ML073400143
| 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 #(s) Survey Unit Release Record Description
- 1) Embedded Pipe (EP)
Survey Unit Rx 125 meets the defmition of embedded pipe for Plum Brook Reactor Facility (PBRF). Design # 2) EP Rx 125 is a Class 1, Group 2 survey unit as per the PBRF Final Status Survey Plan (FSSP) and Technical Basis Document (TBD)-06-004.
Original 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.
EP-Rx 125 Page 1 of 3 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 document constitute "Special Methods" and the survey design used in the acquisition of survey measurements.
Revision # 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.
FSSICharacterization Manager Approval Signatures Date:
FSS Design # EP Rx 125 Revisi on # Original Page 2 of 3 Survey Unit: Rx 125 1.0 History/Description 1.1 The subject pipe system is a combina tion 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 cm 2 (9.5 m 2) for the entire length of (approxima tely 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 specif ic 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 Frac tion (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 Revisi on # Original Page 3 of 3 Survey Unit: Rx 125 5.5 Statistical Summary Table Statistical Parameter 2", 4" 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 aggregat e 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 Measurements Above DCGL Minimum Survey Technician@)
TBD 06004 Piping Group SR-13 Radionuclide Distribution Sample Measured Nuclide Area FadorIEMC Used PassIFail FSS MREMNR Contribution 2 EP 2-4 C0-60 No Pass <I COMMENTS:
ACTIVIN VALUES NOT BACKGROUND CORRECTED RP Engineer I Date //- 27 EP Rx 125 2" 4" Pipe TBD 06-004 Group 2 Measurement #gcpmncpm Co-60 activity (total dpm)
Co-60 activity (dpm/100cm2)
Cs-137 activity (dpm/100cm2)
Eu-152 activity (dpm/100cm2)
Eu-154 activity (dpm/100cm2)
Nb-94 activity (dpm/100cm2)
Ag-108m activity (dpm/100cm2)
Unity1151528,846 2,965 1,537 25 17 1 85 0.0132101019,231 1,977 1,025 16 12 1 57 0.0093212140,385 4,151 2,152 34 24 2 119 0.0184151528,846 2,965 1,537 25 17 1 85 0.0135171732,692 3,360 1,742 28 20 2 97 0.01569917,308 1,779 922 15 10 1 51 0.00879917,308 1,779 922 15 10 1 51 0.0088101019,231 1,977 1,025 16 12 1 57 0.00996611,538 1,186 615 10 7 1 34 0.00510151528,846 2,965 1,537 25 17 1 85 0.01311181834,615 3,558 1,845 30 21 2 102 0.01512171732,692 3,360 1,742 28 20 2 97 0.01513121223,077 2,372 1,230 20 14 1 68 0.01014111121,154 2,174 1,127 18 13 1 63 0.00915131325,000 2,570 1,332 21 15 1 74 0.01116161630,769 3,163 1,640 26 19 2 91 0.01417101019,231 1,977 1,025 16 12 1 57 0.00918131325,000 2,570 1,332 21 15 1 74 0.01119171732,692 3,360 1,742 28 20 2 97 0.01520131325,000 2,570 1,332 21 15 1 74 0.01121111121,154 2,174 1,127 18 13 1 63 0.00922111121,154 2,174 1,127 18 13 1 63 0.00923101019,231 1,977 1,025 16 12 1 57 0.00924171732,692 3,360 1,742 28 20 2 97 0.01525101019,231 1,977 1,025 16 12 1 57 0.00926101019,231 1,977 1,025 16 12 1 57 0.00927222242,308 4,349 2,255 36 25 2 125 0.01928161630,769 3,163 1,640 26 19 2 91 0.01429171732,692 3,360 1,742 28 20 2 97 0.01530161630,769 3,163 1,640 26 19 2 91 0.01431101019,231 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 #gcpmncpm Co-60 activity (total dpm)
Co-60 activity (dpm/100cm2)
Cs-137 activity (dpm/100cm2)
Eu-152 activity (dpm/100cm2)
Eu-154 activity (dpm/100cm2)
Nb-94 activity (dpm/100cm2)
Ag-108m activity (dpm/100cm2)
Unity32141426,923 2,767 1,435 23 16 1 80 0.01233161630,769 3,163 1,640 26 19 2 91 0.01434131325,000 2,570 1,332 21 15 1 74 0.01135141426,923 2,767 1,435 23 16 1 80 0.01236222242,308 4,349 2,255 36 25 2 125 0.01937151528,846 2,965 1,537 25 17 1 85 0.01338202038,462 3,953 2,050 33 23 2 114 0.01739121223,077 2,372 1,230 20 14 1 68 0.01040181834,615 3,558 1,845 30 21 2 102 0.01541161630,769 3,163 1,640 26 19 2 91 0.01442121223,077 2,372 1,230 20 14 1 68 0.01043242446,154 4,744 2,460 39 28 2 137 0.02144131325,000 2,570 1,332 21 15 1 74 0.01145101019,231 1,977 1,025 16 12 1 57 0.00946272751,923 5,337 2,767 44 31 3 154 0.02347222242,308 4,349 2,255 36 25 2 125 0.01948111121,154 2,174 1,127 18 13 1 63 0.00949171732,692 3,360 1,742 28 20 2 97 0.01550191936,538 3,756 1,947 31 22 2 108 0.01651252548,077 4,942 2,562 41 29 2 142 0.02152151528,846 2,965 1,537 25 17 1 85 0.01353121223,077 2,372 1,230 20 14 1 68 0.01054121223,077 2,372 1,230 20 14 1 68 0.01055181834,615 3,558 1,845 30 21 2 102 0.01556191936,538 3,756 1,947 31 22 2 108 0.01657181834,615 3,558 1,845 30 21 2 102 0.01558212140,385 4,151 2,152 34 24 2 119 0.01859323261,538 6,325 3,280 52 37 3 182 0.02760222242,308 4,349 2,255 36 25 2 125 0.01961121223,077 2,372 1,230 20 14 1 68 0.01062222242,308 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 #gcpmncpm Co-60 activity (total dpm)
Co-60 activity (dpm/100cm2)
Cs-137 activity (dpm/100cm2)
Eu-152 activity (dpm/100cm2)
Eu-154 activity (dpm/100cm2)
Nb-94 activity (dpm/100cm2)
Ag-108m activity (dpm/100cm2)
Unity63232344,231 4,546 2,357 38 27 2 131 0.02064262650,000 5,139 2,665 43 30 3 148 0.02265191936,538 3,756 1,947 31 22 2 108 0.01666202038,462 3,953 2,050 33 23 2 114 0.017679917,308 1,779 922 15 10 1 51 0.00868161630,769 3,163 1,640 26 19 2 91 0.01469121223,077 2,372 1,230 20 14 1 68 0.010705525,000 5,139 2,665 43 30 3 148 0.022712210,000 2,056 1,066 17 12 1 59 0.009724.54.522,500 4,625 2,398 38 27 2 133 0.020733.53.517,500 3,598 1,865 30 21 2 104 0.016745.55.527,500 5,653 2,931 47 33 3 163 0.025755.55.527,500 5,653 2,931 47 33 3 163 0.025762.52.512,500 2,570 1,332 21 15 1 74 0.011775525,000 5,139 2,665 43 30 3 148 0.022783315,000 3,084 1,599 26 18 2 89 0.013794420,000 4,112 2,132 34 24 2 118 0.018803315,000 3,084 1,599 26 18 2 89 0.013818840,000 8,223 4,264 68 48 4 237 0.036825.55.527,500 5,653 2,931 47 33 3 163 0.025837735,000 7,195 3,731 60 42 4 207 0.031842.52.512,500 2,570 1,332 21 15 1 74 0.011853315,000 3,084 1,599 26 18 2 89 0.013864.54.522,500 4,625 2,398 38 27 2 133 0.020874420,000 4,112 2,132 34 24 2 118 0.018882210,000 2,056 1,066 17 12 1 59 0.009895525,000 5,139 2,665 43 30 3 148 0.022903.53.517,500 3,598 1,865 30 21 2 104 0.016912.52.512,500 2,570 1,332 21 15 1 74 0.011926.56.532,500 6,681 3,464 55 39 3 192 0.029935.55.527,500 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 #gcpmncpm Co-60 activity (total dpm)
Co-60 activity (dpm/100cm2)
Cs-137 activity (dpm/100cm2)
Eu-152 activity (dpm/100cm2)
Eu-154 activity (dpm/100cm2)
Nb-94 activity (dpm/100cm2)
Ag-108m activity (dpm/100cm2)
Unity944.54.522,500 4,625 2,398 38 27 2 133 0.020952.52.512,500 2,570 1,332 21 15 1 74 0.011963.53.517,500 3,598 1,865 30 21 2 104 0.016973315,000 3,084 1,599 26 18 2 89 0.013984.54.522,500 4,625 2,398 38 27 2 133 0.020993315,000 3,084 1,599 26 18 2 89 0.0131004420,000 4,112 2,132 34 24 2 118 0.0181014420,000 4,112 2,132 34 24 2 118 0.0181024.54.522,500 4,625 2,398 38 27 2 133 0.0201035525,000 5,139 2,665 43 30 3 148 0.022104112,632 541 281 4 3 0 16 0.002105111128,947 5,951 3,086 49 35 3 171 0.026106121231,579 6,492 3,366 54 38 3 187 0.028107121231,579 6,492 3,366 54 38 3 187 0.0281087718,421 3,787 1,964 31 22 2 109 0.0161098821,053 4,328 2,244 36 25 2 125 0.0191107718,421 3,787 1,964 31 22 2 109 0.016111101026,316 5,410 2,805 45 32 3 156 0.023112111128,947 5,951 3,086 49 35 3 171 0.0261139923,684 4,869 2,525 40 29 2 140 0.0211148821,053 4,328 2,244 36 25 2 125 0.0191158821,053 4,328 2,244 36 25 2 125 0.019116101026,316 5,410 2,805 45 32 3 156 0.023117111128,947 5,951 3,086 49 35 3 171 0.0261186615,789 3,246 1,683 27 19 2 93 0.0141198821,053 4,328 2,244 36 25 2 125 0.019120101026,316 5,410 2,805 45 32 3 156 0.0231217718,421 3,787 1,964 31 22 2 109 0.0161229923,684 4,869 2,525 40 29 2 140 0.0211239923,684 4,869 2,525 40 29 2 140 0.021124121231,579 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 #gcpmncpm Co-60 activity (total dpm)
Co-60 activity (dpm/100cm2)
Cs-137 activity (dpm/100cm2)
Eu-152 activity (dpm/100cm2)
Eu-154 activity (dpm/100cm2)
Nb-94 activity (dpm/100cm2)
Ag-108m activity (dpm/100cm2)
Unity1256615,789 3,246 1,683 27 19 2 93 0.0141268821,053 4,328 2,244 36 25 2 125 0.0191278821,053 4,328 2,244 36 25 2 125 0.019MEAN0.016MEDIAN0.015 STD DEV0.006 MAX0.036MIN0.002 5 of 5 SECTION 7 ATTACHMENT 2 /o PAGE(S)
Pipe Interior Radiological Survey Form BSI/LVSPipeCrawler-002 Revision 4 Date: 7 .d(P Time: /as0 Pipe ID#: P$ Pipe Diameter:
~r " Access Point Area: - I TfL.72.;~
&,-;,\; Building:
'p.f n-=.~'% Elevation: -I 5' System: .- 15 &- p~& J Type of Swey Investigation Characterization Final Survey
$ Other J Gross C06O J Cs Detector ID#
I Sled ID# a,.c~or /H6/- ~d5- 1 / 10) Detector Cal Date: m - 3 +L - 0 < Detector Cal Due Date. to - b cc, - n L 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 MDCSbac acceptable?
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-d L Pipe ID#: RA Iss Pipe Diameter:
4' Access Point Area:, -I>- Fa,<fs 3 h4jH Building:
yedcrcs4 Elevation:
-)5 System: Package Page 2 of 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:
Qshcf'ot.
Elevation: - 15 System: REFERENCE COPY Package Page 2 of -$ Attachment 3, Page 2
BSI/LVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: a?~/d L Time: 0 ti-/( 41J6 '2- N& ~.cIIPIsO~.
.-IF Pipe ID#: ..d / 2 .< Pipe Diameter:
Access Point Area: %k,4,-+ LZ-0 E Building:
Elevation: - / ,\ System: - IY (e 3~~;,-3 / Type of Survey Investigation Characterization Final Survey Other J Gross Co60 4' Cs Detector ID# I Sled ID# qyrbz / 2fa74f I$/ Detector Cal Date: 17- &d,#$ Detector Cal Due Date:
17, /(/uq -0 6 Instrument:
A3G - I Instrument ID #: p [a-3 Instmment Cal Date: 17- @* u 0 Instrument Cal Due Date: 17 , Add- 6 L From the Daily Pipe Survey ~etek8r Control Form for the Selected Detector Background Value 573 cpm MDCR~~~~~
/a 4 cpm Efficiency Factor for Pipe Diameter (3 0003 (from detector efficiency determination)
MDCsucx u3' w I~D cm 2 Is the MDCsaUc acceptable?
Yes No (~f no, adjust sample count tune and recalculate MDCkU,,) Comments:
Cr+gr7'& WF,'O d Su +J c-/ /7,~fi-;ofJ
/ =A4 10 2<' pire ldd J Yr' u;~f 5' I/ &R u Z"PS+E 4 E & $" L,>P Technician Signature Pipe Interior Radiological Survey REFERENCE COPY , . . ~.. r.,:,. .,. :.,: .:,<:;,;<:v" Package Page 1 of 3 Attachment 3, Page 1 BSVLVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form) Date: PC $1 .C C &E d@-+'a Pipe ID#: 2 x , >< Pipe Diameter:
103~ Access Point Area: -16 &&t+~;u< RX Elevation: - Building: - (2 System: -I$ f~~+&:d 3 Package Page 2 of - REFERENCE COP Attachment 3, Page 2
BSULVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: 3. & - fi 6 Time: /b /5- Pipe ID#: & / 2-S Pipe Diameter:
'5' Jf Access Point Area: -1 5- j)re,-d Building:
A, Elevation: - /S System: *OII 3w.d Type of Survey Investigation Characterization Final Survey )( Other Gross C06O 4 Cs Detector ID# I Sled ID# 4f- 19 / 2/59<7 1 K46' 52-50 Detector Cal Date: - Fa - 0 L Detector Cal Due Date: p - .fE6 - 0 7 Instrument:
,235- - I Instrument ID #: 2/2223 Instrument Cal Date: 7 - d - J- Instrument Cal Due Date: /7 -NGv-~~ 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)
MDC,,,, '5 43 dpd I tQ cm2 Is the MDCNui aic:table?
a No (Ifno, adjust sample count hme and recalculate MDGc) Comments:
@~*/ji~;cusi;*O~
S*AJC~ 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~ jS Pipe Diameter:
gr' Access Point Area: .-IS &.+;l Building:
> Elevation: - -IS System: b~; dl REFERENCE COP Package page 2 of3 Attachment 3, Page 2
SECTION 7 ATTACHMENT 3 PAGE(S)
Page 1 af 1 SECTION 7 ATTACHMENT 4 1 DISC