ML073400143

EP-RX-125, Nasa, Survey Unit Release Record

ML073400143
Person / Time
Site:	Plum Brook
Issue date:	11/29/2007
From:	US National Aeronautics & Space Admin (NASA)
To:	NRC/RGN-III/DNMS/DB
References
EP-Rx-125
Download: ML073400143 (24)

Text

Survey Unit Release Record Design # EP-Rx 125 Revision # Original Page 1 of 3 Survey Unit #(s)

1) Embedded Pipe (EP) Survey Unit Rx 125 meets the defmition of embedded pipe for Plum Brook Reactor Facility (PBRF).

2) EP Rx 125 is a Class 1, Group 2 survey unit a s per the PBRF Final Status Survey Plan (FSSP) and Technical Basis Document (TBD)-06-004.

3) Surveys in EP Rx 125 were performed using a scintillation detector optimized to measure gamma energies representative of Co-60. Sample #EP 2-4 from Survey Request (SR)-13 was referenced for this decision.

4) Survey Instructions for this survey unit are incorporated into and performed in accordance with (IAW) the Babcock Services Incorporated (BSI)/LVS-002, Work Execution Package (WEP)05-006. Survey instructions described in this Description document constitute "Special Methods" and the survey design used in the acquisition of survey measurements.

5) Instrument efficiency determinations are developed in accordance with the BSILVS-002, WEP 05-006, these determinations are appropriate for the types of radiation involved and the media being surveyed.

Approval Signatures Date:

FSSICharacterization Manager

FSS Design # EP Rx 125 Revision # Original Page 2 of 3 Survey Unit: Rx 125 1.0 History/Description 1.1 The subject pipe system is a combination of 2 and 4 drain lines located on the -15 el. of the Rx building.

1.2 EP Rx 125 consists of 2 and 4 diameter piping that is approximately 127 feet in length.

2.0 Survey Design Information 2.1 EP Rx 125 was surveyed IAW Procedure #BSI/LVS-002.

2.2 100% of the 2 and 4 ID pipe was accessible for survey. The accessible 4 ID pipe was surveyed by static measurement at one foot increments, for a total of 127 survey measurements.

2.3 The total surface area for the 2 and 4 ID piping sections is 95,342 cm2 (9.5 m2) for the entire length of (approximately 127) of 2 and 4 piping.

3.0 Survey Unit Measurement Locations/Data 3.1 Pipe interior radiological survey forms are provided in Attachment 2 of this release record.

4.0 Survey Unit Investigations/Results 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EP/Buried Pipe (BP) Survey Report provided in Attachment 1.

5.2 All measurement results are less than the Derived Concentration Guideline Level (DCGL) for radionuclide specific EP that corresponds to the 1 mrem/yr dose goal established in Table 3-3 of the FSSP.

5.3 When implementing the Unity Rule, provided in Section 3.6.3 of the FSSP, and applying the Nuclide Fraction (NF), provided in TBD-06-004, the survey unit that is constituted by EP Rx 125 passes FSS.

5.4 Background was not subtracted from the survey measurements and the Elevated Measurement Comparison (EMC) was not employed for this survey unit.

FSS Design # EP Rx 125 Revision # Original Page 3 of 3 Survey Unit: Rx 125 5.5 Statistical Summary Table 2, 4 Statistical Parameter Pipe Total Number of Survey Measurements 127 Number of Measurements >MDC 92 Number of Measurements Above 50% of DCGL 0 Number of Measurements Above DCGL 0 Mean 0.0161 Median 0.0154 Standard Deviation 0.0060 Maximum 0.0356 Minimum 0.0023 6.0 Documentation of evaluations pertaining to compliance with the unrestricted use limit of 25 mrem/yr and dose contributions from Embedded Pipe and radionuclides contributing 10% in aggregate of the total dose for both structural scenarios and soils.

6.1 A review of the survey results has shown that the dose contribution for EP Rx 125 to be less than 1 mrem/yr. The dose contribution is estimated to be 0.016 mrem/yr based on the average of the actual gross counts measured.

7.0 Attachments Attachment 1 - BSI EP/BP Survey Report Attachment 2 - Pipe Interior Radiological Survey Form Attachment 3 - DQA Worksheet Attachment 4 -Disc containing RR for EP Rx 125 & Spreadsheet

SECTION 7 ATTACHMENT 1 b PAGE(S)

BSI EPlBP SURVEY REPORT 203488.212223 DetectorSled #

Number of Measurements >MDC Number of MeasurementsAbove DCGL Minimum Survey Technician@)

TBD 06004 Piping Group 2 SR-13 Radionuclide Distribution Sample EP 2-4 Measured Nuclide C0-60 Area FadorIEMC Used No PassIFail FSS Pass MREMNR Contribution <I COMMENTS:

ACTIVIN VALUES NOT BACKGROUND CORRECTED RP Engineer I Date

//- 2 7 - 0 7 -

EP Rx 125 2" 4" Pipe TBD 06-004 Group 2 Measurement #

Co-60 activity Co-60 activity Cs-137 activity Eu-152 activity Eu-154 activity Nb-94 activity Ag-108m activity gcpm ncpm (total dpm) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

Unity 1 15 15 28,846 2,965 1,537 25 17 1 85 0.013 2 10 10 19,231 1,977 1,025 16 12 1 57 0.009 3 21 21 40,385 4,151 2,152 34 24 2 119 0.018 4 15 15 28,846 2,965 1,537 25 17 1 85 0.013 5 17 17 32,692 3,360 1,742 28 20 2 97 0.015 6 9 9 17,308 1,779 922 15 10 1 51 0.008 7 9 9 17,308 1,779 922 15 10 1 51 0.008 8 10 10 19,231 1,977 1,025 16 12 1 57 0.009 9 6 6 11,538 1,186 615 10 7 1 34 0.005 10 15 15 28,846 2,965 1,537 25 17 1 85 0.013 11 18 18 34,615 3,558 1,845 30 21 2 102 0.015 12 17 17 32,692 3,360 1,742 28 20 2 97 0.015 13 12 12 23,077 2,372 1,230 20 14 1 68 0.010 14 11 11 21,154 2,174 1,127 18 13 1 63 0.009 15 13 13 25,000 2,570 1,332 21 15 1 74 0.011 16 16 16 30,769 3,163 1,640 26 19 2 91 0.014 17 10 10 19,231 1,977 1,025 16 12 1 57 0.009 18 13 13 25,000 2,570 1,332 21 15 1 74 0.011 19 17 17 32,692 3,360 1,742 28 20 2 97 0.015 20 13 13 25,000 2,570 1,332 21 15 1 74 0.011 21 11 11 21,154 2,174 1,127 18 13 1 63 0.009 22 11 11 21,154 2,174 1,127 18 13 1 63 0.009 23 10 10 19,231 1,977 1,025 16 12 1 57 0.009 24 17 17 32,692 3,360 1,742 28 20 2 97 0.015 25 10 10 19,231 1,977 1,025 16 12 1 57 0.009 26 10 10 19,231 1,977 1,025 16 12 1 57 0.009 27 22 22 42,308 4,349 2,255 36 25 2 125 0.019 28 16 16 30,769 3,163 1,640 26 19 2 91 0.014 29 17 17 32,692 3,360 1,742 28 20 2 97 0.015 30 16 16 30,769 3,163 1,640 26 19 2 91 0.014 31 10 10 19,231 1,977 1,025 16 12 1 57 0.009 1 of 5

EP Rx 125 2" 4" Pipe TBD 06-004 Group 2 Measurement #

Co-60 activity Co-60 activity Cs-137 activity Eu-152 activity Eu-154 activity Nb-94 activity Ag-108m activity gcpm ncpm (total dpm) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

Unity 32 14 14 26,923 2,767 1,435 23 16 1 80 0.012 33 16 16 30,769 3,163 1,640 26 19 2 91 0.014 34 13 13 25,000 2,570 1,332 21 15 1 74 0.011 35 14 14 26,923 2,767 1,435 23 16 1 80 0.012 36 22 22 42,308 4,349 2,255 36 25 2 125 0.019 37 15 15 28,846 2,965 1,537 25 17 1 85 0.013 38 20 20 38,462 3,953 2,050 33 23 2 114 0.017 39 12 12 23,077 2,372 1,230 20 14 1 68 0.010 40 18 18 34,615 3,558 1,845 30 21 2 102 0.015 41 16 16 30,769 3,163 1,640 26 19 2 91 0.014 42 12 12 23,077 2,372 1,230 20 14 1 68 0.010 43 24 24 46,154 4,744 2,460 39 28 2 137 0.021 44 13 13 25,000 2,570 1,332 21 15 1 74 0.011 45 10 10 19,231 1,977 1,025 16 12 1 57 0.009 46 27 27 51,923 5,337 2,767 44 31 3 154 0.023 47 22 22 42,308 4,349 2,255 36 25 2 125 0.019 48 11 11 21,154 2,174 1,127 18 13 1 63 0.009 49 17 17 32,692 3,360 1,742 28 20 2 97 0.015 50 19 19 36,538 3,756 1,947 31 22 2 108 0.016 51 25 25 48,077 4,942 2,562 41 29 2 142 0.021 52 15 15 28,846 2,965 1,537 25 17 1 85 0.013 53 12 12 23,077 2,372 1,230 20 14 1 68 0.010 54 12 12 23,077 2,372 1,230 20 14 1 68 0.010 55 18 18 34,615 3,558 1,845 30 21 2 102 0.015 56 19 19 36,538 3,756 1,947 31 22 2 108 0.016 57 18 18 34,615 3,558 1,845 30 21 2 102 0.015 58 21 21 40,385 4,151 2,152 34 24 2 119 0.018 59 32 32 61,538 6,325 3,280 52 37 3 182 0.027 60 22 22 42,308 4,349 2,255 36 25 2 125 0.019 61 12 12 23,077 2,372 1,230 20 14 1 68 0.010 62 22 22 42,308 4,349 2,255 36 25 2 125 0.019 2 of 5

EP Rx 125 2" 4" Pipe TBD 06-004 Group 2 Measurement #

Co-60 activity Co-60 activity Cs-137 activity Eu-152 activity Eu-154 activity Nb-94 activity Ag-108m activity gcpm ncpm (total dpm) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

Unity 63 23 23 44,231 4,546 2,357 38 27 2 131 0.020 64 26 26 50,000 5,139 2,665 43 30 3 148 0.022 65 19 19 36,538 3,756 1,947 31 22 2 108 0.016 66 20 20 38,462 3,953 2,050 33 23 2 114 0.017 67 9 9 17,308 1,779 922 15 10 1 51 0.008 68 16 16 30,769 3,163 1,640 26 19 2 91 0.014 69 12 12 23,077 2,372 1,230 20 14 1 68 0.010 70 5 5 25,000 5,139 2,665 43 30 3 148 0.022 71 2 2 10,000 2,056 1,066 17 12 1 59 0.009 72 4.5 4.5 22,500 4,625 2,398 38 27 2 133 0.020 73 3.5 3.5 17,500 3,598 1,865 30 21 2 104 0.016 74 5.5 5.5 27,500 5,653 2,931 47 33 3 163 0.025 75 5.5 5.5 27,500 5,653 2,931 47 33 3 163 0.025 76 2.5 2.5 12,500 2,570 1,332 21 15 1 74 0.011 77 5 5 25,000 5,139 2,665 43 30 3 148 0.022 78 3 3 15,000 3,084 1,599 26 18 2 89 0.013 79 4 4 20,000 4,112 2,132 34 24 2 118 0.018 80 3 3 15,000 3,084 1,599 26 18 2 89 0.013 81 8 8 40,000 8,223 4,264 68 48 4 237 0.036 82 5.5 5.5 27,500 5,653 2,931 47 33 3 163 0.025 83 7 7 35,000 7,195 3,731 60 42 4 207 0.031 84 2.5 2.5 12,500 2,570 1,332 21 15 1 74 0.011 85 3 3 15,000 3,084 1,599 26 18 2 89 0.013 86 4.5 4.5 22,500 4,625 2,398 38 27 2 133 0.020 87 4 4 20,000 4,112 2,132 34 24 2 118 0.018 88 2 2 10,000 2,056 1,066 17 12 1 59 0.009 89 5 5 25,000 5,139 2,665 43 30 3 148 0.022 90 3.5 3.5 17,500 3,598 1,865 30 21 2 104 0.016 91 2.5 2.5 12,500 2,570 1,332 21 15 1 74 0.011 92 6.5 6.5 32,500 6,681 3,464 55 39 3 192 0.029 93 5.5 5.5 27,500 5,653 2,931 47 33 3 163 0.025 3 of 5

EP Rx 125 2" 4" Pipe TBD 06-004 Group 2 Measurement #

Co-60 activity Co-60 activity Cs-137 activity Eu-152 activity Eu-154 activity Nb-94 activity Ag-108m activity gcpm ncpm (total dpm) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

Unity 94 4.5 4.5 22,500 4,625 2,398 38 27 2 133 0.020 95 2.5 2.5 12,500 2,570 1,332 21 15 1 74 0.011 96 3.5 3.5 17,500 3,598 1,865 30 21 2 104 0.016 97 3 3 15,000 3,084 1,599 26 18 2 89 0.013 98 4.5 4.5 22,500 4,625 2,398 38 27 2 133 0.020 99 3 3 15,000 3,084 1,599 26 18 2 89 0.013 100 4 4 20,000 4,112 2,132 34 24 2 118 0.018 101 4 4 20,000 4,112 2,132 34 24 2 118 0.018 102 4.5 4.5 22,500 4,625 2,398 38 27 2 133 0.020 103 5 5 25,000 5,139 2,665 43 30 3 148 0.022 104 1 1 2,632 541 281 4 3 0 16 0.002 105 11 11 28,947 5,951 3,086 49 35 3 171 0.026 106 12 12 31,579 6,492 3,366 54 38 3 187 0.028 107 12 12 31,579 6,492 3,366 54 38 3 187 0.028 108 7 7 18,421 3,787 1,964 31 22 2 109 0.016 109 8 8 21,053 4,328 2,244 36 25 2 125 0.019 110 7 7 18,421 3,787 1,964 31 22 2 109 0.016 111 10 10 26,316 5,410 2,805 45 32 3 156 0.023 112 11 11 28,947 5,951 3,086 49 35 3 171 0.026 113 9 9 23,684 4,869 2,525 40 29 2 140 0.021 114 8 8 21,053 4,328 2,244 36 25 2 125 0.019 115 8 8 21,053 4,328 2,244 36 25 2 125 0.019 116 10 10 26,316 5,410 2,805 45 32 3 156 0.023 117 11 11 28,947 5,951 3,086 49 35 3 171 0.026 118 6 6 15,789 3,246 1,683 27 19 2 93 0.014 119 8 8 21,053 4,328 2,244 36 25 2 125 0.019 120 10 10 26,316 5,410 2,805 45 32 3 156 0.023 121 7 7 18,421 3,787 1,964 31 22 2 109 0.016 122 9 9 23,684 4,869 2,525 40 29 2 140 0.021 123 9 9 23,684 4,869 2,525 40 29 2 140 0.021 124 12 12 31,579 6,492 3,366 54 38 3 187 0.028 4 of 5

EP Rx 125 2" 4" Pipe TBD 06-004 Group 2 Measurement #

Co-60 activity Co-60 activity Cs-137 activity Eu-152 activity Eu-154 activity Nb-94 activity Ag-108m activity gcpm ncpm (total dpm) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2) (dpm/100cm2)

Unity 125 6 6 15,789 3,246 1,683 27 19 2 93 0.014 126 8 8 21,053 4,328 2,244 36 25 2 125 0.019 127 8 8 21,053 4,328 2,244 36 25 2 125 0.019 MEAN 0.016 MEDIAN 0.015 STD DEV 0.006 MAX 0.036 MIN 0.002 5 of 5

SECTION 7 ATTACHMENT 2

/o PAGE(S)

BSI/LVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: 7 .d(P Time: /as0 Pipe ID#: P$ Pipe Diameter: ~r " Access Point Area: - I T f L . 7 2 . ; ~ &,-;,\;

Building: 'p.f n-=.~'% Elevation: - I '5 System: .- 15&- p ~ &J Type of S w e y Investigation Characterization Final Survey $ Other J Gross C06O J Cs Detector ID# I Sled ID# a , . c ~ o r/H6/- ~ d 5 1- / 10)

Detector Cal Date: m +L 0 < Detector Cal Due Date. t o -b - cc, nL Instrument: 2350 - I Instrument ID #: *SqYY Instrument Cal Date: I 7-do./ - a C Instrument Cal Due Date: / 7,' ,-&Q # - 0 From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value / 3 cpm MDCILtat,, /a' cpm Efficiency Factor for Pipe Diameter D. DW5Z (from detector efficiency determination) mcslatE 1557 dpm/ 03 cm2 Is the MDCSbacacceptable? NO (Lfno, adjust sample count tlme and recalculate MDCR,,,,,)

Technician Signature Pipe Interior Radiological Survey Package Page 1 of Attachment 3, Page 1

BSILVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form)

Date: a-17-dL Pipe ID#: RA Iss Pipe Diameter: 4 ' Access Point Area:, -I>- Fa,<fs 3h 4 j H Building: y e d c r c s 4 Elevation: -)5 System:

Package Page 2of 2 REFERENCE COPY Attachment 3, Page 2

BSVLVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form)

Date: &+I,/:, -6 b Pipe ID#: nx 1 ~5 Pipe Diameter: 4'( Access Point Area: *-l( >?;J Building: Qshcfot. Elevation: - 15 System:

Package Page 2of -$

REFERENCE COPY Attachment 3, Page 2

BSI/LVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: a ? ~ /L d Time: 0 ti-/( 41J6 Pipe ID#: ..d / 2 .< Pipe Diameter: '2- Access Point Area:

N& ~ . c I I P I s O .-IF

~.

Building: Elevation: - / ,\

/

System: - IY (

%k,4,-+ LZ-0 e 3~~;,-3 E

Type of Survey Investigation Characterization Final Survey Other J Gross Co60 '4 Cs Detector ID# I Sled ID# qyrbz / 2fa74f I$/

Detector Cal Date: 1 7 -&d,#$ Detector Cal Due Date: 1 7 , /(/uq -0 6 Instrument: A3G - I Instrument ID #: p [a-3 Instmment Cal Date: 17- @* u 0 Instrument Cal Due Date: 17 ,A d d - 6 L From the Daily Pipe Survey ~ e t e k 8Control r Form for the Selected Detector Background Value 573 cpm M D C R ~ ~ ~ ~/a ~ 4 cpm Efficiency Factor for Pipe Diameter (3 0003 (from detector efficiency determination)

MDCsucx u3' w I ~ cm D 2 Is the MDCsaUcacceptable? Yes No ( ~no, f adjust sample count tune and recalculate MDCkU,,)

Comments: Cr+gr7'& WF,'O d S u +J c-/

/7,~fi-;ofJ / =A4 10 2<'p i r e l d d J Yr' u ; ~ f 5 ' I / &R u Z"PS+E 4E & $" L,>P Technician Signature Pipe Interior Radiological Survey Package Page 1 of 3 REFERENCE COPY

, .,,.:,.:.,: .:,<:;,;<:v"

. .~..

r. Attachment 3, Page 1

BSVLVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form)

Date: P C$ 1 .C C &E d@-+'a Pipe ID#:

Building:

2 x ><

R X Pipe Diameter:

Elevation: - -

1 0 3 ~

(2 Access Point Area:

System:

-16 & & t + ~ ; u <

-I$ f~~+&:d Package Page 2of - 3 REFERENCE COP Attachment 3, Page 2

BSULVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: 3. & - fi 6 Time: /b /5-

& / 2-S 5 Pipe ID#:

Building: A, Pipe Diameter:

Elevation: - /S Jf Access Point Area:

System:

-1 5- j)re,-d

• OII 3w.d Type of Survey Investigation Characterization Final Survey )( Other Gross C06O 4 Cs Detector ID# I Sled ID# 4f- 1 9 / 2/59<7 1 K46' 52-50 Detector Cal Date: - - F a 0 L Detector Cal Due Date: p - .fE6 - 07 Instrument: ,235- - I Instrument ID #: 2/2223 Instrument Cal Date: 7 - d -J - Instrument Cal Due Date: /7 - N G v - ~ ~

From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value // cpm MDCILjhtlc /3<y CPm Efficiency Factor for Pipe Diameter 0. 00038 (from detector efficiency determination)

'5 4 3 MDC,,,,

Is the MDCNui aic:table?

Comments:

a dpd I tQ No

@ ~ * / j i ~ ; c u s i ;

• O ~ S*AJC~

cm2 (Ifno, adjust sample count hme and recalculate M D G c )

Technician Signature Pipe Interior Radiological Survey Package Page 1 of 2 Attachment 3, Page 1

BSIILVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form)

Pipe ID#: 7~ j S Pipe Diameter: gr'

- Access Point Area: .-IS &.+;l Building: > Elevation: -IS System: b ~ dl ;

Package page 2o f 3 REFERENCE COP Attachment 3, Page 2

SECTION 7 ATTACHMENT 3 PAGE(S)

Page 1 a f 1 SECTION 7 ATTACHMENT 4 1 DISC