ML073330644

EP-CRT-4, Nasa, Survey Unit Release Record

ML073330644
Person / Time
Site:	Plum Brook  File:National Aeronautics and Space Administration icon.png
Issue date:	11/15/2007
From:	US National Aeronautics & Space Admin (NASA)
To:	NRC/RGN-III/DNMS/DB
References
EP-CRT-4
Download: ML073330644 (12)

Text

Description t-Survey Unit Release Record wgn#

EP-CRT-4 Revision #

Original Pap 1 of 3 Suwey Unit #(s)

CRT-4

1) Embedded Pipe @P) Survey Unit CRT-4 meets the ddnitian of embedded pipe for Plum Brook Reactor Facility (PBRF).

2) EP CRT4 is a Class 1, Group 1 survey unit as per the PBRF Final Status Survey Plan @SSP) and T e c h i d Basis Document (

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3) Surveys in EP CRT-4 were performed using a scintillation d e t m o p t i m a to measure gamms energies representative of M O

Sample #EP 3-9 from Survey Request (SR)-13 was referenced fbr this decision.

4) Survey Instructions for this survey unit are incorporated into and performed in ac~ordance with (TAW) the Babmk Services lncorporsted (BSx)JLVS-002, Work Execution Package (WFiP)05-006. Survey instructions demibed in this document constitute "S@

Methods" and the survey design used in the acquisition of suntey measurements.

5 ) h k ~ m e n t efficiency determidons are developed in a c

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with the BSULVS-002, WEP 05-006, these determinations we appropriate for the types of radiation involved and the media being w e y e d.

Page 2 of 3 S m y Unit: CRT-4 L O HktoryDescription 1.1 The subject pipe system is a 2.5" dieter penetration located on the CRT plate within the. Sub Pile Room. The system access point is located on the

-34' el. of the Rx building.

1.2 EP CRT-4 consists of 2.5" diameter piping that is approximately 3 feet in 1-a 2.0 S w e y Design lafamation 2.1 EP CRT-4 was surveyed IAW Procedure #BSvLvs-002.

2.2 1W/o of the piping was accessible for survey, The acceshlihb pipe was surveyed by static mamement at one foot increments, for a total of 3 survey measurements.

2.3 The total stdm area for the piping system is appoximrttely 1,824 m?

(0.2 m2) for the d r e length of (3') of piping.

3.0 Survey Unit Measurement ~

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a t

a 3.1 Pipe interior radiological m e y forms are provided in Attachment 2 of this release record.

4.0 Survey Unit Investigationdlksults 4.1 None 5,0 Data Assessment Remits 5.1 Data assessment resubs are provided in the EPIBuried Pipe @P) Survey Report provided in Attachment 1.

5.2 All measurement results am less than the M e d C a M a n Guidehe Level (DCGL,) for radionuclide specific EP that wmqmds to the 1 mdyr dose god established in Table 3-3 of the FSSP.

5.3 When implementing the Unity Rule, provided in Section 3.6.3 of the FS SP, and applying the Nuclide F d o n 0, provided in TBM-004, the survey unit that is constituted by EP CRT-4 passes FSS.

5.4 Biwkgmund was not subtmcted from the m y

measurements and the Elevated Measurement Comparison @MC) was not mployed for this survey unit.

Maximum 10.1219 FSS Design # EP CRT-4 Minimum 0-QQOO Survey unit: CRT4 5.5 StatisticalSummaryTable 6.0 Documentation of evaluations pertaining to compliance with the &cEed use limit of 25 W y r and dose contributions h m Embedded Pipe and radlomcIidcs contributing 1% in aggregate of the total dose for both structural d

o s

and soils.

6.1 A review of the survey results has sham that the dose contribution for EP CRT-4 to be leas than 1 &yr.

The dose cantribution is athated to be 0.046 d y

r based on the amage of the actual gross counts measured.

7.0 Attachments - BSI EPBP Survey Report - Pipe Interior aadiological Survey Form Attacbtnerrt 3 - DQA Work&-

Atkhmmt 4 -Disc containing RE1 fbr EP CRT-4 & Spreadsheet L

Revision # Origind Page 3 of 3

SECTION 7 ATTACHMENT 1

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PAGES

BSI EPIBP SURVEY REPORT COMMENTS:

ACTIVITY VALUES NOT BACKGROUND CORRECTED RP Engimr I Date

//-I2

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SECTION 7 ATTACHMENT 2 2 PAGE(S)

BSVLVSPipeCrawler-002 Revision 5 Pipe Interior Radiological Survey Form Time:

r d 3 Y PipriD#:

CKe;$

PipeDiameter:

1.5' Access paint h a :

Building:

Elevation:

- 3 y System:

Type of Sunfey Il~vestigation Characterization Final Survey X Other J Gross COGO J Cs Detector D#

1 Sled ID#

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%J Detector Cal Date:

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Detector Cal Due Date:

\\ - \\ \\ - 0 8 Instrument:

2350-1

~nstrume~~t ID #:

1 S q W-\\

Instrument Cal Date:

\\ -1 1- 0 7 Instrument Cal Due Date:

J - \\ \\ -01 From the Daily Pipe Survey Detector Control Form for the-Selected Detector Background Value 3,LC cpm mmtatic lo cpm Efficiency Factor for Pipe Diameter b,0 0 0 3 ~ (fiorn detector efficiency determination)

MDCwic 3427 dpm/,

cm2 Is the MDCSMae'acceplable?

NO (if no, adjust sample count time and recalculate MDCRgtaiC)

Comments: post C L L O ~

t 0 0 3 b C O W D ~. ~,

Technician Signature Pipe Interior Radiological Survey REFERENCE COPY Package Page 1 of 2,, Page 1

REFERENCECOPY I-\\

SECTION 7 ATTACHMENT 3

, PAGE@)

)I

)

Check megt Design #

EP CRT-4 Revision #

Original survey Unit #

EP-CRT-4 7

7 Prefimirxarg Oata FP&iavrr' Answers to the following questions should be fully documented in the Survey Unit Release Record Yes No M A

1. Have surveys been performed in accordance with survey instructions In the Survey Deslgn?

X 2 Is the instrumentation MDC for structure static measurements below the DCGh for Class 1 and 2 survey units, or bdow 0.5 DCGLw for Class 3 survey units?

X

3. Is the ~nstmrnentatim MDC for mbeddedlburied piping static measurements below the DCGLw ?

X

4.

Was the instrumentation MDC for structure scan measurements, soil scan measurements, and embeddedburied piplng scan measurements below the K G h, or, if not, was the need for additional X

static measurements or soil samples addressed in the survey design?

5 Was the ~nstrurnentafion MDC for volumetric measurements and smear analysis c 10% DCGLw ?

X

8. Were the MDCs and assumptions used to develop them appropriate for the instruments and techniques used to perform the survey7 7

Were the survey methods used to collect data proper for the types of radrat~on involved and for b e media being surveyed?

X 8

Were 'Sp8cial M&hodsn for data collection properly appl~ed for the survey unit under review?

X

9. Is the data set comprised of qualified measurement results collected In accordance with the survey design, which accurately reflects Me radiological status of the faclllty?

X CS4912 Page 1 of 1

SECTION 7 ATTACHMENT 4 1 DISC