ML073170421
| ML073170421 | |
| 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-111-3 | |
| Download: ML073170421 (14) | |
Text
Survey Unit Release Record Design #
Original Page 1 of 3 Suwey Unit #(s)
Description EP-WHB-111-3 WHB-111-3
- 1) Embedded Pipe (EP) Survey Unit WHB-111-3 meets the definition of embedded pipe for Plum Brook Reactor Facilii (PBRF).
- 2) EP WHB-111-3 is a Class 1, Group 3.3 survey unit as per the PBRF Final Status Survey Plan (FSSP) and Technical Basis Document (TBD)-06-004.
- 3) Surveys in EP WHB-111-3 were perf&
using a scintillation detector optimized to measure gamma energies representative of Cs-137. Sample #EP 3-3 &om Survey Request (SR>13 was referenced for this decision.
- 4) Survey Instructions for this survey unit are incorporated into and performed in accordance with (IAW) the Babcock Services Incorporated (BSI)/LVS-002, Work Execution Package (WEP)05-006. Survey instructions described in this document constitute "Special Methods" and the survey design used in the acquisiion of survey measurements.
- 5) Insbument efficiency determinations are developed in accordance with the BSI/LVS-002, WEP 05-006, these determinations are appropriate for the types of radiation involved and the media being surveyed.
Revision #
aractenzatton Y -
Survey Unit: WHB-111-3 1.0 History/Description 1.1 The subject pipe system is the laundry drain line located on the Waste Handling Building (WlB) -5' el.
1.2 EP WHB-111-3 consists of 2" diameter piping that is approximately 30 feet in length.
2.0 Survey Design Information 2.1 EP WHB-111-3 was surveyed IAW Procedure #BSI/LVS-002.
2.2 100°/o of the 2" ID pipe was accessible for survey. The accessible 2" ID pipe was surveyed by static measurement at one foot increments, for a total of 30 survey measurements.
2.3 Surface area for the 2" ID piping is 486 cm2for each foot of piping, corresponding to a total 2" ID piping surface area of 14,593 cm2 (1.5 m2) for the entire length of (approximately 30') of 2" piping.
3.0 Survey Unit Measurement LocationslData 3.1 Pipe interior radiological survey forms are provided in Attachment 2 of this release record.
4.0 Swvey Unit Tnvestigations/Results 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPlSuried Pipe (BP) Survey Report provided in Amchment 1.
5.2 All measurement results are less than the Derived Concentration Guideline Level (DCGL) for radionuclide specific EP that corresponds to the 1 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 (NF), provided in TBD-06-004, the survey unit that is constituted by EP WHB-111-3 passes FSS.
5.4 Background was not subtracted from the survey measurements and the Elevated Measurement Comparison (EMC) was not employed for this survey unit.
Statistical Parameter FSS Design # EP WHB-111-3 Survey Unit: WHB-I I 1-3 5.5 Statistical Summary Table 6.0 Documentation of evaluations pertaining to compliance with the unrestricted use limit of 25 mredyr and dose contributions &om Embedded Pipe and radionuclides contributing 10% in aggregate of the total dose for both structurai scenarios and soils.
6.1 A review of the survey results has shown that the dose contribution for EP WHB-111-3 to be less than 1 mredyr. The dose contribution is estimated to be 0.009 mredyr based on the average of the actual gross counts measured.
7.0 Attachments - BSI EPBP Survey Report - Pipe Interior Radiological Survey Form - DQA Worksheet -Disc containing RR for EP WHB-111-3 & Spreadsheet Revision # Original Page 3 of 3
SECTION 7 ATTACHMENT 1 3
PAGE(S)
BSI EPIBP SURVEY REPORT Detector8led #
UESNOTBACKGROUNDCORRECTED RP Engineer I Date
EP WHB-1113 2" Pipe TBD 06-004 Group 3.3
EP WHB-111-3 2" Pipe TBD 06-004 Group 3.3
SECTION 7 ATTACHMENT 2 3
PAGE(S)
BSIILVSPipeCrawler-002 Revision 4 Date:
Pipe ID#:
Building:
Pipe Interior Radiological Survey Form Time:
1007 1 1 I - 3 Pipe Diameter:
2 "
Access Point Area: Evfic 7, I bl-193 Elevation:
System:
cu(uh,~pq t
DRff/A/
Type of Survey Investigation Characterization Final Survey )Q Other L, Gross C06O CS L,
Detector ID# I Sled ID# +-/S4 9 %-3b36 q 1 NO SLED Detector Cal Date:
7/5/0 C Detector Cal Due Date:
4 /do 7
'Instrument:
Z T S - ~ - /
hstrument ID #:
2034ee Instrument Cal Date:
7/&
6 Instrument Cal Due Date:
~/s,/o 7
From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 4, 5 cpm MDCktatic 10#3 CPm Efficiency Factor for Pipe Diameter 0. o 004 (from detector efficiency determination)
MDCstltic ZQ5Z dpm/
IMJ cm2 Is the MDCSal, acceptable?
NO (ifno, adjust sample count time and recalculate MDC&atac)
Comments:
??I s u n v ~ ~ r ; P o s i-412 I?-
R J K I L. - EP3 3 UWP LETE
~ i v ! r / n ~
< ~ j n v ~ - i b/ 29/0 6 Technician Signature
/.
Pipe Interior Radiological Suwey REFERENCE COPY Package Page 1 of?, Page 1
BSIILVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey ~ o r m (Continuation Form)
Date:
1 O/Z 3 /a6 Pipe ID#: W & ~
/I/ - 3 Pipe Diameter:
2
- Access Point Area: Evy+p. p, r Building:
3 Elevation:
-5' System:
l.WNDRY D R ~.
Package Page 2 of 3 REFERENCE COPY, Page 2
SECTION 7 ATTACHMENT 3 r
PAGE(S)
Page 1 of 1
SECTION 7 ATTACHMENT 4 1 DISC