ML17118A025

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Final Status Survey Report Submittal - Clarifying Information
ML17118A025
Person / Time
Site: Rancho Seco
Issue date: 04/20/2017
From: Tallman D
Sacramento Municipal Utility District (SMUD)
To: Cruz Z
Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
DPG 17-085
Download: ML17118A025 (275)
v • d • e


Text

DPG 17-085 April 20, 2017 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No.: DPR-54 Final Status Survey Report SulJmittal - Clarifying Information Attention: Zahira Cruz The purpose of this letter is to submit clarifying information to the Final Status Survey Summary Report submitted previously for NRC review (SMUD letter DPG 17- 038, dated February 28, 2017).

In response to comments arising from our April 6, 2017 conference call, SMUD has provided additional descriptive text regarding the application of the ALARA evaluations performed in accordance with Section 4 of the NRC approved Rancho Seco License Termination Plan as well as detailed context associated with survey units that contain additional survey units within their boundaries. SMUD is confident this additional information will clearly demonstrate the relationships between the Class 1, Class 2, and Class 3 survey units evaluated during Final Site Status Survey performance and provide assurance the ALARA requirements of 10CFR20.1402 have been met.

Attachment 1; FSS Final Report Rev. 1, provides a summary of the assessment performed for the remainder of the Part 50 site. SMUD has reviewed the survey area results to ensure that the proposed action will have no adverse impact on the ability of the site, in aggregate, to meet 10 CFR Part 20, Subpart E "Radiological Criteria for License Termination." (

J, Attachment 2; contains the remove and replace page instructions for Final Status I Survey Reports not reissued in their entirety.

Attachment 3; contains replacement instructions for Final Status Survey Reports reissued in their entirety.

Following NRC approval of the FSS Final Report and several programmatic and licensing transitions currently being processed under separate docketing, SMUD will O)

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Printedon Rancho Seco Nuclear Generating Station 14440 Twin Cities Road Herald, CA 95638-9799 916.452.3211 Recycled Paper

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submit a License Amendment request that the Nuclear Regulatory Commission (NRC) terminate the Rancho Seco 10 CFR Part 50 License, Number DPR-54. The spent nuclear fuel and the Greater than Class C {GTCC) waste remain stored at the Rancho Seco Independent Spent Fuel Storage Installation (ISFSI), licensed under 10 CFR Part 72.

Members of your staff with questions requiring additional information or clarification may contact me at (916) 732-4893.

Sincerely, Dan Tallman Manager, Rancho Seco Assets BG/DT Attachments (3)

Cc: Jack Parrott (w/o attachment)

NRC, Region IV (w/o attachment)

RIC: 1F.099 (w/o attachment)

ATTACHMENT 1 RANCHO SECO.

FSS FINAL REPORT Final Status Survey Report Phase II- IOSB April 13, 2017 rev 1 1

FSS FINAL REPORT Final Status Survey Report 1.0 Overview As discussed in Section 1.4 of the Rancho Seco License Termination Plan (LTP), SMUD intends to release the Rancho Seco site for umestricted use in two phases, with the license being terminated after completion of the second phase. The first phase included the release of the majority of the site, including impacted and non-impacted areas, except for the Interim Onsite Storage Building (IOSB) and the area immediately surrounding it.

SMUD shipped all Class B & C radioactive waste once stored in the IOSB to a licensed disposal facility in 2014. In accordance with the LTP, after disposing of the Class B & C radioactive waste, SMUD completed the final status survey for the IOSB and the area immediately surrounding the IOSB and will submit a license amendment request to terminate the 10 CFR Part 50 license and release the remainder of the site for umestricted use. The spent nuclear fuel and the Greater than Class C (GTCC) waste are stored at the Rancho Seco Independent Spent Fuel Storage Installation (ISFSI), which is licensed under 10 CFR Part 72, independent of the 10 CFR Part 50 licensed site.

Section 1.4 of the LTP discusses the information to be provided to support release of land from the Rancho Seco 10 CFR Part 50 license. The information provided in this report includes a discussion of final status survey results for each survey unit completed.

The information contained in this submittal, will be sufficient for the NRC to conclude that, for the land and structures associated with the release, the terminal radiation survey and associated documentation demonstrates that the facility and site are suitable for release in accordance with the criteria for decommissioning in 10 CFR Part 20, Subpart E by meeting a site release criterion of25 millirem TEDE per year over background.

Once these lands and structures are released, no additional surveys or decontamination of these areas will be required unless the NRC determines that the criteria of 10 CFR Part 20, Subpart E were not met.

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2.0 Site Information and Physical Description 2.1 Physical Description of Land or Structures to be Released The land and structures to be released will be described in the application for license amendment and is unchanged by this submittal.

2.2 Survey Unit Information Included in this Submittal As discussed in section 1.0 above, this submittal provides detailed discussion on final status survey results for 35 survey units located within the IOSB and surrounding land to be released. Details are provided for each survey unit on survey methods, results, data analysis, and conclusions. In all cases, Rancho Seco is providing a complete package of information relating to each survey unit so that the NRC staff can verify that the License Termination Plan has been fully implemented for each survey unit and that the final status survey results support unrestricted release of the land from License DPR-54 in accordance with the proposed license amendment.

This submittal addresses FSS information for survey units associated with the IOSB and surrounding land. Table 1 provides a description of the survey units addressed in this submittal.

T a ble 1 Survey U lll'tD escr1p ' fion

  • Survev Unit Cfass .I GeneralDescription.ofSurvev Unit DAW Bay- The back bay of the IOSB. The F8300001 3 survey unit has a surface area of348 m2.

DAW Staging Bay - The center bay of the F8300002 3 IOSB. The survey unit has a surface area of225 m2.

DAW Staging Bay Class 1 - A small elevated F8300003 1 area located on the DAW Staging Bay floor.

The survey unit has an area of0.74 m2.

DAW Staging Bay Buffer Class 2 - A buffer to the class 1 survey unit area located on the DAW F8300004 2 Staging Bay floor. The survey unit has an area of2.22 m2.

Truck Bay - The entry bay of the IOSB where vehicles were loaded excluding the loading dock F8300005 3 and the buffer area around the loading dock. The survey unit has an area of379 m2.

Hot Cell Class 1 -A segregated area in the Truck F8300006 1 Bay designed to hold containers with high dose rate. The survev unit has an area of 8 m2.

Hot Cell Class 2- A buffer area around the class F8300006 2 1 survey unit. The survey unit has an area of7.6 m2.

Loading Dock Class I - The area at the end of F8300007 1 the truck bay used to load material onto vehicles.

The survey unit has an area of 7.5 m2.

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  • Srirv.¢vJJnW * * ,Class *GeneralDesc11ip~i()ll ofSurv~y Un.it ' ' '> :

Loading Dock Buffer Class 2 - An area F8300008 2 surrounding the class 1 survey unit at the loading dock. The survey unit has an area of 19.9 m2 .

Cell Deck - The area above the lids of the storage cells with the northern end open to the F8300009 3 Truck Bay. The size of the survey area is 460 mz.

Sumps - The upper and lower sump areas. While these were one survey unit, each sump was F8300010 3 surveyed as a standalone survey unit. The two sumps combined survey area is 79.6 m2 .

Hot Cell Embedded Pipe -The 4-foot-long run of drain pipe from the hot cell floor to the 90° F8300011 1 elbow connection. No size was determined for the embedded piping as the survey design was the same for all segments of pipes.

Embedded Piping -All runs of embedded piping leading to the sumps from the DAW, DAW Staging and Truck Bays. No size was F8300012 3 determined for the embedded piping as the survey design was the same for all segments of pipes.

Office - The area outside the RCA with the F8300013 3 training and control rooms and the mezzanine.

The size of the area is 370 m2 .

Outside Area - The asphalt and soil berm F8300014 3 surrounding the ISOB. The outside area is 5,853 mz.

Asphalt area Class 1 - Small area where F8300014 1 remediation occurred of an area less than DCGL.

The survey area is 0.37 m2

  • Asphalt Buffer Class 2 - area surrounding the F8300014 2 class 1 area. The survey area is 1.85 m2
  • Roof - The roof of the IOSB. The survey area F8300015 3 is 1,735 m2
  • Cell A-1-The storage cell A-1. The survey area F8300016 3 is 27.5 m2 .

Cell A-2-The storage cell A-2. The survey area F8300017 3 is 28.3 m2

  • Cell A The storage cell A-3. The survey F8300018 3 area is 27.5 m2
  • Cell B The storage cell B-1. The survey area F8300019 3 is 23.1 m2
  • Cell B The storage cell B-2. The survey area F8300020 3 is 23.7 m2 .

Cell B The storage cell B-3. The survey area F8300021 3 is 23.1 m2 .

Cell C The storage cell C-1. The survey area F8300022 3 is 23.1 m2

  • Cell C The storage cell C-2. The survey area F8300023 3 is 23.7 m2
  • Cell C-3 -The storage cell C-3. The survey area F8300024 3 is 23.1 m2 .

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s'urv~v* unit* .1,:C?'. c111s~:n:~*L . ,. GeneralDescription of S.iir:Vev Ullfrj:i:* ...* *);;:*}*:*

Cell D The storage cell D-1. The survey F8300025 3 area is 23 .1 m2.

Cell D-2 -The storage cell D-2. The survey F8300026 3 area is 23.7 m2.

Cell D-3 -The storage cell D-2. The survey F8300027 3 area is 23. l m2.

Cell E The storage cell E-1. The survey F8300028 3 area is 26.1 m2.

Cell E The storage cell E-2. The survey F8300029 3 area is 28.3 m2.

Cell E The storage cell E-3. The survey F8300030 3 area is 27.5 m2.

Exterior surface ofIOSB - The outside wall F8300031 3 surface of the IOSB. The survey area is 2,750 m2.

Cask Wash Down Area - The cask wash down F8300032 3 area is located in the Truck Bay separated by a berm. The survey area is 13.9 m2.

The locations of the structures listed in Table 1 above are shown in Figures 1-3.

3.0 Potential for Cross-Contamination from Subsequent Activities There were no other decommissioning activities occurring at the site during this survey effort. As each FSS was completed for the individual survey units, the area was posted as required in the LTP to preclude further entry into the area. Where possible, the entry doors were shut and locked or for the storage and hot cells, the lids were placed to preclude entry.

Additionally, the entry gate to the area surrounding the IOSB was posted to restrict access to only decommissioning survey crew personnel. Since the number of personnel having access to the IOSB was limited to the survey crew, the potential for cross contamination was low.

4.0 Final Status Survey Report Rancho Seco LTP section 5.7.3 identifies the contents of the written reports of final status survey results that are to be submitted to the NRC. The contents include the items described in NUREG-1757, Vol. 2, Section 4.5. The survey unit design details and results are provided below in summary fashion. Specific survey unit design details and results are provided in a copy of each survey unit summary report in Attachment 1 of this submittal.

4.1 Overview of Results Only the IOSB and surrounding land is included in this report. The summary report for each survey unit contains a description of the survey unit; design information, including classification, size, number of measurements, map, scan coverage, and DCGL; survey results; survey unit investigations (anomalous data); data assessment results, including statistical evaluations, if applicable; changes in initial survey unit assumptions on extent of residual activity, and survey unit conclusions.

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Note that classification for the embedded piping does not affect the survey density (number of samples) as that is specified in the RSL TP as a measurement every six inches. As such, for the Hot Cell Pipe, the designation of the vertical section of pipe as a Class 1 was made to distinguish that section from the other sections as decontamination was performed on the Hot Cell pipe. No Class 2 buffer was established for this section of piping. The remainder of the embedded piping was designated as a Class 3 to denote the lack of detectable residual radioactivity.

Overall, the attached survey unit summary reports demonstrate that the survey units meet the criteria for release for umestricted use in accordance with the NRC approved Rancho Seco License Termination Plan.

4.2 Discussion of Changes to FSS Program The purpose of this section is to discuss changes to the FSS program. At the time of this submittal there have been no changes made to the FSS Program so there are no effects on the surveys.

4.3 Final Status Survey Methodology This section summarizes the implementation of the LTP Final Status Survey methodology for the survey units that are included in this report supporting the release of the IOSB and surrounding land. Table 2 is provided below that lists the key FSS design features for each survey unit. These design features include the survey unit classification and size, the standard deviation and Lower Boundary of the Gray Region (LBGR) used for determining the number of direct measurements taken, the percent scan coverage, the design DCGLEMC and the number of measurements required. The standard deviations listed were obtained from site characterization data or survey unit specific measurements. The Type 1 and 2 Errors are the default values of 0.05 and the LBGR is initially based on 50% of the DCGL.

Table 2, Survey Unit Design Parameters

,<: :*.. ' SU_-:.:

Survey *class -- Size - Standard D'esign, ___ Numberof- O/o.

Unit J]) - LBGR*

Deviation DCGLEMC Meas~~ements Scan

',,'.;/~ ', . . ,: (m2) ' *;*:,,' :. ,. , *>':f,'. "

F830001 3 348 1,055 21,500 NA 14 1 F830002 3 225 598 21,500 NA 14 1 F830003 1 0.74 598 21,500 640,700 5 100 F830004 2 2.22 598 21,500 NA 10 50 F830005 3 379 466 21,500 NA 14 1 F830006 1 8 740 21,500 141,900 14 100 F830006 2 7.6 740 21,500 NA 14 100 F830007 1 7.5 466 21,500 146,200 14 100 F830008 2 19.9 466 21,500 NA 14 50 F830009 3 460 275 21,500 NA 14 1 F830010 3 79.6 466 21,500 NA 14 1 6 revl

.su* * 'Standard*

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. Surv.ey

ufiitm *Clas~ i*siZe
  • Deviation LBGR

~;.  :"/Design .,

. .DQGLEMc Number Measurements*.

of

.. * :,014\ *~.

Scari

'{m2) i,. *. i :*. .'*

,v:/~. ,~,' . ' '

F830011 1 NA NA 50,000 NA Every 6 inches NA F830012 3 NA NA 50,000 NA Every 6 inches NA F830013 3 370 334 21,500 NA 14 1 F830014 1 0.37 513 21,500. 950,300 5 100 F830014 2 1.85 513 21,500 NA 10 50 F830014 3 5,853 513 21,500 NA 14 1 F830015 3 1,735 707 21,500 NA 14 1 F830016 3 27.5 303 21,500 NA 14 1 F830017 3 28.3 170 21,500 NA 14 1 F830018 3 27.5 175 21,500 NA 14 1 F830019 3 23.1 177 21,500 NA 14 1 F830020 3 23.7 183 21,500 NA 14 1 F830021 3 23.1 136 21,500 NA 14 1 F830022 3 23.l 198 21,500 NA 14 1 F830023 3 23.7 182 21,500 NA 14 1 F830024 3 23.l 365 21,500 NA 14 1 F830025 3 23.1 198 21,500 NA 14 1 F830026 3 23.7 174 21,500 NA 14 1 F830027 3 23.l 145 21,500 NA 14 1 F830028 3 26.1 197 21,500 NA 14 1 F830029 3 28.3 197 21,500 NA 14 1 F830030 3 27.5 182 21,500 NA 14 1 F830031 3 2,750 175 21,500 NA 14 1 F830032 3 13.9 466 21,500 NA 14 1 7 revl

- -----------~---------,---------------------------

4.4 Final Status Survey Results The methods used to determine the number of direct measurements to be taken is described in the LTP and the specific survey unit summary reports provided in . Key survey results are given in Table 3 below.

Table 3, Survey Unit FSS Result Summary 2,572 2,826 247 8 revl

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4.5 Survey Unit Conclusions Rancho Seco concludes that this information is sufficient for the NRC to make a determination equivalent to 10CFR50.82 (a)(ll) regarding the survey units contained in this submittal. The surveys for these survey units and associated documentation demonstrate that these areas of the facility and site are suitable for release in accordance with the criteria for decommissioning in 10CFR20, subpart Eby meeting a site release criteria of25 millirem TEDE per year over background for all dose pathways in accordance with the approved License Termination Plan.

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The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

5.0 References Rancho Seco License Termination Plan, rev. 2, submitted 10/2014.

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rAGING j ~IN TRm'A1 1

I _L_I?RY A-~YATED ir\JASTE BAY 1t d!; ;o:f1li Yi f'L., ~ IC'-;

Figure 1, Interior Survey Units 11 rev l

Figure 2 ' Outside Area S u rvey Units 12 rev l

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Figure 3, Roof Survey Area 13 rev l

ATTACHMENT 2 TIDEWATER INC A revision was made to each of the following Final Status Survey Reports (FSSR) in the ALARA Statement section. Please replace original page 4 of the FSSR with the current revl of page 4 provided for the following FSSRs:

  • F8300013
  • F8300233
  • F8300093
  • F8300243
  • F8300153
  • F8300253
  • F8300163
  • F8300263
  • F8300173
  • F8300273
  • F8300183
  • F8300283
  • F8300193
  • F8300293
  • F8300203
  • F8300303
  • F8300213
  • F8300313
  • F8300223
  • F8300323

FINAL STATUS SURVEYF8300013 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.

Table 4, Data Assessment Results Number of Samples: ** .

  • 15.

Median: 2,062 Mean:

  • 2,025
  • Static Data Standard Deviation: 325 Maximum:
  • 2,53~

. ;, ti . i'i:.z:L .Stan t~st Res!.l1t.S...*;,,:*; .~.j: ,;:\~iii::. ~ :*,~.;::.:;~,,;;;;;s:,s~\~;i,g!l)J].ent$. <:;ihi. * ~~4:1:!1~:

Adjusted N Value: 14

  • S+ Value: . 15 Critical Value: 1O Sufficient samples collected: Pass Maximum value <DCGLw: Pass**

Median value <DCGLw: >Pass Mean value <DCGLw: Pass*

Maximum value <DCGLemc: N/A Siqn test results: Pass The survey unit passes all conditions: I Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However this did not affect the relative shift 4 FSS DAWBAYrevl F8300013

FINAL STATUS SURVEY F8300093 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Samples:

Median: 1,955 Mean: 1,980 Static Data Standard Deviation: 2.42 Maximum: 2,348 i'..*, .. *. *:,:;~:1't:L.1Sign:te.s~iResliff~{~~~'~'~*, *.1 .S ;*i****** ..* .* **.*..1.~,~:'~:0mmenls.' ,:;r',;., *...

  • Adjusted N Value: 14 S+ Value: 15 Critical Value: fo.

t~~'~z, ....... , . 1<*.* oi:Ii~ti~~$~'ti~!~ct1~ri'E~:i~11~*'*),j7*.:.*:~:~~~ ~.\'.:~~* .:~'l'1~~~Wmme6t$* <.;3~,~1 ">::* ,,

Sufficient samples collected: Pass Maximum value <DCGLw: Pass ..

Median value <DCGLw:  ; Pass Mean value <DCGLw: Pass Maximum value <DCGLemc:

  • N/A Sign test results: Pass The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, based upon the adjustment of the relative shift, the calculated number of samples did not change. No potential areas of elevated activity were detected.

4 FSS Cell Deck revl F8300093

FINAL STATUS SURVEY F8300153 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Sam les: . 15 Median: 1,326 Mean: 1,552 Static Data Standard Deviation: 425 Maximum: 2,341 ii Test Results * **

Ad"usted N Value: 14 S+ Value:

Critical Value:

Sufficient sam les collected: Pass Maximum value <DCGLw: **. P~ss Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: ** N/A Si n test results: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was higher than the characterization data used for survey design. However the relative shift exceeded 3 and had to be adjusted. No potential areas of elevated activity were detected.

4 FSS IOSB Roofrevl F8300153

FINAL STATUS SURVEY F8300163 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.

Table 4, Data Assessment Results NumberofSamples: * .*. 15**

Median:

  • 1,868 Mean: 1,850
  • Static Data Standard Deviation: 145 Maximum: 2,047

.* :*:i*:.. :* ** *** ',;:,:.*.: ..'0;s1dfi;t~$l.~R.'esu1i$1!1tt~:r; i ... . . .. **.*.'.;l\Zi*,: **** *...,g*\. *.,:* .*\;~ ..bomm~'nt~1~;,L*:r*1 *. ,:s*~:

Adjusted N Value: 14 S+ Value: 15 .

Critical Value: 10

  • ~,*:~~*)'t1~::: . '.W~*1il~~~;1&ria~$ati$f~<:tion ""!;.~ 1.* , ***.*~I" ~~. > *~'.~*:.1i.; , com1Xt'int~.:. * *. ;>1*~\::.':'~.

Sufficient samples collected: *Pass**

Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc:

  • N/A SiQn test results: Pass
~.(.':.;~~p;cx:c ,:* *,** Fin~ltiS~atQ$1 ** *<: ; '"'"""'~ ;' K*~*t*'*;* .:.,",. ' ,* 'chmll~llt$:: ' ; '. ...~;:.t~

The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell A-1 revl F8300163

FINAL STATUS SURVEY F8300173 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

    • ,<.;.;,,;. \.' * *:~Stcdi~J)ata valia¢}:i * *~** ' * * * "w ;~::1S, * ... < **  :.c'Ornm~ilts t*~c. . ""
  • Number of Samples:
  • 15 Median: . 2,023 .

Mean: 2,010 Static Data Standard Deviation: .165 Maximum: 2,349 Adjusted N Value: 14 S+ Value: 15 Critical Value: *.*. ****.* 10

~t . . '. '/~~~! <; *** **ctit~till'S~li~fa(#i on :;~r::r;!s'ij.\'. .. ~~~~I:~~1::~~*Tu;~'Corom~nt$~il~\ .... *.* ,;: i;;**< *.:

Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: N/A

  • Siqn test results: .*Pass
  • '.*~;*.** ... ,...., .~.;~&\V~~i#inal:St"tlls . . *.** ... ~:0;,n" *'. **.* }*' * < 1 * ..... c(>[fllfiint$l;:, }t***;*** *'* .**

The survey unit passes all conditions:

  • Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 PSS Storage Cell A-2 revl F8300173

FINAL STATUS SURVEY F8300183 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Sam Mean:

Static Data Standard Deviation:

Maximum:

Ad*usted N Value:

S+ Value:

Critical Value:

Sufficient sam les collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: *

  • Pas!)

NIA Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design which would result in a larger relative shift value. Since both values are in excess of 3 the difference in the variability does not affect the power of the survey. No potential areas of elevated activity were detected.

4 FSS Storage Cell A-3 revl F8300183

FINAL STATUS SURVEY F8300193 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

,s
c" ",;,7vJi 1~ 1*'. .. 'st~tie.b~t~:v~tuesn; . ~}{;;~~i',.:.* * .* .* .*"* * ,, :.: ~"~~t~~CQrtimints**:: ..;;;;;:f~ *. ,. :. .

Number of Samples:

  • JS.

Median: .* 1,868 Mean: 1,842 **

Static Data Standard Deviation: ' '123 .

Maximum: 2,078 *

~iz*{ ,:. * * ,*:~:*7:~~!!fn*ilat~R.e:su1t~;~.;il1i~\{;~~;it~J:J:;~: *. * *.*. :~.:;~, ;.."coiPfoerii$:c\ ;;~*~* : <.~:::i;*~:;

Adjusted N Value: '14 S+ Value: 15 Critical Value: * * * >10 *

    • * .:;t<: * : **;,;'!t'titeri(l~§atiS;f~~~jo11 * * * * *~' :. .;:.n;'".: i~~> ~.'. *
  • coiPment$t;~:> * .~%~~*

Sufficient samples collected: Pass Maximum value <DCGLw: Pass .

Median value <DCGLw: ..

  • Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: N/A Siqn test results: Pass*

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell B-1 revl F8300193

FINAL STATUS SURVEY F8300203 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

  • +::.:;;.;; .~ *.::1t:sia~)~!l~1a:.vaiui$~.~:'.~~.:\l**\:.:<<<:i";;~:i.z~1 .*.~*::*;' *** ,*'. ..::>cofilljj~)lf.$::~~\** :*t1,~*t" " '~ 1 Number of Samples: .* . *. 15 Median: 1,977 Mean: 2;013.

Static Data Standard Deviation: .* .. 173.

Maximum: .2,333

"('t~~~~;t'.i~~~*~~~~:t'<:;~1Sltiil' T~si'.Re$illt~<: i~1~ . '. :;~~;: ., .w.* .*:' ~:: .'. \ ::~. *~. F:,'.~'.;J *>:*0t~:~J .t0i;'}1!J Adjusted N Value: 14 S+ Value: 15 Critical Value: 1 * .10'

~* :;:f11ifi+/-~~~tfhif:erit~ria1Saui>1i'~IrQn:~~r.'. .. *~:~*.;~.: :: /"; \; *{' ;;;?*..;;.:* *. :.c()mm~ti~': .* ~:.t\*~~

  • i}~\fl~

1 Sufficient samples collected:

  • Pass Maximum value <DCGLw:
  • Pass Median value <DCGLw: '.Pass Mean value <DCGLw:
  • Pass Maximum value <DCGLemc: N/A SiQn test results:
  • Pass
  • The survey unit passes all conditions: ' Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell B-2 revl f 8300203

FINAL STATUS SURVEY F8300213 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Samples: 15 Median: 1,909 Mean:

  • 1,926.

Static Data Standard Deviation:

  • 124 Maximum: 2, 106 1
  • s~:::, ::siarf~t'~~f.,Re~ults~\;~&:,~u* . . : -.;;:' '**~iik"'~~~lf~~*~~'¢()mfuents '1"'~;; <<:"'.,'iii Adjusted N Value: 14 S+ Value: 15 Critical Value: .*. 10
  • "t  ;*~~,l~~:i~ triteti~~~ati~ta/!i1'.()ri.;:;: ~
  • s.. *~.r ;.;:, \\ii~~~11~~;, ::c<<;>mJfi~nts* .* *1;~£L** '.':*

Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass .

Maximum value <DCGLemc: N/A Siqn test results: Pass

,:';.;*t~¢,;'*...,. J:/' .: ?:1~~fib~1.statP~:<: * . . :.,*"'.* . . ::: ~ r*J:'1 *\~;\l;,**~+~~,;~!,cP.mment$: ;§t.:;,*.* \\;;;:~*

1 The survey unit passes all conditions: I Pass*

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design which would result in a larger relative shift value. Since both values are in excess of 3 the difference in the variability does not affect the power of the survey. No potential areas of elevated activity were detected.

4 FSS Storage Cell B-3 revl F8300213

FINAL STATUS SURVEY F8300223 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results ll1t/. ' 11'. 1':'"~~, ... * *st~ti~'l>ita vaa~~s:i:h~B\11!\:;;;~~ . . ** *,' ;." ,., :;'~,~~£,c:;oiffm~nts;:l~t:. ':;x::1\;*:*

Number of Samples: 15 Median: 1,891 Mean: 1,869 Static Data Standard Deviation: ' 124.

Maximum: 2,078 *

  • ~~*J:.1~:;:.*:;,z(1;.~;*,~: .*$la'~!t~$t' Results~*,:?;;,,~~~~;;,",:: .**,r ~::,~;'.~ .* *Commen't$'**** . . : .*~~~\'~t~:f~'***;

Adjusted N Value: 14 S+ Value:

  • 15 Critical Value: 10

. .*.,, . .* * ':*:"~0::~~~.;:c;riteriiRii:tisfa~tlqnil1:1t~~i::. . , '..> :.,*'. :;' i::~:QJ>mmeij\~;;.'.:i,,., ::::1'"'i/'.. .*1 1 1 Sufficient samples collected: . Pass' Maximum value <DCGLw: Pass Median value <DCGLw: Pass.*

Mean value <DCGLw: .Pass Maximum value <DCGLemc: N/A Sign test results: Pass The survev unit passes all conditions: .Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was lower than the characterization data used for survey design. No potent!al areas of elevated activity were detected.

4 FSS Storage Cell C-1 revl F8300223

FINAL STATUS SURVEY F8300233 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Samples: 15 Median: .1 ;899 Mean: 2,011 .

Static Data Standard Deviation: 383

  • Maximum: 3,318 Adjusted N Value: 14.

S+ Value: 15.

Critical Value: * **. . 10 .

i~ * **w**~** **.. '<t.rit~tia'Satisfacti9~~-\s.sx; *~ .*

  • 1.1 ** *t;. :*~-~*_¢c)l:ridt~nts~~\~.::'.. :\.~~,~~~;;1; Sufficient samples collected: *. Pass Maximum value <DCGLw: .* Pass**

Median value <DCGLw: . Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: *

  • NIA*

Siqn test results: Pass The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell C-2 revl F8300233

FINAL STATUS SURVEY F8300243 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

. <TY v~~.*>* .* < : :$~Ji~ Dl1aV~l ...~f~~:;<' :*;*:j,\ .* *: ';> >'..* .*** *' :~*:;P,;t;,;;~~l§Qroni'E!ot$~ . * ...* '""*

Number of Samples:

  • 15
  • Median: 2;023
  • Mean: 2,045 Static Data Standard Deviation:
  • 127 Maximum: 2,288 Adjusted N Value: 14
  • S+ Value: 15 Critical Value:

Sufficient samples collected: Pass Maximum value <DCGLw:  ::Pass Median value <DCGLw:

.Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: N/A Siqn test results: Pass The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 PSS Storage Cell C-3 revl F8300243

FINAL STATUS SURVEY F8300253 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

    • ~;p~ t:l '"' ~:statl~XQafa:\lalUf.iJi{::\~;: ..* : * .~' :::*:::< ,;:;:.::;.::\"Y~*;~1~~~1~~i>mmenjif. . . ~.\

Number of Samples: 15 Median: *1,922 Mean: 1,956 Static Data Standard Deviation: 186 Maximum: 2,295

..*~\. ::*:t;': $igni:'Te$JRe~*un$\;~;:t J ..;*;; .......... *>*.~1:i*\;::: . :Q<>m1n~~t$.:;;;<:;:;.*.*: * **

Adjusted N Value: *** H S+ Value: 15*

Critical Value: 10

  • * ,~ui;;'.(; * .....~*.... Crit~r.*~ satisfaction' :~.;*.;:z*; '.:{:1~,i:: .. ,* *>;~)~~:{:~;'.~A~* tC°Qlnm~.nts~i~;1,,l:<?~~:";

Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: *.. Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: .. N/A Sign test results: Pass t~:'; i..:~:::~~.*. *. :~.* Final:Sl:atus1'~~-~1}::. ;lE:* ***~~~ ~~ ;~~~.z:L+~:;:;\ &i\\~f1 Le~mn:i~nt~1~i~::*~\~ ....

  • s:1 2 0 The survev unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the D~GL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell D-1 revl f 8300253

FINAL STATUS SURVEY F8300263 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

,!;'\;:, '. :* , ** ;:$tatiP:'b~taValues i*t1:;0~~*'{~,;;'.; .1:, :,  ! " ,
  • ComJil~lits i ;;;~~.. <t:

Number of Samples: .,1!:i Median: 2,038 Mean: 2,012 Static Data Standard Deviation: .135 ***

Maximum: 2,250.

i ~,N {, :! *.*, ! n*Test Re~~ns * . . ~'.~~t~~l::ifv1* <<;~}~ ~'.;;'.;1¥'1~;~'s;*:~~\<1'~}f:Comrnerft~~f,~1~~\ {7~;~*.,~ ~*,

Adjusted N Value: 14 S+ Value: 15 Critical Value:

Sufficient samples collected: Pass

  • Maximum value <DCGLw:

Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: . NIA Siqn test results:

  • Pass

.:*~*~£1!2'.; *< .::.*r 'l=inal.$tat<<s ...;+: * . iv' * *  ! * .. *:J **,~~'.~!1\C9mme.'1t§!.:" <2i~!:>:r ,\*,;;

The survey unit passes all conditions: *Pass:

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 PSS Storage Cell D-2 revl f 8300263

FINAL STATUS SURVEY F8300273 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Samples: 15 Median: 1,985 Mean: 2,008 Static Data Standard Deviation: ... 161 Maximum: 2,333 Adjusted N Value: 14 S+ Value: 15 Critical Value: * . 10

{,.'\~.*- *;: : .cr1teria'.$ai1~tiitf~r\.iv.
  • Lir. **..** ~\. :; 1~:1'.it'l~"i~~s~~~~f~l>mm~nts .* .*+/-1:~.. *.. * *~.*1t*

1 Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass*

Mean value <DCGLw: Pass Maximum value <DCGLemc: WA Sign test results:

  • Pass
          • .. ***;,.:****~*: .. ;~;. *.* Final'statii~~~~~*j;.t~.,.,.> '.'.:.'.*.\~~~~~~;~:\t£,~.\ :i:1:;.;;,*;:.~Coml1:iiintl> *.. : .* ;. *. *:~****

The survey unit passes all conditions: Pass.

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, none of the survey results exceeded 10% of the DCGL. No potential areas of elevated activity were detected.

4 FSS Storage Cell D-3 revl F8300273

FINAL STATUS SURVEY F8300283 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

" .* /,~;l~tatic Pata)/~lue~( *.** ;'i '. *..**g~\~:~:~** I;\': ,:.>*:** . *qomm.el:l~$~~~.:;~:*~t: . ::..~* <'

Number of Samples: 15 Median: 1,938 Mean: 1,901 Static Data Standard Deviation: . 170*

Maximum: 2,154

,~ * 'h ..* * *** * * *
~; * :"'.Sigtt*~~st:R~~ijl\$l~*:~~~* 1i~:;;.~: t~0 . * * ~\~:~:~;~~~i::v~;~~omment~ !:©JI~~.: *** :'if+~**

Adjusted N Value: 14 S+ Value: 15 Critical Value: *10 .*

~*~;7*~*~.'~~~~'f'~~s*w;:~ Cr'iteti~~~~dsf~~tiC>li~:*:~H~~;~I. **.  : J;,:;*.~ ,**: *;:,,\;*~:*1¢f>ro6lefo~':1 :~ ~~:~t; . . .* . s Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw:

  • P~ss Maximum value <DCGLemc: N/A Siqn test results: Pass

" * .. *'~:* : **;;*;,<:tt .;.,t:in1:1**siatu~r .* . *">t:Y'f *: * * *** <;.* ,~ 11::~;1 ; . ** *:;;.~~comments .\~J: *.g**:* . , ":'.*'

The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell E-1 revl F8300283

FINAL STATUS SURVEY F8300293 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

~¥1~~r:~t;~t:~: ..:<(':".*s1atlp*:~~f~*.v-~1\i~ss:~l:ii* . . . ;:,~,:*il2~s'i:01 ;~1ili:J~~!~£~~1*teoiliili~nts1~:;r :**;:\i~ji.'~*:':si.

Number of Samples: 15 Median:

  • 2,083
  • Mean: 2;035 Static Data Standard Deviation: <H 80 Maximum: 2,326
  • : **s.s ..* '"****.o:.;:;~*tesl:Re.slim~~:* . *:**, . .:~'. *~;:~,. 1 ' ** ** **cC:>ffillent$'~~i~*:~r *. * ..,*

Adjusted N Value: *. >:14' S+ Value: 15 Critical Value: . 10.

t\~Sj;t.1. ,* * * .. ~:::~~rit~~~1satJs1a~fio:n~\~~1~;:1*;*l~~i~i1 1:2*:9 * {':ti~1 * *;* <Comili~rits:~j~~~*;.**:::*<t**~'"

Sufficient samples collected: .**.Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: .Pass Maximum value <DCGLemc: N/A Siqn test results: pass

~;;;:>*"'~"' .* . * *. *:~~:~~~:*) i=lt)"ij~$Th'ftli\~~~;;; '.;+~;!s"f\~;~i~~*~.1 * ..<f ~**:cl~; ?i~~~7;~;~.~lrrin'f~nt$:~":~1~1~~.:\ :>.;~~;;;

The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell E-2 revl F8300293

FINAL STATUS SURVEY F8300303 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results

!i'f~\1::~1~1;1* . ,:; staticbataValye$ ) ',, ' \;.( * ~\.;';\!~;tx.~~;'.~comments "
  • i~~~:: .*;

Number of Samoles: 15 Mean: 2;088 Static Data Standard Deviation: /+18 Maximum: 2,409

    • . .~.*~{;;1,, , "'t***si'no.I~st'Re~mt$ *
  • 1~.t: . ***'
  • P'!*~:'~":i~t:::*~:,,x~'C3.9mment$~;~i~t*~'~'~ **1,~11;,
  • Adjusted N Value: ** 14 S+ Value:
  • 15.

Critical Value: ' 10

  • *;***~.;. ; .:.... ~:'.1'!0PriteriJ~,;satisfacti6r1**~*. *'..:**i\ '*z\ ..* * ,*: ~'. .:.*  :.
  • ~*ir:,:*~**eomm~nt~(*: ~ x.

Sufficient samoles collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: . NIA Sign test results: Pass The survey unit passes all conditions: . Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS Storage Cell E-3 revl f 8300303

FINAL STATUS SURVEY F8300313 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Median: 2;078 Mean: *. 2, 104 Static Data Standard Deviation:

  • 175 Maximum: 2,380 .
> ~. : *i<. :,'u'.FI~= .. n TestResul~ << ; <;r~,; ';: : .(*1?~\;'.1;;c6tl}Q)~nts;:~:;;; *:. :{

Adjusted N Value: 14 S+ Value: 15 Critical Value: ** *

  • 10
  • Sufficient samples collected: Pass Maximum value <DCGLw: *.Pass Median value <DCGLw: . *Pass Maximum value <DCGLemc:
  • NIA Siqn test results: Pass The survey unit passes all conditions: Pass .

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 3 survey based on the scoping evaluation. The required number of direct measurements was made and the scan 4 FSS Exterior Surfaces revl F8300313

FINAL STATUS SURVEY F8300323 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results 1

  • ** ** ~,;~;,~tatlfl}::t>atava1ues**.::;,;:*...*:;::S*u~:;r:*.:*":';~.
  • cifmroen~t ,.**," . :. :*;,.:,~.2 Number of Samples: .15 Median: 2,174 Mean: 2,197 Static Data Standard Deviation: . 237 Maximum: 2,644

~'.';' *. '. :;.;{::$i9o~t~1lR~S:iUi$::'.t.:,~;,~1fa;.* .;:~:*> *.::*;:< ':'"'~,r:::;; :,¢~mri"aeut~t::s. 1~;.,.1~:~,,  : .:

Adiusted N Value:

  • 14 S+ Value: 15 Critical Value: I* ..
  • 10 Sufficient samples collected: Pass Maximum value <DCGLw: Pass
  • Median value <DCGLw:
  • Pass Mean value <DCGLw:
  • Pass Maximum value <DCGLemc: NA SiQn test results: Pass

>...':>t 0:' /T:~.*.;~:'

  • fin~l~st~tYl~;:k: .. .... . :~\l:J".111'11*"':\> ** < >1~,*.. ~~mment§?1, :>, *'.  :*.,

The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS ofthis survey unit was properly designed as a Class 3 survey based on the results of the scoping survey. The required number of direct measurements was made and 4 FSS Cask Wash Down revl F8300323

TIDEWATER INC A revision was made to each of the following Final Status Survey Reports (FSSR) in the ALA RA Statement section. Please replace original page 5 of the FSSR with the revl of page 5 provided for the following FSSR:

  • F8300133

FINAL STATUS SURVEYF8300133 ALARA Statement:

The residual activity with!n the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The PSS of this survey unit was properly designed as a Class 3 survey based on the results of the investigation survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit P8300133 meets the release criteria of 10CPR20.1402.

5 PSS Office Area revl P8300133

ATTACHMENT 3 I TIDEWATER INC A revision was made to each of the following Final Status Sur\tey Reports (FSSR) in the Survey Unit Description, Site Characterization section and ALARA Statement. Please replace the original FSSRs listed below with the rev 1 FSSR provided in its entirety for the following FSSRs:

  • F8300023
  • F8300031
  • F8300042
  • F8300053
  • F8300061
  • F8300062
  • F8300071
  • F8300082
  • F8300103*
  • F8300111
  • F8300123
  • F8300141
  • F8300142
  • F8300143
  • Minor editorial, non-technical corrections to survey unit name/identification on cover page and/or multiple pages of header and/or footer were made. Please replace the original FSSR in its entirety with the revl FSSR.
    • ~

Rancho Seco Final Status Survey Summary Report December 28, 2016 IOSB DAW Staging Bay rev1 Survey Unit F8300023 c\ /-\l Prepared By: ___(___, _1H-~_l_J_,,_*._(_\./_. ___ Date:_4 -_1_3_-2_0_1_7 _

FSS Engineer Reviewed By:_~_* - Date: 4-13-2017 Lead FSS Engineer Approved By: _£iJ::> ~£--- Date: 4/,8'//1-Manager, R:OS:o Assets

FINAL STATUS SURVEY F8300023 Survey Unit:

F8300023, Interim Onsite Storage Building (IOSB) DAW Staging Bay Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the IOSB contained and possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Static measurements were made of the interior surfaces of the DAW Staging Bay to confirm the absence or presence of plant-derived radionuclides.

Static measurements showed a mean gross beta activity level of 2,637 dpm/100 cm2 and a maximum value of 4,505 dpm/100 cm2

  • The statistics of the DAW Staging bay results combines all lower walls, upper walls, floor, and ceiling data. Based upon the scanning results two elevated areas were identified on the floor.

One of the areas exceeded the DCGLw but not the DCGLEMC. This elevated measurement was acquired at a location on the staging bay floor adjacent to an expansion joint in the concrete. Investigatory measurements across the expansion joint revealed activity in excess of the DCGLw. It was apparent that contamination had penetrated the the joint and an accurate measurement could not be made due to surface geometry considerations. Remediation was required for this area and it was classified as IOSB Staging Bay Class 1 (F830003 l). The maximum static measurement documented for this expansion joint is 17,946 dpm/100 cm2 .

The Staging Bay Class 1 (F8300031) Survey Unit is the subject of a separate report.

The other elevated area of the staging bay did not exceed the DCGLw. In this area, only a fraction of the DCGLw was observed and therefore no remediation was required and it became a part of the IOSB Staging Bay Class 3 (F8300023) and is the subject of this report.

The IOSB Staging Bay Class 2 (F8300042) buffer was created around the Class 1 and is the subject of a separate report.

Survey Unit Design Information:

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were randomly determined and approximately 3% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

1 FSS DAW Staging revl F8300023

FINAL STATUS SURVEY F8300023 Table 1, Survey Unit Design Parameters Survey Package: F830 DAW Staging Bay Survey Unit: 002 Class 3 SU Area (m 2) 248 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor N/A Class 3 Design DCGLemc (dpm/100cm 2 ): N/A Class 3 DCGLemc: N/A Class 3 LBGR: 21,500 Default= 50% DCGL Sigma: 598 Scoping Survey Data Type I error: 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m 2 ) N/A Total Instrument Efficiency: 0.132 From 10/26/16 Survey Total Area Scanned (m 2 ): 5.55 Scan Coverage (%) 3% Class 3 Choosing 'N/A' sets material Material Type: N/A background to "O" 1~1*., .. **;);p.;;'.!Js;: :~~I* :;ca1cu1~tea~v~1\Jg$'.'~/ >W\}~* ~~.~~~'~.,;f.c.*, 1.':: * *'* ~;1;~\~C>mment$j: . ***. *"'~

Z1-a: 1*.645 Z1-B: . 1.645 Sign p: 0.99865.

Calculated Relative Shift: 35.9 Relative Shift Used: ** . ** .. 3:o

  • Uses 3.0 if Relative Shift >3 N-Value: *.* * .**. * **** 11 N-Value+20%: 14 2 FSS DAW Staging Bay revl F8300023

FINAL STATUS SURVEY F8300023 Survey Results:

A total of 15 direct measurements were made in F8300023. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

Table 2, Static Measurement Results

  • Number , Sample #.* ,,< ** I Beta (cprn) 1 F8300023C00001 215 1,629 2 F8300023C00002 274 2,076 3 F8300023C00003 263 1,992 4 F8300023C00004 229 1,735 5 F8300023C00005 294 2,279 6 F8300023C00006 261 1,977 7 F8300023C00007 264 2,000 8 F8300023C00008 234 1,773 9 F8300023C00009 382 2,961 10 F8300023C00010 243 1,884 11 F8300023C00011 276 2,091 12 F8300023C00012 310 2,348 13 F8300023C00013 275 2,083 14 F8300023C00014 284 2,152 15 F8300023C00015 233 Table 3 contains the statistical summary of the static measurement data for the DAW Staging Bay.

Table 3, Beta Summary Statistics Beta Static DAW Staging Bay Mean 2,050 Median 2,000 Standard Deviation 323 Minimum 1,629 Maximum 2,961 Count 15 3 FSS DAW Staging Bay revl F8300023

FINAL STATUS SURVEY F8300023 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL.

Table 4, Data Assessment Results Number of Sam Median: 2,000 Mean: 2,050 Static Data Standard Deviation: 323 Maximum: 2,961 Median value <DCGLw:

Mean value <DCGLw:

Maximum value <DCGLemc: N/A Si n test results:

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.

4 FSS DAW Staging Bay revl F8300023

FINAL STATUS SURVEY F8300023

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 3 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300023 meets the release criteria of 10CFR20.1402.

5 FSS DAW Staging Bay revl F8300023

Attachment 1 Maps December 28, 2016 Survey Unit F8300023

N Staging Bay North e F8300023C00006 13 = 1 ,977 dpm/100 cm 2 I

F8300023C00011 e 13 = 2,091dpm/1 00 cm 2 Doc rto Fa300023C00004*

13= 1,735 dpm/100 cm 2 F8300023C0001 0 e Tru1 :I Bay F8300023C00001 Ci -

13 = 1,884 dpm/ 100 cm 2 13 = 1 ,629 dpm/1 00 cm 2 F8300023C00015 tB 13 = 1,765 dpm/100 cm 2 3taging Bay VVest F8300023C00009 13 = 2,961 dpm/ 100 cm e F8300023C00013 Stagmg Bay Fl I e Stag 1ng Bay East Staging Bay Ce.ling lOJ 13 = 2,083 dpm/1 00 cm 2 F8300042 F8300031 (i nner)

F8300023C00014 13=2,152 dpm/100 cm 2 t9 F8300023C00008 <t 13 = 1,773 dpm/100 cm 2 F8300023C00007 e F8300023C00005 e 13 = 2,000 dpm/1 00 cm 2 13 = 2 ,279 dpm/1 00 cm 2 F8300023C00003 81 13 = 1 ,992 dpm/1 00 cm 2 I Door to DAVI Bay

~

F8300023C00002 fD 1* SMUD I ~,~!?,!~~:!~::

STAGING BAY 13 = 2,076dpm/ 100 cm 2 r=-itract No.: 4 5900914 26 SMUD F8300023C00012 Loca tion: Rancho Seco e To1k:

Drawing No.:

Sc oo i ne Survev App!"Oved by.

Staging Bay South 13 = 2,348 dpm/100 cm 2 IOSB Scooine Survev

Description:

DAW HORlli WALL 10 Drawn Bv:

Qc'd:

r-au J Reese Approval dot e:

0 20 5cale In feet X>

"° Dote: U282016 Rev No.:

Page 1 Att. 1 Maps rev 1 f 8300023

Attachment 2 Instrumentation December 28, 2016 Survey Unit F8300023

Attachment 3 Investigation December 28, 2016 Survey Unit F8300023 (none required)

Att. 3 Investigation revl f 8300023

Table 2-1. Survey Unit Instrumentation

,Measurement *. * ***. .;.1\'.liriimtim Dete,ctab,le A,ctivftya

  • Detector l

I'* ...... '..Type

. ..~ *. rn. . .s. trum, en,,trry**'pe:*:.::** ..... ******* . . . " ... .... ' '" ' ...

    • E.fficienCies
  • Beta Static Ludlum Model Beta - 492 dpm/100 cm2 12.9% 317899/331973 Measurement 2350-1 2/10117 Ludlum Model 44-116 B Detector Beta Static Ludlum Model Beta - 559 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2110/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 73 dpm/100 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- Beta - 75 dpm/100 cm2 5/13/17 10-1 a Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl f 8300023

Static Measurement MDA L*.:EC::;;;;t;i::i*s:.~c;ttJ Survey Type PR331973 Detector Number vv¥*m*,=v-~vv~~*"'~'~'~~~N~¥;

"' 16911 Background count rate (cpm)

. *.*. 1 *~ Count Time (min)

o. fa9 I

.. * .,.,:-: . .' ~

Efficiency L...;~L ,; il0_9;i Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0*5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page2 Att. 2 Instrumentation revl f 8300023

Static Measurement MDA Variables

, ., ..~,!?t~j Survey Type PR331972 Detector Number

) ,',

... __;<*;:-.....,[2321..-.*:/

Background count rate (cpm)

' . *. 1 ; Count Time (min) 1'.i ro:1.32 I Efficiency L.~.:,_:JclpJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0*5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page 3 Att. 2 Instrumentation rev 1 f 8300023

Attachment 4 Data Assessment December 28, 2016 Survey Unit F8300023

Histogram for Beta Static Activity (dpm/100 cm2) DAW Staging Bay ctiviy Nl.lfberofValles ,

Minm.m 1,628.79 M""""" 2,961 .24 so 322.8' Skewnei1 1.57 KLrtotis iea el Moan 2.0<~68 e!Mod.> 2.00100 8NormolOJStrWion 0Leu8N OMcnBR 1

1732 11165 19SS 2132 I 2265 2532 Page 1 Att. 4 Data Assessment rev 1 F8300023

Q.Q Plot for Beta Static Activity (dpm/100 cm2) DAW Staging Bay

  • -** " *~

Moan* 2050 Sd* 322.8 Slooe* 312.B lnte.c:ept*2050 Cwelo6on. R

  • 0.925
  • sest nt.ne 2*00 2200 1800 1600
  • 1.5 *1.0 -0.5 QO QS 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Art. 4 Data Assessment revl F8300023

LC1 IX2 . tC.~ LC4 LC6 . LC5 oaw/Trmo of count St1mple Com.ments cJikliitito/ bkr.

tutc MOA

(,

.*t*

I:' 0.434

'. !O/ii)/16' Page 3 Att. 4 Data Assessment rev 1 F8300023

Rancho Seco Final Status Survey Summary Report January 5, 2017 IOSB DAW Staging Bay Class 1 rev1 Survey Unit F8300031 F S Engineer Reviewed By:_/~_ Date: 4-13-2017 Lead FSS Engineer Approved By: .* £ft> ¥""* Date:

Manager, Rancho Seco Assets

~lt9 {t7-

FINAL STATUS SURVEYF8300031 Survey Unit:

F8300031, Interim Onsite Storage Building (IOSB) DAW Staging Bay Class 1 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the IOSB contained and possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated. reactor components, contaminated plant components and other contaminated items.

Site Characterization: Static measurements were made of the interior surfaces of the DAW Staging Bay to confirm the absence or presence of plant-derived radionuclides. Static measurements showed a mean gross beta activity level of 2,637 dpm/100 cm2 and a maximum value of 4,505 dpm/100 cm2

  • The statistics of the DAW Staging bay results combines all lower walls, upper walls, floor, and ceiling data. Based upon the scanning results two elevated areas were identified on the floor.

One of the areas exceeded the DCGLw but not the DCGLEMC* This elevated measurement was acquired at a location on the staging bay floor adjacent to an expansion joint in the concrete.

Investigatory measurements across the expansion joint revealed activity in excess of the DCGLw. It was apparent that contamination had penetrated the the joint and an accurate measurement could not be made due to surface geometry considerations. Remediation was required for this area and it was classified as IOSB Staging Bay Class 1 (F8300031). The maximum static measurement documented for this expansionjoint is 17,946 dpm/100 cm2

  • IOSB Staging Bay Class 1 (F8300031) is the subject of this report.

The other elevated area did not exceed the DCGLw. In this area, only a fraction of the DCGLw was observed and therefore no remediation was required and it was incorporated into the IOSB Staging Bay Class 3 (F8300023) and is the subject of a separate report.

The IOSB Staging Bay Class 2 (F8300042) was created to buffer the IOSB Staging Bay Class 3 (F8300023) area and each is the subject of a separate report.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than 10 m2 or land areas less than 100 m2 . In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these smaller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than one square meter (0.74 m2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were based on professional judgement in accordance with the LTP and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

1 PSS DAW Staging Class 1 revl F8300031

FINAL STATUS SURVEYF8300031 Table 1, Survey Unit Design Parameters

,i,;;~L;.~' *Evah.latiohJoput \t~rn.~s << : * ** <* ;* :'.Z'i'!'*'J~'.'.~* '.\ . .comment~

  • ,', \);k<f~*~

',' ,:_.;;*;,~ \ *,"

)': ..

Survey Package: F830 DAW Staging Bay Class 1 Survey Unit: 03 Class 01 SU Area (m 2) 01 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor 15 DTBD-05-003 Design DCGLemc (dpm/100cm 2 ): 640,700 DCGLemc: 640,700 LBGR: 21,500 Default= 50% DCGL Siqma: 598 Scoping Survey Data Type I error: .* o.b5 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.132 From 10/26/16 Survey Total Area Scanned (m2): 0.74 Scan Coverage(%) 100%' Class 1 Choosing 'N/A' sets material Material Type: N/A background to "O" cij1<;µ,1ji1~cl vai*u~sl.~~:~,**,*:*~~L: . ,'.'.~\~:(~01i\\~i.~:;.:tc~mm~n1;;;*

\

.l~.;k' ..* ~;'. . '; .* ; ';f".':\ ...

Z1-a: 1.645 Z1-o: .. 1.645 Sign p: .0.99865 Calculated Relative Shift: . 35.9 Relative Shift Used: . 3~0 Uses 3.0 if Relative Shift >3

  • .*. Values selected based upon N-Value: : .

5 Judgement Values selected based upon N-Value+20%: I* 5 Judgement 2 FSS DAW Staging Bay Class 1 revl F8300031

FINAL STATUS SURVEYF8300031 Survey Results:

A total of 5 direct measurements were made in F830003 l. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

Table 2, Static Measurement Results

'Numlier F8300031C00001 288 2,233 2 F8300031C00002 304 2,357 3 F8300031C00003 305 2,364 4 F8300031C00004 282 2,186 5 F8300031C00005 509 3,946 Table 3 contains the statistical summary of the static measurement data for the DAW Staging Bay Class 1.

Table 3, Beta Summary Statistics Beta Static DAW Staging Bay Class 1 Mean 2,617 Median 2,357 Standard Deviation 747 Minimum 2,186 Maximum 3,946 Count 5 Survey Unit Data Assessment:

The survey design required 5 static measurements based upon the size of the survey unit (0.74 m2 ). Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw. The data collected from location F8300031 C00005 while less than 10% of the DCGLw was collected over a crevice. In order to evaluate the effect of the crevice on the resulting data, the guidance contained in Section 6.2 ofDTBD 06-006 was followed and a follow up evaluation was performed using a gamma sensitive sodium iodide detector (Ludlum model 44-10). The results of the investigation confirmed no levels of residual radioactivity in excess of the DCGL. Attachment 3 contains the results of the investigation.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS DAW Staging Bay Class 1 revl F8300031

FINAL STATUS SURVEYF8300031 Table 4, Data Assessment Results Number of Samples: 5 Median: 2;357.

Mean:

  • 2:617 Static Data Standard Deviation: 747 Maximum: 3,946 Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw:
  • P~~s Mean value <DCGLw:

Maximum value <DCGLemc:

  • Pass Pass SiQn test results: ** N/A The survev unit passes all conditions: Pass Survey Unit Investigations and Results:

An investigation was required for follow up to direct beta measurement F830003 l C00005 to evaluate response in relation to a crevice. The results are contained in Attachment 3.

ALARA Statement:

Residual radioactivity following remediation is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 1 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, no individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 1 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the L TP. All of the static measurements were less than the DCGL. Investigation, performed per Attachment 3 results were less than the DCGL.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300031 meets the release criteria of 10CFR20.1402.

4 FSS DAW Staging Bay Class 1 revl F830003 l

Attachment 1 Maps January 6, 2017 Survey Unit F8300031

F*83Q0023 Staging Bay CL3 F8300042 Staging Bay CL2 8300031 c 002

=2,357 d m/100 cm 2 SMUD ~ TIDEWATER*NC YG111u1t1 1sconsrs 1 ~ '""A&Uf SMUD Approved by.

ApproYOI dote:

Rev No.;

Page 1 Att. 1 Maps rev 1 F8300031

Attachment 2 Instrumentation January 5, 2017 Survey Unit F8300031

Table 2-1. Survey Unit Instrumentation

  • .* Mfuimtiril,l)etect~~le f'\:ctivity 3 * * * ** Detect6~: ., *  :'G~lib,~~!iO~(.,_~,
. . i'.Efficiencies 'DueDateb*****

Beta Static Ludlum Model Beta - 454 dpm/100 cm 2 12.9% 317899/331973 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 78 dpm/100 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- 5/13/17 10-1

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300031

Static Measurement MDA

[:~:~:~:*~~~t~J Survey Type PR331973 Detector Number

[7 --v7;:C"~*~y4~**1 Background count rate (cpm)

( . . . *.* ; 1 I Count Time (min)

F\>00'1Z'.~J Efficiency

~~:~.:L: 100] Area of Detector (cm 2)

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm2)

Static MDA dpm/100 cm2 Page 2 Att. 2 Instrumentation revl F8300031

Attachment 3 Investigation January 5, 2017 Survey Unit F8300031 Att. 3 Investigation rev 1 F8300031

Final Status Survey Data Investigation/Evaluation FSS Package No. X8300031 I Date: I 11-29-2016 Location/Description: F830003 l IOSB Stage Bay CLASS 1 post remediation Instrumentation Involved: (include serial numbers) NIA Data Investigation:

REASON: *.

During execution ofF8300031, an elevated static (BD- beta direct) measurement above a floor crevice in the IOSB Staging Bay CLASS I resulted at location F830003 I C00005.

These instructions will provide the data necessary to properly evaluate this elevated measurement location.

SURVEY INSTRUCTIONS: ,{

Using a calibrated 2350-1 and 44-10 (2"x2" sodium iodide) detector, obtain a one minute gamma direct (GD) measurement in the same location (F830003 l C00005) as the elevated beta direct measurement obtained in the execution of package F8300031.

Data Evaluation and Investigation Resolution:

1. Log the results of the GD measurement below along with instrument and detector serial number, calibration due date and the 2350-1 download file name.
2. Sign and date performance of the survey.

REFERENCE' Per soction 6.2 ~mTBD-06-006 ele'>ired measumnents will be bive~t~ 44-10 detecto*, II I I -z. °I 1 collnnated to a 20,000 cpm cntenon.

. . z:. J1

. . , i..,

INVESTIGATION LOCATION ID F830003C00005 RESULTS: q c. ..., 0 gross counts. '11~0 bkg counts. z. o 1"' 11 2 '1- 1 .3 3

  • oo download file name 11-/Zc; In..

2350-1 SIN 31189:?.. Detector S/N 208.8/t.. Cal due date ?u'* to / 17 ~ 11/-z9/1l..

PERFORivlED BY:

-~~ I If /zq I u. 'N/A I NIA Technician A Dale Technician B Date

)(Acceptable for use and inclusion Based on the above resolt~ ion, the survey data is in FSS Package determined t~:

. AA D Not Acceptable for use Prepared bv: CV'~ _?:.

'*;_..--- FSSE Date 11-29-2016 Reviewedt~ XllLv 1 LFSSRE Date 11-29-2016

\-...) \_./

DEC-045, Rev. 0 Page 1of1 Att. 3 Investigation revl F8300031

Attachment 4 Data Assessment January 5, 2017 Survey Unit F8300031

Histogram for Beta Static Activity (dpm/100 cm2) DAW Staging Bay Class 1 Mri'run 2.196.05 M-..,, 3,94~7' SD 7' 6.

Skewnes* 2.18 Kt.rt0tit 4.79

~M ean 2.617.05 l!!IM.a.n 2.356.59 8Nmma!Disbbution Oleu BN O MoreBft

_ _o_ _ _ _____o -*-- _ _o_____

~_!J**-~---**--- o _ __

2404 - 2916 2991 3167 3343 3519 3671 Page 1 Att. 4 Data Assessment revl F8300031

Q*Q Plot for Beta Static Activity (dpm/100 cm2) DAW Staging Bay Class 1 Ac*...

  • -* - N*S Mean*2617 Sd*7'6.8 Slooe*65l3 lnterce?*2617 Conelalion.R*0.7$2 3750
  • eest fitliie 3500 3250

.,~u>

<<( 300) 2750

  • 1.2 -0.9 -0.6 ~ M U Q6 1.2 Theoretlcal Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment revl F8300031

Smear_Data_Calculation_Sheet_101316 tosB Final Status Survey

~l~LO

.LC4 LC6 lCS (lCPM lldpm Pate/Time of Co~mt Sample Comments 1 F830 1 c 00001 SM Stage Bay Floor 48 -1 11/29)16 f109 2 I* f830.

  • 003 1 c 000,02 ~M Stage qay floor 48 -1 11129/16 1111 3 F8~0, 003 1 c 00003 SM St<me Bay floor 51 6 .. li/29/16' llU c SM

~:

003 1 00004. stage s~v Floor *

  • 38' -24 11/29/16 ' 1113' 063 1 c OOOoS SM Stage !iay:fitoor 4? -8 11/29/16 1115 30 003 1 c 00006* *$1'1 *$tageJl~y.F!iior >< .::><::::  !*_::>-<: J<.

30 003 1 c ()Oai:J7 'SM Stage nay.Floor .><_.* ~  ::::><.: : .-:::-=:<

stacc *>< ><

J~

003 1 c O(JQOB ~IVi llavrtoor  :::>< 1*

~

1. I ,<; 00009

~ "><

003 SM .Stage U\)y Floor 10 F830 .003 1 'C 00010 SM S'tQge llav:Ho'or .>< ><

c >< >< ~*

11 FS30 003 1 O()Oll' *s!Vi 5fage Bay'i'toor 12 FS3.0 003 1 .c 00012 SM* s:lagc ilay Floor >< -::::>-<:

~

13 f$30' 003 1 c OO(}i3 SM Stage llay:Floor *..>:<

14 FB.30 oo:t ,1 c 9f)Ol4 S,M Stage B~y Floo.r *. '>< .=>< -::::>< '

15 F830 003 1 ~c ()()OlS SM. S~age Bay'Flooi

'><' '~*

Comments ay sir.nature betow, thG rcqUire<l source check and bi:Kkg.rQunyd ch et were s.atisfoctofili ks perio-rmed piiot ,t-o use of the tnsthimt.0( l-dentifiud below.

Ludlum 2929 Benchtop Instrument I*{!

' cffiei-cncv bkg count 12929 S/N: 182597 rate time MDA llDIV/O!

(1. 0~364

/

143-10-1S/N;188736 cpm min dp.mpr.rare:a TcchASign/Oate IL, ?J,..o;J11-'l~lt.. 48.5 1 77.6

al Due Oate:5/13/2017 f3 0.434 Tecli BSim'l/Date I t'/J A --~****

Cj)ll1 min dpmptrore;i II Page 3 Att. 4 Data Assessment revl F8300031

Rancho Seco Final Status Survey Summary Report January 6, 2017 IOSB DAW Staging Bay Class 2 rev1 Survey Unit F8300042 4-13-2017 Prepared By=---==--A----1'----- Date: _ _ _ __

FSS Engineer Reviewed By: _ _ ~~ _ _ Date: 4 2 017 Lead FSS Engineer Approved By: ~ oate: 4(1crl11-Manager, Ran h: Seco Assets

FINAL STATUS SURVEY F8300042 Survey Unit:

F8300042, Interim Onsite Storage Building (IOSB) DAW Staging Bay Class 2 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the IOSB contained and possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Static measurements were made of the interior surfaces of the DAW Staging Bay to confirm the absence or presence of plant-derived radionuclides.

Static measurements showed a mean gross beta activity level of 2,637 dpm/100 cm2 and a maximum value of 4,505 dpm/100 cm2

  • The statistics of the DAW Staging bay results combines all lower walls, upper walls, floor, and ceiling data. Based upon the scanning results two elevated areas were identified on the floor.

One of the areas exceeded the DCGLw but not the DCGLEMC* This elevated measurement was acquired at a location on the staging bay floor adjacent to an expansion joint in the concrete. Investigatory measurements across the expansion joint revealed activity in excess of the DCGLw. It was apparent that contamination had penetrated the the joint and an accurate measurement could not be made due to surface geometry considerations.

Remediation was required for this area and it was classified as IOSB Staging Bay Class 1 (F8300031 ). The maximum static measurement documented for this expansion joint is 17,946 dpm/100cm2 . Staging Bay Class 1 (F8300031) is the subject ofa separate report.

The other elevated area did not exceed the DCGLw. In this area, only a fraction of the DCGLw was observed and therefore no remediation was required and it became a part of the IOSB Staging Bay Class 3 (F8300023) and is also the subject of a separate report.

The IOSB Staging Bay Class 2 (F8300042) buffer was created between the Class I and Class 3 areas and is the subject of this report.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than I 0 m2 or land areas less than I 00 m2

  • In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these smaller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than ten square meters (2.22 m2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were based on professional judgement in accordance with the LTP and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

I FSS DAW Staging Bay Class 2 rev I f 8300042

FINAL STATUS SURVEY F8300042 Table 1, Survey Unit Design Parameters Survey Packaqe: F830 DAW Staging Bay Class 2 Survev Unit: 004 Class 2 SU Area (m2) 2 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor N/A Desiqn DCGLemc (dpm/100cm 2 ): N/A DCGLemc: N/A LBGR: 21,500 Default= 50% DCGL Siqma: 598 Scopinq Survey Data Type I error: *

  • o.o5*

Tvoe II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.132 From 10/26/16 Survey Total Area Scanned (m 2): 2.22 Scan Coverage(%) 1

, 1bo% Class 2 Choosing 'N/A' sets material Material Type: N/A background to "O"

1. .

Z1-a: I<* 1..645.

Z1-a: 1.645 Siqn p: :0.99865 Calculated Relative Shift: 35:9 Relative Shift Used: 1 3.0 Uses 3.0 if Relative Shift >3 Values selected based upon N-Value: 10 Judqement

..* Values selected based upon N-Value+20%:

  • j 0 Judqement 2 FSS DAW Staging Bay Class 2 revl f 8300042

FINAL STATUS SURVEY F8300042 Survey Results:

A total of 10 direct measurements were made in F8300042. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

Table 2, Static Measurement Results

,,,,,)",'' .... :.. * i. ;; ;

..; ... , * )

<'/',**'

(c1~rit)'

, Nufl!IJ,er 'J: Sample:#,,*:*. ,.*.*** * '*
  • h ;;< Beta (cpm):* *'; *'Bet(l

,**.;***;,: .. .<.'. "* ..: ,;:, '. '/  ; ; ,'  ;.:'" ,, ;. '; ,> ' : " ' ' '... ,.. , .. , ..

1 F8300042C00001 300 2,326 2 F8300042 C00002 300 2,326 3 F8300042C00003 280 2,171 4 F8300042C00004 304 2,357 5 F8300042C00005 269 2,085 6 F8300042C00006 281 2,178 7 F8300042C00007 261 2,023 8 F8300042 C00008 296 2,295 9 F8300042C00009 287 2,225 10 F8300042C00010 294 2,279 Table 3 contains the statistical summary of the static measurement data for the DAW Staging Bay Class 2.

Table 3, Beta Summary Statistics Beta Static DAW Staging Bay Class 2 Mean 2,226 Median 2,252 Standard Deviation 111 Minimum 2,023 Maximum 2,357 Count 10 Survey Unit Data Assessment:

The survey design required 10 static measurements based upon the size of the survey unit (2.22 m2). Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw. The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS DAW Staging Bay Class 2 revl F8300042

FINAL STATUS SURVEYF8300042 Table 4, Data Assessment Results Number of Samples: *.. to Median: 2,252 Mean: 2,226

, Static Data Standard Deviation: . 111 .

Maximum: 2,~57.

Sufficient samples collected: .* Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: P;;is.s Siqn test results: **

  • N/A The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 2 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, no individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 2 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the L TP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300042 meets the release criteria of 10CFR20.l402.

4 FSS DAW Staging Bay Class 2 revl F8300042

Attachment 1 Maps January 6, 2017 Survey Unit F8300042 I

83000 3 s ging ay Ef) F8300042C00007 13 = 2,023 dpm/100 cm2 {+/-) F8300042C00005 13 = 2,085 dpm/100 cm2

{+/-) F83000 1C00010 13 = 2,27 dpm/1 00 cm 2 F8300042C00009 Ef) 13 =2,225 dpm/ 100 cm 2 +

Ef) F8 00042C00002 13 . 2,326 dpm/100 cm 2 Ef) F8300042C 004 13 =2,357 dpm 100 cm 2

(+/-} F830 042C00008 13 = 2, 95 dpm/100 cm 2

{+/-) F8300042C00001 SMUD . . TI DEWATER INC 13 =2,326 dpm/100 cm 2 Dl'llKCIS I ltWfllStl I NOCIU.N ~I STAGI N G B A Y C LASS 2 9 l SMUD Approval dote::

Dot*: 9196JfH7 Rev Ho.:

Page 1 Att. 1 Maps rev l F8300042

Attachment 2 Instrumentation January 6, 2017 Survey Unit F8300042

Table 2-1. Survey Unit Instrumentation

,.u . .3

  • I,>etecfori* :* '.! :i~uliebDra'tt~e~::
  • Efficfori'des' .

Beta Static Ludlum Model Beta - 424 dpm/100 cm2 12.9% 317899/331973 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 78 dpm/l 00 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- 5/13/17 10-1

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl f 8300042

Static Measurement MDA

~':.-:'"~'"'~*~~.,..,~~'.'":".":-.:'"":""']

L~~:*.,.'.;_~:'.'.fil.E?!cLr! Survey Type PR331973 Detector Number

-;;"."
  • ,~;'~:1431 Background count rate (cpm)

. .* .. . i Count Time (min)

.i ,0.129* Efficiency

'-~""'~~*--'-":.,,;;;_.~"'*' Area of Detector (cm 2

)

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

t'ff"'-"--"""~'" __ _,,_,,=-'"f Static MDA Le ":.'..,:4§~::'1 dpm/100 cm 2 Page2 Att. 2 Instrumentation rev 1 F8300042

Attachment 3 Investigation January 6, 2017 Survey Unit F8300042 (none required)

Att. 3 Investigation revl F8300042

Attachment 4 Data Assessment January 6, 2017 Survey Unit F8300042

l Histogram for Beta Static Activity (dpm/100 cm2) DAW Staging Bay Class 2  ;\~i"~= -

Minin..m 2,023.26 Maicirrun 2.356.59 SD 110.

Skewness -0.70 Kl.A'tosis -0.55 G'JM""' 2.22&36

(;'!Modon 2.251.9'

~Nounal OilbbAion Olen ens 0More8iw

--.L~ ___o_ __

noo n~ n~ 2200 Page 1 Att. 4 Data Assessment revl F8300042

ActWlp Q-Q Plot for Beta Static Activity (dpm/100 cm2) DAW Staging Bay Class 2 N *10 Mean*2226 23$0 Sd

  • 11n9 Slooe*lH.1 lntercept*2226 CoireWion.R
  • 0.967 2250 ***

2150 2100

  • 1.5 *1 .0 -0.S no 0.5 1.0 1.5 Th eoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 f 8300042

Smear_Oata_Calculatlon_Sf1eet_1on16 r 1 LCl F830 LC2 LC3 LC4 LC6 004 2 c 00001.

LCS SM Stage Bay Fir Buffr IOSB final StatusSurvey JlCPM 49 '

f}dpm 1

DateiTime of Count 11/29/16 1056 2 ;f830 004 2 c ', .001?0~ 'SM ,~,.~ -20 11/29/16 10.57 3 ,F830. 004 2 c 00003. *SM -8 '11/29/16 1058 f830 C' oodo4 ' " ' ' """'

stt1ge . 45 45 4 004, 2 S_fv'I -8 11/29/16 1100 5 F830. *004 2 c 'DOOO~ .SM Stage Bay

  • 42

-15 k; 11/29/J.6 1101 6 F~3b 004 '2* c OOOOP. Sl'."J Stage Bay Fl~Btjff( ' 43 -i3 .h/19/16' 1102 7 F.830( 0 004 :2** :C

ooabi SM ' :Stage nay Fir eUffr ' <ls .g 'h/29/16 '1io.1 s ~.830 ()04 2, c 'iit;oqs 'SM s~~g'! l)<iy~li !l111lr, _,. 43 -13 11/29!16 1105 ,,

9 .F8:SI) .004 .2 c pb009, sivi Stage nay Fir Buffr 51 6 <1112.9/16 '1106 10 F~~O' . .0:04 "

2  ; c 't)oa10. SM. Stage, lli!Y Fir Di.iffr I *: 34, >> -33 ' 1ih9ti6 1108 11 FS~O ooil 2 c aooir *SM St;ige li~y fir Btlffr *~ ~  :::::::>-<:::.: ' ><**

  • ~~

F830 0,04 2 'C: 00012 SM. StageB.av:flr.Butf/

>-<=* >< **~

F830 004' i i; (JoiJi3 sfvl .SillJle'Bay fir tfoffr ><:* ><'

~**. "><'.

14. FS?O ,004 2  !' 0001.4, -$M StagifOay Fir Oullr,

>< ~

~

15 FS~O* 004 *2 ' c;; 00015 sfvi Stage'Dlly fir Duffr -~1  :::.:::=-:::::: ~ ~

Ludlum 2929 Benchtoll lnst.rument

.,m,1.,nq bkg <(HJfll 12929 S/N: 182$97 rate \Imo MD/\

itDIV/01 143*10*1S/N:188736

a. 0;364.

rpm* min <lpmrierurcJ Tech ASign/ Date<7,, .1J,,A;,,//1-1~1!.. 1 77.6 '

  • ~aLDue Date: 5/13/2017 f3 0.434,k Tech BSign/ Datef i:. fo mln 4mv per arc",

Page 3 Att. 4 Data Assessment revl F8300042

Rancho Seco Final Status Survey Summary Report February 2, 2017 IOSB Truck Bay rev1 Survey Unit F8300053 FSS Engineer Reviewed By: _ _ ~

/,(f '----:) --- Date:_-_-_

4132017 __

Lead FSS Engineer Approved By: ~t:....__ Date: 'f!trt1 /1~

Manage;R :h:seco Assets

FINAL STATUS SURVEY F8300053 Survey Unit:

F8300053, Interim Onsite Storage Building (IOSB) Truck Bay Survey Unit

Description:

Operating History: The Truck Bay was designed as a location for loading and unloading of transport vehicles. There was a known area of contamination near the loading dock.

This area was fully characterized during the scoping surveys.

Site Characterization: Static measurements were made on the floor, walls, and ceiling, to confirm the absence or presence of plant-derived radionuclides. Static measurements showed a mean gross beta activity level of 2,374 dpm/100 cm2 and a maximum value of 3,517 dpm/100 cm2

  • Based upon the scanning results of the Truck Bay, an elevated area was identified on the floor around and including the loading dock. Certain spots in the area exceeded the DCGLw but not the DCGLEMC* An area of known contamination was identified at the loading dock area. This area was characterized to determine the extent and highest activity. The area of elevated activity was approximately 7.5 m 2 around the loading dock. A smaller area (less than 1.0 m2) exceeded the DCGLw with activity detected as high as 249,491 dpm/100 cm2
  • The smaller elevated area was designated as Loading Dock Class 1 (F8300071), requiring remediation and was buffered from the Truck Bay Class 3 (F8300053) with the Loading Dock Class 2 (F8300082)

Survey Unit. The Loading Dock Class 1 and Class 2 Survey Units are each the subject of separate reports.

The remainder of the truck bay is a Class 3 and identified as IOSB Truck Bay (F8300053) Survey Unit and is the subject of this report.

Survey Unit Design Information:

The Survey Unit Design Parameters are presented in Table 1. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were randomly determined and approximately 11 % of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 .

1 FSS IOSB Truck Bay revl F8300053

FINAL STATUS SURVEYF8300053 Table 1, Survey Unit Design Parameters 1:1 :. *-*~':1+*:.~;rf:Y:aluati~tl;;lnputVah.1es'i'.'.':' * ... ..

  • ,*,~ l~~.\tiL . ; > :Comments'*;\f:;~

" *. '*' .,,, " '.::i>;;

, i\3~

Survey Packaqe: F830 IOSB Truck Bay Survey Unit: 005 Class 3 SU Area (m ) 2 379 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor N/A Class 3 Design DCGLemc (dpm/100cm 2 ): N/A Class 3 DCGLemc: N/A Class 3 LBGR: 21,500 Default= 50% DCGL Siqma: 466 Scopinq Survev Data Type I error: 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m 2 ) N/A Total Instrument Efficiency: 0.132 Total Area Scanned (m 2 ): 45.5 Scan Coveraqe (%) ;.:... '11% Class 3 Choosing 'N/A' sets material Material Type: N/A background to "O"

,>;~+/-:'**** .*. .c ,... J . ('(f'"\lfi:i+ ...**.*...  ;.

  • .. a .(;.u..c:t..e *. a. .J1(;!$1;1~:,;;;::*,' *.*:'.\:~\~\**:: . "\~**;;*::.a

..... "'m. <<;tP*19;... **~**':'

  • >* .*..***..*~Jn * '.:,%1{

Z1-ct: 1:645 Z1-s: ** 1.645 Sign p: 0.9f,)865 Calculated Relative Shift: 46.1 Relative Shift Used: 3:0 Uses 3.0 if Relative Shift >3 N-Value: 11 N-Value+20%: *. 14 2 FSS IOSB Truck Bay revl F8300053

FINAL STATUS SURVEY F8300053 Survey Results:

A total of 15 direct measurements were made in F8300053. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

Table 2, Static Measurement Results

,;.*;;!:. /.

'Beta.* .;-::: Beta

.N1Jmber:.  ?~mpl~# .. *1

'cclllrn/100 crn2)'

' ,,,,. *' -';. ' '.; _A

  • Cc * ~- ;.t::i' ;

1.:*' ... ;;: '..-,' ::*,..'. ~ - (cpm)***:* *" ,

1 F8300053C00001 222 1,721 2 F8300053C00002 225 1,744 3 F8300053C00003 238 1,845 4 F8300053C00004 279 2,163 5 F8300053C00005 268 2,078 6 F8300053C00006 221 1,713 7 F8300053C00007 238 1,845 8 F8300053C00008 256 1,984 9 F8300053C00009 264 2,047 10 F8300053C00010 219 1,698 11 F8300053C00011 332 2,515 12 F8300053COOO 12 361 2,735 13 F8300053C00013 446 3,379 14 F8300053C00014 449 3,402 15 F8300053C00015 360 2,727 Table 3 contains the statistical summary of the static measurement data for the Truck Bay.

Table 3, Beta Summary Statistics Beta Static Truck Bay Mean 2,240 Median 2,047 Standard Deviation 582 Minimum 1,698 Maximum 3,402 Count 15 3 FSS IOSB Truck Bay revl f 8300053

FINAL STATUS SURVEY F8300053 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.

Table 4, Data Assessment Results Number of Sam les: *. >'15 Median:

Mean:

Static Data Standard Deviation:

Maximum:

Maximum value <DCGLw:

Median value <DCGLw:

Mean value <DCGLw:

Maximum value <DCGLemc:

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, this did not affect the relative shift 4 FSS IOSB Truck Bay revl f 8300053

FINAL STATUS SURVEY F8300053 as both were in excess of maximum amount and required adjustment to 3.0 No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS ofthis survey unit was properly designed as a Class 3 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300053 meets the release criteria of 10CFR20.1402.

5 FSS IOSB Truck Bay revl f 8300053

Attachment 1 Maps February 2, 2017 Survey Unit F8300053

Ceiling F8300053C00012 13 = 2,735 dpm/100 cm 2 8300053C00015 13 = 2,727 dpm/100 cm 2 North Wall F8300053C00009 13 = 2,047 dpm/100 cm 2 F8300053C00008 13 = 1,984 dpm/100 cm 2 8300053C00001 13 = 1,721 dpm/100 cm 2 F8300053C00011 13 = 2,515 dpm/100 cm 2 East Wall F8300053C00005 F8300053C00006 13 = 2,078 dpm/100 cm 2 Floor 13 = 1,713 dpm/100 cm 2 F8300053C00014

~13 =

13 = 3,402 dpm/100 cm 2 ' F830005'C00004 2,163 dpm/100 cm 2 F8300053C00002 South Wall 13 = 1,744 dpm/100 cm 2 F8300053C00013 13 = 3,379 dpm/100 cm 2 F8300053C00010 F8300053C00003 13 = 1,698 dpm/100 cm 2 13 = 1,845 dpm/100 cm 2

!DEWATER IN RADfOLOGICA.L S 'ERVICE9 Location: Rancho Seco SMUD Tosk: Final Status Sorve Approved by.

Drown B .

Approval dote:

Dote:

Rev No .:

Page 1 Att. 1 Maps rev 1 F8300053

Attachment 2 Instrumentation February 3, 2017 Survey Unit F8300053

Table 2-1. Survey Unit Instrumentation Me~surem~~i * * * *********** .*.*. :c:Minim~m DetectableAc.tivitya **Detector * *, :Calibratioll Type Instrumen~ Typ~*  ; >;, * ** * *

  • Effi.ci~llcies. . . Duel>ilfoii' Beta Static Ludlum Model Beta - 51 O dpm/100 cm2 12.9% 317899/331973 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Beta Static Ludlum Model Beta - 556 dpm/l 00 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta-74 dpm/100 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- 5/13/17 10-1 Swipe Ludlum Model 2929 Beta - 77 dpm/100 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- 5/13/17 10-1 a Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300053

Static Measurement MDA

~
.d;:J?.§ta,J Survey Type PR331973 Detector Number r=,-~,.,...,,....,,,.,,_,._,_.~~** "~~~~.,...,,.~
  • ~'82 l Background count rate (cpm)

L~~i~ !:~:i~z:::)(cm')

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2)

Static MDA dpm/100 cm2 Page 2 Att. 2 Instrumentation revl f 8300053

~:';:[:~~~e.t§J Survey Type PR331972 Detector Number f';*-*:** 229"1

,.. .  : ..* .*I Background count rate (cpm)

'* * **. /  ;~,;1 Count Time (min)

. *.** .** , 0.132 *1 Efficiency

  • '* :..~L1QQJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

r-~---;*---**-v-.* ~~--i Static MDA  !.::.~ ___ §§13d dpm/100 cm 2 Page 3 Att. 2 Instrumentation revl f 8300053

Attachment 3 Investigation February 2, 2017 Survey Unit F8300053 (none required)

Att. 3 Investigation rev 1 F8300053

Attachment 4 Data Assessment February 3, 2017 Survey Unit F8300053

Activ~

Histogram for Beta Static Activ ity (dpm/100cm2) Truck Bay NtrrberdVUs Minm.m 1,697.67 Maxinun 3.<m .52 SD 581.

Skewnen 1.(19 KIA"toiis 0.05 BM- 2.239.65 el ""°'"Didib.6on

~Normal 2,046.51 eLeuBN O Mcwe Bn.

2726 34119 Page 1 Att. 4 Data Assessment rev 1 F8300053

Mean* 2240 Sd

  • 581.9 Slooo*561.2 lnlflfcept*2240 Conelotioo.R a921 0
  • sestF11LN
  • 1.5 *1.0 *0.5 0.0 0.5 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment revl F8300053

Swip(! Shilet truck bay LC1 L<:2 LCll LC4 LC6 St.tmplo C<>mrnonts 1'890 HJQ!J. g c ODOO:t HlllO 005 a c 00002 ra90 00!\ 3 i; 0¢0011

~IHO QO!l ~ e 00004 SM . Truck BllY *2 1111a f'ii30 005 <! (; 0(100$ SM ....... JruckBav -'11 0841 FB!IO : OO!i $ c (JO()()(J SM *13 0848 i'aso oos 3 c 110001 *20 OS4ll 1'1l~o oos 3 .C 00008 1421

    • ~s~o oos ~ c: (10009 ~15 .1422

.10 .M30 . 00~ 3 c QOQJ.O 5 OSSO 11 f830 005 3 c. ()0011 SM *6 09/il/15 OB52 12 P830 005 3 c OrJOlZ SM 0~/21/16 0853 13 FSl!O 005 ~. c 000i!1 SM 09/21/JG OSS!i 14 Faao oos 3 .e: 0001.4 SM Oll!i'i lS F1;1~0 ()0$ 3 .C: (JIJ()l,$ SM QP/21/19 oass Comments By signature botow, tho required soureo eheclrnnd bsckeround checks were Siltitfactorlly pqrforrncd prlorto \l~ll of the 111,~ru1ru~nt ldent!flod IHil<iw, Beta background" 1/4/17. Second fleta.backsround =.IJ/21/16 Due Date: 5/13/2017 Page,lof;l Page4 Att. 4 Data Assessment revl F8300053

Rancho Seco Final Status Survey Summary Report January 30, 2017 IOSB Hot Cell rev1 Survey Unit F8300061

\ \

\

Prepared By=---~=,,~-\ 1:i-L_~-_;-1:'------

....... Date: 4-13-2017 FSS Engineer Reviewed By: _ _ tJe~-- 4 13 2 0 17 Date:__-_ _-_ _ _ _

Lead FSS Engineer Approved By: ~- Date: /./fie;lr M:age;,R:oseco Assets

FINAL STATUS SURVEY F8300061 Survey Unit:

F8300061, Interim Onsite Storage Building (IOSB) Hot Cell Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), each storage cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Static measurements were made on the floor and wall surfaces, to confirm the absence or presence of plant-derived radionuclides. Static measurements showed a mean gross beta activity level of 2,880 dpm/100 cm2 and a maximum value of 5,112 dpm/100 cm2

  • Previous surveys and floor scanning indicated significant contamination in excess of the DCGLw. This Hot Cell area was identified and characterized separately as a hot spot. The average static measurement in this hot spot was 390,104 dpm/100 cm2 and a maximum value of 2,285,418 dpm/100 cm2 . The hot spot was remediated prior to performance of the FSS.

Based upon the hot spot, the Hot Cell was classified as a MARSSIM Class 1 survey unit.

An adjacent Survey Unit, Hot Cell Buffer Class 2 (F8300062) was created as the buffer between the Hot Cell Class 1 (F8300061) and the remainder of the IOSB Truck Bay Class 1 (F8300053). The Hot Cell Buffer Class 2 (F8300062) Survey Unit is identified as the horizontal and vertical surfaces at the top of each of the four walls at the Hot Cell cover seating surface. The Hot Cell Buffer Class 2 (F8300062) and IOSB Truck Bay Class 3 (F8300053) Survey units each are the subject of separate reports.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than 10 m2 or land areas less than 100 m2 . In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these sm:;i.ller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than ten square meter (8 m2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were based upon professional judgment in accordance with MARSSIM guidance and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

1 FSS Hot Cell revl F8300061

FINAL STATUS SURVEY F8300061 Table 1, Survey Unit Design Parameters Survey Package: F830 Hot Cell Survey Unit: 006 Class 1 SU Area (m 2) 8 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor 3.3 Class 1 Design DCGLemc (dpm/100cm 2 ): 141,900 Class 1 LBGR: 21,500 Default= 50% DCGL Siqma: 740 Scopinq Survey Data Type I error: *. 0.05.

Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.129 Total Area Scanned (m 2): 8 Scan Coveraqe (%) * .;100%; Class 1 Choosing 'N/A' sets material Material Type: N/A background to "O"

  • **;: 2)~;~;.:;:.~{?"ci1~y1~t~c1::va1u~s ..* * ::*/,'.'. .,. '* :'.. \2'. '..;.,'~=*s.comm*~nt$~~;*~** * ** **~*

Z1-cx: ' *j_545 Siqn p: 0.99865 Calculated Relative Shift: 29,0 Relative Shift Used: . *. . 3.0 Uses 3.0 if Relative Shift >3 N-Value: * .:** .. 11.

N-Value+20%: ..* j4*

Survey Results:

A total of 15 direct measurements were made in F8300061. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

2 FSS Hot Cell revl F8300061

FINAL STATUS SURVEYF8300061 Table 2, Static Measurement Results

.~~ta (cpm)

,~;
. . ! . *.!  ;> ,, *.**'ii!<.!**:.*! 1 '; > .*.!'.;!**';' *, > !.;,,,,,.

,:Numbe,t,, ,* >

Sar,lple "

,,.,+;.;;;!._;

r;:;r' * .; ' '*'  !

,_

  • 1 Be.ta (dplll) '

',;*'* .. <>> .!'> ', ,",, "'. ".:"'. ",<,, ' *' v" !;,,* * ' ' .,, *~~,,~; :- *:**:, ,, *:;*;

1 F8300061X00001 364 2,758 2 F8300061 X00002 396 3,000 3 F8300061X00003 425 3,220 4 F8300061X00004 362 2,742 5 F8300061X00005 350 2,652 6 F8300061X00006 435 3,295 7 F8300061X00007 605 4,583 8 F8300061X00008 397 3,008 9 F8300061X00009 414 3,136 10 F8300061X00010 314 2,379 11 F8300061X00011 362 2,742 12 F8300061X00012 282 2,136 13 F8300061X00013 357 2,705 14 F8300061X00014 423 3,205 15 F8300061X00015 407 3,083 Table 3 contains the statistical summary of the static measurement data for the Hot Cell.

Table 3, Beta Summary Statistics Beta Static Hot Cell Mean 2,976 Median 3,000 Standard Deviation 550 Minimum 2, 136 Maximum 4,583 Count 15 Survey Unit Data Assessment:

The survey design required 15 static measurements located based upon professional judgment. Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS Hot Cell rev 1 F8300061

FINAL STATUS SURVEY F8300061 Table 4, Data Assessment Results Static Data Values Comments Number of Samples: 15 Median: 3,000 Mean: 2,976 Static Data Standard Deviation: 550 Maximum: 4,583 Sign Test Results Comments Adjusted N Value: 14 S+ Value: 15 Critical Value: 10 Criteria Satisfaction

  • Comments Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: N/A Sign test results: N/A Final Status Comments The survev unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

Residual radioactivity following remediation is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 1 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 1 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

4 FSS Hot Cell revl F8300061

FINAL STATUS SURVEYF8300061 The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300061 meets the release criteria of 10CFR20.1402.

5 FSS Hot Cell revl F8300061

Attachment 1 Maps January 30, 2017 Survey Unit F8300061

N

& f l 300061 X0003 W13 3,220 dpm/100 cm2 F8300061 X0009 $

13=3,136 dpm/100 cm2 F8300061X0002 ~

f3 =3,000 dpm/100 c;r¥'

F8300061X0011 13 =2,742 dpm/100 cm2

& F8300061 X0015 &F8300061X0014

&F8300061X0006 W13 =3,202 dpm/100 crh2 W f3 =3,083 dpm/100 cm 2 Wf3 =3,295 dpm/100 cm2 F8300061 X0013 $F8300061X0008 f3 =2,705 dpm/100 c f3 =3.00 8 dpm/100 .%.F8300061X0005 w f3 =2,652 dpm/10 cm2 F8300061X0007 $

&F8300061X0004 f3 =4,583 dpm/100 cm2

'\1713 =2,742 dpm/100 cm2 F8300061X0001 $ &F8300061X0010 13 =2,758 dpm/100 cm2 W13 =2,379 dpm/100 cm2 F8300061X0012 SMUD W.ii TIDEWATER INC EWGINEtfl:S I SC1EN1 1STS I PROGRAM MAHAGUIS f3 =2,136 dpm/100 cm2 ~

DAW BAY

  • HOT CELL Location: Ran cho Seco SMUD Ta!lk: Fina l S t a tu s Surve Approved by:

Drawing No.: IOS B Fi nal St a tu s Surve

Description:

HOT CELL Drown B . C Gra 0 6 9 12 QC'd: J Reese Approval dote:

Dote: 0U62017 5aile 1n feet Rev No.:

Page 1 Att. 1 Maps rev l F8300061

Attachment 2 Instrumentation January 25, 2017 Survey Unit F83000061

Table 2-1. Survey Unit Instrumentation Me~suremerij *. Instrunfen't'Type * ~irtimu\fll ~~tectable:Activity~ Det~cttir'  : : Calibratiorl r:!

,.;Type ... : ':Efficiencies <:. ,:,:Jlue Dateb ;,:;

Beta Static Ludlum Model Beta - 466 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 74.5 dpm/100 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- 5/13/17 10-1

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation rev 1 F8300061

Static Measurement MDA L.ci..~~.§.~!.~:} Survey Type PR331972 Detector Number

  • :*
  • J58 l
    • -*************".'C'--~l 1

Background count rate (cpm)

    • * . 1. j Count Time (min) 0: 132,, Efficiency 1

...*... JQQJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA J

Page 2 Att. 2 Instrumentation rev 1 F8300061

Attachment 3 Investigation January 30, 2017 Survey Unit F8300061 (none required)

Att. 3 Investigation revl F8300061

Attachment 4 Data Assessment January 25, 2017 Survey Unit F8300061

Histogram for Beta Static Activity (dpm/100cm2) Hot Cell Activ-,

NU'l'berrJVak.aes 1 Mri'run 2.1 3636 M""""' *.583.33 SD 5'~

Skewneu 1.6' Kiitosis ~OS

!i'JM..., 2~7a26

!i'J M°""' 3.000.00

[3 Nom\&I DisttWion Olen Bini O MoreBiia 0 .

3426 3670 3915 4160 4'05 Page 1 Att. 4 Data Assessment rev 1 F8300061

~----*---*-**----

Q-Q Plot for Beta Static Activity (dpm/100cm2) Hot Cell N*15 Maan*2976 Sd*5'a9 Slooe*520.8 lnlflfcept*2976 4400 Cotreletion.R *O.OCIS

  • eest Ftt t.ne 2400
  • 1.5 *1.0 -0.5 no Q5 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300061

Srnear_Data_Calculation_Sheet_101316

~

IQSB Final Status Survey LC1 LC2 LC3. l.C4 LC6 LCS llCPM (Jdpm D<ite/Tiine of.eount Sample Comments*

1 F830 DOG 1 c 00001 SM Hottell 49 10 11/01/16 1210 2 F830 ,006 1 c 00002 SM ,Hotccn S3 20 11/01/16 1211 3 F~30 006' l' c '00003 SM Hot Cell so 13 11/01/16 1212 4 F830 {)06 l *c 00004 SM.* Hot<:elf :58 31 11/01/16 1214 5 F830 o.66 1 c fJOO.OS 5M Hottell -44 -1 11/01/16 1i15 6 fBSO 006 l c oopoa ;SM Hot'C~ll 47 6 11/01/16 1216 7 F$30 Ob6'. . '1. c iJoiJ07 SM Hoicen 53 20 11/01/16 -1217 8 FS30 .()06 c *00068_ SNJ H9tcdt 1-53 7.0 ;11/01/16 1219 9 F830. 006 1 c oooo!i* SM Hottell. 52 17 11/01/16 1220 10 fl.'.30 006 1 c 00010 SM Hottell 59 33 11/01/16 1221 11 FB30 006 1 t- ' oooi1 _sri. Hot Cell 47* 6 11/01/lG 1222 12 FS30 .006 1 t* oooil SM HqtCe!I I* '49 10 11/01/16 1224 13 *F830. OOG 1 c boot's. Sf~ Hou:~fi 51 15 11/01/16 1225 14 F830 OOG 1 c 00014 SM. Horcen 62 40 11/01/16 1226 15 F83Q 006 l. ' .'c QQ01S SM ifoiccn 42 -6 11/01/16 1227 Commeiits By ~zriattue befow_;~he required source ti)~c.k and batkf,rQtinifc.tu.?d{s wire :53li:i.Jtiori!y Ptrkmned 1ulor to use af the lnMrumcllt idcntifkd btlo\'4*,

Ludlum 2929 Benchtop Instrument 1'~E

~fident\' bkg ro~nt 2929 S/N: 182597 rate time MOA llDIV/01 143*10*1S/N:188736 a 0.364 qim min dpm perare11 ch A Sign/ Date (L, 1AVJ;A /12-£~//, 44.5 1 74.5

  • ~loue Oate:.5/13/2017 r:> 0;434 Sign/Date/ 'NJ.'i c:pm min rlpmpcrnro~

Page 3 Att. 4 Data Assessment rev 1 F8300061

Rancho Seco Final Status Survey Summary Report January 30, 2017 IOSB Hot Cell Class 2 rev1 Survey Unit F8300062 c\ /~\.

Prepared By: _ _ _

/ ,G

\_..-_-~1----11----- Date: 4-13-2017 FSS Engineer Reviewed By: _ _ ~- Date: 4-13-2017 Lead FSS Engineer

FINAL STATUS SURVEY F8300062 Survey Unit:

F8300062, Interim Onsite Storage Building (IOSB) Hot Cell Class 2 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the hot cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items. The Class 2 survey area encompasses the the walls above six feet up to and including the ledge where the lid rests.

Site Characterization: Static measurements were made on the floor and wall surfaces, to confirm the absence or presence of plant-derived radionuclides. Static measurements within the hot cell showed a mean gross beta activity level of 2,880 dpm/100 cm2 and a maximum value of 5,112 dpm/100 cm2

  • Previous surveys and floor scanning indicated significant contamination in excess of the DCGLw. This Hot Cell Class 1 (F8300061) area was identified and characterized separately as a hot spot. The average static measurement in this hot spot was 390, 104 dpm/100 cm2 and a maximum value of 2,285,418 dpm/100 cm2. The hot spot was remediated prior to performance of the FSS. Based upon the hot spot, the Hot Cell was classified as a MARSSIM Class 1 survey unit.

An adjacent Survey Unit, Hot Cell Buffer Class 2 (F8300062), the subject of this report, was created as the buffer between the Hot Cell Class 1 (F8300061) and the remainder of the IOSB Truck Bay Class 3 (F8300053). This Hot Cell Buffer Survey Unit (F8300062) is identified as the horizonal and vertical surfaces (above seven feet) at the top of each of the four walls of the hot cell cover seating surface.

The Hot Cell Class 1 (F8300061) and IOSB Truck Bay Class 3 (F8300053) Survey units each are the subject of separate FSS reports.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than 10 m2 or land areas less than 100 m2 . In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these smaller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than ten square meter (7.6 m2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were determined by professional judgment in accordance with MARSSIM guidance and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

1 FSS Hot Cell Class 2 revl F8300062

FINAL STATUS SURVEY F8300062 Table 1, Survey Unit Design Parameters

.'.d;\;~-;;: .;>;:,1;~1iev~JJ1a"tlon 'loij_ttt~va:m~$;',;" tt _:;:,.~ C;;;,; i}:!;\i~'f,ft;;,:;~g;:.i:~cbmmerits*'*:_/: :~~J .:- _-',;J>

Survey Package: F830 Hot Cell Class 2 Survey Unit: 006 Class 2 SU Area (m 2) 8 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor NA Class 2 Desiqn DCGLemc (dpm/100cm 2 ): NA Class 2 LBGR: 21,500 Default= 50% DCGL Siqma: 740 Scopinq Survey Data Type I error: . _ 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m 2) N/A Total Instrument Efficiency: 0.129 Total Area Scanned (m 2): 7.6 Scan Coveraqe (%) 100% Class 2 Choosing 'N/A' sets material Material Type: N/A background to "O"

,. -*;1*'t: <Y' ,_. _.; ,_: e~1tiurate<.t.Vahtes~i~':!:::,::*: - -* '_: ;10;;;!l : - ,\r-*1:*e~1"rim~nt$ -,_-,.: ,..:'"i::;;:-,::;

Z1-a: I . }.645 Z1-p: -*- '1.645 Sign p: 0.99865 Calculated Relative Shift: 1

> 29.0 Relative Shift Used: 3,0 Uses 3.0 if Relative Shift >3 Values selected based upon N-Value: I - 15 Judgement Values selected based upon N-Value+20%: 15 Judqement Survey Results:

A total of 15 direct measurements were made in F8300062 following the guidance from MARSSIM section 4.6. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

2 FSS Hot Cell Class 2 revl F8300062

- ----- ---------- - - - - - - - ---------------~

FINAL STATUS SURVEY F8300062 Table 2, Static Measurement Results S~mpl~J/  :. ::.**:,:**1*;;~~t~*:{~~111)'**.* * , ;* "

.* t\Jhmb~r . %1

          • &et~ (dpm) . *
  • <>::< I . '?> *: ... **.:*. ' .. I 1 F8300062X00001 314 2,379 2 F8300062X00002 299 2,265 3 F8300062X00003 392 2,970 4 F8300062X00004 272 2,061 5 F8300062X00005 378 2,864 6 F8300062X00006 303 2,295 7 F8300062X00007 324 2,455 8 F8300062X00008 311 2,356 9 F8300062X00009 313 2 371 10 F8300062X00010 310 2 348 11 F8300062X00011 245 1 856 12 F8300062X00012 255 1 932 13 F8300062X00013 279 2 114 14 F8300062X00014 306 2 318 15 F8300062X00015 300 2 273 Table 3 contains the statistical summary of the static measurement data for the Hot Cell Class 2.

Table 3, Beta Summary Statistics Beta Static Hot Cell Class 2 Mean 2,324 Median 2,318 Standard Deviation 296 Minimum 1,856 Maximum 2,970 Count 15 Survey Unit Data Assessment:

The survey design was based upon professional judgement and resulted in 15 static measurements. Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS Hot Cell Class 2 revl F8300062

FINAL STATUS SURVEY F8300062 Table 4, Data Assessment Results

.:~[~fi:~ ..~ " ..*" . *sja1:1~*.tiata.:va.1,:.t.~$;~,;,:.;::J . :' '.\:+/-'~.:.:::.:: ~:}'.~J~{K..~~;.*1.* '¢ommeiiiii ~ .'~;1?.i>;il;:*.* . ~~Ri Number of Samples: *******. 15 Median: 2,318 Mean: 2;324 Static Data Standard Deviation: *.*..*

  • 296 Maximum: 2,970
  • .'..'.' '"' t'if:;:'.Siatl}'re&t Resu)ts;..s * ..* 5 *.* Comment$.
  • 1 '11<"* .*\:i:*

Adjusted N Value: *. '. 14 S+ Value: 15 Critical Value:

  • 1O*

Sufficient samples collected: Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass*

Mean value <DCGLw:

  • Pass
  • Maximum value <DCGLemc: NIA Sign test results: N/A
      • ¥ .. :.*\il'.'!~~*lil:< *.. * * *.*Pi;1ti~t "'....~ ....; ;\*1:*'4il1~5*01~:~.*::*s~~~1~::0. t~~1\~~~*~~:~~;:'~h* :~Bmm~nls'~"'t'\\;\h. *.../t' The survey unit passes all conditions: **!?ass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 2 survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS ofthis survey unit was properly designed as a Class 2 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

4 FSS Hot Cell Class 2 revl F8300062

FINAL STATUS SURVEY F8300062 The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300062 meets the release criteria of 10CFR20.1402.

5 FSS Hot Cell Class 2 revl F8300062

Attachment 1 Maps January 30, 2017 Survey Unit F8300062

N F8300062X0009 F8300062X0005 p = 2,371 dpm/100 cm 2 p = 2,864 dpm/100 cm 2 F8300062X0013 F8300062X0007

~~~~~~~~~~~~~~-=c.~:.=_::~~~;;;:-~~~~~~~~~~-/--:r-_._~I p = 2, 114 dpm/100 cm 2

=2 455 dpm/100 cm 2 F8300062X0001

=

p 2,379 dpm/100 cm 2 F8300062X0015 Top Edge of Hot Cell p = 2,273 dpm/100 cm 2 Bottom Edge of hot Cell (-1 ')

F8300062X0003 p = 2,970 dpm/100 cm 2 F8300062X0010 p =2,348 dpm/100 cm 2 Hot Cell Floor (-7')

F8300062X0006 F8300062X0014 P=2,295 dpm/100 cm 2 p = 2,318 dpm/100 cm 2 F8300062X0004 p =2,061 dpm/100 cm 2 F8300062X0008 p =2,356 dpm/100 cm 2 Hot Cell Drain (approx.)

F8300062X0011 p = 1,856 dpm/100 cm 2 0

Reference point (x=O, y=O, z=1 )

F8300062X0002 TIDEWATER INC p =2,265 dpm/100 cm 2 SMUD RADIOL O GICAL SERVICES F8300062X0012 Cootroct No. : 4500091426 SMUD p =1,932 dpm/100 cm 2 Locotioo: Rancho Seco

=.:....~~

i..;:T.:.=osk.::..: F i:;,:..:

na'-' l '--'

st:.;:_

at:.;:_

u s- 5-ur-ve- - - ; Approved by.

Drawing No.: NA Descriptloo:

Drown B

Approval dote:

Dote: 01292017 Rev No.:

Page 1 Att. 1 Maps rev l F8300062

Attachment 2 Instrumentation January 30, 2017 Survey Unit F83000062

Table 2-1. Survey Unit Instrumentation Measurement De!~~tor. *.Gal~bration

<Type .. <' Effidenci.es

  • I>tiJ'nateb .**

Beta Static Ludlum Model Beta - 499 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 77 dpm/l 00 cm2 43.4% 1825971188736 Measurements Ludlum Model 44- 5/13/17 10-1

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300062

Static Measurement MDA f"'"<<'*r~~-.~~*v.v .. v~'.~'"j L"'""""!?§taJ Survey Type PR331972 Detector Number

!:" .,.~-.-~:J'~~**i** Backgro_und co~nt rate (cpm)

r. . **** 1 *.* Count Time (mm)

[ *.... *. '.. ~.1*~2 j Efficiency 0;~ .....:2 0 ;LQO..J Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page 2 Att. 2 Instrumentation revl F8300062

Attachment 3 Investigation January 30, 2017 Survey Unit F8300062 (none required)

Att. 3 Investigation revl F8300062

Attachment 4 Data Assessment January 30, 2017 Survey Unit F8300062

Histogram for Beta Static Activity (dpm/100 cm2) Hot Cell Class 2 Activ*

N.-o1v..... 1 Mrirun 1,856.06 M..mum 2,969.70 so 29!i Skewness 0.76 Kutosis 1.07 l;!I M..., 2.323.7*

(;!! Mod4n 2.31a1a

~ NorrnalDistrb.ticn OLessem 0 More8ins 1

1893 2005 2116 m1 2339 I 2150 2561 2573 278< 2895 Page 1 Att. 4 Data Assessment revl f 8300062

Q.Q Plot for Beta Static Activity (dpm/100 cm2) Hot Cell Class 2 Me.Y1 *2324 Sd

  • 295.9 Slooe *293.7 lnletcept . 2324 Co<<elotion.R *QS49
  • aestF.tlh 2600
  • 1 .5 *1.0 -0.5 no 0.5 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300062

Smear_Oata_Calculation_Sheet_101316 IOSB FinalStatus Survey LCl LC2. LC3 LC4 LC6 LCS {lCPM papm OatejTimc of Count Sample Comments 1 F830 006 2 c 00001 SM Ho~ Cell Buffer .. 42 -14 11/04/16* 1323.

2 F830. 006 2 *c ooiJo2 :s.M Mot C!!.ll Buff~r . 50. 5 11/04/16 1324 3 1'830 006 2 c. oooos SM l'ioi Cl'll Buffer 58 23 11/04/16 1325 4 H,130* 005 2 c OO{JQ1. SJV1 Hot .Cell Buffer 50 *:*. 5 11/04/16 1326 5 ~~3(} < 006 2 c 00005 $~ Hot Cell!)uffer .. 41 -16 11/04/16 1328 6 F830 006 2 :c OOOOGc SM Hot C<'!l Burrei- 57 21 11/04/16 1329 7 F830 006 2 c 00007 SM Hot Cell Buffor 45 -7 ll/04/16 1330 s 1'830: \){)5 2* C; 00001!' SM Hol CCII 13iiffer. 49 2 11/0*l/16 1331 9

  • F830: 006 z C: o6oo9 SM Hot Cell Buffer 46 -5 U/04/16 1333 10 f830 *oos
  • 2 C. 00010 SM. Hot cell Buf~er 49: 2 11/M/.16 1334 11 rs3o 006 2 c 00011 SM' Hot: Celt !Jtiffer 37 -25 11/04/16 1335 12 F830 006 2 c 00012 SM Hbt Celt Buffer 45 *7 11/04/16 1336 HotCelf ll(iiTur *

~~

13 'C pi)013 SM ** S4 14 11/04/lfi 1337 14 C, 00014* SM I notcell !lof(er. 52 9 11/04/16 1339 15 F830 006 2 . c 00015 .SM Moiccu llulfer 45 -7 11/04/lG 1340 Comments 6y sign;Jtuni below,. the f'l!QJ1ireQ ~o(irte chC!-cX nn.d b3ctg.roo'm:J thc:~k-:i. we<e :.at~factorliy pmfomt-i:d _prl~f' to U::lC of the- '11:;,tn,1me0Udenhfied bt:>low.

Ludlum2929 Bcn<;htop Instrument bf;;;

Cffi{:jlJ~W oi1l count 14929 5/N:182597 filtC time. MOA

/l /"'.\. tlDIV/Ol II j;/( J 143*10*1 S/N: .188736 a 0.364

<:pm n:itn dpin JHJfJU'C<l Tech A Sign/ Date IV. //'</4V ,_ 48 1 77.2

!Tech B.Sign/Date '--" NI~-<:}

.t 1? *?..-IC--

Due Date; S/13/2017 p OA34 cpm min dpmp-or<.l~"'i Page 3 Att. 4 Data Assessment revl F8300062

Rancho Seco Final Status Survey Summary Report January 25, 2017 IOSB Loading Dock rev1 Survey Unit F8300071 l\

C' n \J 1 Prepared By: _ _ _ ~""---*-rr~-~_J_ """'"*V-~~-----

_* Date: 4-13-2017 FSS Engineer Reviewed By=---~~~ Date: 4-13-2017 Lead FSS Engineer Approved By: ~4-- Date: Afi9}1J-

- Manager,:; Ch<:Seco Assets

FINAL STATUS SURVEY F8300071 Survey Unit:

F8300071, Interim Onsite Storage Building (IOSB) Loading Dock Class 1 Survey Unit

Description:

Operating History: Designed primarily to store .packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), each storage cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Based upon the scanning results of the Truck Bay, an elevated area was identified on the floor around and including the loading dock. Certain spots in the area exceeded the DCGLw but not the DCGLEMc. An area of known contamination was identified at the loading dock area. This area was characterized to determine the extent and highest activity. The area of elevated activity was approximately 7.5 m2 around the loading dock. A smaller area (less than 1.0 m2) exceeded the DCGLw with activity detected as high as 249,491 dpm/100cm2

  • The elevated area was designated as a Loading Dock Class 1 (F8300071), requiring remediation and is the subject of this report.

The Loading Dock Class 2 (F8300082) area buffers the elevated area from the remainder of the IOSB Truck Bay Class 3 (F8300053) and each is the subject of a separate report.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than 10 m2 or land areas less than 100 m2. In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these smaller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than ten square meters (7.5 m2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were based on professional judgement in accordance with the LTP and approximately 100% of the area scanned. The instrumentation used for the survey

  • along with the MDC values are listed in Table 2-1 Attachment 2.

1 PSS Loading Dock Class 1 revl F8300071

FINAL STATUS SURVEY F8300071 Table 1, Survey Unit Design Parameters i;: ': .* **..* ;. , e~1aluation;:input,.Yal~es ;~~:*:~~1:'.~~. * ** .*. .*. ~*=:* < .,d;; j ..:**Comments . .. . ., .

'J't'.

Survey Packaqe: F830 Loading Dock Class 1 Survey Unit: 007 Class 1 SU Area (m 2 ) 7.5 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor 3.4 DTBD-05-003 Desiqn DCGLemc (dpm/1 OOcm 2 ): 146,200 DCGLemc: 146,200 LBGR: 21,500 Default= 50% DCGL Sigma: 466 Truck Bay Scoping Type I error: ** ... 0 ..05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.130 Total Area Scanned (m 2): 7.5 Scan Coverage (%) h 100% Class 1 Choosing 'NIA' sets material Material Type: N/A background to "O" IY'~ '"',

~,,'

,o~,?;,

. ,*~~l~~~Ht'C.1at~cl: Vaiuijs~*' * *  : }ik'::: i:>::  :** 'Y;I~\,'**,.*<\

., *. '""'""  :*. ,c<>mliien:t~~~1~~*;~i.<- ~~i~tt%~ ,),~\)

-,,',L~",

Z1-a: :1.645 Z1-a: 1.645 Siqn p: 0.99865' Calculated Relative Shift:  :; 46.1 Relative Shift Used: 3.0 Uses 3.0 if Relative Shift >3 Values selected based upon N-Value: 15 Judgement Values selected based upon N-Value+20%: >15 Judqement Survey Results:

A total of 15 direct measurements were made in F8300071. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

2 FSS Loading Dock Class 1 revl F8300071

FINAL STATUS SURVEYF8300071 Table 2, Static Measurement Results

  • . . Nlilnbef' I*

.,.;. sample.It **

.~~ta.(cpm).

~eta(dp~)*

. ' .,', ,, >  ;* 't./...f' .  ; i .*.

1 F8300071C00001 959 7,265 2 F8300071C00002 360 2,727 3 F8300071 C00003 377 2,856 4 F8300071 C00004 407 3,083 5 F8300071 C00005 533 4,038 6 F8300071C00006 477 3,614 7 F8300071 C00007 390 2,955 8 F8300071 C00008 331 2,508 9 F8300071C00009 254 1,924 10 F8300071C00010 321 2,432 11 F8300071 M00011 280 2, 121 12 F8300071 M00012 634 4,803 13 F8300071 M00013 425 3,220 14 F8300071 M00014 532 4,030 15 F8300071 M00015 249 1,886 Table 3 contains the statistical summary of the static measurement data for the Loading Dock Class 1.

Table 3, Beta Summary Statistics Beta Static Loading Dock Class 1 Mean 3,297 Median 2,955 Standard Deviation 1,376 Minimum 1,886 Maximum 7,265 Count 15 Survey Unit Data Assessment:

The survey design was based upon professional judgement and resulted in 15 static measurements. Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS Loading Dock Class 1 revl F8300071

FINAL STATUS SURVEY F8300071 Table 4, Data Assessment Results Number of Samples: 15 Median: 2;955

  • Mean: 3,297.

Static Data Standard Deviation: 1,376 *.

Maximum: 7,265

,,y.; ** .,'ii~*: * '~*.critei:j~ sati$Jaction ~'.Jk\;:: * * . < *1x;.~).*;*,*;.*:*'.\\:**;:~* ;:Gl$mments*:;~., . ,.~~~: .*.'.1\.(~

Sufficient samples collected: Pass.

Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: NIA Siqn test results: N/A

5:t . , " . 1 t*~* "~~\*ii;:lnal:sliiiJ$:~\.*,>;*  : :*... f; ':.,.. t *:~; * * * * .:.* c:i:>mm~niS: ~: :*:{*'.;,~*~'.~/*

The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

Residual radioactivity following remediation is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 1 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, no individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 1 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300071 meets the release criteria of 10CFR20.1402.

4 FSS Loading Dock Class 1 revl F8300071

Attachment 1 Maps January 30, 2017 Survey Unit F8300071

F8300071 M00009 13 = 1 ,924 dpm/100 cm 2 F8300071M00015 F8300071 M00006 13 =1,886 dpm/100 cm 2 13 = 3,614 dpm/100 cm 2 F8300071 M00012 F8300071C00001

=

13 4,803 dpm/100 cm 2 F8300071M00014 13 =7,265 dpm/100 cm 2 13 = 4,030 dpm/100 cm 2 F8300071 M00011 13 =2, 121 dpm/100 cm 2 F8300071C00004 13 = 3,083 dpm/100 cm 2 F8300071C00008

~ = 2,508 dpm/100 cm 2 F8300071C00003 13 = 2,856 dpm/100 cm 2

~F8300071C00005 13 =4,038 dpm/100 cm 2 F8300071C00002

/ c IDEWATER INC f~ =2,727 dpm/100 cm 2 SMUD Approved by:

F8300071C00007 Dacriptlon:

Oro:wn B .

13 =2,955 dpm/100 cm 2 QC'd: F8300071C00010 Dote:

Rev No.:

...,prowl dote:

=

13 2,432 dpm/100 cm 2 Page 1 Att. 1 Maps rev 1 F8300071

Attachment 2 Instrumentation .

January 30, 2017 Survey Unit F8300071

Table 2-1. Survey Unit Instrumentation i Meas~renl~nt I!]:sfrum~~t,'.;i;ype'

      • MinilllurilD.e.t.ect.a.*. l:Ji{.A,:'Ctivity3 ..* > ;:J>et~ctor '.:* F*Q~libratiC>n*:

, ***. * . Type > .., , . . . ,,.;,. . .,,,. ..* . . *Efficien'cies *. . . **D*u*e**Dat'eb..

Beta Static Ludlum Model Beta - 556 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta- 76 dpm/100 cm2 43.4% 182597/188736 Measurements Ludlum Model 44- 5/13/17 10-1 a Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300071

Static Measurement MDA

[C:~:~,.=~et~~J Survey Type PR331972 Detector Number i*~*7;~i*'.:*238*j Background count rate (cpm)

~;.;t')'il:> 1 i Count Time (min) i, * ":CL1*32>i

  • ' '  :*<*: */{

Efficiency

.. .* *"'*"'~JQQJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2)

Static MDA Page2 Att. 2 Instrumentation revl F8300071

Attachment 3 Investigation January 30, 2017 Survey Unit F8300071 (none required)

Att. 3 Investigation rev 1 F8300071

Attachment 4 Data Assessment January 30, 2017 Survey Unit F8300071

Histogram for Beta Static Activity (dpm/100cm2) Loading Dock Class 1 Activly Numbe1 of Values 15 Minimum 1,886.36 Maximum 7,265.15 SD 1,376.27 Skewness 1.84 Kurtosis 4.32

~ Mean 3.297. 47

~Median 2,954.55

~ Noimal Dist1ibution D Less Bins D MOie Bins 2152 2689 3227 3765 4303 4841 5379 5917 6455 6992 Page 1 Att. 4 Data Assessment rev 1 F8300071

Activly Q-Q Plot for Beta Static Activity (dpm/100cm2) Loading Dock Class 1

'\ N

  • 15 7200 *I Mean
  • 3297 Sd
  • 1376

' Slope= 1305 Inte1cept

  • 3297 L Correlation, R
  • 0.906 6400
  • Best F~ Line 5600

~ 4800

p I u '

<(

4000 I

3200

  • I I

2400 t

  • I

-1 .5 -1. 0 -0.5 0.0 0.5 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300071

F8300071 Smear _calc

.. IOSB Fi.nal S~atus survey LC! LC2 LC3 LC4 LC6 LCS PCPM Pdpm Date/Time of Count Sample Comments 1 F$30 007  ! C 00001 SM Load Dock , 39 *18 12/29/16 1303 12/'i.9/i6 1304 12/29/16 1305 12/29/16 1306 12/29/16 1307 12/29/16 1308 12/29/16 1311 12/29/16 1312 12/29/16 1313 12/29/16 1314 12/29/16 1315 12 Jis~o 001 ** 1 ** .c:;:; .gdiJ12 *SM': .

  • Lo,adl)ql:t<?~y *40 * * -15 12/29/16 1316 12/29/16 1317 12/29/16 1319 15 Fs3o 007 I *ii: e 00015 SM* *.. ~Loa~;Qoek 41 . * -13 12/29/16 1320 Comments By signature below, the required source check and background checks ware satisfactorily performed prior to use of the instrument identified below.

Ludlum 2929 Benchtop Instrument

,~

~ffciet\"Cy bkg count 2929 S/N: 182597 rate time MDA 0.1 1'~.. :. 7.0 43-10*1S/N:188736 a 0.364 cpm min dpfOp~rarM 12/29/2016 4l5.7: i*:.*1 76.2

!Tech B Sign/ Date Cal Due Date: 5/13/2017 B 0.434 Cpm min d;:>mpera~e<J Page 3 Att. 4 Data Assessment rev 1 F8300071

Rancho Seco Final Status Survey Summary Report January 25, 2017 IOSB Loading Dock Class 2 rev1 Survey Unit F8300082 9G Prepared By: ___L--=_*'!.---+-----Date: 4-13-2017 FSS Engineer Reviewed By: _ _ ~

(,/d '---:) ,__ Date:_4-13-2017 Lead FSS Engineer Approved By: _£)~ Date: 4/1'!2/1?-

Manager, Rancho Seco Assets

FINAL STATUS SURVEY F8300082 Survey Unit:

F8300082, Interim Onsite Storage Building (IOSB) Loading Dock Class 2 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), each storage cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Based upon the scanning results of the Truck Bay, an elevated area was identified on the floor around and including the loading dock. Certain spots in the area exceeded the DCGLw but not the DCGLEMC* An area of known contamination was identified at the loading dock area. This area was characterized to determine the extent and highest activity.

The elevated activity area around the loading dock was approximately 7.5 m2 and was designated as the Loading Dock Class 1 (F8300071). Within this elevated activity area, a portion (less than 1.0 m2) exceeded the DCGLw, with activity detected as high as 249,491 dpm/100 cm2

  • This smaller elevated activity area within the Class 1 (F8300071), required remediation. The Loading Dock Class 1 (F8300071) was buffered from the Truck Bay Class 3 (F8300053) with the Loading Dock Class 2 (F8300082) Survey Unit which was approximately 19.9 m2 total. The Loading Dock Class 1 and Truck Bay Class 3 Survey Units are each the subject of separate reports.

The Loading Dock Class 2 (F8300082) is the subject of this report.

Survey Unit Design Information:

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were randomly determined in accordance with MARSSIM guidance and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1Attachment2.

1 FSS Loading Dock Class 2 revl F8300082

FINAL STATUS SURVEY F8300082 Table 1, Survey Unit Design Parameters

-~ :J'i'.~~w .-+:£¥jiit:i'ationlnp\Ji,1~aJt1~i-*~\~~~~~ :, * * * ~;:: ,, . **~;*. ii ,\ 'GO'mm¢tlt$ .

1 s~0:~':1~~ . *1:p Survey Package: F830 Loading Dock Class 2 Survey Unit 008 Class 2 SU Area (m ) 2 19.9 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor NA Class 2 Design DCGLemc (dpm/100cm 2 ): NA Class 2 DCGLemc: NA Class 2 LBGR: 21,500 Default= 50% DCGL Siqma: 466 Truck Bay Scopinq Type I error: 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.132 Total Area Scanned (m2): 15.2 Scan Coverage (%) <,;* .76% Class 2 Choosing 'N/A' sets material Material Type: N/A backqround to "O"

.~JT,,;, .* * *

.:~*t .ca:1gtil~'t~;~~1u~& 1 ..*'.:/~i~~,;1~;,*:*1~ t,~\~,d 1 >*; *~..;i~;c<>mm~nt~\tt\~1k**:* .Yi<***>**

Z1-a: -t645 Sign p: :0.99865 Calculated Relative Shift:

  • 46. t Relative Shift Used: *. ** 3.0 Uses 3.0 if Relative Shift >3 N-Value: <' .11 N-Value+20%: .. - 14.

Survey Results:

A total of 15 direct measurements were made in F8300082. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

2 FSS Loading Dock Class 2 revl F8300082

FINAL STATUS SURVEY F8300082 Table 2, Static Measurement Results Number Sample# Beta (cpm) Beta (dpm) 1 F8300082C00001 379 2,871 2 F8300082C00002 383 2,902 3 F8300082C00003 373 2,826 4 F8300082C00004 380 2,879 5 F8300082C00005 389 2,947 6 F8300082C00006 349 2,644 7 F8300082C00007 405 3,068 8 F8300082C00008 410 3,106 9 F8300082C00009 366 2,773 10 F8300082C00010 390 2,955 11 F8300082C00011 376 2,848 12 F8300082C00012 337 2,553 13 F8300082C00013 327 2,477 14 F8300082C00014 299 2,265 15 F8300082C00015 394 2,985 Table 3 contains the statistical summary of the static measurement data for the Loading Dock Class 2.

Table 3, Beta Summary Statistics Beta Static Loading Dock Class 2 Mean 2,807 Median 2,871 Standard Deviation 231 Minimum 2,265 Maximum 3,106 Count 15 Survey Unit Data Assessment:

The survey design was based upon randomly selected locations and resulted in 15 static measurements. Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS Loading Dock Class 2 revl F8300082

FINAL STATUS SURVEY F8300082 Table 4, Data Assessment Results

"~**\{,~iz~~t::* ..::St~ll<iDataVahfos * ':. ~r **.~ * , . *~***t':,,~~)tit*tJ:;,;~i* CoJri'menh;;": ,\i~i:;,~r. :~~~~t;*~

Number of Samples: 15 Median: 2,871 Mean: 2\807 1

Static Data Standard Deviation: ** 231 Maximum: 3; 106 Adjusted N Value: .* . 14.

S+ Value: " 15 Critical Value: tf

    • , . * .~,'.~'* ., cr;ltei\i~~atistactioo'7.;;"'<~ *"t:;.~. ? :: , *.. }  :,,.,*ii :~t5mments~,  ::.:.:1~:K:t**.;*t'.r' Sufficient samples collected: Pass*

Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: *.*. NA Siqn test results: ** Pass

......;.;A~~')~~* ".' " *T ,,,1::1'~PinaO?j~*t.1~1*i}l'~;* ;**r:::: . . . . *. . : > *' *'.j(.~ 9;*> cpmro~mt$*~~~". ~.*.~::::;:, *V * ,

The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 2 survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. However, no individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 2 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the L TP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300082 meets the release criteria of 10CFR20.1402.

4 FSS Loading Dock Class 2 revl F8300082

Attachment 1 Maps January 30, 2017 Survey Unit F8300082

F8300082C00003

(} = 2,826 dpm/1 00 cm 2 F8300082C00001 f3 =2,871 dpm/100 cm 2 F8300082C00008 F8300082C00010 p =3,106 dpm/100 cm' (} =2,955 dpm/100 cm' F8300082 Loading Dock Buffer Class 2 (175' elevation) F8300082 loading Dock Buffer Class 2 ( 171' elevation) F8300082C00006

(} = 2,644 dpm/100 cm 2 F8300082C00009 F8300082C00005 p =2,773 dpm/100 cm 2 p = 2,947 dpm/100 cm2 F8300082C00011 p = 2,848 dpm/100 cm 2 F8300082C00002 F8300082C00013 p = 2,902 dpm/100 cm 2 (} = 2,477 dpm/100 cm2 F8300082C00014 p = 2,265 dpm/100 cm 2 F8300082C00007 p = 3,068 dpm/100 cm 2 F8300071 Loading Dock Class 1 F8300082C00015 F8300082C00004 f3 = 2,985 dpm/1 00 cm 2 p =2,879 dpm/100 cm 2 F8300082C00012 p = 2,553 dpm/100 cm 2 TIDEWATER 11t R A D I OLOCICAl. s nnv1 c~g ass SMUD Approved by:

DHcriptlon:

Drown B .

OoU:

Rev No.:

Page 1 Att. 1 Maps rev 1 F8300082

Attachment 2 Instrumentation January 30, 2017 Survey Unit F8300082

Table 2-1. Survey Unit Instrumentation I M~asu'nmient * * ' (Minilllulll})~te~tableA?~.*.1.*:YiiY~ Detector. * *

  • Calibr~tion
  • Type *}nstrumentType ... **
  • Efflci~ncies DueDateb

. , .. ~,

Beta Static Ludlum Model Beta - 520 dpm/l 00 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 75 dpm/100 cm2 42.8% 166716/1703 80 Measurements Ludlum Model 44- 1113/16 10-1

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (D.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300082

Static Measurement MDA

-~>'v.-~v--*~-**-~v'.~{

~:...':h::::..~§_t,§1,:J Survey Type PR331972 Detector Number

  • ~;19:9.. 1 Background count rate (cpm)

. . *. .* .fl Count Time (min)

',b.132 J Efficiency

'.~=~'.1'.9.9.J Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2) r;*.,..,~-~~*;'":'~m~N,VNV""

Static MDA "~*-**** .

  • 5,2QJ dpm/100 cm 2 Page2 Att. 2 Instrumentation revl F8300082

Attachment 3 Investigation January 25, 2017 Survey Unit F8300082 (none required)

Att. 3 Investigation rev 1 F8300082

Attachment 4 Data Assessment January 30, 2017 Survey Unit F8300082

Histogram for Beta Static Activity (dpm/100cm2) Loading Dock Class 2 Activly Number of Values 15 Minimum 2.265.15 Maximum 3.106.06 so 230.76 Skewness *1.05 Kurtosis 0.77 3

~M ean

~M edian 2.806.57 2.871 .21 II

~ Normal Distribution I 0 Less Bins I,.

0More Bins I 0

0 2270 2355 2439 2523 2607 2691 2775 2859 2943 3027 Page 1 Att. 4 Data Assessment revl F8300082

Acliv~

Q-Q Plot for Beta Static Activity (dpm/100cm2) Loading Dock Class 2 N *15 Mean= 2807 Sd

  • 230.8 Slope= 230.9 3000 Intercept
  • 2807 Correlation. R
  • 0.956 I
  • 8 est F~ Line 2800

~

+;

u

<(

2600 I

- - -l I

2400 i

I I

..... .1

-1.5 *1.0 ru 00 M 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment revl F8300082

  • LCi LC2 LC~ LC4 LCi> tC5 11 7 01/04/li 12 #i.!~o* 0 .Oi/04/17 13 '.:Fa3Q* 10 01/04/11 14 '*Jfs;io, -6 01/o4/17 15 f336 (IOU __.

II-----~..._._.........

ff 01/04/17 .

Comments by slgmiturn; below, tbutoqoired &-0\lftll dwek nod back.gr-0und checks wcro satisfoctorily porforn1cd prioflQ U$e6f the Instrument idl}liliflad billow,

  • Lud.lum 2929 Bcnchtop Instrument i 1 - - - - - - - - - - - - - - - - - - - - - - - 1 r 9 Z 9 S / N : 182597 Page 3 Att. 4 Data Assessment rev I F8300082

Rancho Seco Final Status Survey Summary Report January 30, 2017 IOSB Main Sump rev1 Survey Unit F8300103 Prepare dBy:

cc'\

L--

/ *\-~ ~~w-~

~~~~---n~~-11-~~~~

r Date: 4132017 FSS Engineer Reviewed By=----~- Date:_4_-_1_3-_2_0_17__

Lead FSS Engineer Approved By:

FINAL STATUS SURVEYF8300103 Survey Unit:

F8300103, Interim Onsite Storage Building (IOSB) Main Sump Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), each storage cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Static measurements were made of the interior surfaces of the sump, to confirm the absence or presence of plant-derived radionuclides. Static measurements showed a mean gross activity level of 2,401 dpm/100 cm2 and a maximum value of 3,056 dpm/100 cm2

  • The statistics of the sump results combines walls, floor, and ceiling data.

Based on the levels of gross activity reported, the area was determined to be a Class 3 area.

Survey Unit Design Information:

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were randomly determined and approximately 14% of the area scanned by beta scanning. The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

1 FSS Main Sump revl F8300103

FINAL STATUS SURVEY F8300103 Table 1, Survey Unit Design Parameters

, :l'>:i.\J.i' ' '.1;::<,~Ev'ib1atii;>n 1nJ>ut:va1ues: *1;21,01>.lit,vr ' 1''\i:r,'>, , *r,: >>):fommerit~:r 1

<:*\ *.* ;*\\'.;'

Survey Packaqe: F830 Main Sump Survey Unit: 010 Class 3 SU Area (m 2) 80 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor NA Class 3 Desiqn DCGLemc (dpm/100cm 2 ): NA Class 3 DCGLemc: NA Class 3 LBGR: 21,500 Default =50% DCGL Sigma: 466 Scoping Survey Data for Truck Bay Type I error: ;i\. 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m 2 ) N/A Total Instrument Efficiency: 0.132 Total Area Scanned (m 2 ): 11.1 Scan Coverage(%) > 14% Class 3 Choosing 'N/A' sets material Material Type: N/A background to "O"

":z'S;\J \ '::rpa1culat~~1Miild~~~"~'1 ,,,<*::,:~?~¥*

~ ii; , '1.'.'*:'. 1?comm~his 2~',~~1*'; 'r('t;,',

1

.. i ';~\ i ,>;,':~5}/J. t':::'

i. i

*A'- *<

Z1-CL: 1:645.

Z1-B: 1.645 Sign p: '0:99865 Calculated Relative Shift: 46.1' Relative Shift Used: 3.0 Uses 3.0 if Relative Shift >3 N-Value: ',.,:, i,;i, 11 i

N-Value+20%: 14 Survey Results:

A total of 3 0 direct measurements were made in F8300103 with 15 each being collected in the upper and lower sumps. The results of the static measurements are shown in Table 2.

All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity. Swipe data did not indicate elevated activity levels above the MDA.

2 FSS Main Sump revl F8300103

FINAL STATUS SURVEY F8300103 Table 2, Static Measurement Results Number

'.'. *.:'*'i. ' I .. ~ *;.

.;c*>.:,:: . sample#,*. *. 1

/

<;~ >/;., .}

~eta(cpm)

~. ,' "

B~t~ (dpm).*. ,,.

1 F8300103X00001 307 2,326 2 F8300103X00002 302 2,288 3 F8300103X00003 312 2,364 4 F8300103X00004 206 1,561 5 F8300103X00005 234 1,773 6 F8300103X00006 244 1,848 7 F8300103X00007 260 1,970 8 F8300103X00008 215 1,629 9 F8300103X00009 243 1,841 10 F8300103X00010 209 1,583 11 F8300103X00011 248 1,879 12 F8300103X00012 220 1,667 13 F8300103X00013 288 2,182 14 F8300103X00014 294 2,227 15 F8300103X00015 234 1,773 16 F8300103X00016 249 1,886 17 F8300103X00017 258 1,955 18 F8300103X00018 255 1,932 19 F8300103X00019 296 2,242 20 F8300103X00020 208 1,576 21 F8300103X00021 229 1,735 22 F8300103X00022 215 1,629 23 F8300103X00023 242 1,833 24 F8300103X00024 208 1,576 25 F8300103X00025 247 1,871 26 F8300103X00026 258 1,955 27 F8300103X00027 228 1,727 28 F8300103X00028 223 1,689 29 F8300103X00029 252 1,909 30 F8300103X00030 305 2,311 3 FSS Main Sump revl F8300103

FINAL STATUS SURVEY F8300103 Table 3 contains the statistical summary of the static measurement data for the IOSB Main Sump.

Table 3, Beta Summary Statistics Beta Static Sumps Mean 1,891 Median 1,860 Standard Deviation 249 Minimum 1,561 Maximum 2,364 Count 30 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 30 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.

Table 4, Data Assessment Results Median: 1,860 Mean: 1,891 Static Data Standard Deviation: 249 Maximum: 2,364 t'.t **.'.i:~~~.~t:~;~ti~~ **Sitilt;:tl§l:)te$,nlt$~'i1~;;~:1~\~\1.": *** *  ;* < ,,~ **... * * ~

1 **:,c:;omm~nt§*:;<:1:;.~~;::;\,~'Pi~:**

Adjusted N Value:

  • 14 S+ Value: 30 Critical Value: 10 i.!f:~. .*. ¢i'lt~'tiasatisf~~tion. ,\\; * ** s 'Jt .>:  ;""z;:*:::::~?~~*~~~~.~:Omlfi~ll{$;:,, *.*.*. ,>'.:< * .... ;:~:
  • Sufficient samples collected: Pass Maximum value <DCGLw: Pass*

Median value <DCGLw: Pass Mean value <DCGLw: . Pass Maximum value <DCGLemc: NA SiQn test results: Pass

  • '*<1;'1 '*::::*,,,. 1*. ;Flriafstatµ$,:W.* : **' **p'f* .* *** ..

.. 1~}.* ****~.:":: ~~~bmmeril~1:;: **:~:r~~~/**'.":;it The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

4 FSS Main Sump revl F8300103

FINAL STATUS SURVEY F8300103 ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 3 survey based on the results of the investigation survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F83001043 meets the release criteria of 10CFR20.1402.

5 FSS Main Sump revl F8300103

Attachment 1 Maps January 30, 2017 Survey Unit F8300103

$F8300103X00010 f3 =1,583 dpm/100 cm2 South Lower Su np $ F8300103XOO 11 f3 =1,879 dp 00 cm2 F8300103X00008

$ f3 =1 ,629 dpm/100 cm2 F8300103X00006

$ f3 =1 ,848 dpm/100 cm2 F8300103X00013

$13 =2,182 dpm/100 cm2 F8300103X00012

- $13 =1 ,667 dpm/100 cm"

(;

F8300103X00003 f3 =2,364 dpm/100 cm2

$ F8300103X00014 f3 =2,227 dpm/100 cm2 Floor Lower Sump ) F8300103XOO 7 Ceihng LoxNer Surnp l '

) $ f3 =1,970 dpm/1 O cm2

$F8300103X00015 f3 =1 ,773 dpm/100 cm*

$ F8300103X00002 f3 =2,288 dpm/100 cm2 F8300103X00005 2

$13= 1,n3dpm/100c F8300103X00009

=1 ,841 dpm/100 cm" North Lower Sump F8300103X00004 SMUD Wl TIDEWATER IMC OCOO::llS I tC'lf.ntsJS I ,.UM MJ.Ul:(JJJ 13=1 ,561 dpm/100cm2 SMUD ApproYed by.

Appro\'OI d.o t<<

eun011 Rev No..:

Page 1 Att. 1 Maps revl F8300103

F8300103X00027 13 =1 ,727 dprnl100 cm* outh Uppe

~

$ F8300103X00025 F8300103X00028 ~

13 =1 ,871 dprn1100 cm' 13 =1 ,689 dpm/100 cm' F8300103X00020 $ F8300103X00030 ~ F8300103X00029 13 =1 ,576 dpmt100 cm* 13 =2,311 dpm/100 cm" 13 =1 ,909 dprn1100 cm" F8300103X00016 ~

F8300103X00017 F8300103X00022 13 =1 ,886 dpm/100 cm" 13 =1 ,955 dpm/100 cm" 13 =1 ,629 dpm/100 cm*

$ ~

F8300103X00018 $

13 =1 ,932 dprnl100 cm" Floor Upper West Uppe Ceiling Upper East Uppe

$ ~8300103X00026 F8300103X00021 13 =1 ,735 dpm/100 cm2 13 =1 ,955 dpm/100 cm' F8300103X00019 13 =2,242 dpm/100 cm' F8300103X00023 ~

13 =1 ,833 dprn1100 cm" North Upper SMUDI Iii.a TIDEWATER l~C $

{fl911l.Ul~ISCP.!llTl$l$1~Ml.Ul;(lt$

F8300103X00024 SUMP*UPPEB 13 =1 ,576 dpm/100 cm*

-roct~J09.

SMUD location: IRi.a1K:h<l s~o Took: ApproY1!d by.

Ora.tog No.: ScHW OeSC<iption:

Orown a *.

OC'd:

Oatr. ApproYal date:

Rev No.:

Page 2 Att. 1 Maps rev 1 F8300103

North Lower Su np

a. a.

E E

'.'j

(/)

© Floor Lower Sump 5

$ F8300103X00001 (3 =2,326 dpm/100 cm' South Lower Sump Page 3 Att. 1 Maps rev 1 F8300103

Attachment 2 Instrumentation December 12, 2016 Survey Unit F8300103

Table 2-1. Survey Unit Instrumentation Beta Static Ludlum Model Beta - 447 dpm/l 00 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Beta Static Ludlum Model Beta - 504 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Swipe Ludlum Model 2929 Beta - 74 dpm/100 cm2 42.8% 166716/170380 Measurements Ludlum Model 44- 11/3/16 10-1 Swipe Ludlum Model 2929 Beta-79 dpm/100 cm2 42.8% 166716/170380 Measurements Ludlum Model 44- 11/3/16 10-1

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300103

Static Measurement MDA

~c=r:§~tiftl survey Type PR331972 Detector Number

ts7 ; Background count rate (cpm)
  • I

'"* :1 Count Time (min)

~
*1'34. I Efficiency

, , .J:. ;'.'. '.1Q<LJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2)

Static MDA Page 2 Att. 2 Instrumentation rev 1 F8300103

~1'Z":=:~~=~~i~~'.1, Survey Type PR331972 Detector Number Background count rate (cpm)

Count Time (min)

Efficiency

,,,,;..,,",LL,,_,*,~ ...,,.,, Area of Detector (cm 2

,** )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page 3 Att. 2 Instrumentation revl F8300103

Attachment 3 Investigation January 30, 2017 Survey Unit F8300103 (none required)

Att. 3 Investigation rev 1 F8300103

Attachment 4 Data Assessment February 2, 2017 Survey Unit F8300103

Activity Histogram for Beta Static Activity (dpm/100 cm2) Sumps Number of Values 30 Minimum 1,560.61 Ma*imum 2.363.64 SD 249.26 Skewness 0.56 Kurtosis *0.78

~Mean 1.891.16

~Median 1,859.85

~ Normal Distribution D Less Bins 4 DMoreBins 2

1 0

1606 1686 1767 1847 1927

  • 2008 0

2088 2168 2248 2329 Page 1 Att. 4 Data Assessment rev 1 F8300103

Q-Q Plot for Beta Static Activity (dpm/100 cm2) Sumps Activ~

N *30 Mean= 1891

  • Sd *249.3
  • Slope = 246.8 Inte1cept
  • 1891
  • Conelation. A = 0.963 2200 . '
  • *8estnLine i

~* R* *

  • OH  !

1800 1600 *~-

-1 .8 -1.2 -0.6 0.0 0.6 1.2 1.8 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300103

s.mear:..Data_Calt;uiati,on..:.S~eet;_,10:l3i6 LCl tC2 .* LC3:. LC4 LC6 LC5 .

  • pcPM pdpm Date/Time of.:Ount . Saf!lple comments 1 1'830 ..()1.Q'.. 3
  • c OOOOl S.M Lovrer~Surop  : ;47' ,

l.iidlum29291fontljtop*lniitrument

  • .~

<iflld*n<Y .bks : ~-0unt:

11-----,...,...-----....:...,--.....,....--------"'i*I29295/N: 182597 rate* :*u..,;~*: Ml1A  :

.0.434 /i~j)  :<1 .. 78;7

. cpni . .: mln : * .dpm per ~rea

  • Page 3 Att. 4 Data Assessment revl F8300103

Copy of Smear_Data_Caku!ation_Sheet12517jr.xlsx IOSB Fiital_St;'ltus Sufvey .

LCl LC2 lC3 L -- *- PCPM f}dpm Date/Time of Count sample Comments 16 F83Q 010 3 c 00016 SM Sumps 43 -1 12/05/16 1045 17 ~s3o 010 3 c 00017 SM' SumpS 41 -6 12/05/16 1046 18 F830 010 3 c Ooo1ii SM Sumps 45 4 12/05/16 1047 19 f830 oio 3 (: ()(}()19 SM Sumps 31 -29 12105/16 1049 2!-> 1'!>30 010 3 c ooozo SM Sumps 37 -15 12/05/16 1050 21 f830 010 3 c 00021 SM Sumps 46' 6 12/05/16 1051

. 22 F83o. 010 .3 c 00022 SM Su.mps 44.: . 1 12/05/16 1053 23 F8~0 010 3 c 0002~ SM sumps . 50.** 15 12/05/16 1054 24 f83!i .Orn 3

" (}()()i4 SM Sumps 42. *... *3 12/05/16 1055 25 F830 oio 3 c 00025 SM Sumps 41 -6 12/05/16 1057 26 F&30 01(1 3 c 00026, SM Sump.; 4o*, .g 12/05/i6 1053

. 27 f830 O!O 3 c oaoi7 SM Sumps *'.. :39* '. *10 12/05/16 1059 28 F830 010 3 c 0()()28 SM Sumps 35 .. -19 12/05/16 1100 29 fi!30 010 3 c 00029 SM Sumps AS 11 /16 1102 30 F830 ()10 3 c 00030 SM Sumps c/14 .  : 1 12/05/16 1103 Comments By signature below, the required source <h<?ck and background checks*wcre satisfactorily performed prior to use of the-Instrument ld~11tificd below.

Ludlum 2929 Benchtop Instrument b"I; eff*.kO<) hkg tc=unt 2929 S/N: 182597 tate l11~ MO,\

3* 1 25.1

('J, 0.364 43-10-1 S/N: 188736 cpm min dpmiwH:JfC<l Tech ASign/ Date IL ?'l.-?nil I r:i.-5*/6 43.4

.:1 .. 73.6

/Date f .OIL

-al Due Date: 5/13/2017 B 0.4.34 cpm

  • ,~

min dpmper.arc*.a Pagelof1 Page4 Att. 4 Data Assessment revl F8300103

FINAL STATUS SURVEY F8300111 Rancho Seco Final Status Survey Summary Report February 3, 2017 IOSB Hot Cell Pipe rev1 Survey Unit F8300111 Prepared By:. ___

cL_._"'.;+~-JGI\

_+-4f.-l'\. /_

1

_*_ _ _ Date: 4-13-2017 FSS Engineer Reviewed By: _ _ ~~- Date:_4_-_1_3-_2_01_1_

Lead FSS Engineer Approved By: LJ¢:>.~~ Date: 4{1<t{t1-Manager, Rancho Seco Assets 1 FSS Hot Cell Drain Pipe revl F8300111

FINAL STATUS SURVEYF8300111 Survey Unit:

F8300111, Interim Onsite Storage Building (IOSB) Hot Cell Drain Pipe Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the hot cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items. Indications of a spill near the hot cell drain were found during the scoping surveys.*

Site Characterization: Gamma static measurements were collected approximately every six inches through the various runs of embedded piping (EP) using a pipe detector. Beta static measurements were also collected in the drain trenches in each storage cell, the Truck Bay, and in the DAW Bay. The highest measurement obtained in the EP was collected near the middle of the vertical hot cell drain line at 26, 7 66 dpm. Static measurements in the Hot Cell drain exceeded the grouting action level of 21,000 dpm but did not exceed the DCGL of 100,000 dpm in the vertical run of EP from the hot cell floor to the 90° connection elbow leading to the sump. The drain piping in the Hot Cell was designated as a Class 1 survey unit to distinguish this section of pipe from the remainder of the embedded piping.

Remediation in the form of mechanical decontamination reduced the level of residual contamination below the grouting limit for the vertical run of EP in the Hot Cell Drain (F8300111) and is the subject of this report.

The remainder of the EP was designated as IOSB Embedded Piping Class 3 (F8300123) and is the subject of a separate report.

Survey Unit Design Information:

Static measurement locations were collected approximately every six inches of accessible piping as specified in the License Termination Plan. Scanning of the length of piping was not conducted due to the number of static measurements collected. Following the scoping survey, decontamination was performed in the vertical section of pipe leading from the hot cell to the 90° elbow, a distance of approximately four feet.

A total of 10 static measurements were collected in a total of 5 .5 linear feet of the hot cell vertical section of embedded piping. Data collected was compared directly to the DCGL for embedded piping of 100,000 dpm/100 cm2 . The instrumentation used for the survey along with the MDC values are listed in Table 2-1 Attachment 2.

2 FSS Hot Cell Drain Pipe revl F8300111

FINAL STATUS SURVEY F8300111 Survey Results:

A total oflO direct measurements were made inF8300111 for the final status survey. Table 1 provides a listing of the direct measurement results. A statistical summary of the results of the static measurements are summarized in Table 2. All of the static measurements were less than the DCGL of 100,000 dpm/100 cm2 . None of the scan measurements indicated areas of elevated activity or required grouting of the piping (>21,000 dpm/100 cm2).

Table 1, Gamma Static Measurements

.... NGnibet ...... ,l ** ,>.:sa~pl~~*.:;::*.:.* ,~* : :>.*1:;* .Beta.~?.~T~*;:**:*:*t. ,<~' :B~~~(~g~r* . :1:,

1 F8300011M00001 10,897 13,776 2 F8300011 M00002 12,497 15, 798 3 F8300011 M00003 12,524 15,833 4 F8300011 M00004 12,790 16,169 5 F8300011 M00005 12,414 15,694 6 F8300011 M00006 12,497 15,798 7 F8300011 M00007 12,875 16,276 8 F8300011 M00008 12,378 15,648 9 F8300011 M00009 13,224 16,718 10 F8300011M00010 11,844 14,973 Table 2, Static Measurement Results Gamma Static Hot Cell Drain Pipe Mean 15,669 Median 15,799 Standard Deviation 806 Minimum 13,776 Maximum 16,718 Count 10 Survey Unit Data Assessment:

The survey design was based upon guidance in the RSLTP and resulted in 10 static measurements. Following the guidance in the RSLTP, these values are compared directly to the DCGL of 100,000 dpm/100 cm2 .

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

3 FSS Hot Cell Drain Pipe revl F8300111

FINAL STATUS SURVEY F8300111 ALARA Statement:

Residual radioactivity following remediation is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 o~ the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed in accordance with the RSL TP. The section of pipe was designated as a Class 1 survey area to distinguish it from the other embedded pipe as scoping measurements exceed the grout action level of 21,000 dpm/100 cm2

  • No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 1 survey based on the results of the scoping survey and the need to perform remediation. The sample density as specified in the RSL TP for embedded piping was met. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F830011 lmeets the release criteria of 10CFR20.1402.

4 FSS Hot Cell Drain Pipe revl F8300111

Attachment 1 Maps February 9, 2017 Survey Unit F8300111

OlllMOOlO 14,97~ Cfam 0111M0009 16,718 dpm 0111MQ008. 15,648 dpm 0111M0007 .. 16,276 dpiq.

0111M0006 15,798 dp*m OlllMOOO& 15~694 dpm

  • 0111M0004 16,169 dpm OlllM0003 15,833 dp,m/

l5,Z98' dpm:

13,776dpm Page 1 Att. 1 Maps rev 1 8300111

Attachment 2 Instrumentation February 6, 2017 Survey Unit F8300111

Table 2-1. Survey Unit Instrumentation L , ,, ,_.,

(.>Measurement Minimum Det~c,!~bl~l\divltya_. * ***** Dete~~or *. .*.* ... (::alibtatfo~;,

r Type E{fiden¢!es . : ; . Due Da,te" ;* *l Gamma Static Ludlum Model 398 dpm/100 cm2 0.791% 203481/201151 Measurement 2350-1 4/15/17 Ludlum Model 44-157 Detector

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300111

Static Measurement MDA

[~Gami!ljJ survey Type 201151 Detector Number

[ ***- 450-o:j Background count rate (cpm) bz:,, .~ l Count Time (min)

>0.791 I Efficiency

~~-]StQ~Li Area of Detector (cm 2)

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm2)

.....-.******~*""-""~***~*'""":"~'**~)

Static MDA . ... ti@.lt~ dpm/100 cm 2 Page2 Att. 2 Instrumentation revl F8300111

Attachment 3 Investigation February 6, 2017 Survey Unit F8300111 (none required)

Att. 3 Investigation revl F8300111

Attachment 4 Data Assessment February 9, 2017 Survey Unit F8300111

Histogram for Gamma Scan Activity (dpm) Hot Cell Drain Pipe

.n *nn ** * "*"

r:=.~=--- ,J 13.776.23J M....... 1s.na.oai so ~* Ji S k~I *1.48~

Kutosit 11'1

[iilM~ 15.668.ni (iilM..W 15.~.99!

8 Normal Oilbhiion  !

S LessBN 0Mae8iis 1'709 15129 15550 15970 16Dl Page 1 Att. 4 Data Assessment rev 1 F8300111

Q-Q Plot for Gamma Static Activity (dprn) Hot Cell Drain Pipe Actmtrl"""

........ / .. N *10 Mean* 15669 Sd *to;. 1 Slooe*7a5.1 lnl*cept* 15669 16500 Coo""on.R *QS16 16IXIJ 15500 E'

a.

~

~

"'21,000 dpm).

Table 1, Static Measurement Results

r : . .  :. .. * *Length of  ;::>::+:*.... *... * ........>i,,<'*.; i .*'

1: . $e~tion.pf  : '., Numoer.of .: .

.Pipe'Run.

. :fjll11}ed()edPipillg

  • Measurenients I I*.*::*.;;*.*.*.  ::  :,: .* : * .* * .. * *;:* * *.. i .. (feet) < . . ,; *..<:*;;:... .. i /*;. *:. ,,  ;.

DAW Bay to Sump 86 154 4,090- 7,168 DAW Staging Bay 40 87 3,819 - 12,437 to DAW line Cell C-1 to Sump 6 11 6,195 - 6,915 Truck Bay Trench 28 61 5,764- 6,657 to Truck Bay Sump Truck Bay Sump to 16 34 1,100-1,659 Sump 4 inch Truck Bay Sump to 23 47 5,935 - 9,376 Sump 6 inch Cask Wash Down to 20 40 3,620 - 5,518 Sump Expansion line from 36 70 4,880 - 6,700 Sump Table 2 contains the statistical summary of the static measurement data for the Embedded Piping.

Table 2, Gamma Summary Statistics Embedded Piping Mean 5,038 Median 5,097 Standard Deviation 1,355 Minimum 1,100 Maximum 12,437 Count 504 FSS Embedded Pipe revl F8300123

FINAL STATUS SURVEY F8300123 Survey Unit Data Assessment:

The survey design required a static measurement every six inches of accessible piping.

Based upon the estimated length of piping and the number of measurements collected, the FSS resulted in a measurement roughly every 6.07 inches. All measurements were less than the DCGL.

Survey Unit Investigations and Results:

No investigations were required for the direct measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designated as a Class 3 survey area and surveyed in accordance with the RSLTP for embedded pipe. Measurements were collected every 6.07 inches on average per the RSL TP. However this did not affect the survey effectiveness as no potential areas of elevated activity were detected.

Conclusion:

The FSS of this survey unit was properly designed as a Class 3 survey based on the results of the scoping survey. The required number of direct measurements made met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300123 meets the release criteria of 10CFR20.1402.

3 FSS Embedded Pipe revl F8300123

Attachment 1 Maps February 9, 2017 Survey Unit F8300123

MECH.AN I CAL/

,ECTRICAL RCXJYI R TR[k;.K f' Y Truck Bay 19...00R SL.MP-....._,__

Expansion Line DRAit/

HOf GELL E-t= - -

  • TRLJC-K RAMP STAGING IN TRENC-H DRY n:..y_

IN PIPE AC ------- IVATED L~IN WASTE BAY TIDEWATER IN R AOIOl_,O(;.fCA I.. $F:RVICFJJ 0 10 20 ~o 10

!'JOJie 1n feet Rev No.: & ~ lndi .. 10 11.

Page 1 Att. 1 Maps rev 1 8300123

Attachment 2 Instrumentation January 25, 2017 Survey Unit F8300123

Table 2-1. Survey Unit Instrumentation t :Measurement * * *. * ********* **** . * *. '.\VJip_imtiniI>L~tectable .f\ctivity~* ' ... <Detector*

  • n Calibration ...

. . . j'y:pe *. * ;. *.insirumentType .~ . Efficien~ies**: ))lie Dateb :.. :l Gamma Static Ludlum Model 398 dpm/100 cm2 0.791% 203481/201151 Measurement 2350-1 4/15/17 4 inch pipe Ludlum Model 44-157 Detector Gamma Static Ludlum Model 24 7 dpm/100 cm2 0.511% 203482/010057 Measurement 2350-1 6/30/17 6 inch pipe Ludlum Model 44-159 Detector

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300123

Static Measurement MDA EC.Ci~i:nhiiLJ Survey Type 201151 Detector Number

\~:}~-45po Background count rate (cpm) t* w * :;\1 Count Time (min)

. 0.7$tJ Efficiency JO.Qj Area of Detector (cm 2)

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2)

Static MDA dpm/100 cm2 Page2 Att. 2 Instrumentation revl F8300123

[J~~fijffi:~] survey Type 10057 Detector Number ri-~?ool Background count rate (cpm)

. . . . '"t.1';1 Count Time (min) 1 :*o.51} I Efficiency f . . .~: **~ .. ' >~<' .i r:;:;_::~J'().<LJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page 3 Att. 2 Instrumentation rev 1 F8300123

- _J

Attachment 3 Investigation January 25, 2017 Survey Unit F8300123 (none required)

Art. 3 Investigation revl F8300123

Attachment 4 Data Assessment January 25, 2017 Survey Unit F8300123

              • -*-*****--**** *********1 m:!

Histogram for Gamm Static Activity (dpm) Embedded Pipe activ*

Nl.mbe<dV.U..

Mnn..n 1.099110j 19l M......, 121.381.71

.m.*21 SD Skewness -0.81 ;

180 Ku1osis l U!

(;l M0<<1 s.057.ss!

17tl (;l MO<ion 5.151 .071

(;lNO<mOlDObh.tion I

I 160 OltuBN 150 O Mae BN I

14-0 131 120 110 llO 60 50 2D 10

___ I 10204 11338 12cn

_\

Page 1 Att. 4 Data Assessment rev 1 F8300123

eel~

Q-Q Plot for Gamma Static Activity (dpm) Embedded Pipe N *476 Mean*~

Sd*1382 Slcoe

  • 1254 lril!llcept*5058 Conelation.R *O.SJ.i HXOO
  • 3 *2 0 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300123

Rancho Seco Final Status Survey Summary Report January 30, 2017 IOSB Outside Area Class 1 rev1 Survey Unit F8300141 FSS Engineer Reviewed By: _ _ ~-- Date: 4-13-2017 Lead FSS Engineer Approved By: ~kv- Date:

I Manager, Rancho Seco Assets

FINAL STATUS SURVEY F8300141 Survey Unit:

F8300141, Interim Onsite Storage Building (IOSB) Outside Area Class 1 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the IOSB possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items. The outside asphalt area at times held waste ready to ship in storage containers and a respiratory cleaning facility.

Site Characterization: Scanning of the outside asphalt area identified an elevated area requiring remediation adjacent to the IOSB. Certain spots in the area exceeded the DCGLw but not the DCGLEMC* The Outside area was divided into a small Class 1 Survey Unit, buffered by a Class 2 Survey Unit. The remaining environmental areas, Outside Area Class 3 (F8300143) Survey Unit is the subject of a separate report. The Outside Area Class 1 (F8300141) requiring remediation had a maximum static value of approximately 242,497 dpm/100 cm2 . The Outside Area Class 1 (F8300141) is the subject of this report.

The Outside Area Class 2 (F8300142) and Class 3 (F8300143) are the subject of separate reports.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than 10 m2 or land areas less than 100 m 2 . In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these smaller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than one square meter (0.37 m2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were based upon professional judgment in accordance with MARSSIM guidance and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1Attachment2.

1 FSS Outside Area Class 1 revl F8300141

FINAL STATUS SURVEY F8300141 Table 1, Survey Unit Design Parameters

.... **\;::~c\:* ** .'f*ev:a1u~\iC::niJni5ut .V~l"l.$11tritt~~~~~t*.~ ** *.*. *'. *.'t~t;t~::.~: *~<~*(*'<#~mfil~ll~w:*. .*ii;~ >kl;: <t!tl.:

Survey Packaqe: F830 Outside Asphalt Class 1 Survey Unit: 014 Class 1 SU Area (m 2 ) 0.37 0.37 mz Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor 22.1 DTBD-05-003 Desiqn DCGLemc (dpm/100cm 2 ): 950,300 DCGLemc: 950,300 LBGR: 21,500 Default =50% DCGL Siqma: 513 Generic Siqma Type I error: . 0.05.

Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m 2 ) N/A Total Instrument Efficiency: 0.130 Total Area Scanned (m 2 ): 0.37 Scan Coverage(%) **** * ]60% Class 1 Choosing 'N/A' sets material Material Type: N/A background to "O" Z1-a: *. 1.645 Z1-s: 1,645 Siqn p: 0.99865 Calculated Relative Shift: **** 4.1.9 Relative Shift Used: . . * ...... 3.o Uses 3.0 if Relative Shift >3 Values selected based upon N-Value: ,5 Judqement N-Value+20%: NIA Survey Results:

A total of 5 direct measurements were made in F8300141. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity.

2 FSS Outside Area Class 1 revl F8300141

FINAL STATUS SURVEY F8300141 Table 2, Static Measurement Results I .. . .. .

  • ~~t~F(~pm):*:;.:. 'f:*J;,::. .* B~ta*(apm)!;, * ::,,
    • . :* ..*.. :.1.: ... :>:.: . . ,*. :;

1 F8300141A00001 370 2,803 2 F8300141A00002 353 2,674 3 F8300141A00003 313 2,371 4 F8300141A00004 347 2,629 5 F8300141A00005 350 2,652 Table 3 contains the statistical summary of the static measurement data for the Outside Area Class 1.

Table 3, Beta Summary Statistics Beta Static Outside Asphalt Class 1 Mean 2,626 Median 2,652 Standard Deviation 158 Minimum 2,371 Maximum 2,803 Count 5 Survey Unit Data Assessment:

The survey design was based upon professional judgement and resulted in 5 static measurements. Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS Outside Area Class 1 revl F8300141

FINAL STATUS SURVEY F8300141 Table 4, Data Assessment Results Median: :2;652 Mean: 2,626 Static Data Standard Deviation: *.*.*..158 Maximum: 2,803 Maximum value <DCGLw: Pass Median value <DCGLw:

  • Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: * ,N/A Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements collected for the FSS and no investigation results are reported.

ALARA Statement:

Residual radioactivity following remediation is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the L TP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 1 survey and the sample results are consistent with that classification. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 1 survey based on the results of the investigation survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300141 meets the release criteria of 10CFR20.1402.

4 FSS Outside Area Class 1 revl F8300141

Attachment 1 Maps January 30, 2017 Survey Unit F8300141

Jo 0.25 0.5 o.75ft r n F8300141A00003

[3 =2,371 dpm/100 cm 2 F8300141A00005 F8300141A00002 [3 =2,652 dpm/100 cm 2 f3 =2,674 dpm/100 cm 2 F8300141A00004 P = 2,629 dpm/100 cm 2 F8300141A00001

[3 =2,803 dpm/100 cm 2 N

N TIDEWATER IN SMU D 0

App*o'"'d by.

0 1 2 2 3 3 4 4 5 5 6 6 7 Approwl dote:

Rev No.:

Page 1 Att. 1 Maps rev 1 F8300141

Attachment 2 Instrumentation January 30, 2017 Survey Unit F83000141

Table 2-1. Survey Unit Instrumentation i ,Measurement'* * ** * * / * * . * * *'

  • MiniD1U!Jl ~etectableActi:vi,!Y~: Detector Calibratiott' . ;

if' 0

    • TYP.e L: ;_,
  • **,
  • Instrumen(fype '<~rt ,

>: E.fficienc.i.e.s.': Due...;..*n**

  • ,,,fr. ...

.. *. ateli. <1' Beta Static Ludlum Model Beta - 515 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2110117 Ludlum Model 44-116 B Detector a Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Att. 2 Instrumentation revl F8300141

Static Measurement MDA F**:__ r"=}3:§t.ir! Survey Type PR331972 Detector Number

  • T-*;19&'"j Background count rate (cpm)
  • .*.* 1: ; Count Time (min)
  • 0.13ij Efficiency
  • --*""'*.:__JQQJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page2 Att. 2 Instrumentation revl F8300141

Attachment 3 Investigation January 30, 2017 Survey Unit F8300141 (none)

Att. 3 Investigation revl F8300141

Attachment 4 Data Assessment January 25, 2017 Survey Unit F8300141

Histogram for Beta Static Activity (dpm/100 cm2) Outside Area Class 1 Acliv-Nwnbet olValJet MNiun 2.371.21 M..m.n 2.003.03 so 157.51 Skewneu *1.15

! K1.rtosis 2.54

(>'l Moan 2.625.76 0 M"""' 2.651.52

~ Nounal DistrbAion O LeuBini

\ 0MOfeBm 2375 2418 2461 2505 2591 2807 Page 1 Art. 4 Data Assessment rev 1 F8300141

Q-Q Plot for Beta Static Activity (dpm/100 cm2) Outside Area Class 1 Acti..,

N* 5 M"""

  • 2626 Sd* 157.5 Slope
  • 162.3 lnle<cepl
  • 2626 2760 Cooelatoo, A
  • O.S33 2700 2640

... - ** ~ *

/  :

~. . .

2460 2400

  • 1.2 *O.S -0.6 ~ M U o.s 1.2 The oretlcal Quantiles (Stan dard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300141

Rancho Seco Final Status Survey Summary Report January 30, 2017 IOSB Outside Area Class 2 rev1 Survey Unit F8300142

'\

Prepared By: ___

c: G1 C__;;;,__+1----"'1-r____ Date: 4-13-2017 FSS Engineer Reviewed By: _ _ ~,~-- Date: 4-13-2017 Lead FSS -Engineer Approved By: ./J!t>_ ~a-- Date:

Manage:Raneho Seco Assets

FINAL STATUS SURVEY F8300142 Survey Unit:

F8300142, Interim Onsite Storage Building (IOSB) Outside Area Class 2 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), the IOSB possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items. The outside asphalt area at times held waste ready to ship in storage containers and a respiratory cleaning facility.

Site Characterization: Scanning of the outside asphalt area identified an elevated area requiring remediation adjacent to the IOSB. Certain spots in the area exceeded the DCGLw but not the DCGLEMc. The outside area was divided into a small Outside Area Class 1 (F8300141) Survey Unit, buffered by a Class 2 (F8300142) Survey Unit. The remainder of the outside area was designated as Outside Area Class 3 (F8300143) Survey Unit. The Class 1 (F8300141) area requiring remediation had a maximum static value of approximately 242,497 dpm/100 cm2 .

The Outside area Class 2 (F8300142) is the subject of this report and the Outside Area Class 1 (F8300141) and Class 3 (F8300143) are separate reports.

Survey Unit Design Information:

In accordance with MARSSIM Section 4.6, special considerations may be necessary for survey units with structure surface areas less than 10 m2 or land areas less than 100 m2 . In this case, the number of data points obtained from the statistical tests is unnecessarily large and not appropriate for smaller survey unit areas. The data generated from these smaller survey units should be obtained based on judgment, rather than on systematic or random design, and compared individually to the DCGLs. This survey unit meets this criterion as the size is less than ten square meters (1.85 m 2).

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were determined by professional judgment in accordance with MARSSIM guidance and approximately 100% of the area scanned. The instrumentation used for the survey along with the MDC values are listed in Table 2-1Attachment2.

1 FSS Outside Area Class 2 revl F8300142

FINAL STATUS SURVEY F8300142 Table 1, Survey Unit Design Parameters Survey Packaqe: F830 Outside Asphalt Class 2 Survey Unit: 014 Class 2 SU Area (m 2) 1.85 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor NA Class 2 Design DCGLemc (dpm/100cm 2 ): NA Class 2 DCGLemc: NA Class 2 LBGR: 21,500 Default= 50% DCGL Sigma: 513 Type I error: , * *. 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.132 Total Area Scanned (m 2): 1.85 Scan Coverage(%) '""' 100%/ Class 2 Choosing 'N/A' sets material Material Type: N/A background to "O"

'* <,101.~; :, ! >:*7 ;~r}'r' . .(:;~<(1.c:;u1~'iett;~a.1ues':i1J1&' 1 ~c~~~tii, .>  :"* * ,,~ *. L' *.*.. ~.*~i'*'~iit~:: ~omm:flnts{ .,:.~;::.~~'*';~*.;k4, Z1-a: *. :- 1.645 Z1-~: . 1.645 Siqn p: 0.99865 Calculated Relative Shift: >

  • 41 .9 Relative Shift Used: 3.0' Uses 3.0 if Relative Shift >3 Values selected based upon N-Value:
  • 10 Judqement Values selected based upon N-Value+20%: Judqement Survey Results:

A total of 10 direct measurements were made in F8300142. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity.

2 FSS Outside Area Class 2 revl F8300142

FINAL STATUS SURVEY F8300142 Table 2, Static Measurement Results F8300142AOOOO 1 266 2,015 2 F8300142A00002 316 2,394 3 F8300142A00003 345 2,614 4 F8300142A00004 340 2,576 5 F8300142A00005 320 2,424 6 F8300142A00006 373 2,826 7 F8300142A00007 350 2,652 8 F8300142A00008 369 2,795 9 F8300142A00009 373 2,826 10 F8300142A00010 343 2,598 Table 3 contains the statistical summary of the static measurement data for the Outside Area Class 2.

Table 3, Beta Summary Statistics Beta Static Outside Asphalt Class 2 Mean 2,572 Median 2,606 Standard Deviation 247 Minimum 2,015 Maximum 2,826 Count 10 Survey Unit Data Assessment:

The survey design was based upon professional judgement and resulted in 10 static measurements. Following the guidance in MARSSIM Section 4.6, these values are compared directly to the DCGLw.

The comparison and the results are presented in Table 4. The sample mean and median values were less than the DCGL.

3 FSS Outside Area Class 2 revl F8300142

FINAL STATUS SURVEY F8300142 Table 4, Data Assessment Results

.,  :}~* 1 \,* i ,,.::r,.. *. '.*~fatiG*tmafa va19'ts\~~t1!~Ls :> ,:*~ ~\; i~~l;:,~i~* fl~ : ,c()inmefo~~ >\:;: '"1"~* "+'

Number of Samples: .,10 Median: 2;60(3 Mean: 2,572 .*

Static Data Standard Deviation: 247 Maximum: 2;826 Adjusted N Value: *.* 10 S+ Value: .. 10 Critical Value: .... NA

&<:*:~~ , . . 11 :.'.'~i~%"';ctit~d'i 1s~ti~d~clil>n)f~*'>~'"\~i*:**;~*;: :l~~ ~1 ..:irs\~.y~.~,~\~.\~\*C~ffiments'ft{~,s~0.. <l*:*: '

Sufficient samples collected: Pass Maximum value <DCGLw: Hass Median value <DCGLw:

  • Pass Mean value <DCGLw: . . Pass Maximum value <DCGLemc: *** * '.NJ(

Siqn test results: ** NA

  • t.~¥* *ti:::.:*:; * ::;;~t:;:;JFinar'iSiatusi!t~~*~
  • _: ..... *.*; ~~i'.yx*: .'<\:;,: ::\:i;~'fmm~fit~f1~'11 *;:0*~:i1*: *1~~¥ The survey unit passes all conditions: *. Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 2 survey and the sample results are consistent with that classification. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 2 survey based on the results of the scoping survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300142 meets the release criteria of 10CFR20.1402.

4 FSS Outside Area Class 2 revl F8300142

Attachment 1 Maps January 30, 2017 Survey Unit F8300142

N LO Io 0.25 0.5 0.75 ft rn F8300142A00006 P= 2,826 dpm/100 am 2 F8300142A00003 P= 2,614 dpm/100 cm 2 F8300141 F8300142A00008 P=2,795 dpm/100 cm 2 F8300142A00010 lI ~F8300142A00005

=

~p 2,424 dpm/100 cm' P= 2,598 dpm/100 cm 2 F8300142A00002 P=2,394 dpm/100 cm 2 ~

F8300142A00004 P=2,576 dpm/100 cm 2 F8300142A00009 F8300142A00007 P= 2,826 dpm/100 cm 2 P=2,652 dpm/100 cm 2 ...-

F8300142A00001 F8300142 P =2,015 dpm/100 cm 2 ~

TIDEWATER INC 0 RADIOLOGICAL SERVICES Outside Area Class 2 Contract No.: 4500091426 SMUD 0 1 1 2 2 3 4 4 5 5 6 6 7 Location: Rancho Seco Approved by.

3 Task: Final Statu s Sur ve Drawing No.: NA Desc.-iptlon:

Drown B .

QC'd :

Appro\.'Ol date:

Date:

Rev No.:

Page 1 Att. 1 Maps revl F8300142

Attachment 2 Instrumentation January 30, 2017 Survey Unit F83000142

Table 2-1. Survey Unit Instrumentation Beta Static Ludlum Model Beta - 522 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Art. 2 Instrumentation revl F8300142

Static Measurement MDA B;~L=~@it~J Survey Type PR331972 ..

n;;>.'l:",'>~' <.*~~:vv,,w: *"".'"~

Detector Number I.*; . , . .

201,.l. ;)

Background count rate (cpm)

'* * *** .J?'l Count Time (min) 132:: Efficiency

"'***"~*'**""'"'"1_,,:6,.:,,::..;" Area of Detector (cm 2

)

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t} 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page2 Att. 2 Instrumentation revl F8300142

Attachment 3 Investigation January 30, 2017 Survey Unit F8300142 (none)

Att. 3 Investigation revl F8300142

Attachment 4 Data Assessment January 30, 2017 Survey Unit F8300142

Acliv_,

Histogram for Beta Static Activity (dpm/100 cm2) Outside Area Class 2 NlnberdVeLm Mirm.m 2.015. 15 M"°""" 2.825.76 so 2'7.

Skewnen *1.26 1.97

""'°'"

[!!Mean 2.571 .97 8Medon 2.S!Ji~

[!I Norlflll OiatrbJion OLntBft 0 More8iv 2675 2756 2027 2100 2189 Page 1 Att. 4 Data Assessment rev 1 F8300142

Q-Q Plot for Beta Static Activity (dpm/100cm2) Outside Area Class 2 N*lO Moan*2572 Sd*247.5 Sioo<*246.2 lnl9feepl:. 2572 ConNtion.R n936 0

2600 ns 1.0 1.5

-1.5 *1.0 -0.5 no Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300142

Rancho Seco Final Status Survey Summary Report January 30, 2017 IOSB Outside Area Class 3 rev1 Survey Unit F8300143

\~

\j FSS Engineer Reviewed By: _ _

~

/-tJ '---) --- 4-13-2017 Date: _ _ _ __

Lead FSS Engineer Approved By: LJ1o, Manager, tr.::--

Ra ChOSeCo Assets Date: 4-/,9/rt-

FINAL STATUS SURVEY F8300143 Survey Unit:

F8300143, Interim Onsite Storage Building (IOSB) Outside Area Class 3 Survey Unit

Description:

Operating History: Designed primarily to store packaged radioactive waste containers safely, protected from the elements, and maintain radiological dose as low as reasonably achievable (ALARA), each storage cell possibly stored media of many types, including filters, resins, contaminated chemicals, DAW, activated reactor components, contaminated plant components and other contaminated items.

Site Characterization: Scanning of the outside asphalt area identified an elevated area requiring remediation adjacent to the IOSB. Certain spots in the area exceeded the DCGLw but not the DCGLEMC* The Outside area was divided into a small Class 1, Outside Area Class 1 (F8300141) Survey Unit, buffered by a Class 2 (F8300142).

The Class 1 (F8300141) area requiring remediation had a maximum static value of approximately 242,497 dpm/100 cm2 . The remaining, Outside Area (F8300143) was designated as a Class 3 Survey Unit and is the subject ofthis report.

The Outside Area Class 1 (F8300141) and Class 2 (F8300142) are separate reports.

Survey Unit Design Information:

The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Static measurement locations were randomly determined and approximately 100% of the area scanned by gamma scanning. A total of 7 soil samples were collected from the berm area and analyzed by gamma spectroscopy at an offsite laboratory. The instrumentation used for the survey along with the MDC values are listed in Table 2-1Attachment2.

1 FSS Outside Area Class 3 revl F8300143

-__J

FINAL STATUS SURVEY F8300143 Table 1, Survey Unit Design Parameters Evaluation Input Values Comments Survey Packaqe: F830 Outside Survey Unit: 014 Class 3 SU Area (m 2) 5853 Evaluator: JR DCGLw: 43,000 Gross Activity DCGL Area Factor NA Class 3 Design DCGLemc (dpm/100cm 2 ) : NA Class 3 LBGR: 21 ,500 Default = 50% DCGL Sigma: 513 Scoping Survey Data Type I error: 0.05 Type II error: 0.05 Predominant Nuclide Cs-137 Sample Area (m2) N/A Total Instrument Efficiency: 0.129 Total Area Scanned (m 2): 2643 Includes gamma scan of soil and Scan Coveraqe (%) 45% asphalt Choosing 'N/A' sets material Material Type: N/A background to "O" Calculated Values Comments Z1-a: 1.645 Z1 -B: 1.645 Siqn p: 0.99865 Calculated Relative Shift: 41 .9 Relative Shift Used: 3.0 Uses 3.0 if Relative Shift >3 N-Value: 11 N-Value+20%: 14 Survey Results:

A total of 15 direct measurements were made in F8300143 on the asphalt surface. The results of the static measurements are shown in Table 2. All of the static measurements were less than the DCGL. Gamma scanning results identified an area of elevated activity. The DCGL was exceeded and was separated as a Class 1 survey area. All soil sample results did not have detectable activity. The results of the soil samples are contained in Attachment 5 (Laboratory Analysis- Gamma Spectrometry) ofthis report.

2 FSS Outside Area Class 3 revl F8300143

FINAL STATUS SURVEY F8300143 Table 2, Static Measurement Results Number Sample# Beta (cpm) Beta (dpm) 1 F8300143A00015 324 2,455 2 F8300143A00006 340 2,576 3 F8300143A00011 399 3,023 4 F8300143A00013 352 2,667 5 F8300143A00002 393 2,977 6 F8300143A00012 366 2,773 7 F8300143A00004 331 2,508 8 F8300143A00007 356 2,697 9 F8300143A00016 328 2,485 10 F8300143A00017 339 2,568 11 F8300143K00018 341 2,583 12 F8300143A00019 407 3,083 13 F8300143A00020 362 2,742 14 F8300143A00021 301 2,280 15 F8300143A00022 360 2,727 Table 3 contains the statistical summary of the static measurement data for the Outside Area Class 3.

Table 3, Beta Summary Statistics Beta Static Outside Mean 2,676 Median 2,667 Standard Deviation 223 Minimum 2,280 Maximum 3,083 Count 15 Survey Unit Data Assessment:

The survey design required 14 static measurements for the Sign Test. A total of 15 static measurements were collected. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.

3 FSS Outside Area Class 3 revl F8300143

_J

FINAL STATUS SURVEY F8300143 Table 4, Data Assessment Results Static Data Values Comments Number of Samples: 15 Median: 2,667 Mean : 2,676 Static Data Standard Deviation : 223 Maximum : 3,083 Sign Test Results Comments Adjusted N Value: 14 S+ Value: 15 Critical Value: 10 Criteria Satisfaction Comments Sufficient samples collected : Pass Maximum value <DCGLw: Pass Median value <DCGLw: Pass Mean value <DCGLw: Pass Maximum value <DCGLemc: N/A Siqn test results : Pass Final Status Comments The survey unit passes all conditions: Pass Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

The residual activity within the survey unit is less than the DCGL and meets the ALARA criterion as determined in Chapter 4 of the LTP.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 survey and the sample results are consistent with that classification. No individual measurement exceeded the DCGL. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 3 survey based on the results of the investigation survey. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the static measurements were less than the DCGL. No investigations were required.

The static measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.

It is concluded that survey unit F8300143 meets the release criteria of 10CFR20.1402.

4 FSS Outside Area Class 3 revl F8300143

Attachment 1 Maps January 30, 2017 Survey Unit F8300143

N I

F8300143S00003 *

  • F8300143S00009 F8300143S00014 s
  • F8300143S00008
  • F8300143S00001
  • F8300143K00011 J3 = 3,023 cpm
  • F8300143A00006
  • F8300143A00017 J3= 2,576 cpm J3 = 2,568 cpm F8300143A00016

.. J3 =2,485 cpm F8300143A00013 J3 =2,667 cpm 0

F8300143S00005 F8300143A00022 STAf'ILIZATION J3 =2,727 cpm F8300143A0001 0

  • J3 = 3,083 cpm
  • D D F8300143A00002 F8300143A00012 J3 = 2,977 cpm J3 = 2,773 cpm
  • AsPHALT SLRFACE F8300143A00007
  • F8300143A00020 *
  • J3 = 2,742 cpm F8300143A00021
  • J3 =2,697 cpm J3 =2,280 cpm F8300143S00010 TIDEWATER IN RADIOLOGICAL SERVICES PERIMETER FENc;.E INTERIM ONSITE STORAGE BUILDING (IOSB)

Contract No.: 4500091426 SMUD Location: Rancho Seco 1-::T:-a-:-sk-:----t-:S,-co--:-in-s=-u-rv_e_ _ __, Approved by.

Drawing No.: SS Exterior.dw

Description:

Drawn B . 0 100

~QC~'d~:- - - - + - - - - - - - - j Approval date: 5cale In feet Date: 06182015 Rev No.: 0 Page 1 Att. 1 Maps revl F8300143

Attachment 2 Instrumentation January 30, 2017 Survey Unit F8300143

Table 2-1. Survey Unit Instrumentation Beta Static Ludlum Model Beta - 477 dpm/100 cm2 13.2% 317897/331972 Measurement 2350-1 2/10/17 Ludlum Model 44-116 B Detector Gamma Scan Ludlum Model 2350 927 cpm NA 317892/208816 Ludlum Model 44- 12/29/16 10 Gamma Scan Ludlum Model 2350 945 cpm NA 317894/300786 Ludlum Model 44- 12/29/16 10

  • Minimum detectable activities for the count rate instrumentation were calculated in accordance with NUREG-1507, "Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various Contaminants and Field Conditions" (U.S. NRC, 1997).

b Detectors are required to be calibrated once every 12 months. Calibration due date indicates the date by which the detector must be calibrated again.

cm2 = square centimeters cpm = counts per minute dpm = disintegrations per minute Page 1 Art. 2 Instrumentation revl F8300143

Static Measurement MDA tT****LI~~§~ Survey Type PR331972 Detector Number r

>'<N~*'.)~':~ ,,,,,_,,,.~-" N~-~,~';"i

>'*~~~. 16(! Background count rate (cpm) i *. .* * *

  • A*1 Count Time (min)

I '** *. 0 ..132 : Efficiency lL:~~1Q<tJ Area of Detector (cm 2 )

Constants 60 sec/min 2.54 cm/in Assumptions Background count time and sample count time are equivalent Calculate Static MDA Static MDA =3 + 4.65(Br

  • t) 0 *5/t
  • E

Where: Br Background Countrate t Count Time (min)

E Efficiency A Area of detector (cm 2 )

Static MDA Page2 Att. 2 Instrumentation revl F8300143

Minimum Detectable Count Rate for Outside Scanning Variables

[ X' iB]~; Baclrground count ra!i! {cprn) 0.5 Sunre)W Efficiency (p) t38 De.iabilltypemxmani::e {d), based upon acceplable 1rue and false positives (w.RRSlM Th!e 6-5)

[~JjJJE)Detil!l!orElf;::iency Constants 60 5edmirn 254 ani'i.n mo anlm Average Scan Speed for Sll!Yey Unit

.{5]l~cmfsec A1JeraQe&anSpeedfurSl!myUnit Determine Obsemfioo lnle!val fur Scon Speed (ij E ;::Jjsec Observaiionln!enralfurscanspeal of 5.0B Calculate Net Source Col!llts in Obsew.ifion lnteval {ij SJ= d '(b;}as Eq'.raiion 6-B fromMARSSIM Where: Minimum deteclable lllllllberof net soon:e counts in !he !iliservalion inlew.il.

dele<:tlNittiy pelfullThJl1ce based on aci:eplab!e rale of irue and false positives Bacl;grnund roun!s in interval, I

' y* Z *:}:2Jqirn =S.

Calculate the MDCR llIDCR = S, x {80/l]lp~~ ~on 6-ll from MARSSIM Where: M!JCR Minimum~Ccun!Rate(qim}

I Ob56\lllfoo 11'.lerval 2.00 sec 1

Page 3 Att. 2 Instrumentation rev 1 F8300143

Minimum Detectable Count Rate for Outside Scanning Variabtes

]m9l!lackgroond coon! ra!~(cpm) 0..5 Sllflieyi}r E!ficil!llcy{pJ l~. Oeclilbillyperfo!mance {d~ lnsed upllll ~le irue and t.ilse positves (Mi\RRSJM Thie 6-5) r~-Oflilletl!ct1lf Elf;ciency Constants 60 sedmin 2.Manf;n 1ca cm1m

~~:::eedforS=~n~ Speed forS!Jnieytlnl Defemlirn! Ohsairalion lnleml for Sean Si-f iQ ki~;f~~n;sec Obseoo!ion lntenral for5C311 speed of 5.0B Calculate Net Source Coll!l!s in Obsera!ion lnleival {ij Si= d' \b;)f1! ~en Mfrom MARSSIM

.MinilllllllldeiEcl~ ll!ll!l1ber rt net~ coonl.sln !he 006avalio!l intmal di!teclab\illiy ~based on ac.:eplab!l! rale of !rue Olld false positives lliic!:Qlll'Jnd coonl.s in inierval, J

.. ' S1;~'licpm=S; ea1C111~ihe i.!Daf * ~**

M:JCR = S. x(6flll}'JfS ~ootl-'Jfrom t.!ARSSIM Wh!!!e: MDCR MinimlllllDE!eclablefu.m!Rate (cpm}

l ObsEM!foo Jr.~l 2.00 5ell

zil'i]iqim (MDC-R) l46fdj
  • fn Page4 Att. 2 Instrumentation rev 1 F8300143

Attachment 3 Investigation January 30, 2017 Survey Unit F8300143 (none)

Att. 3 Investigation rev 1 F8300143

Attachment 4 Data Assessment January 30, 2017 Survey Unit F8300143

Histogram for Beta Static Activity (dpm/100 cm2) Outside Area Activfy 4 Numbe1 of Values 15 Minimum 2.280.30 Maximum 3.083.33 SD 222.74 Skewness 0.37 Ku1losis *0.21 RI Mean 2,676.26 3 RI Median 2.666.67 RI No1mal Disl1ibution 0 Less Bins 0More8ins 0

2329 2409 2489 2570 2650 2730 2811 2891 2971 3052 Page 1 Att. 4 Data Assessment rev 1 F8300143

Q-Q Plot for Beta Static Activity (dpm/100 cm2) Outside Area Act my N

  • 15

/

  • Mean = 2676 Sd*222.7 Slope= 228.6 3000
  • lnteicept
  • 2676 Correlation. R = 0.98
  • Best Fil Line 2800 2600

.. . i . . .

-1 .5 -1.0 -0.5 o:o 0:5 1.0 1.5 Theoretical Quantiles (Standard Normal)

Page 2 Att. 4 Data Assessment rev 1 F8300143

Attachment 5 Laboratory Analysis Gamma Spectrometry Report (14 pgs)

January 30, 2017 Survey Unit F8300143

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0030 (F8300143-l) Project: SMUD00201 Sample ID: 407403001 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 13:50 Receive Date: 04-0CT-16 Collector: Client

' Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

\ctinium-228 7.lOE-07 +/-2.87E-07 2.34E-07 uCi/g l'v1XR.l 10/21/16 1428 1604416

\mericium-241 u l.92E-08 +/-l.44E-07 2.61E-07 uCi/g

\ntimony-124 u -6.20E-08 +/-7.66E-08 l.07E-07 uCi/g illtimony-125 u -2.97E-08 +/-7.58E-08 l.40E-07 uCi/g larium-133 u -3.85E-09 +/-3.53E-08 6.llE-08 uCi/g larium-140 u l.41E-07 +/-5.30E-07 l.05E-06 uCi/g leryllium-7 u l.86E-07 +/-3.78E-07 7.64E-07 uCi/g lismuth-212 9.35E-07 +/-7.38E-07 8.90E-07 uCi/g lismuth-214 6.43E-07 +/-l.98E-07 l.27E-07 uCi/g

erium-139 u 3.45E-09 +/-2.67E-08 4.89E-08 uCi/g
erium-141 u -4.19E-08 +/-8.07E-08 l.40E-07 uCi/g
erium-144 u -2.44E-08 +/-1.77E-07 3.20E-07 uCi/g
esium-134 u -4.22E-09 +/-4.52E-08 8.21E-08 uCi/g
esium-136 u -8.25E-08 +/-2.05E-07 3.80E-07 uCi/g

~esium-137 u 9.37E-09 +/-3.81E-08 7.56E-08 1.00E-07 uCi/g

hromium-51 u -2.32E-07 +/-4.45E-07 8.18E-07 uCi/g
obalt-56 u 6.78E-09 +/-3.99E-08 8.25E-08 uCi/g
obalt-57 u -2.22E-08 +/-2.30E-08 3.83E-08 uCi/g

~obalt-58 u -l.69E-08 +/-3.43E-08 6.48E-08 uCi/g

obalt-60 u 9.67E-09 +/-2.89E-08 6.54E-08 l.OOE-07 uCi/g luropium-152 u -l.59E-08 +/-9.48E-08 l.77E-07 uCi/g luropium-154 u 2.22E-08 +/-9.82E-08 2.07E-07 uCi/g luropium-155 u 4.09E-08 +/-9.26E-08 l.78E-07 uCi/g ridium-192 u -9.77E-09 +/-3.30E-08 6.23E-08 uCi/g ron-59 u -1.13E-07 +/-8.8 lE-08 l.30E-07 uCi/g

,ead-210 u l.76E-06 +/-3.85E-06 7.74E-06 uCi/g

,ead-212 8.25E-07 +/-1.17E-07 9.62E-08 uCi/g

,ead-214 8.47E-07 +/-l.71E-07 3.05E-07 uCi/g llanganese-54 u 4.48E-09 +/-3. IOE-08 6.44E-08 uCi/g llercury-203 u l.71E-09 +/-3.91E-08 7.65E-08 uCi/g

~eodymium-147 u 2.12E-07 +/-l.20E-06 2.38E-06 uCi/g kptunium-239 u 2.53E-07 +/-3.54E-07 3.88E-07 uCi/g fobium-94 u l.98E-09 +/-4.1 OE-08 7.55E-08 uCi/g

~iobium-95 u -2.03E-08 +/-5.02E-08 7.55E-08 uCi/g

  • otassium-40 9.76E-06 +/-1.35E-06 6.15E-07 uCi/g
  • romethium-144 u -l.90E-08 +/-3.65E-08 6.26E-08 uCi/g

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 9563 8

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0030 (F8300143-1) Project: SMUD00201 Sample ID: 407403001 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

'romethium-146 u 1.72E-08 +/-3.79E-08 7.72E-08 uCi/g tadium-223 u -4.08E-07 +/-5.93E-07 1.07E-06 uCi/g tadium-224 UI 0.00 +/-l.07E-06 1.03E-06 uCi/g tadium-228 7.lOE-07 +/-2.87E-07 2.34E-07 uCi/g tuthenium-106 u 1.41E-07 +/-3.37E-07 6.69E-07 uCi/g

ilver-llOm u 1.0IE-08 +/-3.96E-08 8.53E-08 uCi/g

, :odium-22 u 8.78E-09 +/-3.51E-08 7.44E-08 uCi/g 1Jallium-208 3.20E-07 +/-8.54E-08 5.53E-08 uCi/g 1Jorium-234 UI 0.00 +/-2.69E-06 1.97E-06 uCi/g

in-113 u 3.91E-09 +/-3.99E-08 7.86E-08 uCi/g Jranium-235 u -5.14E-08 +/-1.82E-07 3.23E-07 uCi/g Jranium-238 UI 0.00 +/-2.69E-06 1.97E-06 uCi/g rttrium-88 u -1.30E-08 +/-2.71E-08 5.38E-08 uCi/g

'.inc-65 u 6.77E-08 +/-7.32E-08 1.62E-07 uCi/g

'.irconium-95 u l.30E-08 +/-8.49E-08 l.63E-07 uCi/g

[he following Prep Methods were performed:

vlethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTI 10/05/16 0854 1604293 The following Analytical Methods were performed:

Method Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-01-R

~otes:

~ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 2

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0031 (F8300143-3) Project: SMUD00201 Sample ID: 407403002 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 13:39 Receive Date: 04-0CT-16 Collector: Client

  • Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

~ctinium-228 7.29E-07 +/-2.84E-07 2.29E-07 uCi/g MXRl 10/21/16 1429 1604416

~ericium-241 u -5.33E-08 +/-2.05E-07 3.65E-07 uCi/g illtimony-124 u 4.80E-08 +/-9.29E-08 2.32E-07 uCi/g illtimony-125 u 2.14E-08 +/-8.30E-08 l.66E-07 uCi/g larium-133 u -7.09E-09 +/-5.82E-08 7.66E-08 uCi/g larium-140 u -l.67E-07 +/-4.71E-07 8.64E-07 uCi/g leryllium-7 u 3.79E-07 +/-4.00E-07 8.54E-07 uCi/g lismuth-212 UI 0.00 +/-6.72E-07 l.41E-06 uCi/g lismuth-214 5.59E-07 +/-l .64E-07 l.43E-07 uCi/g

erium-139 u 3.15E-09 +/-2.99E-08 5.81E-08 uCi/g
erium-141 u 1.08E-08 +/-7.57E-08 l.49E-07 uCi/g
erium-144 u 5.07E-08 +/-1.95E-07 3.55E-07 uCi/g
esium-134 u 3.53E-08 +/-3.80E-08 8.53E-08 uCi/g
esium-136 u -l.33E-07 +/-l.93E-07 3.45E-07 uCi/g
esium-137 u -3.07E-08 +/-3.91E-08 6.56E-08 l.OOE-07 uCi/g
hromium-51 u -2.63E-07 +/-4.93E-07 8.87E-07 uCi/g
obalt-56 u -l.44E-08 +/-4.81E-08 8.57E-08 uCi/g
obalt-57 u 2.14E-08 +/-2.63E-08 5.04E-08 uCi/g
obalt-58 u -3.74E-09 +/-4.08E-08 7.75E-08 uCi/g
obalt-60 u 6.49E-09 +/-3.27E-08 7.22E-08 l.OOE-07 uCi/g

\uropium-152 u 5.92E-08 +/-8.56E-08 l.74E-07 uCi/g luropium-154 u -l.05E-08 +/-7.99E-08 l.68E-07 uCi/g

\uropium-155 u l.61E-08 +/-l.12E-07 2.02E-07 uCi/g ridium-192 u 6.61E-09 +/-3.SOE-08 6.92E-08 uCi/g ron-59 u -5.lOE-08 +/-7.99E-08 l.44E-07 uCi/g

,ead-210 u -l.43E-06 +/-8.8 lE-06 l.59E-05 uCi/g

,ead-212 7.66E-07 +/-1.15E-07 8.72E-08 uCi/g

,ead-214 6.l 7E-07 +/-l.60E-07 l.37E-07 uCi/g tlanganese-54 u 2.03E-08 +/-3.82E-08 7.90E-08 uCi/g tlercury-203 u -l.32E-08 +/-4.02E-08 7.49E-08 uCi/g

~eodymium-147 u l.25E-07 +/-1.35E-06 2.62E-06 uCi/g

~eptunium-239 u -l.94E-07 +/-2.87E-07 4.71E-07 uCi/g fobium-94 u 1.64E-08 +/-3.55E-08 7.16E-08 uCi/g

~iobium-95 u 5.27E-08 +/-6.28E-08 6.64E-08 uCi/g

'otassium-40 8.67E-06 +/-l.33E-06 6.09E-07 uCi/g

'romethium-144 u 2.25E-08 +/-3.85E-08 7.63E-08 uCi/g 3

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0031 (F8300143-3) Project: SMUD00201 Sample ID: 407403002 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

  • romethium-146 U 4.82E-10 +/-3.71E-08 7.23E-08 uCi/g tadium-223 U 3.33E-07 +/-5.65E-07 1.16E-06 uCi/g tadium-224 U 3.89E-07 +/-l.05E-06 9.34E-07 uCi/g tadium-228 7.29E-07 +/-2.84E-07 2.29E-07 uCi/g tuthenium-106 U l.02E-07 +/-3.04E-07 6.19E-07 uCi/g
ilver-llOm U 8.67E-10 +/-3.79E-08 7.66E-08 uCi/g
odium-22 u -4.04E-09 +/-2.83E-08 5.93E-08 uCi/g

~hallium-208 2.57E-07 +/-8.27E-08 7.34E-08 uCi/g

'horium-234 u 2.53E-08 +/-l.89E-06 3.43E-06 uCi/g

~in-113 u -2.99E-08 +/-4.05E-08 7.03E-08 uCi/g Jranium-235 u -6.98E-08 +/-l.90E-07 3.57E-07 uCi/g Jranium-238 u 2.53E-08 +/-l.89E-06 3.43E-06 uCi/g

{ttrium-88 u 2.SlE-08 +/-3.6SE-08 9.8SE-08 uCi/g

'.inc-65 u -6.75E-08 +/-9.73E-08 l.71E-07 uCi/g

'.irconium-95 u 7.31E-09 +/-7.09E-08 l.41E-07 uCi/g

[he following Prep Methods were performed:

vlethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTl 10/05/16 0854 1604293 The following Analytical Methods were performed:

Method Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-Ol-R

~otes:

~ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 4

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0032 (F8300143-5) Project: SMUD00201 Sample ID: 407403003 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 14:17 Receive Date: 04-0CT-16 Collector: Client Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

\.ctinium-228 7.73E-07 +/-2.89E-07 2.18E-07 uCi/g MXRl 10/21/16 1429 1604416 l.mericium-241 u -3.93E-08 +/-1.46E-07 2.63E-07 uCi/g

\.ntimony-124 u -3.12E-08 +/-7.58E-08 l.52E-07 uCi/g l.ntimony-125 u 8.03E-09 +/-7 .90E-08 l.58E-07 uCi/g larium-133 u 2.86E-08 +/-5.0lE-08 6.39E-08 uCi/g larium-140 u -1.36E-07 +/-4.l 5E-07 7.93E-07 uCi/g leryllium-7 u -7.31E-08 +/-3.06E-07 5.92E-07 uCi/g lismuth-212 UI 0.00 +/-8.15E-07 l.09E-06 uCi/g lismuth-214 9.35E-07 +/-1.70E-07 l.1 lE-07 uCi/g

erium-139 u -8.56E-09 +/-2.58E-08 4.68E-08 uCi/g
erium-141 u l.07E-07 +/-1.73E-07 1.17E-07 uCi/g
erium-144 u -2.83E-08 +/-1.48E-07 2.78E-07 uCi/g
esium-134 u 4.79E-08 +/-4.29E-08 6.99E-08 uCi/g
esium-136 u -1.52E-07 +/-l.32E-07 2.08E-07 uCi/g
esium-137 u 4.29E-08 +/-4.43E-08 5.75E-08 l.OOE-07 uCi/g
hromium-51 u -1.99E-08 +/-3.60E-07 7.29E-07 uCi/g
obalt-56 u -l.79E-08 +/-3.30E-08 5.80E-08 uCi/g
obalt-57 u 1.68E-09 +/-1.97E-08 3.81E-08 uCi/g
obalt-58 u -7.88E-09 +/-3.29E-08 6.22E-08 uCi/g
obalt-60 u -l.02E-09 +/-2.30E-08 4.99E-08 l.OOE-07 uCi/g iuropium-152 u -9. lOE-08 +/-6.93E-08 l.18E-07 uCi/g iuropium-154 u 4.91E-08 +/-8.75E-08 l.99E-07 uCi/g
uropium-155 u 7.63E-08 +/-9.08E-08 1.86E-07 uCi/g ridium-192 u -l.60E-08 +/-3.02E-08 5.77E-08 uCi/g ron-59 u -3.40E-08 +/-7.39E-08 l.42E-07 uCi/g

,ead-210 u 1.36E-06 +/-4.78E-06 9.94E-06 uCi/g

,ead-212 8.66E-07 +/-l.22E-07 8.03E-08 uCi/g

,ead-214 8.21E-07 +/-l.69E-07 l.14E-07 uCi/g

'1anganese-54 u 7.13E-09 +/-2.84E-08 5.83E-08 uCi/g Jercury-203 u 3.00E-08 +/-5.48E-08 6.46E-08 uCi/g Jeodymium-147 u -7.91E-07 +/-9.64E-07 l.68E-06 uCi/g foptunium-239 u 3.91E-08 +/-2.06E-07 4.03E-07 uCi/g fobium-94 u -1.24E-08 +/-2.59E-08 4.68E-08 uCi/g Jiobium-95 u 7.23E-09 +/-4.49E-08 8.0lE-08 uCi/g

'otassium-40 7.56E-06 +/- l.16E-06 5.54E-07 uCi/g

'romethium-144 u -8.52E-09 +/-2. 70E-08 5.05E-08 uCi/g 5

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0032 (F8300143-5) Project: SMUD00201 Sample ID: 407403003 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

'romethium-146 u -3.47E-08 +/-3.46E-08 6.00E-08 uCi/g tadium-223 u -l.23E-08 +/-4.80E-07 9.65E-07 uCi/g tadium-224 UI 0.00 +/-9.76E-07 l.29E-06 uCi/g tadium-228 7.73E-07 +/-2.89E-07 2.18E-07 uCi/g tuthenium-106 u -5.45E-08 +/-2.54E-07 4.87E-07 uCi/g

ilver-l !Om u -3.39E-09 +/-3.50E-08 6.86E-08 uCi/g
odium-22 u l.5!E-08 +/-3.06E-08 6.90E-08 uCi/g
hallium-208 2.77E-07 +/-8.18E-08 6.2!E-08 uCi/g
horium-234 u 9.02E-07 +/-3.14E-06 2.16E-06 uCi/g

'in-113 u -9.06E-l l +/-3.82E-08 7.66E-08 uCi/g Jranium-235 u 3.40E-07 +/-4.03E-07 3.56E-07 uCi/g Jranium-238 u 9.02E-07 +/-3.14E-06 2.16E-06 uCi/g (ttrium-88 u -l.93E-08 +/-3.39E-08 5.98E-08 uCi/g

'.inc-65 u -l.llE-08 +/-7.40E-08 l.37E-07 uCi/g

irconium-95 u 2.43E-08 +/-4.76E-08 l.09E-07 uCi/g

[he following Prep Methods were performed:

viethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTl 10/05/16 0854 1604293 The following Analytical Methods were performed:

\1ethod Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-Ol-R

~otes:

ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

8olumn headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 6

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0033 (F8300143-8) Project: SMUD00201 Sample ID: 407403004 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 14:10 Receive Date: 04-0CT-16 Collector: Client Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

\.ctinium-228 4.46E-07 +/-3.91E-07 3.90E-07 uCi/g MXRl 10/21/16 1429 1604416

\.mericium-241 u -l.14E-08 +/-5.74E-08 9.13E-08 uCi/g l.ntimony-124 u 6.05E-08 +/-9.59E-08 2.68E-07 uCi/g l.ntimony-125 u -l.40E-08 +/-l.OOE-07 l.85E-07 uCi/g larium-133 u l.59E-08 +/-4.26E-08 8.45E-08 uCi/g larium-140 u -2.24E-08 +/-7.14E-07 l.19E-06 uCi/g leryllium-7 u -l.52E-07 +/-3.91E-07 6.94E-07 uCi/g lismuth-212 u 3.19E-07 +/-9.22E-07 l.39E-06 uCi/g lismuth-214 5.62E-07 +/-l.70E-07 l.53E-07 uCi/g

~erium-139 u l.OlE-08 +/-2.73E-08 5.42E-08 uCi/g

erium-141 u 7.40E-08 +/-7 .55E-08 l.56E-07 uCi/g
erium-144 u -7.66E-08 +/-l.96E-07 3.23E-07 uCi/g

~esium-134 u 5.69E-08 +/-5.IOE-08 l.17E-07 uCi/g

~esium-136 u 9.08E-08 +/-l.98E-07 4.58E-07 uCi/g

~esium-137 u -3.75E-09 +/-4.08E-08 8.lOE-08 l.OOE-07 uCi/g

~hromium-51 u -2.44E-07 +/-4.39E-07 7.75E-07 uCi/g

~obalt-56 u -3.21E-08 +/-4.48E-08 7.81E-08 uCi/g

~obalt-57 u -4.65E-10 +/-2.07E-08 4.0lE-08 uCi/g

~obalt-58 u 5.48E-08 +/-4. l 5E-08 9.09E-08 uCi/g

~obalt-60 u -2.92E-08 +/-4.28E-08 7.14E-08 l.OOE-07 uCi/g luropium-152 u -l.62E-08 +/-9.28E-08 l.72E-07 uCi/g luropium-154 u -7.26E-08 +/-l.39E-07 2.45E-07 uCi/g luropium-155 u l.42E-07 +/-l.60E-07 l.58E-07 uCi/g ridium-192 u l.41E-08 +/-3.73E-08 7.45E-08 uCi/g ron-59 u l.51E-08 +/-l.OOE-07 2.18E-07 uCi/g

,ead-210 u 3.40E-07 +/-8. l 7E-07 7.95E-07 uCi/g

,ead-212 7.29E-07 +/-l.22E-07 l.02E-07 uCi/g

,ead-214 6.68E-07 +/-l.62E-07 3.18E-07 uCi/g

.1anganese-54 u 5.88E-09 +/-4.49E-08 9.12E-08 uCi/g

.1ercury-203 u 3.08E-08 +/-4.66E-08 9.45E-08 uCi/g

~eodymium-147

  • u 2.91E-07 +/-l .53E-06 2.98E-06 uCi/g kptunium-239 u -3.29E-08 +/-2.08E-07 3.97E-07 uCi/g fobium-94 u -l.52E-08 +/-3.60E-08 6.76E-08 uCi/g fobium-95 u -l.OSE-08 +/-5.66E-08 l.09E-07 uCi/g

'otassium-40 8.54E-06 +/-l.46E-06 6.36E-07 uCi/g

'romethium-144 u 5.00E-09 +/-4.40E-08 8.81E-08 uCi/g 7

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0033 (F8300143-8) Project: SMUD00201 Sample ID: 407403004 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

'romethium-146 u -2.19E-08 +/-5.13E-08 8.97E-08 uCi/g tadium-223 u 8.64E-07 +/-5.82E-07 l.32E-06 uCi/g tadium-224 u 5.19E-07 +/-1.06E-06 l.09E-06 uCi/g tadium-228 4.46E-07 +/-3.91E-07 3.90E-07 uCi/g tuthenium-106 u 3.29E-07 +/-4.03E-07 8.46E-07 uCi/g

ilver-llOm u -7.24E-09 +/-5.55E-08 l.lOE-07 uCi/g
odium-22 u -2.16E-08 +/-4.69E-08 8.46E-08 uCi/g
hallium-208 2.44E-07 +/-6.61E-08 7.06E-08 uCi/g
horium-234 u 8.68E-07 +/-l.07E-06 9.99E-07 uCi/g

'in-113 u -8.49E-09 +/-4.45E-08 8.28E-08 uCi/g Jranium-235 u l.lOE-07 +/-2.03E-07 4.04E-07 uCi/g Jranium-238 u 8.68E-07 +/-1.07E-06 9.99E-07 uCi/g

{ttrium-88 u -1.80E-08 +/-3.92E-08 7.83E-08 uCi/g

'.inc-65 u 9.66E-08 +/-l.07E-07 2.34E-07 uCi/g

irconium-95 u 1.70E-09 +/-8.17E-08 l.68E-07 uCi/g

[he following Prep Methods were performed:

vlethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTl 10/05/16 0854 1604293 The following Analytical Methods were performed:

\!Iethod Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-Ol-R

~otes:

~ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 8

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0034 (F8300143-9) Project: SMUD00201 Sample ID: 407403005 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 13:53 Receive Date: 04-0CT-16 Collector: Client Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected" l.ctinium-228 7.32E-07 +/-3.45E-07 2.78E-07 uCi/g MXRl 10/21/16 1429 1604416 l.mericium-241 u 2.28E-07 +/-3.85E-07 3.96E-07 uCi/g l.ntimony-124 u -l.05E-07 +/-1.13E-07 l.81E-07 uCi/g l.ntimony-125 u -3.98E-08 +/-7.31E-08 l.27E-07 uCi/g larium-133 u 5.12E-08 +/-5.42E-08 7.28E-08 uCi/g larium-140 u -2.48E-07 +/-4.96E-07 9.29E-07 uCi/g leryllium-7 u 4.04E-07 +/-4.l 8E-07 8.77E-07 uCi/g lismuth-212 u 5.33E-07 +/-6.05E-07 l.29E-06 uCi/g lismuth-214 6.38E-07 +/-l.46E-07 l.22E-07 uCi/g

erium-139 u 3.21E-08 +/-2.70E-08 5.41E-08 uCi/g
erium-141 u l.88E-11 +/-7.l 2E-08 l.39E-07 uCi/g
erium-144 u -8.07E-08 +/-1.72E-07 3.25E-07 uCi/g

~esium-134 u 3.85E-08 +/-5.13E-08 8.36E-08 uCi/g

esium-136 u 3.60E-08 +/-2.30E-07 4.61E-07 uCi/g
esium-137 u 2.27E-08 +/-4.37E-08 9.03E-08 l.OOE-07 uCi/g
hromium-51 u -2.23E-07 +/-5.00E-07 8.96E-07 uCi/g
obalt-56 u -7.14E-09 +/-4.44E-08 8.51E-08 uCi/g
obalt-57 u -9.55E-09 +/-2.42E-08 4.15E-08 uCi/g
obalt-58 u 2.48E-08 +/-4.23E-08 9.28E-08 uCi/g
obalt-60 u 6.05E-09 +/-4.90E-08 9.0lE-08 l.OOE-07 uCi/g iuropium-152 u -3.89E-08 +/-1.l 3E-07 l.61E-07 uCi/g iuropium-154 u 3.64E-08 +/-l.12E-07 2.46E-07 uCi/g iuropium-155 u -l.02E-08 +/-9.84E-08 l.77E-07 uCi/g ridium-192 u 2.53E-08 +/-4.09E-08 7.58E-08 uCi/g ron-59 u 4.64E-09 +/-1.0IE-07 2.02E-07 uCi/g

,ead-210 u 6.65E-06 +/-9.61E-06 l.94E-05 uCi/g

,ead-212 7.03E-07 +/-1.1 OE-07 8.66E-08 uCi/g

,ead-214 7.00E-07 +/-1.43E-07 2.84E-07 uCi/g

.1anganese-54 u 1.13E-08 +/-3.77E-08 7.78E-08 uCi/g ilercury-203 u -2.14E-11 +/-4.26E-08 8.lOE-08 uCi/g Jeodymium-147 u -l.45E-07 +/-l.32E-06 2.61E-06 uCi/g foptunium-239 u -1.74E-09 +/-2.37E-07 4.29E-07 uCi/g Jiobium-94 u 2.55E-08 +/-3.38E-08 7.34E-08 uCi/g Jiobium-95 u 2.71E-08 +/-4.59E-08 9.24E-08 uCi/g

'otassium-40 8.18E-06 +/-1.36E-06 7.07E-07 uCi/g

'romethium-144 u 3.60E-08 +/-9.64E-08 7.19E-08 uCi/g 9

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0034 (F8300143-9) Project: SMUD00201 Sample ID: 407403005 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

Jammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

'romethium-146 U 8.39E-09 +/-3.75E-08 7.39E-08 uCi/g tadium-223 U 7.04E-08 +/-6.30E-07 l.20E-06 uCi/g

' tadium-224 UI 0.00 +/-l.30E-06 9.28E-07 uCi/g tadium-228 7.32E-07 +/-3.45E-07 2.78E-07 uCi/g tuthenium-106 u -4.00E-08 +/-3.66E-07 7.07E-07 uCi/g

ilver-1 lOm u -l.27E-08 +/-4.19E-08 7.97E-08 uCi/g
odium-22 u l.22E-08 +/-3.97E-08 8.70E-08 uCi/g
hallium-208 2.35E-07 +/-7.98E-08 7.56E-08 uCi/g borium-234 u 9.13E-07 +/-2.07E-06 3.17E-06 uCi/g
in-113 u -l.60E-08 +/-4.0 lE-08 7.18E-08 uCi/g Jraniurn-235 u 2.37E-08 +/-l.76E-07 3.46E-07 uCi/g Jranium-238 u 9.BE-07 +/-2.07E-06 3.17E-06 uCi/g

{ttrium-88 u -5.45E-10 +/-2.52E-08 6.46E-08 uCi/g

'.inc-65 u 6.93E-09 +/-8.72E-08 l.55E-07 uCi/g

'.irconiurn-95 u l.39E-08 +/-5.95E-08 l.30E-07 uCi/g rhe following Prep Methods were performed:

vlethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTl 10/05/16 0854 1604293 The following Analytical Methods were performed:

\1ethod Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-Ol-R IJotes:

~ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

2olumn headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 10

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0035 (F8300143-10) Project: SMUD00201 Sample ID: 407403006 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 14:23 Receive Date: 04-0CT-16 Collector: Client Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

Jammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

\ctinium-228 9.63E-07 +/-2.39E-07 J.71E-07 uCi/g MXRl 10/21/16 1431 1604416

\mericium-241 UI 0.00 +/-1.34E-07 l.23E-07 uCi/g

\ntimony-124 u 2.25E-08 +/-7.94E-08 l.74E-07 uCi/g

\ntimony-125 u -5.45E-09 +/-6.52E-08 l.28E-07 uCi/g larium-133 u -l.60E-08 +/-2.73E-08 4.48E-08 uCi/g larium-140 u l.23E-07 +/-3.83E-07 7.88E-07 uCi/g leryllium-7 u -5.84E-08 +/-2.60E-07 5.0IE-07 uCi/g lismuth-212 u 7.89E-07 +/-6.93E-07 l.OlE-06 uCi/g lismuth-214 5.66E-07 +/-l.53E-07 l.05E-07 uCi/g

erium-139 u 3.81E-09 +/-2.1 OE-08 3.98E-08 uCi/g
erium-141 u -2.52E-08 +/-6.l 7E-08 1.l IE-07 uCi/g
erium-144 u 4.70E-08 +/-l .50E-07 2.68E-07 uCi/g
esium-134 u 5.86E-08 +/-5.02E-08 7.68E-08 uCi/g
esium-136 u l.37E-07 +/-J.50E-07 3.44E-07 uCi/g
esium-137 UI 0.00 +/-3.52E-08 3.20E-08 l.OOE-07 uCi/g
hromium-51 u 2.49E-08 +/-3.56E-07 7.17E-07 uCi/g
obalt-56 u 2.70E-08 +/-3.35E-08 7.17E-08 uCi/g
obalt-57 u 2.13E-09 +/-l.76E-08 3.37E-08 uCi/g
obalt-58 u l.05E-08 +/-3.15E-08 6.41E-08 uCi/g
obalt-60 u -8.45E-09 +/-2.88E-08 5.61E-08 l.OOE-07 uCi/g luropium-152 u -4.87E-08 +/-6.70E-08 l.24E-07 uCi/g luropium-154 u 2.31E-08 +/-7.16E-08 l.56E-07 uCi/g luropium-155 u 7.20E-08 +/-6.65E-08 l.38E-07 uCilg ridium-192 u -l.59E-08 +/-2.60E-08 4.90E-08 uCi/g ron-59 u -8.18E-10 +/-5.lOE-08 1.lOE-07 uCi/g

,ead-210 u l.82E-07 +/-l.04E-06 2.16E-06 uCi/g

,ead-212 J.04E-06 +/-l.12E-07 7.03E-08 uCi/g

,ead-214 9.36E-07 +/-l .45E-07 9.13E-08 uCilg llanganese-54 u 5.41E-08 +/-3.80E-08 5.84E-08 uCi/g llercury-203 u -l.41E-08 +/-3.24E-08 6.25E-08 uCi/g

~eodymium-147 u 4.29E-07 +/-8.84E-07 l.87E-06 uCi/g

~eptunium-239 u -4.l 7E-08 +/-1.70E-07 3.16E-07 uCi/g fobium-94 u 5.63E-09 +/-2.04E-08 4.19E-08 uCi/g

~iobium-95 u -2.48E-08 +/-3.95E-08 5.82E-08 uCi/g

'otassium-40 7.79E-06 +/-9.78E-07 4.83E-07 uCilg

'romethium-144 u 5.45E-09 +/-2.83E-08 5.52E-08 uCi/g 11

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0035 (F8300143-10) Project: SMUD00201 Sample ID: 407403006 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

Jammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

'romethium-146 U 3.16E-08 +/-3.llE-08 6.78E-08 uCi/g tadium-223 U -3.25E-07 +/-4.32E-07 8.00E-07 uCi/g tadium-224 U 7.30E-07 +/-1.33E-06 7.53E-07 uCi/g tadium-228 9.63E-07 +/-2.39E-07 1.71E-07 uCi/g tuthenium-106 u -6.75E-08 +/-2.19E-07 4.09E-07 uCi/g

ilver-llOm u 1.15E-08 +/-4.20E-08 8.27E-08 uCi/g
odium-22 u l.OlE-08 +/-2.59E-08 5.68E-08 uCi/g

~hallium-208 2.35E-07 +/-6.12E-08 5.0lE-08 uCi/g

'horium-234 UI 0.00 +/-1.36E-06 1.21E-06 uCi/g

~in-113 u l.87E-08 +/-3.06E-08 6.55E-08 uCi/g Jranium-235 u -l.40E-08 +/-1.42E-07 2.63E-07 uCi/g Jranium-238 UI 0.00 +/-1.36E-06 1.21E-06 uCi/g

{ttrium-88 u -6.88E-09 +/-3.13E-08 6.17E-08 uCi/g

inc-65 u -1.86E-08 +/-5.38E-08 8.98E-08 uCi/g

'.irconium-95 u 5.28E-08 +/-6.13E-08 1.32E-07 uCi/g

[he following Prep Methods were performed:

vfethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTl 10/05/16 0854 1604293 The following Analytical Methods were performed:

\1ethod Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-Ol-R

~otes:

~ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 12

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 -www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0036 (F8300143-14) Project: SMUD00201 Sample ID: 407403007 Client ID: SMUD002 Matrix: Soil Collect Date: 22-SEP-16 14:00 Receive Date: 04-0CT-16 Collector: Client Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

\ctinium-228 8.18E-07 +/-2.25E-07 l.96E-07 uCi/g MXRl 10/21/16 1432 1604416

\mericium-241 u 4.48E-08 +/-7.44E-08 l.41E-07 uCi/g

\ntimony-124 u -l.27E-08 +/-4. l 8E-08 8.96E-08 uCi/g illtimony-125 u -l.51E-08 +/-6.89E-08 l.31E-07 uCi/g larium-133 u 4.48E-10 +/-3.37E-08 5.99E-08 uCi/g larium-140 u -4.40E-08 +/-4.04E-07 7.79E-07 uCi/g leryllium-7 u -l.44E-07 +/-2.55E-07 4.63E-07 uCi/g lismuth-212 UI 0.00 +/-6.07E-07 9.63E-07 uCi/g lismuth-214 7.22E-07 +/-l.69E-07 l.09E-07 uCi/g

erium-139 u -2.00E-09 +/-2.46E-08 3.59E-08 uCi/g
erium-141 u 3.07E-08 +/-5.64E-08 l.09E-07 uCi/g
erium-144 u 2.93E-10 +/-l .43E-07 2.63E-07 uCi/g
esium-134 u l.35E-08 +/-3.14E-08 6.39E-08 uCi/g
esium-136 u 6.84E-08 +/-l.44E-07 3.19E-07 uCi/g
esium-137 UI 0.00 +/-5.20E-08 4.86E-08 l.OOE-07 uCi/g
hromium-51 u 8.29E-09 +/-3.72E-07 7.37E-07 uCi/g
obalt-56 u l.79E-08 +/-2.84E-08 6.22E-08 uCi/g
obalt-57 u 9.60E-09 +/-l.86E-08 3.63E-08 uCi/g
obalt-58 u l.40E-08 +/-3.29E-08 6.77E-08 uCi/g
obalt-60 u 2.30E-08 +/-2.34E-08 5.88E-08 l.OOE-07 uCi/g iuropium-152 u -8.91E-09 +/-6.82E-08 l.33E-07 uCi/g iuropium-154 u -8.95E-09 +/-6.75E-08 l.38E-07 uCi/g
uropium-155 u 2.72E-08 +/-7.35E-08 l.42E-07 uCi/g ridium-192 u -5.72E-09 +/-2.87E-08 5.55E-08 uCi/g ron-59 u 3.46E-08 +/-7 .93E-08 l.58E-07 uCi/g

,ead-210 u l.15E-06 +/-2.85E-06 2.61E-06 uCi/g

,ead-212 8.48E-07 +/-l.22E-07 9.59E-08 uCi/g

,ead-214 7.64E-07 +/-l.79E-07 l.lOE-07 uCi/g ilanganese-54 u l.46E-08 +/-3.04E-08 6.l 7E-08 uCi/g l!ercury-203 u 4.66E-10 +/-3 .l lE-08 6.18E-08 uCi/g

~eodymium-147 u 5.llE-07 +/-l.05E-06 2.16E-06 uCi/g kptunium-239 u l.19E-07 +/-l.8 lE-07 3.57E-07 uCi/g fobium-94 u 5.13E-08 +/-3.22E-08 5.68E-08 uCi/g fobium-95 u l.17E-09 +/-4.07E-08 6.95E-08 uCi/g

'otassium-40 8.45E-06 +/-l.23E-06 4.46E-07 uCi/g

'romethium-144 u -6.94E-09 +/-2.70E-08 4.72E-08 uCi/g 13

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: October 27, 2016 Company: Sacramento Municipal Utility District Address: 14440 Twin Cites Road Herald, California 95638

Contact:

Mr. Dave Koontz Project: Rancho Seco IOSB Soil and Water Analysis Client Sample ID: 2016-0036 (F8300143-14) Project: SMUD00201 Sample ID: 407403007 Client ID: SMUD002 Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method tad Gamma Spec Analysis

}ammaspec, Gamma, Solid (Standard List) "Dry Weight Corrected"

'romethium-146 u l.89E-09 +/-2.48E-08 5.03E-08 uCi/g tadium-223 u 2.20E-07 +/-4.29E-07 8.29E-07 uCi/g ladium-224 UI 0.00 +/-8.18E-07 1.21E-06 uCi/g ladium-228 8.18E-07 +/-2.25E-07 1.96E-07 uCi/g tuthenium-106 u -1.59E-07 +/-2.4 IE-07 4.20E-07 uCi/g

ilver-1 lOm u 6.29E-08 +/-6.8 IE-08 7.87E-08 uCi/g
odium-22 u -6.42E-09 +/-2.47E-08 4.89E-08 uCi/g

'hallium-208 2.64E-07 +/-5.86E-08 3.61E-08 uCi/g

'horium-234 u 1.21E-06 +/-2.21E-06 1.38E-06 uCi/g

'in-113 u -2.17E-10 +/-3.19E-08 6.32E-08 uCi/g Jranium-235 u 8.83E-08 +/-1.3 6E-07 2.66E-07 uCi/g Jranium-238 u l.21E-06 +/-2.21E-06 1.38E-06 uCi/g (ttrium-88 u 4.14E-09 +/-2.40E-08 5.76E-08 uCi/g

inc-65 u -4.SOE-08 +/-5.17E-08 6.80E-08 uCi/g

'.irconium-95 u 1.0SE-07 +/-1.39E-07 1.31E-07 uCi/g

['he following Prep Methods were performed:

v1ethod Description Analyst Date Time Prep Batch

)ry Soil Prep Dry Soil Prep GL-RAD-A-021 LYTl 10/05/16 0854 1604293 The following Analytical Methods were performed:

\1ethod Description Analyst Comments DOE HASL 300, 4.5.2.3/Ga-Ol-R

~otes:

~ounting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Le/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit 14

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