ML073170445

Survey Unit Release Record EP WHB-111-5

ML073170445
Person / Time
Site:	Plum Brook  File:National Aeronautics and Space Administration icon.png
Issue date:	11/07/2007
From:	US National Aeronautics & Space Admin (NASA)
To:	NRC/RGN-III/DNMS/DB
References
EP WHB-111-5
Download: ML073170445 (14)

Text

Survey Unit Release ReGod Dtsign #

Survey Unit #(s) doament constitute "Special Methodzr" and the sumq design used in the acquisition of survey measurements.

5) Znstrunt efficiency determinations are developed in $ccordturce with the BSyLVS-002, WEP 05-006, these detemiaat ions are appropriate for the types of radiation involved and the media being surveyed.

EP-WHB-111-5 WHB-111-5

1) Embedded Pipe (EP) Survey Unit WHB-111-5 meets the definition of embedded pipe fbr Plum Brook Reactor Facility (PBRF).

2) EP WHB-111-5 is a Class 1, Group 3.3 survey unit as per the PBRF F a Status Suxvey Plan (FSSP) and Technical Basis Document (TBD)-O&.004.

3) Surveys in EP WHB-111-5 were prformed using a scintillation detector optimized to m e a m gamma energits r e p r d v e of Cs-137. Sample #EF 3-3 from Survey Request (SRk 13 was rekenad for this decision.

4) S w e y Insbuctions for this survey unit are incorpmkd into snd paformed in ~ ~ ~ ~ r d o z n c e with (TAW) the Babcock Services Incoqmnted (BSIi)LVS-OOZ, Work Execution Package (WEP)05-006. Survey instructions described in this Revision #

Original Page 1 of 3

FSS Design # EP WHB-111-5 Revision # Original Page2 of3 Survey Unit: WHB-111-5 1.O Historyhscription

1. I The subject pipe system is an evaporator pit drain line located on tbe Waste HandIing Building (WEB) -5' el, 1.2 EP WHB-111-5 consists of 2" diameter piping that is a p p r o ~ e l y 30 feet in length.

Survey Design Information 2.1 EP~-lll-Swas~~dIAWProcedure#BS~VS-002.

2.2 100% ofthe 2" ID pipe was accessible for s u m. The accessible 2" ID pipe was sumeyed by static mmrement at o m fht incrementq for a total of 30 survey measurements.

2.3 Sd~eareafbrtb2~IDpipingis486m~fireachfootofpipin&

conrespanding to a total 2" XD piping s d a e a m of 14,593 cm2 (1 -5 ma) for the entire length of (approximately 30') of 2" piping.

Survey Unit M

~

~

w r

t L~&onslData 3.1 Pipe interior radioIogicaI sumey fbrrns are provided in Attachment 2 of this release record.

Survey Unit hwsti~ions/Resu~ts 4.1 None Data Assessment R&s 5.1 Data assessment resuhs are provided in the EPIBuried Pipe CBP) S w e y Report provided in Attachment 1.

5.2 Allmm~dswIessthoultkeDerivedCon~tttionGuidaIine Level (DCGL) fbr radiomclide specific EP that corresponds to 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 TBD-06-004, the survey unit that is constituted by EP WHB-I Z 1-5 passes FSS.

5.4 hckgnmd was not subtracted from the m e y measurements and the Hevatad Meamment Comparison (EMC) was not ernpfayed for this survey unit.

/FSSDesign#EPWHB-111-5 IRevision#Original I

Page 3 of3

/

I Survey Unit: WHB-111-5 5.5 Statistical Summary Table 6,0 Documentation of evaluations pertaining to compliance with the m&cted use limit of 25 mrern/yr md dose eontnibutions from Embedded Pipe md radionuclides contributing 100h in aggregate of the total dase for both s t m w scenarios and soils.

6.1 A review of the m e y results has show that the dose contribution for EP WHB-111-5 to be less than 1 medyr. The dase contribution is estimated to be 0.024 mremlyr b a d on the average of the actual gross counts measured.

Attachments - BSI EPBP Survey Report - Pipe Interior Radiological Survey Form AttacMnt 3 - DQA Worksheet Attztchment 4 -Disc containing RR for EP WHB-1 I 1-5 & Spreadsheet

SECTION 7 ATTACHMENT 1 PAGE(S)

ACTIWTY VALUES NOT BACKGROUND CORRECTED RP Engineer ) Date

EP WHO-1 1 1-5 2" Pipe T8D 061004 Group 3.3 EM-lw a a i i Wwi-1 9C I

c~ra~.eavn, (dpnJ1-1 NW-QW O~(PSCWIY (dpmll-MEAN I 0.024 MEDIAN 1 0.023 STD [3EV 1 0.00s EU-162-(dpmr4-1' 1

w-actjvuy MAX llnity corm-malam 0.037 MIM 0.015

SECTION 7 ATTACHMENT 2 3

. PAGE(S)

BSIiLVSPipeCrav?ler-002 Revision 4 Pipe Interior Radiological Survey Form Date:

~ / Z S / O G Time:

107 1 Pipe JD#:

w 4s - 1 / - 5 Pipe Diameter:

2 "

Access Point Area:

r/42 ? 1 Building:

UkkB Elevation:

- 5 '

System:

~~~INJ Type of S w e y investigation Characterization Final Survey fl Other P' Gross Co60 Cs.i, 7

Detector ID# / Sled ID# 4.4- - 1 SY Z 3 V 3 671 hid SLGS Detector Cal Date:

( ; / % I / O L Detector Cal Due Date:

6 / Z I 107 Instrument:

2 3 TO-I hstxwnent JD #:

/ 8 C l o T $

, Znstrument Cal Date:

3 / 1 r / o 6 lnstrunent Cal Due Date:

311 s/07 From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 5. cpm mCRsratic

23.

2 1s the MDCsm,i, acceptable?

Technician Signature Pipe Interior Radiological Survey REFERENCE COP Package Page 1 of 3, Page 1

BSL/LVSPipeCrawIcr-002 Revision 4 Pipe Interior Radiological Snrvey Form (Contfnnatfon Form;)

Date:

n / z

• L a Pipe ID#: wr+zL-J j 1 - 5 Pipe Diameter:

2 I'

Access Point Area: G yfie 5' '

P1 r Building: -

LU & R Elevation:

System:

&2&-7d_r Package Page f of j, Page 2

SECTION 7 ATTACHMENT 3

-Check shea Design #

WE1 1 1-5 Revision #!

Odglnal survey Unit #

WHB-111-5 Preliminary Data Re-Urwm to the following questions hould be fully documented in ihe Survey Unit ym No NIA' Release Record I. Haw surveys been petformed In accordance with survey insbudions in the Survey Design?

X

2. Is the instrumsntatlon MDC for structure statfc rneasuremsnts below the DCGtrvfor Class 1 and 2 survey unb, or betow 0.5 D C Q h for Class 3 survey units?

X

3.

Is the tnstrumentetlon MOC for mbedddlburied piping static measurements Mowthe DCGh ?

X

4.

W s the InstrumenWlon MDC #or structure scan measurements, soil scan measurements, and embeddWbulled piphg scen measurements below the DCGLw, or, if nof was the need for additjowl X

static measurements or soil samples addressed in the survey design?

5. W e the inslrumedalion MDC for volumetric measurements and smear analysis < 10% OCGh 7 X

6.

Were the MDCs and assumptions used to develop them appropriate for the instruments and teehnlques used to p w k m the survey?

7. Were the survey m m o used to collect data proper for the types of radiation involved and for the media being surveyed?

X

8. Were'Spwid Methods" for data d k d i o n property applied forthe survey unit under revlew?

X R Is the data set comprised of qudiied measurement results collected in accordance wRh the survey design, which ammteiy reflects the radiologiml status of the facility?

X Graphiul Data Revlew

1. Has a posting plat ken created?

X

2.

Has a h i m (w other frequency plat) k e n created?

X

3.

Have other graphical data tools been created to assist in ctnalying the data?

X Dpfe Analpis

1.

Are all sample measurements below the (Class 1 & 2), or 0.5 DCGb (Class 3)?

X

2.

Is the mean ofthe sample data c DCGb?

X

3.

If elevated areas have been identified by smns andlor ampling, is the average activiky in eech elevated area < D C G k (Class I), < DCGk (Cia= 21, or 4. 5 DOGh (Clas a)?

X 4

IstheresultaftheElevatedMeasurementsTest~1.07 X

5, Is the result of the stafistical test (S+ for Sign Test or Wr for WRS Test) 2 the crltleal value?

X Comments:

Page 1 of 1

SECTION 7 ATTACHMENT 4 1 DISC