ML073170450

Survey Unit Release Record EP WHB-111-6

ML073170450
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-111-6
Download: ML073170450 (14)

Text

Description Smey Unit Release Record Dtlrip #

EP-WHB-1 1 1-6 Page 1 of 3 Survey Unit #(s)

Revhion #

WHE-111-6

1) Embedded Pipe @P) Survey Unit WHB-I 1 1-6 meets the definition of embedded pipe fbr Phun Brook Reactor Facility (PBRF).

2) EP W - I 11-6 is a Class 1, Group 3.3 survey unit as perthe PBW Final Staturs Survey Plan (FSSP) and Technical Basis Document ( T 1 3 D ~ ~.

3) Surveys in EP W - 1 1 1 - 6 were perfmmd using a scintillatian detector apeimhd to measure gamma energies r e p d v e of C* 137. Sample #EP 3-3 froin Survey Request (SR)-

1 3 was referaced for this decision.

4) Survey hutructions for this survey unit m incorporated into and performed in -dance with flAW) the Babcock Services Incorporated (BSI)/LVS-002, Work Execution Package (WEPI 05-006, S u m inshutions described in this Origiml document constitute "Special Mdhods" and the survey design u d in the quisit ion of survey maswemnts.

5) Instrument eficiency determinations are developed in wccordaoct: with the BSVLVS-002, M P 05406, these determinations am appropriate for the types of W o n involved and the media being surveyed.

L FSSDesign#BPWHB-1126 Rwision#Originat Page 2 of 3 Survey Unit: ~

1 1

1 6

1.0 HistoryDeScriptian 1.1 The subject pipe sy-is aa evaporator pit drain tine located an the Waste Handling Building (WHB) -5' el, 1.2 EP WHB-1'1 1-6 consists of 2" diameter piping tbat is ~ ~ m a t e l y 30 fBee in length.

Survey &sign Information 2.1

~ W H B - 1 1 1 - 6 w a s w e y d I A W ~ e # B S ~ V S - 0 0 2.

2.2 100% of the 2" ID pipe was accessible for survey. The accessible 2" ID pipe was surveyed by static measuremeat at w e foot increments, fur a total of30 survey meawemexnts.

2.3 Sfaceareafortbe2"IDpipingis486cmZfbrdfootofpipin~

corresponding M s total 2" ID piping aurface ares of 14,593 an2 (I.S m2) for the entire length of (approximately 30') of 2" piping.

Swvey Unit Measurement L o c a t i d a t a 3.1 Pipe interior radidogical m e y fbrms are provided in Attachment 2 of this release m r d.

Survey Unit Invesri@ons/ResuIts 4.1 None Data Assessment Results 5.1 Data assessment m l t s are provided in the EPIsuried Pipe @P) Survey Report provided in Attachment 1.

5 -2 All measurement results are less than the Derived Concentration Guideline tevel (DWL) for radionuclide specific EP that compon& to the 1 mrem/yt dose goal esthlished in Table 3-3 of the FSSP.

5.3 When implementing the Unity Rulq provided in Section 3.6.3 of the FSSP, and applying the Nuclide Fraction (NF), provided in TBD-OB-001rl, the s w e y unit that is constituted by EP WHR111-6 passes FSS.

5.4 Background was not s u W e d fiom the survey maswments and the Elevated Measurement Comparison (IEMC) weas not employed for this survey unit.

+

FSS Design # EP WHB-I 114 M o n # W n a l Page3 of3 Survey Unit: WHB-1 1 1-6 5.5 Statistical Summary Table L.0 D o d o n of evaluations pertstininn to compliance with the unrestricted we limit of 25 mdyr and dose contributions h m EmbeddedPipe and radionuclides contributing 10% in aggregate of the total dose for both mctutal as and mils.

6.1 A d e w of the survey results has shown that the dose contribution for EP WHB-I 1 1-6 to be less than 1 &yr.

The dose contnhtion is estimated to be 0.027 medyr based on the average of the Bctual gross a m t s measured.

7.0 Attachments - BSI EfBP Survey Report - Pipe Interior Radiologid S m e y Form

-bent 3 - DQA Worksheet -Disc containing RR for EP WHB-111-6 & Spfetidsheet

SECTION 7 ATTACHMENT 1 z

PAGE@)

BSI EPJBP SURVEY REPORT

-Stad 238387 1 tm sled CTWITY VALUES NOT BACKGROUND CORRECTED RP Engkreer 1 Date

SECTION 7 ATTACHMENT 2

Pipe Interior Radiological Survey Form Time:

12s l

BSVLVSPipeCrawler-002 Revision 4 4

Pipem#: lyNg-f l / -

PipeDiameter:

2 "

Access Point Area: Er//48

?I i-Building:

wHi3 EleWion :

5 f System:

p AIS Type of Survey Investigation Characterization Final Survey,

Other Gross C06O Cs Dktector D#.

/ Sled IWC Sq 93&7 1 MO. SLSQ Detector Cal Date:

6/21 / d 6 Detector Cal Due Date:

6 /Z /id7 I

I Instrument:

~ 5 s b - l hs~mlment ZD 8:.

I kq 0 9 6 Instrument Cal Date:

3// P/OL Insbument Cal Due Date:

From the Daily Pipe Srarvey Detector Control Form for the Selected Detector Background Value 35.1 cpm Efficiency Factor for Pipe Diameter 0

a d oo4.8 (from detector efficiency determination)

-,53/4 d p d MDC&

GQ cm2 Is the MDCSbk acceptable?

NO (if no, adjust sample count time and racaldah MD-

,v,mM S0,iZVE.r-Comments:

L A

Technician Signature pipe Interior Radiological Survey 3

Package Page I of -, Page 1

B SL'LVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Su rvby Form (Cou tinuation Form)

Pipe ID#:

Pipe Diameter:

2' Access Point Area: EM k 1 I-Building:

~3 Elevation: T System:

ix?&thrf zc 3 Package Page -

of -, Page 2

1 REFERENCE COPY 13 9

SECTION 7 ATTACHMENT 3 1

PAGE(S)

DQA Check Sheet Design #

WHB-111-8 Revision #

Original Survey Unit #

WHB-I 1 1-6 Ptelirninary Data Review' Anrrmrs to the tollowing questions should be fully documented in tha Survey Unit Yes No NIA Release Record

1. Have surveys been perlormed in accordance with suwey instructions in the Survey Ds~ign'l X

2.

Is the insErumeWon MDC for structure static measurements below the DCGh for Class 1 and 2 survey units, or below 0.5 D C Q h for Class 3 survey units?

X

3.

Is the instrumentation MDC for embeddedlburied piping static measurements W w the DCGh 3 X

4. Was the Instrumentation MDC for structure scan measurements, soil scan measummts, and embeddedlburied piping scan measurements below the DCGha or, if not, was the need for additional X

static messurements or soil samples addressed in the sumy dsign?

5. Was the instrumentation MDC for volumetric measurements and smear analysis < 10% DCGLw ?

X

6. Were the MDCs and assumptlons used to develop them approprkte forthe instruments and techniques ---

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

X

8. Were "Special Methods' for data dl-properly applied R r the survey unit under review?

X

9. Is the data s& mprised of qualified mmsurement mutts cdlected in accordance with the suwey design, which ammbly reflects the radiolcgicrrl status of the facilii X

Page I of 3

SECTION 7 ATTACHMENT 4 1 DISC