ML073170418

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Survey Unit Release Record EP Rx 043
ML073170418
Person / Time
Site: Plum Brook
Issue date: 11/07/2007
From:
US National Aeronautics & Space Admin (NASA)
To:
NRC/RGN-III/DNMS/DB
References
EP Rx 043
Download: ML073170418 (17)
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Text

Survey Uait Release Record

-# EP-Rx 043 M i o n# Original Page 1 of 3 Survey Unit Ys) Rx 043

1) Embedded Pipe (EP) S w e y Unit Rx 043 meets the ddnition of embedded pipe for Plum Brook Reactor Facility (PBRF).
2) EP Rx 043 is a Class 1, Group 1 survey unit as per the PBRF Final Status Survey Plan (FSSP) and Technical Basis Document ( T B D ) - W .
3) Surveys in EP Rx 043 were performed using a scintil1ation detector optimized to measum m a energies representative of Co-60, Sample #lP3-1 from Survey Request ($It)- 13 w a s rderenced for this decision.
4) Survey Tnstmctions for this survey unit are incorporated into and performed in accordance with (IAW) the Bhcock Services Incorporated (BSWVS-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 ) hstnmmt efficiency determinations am developed in accordance with the BSVLVS-002, WEP 05-006, these d e t d a i i o n s are appropriate for the types of radiation involved tutd the media being surveyed.

1 FSS ~ e s i #~ EP n Rx 04; S m e y Unit: Rx u43 Revision # Original 1 Page 2 of 3 1.0 Historyfllescription 1.1 The subject pipe system is a 6" service ring return line located on the -27' d.of the Rx building.

1.2 EB Rx 043 consists of 6" diameter piping that is approximately 46 feet in length.

Survey Design Information 2.1 I3P Rx 043 was surveyed L4W Procedure #BSIA,VS-002.

2.2 100% of the 6" ID pipe was accessible for swrey. The accessible 6" ID pipe was sumeyed by static measurement at one foot increments, for a total of 46 survey rnamrements.

2.3 Surface area for the 6" II3 piping is 1,459 cm2for each foot of piping, compodhg to a total 6" a)piping surface area of 67,129 d(6.7m2) for the entire length of (appmximately 46') of 6" piping, Survey Unit Measurement LocationslData 3.1 Pipe interior radiologicd m e y forms are provided in Attachment 2 of this release record Survey Unit hvestigations/IlesuIts 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPBUtied Pipe (BP)Survey Report provided in Attachment 1.

5.2 MI measurement results are less than the Derived Concentration Guideline ZRVe1 W G L ) for radioauc6de s ~ e c 3 cEP #hatcofiespondsto the 1 mredyr 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 0, provided in T B D - W ,

the survey unit that is constituted by EP Rx 043 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 043 Revision # Original Page 3 of3 1 smey Unit: Rx 043 Statistical Parameter Documentation of evaluations pertaining to compliancewith the unrestricted use limit of25 mredyr and dose contributions from Embedded Pipe and r s d h W contributing 1WA in aggregate of the total dose for bdh struchval scenarios and soils.

6.1 A review ofthe survey results has shown that the dose contribution for EP Rx 043 to be Iess tbEm 1 m e d y r . The ~ O F Emntribution is estimated to be 0.049 mremlyr based on the average of tbe actual gross counts rnemured.

Amehments Attachment 1 -BSI E P B P Survey Report Attachment 2 - Pipe Interior Radiological Survey Form Attachment 3 -DQA Worksheet Attachment 4 -Disc containing RR for EP Rx 043 & Spreadsheet

SECTION 7 ATTACHMENT I 3 PAGE@)

I S 1 EPlbP SURVEY REPORT LUES HOT BACKGROUIUD CORRECTED

EP Rx 043 6" Plpe TBD 06-004 Group I

SECTION 7 ATTACHMENT 2 6 PAGE(S)

BSULVSPipeCrsrwler-002 Revision 4 Pipe Interior Radiological S u i ~ e yForm Date: 3*/3rd'd) Time: c 8- 5 0, ~ 3 ZX )

Pipe ID#:

Building: =&L Tfi I~J' pipe Diameter:

Elevation: - 4Zd '/

AccessPointArea:

System: \ J

'&7mF'm'~?f(

s t ~

  • k e ~ ~ ~

V Type of Survey Investigation Characterization Final Survey 7( Other 4 Gross Co60 V' I cs -

Detector ID#I Sled ID# /O b Detector Cal Date: / Cal Due Date: / 2- L 0 0 b Instrument: a332 - 1 Instrument ID #: $034Yti" Instrument Cal Date: /7 J- 0 3( Instrument Czll Due Date: / y - f k b J -& &

From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value ' a cpm rnCKtatiC f cpm Efficiency Factor for Pipe Diameter n.m a (from detector efficiency determination)

~ C s m i c 33123 k the MDCmtic accqtablc? (if no, ndjust sample count time and recalculate MDCR+tPric)

Comments:

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

BSVLVSPipeCrawler-002 Revision 4 Pipe ~nteribrRadiological Survey Form (Continuation Form)

Date: 2

  • pj Pjpc lP#: (/.+yj xx#fS Pipe Iliameter: 6./ { Access Point Area: eJ 7 T;ZK+jc a-Building: ' TJ,&m% Elevation: -- $5- System:

Attachmmt 3, Page 2

BSTLVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: 7-lgL - 0b Time: ?c $30 m d c g PipeID#: ( i t ~ 3 ) e Kfl3 PipeDiameter: b AccessPointArea: - io

({

Building: KJ? Elevation: -2 7 System: WICY s UCF ~TZZWZ d Type of S u m y Investigation - ,jharactaLaiion , FMSwey $ Other Gross ' Co60 cs * ,

Detector ID# 1 Sled ID# B)[@ohl [ N&/ /L VS-/ / 106 -

Detector Cal Dale: / a- Z d - Detector Cal Due Date: / 2-p 2. 0 0 6 -

Instrument: = S T - f Instnunent ID #: ZC=,3VB&3 Instrument CalDate: / /-/ 7-0 3- Instrument Cal Due Date: jf-/ 7 -Q 6 From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 21 3 . cpm MDCR,~, 1 9 4 cpm Eficiency Factor for Pipe Diameter 6 , 0 06% (from detector efficiency determination) mcstalic 3343 dpd 03 cm2 IS mcabtiG acceptable? @ NO (if no, adjust sample count time and recalculate M D C S d Technician Signature c.OCB i?&v/-

Pipe Interior Radiological Survey Package Page 1 of - 9 REFERENCE COPY Attachment 3, Page I

BSULVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form) me: 2 - 1 Y-06 Pipe ID#:c!,y3) a Y3 Pipe Diameter:

rl Access Point Area: mwff Bdd'zng: ..rC. Elevation: - 27 System: %\rILF &G& &C-ZKA~

Package Page ?"of /

0 REFERENCE COPY Attachment 3, Page 2

SECTION 7 ATTACHMENT 3 1 PAGE@)

DQA Check Sheet Design # Rx 043 Revision # Original survey Unit # Rx 043 Preliminary Data Review' Answers to the following questions should be fully documented in the Sumey Unit Yes No NIA Release Record

1. Have surveys been performed in accordance wRh survey instructions in the Survey Design? X
2. Is the instrumentation MDC for structure static measurements betow the DCGLw for Class Iand 2 X 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 ? X
4. Was the instrumentation MDC for structure scan measurements, soil scan measurements, and ernbeddedlburied piping scan measurements betow the DCGh, 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 measurements and smear analysis < 10% DCGLw ? X
6. Were the MDCs and assumptions used to develop them appropriate for the instruments and techniques used to perfom 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 'Speciai Methodsmfor 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 facility?

Graphical Data Review I I CS-09/2 Page 1 of 1

SECTION 7 ATTACHMENT 4 1 DISC

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