ML081270695
| ML081270695 | |
| Person / Time | |
|---|---|
| Site: | Plum Brook File:National Aeronautics and Space Administration icon.png |
| Issue date: | 05/01/2008 |
| From: | US National Aeronautics & Space Admin (NASA), John H. Glenn Research Ctr at Lewis Field |
| To: | NRC/RGN-III/DNMS/DB |
| References | |
| EP-PPH 104 | |
| Download: ML081270695 (13) | |
Text
Survey Unit Release Record Design #
EP-PPH 104 Revision #
Original Page 1 of 3 Survey Unit #(s)
PPH 104 Description
- 1) Embedded Pipe (EP) Survey Unit PPH 104 meets the defmition of embedded pipe for Plum Brook Reactor Facility (PBRF) for those portions of piping embedded in the building foundation walls (PPH ). The portion of piping which transits in soil under or between buildings does not meet the criteria for embedded piping. The complete piping will be grouted, the portions embedded in the building structure will remain embedded for any future reuse, those portions in the ground can be released for unrestricted use.
- 2) EP PPH 104 is a Class 1, Group 1 survey unit as per the PBRF Final Status Survey Plan (FSSP) and Technical Basis Document (TBD)-06-004.
- 3) Surveys in EP PPH 104 were performed using a scintillation detector optimized to measure gamma energies representative of Co-60. Sample #EP 3-7 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 (lAW) 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.
- 5) Instrument efficiency determinations are developed in accordance with the BSI/LVS-002, WEP 05-006, these detenninations are appropriate for the types of radiation involved and the media being surveyed.
Approval Signatures Date:
FSS/Characterization Engineer FSS/Characterization Manager
/f
- 'll// t' R. Case /7/V~
Fonn CS-09/1 Rev 0
---~---~--.----
FSS Design # EP PPH 104 I Revision # Original Page 2 of3 Survey Unit: PPH 104 1.0 HistorylDescription 1.1 The subject pipe is an 8" DI water line from PPH Room 4 to the RB -15' level (Cold Pipe Tunnel).
1.2 EP PPH 104 consists of 8" diameter piping that is approximately 24 feet in length.
2.0 Survey Design Infonnation 2.1 EP PPH 104 was surveyed lAW Procedure #BSI/LVS-002.
2.2 100% of the 8" pipe was accessible for survey. The accessible 8" pipe was surveyed by static measurement at one foot increments, for a total of 24 survey measurements.
2.3 Surface area for the 8" piping is 1946 cm2 for each foot of piping, 2
corresponding to a total 8" piping surface area of 46704 cm (4.7 m2) for the entire length of (approximately 24') of 8" piping.
3.0 Survey Unit Measurement LocationslData 3.1 Pipe interior radiological survey fonns are provided in Attachment 2 of this release record.
4.0 Survey Unit InvestigationslResults 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPlBuried Pipe (BP) Survey Report provided in Attachment 1.
5.2 This survey unit was assessed as a building re-use scenario with all activity derived dose as a 100% C060 nuclide distribution. This is the most conservative DCGL for the facility (11,000dpm/l 00cm2).
5.3 When implementing th Unity Rul8, provid8d in S@ction 3.6.3 of the FSSP, four survey measurements exceeded unity. The survey unit that is constituted by EP PPH 104 passes FSS after application of Elevated Measurement Comparisons (EMC) and Elevated Measurement Tests (EMT). The EMC Unity sum was 0.027 of unity, and the EMT Unity sum was 0.575 of unity.
5.4 DCGL's for the building reuse scenario are used to demonstrate compliance with the releas'e criterion for this release record. The DCGL's for embedded pipe are not applied, therefore the Structural Area Factors listed in Table 3-5 of the FSS are the appropriate area factors for EMC and EMT evaluations.
5.5 The area factor of 40.2 was utilized for this survey unit, this is the appropriate area factor listed in Table 3-5 of the PBRF FSSP.
FSS Design # EP PPH 104 I Revision # Original Page 3 of3 I
Survey Unit: PPH 104 5.6 Background was not subtracted from the survey measurements.
5.7 Statistical Summary Table 8"
Statistical Parameter I
Pipe Total Number of Survey Measurements 24 Number of Measurements >MDC 24 Number of Measurements Above 50% of DCGL 14 Number of Measurements Above DCGL 1
Mean 0.542 Median 0.526 Standard Deviation 0.151 Maximum 1.099 Minimum 0.368 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 ofthe survey results has shown that the dose contribution for EP PPH 104 to be less than 25 mrem/yr. The dose contribution is estimated to be 13.55 mrem/yr based on the average of the actual gross counts measured.
7.0 Attachments - BSI EPIBP Survey Report - Pipe Interior Radiological Survey Form - DQA Worksheet - EP PPH 104 SURR & Spreadsheet Disc
SECTION 7 ATTACHMENT 1 2 PAGES
I Pf U VEY PORT Pipe 10 PPH 104 Survey Location PPH RM.. to RB-1S' (CPT)
Survey Date 21-Mar~8 2350-1 #
189094 1---
Survey Time 1550 Detector-Sled #
B577A-108 Pipe Size 8"
Detector Efficiency 0.0069 DCGl(cfpIr.I1oo_1 1 10E+04
~ l\\,n In............" by D".etor ElIi<1utcy {in -1 1946 Pipt A....a lncorp~.d by 4.7 Field BKG (<pm)
See Survey Sheets
§Y'Y'Y Oar:~ (mJ'1 Routine Survey X
Field MDCR,-,
See Survey Sheets QA Survey Nominal MDC (oIpWtDlca2l 221 Survey Measurement Results Total Number of Survey Measurements 24 Number of Measurements >MDC 24 Number of Measurements Above 50% DCGL 14 Number of Measurements Above DCGL 1
Mean 0.542 Median 0526 Standard Deviation 0.151 Maximum 1.099 Minimum 0.368 PHELPS Survey Technician(s)
SlIl'Vey Umt Classrficatlon 1
TBD 06--004 Piping Group 1
SR-13 Radionuclide Distribution Sample 3-7 Measured Nuclide CD-60 Area FactorlEMC Used Yes PasslFail FSS Pass MREMIYR Contribution
<25 COMMENTS:
ACTIVITY VALUES NOT BACKGROUND CORRECTED.
RP Engineer I Date vllAlJ/.5- / DJ' 7?'
PPH 104 8" Pipe TBD 06-004 Group 1
- u:-
c: I CII E
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III gcpm ncpm Co-60 activity (total dpm)
Co-60 activity (dpm/100cm2)
Unity EMC Unity EMT Unity eu CII
~
1 598 598 86,667 I 4,454 0.405 0.405 2
574 574 83,188 4,275 0.389 0.389 3
544 544 78,841 4,051 0.368 0.368 4
825 825 119,565 6,144 0.559 0.559 5
938 938 135,942 6,986 0.635 0.635 6
900 900 130,435 6,703 0.609 0.609 7
1062 1062 153,913 7,909 0.719 0.719 8
942 942 136,522 7,016 0.638 0.638 9
814 814 117,971 6,062 0.551 0.551 10 857 857 124,203 8,382 0.580 0.580 11 775 775 112,319 5,772 0.525 0.525 12 777 777 112,609 5,787 0.526 0.526 13 723 723 104,783 5,385 0.490 0.490 14 777 777 112,609 5,787 0.526 0.526
-+~
660 638 680 638 98,551 92,464 5,064 4,751 0.460 0.432 0.460 0.432 17 676 676 97,971 5,034 0.458 0.458 18 793 793 114,928 5,906 0.537 0.537 19 698 698 101,159 5,198 0.473 0.473 20 637 637 92,319 4,744 0.431 0.431 21 573 573 83,043 4,267 0.388 0.388 0.057 22 1623 1623 235,217 12,087 1.099 I
0.027 23 806 806 116,812 6,003 I 0.546 0.546 24 993 993 143,913 7,395 0.672 0.672 5,162 0.027 0.575 MEAN 0.542 EMC Unity EMT Unity MEDIAN 0.526 STD DEV 0.151 MAX 1.099 MIN 0.368 1 of 1
SECTION 7 AT ACHMENT2 3 PAGES
BSIJLVSPipeCrawler-002 Revision 5 Pipe Interior Radiological Survey Form Date:)' 17.,Og Time:
IS'S 0 Pipe ID#: PPHIt) 1 Pipe Diameter: __-=;:8::-'
Access Point Area: fff! Rrv1 J-j Building~=Ff2'dj!,"d,Jl~..=.=.==="'.-....;!E:=:l:;;:.ey;;.;.a~ti~og~:'-._~=~f2~=~="'__S~:Y.ste~,
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Type of Survey Investigation Characterization Final Survey A Other v
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I Gross Co60 v' Cs Detector 1I,)# I Sled ID#
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Detector Can Date:
(-dS, C) If Detector Cal Due Date:
I',;;.5 '0 r Instnirntnt:
a3 S-o - I Instrument ID #:
d- () 3 c.(3d:
Instrument Cal Date: -'-1-"-0_,--'-1-'-[._*_0......:.7 Instrument Cal Due Date:
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From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value
- 86. b cpm MDCRstatic 35 cpm
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Efficiency Factorfor Pipe Diameter
-0 i GQO ~ (from detector efficiency determination) 2 wIDCstatic Z z..l dprn/
{ DV cm Is the MDCstatic acceptable? ~ No (if no, adjust sample count time and recalculate MDCR,tahc)
Comments:
Technician Signature Pipe Interior Radiological Survey Position Feet into Pipe Count Time Gross Counts Gross from Opening (min) cpm 1
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Date:
3-d7-00 c;J{t' Pipe ID#: -LP-=-'-p=-"-H.:....-J,.{--=-(J_t('-----_ Pipe Diameter: __0=-=--
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SECTION 7 A
ACHM-N 3 1 PAGE
DQA Check Sheet Design #
EP PPH-104 I Revision # I Original I
I Survey Unit #
EP PPH-104 Preliminary Data Review' Answers to the following questions should be fully documented in the Survey Unit Release Record
- 1.
Have surveys been performed in accordance with survey instructions in the Survey Design?
- 2.
Is the instrumentation MDC for structure static measurements below the DCGLw for Class 1 and 2 survey units, or below 0.5 DCGLw for Class 3 survey units?
- 3. Is the instrumentation MDC for embeddedlburied piping static measurements below the DCGLw?
- 4.
Was the instrumentation MDC for structure scan measurements, soil scan measurements, and embedded/buried piping scan measurements below the DCGLw. or, if not, was the need for additional static measurements or soil samples addressed in the survey design?
- 5.
Was the instrumentation MDC for volumetric measurements and smear analysis < 10% DCGLw ?
- 6. Were the MDCs and assumptions used to develop them appropriate for the instruments and techniques used to perform the survey?
- 7.
Were the survey methods used to collect data proper for the types of radiation involved and for the media being surveyed?
- 8.
Were "Special Methods" for data collection properly applied for the survey unit under review?
- 9.
Is the data set comprised of qualified measurement results collected in accordance with the survey design, which accurately reflects the radiological status of the facility?
Graphical Data Review
- 1.
Has a posting plot been created?
- 2. Has a histogram (or other frequency plot) been created?
- 3.
Have other graphical data tools been created to assist in analyzing the data?
Data Analysis
- 1.
Are all sample measurements below the DCGLw (Class 1 & 2), or 0.5 DCGLw (Class 3)?
- 2.
Is the mean of the sample data < DCGLw?
- 3.
If elevated areas have been identified by scans and/or sampling, is the average activity in each elevated area < DCGLEMC (Class 1), < DCGLw (Class 2), or <0.5 DCGLw (Class 3)?
- 4.
Is the result of the Elevated Measurements Test < 1.0?
- 5.
Is the result of the statistical test (5+ for Sign Test or W, for WRS Test) ~ the critical value?
Comments:
See Section 5 of this Survey Unit Release Record I
Yes No N/A X
X X
X X
X X
X X
X X
X X
X X
X X
R.case Date FSS/Characterization Engineer (print/sign)
Date FSSI Characterization Manager (print/sign)
Page 1 of 1 Form CS-09/2 Rev 0
SECTION 7 A 'fACHMENT 4 1 DiSC