ML19338B785

From kanterella
Jump to navigation Jump to search
Restoration Project Final Status Survey Release Record 00101F, Diesel Generator Heat Exchangers Service Water Supply and Service Water Return Buried Pipe
ML19338B785
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 11/23/2019
From: Massengill R
ZionSolutions
To:
Office of Nuclear Material Safety and Safeguards
References
ZS-2019-0101
Download: ML19338B785 (35)
v • d • e


Text

ZION STATION RESTORATION PROJECT FINAL STATUS SURVEY RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F PREPARED BY / DATE: R. Massengill 2019-11-23 Radiological Engineer REVIEWED BY / DATE: P. Giza 2019-11-23 Radiological Engineer APPROVED BY / DATE: D. Wojtkowiak 2019-11-23 C/LT Manager

[2]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F TABLE OF CONTENTS

1. EXECUTIVE

SUMMARY

................................................................................................... 5

2. SURVEY UNIT DESCRIPTION ......................................................................................... 6
3. CLASSIFICATION BASIS .................................................................................................. 6
4. DATA QUALITY OBJECTIVES ........................................................................................ 7
5. SURVEY DESIGN ................................................................................................................ 9
6. SURVEY IMPLEMENTATION........................................................................................ 12
7. SURVEY RESULTS............................................................................................................ 13
8. QUALITY CONTROL ....................................................................................................... 16
9. INVESTIGATIONS AND RESULTS ............................................................................... 16
10. REMEDIATION AND RESULTS ..................................................................................... 16
11. CHANGES FROM THE SURVEY PLAN ....................................................................... 16
12. DATA QUALITY ASSESSMENT ..................................................................................... 16
13. ANOMALIES....................................................................................................................... 17
14. CONCLUSION .................................................................................................................... 17
15. REFERENCES .................................................................................................................... 17
16. ATTACHMENTS ................................................................................................................ 18 ATTACHMENT 1 - 12 INCH SERVICE WATER SUPPLY HEADERS ........................................ 19 ATTACHMENT 2 - SAMPLE DATA ....................................................................................... 21 ATTACHMENT 3 - SIGN TEST ............................................................................................. 29 ATTACHMENT 4 - QC DATA .............................................................................................. 34 List of Tables Table 1 - Dose Significant Radionuclides and Mixture ............................................................................... 8 Table 2 - Base Case and Operational DCGLs for Buried Pipe .................................................................... 9 Table 3 - Surrogate Ratios .......................................................................................................................... 10 Table 4 - Surrogate Base Case and Operational DCGLs ........................................................................... 10 Table 5 - Synopsis of Survey Design ......................................................................................................... 12 Table 6 - Diesel Generator Service Water Supply - Statistical Quantities Systematic Measurement Population .......................................................................................... 15

[3]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F LIST OF ACRONYMS AND ABBREVIATIONS ALARA As Low As Reasonably Achievable AMCG Average Member of the Critical Group BcDCGL Base Case Derived Concentration Guideline Level BcSOF Base Case Sum of Fractions DQO Data Quality Objective DCGL Derived Concentration Guideline Level FOV Field of View FSS Final Status Survey HTD Hard-to-Detect ID Internal Diameter LTP License Termination Plan MARSSIM Multi-Agency Radiation Survey and Site Investigation Manual MDC Minimum Detectable Concentration NaI Sodium Iodide OpDCGL Operational Derived Concentration Guideline Level OpSOF Operational Sum of Fractions QAPP Quality Assurance Project Plan QC Quality Control ROC Radionuclides of Concern SOF Sum of Fractions TEDE Total Effective Dose Equivalent UCL Upper Confidence Level ZNPS Zion Nuclear Power Station ZSRP Zion Station Restoration Project

[4]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F

1. EXECUTIVE

SUMMARY

This Final Status Survey (FSS) Release Record for survey unit 00101F, the Diesel Generator Heat Exchangers Service Water Supply and Service Water Return Buried Pipe (pipe nos.

AO-27, AO-28, AO-30, and AO-31) and Service Water Return buried pipe (pipe nos. TO-32 and TO-33), has been generated for the Zion Station Restoration Project (ZSRP). The release record was developed 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).

FSS Sample Plan S3-00101AF Plan 6 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).

Prior to the completion of this FSS, the survey unit numbers for the eight (8) buried pipe survey units listed in the Attachment 4, Survey Units for Structures from ZionSolutions procedure ZS-LT-300-001-002, Survey Unit Classification (Reference 5), were changed. The eight (8) different piping systems for survey unit 00101A were changed to 00101A through 00101H to allow for a clear distinction between these pipes in the FSS Database. The Diesel Generator Heat Exchanger Service Water Supply and Return piping was given the 00101F survey unit number.

The Diesel Generator Heat Exchanger Service Water Supply piping consisted of four (4) lengths of 12-inch internal diameter (ID) pipe that totaled approximately 304.4 feet in length (pipe nos. AO-27, AO-28, AO-30, and AO-31). The Diesel Generator Heat Exchanger Service Water Return buried piping consisted of two lengths of 15-inch ID pipe (pipe nos. TO-32 and TO-33) that traversed 367.2 linear feet under the Turbine Building basement pad.

Final Status Survey was conducted to demonstrate that the concentrations of residual radioactivity are equal to or below site-specific Derived Concentration Guideline Levels (DCGL) corresponding to the dose criterion in 10 CFR 20.1402 Radiological Criteria for Unrestricted Use. The Diesel Generator Heat Exchanger Service Water Supply and Return piping (pipe nos. AO-27, AO-28, AO-30, AO-31, TO-32 and TO-33) were classified as MARSSIM Class 3 as described in with Attachment F of TSD 14-016, Description of Embedded Piping, Penetrations, and Buried Pipe to Remain in Zion End State (Reference 6).

The Diesel Generator Heat Exchanger Service Water Supply pipes were surveyed with a Ludlum Model 2350-1 Data Logger paired with a Ludlum Model 44-10 Sodium/Iodide (NaI) gamma detector calibrated for a Cs-137 energy window. One-minute static measurements were taken to quantify the activity in the pipe. Each measurement of the 12-inch ID piping had a calculated Field of View (FOV) of 3.14 ft2 (2,919 cm2). The total length of the piping included

[5]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F in this survey unit was 304.4 linear feet. The Service Water Return buried piping was not accessible at the time the survey was performed due to unmitigated groundwater intrusion into the pipe. However, the Service Water Return piping was part of the same system as the Service Water Supply piping and therefore, the radiological conditions in the Supply piping were considered to be radiologically representative of the entire piping system interior, including the Service Water Return buried piping.

For the FSS of the Diesel Generator Heat Exchanger Service Water Supply piping, a total of 256 measurements were obtained. All of the readings were below an Operational Sum of Fractions (OpSOF) of 0.5 when compared against the Operational DCGL for buried pipe (OpDCGLBP) with the mean OpSOF result of 0.144. The mean Base Case SOF (BcSOF),

when compared to the Base Case DCGL for buried pipe (BcDCGLBP) was 0.037, which results in the dose calculated for this survey unit of 0.922 mrem/yr.

2. SURVEY UNIT DESCRIPTION The Diesel Generator Heat Exchanger Service Water Supply piping consists of 12-inch ID pipe that is 304.4 linear feet in length, which equates to a surface area of 88.8 m2. The piping consists of 4 sections: for Unit 1, AO-30 (74.5 feet) and AO-31 (77.7 feet), and for Unit 2, AO-27 (74.5 feet) and AO-28 (77.7 feet). The openings for these pipe sections are on the Diesel Generator Room floor (i.e. 567 foot elevation), and on the north and south walls of the Auxiliary Building (i.e. 553 foot and 554 foot elevation respectively).

The Diesel Generator Heat Exchanger Service Water Return buried piping consisted of two (2) sections of 15-inch ID pipe that ran 367.2 linear feet under the Turbine Building basement pad (pipe nos. TO-32 and TO-33). The pipes were cut on the floor opening thus exposing both pipes to groundwater intrusion. At the time of FSS, the Return sections of this pipe were determined to be obstructed by unmitigated groundwater intrusion. Consequently, the measurements taken in the unobstructed sections (pipe nos. AO-27, AO-28, AO-30, and AO-

31) were deemed as representative of the entire pipe length in the system. The total length of piping in this survey unit was 671.6 linear feet (204.7 meters). A view of supply piping is included in Attachment 1.
3. CLASSIFICATION BASIS Survey unit 00101F was classified as Class 3 in accordance with Attachment F of TSD 14-016 and from information taken from the Zion Station Historical Site Assessment (Reference 7).

During the FSS of the Turbine Building and Crib House basements, radiological surveys were performed in several sections of Service Water Piping associated with the Circulating Water Intake Pipe and Circulating Water Discharge Tunnels. No plant-derived radionuclides were positively identified during the performance of these surveys. Radiological surveys were also

[6]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F performed to support the segmentation and removal of Condensate and Service Water pipe that was connected to the sections of end-state buried pipe. No gross radioactivity greater than background was identified during the scanning performed as part of those surveys.

The Survey Unit Classification Basis for final classification, included a review of the historical information, the results of the survey data and, completion of a final Survey Unit Classification Worksheet. It was concluded that there was a low probability for the presence of residual radioactivity in these pipes in concentrations greater than 50% of the OpDCGLs, justifying a FSS unit classification of Class 3.

4. DATA QUALITY OBJECTIVES 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 objective of the survey is satisfied. The DQO process is described in the ZSRP LTP in accordance with MARSSIM. The appropriate design for a given survey will be 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 survey unit 00101F 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).

The residual radioactivity in buried piping located below the 588 foot grade that will remain and be subjected to FSS is discussed in LTP Chapter 2, section 2.3.3.7 and TSD 14-016. The dose assessment methods and resulting DCGLs for buried piping are described in detail in TSD 14-015, Buried Pipe Dose Modeling & DCGLs (Reference 8) and LTP Chapter 6, section 6.12.

ZionSolutions TSD 11-001, Technical Support Document for Potential Radionuclides of Concern During the Decommissioning of the Zion Station (Reference 9) established the basis for an initial suite of potential radionuclides of concern (ROC) for the decommissioning of the

[7]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Zion Nuclear Power Station (ZNPS). LTP Chapter 2 provides detailed characterization data that described contamination levels in the Containments and Auxiliary Building, which were the primary source of radioactive contaminants. ZionSolutions TSD 14-019, Radionuclides of Concern for Soil and Basement Fill Model Source Terms (Reference 10) evaluates the results of the concrete core analysis data from the Containments and Auxiliary Building and refines the initial suite of potential ROC by evaluating the dose significance of each radionuclide.

The final ROC for the decommissioning of Zion are Co-60, Cs-134 and Cs-137 (as well as Eu-152 and Eu-154 for Containment), which are gamma emitters, and Ni-63, Sr-90 and H-3 (applicable only to Containment), which are Hard-to-Detect (HTD) radionuclides. LTP section 5.1 states that HTD concentrations will be inferred using a surrogate approach and the maximum ratios from LTP Chapter 5, Table 5-15 unless area-specific ratios as determined by actual survey data are used in lieu of the maximum ratios.

LTP Chapter 6, section 6.5.2 discusses the process used to derive the ROC for the decommissioning of the ZNPS, including the elimination of insignificant dose contributors from the initial suite consistent with the guidance in Section 3.3 of NUREG-1757 Consolidated Decommissioning Guidance. Based upon the analysis of the Auxiliary Building radionuclide mixture in TSD 14-019, Table 19, it was determined that Co-60, Ni-63, Sr-90, Cs-134 and Cs-137 accounted for 99.5% of all dose in the contaminated concrete mixes.

Table 1 presents the ROC for the decommissioning of Auxiliary Building structural surfaces and the normalized mixture 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.

At ZNPS, compliance is demonstrated through the summation of dose from four distinct source terms for the end-state (basements, soils, buried pipe and groundwater). Each radionuclide-specific BcDCGL 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/year or less after all FSS is completed,

[8]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F the BcDCGLs 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 BcDCGLs 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 OpDCGL is then used as the DCGL for the FSS design of the survey unit (calculation of surrogate DCGLs, investigations levels, etc.). Details of the OpDCGLs 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).

The Base Case and Operational DCGLs for Buried Pipe are listed in Tables 5-9 and 5-10 of the LTP, and are reproduced in Table 2.

Table 2 - Base Case and Operational DCGLs for Buried Pipe Base Case Operational Radionuclide Buried Pipe DCGL Buried Pipe DCGL dpm/100cm2 dpm/100cm2 Co-60 2.64E+04 6.76E+03 Cs-134 4.54E+04 1.16+E04 Cs-137 1.01E+05 2.59E+04 Ni-63 4.89E+07 1.25E+07 Sr-90 4.50E+04 1.15E+04

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.

The DQO process determined that Co-60, Ni-63, Sr-90, Cs-134 and Cs-137 would be the ROC in survey unit 00101F. During FSS, concentrations for 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 and 95% Upper Confidence Level (UCL) of the surrogate ratios for concrete core samples taken in the Auxiliary Building basement were calculated in ZionSolutions TSD 14-019, and are presented in Table 3. The maximum ratios will be used in the surrogate calculations during this FSS.

The results of the surrogate calculations are listed in Table 4.

[9]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Table 3 - 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 Table 4 - Surrogate Base Case and Operational DCGLs Base Case Operational Radionuclide Buried Pipe DCGL Buried Pipe DCGL dpm/100cm2 dpm/100cm2 Co-60 2.41E+04 6.16E+03 Cs-134 4.54E+04 1.16E+04 Cs-137 1.01E+05 2.58E+04 An adjusted gross gamma OpDCGL was also calculated by applying the normalized gamma mixture from Table 1 to the surrogate OpDCGL for Co-60, the surrogate OpDCGL for Cs-137 and the OpDCGL for Cs-134 from Table 3. The adjusted gross gamma OpDCGL for buried pipe was 2.49E+04 dpm/100 cm2.

The Diesel Generator Heat Exchanger Service Water Supply piping is Class 3 buried pipe.

Consequently, a minimum of 1% to 10% areal surface coverage was required. For the survey of pipe internal surfaces, areal coverage is achieved by the area of detection for each static measurement taken. Scanning, in the traditional context, is not applicable to the survey of pipe internal surfaces. For the survey of these pipes, the pipe detector was calibrated for the specific geometry of the 12-inch ID Service Water pipes. The most likely geometry for activity in this pipe is for the activity to be collected in the bottom of the pipe. To obtain an efficiency for this geometry, a mock-up of the inner diameter of this pipe was created. The conformal source was positioned inside of the mockup covering 100% of the interior diameter of the pipe and the calibration readings obtained. For the survey of these pipes, the pipe detector was calibrated for the specific geometry of the 12-inch ID Service Water pipes. This geometry covers a FOV of 3.14 ft2. The total internal surface area of the pipes is 956.3 ft2 or 228.08 m2; therefore a minimum of 31 measurements was required to meet an areal surface coverage of 10%.

The initial survey design called for the use of a Ludlum Model 44-162 NaI detector. Initially, background radiation was not subtracted from the readings. The survey commenced as designed and upon insertion of the Ludlum Model 44-162 into the pipe, the gross activity readings were greater than the Action Level calculated for this pipe. In order to minimize the effect of background on the measurements taken in the pipe, a Ludlum Model 44-10, 2 inch x

[10]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F 2 inch NaI detector was calibrated and windowed to the Cs-137 energy. An efficiency was then derived for this detector in the geometry described above. Because the initial survey of the pipe with the Ludlum Model 44-162 indicated possible measurements with results exceeding 50% of the OpDCGL, it was decided to survey 100% of the accessible area of the pipe, with a measurement taken at 1-foot intervals.

FSS investigation levels are specified in LTP Chapter 5, section 5.6.4.6, Table 5-25. If a direct measurement for a Class 3 embedded pipe exceeded 50% of the OpDCGL, then an investigation was required. The gross gamma OpDCGL calculated in survey design was 2.49E+04 dpm/100 cm2. Since the detector used for this survey was set to detect activity for a single nuclide, Cs-137, a second surrogate calculation was performed using Cs-137 as the surrogate nuclide for Cs-134 and Co-60. This calculation resulted in a gross gamma activity of 2.45E+04 dpm/100 cm2. Fifty percent of this value is 1.23E+04 dpm/100 cm2. Using the efficiency derived for the Ludlum Model 44-10 detector and assuming a FOV of 3.14 ft2, this equated to approximately 520 gross cpm for the instrument/detector combination described.

This was the Action Level used for the FSS of survey unit 00101F.

In compliance with ZS-LT-01, Quality Assurance Project Plan (for Characterization and FSS) (Reference 12), replicate measurements were to be performed on 5% of the static measurement locations. Table 5 provides a synopsis of the survey design for FSS unit 00101F.

[11]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Table 5 - Synopsis of Survey Design FEATURE DESIGN CRITERIA BASIS 1 ft (12-inch ID) x 304.4 feet Survey Unit Area 956.3 ft2 (length) x Number of Static 31 10% areal coverage, Class 3 Measurements Measurement As needed to obtain sufficient 10% areal coverage, Class 3 Spacing measurements for 10% areal coverage

  • Co 6.76E+03 dpm/100 cm2
  • Cs-134 - 1.16E+04 dpm/100 cm2 OpDCGLs for Buried Pipe, DCGLs
  • Cs-137 -2.59E+04 dpm/100 cm2 (LTP Chapter 5, Table 5-10)
  • Ni-63 -1.25E+07 dpm/100 cm2
  • Sr 1.15E+04 dpm/100 cm2 Gross Gamma DCGL adjusted for HTD HTD ROC Analysis LTP 5.7.1.9 based on the isotopic mixture Measurement

>0.5 Gross Gamma OpDCGL (LTP Chapter 5, Table 5-25)

Investigation Level Scan Survey Area N/A LTP 5.7.1.9 Coverage Replicate measurements were performed Quality Control Quality Assurance Project Plan on 5% of the static measurement (QC) (QAPP) locations

6. SURVEY IMPLEMENTATION Survey instructions for this FSS were incorporated into and performed in accordance with FSS Sample Plan S300101A, Plan 6, which was developed in accordance with ZionSolutions procedure ZS-LT-300-001-001. The FSS unit was inspected and controlled in accordance with ZionSolutions procedure ZS-LT-300-001-003, Isolation and Control for Final Status Survey (Reference 13).

Inspections of the pipe were performed with a SeeSnake pipe camera prior to the start of the survey. The SeeSnake was inserted into each of the pipes from the 567 foot elevation on the Diesel Generator room floor, and from the Auxiliary Building basement 542 foot elevation, through the two (2) pipe openings on the north/south walls at 553 foot and 554 foot elevations.

[12]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F From the 567 foot, the SeeSnake was able to access approximately 25 feet of the pipe, and from the Auxiliary Building basement, approximately 40 feet of pipe was accessible.

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 14). The Daily Operational Response Check compared the background response and the response to check sources ranges established for normal background with the detector source response to ensure that the detector was working properly. After the surveys were performed on June 13 and June 14, 2018, an electronic malfunction occurred with the download function of the Ludlum Model 2350-1 which prevented the instrument from connecting with the computer and downloading the stored data. As the instrument/detector combination successfully passed the post-use operational checks, the data that was manually-recorded during the performance of the survey was used to document the survey results.

On June 13, 2018, pipe sections AO-27 and AO-28 were surveyed from the Auxiliary Building.

For pipe AO-27, thirty-six (36) measurements were collected, and for pipe AO-28, thirty-eight (38) measurements were collected.

On June 14, 2018, pipe sections AO-30 and AO-31 were surveyed from the Auxiliary Building.

For pipe AO-30, thirty-eight (38) measurements were collected, and for pipe AO-31, forty (40) measurements were collected.

On June 18, 2018, surveys were performed on all four (4) pipes from the Diesel Generator room floor at 567 foot elevation. Twenty-six (26) measurements were collected in each of the four (4) pipes.

7. SURVEY RESULTS The SOF or unity rule is applied to the data used for the survey planning, data evaluation and statistical tests for basement surfaces since multiple radionuclide-specific measurements will be performed or the concentrations inferred based on known relationships. The application of the unity rule serves to normalize the data to allow for an accurate comparison of the various data measurements to the release criteria. When the unity rule is applied, the DCGLW (used for the nonparametric statistical test) becomes one (1). The BcDCGLB are directly analogous to the

[13]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F 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 described in LTP Chapter 5, section 5.10.3.2, the Sign Test was used to evaluate the measured residual radioactivity against the dose criterion. The OpSOF for each measurement was used as the sum value for the Sign Test. The Sign Test then demonstrated that the mean activity for each ROC was less than the OpDCGLB at a Type I decision error of 0.05.

For buried pipe, areas of elevated activity were defined as any area identified by measurement (systematic or judgmental) that exceeded the OpDCGL but was less than the BcDCGL. Any area that exceeded the BcDCGL would have required remediation. The OpSOF for a systematic or a judgmental measurement/sample(s) could exceed one without remediation as long as the survey unit passed the Sign Test and, the mean OpSOF for the survey unit did not exceed one. Once the survey data set passed the Sign Test (using OpDCGLs), then the mean radionuclide activity (dpm/100 cm2) for each ROC from systematic measurements along with any identified elevated areas from systematic and judgmental samples was used with the BcDCGLs to perform a mean BcSOF calculation. The dose from residual radioactivity assigned to the FSS unit is the mean BcSOF multiplied by 25 mrem/yr.

After completion of the FSS measurements in the pipe, 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 15). Data processing includes converting measurement data into reporting units, validating instrument applicability and sensitivity, calculating relevant statistical quantities, and verification that all DQO have been met. In accordance with the procedure, a preliminary Data Assessment was prepared.

Since the survey was performed with a Ludlum Model 44-10 set to the Cs-137 window, the calculated gross gamma value was applied to Cs-137, and the Co-60 and Cs-134 values were inferred based on the isotopic mix from Table 1 normalized to the gamma emitting ROC. The normalized mix includes Cs-137 98.78%, Co-60 1.21%, and Cs-134 0.01%. The surrogate ratios for the HTD nuclides listed in Table 5-15 of the LTP (i.e. 180.45 for Ni-63/Co-60; and 0.002 for Sr-90/Cs-137) were then used to infer representative concentrations for HTD ROC.

The results of the data assessment for the Diesel Generator Heat Exchanger Service Water Supply piping are provided in Attachment 2. A statistical summary of the data is presented in Table 6. No observed individual measurement exceeded an OpSOF of 0.5.

The data collected passed the Sign Test. The result of the Sign Test is provided in Attachment 3.

[14]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Table 6 - Diesel Generator Service Water Supply - Statistical Quantities Systematic Measurement Population Individual Measurement Metrics Total Number of Systematic Measurements = 256 Number of Quality Control Measurements = 17 Number of Judgmental/Investigational Measurements = 0 Total Number of Measurements = 273 Mean Systematic Measurement OpSOF = 0.144 Max Individual Systematic Measurement OpSOF = 0.488 Number of Systematic Measurements with OpSOF >0.5 = 0 Statistical Quantities - Systematic Measurement Population MEAN MEDIAN MAX MIN STD. DEV. BcDCGL Avg Dose ROC BcSOF (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) per ROC Gross Gamma 3.53E+03 2.99E+03 1.20E+04 1.33E+03 1.73E+03 N/A N/A N/A Co-60 4.31E+01 3.66E+01 1.46E+02 1.63E+01 2.12E+01 2.64E+04 0.002 0.041 Ni-63 (1) 7.77E+03 6.60E+03 2.64E+04 2.94E+03 3.82E+03 4.89E+07 0.000 0.004 Sr-90 (1) 7.05E+00 5.98E+00 2.39E+01 2.66E+00 3.47E+00 4.50E+04 0.000 0.004 Cs-134 4.68E-01 3.97E-01 1.59E+00 1.77E-01 2.30E-01 4.54E+04 0.000 0.000 Cs-137 3.53E+03 2.99E+03 1.20E+04 1.33E+03 1.73E+03 1.01E+05 0.035 0.873 (1) Concentrations for Ni-63 and Sr-90 are inferred MEAN BcSOF ASSIGNED TO SURVEY UNIT (SYSTEMATIC AVG.) = 0.037 DOSE ASSIGNED TO SURVEY UNIT (SYSTEMATIC AVG.) = 0.922 mrem/yr.

[15]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F

8. QUALITY CONTROL In compliance with ZS-LT-01, replicate measurements were performed on 5% of the survey locations chosen at random. Seventeen (17) replicate measurements were taken. Using the acceptance criteria specified in section 4.1.2 of ZS-LT-01, there was acceptable agreement between the replicate measurements and the original measurements in 15 of the 17 comparisons. Two (2) QC measurements did not fall within 20% of the original measurement.

For pipe AO-30, the 19 ft. measurement was approximately 40% less than the original measurement. For pipe AO-30, the 13 ft. measurement was 20.3% greater than the original measurement. All measurements were well below 50% of the DCGL and the instrument and detector passed the post use response check, therefore no further action was deemed necessary.

Refer to Attachment 4 for quality control analysis results.

9. INVESTIGATIONS AND RESULTS As all measurements in the accessible pipe interior surface area were below an OpSOF of 0.5, no investigations were required or performed.
10. REMEDIATION AND RESULTS No remediation was performed in this survey unit.
11. CHANGES FROM THE SURVEY PLAN The detector selected for the survey during the survey design (Ludlum Model 44-162) was unable to obtain satisfactory results due to high background readings. A Ludlum Model 44-10 detector was subsequently calibrated for the Cs-137 energy window operating mode and was used to successfully collect the measurements required.
12. DATA QUALITY ASSESSMENT In accordance with procedure ZS-LT-300-001-004, the DQOs, sample design, and data were reviewed for completeness, accuracy, and consistency. Documentation was determined to be complete and legible. The FSS unit was properly classified as Class 3. All measurement results were individually reviewed and validated. The number of measurements was sufficient to meet 10% areal surface coverage of accessible surfaces. The instrumentation used to perform the FSS was in calibration, capable of detecting the activity with an adequate minimum detectable concentration (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.

[16]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F

13. ANOMALIES No anomalies were observed during the performance or analyses of the survey.
14. CONCLUSION Two hundred fifty-six (256) static measurements were taken in the Diesel Generator Service Water Supply Header buried piping (pipe nos. AO-27, AO-28, AO-30 and AO-31). These pipes also represented the Diesel Generator Heat Exchanger Service Water Return buried piping that consisted of two (2) sections of 15-inch ID pipe that ran 367.2 linear feet under the Turbine Building basement pad (pipe nos. TO-32 and TO-33) and were determined to be obstructed by unmitigated groundwater intrusion at the time the FSS was performed. The measurements taken in the unobstructed sections (pipe nos. AO-27, AO-28, AO-30, and AO-
31) were deemed as representative of the radiological conditions that would be found in the entire pipe length. The total length of the piping of this survey unit was 671.6 linear feet (204.7 meters). The 256 readings comprised approximately 38% of the total area of the buried piping, therefore the 10% areal surface coverage requirement for a Class 3 buried pipe was achieved.

All of the measurements taken inside the buried pipe were below an OpSOF of 0.5 when compared to the OpDCGLBP. The average OpSOF for the survey unit was 0.144. The Sign Test was passed, and the Null Hypothesis was rejected. The requirements for a Class 3 survey unit have been met.

The mean BcSOF for this survey unit is 0.037. The dose contribution from survey unit 00101F, Diesel Generator Heat Exchangers Service Water Supply and Service Water Return Buried Pipe, is 0.922 mrem/yr. TEDE, based on the average concentration of the ROC in samples used for non-parametric statistical sampling.

Survey unit 00101F, Diesel Generator Heat Exchangers Service Water Supply and Service Water Return Buried Pipe 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 procedure ZS-LT-300-001-002, Survey Unit Classification
6. ZionSolutions TSD 14-016, Description of Embedded Piping, Penetrations, and Buried Pipe to Remain in Zion End State

[17]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F

7. Zion Station Historical Site Assessment
8. ZionSolutions TSD 14-015, Buried Pipe Dose Modeling & DCGLs
9. ZionSolutions TSD 11-001, Technical Support Document for Potential Radionuclides of Concern During the Decommissioning of the Zion Station
10. ZionSolutions TSD 14-019, Radionuclides of Concern for Soil and Basement Fill Model Source Terms
11. ZionSolutions TSD 17-004, Operational Derived Concentration Guideline Levels for Final Status Survey
12. ZionSolutions procedure ZS-LT-01, Quality Assurance Project Plan (for Characterization and FSS)
13. ZionSolutions procedure ZS-LT-300-001-003, Isolation and Control for Final Status Survey
14. ZionSolutions procedure ZS-LT-300-001-006, Radiation Surveys of Pipe Interiors Using Sodium/Cesium Iodide Detectors
15. ZionSolutions procedure ZS-LT-300-001-004, Final Status Survey Data Assessment
16. ATTACHMENTS Attachment 1 - 12 Inch Service Water Supply Headers Attachment 2 - Sample Data Attachment 3 - Sign Test Attachment 4 - QC Data

[18]

ATTACHMENT 1 12 INCH SERVICE WATER SUPPLY HEADERS

[19]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F 12 SERVICE WATER SUPPLY HEADERS W

A027 A030 A028 A031 Unit 2 Note: Refer to Plant Design Drawing M-106 Unit 1

[20]

ATTACHMENT 2 SAMPLE DATA

[21]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

AO-27 Zero 36 2.74E+03 3.35E+01 6.05E+03 5.49E+00 3.64E-01 2.74E+03 0.112 AO-27 1 35 2.44E+03 2.98E+01 5.38E+03 4.88E+00 3.24E-01 2.44E+03 0.099 AO-27 2 34 5.70E+03 6.96E+01 1.26E+04 1.14E+01 7.57E-01 5.70E+03 0.232 AO-27 3 33 1.05E+04 1.28E+02 2.31E+04 2.10E+01 1.39E+00 1.05E+04 0.428 AO-27 4 32 1.02E+04 1.24E+02 2.24E+04 2.04E+01 1.35E+00 1.02E+04 0.415 AO-27 5 31 1.20E+04 1.46E+02 2.64E+04 2.39E+01 1.59E+00 1.20E+04 0.488 AO-27 6 30 9.31E+03 1.14E+02 2.05E+04 1.86E+01 1.24E+00 9.31E+03 0.380 AO-27 7 29 9.31E+03 1.14E+02 2.05E+04 1.86E+01 1.24E+00 9.31E+03 0.380 AO-27 8 28 9.36E+03 1.14E+02 2.06E+04 1.87E+01 1.24E+00 9.36E+03 0.382 AO-27 9 27 7.88E+03 9.63E+01 1.74E+04 1.58E+01 1.05E+00 7.88E+03 0.321 AO-27 10 26 7.65E+03 9.34E+01 1.69E+04 1.53E+01 1.02E+00 7.65E+03 0.312 AO-27 11 25 6.97E+03 8.51E+01 1.54E+04 1.39E+01 9.25E-01 6.97E+03 0.284 AO-27 12 24 6.71E+03 8.19E+01 1.48E+04 1.34E+01 8.91E-01 6.71E+03 0.274 AO-27 13 23 6.61E+03 8.08E+01 1.46E+04 1.32E+01 8.78E-01 6.61E+03 0.270 AO-27 14 22 6.15E+03 7.51E+01 1.35E+04 1.23E+01 8.16E-01 6.15E+03 0.251 AO-27 15 21 6.17E+03 7.54E+01 1.36E+04 1.23E+01 8.19E-01 6.17E+03 0.252 AO-27 16 20 5.11E+03 6.25E+01 1.13E+04 1.02E+01 6.79E-01 5.11E+03 0.209 AO-27 17 19 5.23E+03 6.39E+01 1.15E+04 1.05E+01 6.95E-01 5.23E+03 0.213 AO-27 18 18 5.02E+03 6.13E+01 1.11E+04 1.00E+01 6.66E-01 5.02E+03 0.205 AO-27 19 17 5.40E+03 6.59E+01 1.19E+04 1.08E+01 7.16E-01 5.40E+03 0.220 AO-27 20 16 5.56E+03 6.79E+01 1.23E+04 1.11E+01 7.38E-01 5.56E+03 0.227 AO-27 21 15 4.32E+03 5.27E+01 9.51E+03 8.63E+00 5.73E-01 4.32E+03 0.176 AO-27 22 14 4.15E+03 5.07E+01 9.15E+03 8.30E+00 5.51E-01 4.15E+03 0.169 AO-27 23 13 3.87E+03 4.73E+01 8.53E+03 7.74E+00 5.14E-01 3.87E+03 0.158 AO-27 24 12 3.99E+03 4.87E+01 8.79E+03 7.98E+00 5.29E-01 3.99E+03 0.163 AO-27 25 11 3.07E+03 3.75E+01 6.77E+03 6.15E+00 4.08E-01 3.07E+03 0.125 AO-27 26 10 2.91E+03 3.55E+01 6.41E+03 5.82E+00 3.86E-01 2.91E+03 0.119 AO-27 27 9 3.19E+03 3.90E+01 7.03E+03 6.38E+00 4.24E-01 3.19E+03 0.130 AO-27 28 8 2.70E+03 3.30E+01 5.95E+03 5.40E+00 3.58E-01 2.70E+03 0.110 AO-27 29 7 2.67E+03 3.27E+01 5.89E+03 5.35E+00 3.55E-01 2.67E+03 0.109 AO-27 30 6 2.23E+03 2.72E+01 4.91E+03 4.46E+00 2.96E-01 2.23E+03 0.091 AO-27 31 5 2.28E+03 2.78E+01 5.02E+03 4.55E+00 3.02E-01 2.28E+03 0.093 AO-27 32 4 2.18E+03 2.66E+01 4.81E+03 4.36E+00 2.90E-01 2.18E+03 0.089 AO-27 33 3 2.28E+03 2.78E+01 5.02E+03 4.55E+00 3.02E-01 2.28E+03 0.093 AO-27 34 2 2.13E+03 2.61E+01 4.70E+03 4.27E+00 2.83E-01 2.13E+03 0.087 AO-27 35 1 2.58E+03 3.15E+01 5.69E+03 5.16E+00 3.43E-01 2.58E+03 0.105 AO-27 Zero 25 2.10E+03 2.56E+01 4.62E+03 4.19E+00 2.78E-01 2.10E+03 0.086 AO-27 1 24 2.88E+03 3.52E+01 6.36E+03 5.77E+00 3.83E-01 2.88E+03 0.118 AO-27 2 23 2.32E+03 2.83E+01 5.10E+03 4.63E+00 3.07E-01 2.32E+03 0.094 AO-27 3 22 2.23E+03 2.72E+01 4.91E+03 4.46E+00 2.96E-01 2.23E+03 0.091 AO-27 4 21 2.97E+03 3.63E+01 6.55E+03 5.94E+00 3.94E-01 2.97E+03 0.121

[22]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting (continued)

Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) (dpm/100cm2)

AO-27 5 20 3.19E+03 3.90E+01 7.03E+03 6.38E+00 4.23E-01 3.19E+03 0.130 AO-27 6 19 2.93E+03 3.58E+01 6.45E+03 5.85E+00 3.89E-01 2.93E+03 0.119 AO-27 7 18 2.66E+03 3.25E+01 5.87E+03 5.33E+00 3.54E-01 2.66E+03 0.109 AO-27 8 17 2.99E+03 3.66E+01 6.60E+03 5.98E+00 3.97E-01 2.99E+03 0.122 AO-27 9 16 3.15E+03 3.84E+01 6.93E+03 6.29E+00 4.18E-01 3.15E+03 0.128 AO-27 10 15 2.99E+03 3.66E+01 6.60E+03 5.98E+00 3.97E-01 2.99E+03 0.122 AO-27 11 14 3.54E+03 4.32E+01 7.80E+03 7.08E+00 4.70E-01 3.54E+03 0.144 AO-27 12 13 2.66E+03 3.25E+01 5.87E+03 5.33E+00 3.54E-01 2.66E+03 0.109 AO-27 13 12 2.47E+03 3.01E+01 5.44E+03 4.94E+00 3.28E-01 2.47E+03 0.101 AO-27 14 11 2.47E+03 3.01E+01 5.44E+03 4.94E+00 3.28E-01 2.47E+03 0.101 AO-27 15 10 2.12E+03 2.59E+01 4.67E+03 4.24E+00 2.81E-01 2.12E+03 0.086 AO-27 16 9 2.18E+03 2.67E+01 4.81E+03 4.37E+00 2.90E-01 2.18E+03 0.089 AO-27 17 8 2.12E+03 2.59E+01 4.67E+03 4.24E+00 2.81E-01 2.12E+03 0.086 AO-27 18 7 1.92E+03 2.35E+01 4.24E+03 3.84E+00 2.55E-01 1.92E+03 0.078 AO-27 19 6 2.10E+03 2.56E+01 4.62E+03 4.19E+00 2.78E-01 2.10E+03 0.086 AO-27 20 5 2.16E+03 2.64E+01 4.77E+03 4.32E+00 2.87E-01 2.16E+03 0.088 AO-27 21 4 2.38E+03 2.91E+01 5.25E+03 4.76E+00 3.16E-01 2.38E+03 0.097 AO-27 22 3 2.36E+03 2.88E+01 5.20E+03 4.72E+00 3.13E-01 2.36E+03 0.096 AO-27 23 2 2.82E+03 3.44E+01 6.21E+03 5.64E+00 3.74E-01 2.82E+03 0.115 AO-27 24 1 1.90E+03 2.32E+01 4.19E+03 3.80E+00 2.52E-01 1.90E+03 0.077 AO-27 25 0 2.05E+03 2.51E+01 4.53E+03 4.11E+00 2.73E-01 2.05E+03 0.084 AO-28 Zero 38 2.04E+03 2.49E+01 4.50E+03 4.08E+00 2.71E-01 2.04E+03 0.083 AO-28 1 37 2.20E+03 2.69E+01 4.86E+03 4.41E+00 2.93E-01 2.20E+03 0.090 AO-28 2 36 2.91E+03 3.55E+01 6.41E+03 5.82E+00 3.86E-01 2.91E+03 0.119 AO-28 3 35 2.72E+03 3.32E+01 6.00E+03 5.44E+00 3.61E-01 2.72E+03 0.111 AO-28 4 34 4.53E+03 5.53E+01 9.98E+03 9.05E+00 6.01E-01 4.53E+03 0.185 AO-28 5 33 4.97E+03 6.07E+01 1.10E+04 9.95E+00 6.60E-01 4.97E+03 0.203 AO-28 6 32 6.50E+03 7.94E+01 1.43E+04 1.30E+01 8.63E-01 6.50E+03 0.265 AO-28 7 31 8.33E+03 1.02E+02 1.84E+04 1.67E+01 1.11E+00 8.33E+03 0.340 AO-28 8 30 9.92E+03 1.21E+02 2.19E+04 1.98E+01 1.32E+00 9.92E+03 0.405 AO-28 9 29 7.98E+03 9.74E+01 1.76E+04 1.60E+01 1.06E+00 7.98E+03 0.325 AO-28 10 28 8.35E+03 1.02E+02 1.84E+04 1.67E+01 1.11E+00 8.35E+03 0.341 AO-28 11 27 7.37E+03 9.00E+01 1.62E+04 1.47E+01 9.78E-01 7.37E+03 0.300 AO-28 12 26 5.56E+03 6.79E+01 1.23E+04 1.11E+01 7.38E-01 5.56E+03 0.227 AO-28 13 25 6.36E+03 7.76E+01 1.40E+04 1.27E+01 8.44E-01 6.36E+03 0.259 AO-28 14 24 4.86E+03 5.93E+01 1.07E+04 9.71E+00 6.45E-01 4.86E+03 0.198 AO-28 15 23 6.29E+03 7.68E+01 1.39E+04 1.26E+01 8.35E-01 6.29E+03 0.256 AO-28 16 22 4.60E+03 5.62E+01 1.01E+04 9.20E+00 6.10E-01 4.60E+03 0.187 AO-28 17 21 4.39E+03 5.36E+01 9.67E+03 8.77E+00 5.82E-01 4.39E+03 0.179 AO-28 18 20 4.01E+03 4.90E+01 8.84E+03 8.02E+00 5.33E-01 4.01E+03 0.164 AO-28 19 19 4.32E+03 5.27E+01 9.51E+03 8.63E+00 5.73E-01 4.32E+03 0.176

[23]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting (continued)

Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) (dpm/100cm2)

AO-28 20 18 3.75E+03 4.58E+01 8.27E+03 7.51E+00 4.98E-01 3.75E+03 0.153 AO-28 21 17 4.13E+03 5.04E+01 9.10E+03 8.26E+00 5.48E-01 4.13E+03 0.168 AO-28 22 16 3.78E+03 4.61E+01 8.32E+03 7.55E+00 5.01E-01 3.78E+03 0.154 AO-28 23 15 3.21E+03 3.93E+01 7.08E+03 6.43E+00 4.27E-01 3.21E+03 0.131 AO-28 24 14 3.50E+03 4.27E+01 7.70E+03 6.99E+00 4.64E-01 3.50E+03 0.143 AO-28 25 13 3.57E+03 4.36E+01 7.86E+03 7.13E+00 4.73E-01 3.57E+03 0.145 AO-28 26 12 3.57E+03 4.36E+01 7.86E+03 7.13E+00 4.73E-01 3.57E+03 0.145 AO-28 27 11 3.12E+03 3.81E+01 6.88E+03 6.24E+00 4.14E-01 3.12E+03 0.127 AO-28 28 10 3.21E+03 3.93E+01 7.08E+03 6.43E+00 4.27E-01 3.21E+03 0.131 AO-28 29 9 2.93E+03 3.58E+01 6.46E+03 5.86E+00 3.89E-01 2.93E+03 0.120 AO-28 30 8 2.23E+03 2.72E+01 4.91E+03 4.46E+00 2.96E-01 2.23E+03 0.091 AO-28 31 7 2.60E+03 3.18E+01 5.74E+03 5.21E+00 3.46E-01 2.60E+03 0.106 AO-28 32 6 2.28E+03 2.78E+01 5.02E+03 4.55E+00 3.02E-01 2.28E+03 0.093 AO-28 33 5 2.28E+03 2.78E+01 5.02E+03 4.55E+00 3.02E-01 2.28E+03 0.093 AO-28 34 4 2.28E+03 2.78E+01 5.02E+03 4.55E+00 3.02E-01 2.28E+03 0.093 AO-28 35 3 2.11E+03 2.58E+01 4.65E+03 4.22E+00 2.80E-01 2.11E+03 0.086 AO-28 36 2 2.16E+03 2.64E+01 4.76E+03 4.32E+00 2.87E-01 2.16E+03 0.088 AO-28 37 1 2.28E+03 2.78E+01 5.02E+03 4.55E+00 3.02E-01 2.28E+03 0.093 AO-28 Zero 25 2.08E+03 2.53E+01 4.57E+03 4.15E+00 2.76E-01 2.08E+03 0.085 AO-28 1 24 2.60E+03 3.17E+01 5.73E+03 5.20E+00 3.45E-01 2.60E+03 0.106 AO-28 2 23 2.18E+03 2.67E+01 4.81E+03 4.37E+00 2.90E-01 2.18E+03 0.089 AO-28 3 22 2.05E+03 2.51E+01 4.53E+03 4.11E+00 2.73E-01 2.05E+03 0.084 AO-28 4 21 2.08E+03 2.53E+01 4.57E+03 4.15E+00 2.76E-01 2.08E+03 0.085 AO-28 5 20 2.36E+03 2.88E+01 5.20E+03 4.72E+00 3.13E-01 2.36E+03 0.096 AO-28 6 19 3.10E+03 3.79E+01 6.84E+03 6.20E+00 4.12E-01 3.10E+03 0.126 AO-28 7 18 2.84E+03 3.47E+01 6.26E+03 5.68E+00 3.77E-01 2.84E+03 0.116 AO-28 8 17 2.95E+03 3.60E+01 6.50E+03 5.90E+00 3.92E-01 2.95E+03 0.120 AO-28 9 16 3.93E+03 4.80E+01 8.67E+03 7.86E+00 5.22E-01 3.93E+03 0.160 AO-28 10 15 3.65E+03 4.46E+01 8.04E+03 7.30E+00 4.84E-01 3.65E+03 0.149 AO-28 11 14 3.82E+03 4.67E+01 8.43E+03 7.65E+00 5.08E-01 3.82E+03 0.156 AO-28 12 13 4.57E+03 5.58E+01 1.01E+04 9.13E+00 6.06E-01 4.57E+03 0.186 AO-28 13 12 4.19E+03 5.12E+01 9.24E+03 8.39E+00 5.57E-01 4.19E+03 0.171 AO-28 14 11 4.24E+03 5.18E+01 9.34E+03 8.48E+00 5.63E-01 4.24E+03 0.173 AO-28 15 10 3.67E+03 4.48E+01 8.09E+03 7.34E+00 4.87E-01 3.67E+03 0.150 AO-28 16 9 3.30E+03 4.03E+01 7.27E+03 6.60E+00 4.38E-01 3.30E+03 0.134 AO-28 17 8 3.89E+03 4.75E+01 8.57E+03 7.78E+00 5.16E-01 3.89E+03 0.159 AO-28 18 7 2.82E+03 3.44E+01 6.21E+03 5.64E+00 3.74E-01 2.82E+03 0.115 AO-28 19 6 1.57E+03 1.92E+01 3.47E+03 3.15E+00 2.09E-01 1.57E+03 0.064 AO-28 20 5 2.12E+03 2.59E+01 4.67E+03 4.24E+00 2.81E-01 2.12E+03 0.086 AO-28 21 4 1.83E+03 2.24E+01 4.04E+03 3.67E+00 2.44E-01 1.83E+03 0.075 AO-28 22 3 1.77E+03 2.16E+01 3.90E+03 3.54E+00 2.35E-01 1.77E+03 0.072

[24]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting (continued)

Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) (dpm/100cm2)

AO-28 23 2 1.62E+03 1.97E+01 3.56E+03 3.23E+00 2.15E-01 1.62E+03 0.066 AO-28 24 1 1.77E+03 2.16E+01 3.90E+03 3.54E+00 2.35E-01 1.77E+03 0.072 AO-28 25 0 2.01E+03 2.45E+01 4.43E+03 4.02E+00 2.67E-01 2.01E+03 0.082 AO-30 Zero 38 2.51E+03 3.07E+01 5.53E+03 5.02E+00 3.33E-01 2.51E+03 0.102 AO-30 1 37 2.81E+03 3.44E+01 6.20E+03 5.63E+00 3.74E-01 2.81E+03 0.115 AO-30 2 36 3.10E+03 3.78E+01 6.82E+03 6.19E+00 4.11E-01 3.10E+03 0.126 AO-30 3 35 3.40E+03 4.15E+01 7.50E+03 6.80E+00 4.52E-01 3.40E+03 0.139 AO-30 4 34 3.05E+03 3.72E+01 6.72E+03 6.10E+00 4.05E-01 3.05E+03 0.124 AO-30 5 33 2.98E+03 3.64E+01 6.57E+03 5.96E+00 3.96E-01 2.98E+03 0.121 AO-30 6 32 2.98E+03 3.64E+01 6.57E+03 5.96E+00 3.96E-01 2.98E+03 0.121 AO-30 7 31 3.40E+03 4.15E+01 7.50E+03 6.80E+00 4.52E-01 3.40E+03 0.139 AO-30 8 30 3.31E+03 4.04E+01 7.29E+03 6.61E+00 4.39E-01 3.31E+03 0.135 AO-30 9 29 3.64E+03 4.44E+01 8.01E+03 7.27E+00 4.83E-01 3.64E+03 0.148 AO-30 10 28 3.38E+03 4.13E+01 7.45E+03 6.76E+00 4.48E-01 3.38E+03 0.138 AO-30 11 27 3.61E+03 4.41E+01 7.96E+03 7.22E+00 4.80E-01 3.61E+03 0.147 AO-30 12 26 3.26E+03 3.98E+01 7.19E+03 6.52E+00 4.33E-01 3.26E+03 0.133 AO-30 13 25 2.86E+03 3.50E+01 6.31E+03 5.72E+00 3.80E-01 2.86E+03 0.117 AO-30 14 24 3.26E+03 3.98E+01 7.19E+03 6.52E+00 4.33E-01 3.26E+03 0.133 AO-30 15 23 2.96E+03 3.61E+01 6.51E+03 5.91E+00 3.92E-01 2.96E+03 0.121 AO-30 16 22 2.56E+03 3.12E+01 5.64E+03 5.11E+00 3.39E-01 2.56E+03 0.104 AO-30 17 21 3.45E+03 4.21E+01 7.60E+03 6.90E+00 4.58E-01 3.45E+03 0.141 AO-30 18 20 3.38E+03 4.13E+01 7.45E+03 6.76E+00 4.48E-01 3.38E+03 0.138 AO-30 19 19 2.98E+03 3.64E+01 6.57E+03 5.96E+00 3.96E-01 2.98E+03 0.121 AO-30 20 18 3.24E+03 3.95E+01 7.13E+03 6.47E+00 4.30E-01 3.24E+03 0.132 AO-30 21 17 3.17E+03 3.87E+01 6.98E+03 6.33E+00 4.20E-01 3.17E+03 0.129 AO-30 22 16 2.91E+03 3.55E+01 6.41E+03 5.82E+00 3.86E-01 2.91E+03 0.119 AO-30 23 15 2.58E+03 3.15E+01 5.69E+03 5.16E+00 3.43E-01 2.58E+03 0.105 AO-30 24 14 2.51E+03 3.07E+01 5.53E+03 5.02E+00 3.33E-01 2.51E+03 0.102 AO-30 25 13 3.00E+03 3.67E+01 6.62E+03 6.01E+00 3.99E-01 3.00E+03 0.122 AO-30 26 12 2.60E+03 3.18E+01 5.74E+03 5.21E+00 3.46E-01 2.60E+03 0.106 AO-30 27 11 2.63E+03 3.21E+01 5.79E+03 5.25E+00 3.49E-01 2.63E+03 0.107 AO-30 28 10 2.72E+03 3.32E+01 6.00E+03 5.44E+00 3.61E-01 2.72E+03 0.111 AO-30 29 9 2.72E+03 3.32E+01 6.00E+03 5.44E+00 3.61E-01 2.72E+03 0.111 AO-30 30 8 2.35E+03 2.87E+01 5.17E+03 4.69E+00 3.11E-01 2.35E+03 0.096 AO-30 31 7 2.37E+03 2.89E+01 5.22E+03 4.74E+00 3.15E-01 2.37E+03 0.097 AO-30 32 6 2.86E+03 3.50E+01 6.31E+03 5.72E+00 3.80E-01 2.86E+03 0.117 AO-30 33 5 2.44E+03 2.98E+01 5.38E+03 4.88E+00 3.24E-01 2.44E+03 0.099 AO-30 34 4 1.99E+03 2.44E+01 4.39E+03 3.99E+00 2.65E-01 1.99E+03 0.081 AO-30 35 3 1.74E+03 2.12E+01 3.83E+03 3.47E+00 2.30E-01 1.74E+03 0.071 AO-30 36 2 2.06E+03 2.52E+01 4.55E+03 4.13E+00 2.74E-01 2.06E+03 0.084 AO-30 37 1 2.84E+03 3.47E+01 6.26E+03 5.68E+00 3.77E-01 2.84E+03 0.116

[25]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting (continued)

Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) (dpm/100cm2)

AO-30 Zero 25 1.92E+03 2.35E+01 4.24E+03 3.84E+00 2.55E-01 1.92E+03 0.078 AO-30 1 24 2.14E+03 2.61E+01 4.72E+03 4.28E+00 2.84E-01 2.14E+03 0.087 AO-30 2 23 1.64E+03 2.00E+01 3.61E+03 3.28E+00 2.18E-01 1.64E+03 0.067 AO-30 3 22 2.34E+03 2.85E+01 5.15E+03 4.67E+00 3.10E-01 2.34E+03 0.095 AO-30 4 21 2.45E+03 2.99E+01 5.39E+03 4.89E+00 3.25E-01 2.45E+03 0.100 AO-30 5 20 2.56E+03 3.12E+01 5.63E+03 5.11E+00 3.39E-01 2.56E+03 0.104 AO-30 6 19 2.29E+03 2.80E+01 5.06E+03 4.59E+00 3.05E-01 2.29E+03 0.094 AO-30 7 18 2.99E+03 3.66E+01 6.60E+03 5.98E+00 3.97E-01 2.99E+03 0.122 AO-30 8 17 2.82E+03 3.44E+01 6.21E+03 5.64E+00 3.74E-01 2.82E+03 0.115 AO-30 9 16 2.45E+03 2.99E+01 5.39E+03 4.89E+00 3.25E-01 2.45E+03 0.100 AO-30 10 15 3.04E+03 3.71E+01 6.69E+03 6.07E+00 4.03E-01 3.04E+03 0.124 AO-30 11 14 2.73E+03 3.34E+01 6.02E+03 5.46E+00 3.63E-01 2.73E+03 0.111 AO-30 12 13 4.76E+03 5.82E+01 1.05E+04 9.52E+00 6.32E-01 4.76E+03 0.194 AO-30 13 12 5.11E+03 6.24E+01 1.13E+04 1.02E+01 6.79E-01 5.11E+03 0.208 AO-30 14 11 4.59E+03 5.60E+01 1.01E+04 9.17E+00 6.09E-01 4.59E+03 0.187 AO-30 15 10 5.00E+03 6.11E+01 1.10E+04 1.00E+01 6.64E-01 5.00E+03 0.204 AO-30 16 9 3.71E+03 4.54E+01 8.18E+03 7.43E+00 4.93E-01 3.71E+03 0.151 AO-30 17 8 3.49E+03 4.27E+01 7.70E+03 6.99E+00 4.64E-01 3.49E+03 0.143 AO-30 18 7 2.77E+03 3.39E+01 6.11E+03 5.55E+00 3.68E-01 2.77E+03 0.113 AO-30 19 6 2.58E+03 3.15E+01 5.68E+03 5.15E+00 3.42E-01 2.58E+03 0.105 AO-30 20 5 2.27E+03 2.77E+01 5.01E+03 4.54E+00 3.02E-01 2.27E+03 0.093 AO-30 21 4 1.81E+03 2.21E+01 4.00E+03 3.63E+00 2.41E-01 1.81E+03 0.074 AO-30 22 3 1.33E+03 1.63E+01 2.94E+03 2.66E+00 1.77E-01 1.33E+03 0.054 AO-30 23 2 1.83E+03 2.24E+01 4.04E+03 3.67E+00 2.44E-01 1.83E+03 0.075 AO-30 24 1 1.81E+03 2.21E+01 4.00E+03 3.63E+00 2.41E-01 1.81E+03 0.074 AO-30 25 0 1.42E+03 1.73E+01 3.13E+03 2.84E+00 1.89E-01 1.42E+03 0.058 AO-31 Zero 40 2.70E+03 3.30E+01 5.95E+03 5.40E+00 3.58E-01 2.70E+03 0.110 AO-31 1 39 2.23E+03 2.72E+01 4.91E+03 4.46E+00 2.96E-01 2.23E+03 0.091 AO-31 2 38 3.26E+03 3.98E+01 7.19E+03 6.52E+00 4.33E-01 3.26E+03 0.133 AO-31 3 37 2.96E+03 3.61E+01 6.51E+03 5.91E+00 3.92E-01 2.96E+03 0.121 AO-31 4 36 3.73E+03 4.56E+01 8.22E+03 7.46E+00 4.95E-01 3.73E+03 0.152 AO-31 5 35 4.67E+03 5.70E+01 1.03E+04 9.34E+00 6.20E-01 4.67E+03 0.190 AO-31 6 34 4.76E+03 5.82E+01 1.05E+04 9.52E+00 6.32E-01 4.76E+03 0.194 AO-31 7 33 4.36E+03 5.33E+01 9.62E+03 8.73E+00 5.79E-01 4.36E+03 0.178 AO-31 8 32 5.02E+03 6.13E+01 1.11E+04 1.00E+01 6.66E-01 5.02E+03 0.205 AO-31 9 31 5.28E+03 6.45E+01 1.16E+04 1.06E+01 7.01E-01 5.28E+03 0.215 AO-31 10 30 5.04E+03 6.16E+01 1.11E+04 1.01E+01 6.70E-01 5.04E+03 0.206 AO-31 11 29 5.14E+03 6.27E+01 1.13E+04 1.03E+01 6.82E-01 5.14E+03 0.209 AO-31 12 28 4.50E+03 5.50E+01 9.93E+03 9.01E+00 5.98E-01 4.50E+03 0.184 AO-31 13 27 4.57E+03 5.59E+01 1.01E+04 9.15E+00 6.07E-01 4.57E+03 0.187 AO-31 14 26 4.36E+03 5.33E+01 9.62E+03 8.73E+00 5.79E-01 4.36E+03 0.178

[26]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting (continued)

Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) (dpm/100cm2)

AO-31 15 25 4.53E+03 5.53E+01 9.98E+03 9.05E+00 6.01E-01 4.53E+03 0.185 AO-31 16 24 3.78E+03 4.61E+01 8.32E+03 7.55E+00 5.01E-01 3.78E+03 0.154 AO-31 17 23 4.15E+03 5.07E+01 9.15E+03 8.30E+00 5.51E-01 4.15E+03 0.169 AO-31 18 22 4.67E+03 5.70E+01 1.03E+04 9.34E+00 6.20E-01 4.67E+03 0.190 AO-31 19 21 4.32E+03 5.27E+01 9.51E+03 8.63E+00 5.73E-01 4.32E+03 0.176 AO-31 20 20 5.09E+03 6.22E+01 1.12E+04 1.02E+01 6.76E-01 5.09E+03 0.208 AO-31 21 19 4.18E+03 5.10E+01 9.20E+03 8.35E+00 5.54E-01 4.18E+03 0.170 AO-31 22 18 3.89E+03 4.76E+01 8.58E+03 7.79E+00 5.17E-01 3.89E+03 0.159 AO-31 23 17 4.29E+03 5.24E+01 9.46E+03 8.59E+00 5.70E-01 4.29E+03 0.175 AO-31 24 16 5.16E+03 6.30E+01 1.14E+04 1.03E+01 6.85E-01 5.16E+03 0.210 AO-31 25 15 4.11E+03 5.01E+01 9.05E+03 8.21E+00 5.45E-01 4.11E+03 0.167 AO-31 26 14 4.27E+03 5.21E+01 9.41E+03 8.54E+00 5.67E-01 4.27E+03 0.174 AO-31 27 13 4.13E+03 5.04E+01 9.10E+03 8.26E+00 5.48E-01 4.13E+03 0.168 AO-31 28 12 3.68E+03 4.50E+01 8.12E+03 7.37E+00 4.89E-01 3.68E+03 0.150 AO-31 29 11 3.40E+03 4.15E+01 7.50E+03 6.80E+00 4.52E-01 3.40E+03 0.139 AO-31 30 10 3.28E+03 4.01E+01 7.24E+03 6.57E+00 4.36E-01 3.28E+03 0.134 AO-31 31 9 3.73E+03 4.56E+01 8.22E+03 7.46E+00 4.95E-01 3.73E+03 0.152 AO-31 32 8 3.33E+03 4.07E+01 7.34E+03 6.66E+00 4.42E-01 3.33E+03 0.136 AO-31 33 7 3.26E+03 3.98E+01 7.19E+03 6.52E+00 4.33E-01 3.26E+03 0.133 AO-31 34 6 2.79E+03 3.41E+01 6.15E+03 5.58E+00 3.71E-01 2.79E+03 0.114 AO-31 35 5 1.95E+03 2.38E+01 4.29E+03 3.89E+00 2.58E-01 1.95E+03 0.079 AO-31 36 4 1.97E+03 2.41E+01 4.34E+03 3.94E+00 2.62E-01 1.97E+03 0.080 AO-31 37 3 2.02E+03 2.46E+01 4.45E+03 4.03E+00 2.68E-01 2.02E+03 0.082 AO-31 38 2 2.42E+03 2.95E+01 5.33E+03 4.83E+00 3.21E-01 2.42E+03 0.099 AO-31 39 1 1.95E+03 2.38E+01 4.29E+03 3.89E+00 2.58E-01 1.95E+03 0.079 AO-31 Zero 26 2.40E+03 2.93E+01 5.30E+03 4.81E+00 3.19E-01 2.40E+03 0.098 AO-31 1 25 2.53E+03 3.09E+01 5.58E+03 5.07E+00 3.36E-01 2.53E+03 0.103 AO-31 2 24 2.38E+03 2.91E+01 5.25E+03 4.76E+00 3.16E-01 2.38E+03 0.097 AO-31 3 23 2.95E+03 3.60E+01 6.50E+03 5.90E+00 3.92E-01 2.95E+03 0.120 AO-31 4 22 2.73E+03 3.34E+01 6.02E+03 5.46E+00 3.63E-01 2.73E+03 0.111 AO-31 5 21 3.08E+03 3.76E+01 6.79E+03 6.16E+00 4.09E-01 3.08E+03 0.126 AO-31 6 20 2.97E+03 3.63E+01 6.55E+03 5.94E+00 3.94E-01 2.97E+03 0.121 AO-31 7 19 2.93E+03 3.58E+01 6.45E+03 5.85E+00 3.89E-01 2.93E+03 0.119 AO-31 8 18 3.47E+03 4.24E+01 7.65E+03 6.95E+00 4.61E-01 3.47E+03 0.142 AO-31 9 17 4.46E+03 5.44E+01 9.82E+03 8.91E+00 5.92E-01 4.46E+03 0.182 AO-31 10 16 4.35E+03 5.31E+01 9.58E+03 8.69E+00 5.77E-01 4.35E+03 0.177 AO-31 11 15 4.39E+03 5.36E+01 9.68E+03 8.78E+00 5.83E-01 4.39E+03 0.179 AO-31 12 14 4.50E+03 5.50E+01 9.92E+03 9.00E+00 5.97E-01 4.50E+03 0.183 AO-31 13 13 4.61E+03 5.63E+01 1.02E+04 9.22E+00 6.12E-01 4.61E+03 0.188 AO-31 14 12 4.96E+03 6.06E+01 1.09E+04 9.92E+00 6.58E-01 4.96E+03 0.202 AO-31 15 11 3.54E+03 4.32E+01 7.80E+03 7.08E+00 4.70E-01 3.54E+03 0.144

[27]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Pipes AO-27, AO-28, AO-30 and AO-31 Data Reporting (continued)

Feet Gamma Co-60 Ni-63 Sr-90 Cs-134 Cs-137 Pipe Position into Result OpSOF Pipe 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) 2 (dpm/100cm ) (dpm/100cm2)

AO-31 16 10 3.39E+03 4.14E+01 7.46E+03 6.77E+00 4.50E-01 3.39E+03 0.138 AO-31 17 9 2.82E+03 3.44E+01 6.21E+03 5.64E+00 3.74E-01 2.82E+03 0.115 AO-31 18 8 1.73E+03 2.11E+01 3.80E+03 3.45E+00 2.29E-01 1.73E+03 0.070 AO-31 19 7 2.14E+03 2.61E+01 4.72E+03 4.28E+00 2.84E-01 2.14E+03 0.087 AO-31 20 6 1.83E+03 2.24E+01 4.04E+03 3.67E+00 2.44E-01 1.83E+03 0.075 AO-31 21 5 2.45E+03 2.99E+01 5.39E+03 4.89E+00 3.25E-01 2.45E+03 0.100 AO-31 22 4 1.66E+03 2.03E+01 3.66E+03 3.32E+00 2.20E-01 1.66E+03 0.068 AO-31 23 3 1.59E+03 1.95E+01 3.51E+03 3.19E+00 2.12E-01 1.59E+03 0.065 AO-31 24 2 1.86E+03 2.27E+01 4.09E+03 3.71E+00 2.47E-01 1.86E+03 0.076 AO-31 25 1 2.14E+03 2.61E+01 4.72E+03 4.28E+00 2.84E-01 2.14E+03 0.087 AO-31 14 12 4.96E+03 6.06E+01 1.09E+04 9.92E+00 6.58E-01 4.96E+03 0.202 AO-31 15 11 3.54E+03 4.32E+01 7.80E+03 7.08E+00 4.70E-01 3.54E+03 0.144 AO-31 16 10 3.39E+03 4.14E+01 7.46E+03 6.77E+00 4.50E-01 3.39E+03 0.138 AO-31 17 9 2.82E+03 3.44E+01 6.21E+03 5.64E+00 3.74E-01 2.82E+03 0.115 AO-31 18 8 1.73E+03 2.11E+01 3.80E+03 3.45E+00 2.29E-01 1.73E+03 0.070 AO-31 19 7 2.14E+03 2.61E+01 4.72E+03 4.28E+00 2.84E-01 2.14E+03 0.087 AO-31 20 6 1.83E+03 2.24E+01 4.04E+03 3.67E+00 2.44E-01 1.83E+03 0.075 AO-31 21 5 2.45E+03 2.99E+01 5.39E+03 4.89E+00 3.25E-01 2.45E+03 0.100 AO-31 22 4 1.66E+03 2.03E+01 3.66E+03 3.32E+00 2.20E-01 1.66E+03 0.068 AO-31 23 3 1.59E+03 1.95E+01 3.51E+03 3.19E+00 2.12E-01 1.59E+03 0.065 AO-31 24 2 1.86E+03 2.27E+01 4.09E+03 3.71E+00 2.47E-01 1.86E+03 0.076 AO-31 25 1 2.14E+03 2.61E+01 4.72E+03 4.28E+00 2.84E-01 2.14E+03 0.087

[28]

ATTACHMENT 3 SIGN TEST

[29]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Sign Test - Diesel Generator Service Water Supply Pipe Survey Area 00101 Survey Area Service Water Supply Header 00101F Buried Pipe AO-27, AO-28, AO-30 and Survey Unit Survey Unit AO-31 Classification 3 Type I Error 0.05 Number of Measurements 256 SOF SOF

  1. 1-Ws Sign # 1-Ws Sign (Ws) (Ws) 1 0.112 0.888 +1 129 0.126 0.874 +1 2 0.099 0.901 +1 130 0.139 0.861 +1 3 0.232 0.768 +1 131 0.124 0.876 +1 4 0.428 0.572 +1 132 0.121 0.879 +1 5 0.415 0.585 +1 133 0.121 0.879 +1 6 0.488 0.512 +1 134 0.139 0.861 +1 7 0.380 0.620 +1 135 0.135 0.865 +1 8 0.380 0.620 +1 136 0.148 0.852 +1 9 0.382 0.618 +1 137 0.138 0.862 +1 10 0.321 0.679 +1 138 0.147 0.853 +1 11 0.312 0.688 +1 139 0.133 0.867 +1 12 0.284 0.716 +1 140 0.117 0.883 +1 13 0.274 0.726 +1 141 0.133 0.867 +1 14 0.270 0.730 +1 142 0.121 0.879 +1 15 0.251 0.749 +1 143 0.104 0.896 +1 16 0.252 0.748 +1 144 0.141 0.859 +1 17 0.209 0.791 +1 145 0.138 0.862 +1 18 0.213 0.787 +1 146 0.121 0.879 +1 19 0.205 0.795 +1 147 0.132 0.868 +1 20 0.220 0.780 +1 148 0.129 0.871 +1 21 0.227 0.773 +1 149 0.119 0.881 +1 22 0.176 0.824 +1 150 0.105 0.895 +1 23 0.169 0.831 +1 151 0.102 0.898 +1 24 0.158 0.842 +1 152 0.122 0.878 +1 25 0.163 0.837 +1 153 0.106 0.894 +1 26 0.125 0.875 +1 154 0.107 0.893 +1 27 0.119 0.881 +1 155 0.111 0.889 +1 28 0.130 0.870 +1 156 0.111 0.889 +1 29 0.110 0.890 +1 157 0.096 0.904 +1 30 0.109 0.891 +1 158 0.097 0.903 +1 31 0.091 0.909 +1 159 0.117 0.883 +1 32 0.093 0.907 +1 160 0.099 0.901 +1 33 0.089 0.911 +1 161 0.081 0.919 +1

[30]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Sign Test - Diesel Generator Service Water Supply Pipe (continued)

SOF SOF

  1. 1-Ws Sign # 1-Ws Sign (Ws) (Ws) 34 0.093 0.907 +1 162 0.071 0.929 +1 35 0.087 0.913 +1 163 0.084 0.916 +1 36 0.105 0.895 +1 164 0.116 0.884 +1 37 0.086 0.914 +1 165 0.078 0.922 +1 38 0.118 0.882 +1 166 0.087 0.913 +1 39 0.094 0.906 +1 167 0.067 0.933 +1 40 0.091 0.909 +1 168 0.095 0.905 +1 41 0.121 0.879 +1 169 0.100 0.900 +1 42 0.130 0.870 +1 170 0.104 0.896 +1 43 0.119 0.881 +1 171 0.094 0.906 +1 44 0.109 0.891 +1 172 0.122 0.878 +1 45 0.122 0.878 +1 173 0.115 0.885 +1 46 0.128 0.872 +1 174 0.100 0.900 +1 47 0.122 0.878 +1 175 0.124 0.876 +1 48 0.144 0.856 +1 176 0.111 0.889 +1 49 0.109 0.891 +1 177 0.194 0.806 +1 50 0.101 0.899 +1 178 0.208 0.792 +1 51 0.101 0.899 +1 179 0.187 0.813 +1 52 0.086 0.914 +1 180 0.204 0.796 +1 53 0.089 0.911 +1 181 0.151 0.849 +1 54 0.086 0.914 +1 182 0.143 0.857 +1 55 0.078 0.922 +1 183 0.113 0.887 +1 56 0.086 0.914 +1 184 0.105 0.895 +1 57 0.088 0.912 +1 185 0.093 0.907 +1 58 0.097 0.903 +1 186 0.074 0.926 +1 59 0.096 0.904 +1 187 0.054 0.946 +1 60 0.115 0.885 +1 188 0.075 0.925 +1 61 0.077 0.923 +1 189 0.074 0.926 +1 62 0.084 0.916 +1 190 0.058 0.942 +1 63 0.083 0.917 +1 191 0.110 0.890 +1 64 0.090 0.910 +1 192 0.091 0.909 +1 65 0.119 0.881 +1 193 0.133 0.867 +1 66 0.111 0.889 +1 194 0.121 0.879 +1 67 0.185 0.815 +1 195 0.152 0.848 +1 68 0.203 0.797 +1 196 0.190 0.810 +1 69 0.265 0.735 +1 197 0.194 0.806 +1 70 0.340 0.660 +1 198 0.178 0.822 +1 71 0.405 0.595 +1 199 0.205 0.795 +1

[31]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Sign Test - Diesel Generator Service Water Supply Pipe (continued)

SOF SOF

  1. 1-Ws Sign # 1-Ws Sign (Ws) (Ws) 72 0.325 0.675 +1 200 0.215 0.785 +1 73 0.341 0.659 +1 201 0.206 0.794 +1 74 0.300 0.700 +1 202 0.209 0.791 +1 75 0.227 0.773 +1 203 0.184 0.816 +1 76 0.259 0.741 +1 204 0.187 0.813 +1 77 0.198 0.802 +1 205 0.178 0.822 +1 78 0.256 0.744 +1 206 0.185 0.815 +1 79 0.187 0.813 +1 207 0.154 0.846 +1 80 0.179 0.821 +1 208 0.169 0.831 +1 81 0.164 0.836 +1 209 0.190 0.810 +1 82 0.176 0.824 +1 210 0.176 0.824 +1 83 0.153 0.847 +1 211 0.208 0.792 +1 84 0.168 0.832 +1 212 0.170 0.830 +1 85 0.154 0.846 +1 213 0.159 0.841 +1 86 0.131 0.869 +1 214 0.175 0.825 +1 87 0.143 0.857 +1 215 0.210 0.790 +1 88 0.145 0.855 +1 216 0.167 0.833 +1 89 0.145 0.855 +1 217 0.174 0.826 +1 90 0.127 0.873 +1 218 0.168 0.832 +1 91 0.131 0.869 +1 219 0.150 0.850 +1 92 0.120 0.880 +1 220 0.139 0.861 +1 93 0.091 0.909 +1 221 0.134 0.866 +1 94 0.106 0.894 +1 222 0.152 0.848 +1 95 0.093 0.907 +1 223 0.136 0.864 +1 96 0.093 0.907 +1 224 0.133 0.867 +1 97 0.093 0.907 +1 225 0.114 0.886 +1 98 0.086 0.914 +1 226 0.079 0.921 +1 99 0.088 0.912 +1 227 0.080 0.920 +1 100 0.093 0.907 +1 228 0.082 0.918 +1 101 0.085 0.915 +1 229 0.099 0.901 +1 102 0.106 0.894 +1 230 0.079 0.921 +1 103 0.089 0.911 +1 231 0.098 0.902 +1 104 0.084 0.916 +1 232 0.103 0.897 +1 105 0.085 0.915 +1 233 0.097 0.903 +1 106 0.096 0.904 +1 234 0.120 0.880 +1 107 0.126 0.874 +1 235 0.111 0.889 +1 108 0.116 0.884 +1 236 0.126 0.874 +1 109 0.120 0.880 +1 237 0.121 0.879 +1

[32]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F Sign Test - Diesel Generator Service Water Supply Pipe (continued)

SOF SOF

  1. 1-Ws Sign # 1-Ws Sign (Ws) (Ws) 110 0.160 0.840 +1 238 0.119 0.881 +1 111 0.149 0.851 +1 239 0.142 0.858 +1 112 0.156 0.844 +1 240 0.182 0.818 +1 113 0.186 0.814 +1 241 0.177 0.823 +1 114 0.171 0.829 +1 242 0.179 0.821 +1 115 0.173 0.827 +1 243 0.183 0.817 +1 116 0.150 0.850 +1 244 0.188 0.812 +1 117 0.134 0.866 +1 245 0.202 0.798 +1 118 0.159 0.841 +1 246 0.144 0.856 +1 119 0.115 0.885 +1 247 0.138 0.862 +1 120 0.064 0.936 +1 248 0.115 0.885 +1 121 0.086 0.914 +1 249 0.070 0.930 +1 122 0.075 0.925 +1 250 0.087 0.913 +1 123 0.072 0.928 +1 251 0.075 0.925 +1 124 0.066 0.934 +1 252 0.100 0.900 +1 125 0.072 0.928 +1 253 0.068 0.932 +1 126 0.082 0.918 +1 254 0.065 0.935 +1 127 0.102 0.898 +1 255 0.076 0.924 +1 128 0.115 0.885 +1 256 0.087 0.913 +1 Number of positive differences (S+) 256 Critical Value 141 The Survey Unit MEETS the Acceptance Criteria

[33]

ATTACHMENT 4 QC DATA

[34]

FSS RELEASE RECORD DIESEL GENERATOR HEAT EXCHANGERS SERVICE WATER SUPPLY AND SERVICE WATER RETURN BURIED PIPE SURVEY UNIT 00101F DIESEL GENERATOR SERVICE WATER SUPPLY - QC AGREEMENT Survey Unit # 00101F Survey Unit Name Diesel Generator Service Water Supply Buried Pipe Sample Plan # S3-00101A Sample

Description:

Comparison of replicate gross-gamma measurements for QC from Pipe AO positions 12, 30, 19 and 6, Pipe AO positions 15, 31, 20 and 8, Pipe AO positions 8, 13, 30, 20 and 7 and from Pipe AO positions 15, 31, 21 and 4.

STANDARD DUPLICATE ID ACTIVITY +20% -20% ID ACTIVITY ACCEPTABLE (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (Y/N)

Pipe AO-27, 12 ft 3.99E+03 4.79E+03 3.19E+03 Pipe AO-27, 12 QC 3.38E+03 Y Pipe AO-27, 30 ft 9.31E+03 1.12E+04 7.45E+03 Pipe AO-27, 30 QC 9.99E+03 Y Pipe AO-27, 19 ft 5.23E+03 6.28E+03 4.18E+03 Pipe AO-27, 19 QC 3.15E+03 N Pipe AO-27, 6 ft 2.10E+03 2.52E+03 1.68E+03 Pipe AO-27, 6 QC 2.14E+03 Y Pipe AO-28, 15 ft 3.21E+03 3.86 E+03 2.57E+03 Pipe AO-28, 15 QC 3.75E+03 Y Pipe AO-28, 31 ft 8.33E+03 9.99E+03 6.66E+03 Pipe AO-28, 31 QC 8.07E+03 Y Pipe AO-28, 20 ft 2.36E+03 2.83E+03 1.89E+03 Pipe AO-28, 20 QC 2.53E+03 Y Pipe AO-28, 8 ft 3.89E+03 4.67E+03 3.11E+03 Pipe AO-28, 8 QC 3.52E+03 Y Pipe AO-30, 8 ft 2.35E+03 2.81E+03 1.88E+03 Pipe AO-30, 8 QC 2.56E+03 Y Pipe AO-30, 13 ft 3.00E+03 3.60E+03 2.40E+03 Pipe AO-30, 13 QC 3.61E+03 Y Pipe AO-30, 30 ft 3.31E+03 3.97E+03 2.65E+03 Pipe AO-30, 30 QC 3.64E+03 Y Pipe AO-30, 20 ft 2.56E+03 3.07E+03 2.04E+03 Pipe AO-30, 20 QC 2.32E+03 Y Pipe AO-30, 7 ft 2.77E+03 3.33E+03 2.22E+03 Pipe AO-30, 7 QC 3.08E+03 Y Pipe AO-31, 15 ft 4.53E+03 5.43E+03 3.62E+03 Pipe AO-31, 15 QC 4.36E+03 Y Pipe AO-31, 31 ft 4.53E+03 5.43E+03 3.62E+03 Pipe AO-31, 31 QC 4.88E+03 Y Pipe AO-31, 21 ft 3.08E+03 3.70E+03 2.46E+03 Pipe AO-31, 21 QC 3.19E+03 Y Pipe AO-31, 4 ft 1.66E+03 1.99E+03 1.33E+03 Pipe AO-31, 4 QC 1.64E+03 Y Comments/Corrective Actions: Using the acceptance criteria The acceptance criteria for replicate static measurements and specified in section 4.1.2 of ZS-LT-01, there was acceptable scan surveys is that the same conclusion is reached for each agreement between the replicate measurements and the original measurement. That is defined as + 20% of the standard.

measurement in 15 of the 17 comparisons. Two (2) QC measurements did not fall within 20% of the original measurement.

For pipe AO-30, the 19 ft. measurement was approximately 40%

less than the original measurement. For pipe AO-30, the 13 ft.

measurement was 20.3% greater than the original measurement.

All measurements were well below 50% of the DCGL and the instrument and detector passed the post use response check.

No further action was deemed necessary.

[35]

Retrieved from "https://kanterella.com/w/index.php?title=ML19338B785&oldid=2266637"