ML073110360

EP-RX 132, Nasa, Survey Unit Release Record

ML073110360
Person / Time
Site:	Plum Brook
Issue date:	10/31/2007
From:	US National Aeronautics & Space Admin (NASA)
To:	NRC/RGN-III/DNMS/DB
References
EP-RX 132
Download: ML073110360 (15)

Text

Suwey Unit Release Record Design # EP-Rx 132 Reviskn # Original Page 1 of 3 Suwey Unit #Is) Rx 132 I ) Embedded Pipe (EP) Survey Unit Rx 132 meets the definition of embedded pipe for Piurn Brook Reactor Facility (PBRF).

2)EPRx 132isaClass 1, GroupZsurveyunitztsperthePBRFFid S m s Survey Plan (FSSP) and Technical Basis Dawmmt (TBDyO6-004.

3) Surveys in EP Rx 132 were pdormed using a scintillation detector optimized to measure gamma energies repramtative ofCo-60. Sample #EPZ 5 from Survey Request (SR)-13 was referenced for this decision.

4) Survey Instructions for this survey unit are incorpmakd into and pdbrmed in accordance with (MW) the Babcock Services Inoorporated (BSl)/LVS-002, Work M o a Package 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 BSlKVC002, WEP 05-006, these determinations are appropriate for the types of radiation involved and the media being surveyed.

Approval Signatures Date:

FSSICharacterization Engineer /o- / p - - f l Technical Reviewer FSSICharacteriaati

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FSS Design # EP Rx 132 Survey Unit: Rx 132 Revision # Original 1 Page 2 of 3 1,O HistarylDescription 1.1 The subject pipe system is the 3" spare line running through Quad C to the Sub Pile Room.

1.2 EP Rx 13 2 wnsi sts of 3" diameter piping that is approximately 20 feet in Iength.

Survey Design Information 2.1 EP Rx 132 was surveyed IAW Procedure #BSI/LVS-002.

2.2 100% of the 3" ID pipe was accessible for survey. The accessible 3" ID pipe was surveyed by static measurement at one foot increments, for a total of 20 survey measurements.

2.3 Surface area for the 3" 1l)piping is 730 cm2for each foot of piping, corresponding to a total 3" LD piping surface area of 14,5 93 cm2( 1.5 mZ) for the entire length of (approximately 20') of 3" piping..

Survey Unit Measurement LocationslData 3.1 Pipe interior radiological survey forms are provided in Attachment 2 of this release record.

Survey Unit Investigations/ResuIts 4.1 None Data Assessment Results 5.1 Data assessment results are provided in the EPlBuried Pipe @P) 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 I mremlyr 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 TBD-06-004, the survey unit that is constituted by EP Rx 232 passes FSS.

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

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FSS Design # EP Rx 132 Revision # Original Page 3 of3 Survey Unit: I b 132 5.5 Statistical Summafy Table 6.0 Documentation of evaluations pertaining to compliance with the unrestricted use limit of 25 m r d y r and dose contributions h r n Embedded Pipe and radionuclides contri?mting10% in aggregate of the total dose for both structural scenarios and soils.

6.1 A revim of the survey results b shown that the dose contrjbution for EP Rx 132 to be less than 1 mmdyr. The dose contribution is estimated to be 0.014 W y r based on the -a ofthe actual gross counts measused 7.0 Aitdments AtUhmmt I - BSI EPBP Suwey Report A t t a c h e d 2 - Pipe Interior Radiologiml Survey Form 3 - DQA Worksbeet Attachment 4 -Disc containing RR for EP Rx 132 & Spreadsheet

SECTION 7 ATTACHMENT 1 2 PAGE(S)

B S EPlBP SURVEY REPORT RP Englnw I Date

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SECTION 7 ATTACHMENT 2 S PAGE(S)

Pipe Interior ~adio~ogicd Survey Form Date: /-)?-d 6 Time: 1a ir Building: @ fy#C F O E Elevation - - Access Point Area:

OU~O C System: 5 P ~ n t  % - . $&?@ pipe Diameter: - 3 ' e ID &-/3Z Type of Survey Investigation Characterization Final Surve Other ,H Sled Size II VL Patz inch Detector: qC/-62 Detector ID #:

r-Cal Date: //-I 7-05 Cal Due Date: ~ 7 - k. 0 Instrument: z 3~- Instrument ID #: ZIZZZ-3 Cal Date: 1w 7- 6 Cal Due Date: / C-r 7-0 b From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 5.2- cpm MDCRstatic 4.4 ~pm CP c=+O C l m &m;md:ov Efficiency Factor for Pipe 6.0063~3 (taken from detector e a t i 8 d d i m t @

meter a77 4 dpm/l~crnZ

&a StaaIC IS the M D C s t a t i c No (if no, adjust sample count time and recalcu1ate MnC&lk) cm&&k!e? EJ , IS ,+c 3u Q d W Pipe Interior Radiological Survey Radiological Survey Commenced: Date: / 06 Time: /o/r Package Page 1 of2 0 REFERENCE COPY Attachment 3, Page 1

Pipe Interior Radiological Survey Form (Contiau ation t or m)

Package Page of 3 0REFERENCECOPY Attachment 3, Page 2

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REFERENCE COPY V

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Pipe Interior Radiological Survey Form Date: 1-16 -&+06 Time: 6' a " ~

Building: RX Elevation -37 Access Point SF'R System: 5 p e 5 i'R Pipe Diameter: Area: Pipe ID E X 1.32. &.la <

Type of Survey Investigation Characterization Final Surv Other 1 Sled Size inch Detector: 74-6z- Detector ID #: z / ~ 7 0 1Vd ,%/ -

Cal Date: / /-i 7-0 5- Cal Due Date: //~/7-0&

Instrument: -j7> -I Instrument ID #: 2 / tZZ-3 Cal Date: //-I 7 -&>/ Cal Due Date: //-/7-8 fs From the Daily Pipe Survey Detector Control Form for the Selected Detector Background value , cpm MDCREtatic L/.y C P ~ e$dcMc d&m:nrJg:oq Efficiency Factor for Pipe

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Is the MDCSmtic 2 7 7:9 :dd,,, O.00013 (taken from detector (if no, adjust sample count time and recalculate MDC&,&=)

c&%@&b!e? Co u-7id rAfl f f dd SUQLu'l'r/

p a = f - 9 3 6 7 4 ~ i ~d~ m S F E C S L ~ RP ~ L G m o m )

Pipe Interior Radiological Suwey Radiological Survey Commenced: Date: /- b-d b Time: 0 83 Package - Pane  !

- 1 of T 0 REFERENCE COPY Attachment 3, Page 1

REFERENCECOPY 0

SECTION 7 ATTACHMENT 3 PAGE(S)

DQA Check Sheet Design # Rx 132 Revision# Original Survey Unit # Rx 132 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 X

survey units, or below 0.5 D C G L for Class 3 survey units?

3. Is the instrumentation MDC for embeddedlburied piping static measurements below the D C G h ? 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 volumetrk 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 'Special Methodsnfor 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

1. Has a posting plot been created? X 1 I I Page 1 of 1

SECTION 7 ATTACHMENT 4 1 DISC