ML20006D478

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Lacrossesolutions, LLC - Final Status Survey Report - Phase 2, Administration Building, Survey Unit B2-010-103
ML20006D478
Person / Time
Site: La Crosse  File:Dairyland Power Cooperative icon.png
Issue date: 12/12/2019
From: Giza P
LaCrosseSolutions
To:
Office of Nuclear Material Safety and Safeguards
Shared Package
ML20006D756 List:
References
LC-2019-0051 B2-010-103
Download: ML20006D478 (84)
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LA CROSSE BOILING WATER REACTOR FINAL STATUS SURVEY RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103

12/12/2019 FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 TABLE OF CONTENTS

1. EXECUTIVE

SUMMARY

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

2. SURVEY UNIT DESCRIPTION ....................................................................................................................... 5
3. CLASSIFICATION BASIS ................................................................................................................................. 6
4. DATA QUALITY OBJECTIVES (DQO) .......................................................................................................... 7
5. SURVEY DESIGN ............................................................................................................................................. 10
6. SURVEY IMPLEMENTATION ...................................................................................................................... 16
7. SURVEY RESULTS .......................................................................................................................................... 17
8. QUALITY CONTROL ...................................................................................................................................... 28
9. INVESTIGATIONS AND RESULTS .............................................................................................................. 29
10. REMEDIATION AND RESULTS ................................................................................................................... 29
11. CHANGES FROM THE FINAL STATUS SURVEY PLAN ........................................................................ 29
12. DATA QUALITY ASSESSMENT (DQA) ....................................................................................................... 29
13. ANOMALIES ..................................................................................................................................................... 30
14. CONCLUSION .................................................................................................................................................. 30
15. REFERENCES................................................................................................................................................... 30
16. ATTACHMENTS .............................................................................................................................................. 30 ATTACHMENT 1 - FIGURES AND MAPS ............................................................................................................. 32 ATTACHMENT 2 - SCAN DATA ............................................................................................................................. 40 ATTACHMENT 3 - SIGN TEST ............................................................................................................................... 46 ATTACHMENT 4 - QUALITY CONTROL ASSESSMENT ...................................................................................... 51 ATTACHMENT 5 - GRAPHICAL PRESENTATIONS ............................................................................................. 53 ATTACHMENT 6 - LUDLUM 2350-1 DOWNLOAD REPORTS ............................................................................ 57 2

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 LIST OF TABLES Table 4 Dose Significant Radionuclides and Mixture for Above Grade Buildings ........................................... 8 Table 4 Base Case DCGLs for Above Grade Buildings (DCGL AGB) .................................................................. 9 Table 4 Operational DCGLs for Above Grade Buildings (OpDCGLAGB) ....................................................... 10 Table 5 Survey Unit B2-010-103 Measurement Designations........................................................................... 12 Table 5 Investigation Levels ................................................................................................................................ 15 Table 5 Synopsis of Survey Design...................................................................................................................... 16 Table 7 Synopsis of Scan Results ........................................................................................................................ 18 Table 7 Detector Efficiencies ............................................................................................................................... 23 Table 7 Summary of Systematic, Judgmental, and QC Static Measurements ................................................ 23 Table 7 Basic Statistical Properties of Systematic Measurement Population .................................................. 28 Table 16 Survey Unit B2-010-103 Complete Scan Data .................................................................................... 41 Table 16 Survey Unit B2-010-103 Sign Test ....................................................................................................... 47 Table 16 Survey Unit B2-010-103 QC Assessment ............................................................................................ 52 LIST OF FIGURES Figure 16 Survey Unit B2-010-103 Exterior Systematic and Judgmental Measurement Locations Map .... 33 Figure 16 Survey Unit B2-010-103 Interior First Floor Systematic Measurement Locations Map .............. 34 Figure 16 Survey Unit B2-010-103 Interior First Floor Ceiling Systematic Measurement Locations Map . 35 Figure 16 Survey Unit B2-010-103 Interior First Floor Wall Systematic Measurement Locations Map ..... 36 Figure 16 Survey Unit B2-010-103 Interior 2nd Floor Systematic and Judgmental Measurement Locations Map ..................................................................................................................................................................... 37 Figure 16 Survey Unit B2-010-103 Interior 2nd Floor Ceiling Systematic and Judgmental Measurement Locations Map .................................................................................................................................................... 38 Figure 16 Survey Unit B2-010-103 Interior 2nd Floor Wall Systematic and Judgmental Measurement Locations Map .................................................................................................................................................... 39 Figure 16 Quantile Plot for Gross Activity ........................................................................................................ 54 Figure 16 Histogram for Gross Activity ............................................................................................................. 55 Figure 16 Retrospective Power Curve .............................................................................................................. 56 3

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 LIST OF ACRONYMS AND ABBREVIATIONS ALARA As Low As Reasonably Achievable ASP Alarm Set Point DQA Data Quality Assessment DQO Data Quality Objective DCGL Derived Concentration Guideline Level DCGLAGB Above Grade Building Derived Concentration Guideline Level FSS Final Status Survey GPS Global Positioning System HSA Historical Site Assessment IC Insignificant Contributors LACBWR La Crosse Boiling Water Reactor LBGR Lower Bound of the Gray Region LTP License Termination Plan MARSSIM Multi-Agency Radiation Survey and Site Investigation Manual MDC Minimum Detectable Concentration MDCR Minimal Detectable Count Rate OpDCGLAGB Above Grade Building Operational Derived Concentration Guideline Level QAPP Quality Assurance Project Plan QC Quality Control ROC Radionuclides of Concern SOF Sum-of-Fraction TEDE Total Effective Dose Equivalent UBGR Upper Bound of the Gray Region UCL Upper Confidence Limit URS Unconditional Release Survey USNRC Unites States Nuclear Regulatory Commission 4

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103

1. EXECUTIVE

SUMMARY

This Final Status Survey (FSS) Release Record for survey unit B2-010-103, La Crosse Boiling Water Reactor (LACBWR) Administration Building, has been generated in accordance with LaCrosseSolutions procedure LC-FS-PR-009, Final Status Survey Data Reporting (Reference 1) and satisfies the requirements of Section 5.11 of the La Crosse Boiling Water Reactor License Termination Plan (LACBWR LTP) (Reference 2).

An FSS sample plan for this survey unit was developed in accordance with LaCrosseSolutions procedures LC-FS-PR-015, Final Status Surveys for Structures (Reference 3), LC-FS-PR-002 and Final Status Survey Package Development (Reference 4), the LACBWR LTP, and with guidance from NUREG-1575, Revision 1, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (Reference 5).

This above grade building survey unit has a MARSSIM classification of 2. A survey 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. As a systematic measurement population, one hundred and twelve (112) static beta measurements were acquired from the survey unit. In addition, surface scanning was performed on approximately 25% of the total surface area in the survey unit. The data assessment results for survey unit B2-010-103 indicate that the maximum gross activity among systematic measurements is equal to 1,199 dpm/100 cm2, which is 37.93% of the Adjusted Gross Operational Derived Concentration Guideline Level (DCGL) for above grade buildings (see Section 5 of this release record for the calculations of adjusted gross DCGLs). Therefore, the null hypothesis of the Sign test is rejected, and survey unit B2-010-103 is acceptable for unrestricted release. The mean gross activity among systematic measurements is equal to 113 dpm/100 cm2, which is 0.57% of the Adjusted Gross Base Case DCGL. Multiplying this fraction by 25 mrem/yr results in a dose for the survey unit of 0.1426 mrem/yr.

2. SURVEY UNIT DESCRIPTION B2-010-103 is an impacted Class 2 above grade building survey unit. The facility has historically been used for office space and records storage. It also housed an environmental lab to support the LACBWR and Genoa 3 Coal Plant operations. The total surface area of the survey unit is approximately 5,433 m2. Refer to Attachment 1 of this report for figures and maps depicting survey unit B2-010-103.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103

3. CLASSIFICATION BASIS Based on the La Crosse Boiling Water Reactor Historical Site Assessment (HSA)

(Reference 6), survey unit B2-010-103 was identified as a Class 2 structure survey unit.

There are no documented incidents of identified radioactive contamination, radioactive material spills or the use of unsealed radioactive sources in the LACBWR Administration Building. The Administration Building was classified as a Class 2 structure due to its proximity to the LACBWR Site Enclosure (LSE) and its previous occupancy by LACBWR facility workers. In addition, the building had equipment used to conduct whole-body counts.

A characterization survey for the LACBWR Administration Building was performed in 2014, as documented in GG-EO-313196-RS-RP-001, Characterization Survey Report for La Crosse Boiling Water Reactor (Reference 7). The initial survey design for characterization did not call for beta scanning or biased direct alpha/beta measurements; however, following the discovery of a discrete particle on the second floor of the building, additional surveys were performed. Beta scans were conducted on 50% of the accessible floor surfaces in hallways and rooms. Additionally, biased direct alpha/beta and gamma measurements, with a focus on surface areas in rooms and hallways which were stained, discolored, or disturbed, were performed. Beta scans on 10% of the roof surfaces, as well as the acquisition of six (6) random direct and removable contamination samples, were conducted. The roof was surveyed to evaluate the potential for the large, flat, and elevated open air surface to be potentially impacted by atmospheric dispersion of radioactive contamination from past LACBWR operations. The survey plan originally called for obtaining two (2) representative samples of sediments from drain lines in the facility.

However, this was not accomplished as the cleanout areas of the drain systems were not readily accessible without excavation. As an alternative, floor and sink drains in the mechanical rooms, environmental lab, and a restroom were surveyed, with direct and removable contamination surveys for alpha and beta/gamma. The results of the beta scans of carpet, laminated wood, and 12 by 12 tile surfaces inside the structure ranged from 1,420 dpm/100 cm2 to 2,710 dpm/100 cm2 with a scan MDC of 2,000 dpm/100cm2. The results of beta scans of glazed type tiles located on the first floor, in and around the access control area, ranged from 3,876 dpm/100 cm2 to 4,915 dpm/100cm2 with a scan MDC of 2,100dpm/100 cm2. Gamma spectroscopy was performed on a non-impacted sample of the glazed tile and it exhibited a significant presence of uranium and thorium NORM.

Additionally, during the beta scan survey of the second floor, a small elevated area was noted outside an office location on 12 by 12 tiles which were subsequently quantified with a hand held beta-gamma detector direct measurement to show contamination levels 6

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 nearing 6,000 dpm/100 cm2. The area and its control were turned over to the licensee for management.

The area of concern was verified to be a discrete radioactive particle (DRP) in the 12 by 12 tile that was removed by the licensee. The DRP was verified by the on-site gamma spectroscopy unit to be an approximately 0.005 uCi discrete particle containing Cs-137. A total of ten (10) direct biased direct surveys were subsequently taken on the first and second floor laminated wood, carpet, and 12 by 12 tile areas.

The results of the surveys showed all the beta-gamma and alpha direct results were well below 50% of the action levels for structural surfaces.

The two (2) direct beta-gamma and alpha measurements on the glazed tile results demonstrated that the beta-gamma were less than 50% of the action levels for structural surfaces but were elevated at higher levels due to the presence of NORM.

The elevated alpha on the glazed tile were due to the tiles content of natural thorium and uranium series radionuclides.

The scan survey results of 10% of the roof area indicated results ranging from 1,872 dpm/100 cm2 to 2,261 dpm/100 cm2, which are well below 50% of the action level.

The direct alpha measurements were elevated with an average measurement of 112 dpm/100 cm2 and a maximum measurement of 152 dpm/100 cm2.

Direct and removable contamination surveys were performed on nine (9) sink and floor drains. The survey results indicated no residual radioactivity exceeding 50% of the structural surface action level. Results of the survey are presented in GG-EO-313196-RS-RP-001, Characterization Survey Report for La Crosse Boiling Water Reactor.

Based upon review of the historical information, the results of the characterization survey data, and completion of a final Survey Unit Classification Worksheet, the correct final classification of survey unit B2-010-103 was determined to be Class 2.

4. DATA QUALITY OBJECTIVES FSS planning and design relies on a properly executed 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, utilized in accordance with MARSSIM, is described in the LACBWR LTP. The appropriate design for a given survey was developed using the DQO process as outlined in Appendix D of MARSSIM.

The DQO process incorporated hypothesis testing and probabilistic sampling distributions to control decision errors during data analysis. Hypothesis testing is a process based on the scientific method that compares a baseline condition to an alternate condition. The baseline condition is technically known as the null hypothesis. Hypothesis testing rests on the 7

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 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 B2-010-103 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).

LaCrosseSolutions TSD RS-TD-313196-001, Radionuclides of Concern during LACBWR Decommissioning (Reference 8) established the basis for an initial suite of potential ROC for decommissioning. Insignificant contributors (IC) were determined consistent with the guidance contained in Section 3.3 of NUREG-1757, Volume 2, Revision 1, Consolidated Decommissioning Guidance - Characterization, Survey, and Determination of Radiological Criteria, Final Report (Reference 9). In all soil and concrete scenarios, Cs-137, Co-60, Sr-90, Eu-152 and Eu-154 contribute nearly 100% of the total dose. The remaining radionuclides were designated as IC and were eliminated from further detailed evaluation. Therefore, the final ROCs for LACBWR above grade buildings, soil, basement concrete, and buried piping are Cs-137, Co-60, Sr-90, Eu-152 and Eu-154.

The LTP, Section 6.14.1 discusses the process used to derive the ROC for the decommissioning of LACBWR, including the elimination of IC from the initial suite.

Table 4-1 presents the ROC for the decommissioning of above grade buildings at LACBWR and the normalized mixture fractions based on the radionuclide mixture.

Table 4 Dose Significant Radionuclides and Mixture for Above Grade Buildings Fraction of Total Activity Radionuclide (normalized)(1)

Co-60 0.0644 Sr-90 0.0981 Cs-137 0.829 Eu-152 0.00549 Eu-154 0.00281 (1) Based on maximum percent of total activity from Table 22 of RS-TD-313196-001, normalized to one for the dose significant radionuclides.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 LTP, Section 5.2 states that 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/yr to an Average Member of the Critical Group. 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/yr 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 LC-FS-TSD-002, Operational Derived Concentration Guideline Levels for Final Status Survey (Reference 10).

At LACBWR, compliance is demonstrated through the summation of dose from five (5) distinct source terms (i.e., basements, soils, buried pipe, above grade buildings, and groundwater) for the end-state. When applied to above grade buildings, the DCGLs are expressed in units of activity per surface area (dpm/100 cm2).

The Screening Values in NUREG-1757, Volume 2, Revision 1, Consolidated Decommissioning Guidance - Characterization, Survey, and Determination of Radiological Criteria, Final Report, Table H-1, are applied to the FSS of above grade buildings. The Table H-1 Screening Values are presented as Base Case DCGLs (equivalent to 25 mrem/yr) and are reproduced in Table 4-2 below.

Table 4 Base Case DCGLs for Above Grade Buildings (DCGLAGB)

DCGLAGB Radionuclide (dpm/100cm2)

Co-60 7,100 Sr-90 8,700 Cs-137 28,000 Eu-152 12,700 Eu-154 11,500 The Operational DCGLs are then used as the DCGL for the FSS design of the survey unit (calculation of surrogate DCGLs, investigation levels, etc.). The Operational DCGLs for the unrestricted release of above grade buildings are provided in Table 4-3.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 4 Operational DCGLs for Above Grade Buildings (OpDCGLAGB)

OpDCGLAGB Radionuclide (dpm/100cm2)

Co-60 1,136 Sr-90 1,392 Cs-137 4,480 Eu-152 2,032 Eu-154 1,840 Instrument DQOs included a verification of the ability of the survey instrument to detect the radiation(s) of interest relative to the Operational DCGL. Survey instrument response checks were required prior to issuance and after the instrument had been used. Control and accountability of survey instruments was required to assure the quality and prevent the loss of data. The minimum acceptable MDC for measurements obtained using field instruments was 50% of the applicable Operational DCGL.

5. SURVEY DESIGN The level of effort associated with planning a survey is based on the complexity of the survey unit and nature of the hazards. Guidance for preparing FSS plans is provided in procedures LC-FS-PR-015, Final Status Surveys for Structures and LC-FS-PR-002, Final Status Survey Package Development.

For the FSS of above grade buildings, Adjusted Gross DCGLs are calculated. This is done because radionuclide-specific data is not acquired with static measurements. The equation for calculating the Adjusted Gross DCGL is as follows:

Equation 1 1

=

1 2

[( ) + ( ) + ( )]

1 2 Where: DCGLAG = Adjusted Gross DCGL in units of dpm/100 cm2 DCGLi = Gross DCGL for detectable radionuclide in units of dpm/100 cm2 fi = Mixture fraction of detectable radionuclides 10

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Using Equation 1, and values within Tables 4-1 and 4-3, the Adjusted Gross Operational DCGL was calculated as follows:

Equation 2 1

=

0.0644 0.0981 0.829 0.00549 0.00281

[(1136 ) + (1392 ) + (4480 ) + (2032 ) + (1840 )]

(60) (90) (137) (152) (154)

= 3160 /100 2 The Adjusted Gross Operational DCGL was calculated as 3,160 dpm/100 cm2, which was the action level for survey unit B2-010-103.

Using Equation 1, and values within Tables 4-1 and 4-2, the Adjusted Gross Base Case DCGL was calculated as follows:

Equation 3 1

=

0.0644 0.0981 0.829 0.00549 0.00281

[(7100 )+( )+( )+( )+( )]

(60) 8700 (90) 28000 (137) 12700 (152) 11500 (154)

= 19751 /100 2 The Adjusted Gross Base Case DCGL was calculated as 19,751 dpm/100 cm2. The mean activity from the FSS systematic measurements is compared to the Adjusted Gross Base Case DCGL, and the dose contribution from the survey unit is calculated.

The Sign test was selected as the nonparametric statistical test for compliance with the release criteria. The number of measurements for use with the Sign test was determined in accordance with procedures LC-FS-PR-002 and LC-FS-PR-015. The relative shift (/) for the survey unit data set is defined as shift (), which is the Upper Boundary of the Gray Region (UBGR), or the DCGL, minus the Lower Bound of the Gray Region (LBGR),

divided by sigma (), which is the standard deviation of the data set used for survey design.

The optimal value for / should range between one (1) and three (3). The largest value the

/ can have is three (3). If the calculated value of / exceeds three (3), an adjusted value of three (3) will be used for /. The / for survey unit B2-010-103, based on data from characterization of the LACBWR Administration Building, was calculated as follows:

Equation 4

/ = 3160/518 = 5.16 11

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 As the calculated relative shift was greater than three (3), a value of three (3) was used as the adjusted /. Both the Type I error (i.e., value) and the Type II error (i.e., value) was set at 0.05. The sample size from Table 5.5 of MARSSIM that equates to the Type I and Type II error of 0.05 for use with the Sign test is an N value of fourteen (14). One hundred and twelve (112) total systematic measurements (84 interior and 28 exterior) were included in the survey design for survey unit B2-010-103. This was done because the total surface area of the survey unit surpasses the recommended Class 2 structure survey unit size from Table 1 in MARSSIM. The survey unit was split into eight (8) areas, with 14 required compliance measurements each, to accommodate the MARSSIM recommended survey unit size restrictions.

A Prospective Power Curve was generated using COMPASS, a software package developed under the sponsorship of the United States Nuclear Regulatory Commission (USNRC) for implementation of the MARSSIM in support of the decommissioning license termination rule (10CFR20, Subpart E). The result of the COMPASS computer run showed adequate power for the survey design.

As the survey unit was designated Class 2, measurement locations were selected based on a systematic grid with a random starting point. The systematic locations of the static measurements were selected using Visual Sample Plan (VSP). Input parameters included the use of survey unit drawings and the systematic sampling tool set with a predetermined number of measurement locations. The systematic measurement locations were identified in the field using dimension parameters provided on the survey unit map (see Attachment 1). Table 5-1 lists the systematic, judgmental, and QC measurements collected for FSS of survey unit B2-010-103.

Table 5 Survey Unit B2-010-103 Measurement Designations Measurement ID B2-010-103-FSFO-A01-BD B2-010-103-FSWO-F11-BD B2-010-103-FSFO-A02-BD B2-010-103-FSWO-F12-BD B2-010-103-FSFO-A03-BD B2-010-103-FSWO-F13-BD B2-010-103-FSFO-A04-BD B2-010-103-FSWO-F14-BD B2-010-103-FSFO-A05-BD B2-010-103-FSRO-G01-BD B2-010-103-FSFO-A06-BD B2-010-103-FSRO-G02-BD B2-010-103-FSFO-A07-BD B2-010-103-FSRO-G03-BD B2-010-103-FSFO-A08-BD B2-010-103-FSRO-G04-BD B2-010-103-FSFO-A09-BD B2-010-103-FSRO-G05-BD B2-010-103-FSFO-A10-BD B2-010-103-FSRO-G06-BD 12

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Measurement ID B2-010-103-FSFO-A11-BD B2-010-103-FSRO-G07-BD B2-010-103-FSFO-A12-BD B2-010-103-FSRO-G08-BD B2-010-103-FSFO-A13-BD B2-010-103-FSRO-G09-BD B2-010-103-FSFO-A14-BD B2-010-103-FSRO-G10-BD B2-010-103-FSCC-B01-BD B2-010-103-FSWO-G11-BD B2-010-103-FSCC-B02-BD B2-010-103-FSRO-G12-BD B2-010-103-FSCC-B03-BD B2-010-103-FSWO-G13-BD B2-010-103-FSCC-B04-BD B2-010-103-FSRO-G14-BD B2-010-103-FSCC-B05-BD B2-010-103-FSRO-H01-BD B2-010-103-FSCC-B06-BD B2-010-103-FSRO-H02-BD B2-010-103-FSCC-B07-BD B2-010-103-FSRO-H03-BD B2-010-103-FSCM-B08-BD B2-010-103-FSRO-H04-BD B2-010-103-FSCM-B09-BD B2-010-103-FSRO-H05-BD B2-010-103-FSCM-B10-BD B2-010-103-FSWO-H06-BD B2-010-103-FSCM-B11-BD B2-010-103-FSWO-H07-BD B2-010-103-FSCM-B12-BD B2-010-103-FSWO-H08-BD B2-010-103-FSCM-B13-BD B2-010-103-FSWO-H09-BD B2-010-103-FSCM-B14-BD B2-010-103-FSWO-H10-BD B2-010-103-FSWB-C01-BD B2-010-103-FSWO-H11-BD B2-010-103-FSWO-C02-BD B2-010-103-FSWO-H12-BD B2-010-103-FSWB-C03-BD B2-010-103-FSWO-H13-BD B2-010-103-FSWB-C04-BD B2-010-103-FSWO-H14-BD B2-010-103-FSWB-C05-BD B2-010-103-FQFO-A09-BD B2-010-103-FSWO-C06-BD B2-010-103-FQCM-B13-BD B2-010-103-FSWB-C07-BD B2-010-103-FQWB-C13-BD B2-010-103-FSWB-C08-BD B2-010-103-FQFO-D02-BD B2-010-103-FSWB-C09-BD B2-010-103-FQFO-A21-BD B2-010-103-FSWO-C10-BD B2-010-103-FQFC-D20-BD B2-010-103-FSWB-C11-BD B2-010-103-FQSM-B16-BD B2-010-103-FSWB-C12-BD B2-010-103-FQSM-E19-BD B2-010-103-FSWB-C13-BD B2-010-103-FQSM-B21-BD B2-010-103-FSWB-C14-BD B2-010-103-FJFO-A15-BD 13

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Measurement ID B2-010-103-FSFO-D01-BD B2-010-103-FJFO-A16-BD B2-010-103-FSFO-D02-BD B2-010-103-FJFO-A17-BD B2-010-103-FSFO-D03-BD B2-010-103-FJFO-A18-BD B2-010-103-FSFO-D04-BD B2-010-103-FJFO-A19-BD B2-010-103-FSFO-D05-BD B2-010-103-FJCM-B15-BD B2-010-103-FSFW-D06-BD B2-010-103-FJWB-C15-BD B2-010-103-FSFW-D07-BD B2-010-103-FJFO-D15-BD B2-010-103-FSFO-D08-BD B2-010-103-FJFO-D18-BD B2-010-103-FSFO-D09-BD B2-010-103-FJFO-D19-BD B2-010-103-FSFO-D10-BD B2-010-103-FJFO-A21-BD B2-010-103-FSFO-D11-BD B2-010-103-FJFO-A22-BD B2-010-103-FSFO-D12-BD B2-010-103-FJFO-A23-BD B2-010-103-FSFO-D13-BD B2-010-103-FJFO-D20-BD B2-010-103-FSFO-D14-BD B2-010-103-FJFO-D21-BD B2-010-103-FSCO-E01-BD B2-010-103-FJCM-E06-BD B2-010-103-FSCO-E02-BD B2-010-103-FJCM-E15-BD B2-010-103-FSCO-E03-BD B2-010-103-FJWO-F05-BD B2-010-103-FSCO-E04-BD B2-010-103-FJWO-F15-BD B2-010-103-FSCO-E05-BD B2-010-103-FJSO-C16-BD B2-010-103-FSCM-E06-BD B2-010-103-FJRO-G06-BD B2-010-103-FSCM-E07-BD B2-010-103-FJWO-G15-BD B2-010-103-FSCM-E08-BD B2-010-103-FJWO-H08-BD B2-010-103-FSCM-E09-BD B2-010-103-FJWO-H15-BD B2-010-103-FSCM-E10-BD B2-010-103-FJSC-A16-BD B2-010-103-FSCM-E11-BD B2-010-103-FJSC-D16-BD B2-010-103-FSCM-E12-BD B2-010-103-FJSM-B16-BD B2-010-103-FSCM-E13-BD B2-010-103-FJSM-B17-BD B2-010-103-FSCM-E14-BD B2-010-103-FJSM-B18-BD B2-010-103-FSWO-F01-BD B2-010-103-FJSM-B19-BD B2-010-103-FSWO-F02-BD B2-010-103-FJSM-B20-BD B2-010-103-FSWO-F03-BD B2-010-103-FJSM-B21-BD B2-010-103-FSWO-F04-BD B2-010-103-FJSM-B22-BD 14

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Measurement ID B2-010-103-FSWO-F05-BD B2-010-103-FJSM-E16-BD B2-010-103-FSWO-F06-BD B2-010-103-FJSM-E17-BD B2-010-103-FSWO-F07-BD B2-010-103-FJSM-E18-BD B2-010-103-FSWO-F08-BD B2-010-103-FJSM-E19-BD B2-010-103-FSWO-F09-BD B2-010-103-FJSM-E20-BD B2-010-103-FSWO-F10-BD B2-010-103-FJSM-E21-BD The implementation of quality control measures as referenced in LTP, Section 5.9 and LaCrosseSolutions LC-QA-PN-001, Final Status Survey Quality Assurance Project Plan (QAPP) (Reference 11) includes the collection of a replicate measurement on 5% of the measurements collected in a survey unit, with the locations selected at random. Thirteen (13) replicate measurements, B2-010-103-FQFO-A09-BD, B2-010-103-FQCM-B13-BD, B2-010-103-FQWB-C13-BD, B2-010-103-FQFO-D02-BD, B2-010-103-FQCM-E06-BD, B2-010-103-FQWO-F05-BD, B2-010-103-FQRO-G06-BD, B2-010-103-FQWO-H08-BD, B2-010-103-FQFO-A21-BD, B2-010-103-FQFC-D20-BD, B2-010-103-FQSM-B16-BD, B2-010-103-FQSM-E19-BD, and B2-010-103-FQSM-B21-BD were selected at random for the QC replicate measurement analysis for the FSS of this survey unit.

The LTP, Section 5.6.4.4 and Table 5-15 specifies that for Class 2 structure survey units, systematic and judgmental surface scans will be performed on 10% to 100% of the surface area in the survey unit. For survey unit B2-010-103, 25% scan coverage was selected for the floor and walls, and 10% coverage was selected for the ceilings. This coverage equates to total scan coverage of 1,230 m2. One hundred and forty-seven (147) scan areas (one [1]

scan area at each systematic measurement location and thirty-five [35] judgmental scan areas), equating to 1,345 m2, were established. Refer to Attachment 1 for figures and maps depicting the measurement and scan locations in survey unit B2-010-103.

For this Class 2 structure survey unit, the Investigation Levels for area scanning and direct measurement results are those levels specified in the LTP, Table 5-16, and are reproduced below in Table 5-2.

Table 5 Investigation Levels Direct Investigation Classification Scan Investigation Levels Levels

>Operational DCGL or >MDCscan if Class 2 MDCscan is greater than Operational >Operational DCGL DCGL Table 5-3 provides a synopsis of the survey design for survey unit B2-010-103.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 5 Synopsis of Survey Design Feature Design Criteria Basis Survey Unit Surface Area 5,433m2 Building Dimensions

= 518 UBGR = 3,160 Number of Systematic 112 LBGR =489 Measurements (N) Type I & II error = 0.05

/ = 3 (adjusted)

MARSSIM Table 5.5 Adjusted Gross 2

DCGL/Action Level 3,160 dpm/100 cm Operational DCGL (Equation 2)

Direct Investigation Level >Operational DCGL LTP, Table 5-16

>Operational DCGL or Scan Investigation Level LTP, Table 5-16

>MDCscan 1,345 m2 (112 systematic LTP, Table 5-15 Scan Areal Coverage and 35 judgmental scan Actual Scan Coverage areas) or ~25%

8 Per Survey Design Judgmental Measurements 35 Actual Number Obtained 8 replicate measurements LTP, Section 5.9 QC selected at random locations Actual Number Obtained 13

6. SURVEY IMPLEMENTATION For survey unit B2-010-103, compliance with the unrestricted release criteria was demonstrated through a combination of surface scanning and surface static measurements with a Ludlum Model 44-116 beta/gamma detector.

An FSS Supervisor performed a visual inspection and walk-down of the survey unit during the Unconditional Release Survey (URS) that was performed prior to 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. At the time of FSS, the interior and exterior of the building was dry and reasonably free of debris. No conditions prohibited the proper collection of static and scan measurements.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 FSS field activities were conducted under the FSS Sample Plan, which included DQOs, survey design, detailed FSS instructions, job safety analysis, and related procedures for reference. FSS field activities were projected to take four (4) working days to complete.

Daily briefings were conducted to discuss the expectations for job performance and to review safety aspects of the job. A Field Log was used to document field activities and other information pertaining to the performance of the FSS. FSS field activities commenced on October 9, 2019, and were concluded on October 16, 2019.

A total of one hundred and forty-seven (147) different scan areas, constituting an areal coverage of 1,345 m2 were scanned using a Ludlum 2350-1 paired with a Ludlum Model 44-116 detector (125 cm2 detector area). The background was established as the average of five (5) 1-minute static measurements, while maintaining the detector waist high. In survey unit B2-010-103, background ranged from 195 cpm up to 400 cpm.

All designated scan areas were scanned using a Ludlum 2350-1 paired with a Model 44-116 beta/gamma detector operated in the rate-meter mode and using audio response. The probe was positioned as close to the surface as possible and was moved at a scan speed of approximately one (1) detector width per second. Scan MDC was sufficient to detect residual radioactivity at the action level of 3,160 dpm/100cm2 (Adjusted Gross Operational DCGL). Complete scan results are provided in Attachment 2.

The one hundred and twelve (112) systematic static measurement locations were marked based on the dimensions provided on the survey map. Thirty-five (35) judgmental measurement locations were selected and marked as per the sample plan. Using the Ludlum 2350-1 paired with a Model 44-116 detector, a 1-minute static measurement was acquired at the location of highest scan indication within each systematic and judgmental scan area.

The implementation of survey specific QC measures included the collection of eight (8) replicate static measurements for QC analysis.

7. SURVEY RESULTS All areas identified in the FSS plan were scanned for elevated activity levels. No alarms were produced during the scanning of survey unit B2-010-103. Table 7-1 provides an overview of the scan results. Complete scan results are provided in Attachment 2.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 7 Synopsis of Scan Results Highest Action # of Scan Logged Investigation Level(1) Scan Area Reading Measurements Alarms (cpm) (cpm)

A01 576 592 0 0 A02 550 592 0 0 A03 589 592 0 0 A04 735 820 0 0 A05 568 592 0 0 A06 587 592 0 0 A07 503 592 0 0 A08 573 592 0 0 A09 436 592 0 0 A09 QC 343 578 0 0 A10 813 820 0 0 A11 817 820 0 0 A12 546 592 0 0 A13 562 592 0 0 A14 533 592 0 0 A15J 505 592 0 0 A17 757 775 0 0 A18 560 775 0 0 A19 435 475 0 0 A20 436 475 0 0 B01 424 673 0 0 B02 330 673 0 0 B03 395 673 0 0 B04 314 673 0 0 B05 384 673 0 0 B06 497 673 0 0 B07 380 673 0 0 B08 545 668 0 0 B09 593 668 0 0 B10 620 668 0 0 B11 622 668 0 0 B12 556 668 0 0 B13 499 668 0 0 18

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Action # of Scan Logged Investigation Level(1) Scan Area Reading Measurements Alarms (cpm) (cpm)

B13 QC 474 537 0 0 B14 606 668 0 0 B15J 566 673 0 0 C01 656 670 0 0 C02 612 670 0 0 C03 540 670 0 0 C04 536 670 0 0 C05 622 670 0 0 C06 538 670 0 0 C07 574 670 0 0 C08 591 732 0 0 C09 682 732 0 0 C10 731 732 0 0 C11 731 732 0 0 C12 678 732 0 0 C13 682 732 0 0 C13 QC 421 578 0 0 C14 647 732 0 0 C15 706 732 0 0 D01 443 497 0 0 D02 492 497 0 0 D02 QC 371 656 0 0 D03 395 497 0 0 D04 454 476 0 0 D05 469 476 0 0 D06 428 497 0 0 D07 475 497 0 0 D08 517 581 0 0 D09 525 581 0 0 D10 514 581 0 0 D11 478 497 0 0 D12 473 497 0 0 D13 491 497 0 0 D14 476 497 0 0 19

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Action # of Scan Logged Investigation Level(1) Scan Area Reading Measurements Alarms (cpm) (cpm)

D15 480 497 0 0 D18 718 775 0 0 D19 639 775 0 0 DR01 476 635 0 0 DR01 QC 350 612 0 0 DR02 337 635 0 0 DR03 296 635 0 0 DR04 304 635 0 0 DR05 430 635 0 0 DR20 QC 326 542 0 0 E01 253 542 0 0 E02 327 542 0 0 E03 255 542 0 0 E04 262 542 0 0 E05 245 542 0 0 E06 238 537 0 0 E06 QC 426 507 0 0 E07 255 537 0 0 E08 286 537 0 0 E09 286 537 0 0 E10 265 537 0 0 E11 275 537 0 0 E12 220 537 0 0 E13 224 537 0 0 E14 267 537 0 0 E15 297 537 0 0 F01 606 607 0 0 F02 526 607 0 0 F03 581 607 0 0 F04 575 607 0 0 F05 603 607 0 0 F05 QC 543 656 0 0 F06 586 607 0 0 F07 596 607 0 0 20

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Action # of Scan Logged Investigation Level(1) Scan Area Reading Measurements Alarms (cpm) (cpm)

F08 586 607 0 0 F09 606 607 0 0 F10 568 571 0 0 F11 504 571 0 0 F12 476 628 0 0 F13 530 571 0 0 F14 546 571 0 0 F15 548 571 0 0 FH01 450 520 0 0 G01 411 564 0 0 G02 353 564 0 0 G03 434 564 0 0 G04 372 547 0 0 G05 388 547 0 0 G06 404 547 0 0 G06 QC 546 629 0 0 G07 373 547 0 0 G08 376 547 0 0 G09 406 547 0 0 G10 349 547 0 0 G11 424 547 0 0 G12 423 547 0 0 G13 336 629 0 0 G14 353 629 0 0 G15 347 629 0 0 H01 542 564 0 0 H02 535 564 0 0 H03 505 564 0 0 H04 529 564 0 0 H05 480 564 0 0 H06 381 627 0 0 H07 394 627 0 0 H08 298 627 0 0 H08 QC 550 629 0 0 21

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Action # of Scan Logged Investigation Level(1) Scan Area Reading Measurements Alarms (cpm) (cpm)

H09 358 627 0 0 H10 392 627 0 0 H11 367 627 0 0 H12 370 627 0 0 H13 414 627 0 0 H14 365 627 0 0 H15 425 627 0 0 SK07 458 520 0 0 SK08 450 520 0 0 VT01 448 520 0 0 VT01 QC 303 612 0 0 VT02 472 520 0 0 VT03 438 520 0 0 VT03 QC 304 572 0 0 VT04 459 520 0 0 VT05 462 520 0 0 VT06 458 520 0 0 VT07 470 520 0 0 VT08 484 520 0 0 VT09 491 520 0 0 VT10 473 520 0 0 VT11 513 520 0 0 VT12 379 520 0 0 VT13 405 520 0 0 VT22 QC 356 612 0 0 (1) Action Level for scanning was conservatively based on the average background plus 50% of the Operational DCGL converted to cpm using the detector efficiency.

Ambient background was subtracted from all measurements, then were converted from cpm to dpm/100 cm2 (net cpm divided by detector efficiency) for direct comparison to the Adjusted Gross DCGLs. Table 7-2 below presents the detector efficiencies used for conversions. A summary of the results for the one hundred and twelve (112) systematic static measurements, thirty-five (35) judgmental static measurements, and thirteen (13) QC static measurements is provided in Table 7-3. The basic statistics for the systematic measurement population are summarized in Table 7-4.

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FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 7 Detector Efficiencies44-116 Efficiency Detector # (c/d) 222981 0.1653 223244 0.1698 357009 0.2104 357439 0.2169 Table 7 Summary of Systematic, Judgmental, and QC Static Measurements Gross Activity Fraction of Measurement ID Adjusted Gross (dpm/100 cm2) OpDCGL B2-010-103-FSFO-A01-BD 0 0.0000 B2-010-103-FSFO-A02-BD 200 0.0632 B2-010-103-FSFO-A03-BD 0 0.0000 B2-010-103-FSFO-A04-BD 0 0.0000 B2-010-103-FSFO-A05-BD 452 0.1429 B2-010-103-FSFO-A06-BD 5 0.0015 B2-010-103-FSFO-A07-BD 0 0.0000 B2-010-103-FSFO-A08-BD 0 0.0000 B2-010-103-FSFO-A09-BD 38 0.0120 B2-010-103-FSFO-A10-BD 0 0.0000 B2-010-103-FSFO-A11-BD 0 0.0000 B2-010-103-FSFO-A12-BD 190 0.0602 B2-010-103-FSFO-A13-BD 200 0.0632 B2-010-103-FSFO-A14-BD 0 0.0000 B2-010-103-FSCC-B01-BD 0 0.0000 B2-010-103-FSCC-B02-BD 0 0.0000 B2-010-103-FSCC-B03-BD 0 0.0000 B2-010-103-FSCC-B04-BD 0 0.0000 B2-010-103-FSCC-B05-BD 147 0.0466 B2-010-103-FSCC-B06-BD 0 0.0000 B2-010-103-FSCC-B07-BD 0 0.0000 B2-010-103-FSCM-B08-BD 0 0.0000 B2-010-103-FSCM-B09-BD 0 0.0000 23

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Gross Activity Fraction of Measurement ID Adjusted Gross (dpm/100 cm2) OpDCGL B2-010-103-FSCM-B10-BD 0 0.0000 B2-010-103-FSCM-B11-BD 0 0.0000 B2-010-103-FSCM-B12-BD 0 0.0000 B2-010-103-FSCM-B13-BD 0 0.0000 B2-010-103-FSCM-B14-BD 0 0.0000 B2-010-103-FSWB-C01-BD 0 0.0000 B2-010-103-FSWO-C02-BD 0 0.0000 B2-010-103-FSWB-C03-BD 0 0.0000 B2-010-103-FSWB-C04-BD 0 0.0000 B2-010-103-FSWB-C05-BD 0 0.0000 B2-010-103-FSWO-C06-BD 0 0.0000 B2-010-103-FSWB-C07-BD 0 0.0000 B2-010-103-FSWB-C08-BD 0 0.0000 B2-010-103-FSWB-C09-BD 0 0.0000 B2-010-103-FSWO-C10-BD 0 0.0000 B2-010-103-FSWB-C11-BD 0 0.0000 B2-010-103-FSWB-C12-BD 0 0.0000 B2-010-103-FSWB-C13-BD 0 0.0000 B2-010-103-FSWB-C14-BD 76 0.0241 B2-010-103-FSFO-D01-BD 0 0.0000 B2-010-103-FSFO-D02-BD 0 0.0000 B2-010-103-FSFO-D03-BD 0 0.0000 B2-010-103-FSFO-D04-BD 0 0.0000 B2-010-103-FSFO-D05-BD 0 0.0000 B2-010-103-FSFW-D06-BD 0 0.0000 B2-010-103-FSFW-D07-BD 0 0.0000 B2-010-103-FSFO-D08-BD 0 0.0000 B2-010-103-FSFO-D09-BD 0 0.0000 B2-010-103-FSFO-D10-BD 0 0.0000 B2-010-103-FSFO-D11-BD 0 0.0000 B2-010-103-FSFO-D12-BD 0 0.0000 B2-010-103-FSFO-D13-BD 0 0.0000 B2-010-103-FSFO-D14-BD 0 0.0000 24

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Gross Activity Fraction of Measurement ID Adjusted Gross (dpm/100 cm2) OpDCGL B2-010-103-FSCO-E01-BD 106 0.0336 B2-010-103-FSCO-E02-BD 5 0.0015 B2-010-103-FSCO-E03-BD 41 0.0131 B2-010-103-FSCO-E04-BD 0 0.0000 B2-010-103-FSCO-E05-BD 51 0.0160 B2-010-103-FSCM-E06-BD 0 0.0000 B2-010-103-FSCM-E07-BD 0 0.0000 B2-010-103-FSCM-E08-BD 0 0.0000 B2-010-103-FSCM-E09-BD 0 0.0000 B2-010-103-FSCM-E10-BD 28 0.0088 B2-010-103-FSCM-E11-BD 175 0.0554 B2-010-103-FSCM-E12-BD 0 0.0000 B2-010-103-FSCM-E13-BD 83 0.0263 B2-010-103-FSCM-E14-BD 231 0.0729 B2-010-103-FSWO-F01-BD 0 0.0000 B2-010-103-FSWO-F02-BD 0 0.0000 B2-010-103-FSWO-F03-BD 0 0.0000 B2-010-103-FSWO-F04-BD 0 0.0000 B2-010-103-FSWO-F05-BD 0 0.0000 B2-010-103-FSWO-F06-BD 0 0.0000 B2-010-103-FSWO-F07-BD 0 0.0000 B2-010-103-FSWO-F08-BD 0 0.0000 B2-010-103-FSWO-F09-BD 0 0.0000 B2-010-103-FSWO-F10-BD 0 0.0000 B2-010-103-FSWO-F11-BD 0 0.0000 B2-010-103-FSWO-F12-BD 0 0.0000 B2-010-103-FSWO-F13-BD 0 0.0000 B2-010-103-FSWO-F14-BD 0 0.0000 B2-010-103-FSRO-G01-BD 281 0.0890 B2-010-103-FSRO-G02-BD 0 0.0000 B2-010-103-FSRO-G03-BD 203 0.0642 B2-010-103-FSRO-G04-BD 194 0.0613 B2-010-103-FSRO-G05-BD 0 0.0000 25

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Gross Activity Fraction of Measurement ID Adjusted Gross (dpm/100 cm2) OpDCGL B2-010-103-FSRO-G06-BD 378 0.1196 B2-010-103-FSRO-G07-BD 581 0.1838 B2-010-103-FSRO-G08-BD 369 0.1167 B2-010-103-FSRO-G09-BD 659 0.2086 B2-010-103-FSRO-G10-BD 498 0.1576 B2-010-103-FSWO-G11-BD 0 0.0000 B2-010-103-FSRO-G12-BD 258 0.0817 B2-010-103-FSWO-G13-BD 0 0.0000 B2-010-103-FSRO-G14-BD 632 0.1999 B2-010-103-FSRO-H01-BD 378 0.1196 B2-010-103-FSRO-H02-BD 1,143 0.3618 B2-010-103-FSRO-H03-BD 1,199 0.3793 B2-010-103-FSRO-H04-BD 1,199 0.3793 B2-010-103-FSRO-H05-BD 1,083 0.3428 B2-010-103-FSWO-H06-BD 106 0.0336 B2-010-103-FSWO-H07-BD 69 0.0219 B2-010-103-FSWO-H08-BD 0 0.0000 B2-010-103-FSWO-H09-BD 277 0.0875 B2-010-103-FSWO-H10-BD 226 0.0715 B2-010-103-FSWO-H11-BD 203 0.0642 B2-010-103-FSWO-H12-BD 364 0.1153 B2-010-103-FSWO-H13-BD 0 0.0000 B2-010-103-FSWO-H14-BD 295 0.0934 B2-010-103-FQFO-A09-BD 0 0.0000 B2-010-103-FQCM-B13-BD 0 0.0000 B2-010-103-FQWB-C13-BD 373 0.1182 B2-010-103-FQFO-D02-BD 0 0.0000 B2-010-103-FQFO-A21-BD 0 0.0000 B2-010-103-FQFC-D20-BD 5 0.0015 B2-010-103-FQSM-B16-BD 0 0.0000 B2-010-103-FQSM-E19-BD 81 0.0256 B2-010-103-FQSM-B21-BD 0 0.0000 B2-010-103-FQCM-E06-BD 295 0.0932 26

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Gross Activity Fraction of Measurement ID Adjusted Gross (dpm/100 cm2) OpDCGL B2-010-103-FQWO-F05-BD 0 0.0000 B2-010-103-FQRO-G06-BD 0 0.0000 B2-010-103-FQWO-H08-BD 33 0.0105 B2-010-103-FJFO-A15-BD 114 0.0361 B2-010-103-FJFO-A16-BD 0 0.0000 B2-010-103-FJFO-A17-BD 0 0.0000 B2-010-103-FJFO-A18-BD 103 0.0325 B2-010-103-FJFO-A19-BD 115 0.0364 B2-010-103-FJCM-B15-BD 0 0.0000 B2-010-103-FJWB-C15-BD 0 0.0000 B2-010-103-FJFO-D15-BD 0 0.0000 B2-010-103-FJFO-D18-BD 242 0.0766 B2-010-103-FJFO-D19-BD 224 0.0708 B2-010-103-FJFO-A21-BD 0 0.0000 B2-010-103-FJFO-A22-BD 0 0.0000 B2-010-103-FJFO-A23-BD 0 0.0000 B2-010-103-FJFO-D20-BD 0 0.0000 B2-010-103-FJFO-D21-BD 57 0.0180 B2-010-103-FJCM-E15-BD 46 0.0146 B2-010-103-FJWO-F15-BD 0 0.0000 B2-010-103-FJSO-C16-BD 42 0.0134 B2-010-103-FJWO-G15-BD 0 0.0000 B2-010-103-FJWO-H15-BD 32 0.0102 B2-010-103-FJSC-A16-BD 0 0.0000 B2-010-103-FJSC-D16-BD 0 0.0000 B2-010-103-FJSM-B16-BD 0 0.0000 B2-010-103-FJSM-B17-BD 0 0.0000 B2-010-103-FJSM-B18-BD 0 0.0000 B2-010-103-FJSM-B19-BD 0 0.0000 B2-010-103-FJSM-B20-BD 0 0.0000 B2-010-103-FJSM-B21-BD 0 0.0000 B2-010-103-FJSM-B22-BD 0 0.0000 B2-010-103-FJSM-E16-BD 0 0.0000 27

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Gross Activity Fraction of Measurement ID Adjusted Gross (dpm/100 cm2) OpDCGL B2-010-103-FJSM-E17-BD 0 0.0000 B2-010-103-FJSM-E18-BD 0 0.0000 B2-010-103-FJSM-E19-BD 0 0.0000 B2-010-103-FJSM-E20-BD 0 0.0000 B2-010-103-FJSM-E21-BD 0 0.0000 Table 7 Basic Statistical Properties of Systematic Measurement Population Adjusted Mean Mean Median Max Min Std. Dev. Gross Adjusted Dose BcDCGL Gross (mrem/

BcDCGL yr)

(dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

Fraction 113 0 1,199 0 249 19,751 0.0057 0.1426 The mean activity from systematic static measurements was divided by the Adjusted Gross Base Case DCGL to derive a mean fraction. The mean fraction was then multiplied by twenty-five (25) mrem/yr to derive the dose attributed to the survey unit. For survey unit B2-010-103, the calculated dose from residual activity is 0.1426 mrem/yr.

8. QUALITY CONTROL The implementation of survey specific QC measures included the collection of thirteen (13) replicate static measurements (B2-010-103-FQFO-A09-BD, B2-010-103-FQCM-B13-BD, B2-010-103-FQWB-C13-BD, B2-010-103-FQFO-D02-BD, B2-010-103-FQCM-E06-BD, B2-010-103-FQWO-F05-BD, B2-010-103-FQRO-G06-BD, B2-010-103-FQWO-H08-BD, B2-010-103-FQFO-A21-BD, B2-010-103-FQFC-D20-BD, B2-010-103-FQSM-B16-BD, B2-010-103-FQSM-E19-BD, and B2-010-103-FQSM-B21-BD) for QC analysis. The acceptance criterion for replicate static measurements is that the same conclusion is reached for each measurement. The acceptance criterion is satisfied if the replicate measurement is within 20% of the standard measurement. In cases where the replicate measurement is not within 20% of the standard measurement, but both measurements are below the Operational DCGL as well as the static MDC, there is an acceptable agreement. Seven (7) of the QC replicate measurements did not fall within the 20% criteria; however, the standard and replicate measurements for each were well below the Adjusted Gross Operational DCGL as well as the static MDC, and no further action was deemed necessary.

28

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103

9. INVESTIGATIONS AND RESULTS No investigations were performed during the performance or analyses of the survey.
10. REMEDIATION AND RESULTS No radiological remedial action as described by MARSSIM Section 5.4 was performed in this survey unit prior to or as a result of the FSS. Chapter 4 of the LTP determined that remediation beyond that required to meet the release criteria is unnecessary and that the remaining residual radioactivity in above grade buildings was ALARA.
11. CHANGES FROM THE FINAL STATUS SURVEY PLAN There were no addendums to the FSS plan.
12. DATA QUALITY ASSESSMENT (DQA)

The DQO sample design and data were reviewed in accordance with LC-FS-PR-008, Final Status Survey Data Assessment (Reference 12) for completeness and consistency.

Documentation was complete and legible. Scan surveys and the collection of static measurements were consistent with the DQOs and were sufficient to ensure that the survey unit was properly designated as Class 2. The survey design had adequate power as indicated by the Retrospective Power Curve (see Attachment 5).

The measurement results indicated that all measurements were less than 50% of the Adjusted Gross Operational DCGL.

Although MARSSIM states that the Sign test need not be performed in the instance that no measurements exceed the DCGL, the test was conducted to demonstrate coherence to the statistical principles of the DQO process. The Sign test was performed on the data and compared to the original assumptions of the DQOs. The evaluation of the Sign test results clearly demonstrates that the survey unit passes the unrestricted release criteria, thus, the null hypothesis is rejected. The results of the Sign test are presented in Attachment 3.

The preliminary data review consisted of calculating basic statistical quantities (e.g., mean, median, standard deviation). The mean and median values of the data were well below the Adjusted Gross Operational DCGL. Also, the retrospective power curve shows that a sufficient number of measurements were collected to achieve the desired power. Therefore, the survey unit meets the unrestricted release criteria with adequate power as required by the DQOs.

29

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 The survey unit data is presented graphically through a frequency plot and quantile plot. All graphical presentations are provided in Attachment 5.

13. ANOMALIES No anomalies were observed during the performance or analyses of the survey.
14. CONCLUSION Survey unit B2-010-103 has met the DQOs of the FSS plan. The ALARA criteria as specified in Chapter 4 of the LTP were achieved.

The sample data passed the Sign test. The null hypothesis was rejected. The Retrospective Power Curve showed that adequate power was achieved. The survey unit is properly classified as Class 2. Therefore, in accordance with the LTP, Section 5.11, the survey unit meets the release criteria.

The dose contribution from survey unit B2-010-103 is 0.1426 mrem/yr TEDE, based on the mean activity of measurements used for non-parametric statistical sampling.

Survey unit B2-010-103 is acceptable for unrestricted release.

15. REFERENCES
1. LC-FS-PR-009, Final Status Survey Data Reporting
2. La Crosse Boiling Water Reactor License Termination Plan
3. LC-FS-PR-015, Final Status Surveys for Structures
4. LC-FS-PR-002, Final Status Survey Package Development
5. NUREG-1575, Revision 1, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)
6. La Crosse Boiling Water Reactor Historical Site Assessment
7. GG-EO-313196-RS-RP-001, Characterization Survey Report for La Cross Boiler Water Reactor
8. RS-TD-313196-001, Radionuclides of Concern during LACBWR Decommissioning
9. NUREG-1757, Volume 2, Revision 1, Consolidated Decommissioning Guidance -

Characterization, Survey, and Determination of Radiological Criteria, Final Report

10. LC-FS-TSD-002, Operational Derived Concentration Guideline Levels for Final Status Survey
11. LC-QA-PN-001, Final Status Survey Quality Assurance Project Plan
12. LC-FS-PR-008, Final Status Survey Data Assessment
16. ATTACHMENTS 30

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Attachment 1 - Figures and Maps Attachment 2 - Scan Data Attachment 3 - Sign Test Attachment 4 - Quality Control Assessment Attachment 5 - Graphical Presentations Attachment 6 - Ludlum 2350-1 Download Reports 31

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 ATTACHMENT 1 FIGURES AND MAPS 32

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Exterior Systematic and Judgmental Measurement Locations Map 33

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Interior First Floor Systematic Measurement Locations Map 34

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Interior First Floor Ceiling Systematic Measurement Locations Map 35

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Interior First Floor Wall Systematic Measurement Locations Map 36

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Interior 2nd Floor Systematic and Judgmental Measurement Locations Map 37

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Interior 2nd Floor Ceiling Systematic and Judgmental Measurement Locations Map 38

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Survey Unit B2-010-103 Interior 2nd Floor Wall Systematic and Judgmental Measurement Locations Map 39

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 ATTACHMENT 2 SCAN DATA 40

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 16 Survey Unit B2-010-103 Complete Scan Data Highest Action Logged Scan Area Level Reading (cpm) (cpm)

A01 576 592 A02 550 592 A03 589 592 A04 735 820 A05 568 592 A06 587 592 A07 503 592 A08 573 592 A09 436 592 A09 QC 343 578 A10 813 820 A11 817 820 A12 546 592 A13 562 592 A14 533 592 A15J 505 592 A17 757 775 A18 560 775 A19 435 475 A20 436 475 B01 424 673 B02 330 673 B03 395 673 B04 314 673 B05 384 673 B06 497 673 B07 380 673 B08 545 668 B09 593 668 B10 620 668 B11 622 668 B12 556 668 41

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Logged Action Level Scan Area Reading (cpm) (cpm)

D03 395 497 D04 454 476 D05 469 476 D06 428 497 D07 475 497 D08 517 581 D09 525 581 D10 514 581 D11 478 497 D12 473 497 D13 491 497 D14 476 497 D15 480 497 D18 718 775 D19 639 775 DR01 476 635 DR01 QC 350 612 DR02 337 635 DR03 296 635 DR04 304 635 DR05 430 635 DR20 QC 326 542 E01 253 542 E02 327 542 E03 255 542 E04 262 542 E05 245 542 E06 238 537 E06 QC 426 507 42

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Action Logged Scan Area Level Reading (cpm) (cpm)

E07 255 537 E08 286 537 E09 286 537 E10 265 537 E11 275 537 E12 220 537 E13 224 537 E14 267 537 E15 297 537 F01 606 607 F02 526 607 F03 581 607 F04 575 607 F05 603 607 F05 QC 543 656 F06 586 607 F07 596 607 F08 586 607 F09 606 607 F10 568 571 F11 504 571 F12 476 628 F13 530 571 F14 546 571 F15 548 571 FH01 450 520 G01 411 564 G02 353 564 G03 434 564 G04 372 547 43

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Logged Action Level Scan Area Reading (cpm) (cpm)

G05 388 547 G06 404 547 G06 QC 546 629 G07 373 547 G08 376 547 G09 406 547 G10 349 547 G11 424 547 G12 423 547 G13 336 629 G14 353 629 G15 347 629 H01 542 564 H02 535 564 H03 505 564 H04 529 564 H05 480 564 H06 381 627 H07 394 627 H08 298 627 H08 QC 550 629 H09 358 627 H10 392 627 H11 367 627 H12 370 627 H13 414 627 H14 365 627 H15 425 627 44

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Highest Logged Action Level Scan Area Reading (cpm) (cpm)

SK07 458 520 SK08 450 520 VT01 448 520 VT01 QC 303 612 VT02 472 520 VT03 438 520 VT03 QC 304 572 VT04 459 520 VT05 462 520 VT06 458 520 VT07 470 520 VT08 484 520 VT09 491 520 VT10 473 520 VT11 513 520 VT12 379 520 VT13 405 520 VT22 QC 356 612 (2) Action Level for scanning was conservatively based on the average background plus 50% of the Operational DCGL converted to cpm using the detector efficiency.

45

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 ATTACHMENT 3 SIGN TEST 46

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 16 Survey Unit B2-010-103 Sign Test SOF

  1. 1-WS Sign (WS) 1 0.0000 1.0000 +1 2 0.0632 0.9368 +1 3 0.0000 1.0000 +1 4 0.0000 1.0000 +1 5 0.1429 0.8571 +1 6 0.0015 0.9985 +1 7 0.0000 1.0000 +1 8 0.0000 1.0000 +1 9 0.0120 0.9880 +1 10 0.0000 1.0000 +1 11 0.0000 1.0000 +1 12 0.0602 0.9398 +1 13 0.0632 0.9368 +1 14 0.0000 1.0000 +1 15 0.0000 1.0000 +1 16 0.0000 1.0000 +1 17 0.0000 1.0000 +1 18 0.0000 1.0000 +1 19 0.0466 0.9534 +1 20 0.0000 1.0000 +1 21 0.0000 1.0000 +1 22 0.0000 1.0000 +1 23 0.0000 1.0000 +1 24 0.0000 1.0000 +1 25 0.0000 1.0000 +1 26 0.0000 1.0000 +1 27 0.0000 1.0000 +1 28 0.0000 1.0000 +1 29 0.0000 1.0000 +1 30 0.0000 1.0000 +1 31 0.0000 1.0000 +1 32 0.0000 1.0000 +1 33 0.0000 1.0000 +1 34 0.0000 1.0000 +1 47

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 SOF

  1. 1-WS Sign (WS) 35 0.0000 1.0000 +1 36 0.0000 1.0000 +1 37 0.0000 1.0000 +1 38 0.0000 1.0000 +1 39 0.0000 1.0000 +1 40 0.0241 0.9759 +1 41 0.0000 1.0000 +1 42 0.0000 1.0000 +1 43 0.0000 1.0000 +1 44 0.0000 1.0000 +1 45 0.0000 1.0000 +1 46 0.0000 1.0000 +1 47 0.0000 1.0000 +1 48 0.0000 1.0000 +1 49 0.0000 1.0000 +1 50 0.0000 1.0000 +1 51 0.0000 1.0000 +1 52 0.0000 1.0000 +1 53 0.0000 1.0000 +1 54 0.0000 1.0000 +1 55 0.0336 0.9664 +1 56 0.0015 0.9985 +1 57 0.0131 0.9869 +1 58 0.0000 1.0000 +1 59 0.0160 0.9840 +1 60 0.0000 1.0000 +1 61 0.0000 1.0000 +1 62 0.0000 1.0000 +1 63 0.0000 1.0000 +1 64 0.0088 0.9912 +1 65 0.0554 0.9446 +1 66 0.0000 1.0000 +1 67 0.0263 0.9737 +1 68 0.0729 0.9271 +1 69 0.0000 1.0000 +1 70 0.0000 1.0000 +1 48

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 SOF

  1. 1-WS Sign (WS) 71 0.0000 1.0000 +1 72 0.0000 1.0000 +1 73 0.0000 1.0000 +1 74 0.0000 1.0000 +1 75 0.0000 1.0000 +1 76 0.0000 1.0000 +1 77 0.0000 1.0000 +1 78 0.0000 1.0000 +1 79 0.0000 1.0000 +1 80 0.0000 1.0000 +1 81 0.0890 0.9110 +1 82 0.0000 1.0000 +1 83 0.0642 0.9358 +1 84 0.0613 0.9387 +1 85 0.0000 1.0000 +1 86 0.1196 0.8804 +1 87 0.1838 0.8162 +1 88 0.1167 0.8833 +1 89 0.2086 0.7914 +1 90 0.1576 0.8424 +1 91 0.0000 1.0000 +1 92 0.0817 0.9183 +1 93 0.0000 1.0000 +1 94 0.1999 0.8001 +1 95 0.1196 0.8804 +1 96 0.3618 0.6382 +1 97 0.3793 0.6207 +1 98 0.3793 0.6207 +1 99 0.3428 0.6572 +1 100 0.0336 0.9664 +1 101 0.0219 0.9781 +1 102 0.0000 1.0000 +1 103 0.0875 0.9125 +1 104 0.0715 0.9285 +1 105 0.0642 0.9358 +1 106 0.1153 0.8847 +1 49

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 SOF

  1. 1-WS Sign (WS) 107 0.0000 1.0000 +1 108 0.0934 0.9066 +1 109 0.0000 1.0000 +1 110 0.0632 0.9368 +1 111 0.0000 1.0000 +1 112 0.0000 1.0000 +1 Number of positive differences (S+) 112 Critical Value 65 Survey Unit Meets The release criteria 50

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 ATTACHMENT 4 QUALITY CONTROL ASSESSMENT 51

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Table 16 Survey Unit B2-010-103 QC Assessment Activity Activity Standard -20% +20% Comparison Within 20%

(dpm/100cm2) (dpm/100cm2)

B2-010-103-FSFO-A09-BD 38 30 46 B2-010-103-FQFO-A09-BD 0 N B2-010-103-FSCM-B13-BD 0 0 0 B2-010-103-FQCM-B13-BD 0 Y B2-010-103-FSWB-C13-BD 0 0 0 B2-010-103-FQWB-C13-BD 373 N B2-010-103-FSFO-D02-BD 0 0 0 B2-010-103-FQFO-D02-BD 0 Y B2-010-103-FSCM-E06-BD 0 0 0 B2-010-103-FQCM-E06-BD 295 N B2-010-103-FSWO-F05-BD 0 0 0 B2-010-103-FQWO-F05-BD 0 Y B2-010-103-FSRO-G06-BD 378 302 454 B2-010-103-FQRO-G06-BD 0 N B2-010-103-FSWO-H08-BD 0 0 0 B2-010-103-FQWO-H08-BD 33 N B2-010-103-FJWB-C15-BD 0 0 0 B2-010-103-FQFO-A21-BD 0 Y B2-010-103-FJFO-D19-BD 224 179 269 B2-010-103-FQFC-D20-BD 5 N B2-010-103-FJSM-B16-BD 0 0 0 B2-010-103-FQSM-B16-BD 0 Y B2-010-103-FJSM-E19-BD 0 0 0 B2-010-103-FQSM-E19-BD 81 N B2-010-103-FJSM-B21-BD 0 0 0 B2-010-103-FQSM-B21-BD 0 Y Comments/Corrective Actions: The replicate measurement results are in acceptable The acceptance criteria for replicate static measurements is that the agreement. same conclusion is reached for each measurement. This is defined as the replicate measurement being within 20% of the standard measurement. In cases where the replicate measurement is not within 20% of the standard measurement, but both measurements are well below the Operational DCGL, there is an acceptable agreement.

52

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 ATTACHMENT 5 GRAPHICAL PRESENTATIONS 53

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Quantile Plot for Gross Activity 54

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Histogram for Gross Activity 55

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 Figure 16 Retrospective Power Curve 56

FSS RELEASE RECORD LACBWR ADMINISTRATION BUILDING SURVEY UNIT B2-010-103 ATTACHMENT 6 LUDLUM 2350-1 DOWNLOAD REPORTS

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