ML073110357
| ML073110357 | |
| Person / Time | |
|---|---|
| Site: | Plum Brook |
| Issue date: | 11/06/2007 |
| From: | US National Aeronautics & Space Admin (NASA) |
| To: | NRC/RGN-III/DNMS/DB |
| References | |
| EP-Rx 1.33 | |
| Download: ML073110357 (17) | |
Text
Swvey Unit Release Record EP-Rx 1.33 Revision # Original Page 1 of 3 Surrey Unit #(#) Rx 1.33
- 1) Embedded Pipe (EP)Survey Unit Rx 1.33 meets the definition of embedded pipe for Plum Brook Reactor Facility (PBRF).
- 2) EP Rx 1.3 3 is a. Class 1, Group 2 survey unit as per the PBRF Find Status S w e y Plan (FSSP) and Technical Basis Document (TBD)-06404.
- 3) Surveys in EP Rx 1.33 were performed using a scintillationdetector optimized to measwe gamma energies representative of&-60. Sample #ElP2-5 h r n Survey Request (SR)-13 was referenced for this decision.
- 4) Survey Instructions for this survey unit are inco& into and performed in a c c o with ~ (TAW) the Babcock Services Incorporated @SzYr,VS-OW, Work E m o n Package (WEP)05-006. Survey hrmtiolls described in this document constitute "Specid Methodsn d the survey design used in the acquisition of survey measurements.
5 ) Instrument efficiency determinations are developed in accordance with the BSKVS-002, WEP 05-006, t h e detemhations are appropriate for the types of radiation involved and the media being surveyed.
Approval Signatures Date:
FSS/Charactebtiot1 Engineer CS-0911
- LC FSS Design # EP Rx 1.33 Revision # Original Page 2 of 3 Survey Unit: Rx 1.33 1.0 ~oryIDescription 1.1 The subject pipe system is the 3" s p a line running through Quad D to the Sub Pile Room.
1.2 EP Rx 1-33 consists of 3" diameter piping that is approximately 29 feet in length.
2.0 Survey Design Wormation 2.1 EP Rx 1.33 was surveyed IAW Procsdure #BSYLVS-002.
2.2 1W/oof the 3" ID pipe w a s accesaibIe for mwey. The m i b l e 3" ID pipe was surveyed by static measurement at one foot increments, for a total of29 survey measurements.
2.3 S&eareaforthe3"IDpipiogis730cm2foreachfootofpiping comesponding to a total 3' ID piping surbce srea of 2 1,160 cm2(2.1 rd) for the entire length of (approximately 29') of 3" piping..
3.0 S w e y Unit Measurement LacatioWata 3.1 Pipe interior radiologid survey forms are provided in Attachment 2 of this release record.
4.0 Survey Unit InvestigatiodResuIts 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPA3uie.d Pipe (BP) Survey Report provided in Attachment I .
5 -2 41measurement results are less than the Derived Concentration Guideline Level @CGL) for radionuclide specific EP that m p o n d s to the I W y r dose goal established in Table 3-3 of the FSSP.
5.3 When implement* the Unity Rule, provided in Section 3.6.3 of the FSSP, and applying the Nuclide Fraction @F), provided in TBD-QB-004, the survey unit ihat is constituted by EP Rx 1.33 passes FSS.
5.4 Background was not ~~ fiom the survey measurements and the Elevated Measurement Comparison @MC) was not employed h r this survey unit.
FSSDesign#EPRx 1,33 Revision # O&hd 1 P a p 3 of 3 Survey Unit: Rx 1.33 5 .$ Statistical Summary Table Number of MeasurementsSMOG 16 Plumber of MeasurementsAbwe 5096 of DCGL 0 Number of MeasurementsA b w DCGL 0 Mean -
0.0q20 Stmdard W i d o n 0.W136 Maximum 0.0215 Minknum ch0046
~~n of evaluations pertaining to compliance with the h c t e d use limit of25 mremlyr and dose mtributions h m Embedded Pipe and rudionuclides contributing 10% in aggregate ofthe total dose for both structural d o s and soils.
6.1 A review ofthe swey r e d t a has shown that the dose contribution for EP Rx E .33 to be lm than 1 mrem/yr. The dose contribution is estimated to be 0.012 m d y r based on the average of the actual gross counts measured.
Atmw Attdmmt 1 -BSI EPlsP Survey Report Attachment 2 -Pipe Intaior Radiologid Survey Form
-3 -DQAWorksbeet
&hdment 4 -Disc containing RR for EP Rx 1.33 & Spread&&
SECTION 7 ATTACHMENT l 3 PAGE@)
EP Rx I.33 3" Pipe TBD 06404 Group 2
SECTION 7 ATTACHMENT 2 6 PAGE(S)
' Pipe Interior Radiological Survey Form Date: 1-1 6-0 6 Time: /020 Building: Q Elevation -37 Access Point 9 ~ '
System: 5 Qaw~ t S)P R pipe Diameter: %T 1' Area:
&ea
( I 1 Type of Survey Investigation Characterization Sled Size & " 6' / N ~ L@ ~ L635 L inch Detector: YY-6 Z Detector ID #: 2 / ~ 7 8 / qd/&(-
Cal Date: //-I 7 - 0 ~ ~ Cal Due Date: I/-/ 7-Db Instrument: 3 .Fop( Instrument ID #: Z / Z Z Z ~
Cal Date: / 1-17-43J- Cal Due Date: //-/7-0 @
From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 5- cpm MD CRstatic qrV cpm Efficiency Factor for Pipe 0. 0 0 0 B (taken from detector V
WE:~: 2779 dpm/100cm2 Is the MDCsbtic @ NO (if no, adjust sample count time and recalculate MDCR,tatic)
~ d f f i ~ e t B k ? = ? ,J,r,14-L ~ U U W VOJH I - /y ~ ~ 4 b --l=dZcrm d sPK (-S W R fl~~<&@drn)
Pipe Interior Radiological Survey Radiological Survey Commenced: Date: / -/b -0b Time: / O Z0 Package Page 1 of Attachment 3, Page 1 REFERENCE COPY
Package Page 2of &
A'ttachment 3, Page 2
Pipe Interior Radiological Survey Form Date: /'/7--OGP Time: 0 ZOJ" Building: &\.c Elevation: -- Z,"5 Access Point Area: Qd# 0 13 V System: 5 Q,Gj+yy- 7-8 5 PE Pipe Diameter: e e : t h : r @Y /.+21 Type of Survey Investigation Characterization inal Survey . I Sled Size .3" rJ(NYL Q ~ U L G C ~ S/d Detector: YY-d; z Detector ID #: ,J,/27&/ /a/ -
Cal Date: //-17 -of Cal Due Date: / / V 7 -8 6 Instrument: 2 3 ~ 7 3 -/ Instrument ID #: z/ 2-ZZ 3 Cal Date: 1 / - / 7 -0 5- Cal Due Date: //-if 7 -0 6 From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value J(: 7 cpm MDCRsbtic I/, 3 CPm Efficiency Factor for Pipe Diameter 0.0- (taken from detector
='-
MDCstatic 2714 dpm/10ocm2 Is the MDCstaticacceptable?
Comments: CO a
r 1 Q K A U @ ~3, No (if no, adjust sample count time and recalculat'e MDCRSuti,)
- , ~ ( t 2 - d h/fl
~ Ohl /-I 6 -0 6 psr rc i - mad r-rz qu4-a D
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=c-Pipe Interior Radiological Survey Radiological Survey Commenced: Date: / -/.7- 0 Time: 0 Package Page 1 of Attachment 3, Page 1
Package Page 2-of L Attachment 3, Page 2
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SECTION 7 ATTACHMENT 3 1 PAGE(S)
DQA Check Sheet Design # Rx 1.33 Revision # Original Survey Unit # Rx 1.33 Preliminary Data Review' Answers to the following questions should be fully documented in the Survey Unit Release Record Yes No N,A
- 1. Have surveys been performed in accordance with survey instructions in the Survey Design? X
- 2. Is the instrumentation MDC for structure static measurements below the D C G h for Class 1 and 2 survey units, or below 0.5 D C G h for Class 3 survey units? X
- 3. Is the instrumentation MDC for ernbeddedlburied piping static measurements below the DCGLW? X
- 4. Was the instrumentation MDC for structure scan measurements, soil scan measurements, and embeddedlburied piping scan measurements below the DCGLw, or, if not, was the need for additional X static measurements or soil samples addressed in the survey design?
- 5. Was the instrumentation MDC for volumetric measurementsand smear analysis < 10% DCGLw ? X
- 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 X
media being surveyed?
- 8. Were "Special Methods" for data collection properly applied for the survey unit under review? X
- 9. Is the data set comprised of qualified measurement results collected in accordance with the survey X
design, which accurately reflects the radiological status of the facility3 Graphical Data Review I. Has a posting plot been created? X
- 2. Has a histogram (or other frequency plot) been created? X CS-0912 Page 1 of 1
SECTION 7 ATTACHMENT 4 1 DISC