ML073330612

EP-CRT-8, Nasa, Survey Unit Release Record

ML073330612
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-8
Download: ML073330612 (12)

Text

-

Survey Unit Release Record

-# EP-CRT-8 Revision # Original Page 1 of 3 Survey Unit Ws) CRT-8

1) Embedded Pipe (EP) Survey Unit CRT-8 meets the -tion of embedded pipe for Phrn Brook Reactor Facility (PBRF).

2) EP CXT-8 is a Class 1, Group 1 survey unit as per the PBRF Find Status Survey Plan (FSSP) and Technical Basis Document ('I'BD)-M-OoQ.

3) Surveys in EP CRT-8 were performed using a scintillation detector optimized to measure gamma energies representative of C040. Sample #EP 3-9 from Survey Request (SR)-13 was referenced fbr this decision.

4) Survey Instructions for this survey unit are incorpo-ratedinto and @med in accardance with (MW)the Babcock SerJices Incorporated @Sr)/LVS-002, Work Excution Package (WEP)05-006. Survey instructions described in this document camtitUte "Specirrl Methods" and the survey design used in the acquisition of survey measuremeas.

5 ) Instrument N~ciencydetamhtions are developed in accordance with the BSXVS-002, WEP 05-006, these determinations are appropriate for the types of radiation involved and the media being surveyed.

FSS Design # EP CRT-8 Revision # Original Page 2 of 3 Sutvey Unit: CRT-8 1.0 EGstory/Description 1 .1 The subject pipe system is a 2.5" diameter p e n d o n located on the CllT plate within the Sub Pile Room. The system access point is located on the

-34' el. of the Rx building.

1.2 EP CRT-8 mnsists of 2.5"diameter piping that is approximately 3 feet in 20 Survey Design Information 2.1 FLPCRT-8 was ameyed IAW Prodwe #BSVLVS-002.

2.2 100% of the piping was m s i b l e for survey. The accessible pipe was surveyed by static meamment at m e foot increments, for a total of 3 m e y measurements.

The total surf= area h r the piping system is approximately 1,824 cm2 (0.2 m2) for the entire length of (3') of pip'-.

3.0 Survey Unit Measurement Locationdllata 3.1 Pipe interior radiological survey forms are pravided in Attachment 2 of this release record.

4.0 Survey Unit T n v e s t i ~ t i o ~ b 4.1 None 5.0 Data Assessment Results 5.1 Data asmment results are provided in the EPIBuried Pipe (BP)S w e y Report provided in Attachment 1.

52 All measurement results are less than the Dwived Concernstion Guiddine Level @CGL) for donuclide specific EP tbat camponds to the 1 mremlyr dose goal established in Table 3-3 ofthe:FSSP.

When implementing the Unity Rule, provided in Section 3.6.3 of the FSSP,and applying the Nuclide F d o n (NF), provided in TBM5004, the survey unit that is constituted by EP CRT-8 passes FSS.

5.4 Background was not subtracted h m the survey measurements and the.

Elevated Measurement Comparison W C ) was not employed for this m e y unit.

FSS Design # EP CRT-8 Revision # Origmal Page 3 of 3 S m y Unit: CRT-8 5.5 Statistid Surnmary Table 6.0 Documentation of evduations pertaining to compliance with the unrestricted use limit of 25 me* d dose contributions from Embedded Pipe and r;tdionuclid.escontributing 10% in aggregate of the total dose fix both mctural scenarios and soils.

6.1 A review of the survey resuIts has shown that the dose contribution for EP CRT-8 to be less than 1 mredyr. The dose contribution is estimated to be 0.030 W y r based on the average ofthe a d p s s counts m e a d .

Attachments Attachment 1 -BSX EPBP Sumey Report Atkdumt 2 -Pipe interior Radiological S w e y Form Attachment 3 - DQA Worksheet Attachment 4 -Disc containing RR fbr EP CRT-8& Spreadsheet

- -- -- -- - -

SECTION 7 ATTACHMENT 1 2 PAGE(S)

B S I EPlBP SURVEY REPORT COMMENTS:

ACTIVITY VALUES NOT BACKGROUND CORRECTED RPElrgb#erlm

SECTION 7 ATTACHMENT 2 z PAGE(S)

BSETVSPipeCrawler-002 Revision 5 Pipe Interior Radiologkal S m e y Form Time:

Pipe ID#: ( R T - ~PipeDiameter: a.sN Access Po& Area:

Building: Ld Elevation: -34' System:

Type of Survey Investigation Final Survey .%+ Other Gross C060 CS Detector ID#/ Sled ID# \ 1kv5-\ / h ) ~ SU Detector Cal Date: 1- \ \ - 0 7 Detector Cal Due Date: I -\]-oL .

Instmment: 235U- \ Instrument ID#: 199 04")

Instrument Cal Date: A - InstrumentCalDueDate: -I146 From the Daily Pipc Survey Detector Control Form for the Selected Detector Background Value 3 .+ . cpm MDCKtstio )9 C P ~

Efficiency Factor for Pipe Diameter 0.0.0'03.3 (fiom detector efficiency determination) mcsbtic 3427 dpd 10 an2 Is the MDCSmicacceptable? @ No . (if no, adjwt sample count time and recalculate mCLC) comments: Po %+ Qbon PDb 7, ~ , om&,&A-,

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

n REFERENCECOPY

SECTION 7 ATTACHMENT 3 p

1 PAGE(S)