1.89E+04 0.0353 B1-06202A-FSFC-018-GD 1.57E+03 2.83E+05 0.00E+00 2.65E+04 0.00E+00 0.0214 B1-06202A-FSFC-019-GD 2.44E+04 4.40E+06 6.44E+01 1.21E+04 3.22E+04 0.0558 B1-06202A-FSFC-020-GD 8.31E+03 1.50E+06 2.96E+01 0.00E+00 1.48E+04 0.0182 B1-06202A-FSFC-021-GD 0.00E+00 0.00E+00 4.76E+01 1.60E+04 2.38E+04 0.0259 B1-06202A-FSFC-022-GD 1.74E+04 3.14E+06 2.60E+01 8.77E+02 1.30E+04 0.0282 B1-06202A-FSFC-023-GD 2.96E+04 5.34E+06 1.63E+01 0.00E+00 8.15E+03 0.0386 B1-06202A-FSFC-024-GD 3.47E+04 6.26E+06 2.04E+02 7.78E+03 1.02E+05 0.1055 B1-06202A-FSFC-025-GD 4.74E+04 8.55E+06 3.12E+02 2.09E+04 1.56E+05 0.1615 B1-06202A-FSFC-026-GD 9.79E+03 1.77E+06 5.50E+01 1.94E+04 2.75E+04 0.0418 B1-06202A-FSFC-027-GD 2.05E+03 3.70E+05 4.14E+01 0.00E+00 2.07E+04 0.0145 B1-06202A-FSFC-028-GD 5.51E+04 9.94E+06 5.02E+02 2.31E+04 2.51E+05 0.2279 B1-06202A-FSWC-029-GD 2.16E+04 3.90E+06 5.90E+01 4.08E+04 2.95E+04 0.0723 B1-06202A-FSWC-030-GD 1.84E+04 3.32E+06 3.20E+01 3.23E+04 1.60E+04 0.0544 B1-06202A-FSWC-031-GD 1.40E+04 2.53E+06 3.66E+01 3.62E+04 1.83E+04 0.0536 B1-06202A-FSWC-032-GD 7.41E+03 1.34E+06 0.00E+00 0.00E+00 0.00E+00 0.0085 B1-06202A-FSWC-033-GD 1.91E+04 3.45E+06 2.34E+01 1.33E+04 1.17E+04 0.0386 B1-06202A-FSWC-034-GD 2.77E+03 5.00E+05 1.30E+01 2.02E+02 6.51E+03 0.0071 B1-06202A-FSWC-035-GD 4.88E+03 8.81E+05 0.00E+00 0.00E+00 0.00E+00 0.0056 B1-06202A-FSWC-036-GD 5.29E+03 9.55E+05 0.00E+00 1.48E+04 0.00E+00 0.0170

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Table 7 (continued) - Unit 2 Diesel Fuel Oil Storage Tank Room- Measured Concentrations of ROC for FSS Co-60 Ni-63(1) Sr-90(1) Cs-134 Cs-137 MEASUREMENT ID SOF(2)

(pCi/m2) (pCi/m2) (pCi/m2) (pCi/m2) (pCi/m2)

B1-06202A-FSWC-037-GD 2.29E+02 4.13E+04 0.00E+00 0.00E+00 0.00E+00 0.0003 B1-06202A-FSWC-038-GD 1.09E+04 1.97E+06 1.75E+02 1.28E+04 8.73E+04 0.0734 B1-06202A-FSWC-039-GD 1.19E+04 2.15E+06 4.56E+01 6.52E+03 2.28E+04 0.0319 B1-06202A-FSWC-040-GD 7.02E+03 1.27E+06 2.84E+01 1.85E+03 1.42E+04 0.0178 B1-06202A-FSWC-041-GD 5.67E+03 1.02E+06 4.68E+01 1.36E+04 2.34E+04 0.0303 B1-06202A-FSWC-042-GD 6.86E+03 1.24E+06 5.90E+01 1.66E+04 2.95E+04 0.0375 B1-06202A-FSWC-043-GD 1.79E+04 3.23E+06 6.50E+01 6.32E+02 3.25E+04 0.0401 B1-06202A-FSWC-044-GD 1.18E+04 2.13E+06 1.67E+01 3.88E+04 8.35E+03 0.0471 B1-06202A-FSWC-045-GD 1.88E+04 3.39E+06 1.88E+01 1.30E+04 9.38E+03 0.0366 B1-06202A-FSWC-046-GD 6.86E+03 1.24E+06 1.94E+01 0.00E+00 9.71E+03 0.0136 B1-06202A-FSWC-047-GD 1.04E+04 1.88E+06 2.75E+01 0.00E+00 1.38E+04 0.0200 B1-06202A-FSWC-048-GD 2.35E+04 4.24E+06 3.52E+01 2.88E+04 1.76E+04 0.0586 B1-06202A-FSWC-049-GD 3.12E+04 5.63E+06 9.02E+01 4.13E+03 4.51E+04 0.0653 B1-06202A-FSWC-050-GD 1.65E+04 2.98E+06 4.92E+01 1.71E+03 2.46E+04 0.0346 B1-06202A-FSWC-051-GD 1.29E+04 2.33E+06 0.00E+00 1.66E+03 0.00E+00 0.0160 Min 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.0003 Median 1.18E+04 2.13E+06 3.52E+01 7.78E+03 1.76E+04 0.0353 Maximum 5.51E+04 9.94E+06 5.02E+02 5.48E+04 2.51E+05 0.2279 STDEV 1.24E+04 2.23E+06 8.67E+01 1.32E+04 4.34E+04 0.0398 Skew 1.36E+00 1.36E+00 3.53E+00 1.23E+00 3.53E+00 2.7100 (1) Inferred concentration (2) Compared against OpDCGL Direct measurement locations were denoted on the concrete surfaces of the Diesel Fuel Oil Storage Tank Room by marking an approximate 4 meter by 4 meter grid pattern using a random start point that was overlaid over the exposed surface, providing sufficient overlap between locations to ensure 100% areal coverage. ISOCS measurement locations are shown below in Figure 1 as well as in Attachment 1.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Figure 1 - Diesel Fuel Oil Storage Tank Room

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Table 8 - Diesel Fuel Oil Storage Tank Room Statistical Quantities INDIVIDUAL MEASUREMENT METRICS Total Number of Judgmental Measurements = 51 Number of Quality Control Measurements = 3 Total Number of Measurements = 54 Mean Measurement SOF = 0.0430 Max Judgmental Measurement SOF = 0.2279 Number of Judgmental Measurements with SOF > = 1 = 0 STATISTICAL QUANTITIES AVG MEAN MEDIAN MAX MIN BcDCGL AVG DOSE ROC SOF PER PER 2

(pCi/m ) 2 (pCi/m ) 2 (pCi/m ) (pCi/m )2 (pCi/m2) ROC ROC Co-60 1.51E+04 1.18E+04 5.51E+04 0.00E+00 1.24E+04 7.03E+07 0.0002 0.0054 Ni-63 2.72E+06 2.13E+06 9.94E+06 0.00E+00 2.23E+06 2.18E+09 0.0012 0.0312 Sr-90 5.78E+01 3.52E+01 5.02E+02 0.00E+00 8.67E+01 7.74E+05 0.0001 0.0019 Cs-134 1.18E+04 7.78E+03 5.48E+04 0.00E+00 1.32E+04 1.59E+07 0.0007 0.0186 Cs-137 2.89E+04 1.76E+04 2.51E+05 0.00E+00 4.34E+04 2.11E+07 0.0014 0.0343 Mean SOF for Survey Unit = 0.0037 Dose (based on Mean SOF) = 0.0913 mrem/yr The implementation of required QC measures included the collection of 3 additional ISOCS measurements in the Diesel Fuel Oil Storage Tank Room for replicate measurement analysis. The concentrations for Ni-63 and Sr-90 are inferred based on the maximum ratios as specified in LTP Chapter 5, Table 5-15. The replicate ISOCS measurement results are provided in Table 9.

Table 9 - Summary of ISOCS Replicate Measurements for QC Co-60 Ni-63(1) Sr-90(1) Cs-134 Cs-137 MEASUREMENT ID SOF(2)

(pCi/m ) (pCi/m ) (pCi/m2) (pCi/m2) (pCi/m2) 2 2 B106202A-FQFC-005-GD 1.40E+04 2.53E+06 0.00E+00 1.95E+04 0.00E+00 0.03044 B106202A-FQFC-012-GD 1.89E+04 3.41E+06 4.30E+01 9.07E+03 2.15E+04 0.04098 B106202A-FQFC-038-GD 0.00E+00 0.00E+00 1.22E+01 1.10E+04 6.12E+03 0.01175 (1) Inferred concentration (2) Compared against OpDCGL Five (5) concrete core samples were acquired at 10% of the locations where an ISOCS measurement was collected with the locations selected at random. Only HTD radionuclides included as ROC (Ni-63 and Sr-90) were analyzed in the FSS confirmatory samples. The top 1/2 inch puck from each of the five concrete core samples, representing

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 the concrete from the exposed surface to a depth of 1/2 inch was analyzed by the on-site gamma spectroscopy system. Of the five samples, only two samples indicated plant derived radionuclides at concentrations greater than MDC. These two samples were sent to Eberline Laboratory for analysis of HTD ROC (Ni-63 and Sr-90). The analysis results indicated no detectable activity for any of the ROC at concentrations greater than MDC.

No further action or analysis was performed. The results of the Eberline analysis are presented in Table 10 below.

Table 10 - Summary of FSS Concrete Core Analysis by Eberline B1-06202A-FSFC-016-CV ROC Result Uncertainty MDC (pCi/g) (pCi/g) (pCi/g)

Co-60 9.14E-03 8.12E-02 1.12E-01 Ni-63 0.00E+00 1.12E+00 1.93E+00 Sr-90 5.45E-01 3.79E-01 6.09E-01 Cs-134 0.00E+00 4.78E-02 1.40E-01 Cs-137 3.58E-01 1.21E-01 1.48E-01 B1-06202A-FSWC-035-CV ROC Result Uncertainty MDC (pCi/g) (pCi/g) (pCi/g)

Co-60 4.45E-02 7.80E-02 1.17E-01 Ni-63 0.00E+00 1.22E+00 2.10E+00 Sr-90 1.93E-02 5.27E-01 9.40E-01 Cs-134 0.00E+00 3.64E-02 1.16E-01 Cs-137 1.74E-02 1.05E-01 1.65E-01

8. QUALITY CONTROL The implementation of required QC measures included the collection of three additional ISOCS measurements in (Survey Unit #B1-06202AF) for replicate measurement analysis. The complete ISOCS gamma spectroscopy reports for the duplicate measurements are presented in Attachment 4. All duplicate ISOCS measurements met the required acceptance criteria. The completed Duplicate Sample Assessment Forms are included in Attachment 2 of this Release Record.
9. INVESTIGATION AND RESULTS No measurements were taken for an investigation during the performance of FSS in this survey unit.
10. REMEDIATION AND RESULTS No remediation was required prior to performance of FSS.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

11. CHANGES FROM THE FINAL STATUS SURVEY PLAN There were no addendums to the FSS plan, however, there were changes to the ISOCS survey plans as noted earlier in this Release Record. Those changes were required due to constraints on placement of ISOCS detectors that were not obvious when the FSS plan was first written. The changes in ISOCS measurement locations were made to ensure 100% areal coverage of the survey unit.
12. DATA QUALITY ASSESSMENT (DQA)

In accordance with procedure ZS-LT-300-001-004, Final Status Survey Data Assessment (Reference 12), the DQOs, sample design, and data were reviewed for completeness, accuracy, and consistency. Documentation was complete and legible. The FSS unit was properly classified as Class 1. All measurement results were individually reviewed and validated. The FOV for the number of measurements taken was sufficient to meet the requirement of 5% areal coverage of surfaces for a Class 3 survey unit. The instrumentation used to perform the FSS were in calibration, capable of detecting the activity with an adequate MDC and successfully response checked prior to and following use. An adequate number of replicate measurements were taken and the results meet the acceptance criteria as specified in the QAPP.

The analytical results of the 51 judgmental measurements were less than a SOF of one when directly compared against the OpDCGL.

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

mean, median, standard deviation). All data was considered valid and the values reported below the MDC, and values with uncertainties that exceeded two standard deviations.

13. ANOMALIES No anomalies were observed during the performance or analyses of the survey.
14. CONCLUSION Fifty-one (51) judgmental measurements were taken in Unit 2 Diesel Fuel Oil Storage Tank Room. The FOV of each measurement included the floor and three walls. The total surface area is 813 m2. The FOV for the Circular Plan geometry used for the majority of the ISOCS measurements was 28 m2, which equated to an areal coverage 100% of the surface area of the remaining Diesel Fuel Oil Storage Tank Room.

All of the measurements were below a SOF of one, when compared to the OpDCGLB.

The mean BcSOF for the survey unit was 0.0037. The requirements for a Class 1 survey unit have been met.

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 The calculated dose from the mean ROC concentrations detected by these judgmental measurements is 0.0913 mrem/yr.

Survey Unit #B1-06202AF 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, Revision 1, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)
5. ZionSolutions TSD 14-022 Revision 2, Use of In-Situ Gamma Spectroscopy for Source Term Survey of End State Structures
6. ZionSolutions TSD 17-004, Operational Derived Concentration Guideline Levels for Final Status Survey
7. ZionSolutions procedure ZS-LT-300-001-002, Survey Unit Classification
8. Zion Station Historical Site Assessment (HSA)
9. ZionSolutions TSD 11-001, Potential Radionuclides of Concern during the Decommissioning of Zion Station
10. ZionSolutions TSD 14-014, End State Surface Areas Volumes and Source Terms of Ancillary Bldgs
11. ZionSolutions procedure ZS-LT-01, Quality Assurance Project Plan (QAPP) for Characterization and Final Status Survey
12. ZionSolutions procedure ZS-LT-300-001-004, Final Status Survey Data Assessment

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

16. ATTACHMENTS Attachment 1 - Figure and Maps Attachment 2 - ISOCS Geometry Attachment 3 - QC Measurement Assessment Attachment 4 - Eberline Report Attachment 5 - ISOCS Analytical Reports

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 ATTACHMENT 1, FIGURES AND MAPS

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Figure 1 - Overview of Structural Survey Unit Auxiliary Building Unit 2- 570 ft. elevation Unit 1 -570ft. elevation Diesel Fuel Oil Storage Diesel Fuel Oil Storage Tank Room Tank Room North

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 ATTACHMENT 2, ISOCS GEOMETRY

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 ATTACHMENT 3, QC MEASUREMENT ASSESSMENTS

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Replicate Measurement Assessment Survey Area #: 6200 Survey Unit # 06202 Survey Unit Name: Diesel Fuel Oil Storage Room Unit 2 Sample Plan#: B1-006202A-F Sample

Description:

Comparison of systematic and QC ISOCS measurements of concrete wall at GRID # 5. The standard measurement is ID as B1-06202AF-SFC-005-GD. The comparison measurement is ID as B1-06202AF-QFC-005-GD STANDARD COMPARISON Activity Activity Standard Agreement Standard Comparison Acceptable Radionuclide Value Resolution Value Error Range Error Ratio (Y/N)

(pCi/m2) (pCi/m2)

K-40 1.19E+06 2.77E+05 4 0.5-2.0 1.00E+06 2.56E+05 1.2 Y Comments/Corrective Actions: None Table is provided to show acceptance criteria used to assess split samples.

Performed by: Patsy Giza Date: Reveiwed by: Date:

6/21/2018 6/21/2018

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Duplicate Sample Assessment Form Survey Area #: 6200 Survey Unit # 06202 Survey Unit Name: Diesel Fuel Oil Storage Room Unit 2 Sample Plan#: B1-06202A-F Sample

Description:

Comparison of systematic and QC ISOCS measurements of concrete wall at GRID #12. The standard measurement is ID as B1-06202AF-SFC-012-GD. The comparison measurement is ID as B1-06202AF-QFC-012-GD STANDARD COMPARISON Activity Standard Agreement Activity Standard Comparison Acceptable Radionuclide Resolution Value Error Range Value Error Ratio (Y/N)

K-40 1.04E+06 2.40E+05 4 0.5-2.0 9.24E+05 2.64E+05 1.1 Y Comments/Corrective Actions: None Table is provided to show acceptance criteria used to assess split samples.

Performed by: Patsy Giza Date: Reveiwed by: Date:

6/21/2018 6/21/2018

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 Duplicate Sample Assessment Form Survey Area #: 6200 Survey Unit # 06202 Survey Unit Name: Diesel Fuel Oil Storage Unit 2 Sample Plan#: B1-06202A-F Sample

Description:

Comparison of systematic and QC ISOCS measurements of concrete wall at GRID #38. The standard measurement is ID as B1-06202AF-SWC-038-GD. The comparison measurement is ID as B1-06202AF-QWC-038-GD STANDARD COMPARISON Activity Standard Agreement Activity Standard Comparison Acceptable Radionuclide Resolution Value Error Range Value Error Ratio (Y/N)

K-40 9.88E+05 2.49E+05 4 0.4-2.5 1.13E+06 2.60E+05 0.9 Y Comments/Corrective Actions: None Table is provided to show acceptance criteria used to assess split samples.

Performed by: Patsy Giza Date: Reveiwed by: R.D. Decker Date:

11/12/2018 11/12/2018

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 ATTACHMENT 4, EBERLINE REPORT

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FSS RELEASE RECORD UNIT 2 DIESEL FUEL OIL STORAGE TANK ROOM SURVEY UNIT 06202 ATTACHMENT 5, ISOCS ANALYTICAL REPORTS

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