ML073170377
| ML073170377 | |
| Person / Time | |
|---|---|
| Site: | Plum Brook |
| Issue date: | 11/06/2007 |
| From: | US National Aeronautics & Space Admin (NASA) |
| To: | NRC/RGN-III/DNMS/DB |
| References | |
| EP WHB-111-1 | |
| Download: ML073170377 (14) | |
Text
Survey Unit Release Record I Design # 1 EP-WHB-111-1 I Revision#
1 Original I Page 1 of 3 2) EP WHB-111-1 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.
Survey Unit #(s) 3) Surveys in EP WHB-111-1 were performed using a scintillation detector optimized to measure gamma energies representative of (3-137. Sample #EP 3-3 from Survey Request (SR)-13 was referenced for this decision.
WHB-111-1
- 1) Embedded Pipe (EP) Survey Unit WHB-111-1 meets the definition of embedded pipe for Plum Brook Reactor Facility (PBRF).
- 5) Instrument efficiency determinations are developed in accordance with the BSIkVS-002, WEP 05-006, these determinations are appropriate for the types of radiation involved and the media being surveyed.
Description
- 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 acquisition of survey measurements Approval Signatures Date:
\, FSS Design
- EP WHB-111-1 Swey Unit: WHB-111-1
1.0 HistoryDeScription
1.1 The subject pipe system is the evaporator supply line located on the Waste Handling Building (WHB) -5' el. 1.2 EP WHB-111-1 consists of 2" diameter piping that is approximately 30 feet in length. 2.0 Survey Design Information 2.1 EP WHB-111-1 was surveyed IAW Procedure
- BSI/LVS-002.
2.2 1000/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 T' ID piping is 486 cm2 for 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 LocationsIData 3.1 Pipe interior radiological survey forms are provided in Attachment 2 of this release record. 4.0 Survey Unit Investigations/Results 4.1 None 5.0 Data Assessment Results 5 1 Data assessment results are provided in the EP/Buried Pipe (BP) Survey Report provided in Attachment
- 1. 5.2 All measurement results are less than the Derived Concentration Guideline Level (DCGL) for radionuclide specific EF' that corresponds to the 1 mrem/yr 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-111-1 passes FSS. 5.4 Background was not subtracted
&om the survey measurements and the Elevated Measurement Comparison (EMC) was not employed for this survey unit. Revision # Original Page 2 of 3
- FSS Design # EP WHB-111-1 Survey Unit. WHB-111-1
5.5 Statistical
Summary Table 6.0 Documentation of evaluations pertaining to compliance with the unrestricted use limit of 25 mredyr and dose contributions from Embedded Pipe and radionuclides contributing 10% in aggregate of the total dose for both structural scenarios and soils. 6.1 A review of the survey results has shown that the dose contribution for EP WHB-111-1 to be less than 1 Wyr. The dose contribution is estimated to be 0.014 mredyr based on the average of the actual gross counts measured.
7.0 Attachments
Attachment 1 - BSI EP/BP Survey Report Attachment 2 -Pipe Interior Radiological Survey Form Attachment 3 - DQA Worksheet Attachment 4 -Disc containing RR for EP WHB-111-1
& Spreadsheet Revision # Original Page 3 of 3 SECTION 7 ATTACHMENT 1 3 PAGE(S)
BSI EPIBP SURVEY REPORT Pa369 I no sled LUES NOT BACKGROUND CORRECTED RP Engtneer 1 Date EP WHB-111-1 2" Pipe TBD 06-004 Group 3.3 EP WHB-111-1 Z" Pipe TBD 06004 Group 3.3 . $(: Y MEAN 0.014 ----- MEDIAN - 0.013 STD DEV 0.008 MAX 0.035 MIN 0.009 gcpm ncpm CS-137 &Mty @&dm CI-IS7 .dlvity (d#Wl*o4 C0-M dvily Mnn-1 EM-162 sdMty (dptn'1OO~d)
Eu-184 KUvity (d#WlOOcn12)
Nb44 .c(ivlty ~dpndlWcm2)
Ag-1OBn activity (d#WlOkm2)
Unity SECTION 7 ATTACHMENT 2 3 PAGE(S)
Pipe Interior Radiological Survey Form BSI/LVSPipeCrawler-002 Revision 4 Date: $/z ~!OG Time: 1245 Pipe ID#: H R - 11 ( - 1 Pipe Diameter:
2" Access Point Area: EVA P ? IT Building:
w~ 6 Elevation:
-5' System: Ev&P sdPPLr' Type of Survey Investigation Characterization Final Survey )Q other v Gross C06O Cs v ---aF Detector ID# I Sled ID# 44 - 1 Sy 238'369 I I00 SLED Detector Cal Date: 3/6 18 G Detector Cal Due Date: Instnunent:
Z5bV-/ Instrument ID #: /BY*9+ Instrument Cal Date: 311 F/O 4 Instrument Cal Due Date:
31 / 5/67 From the Daily Pipe Survey Detector Control Form for the selected Detector Background Value 4 [ .' cpm MDCKmtic 2 Z CPm Efficiency Factor for Pipe Diameter 0, ODD (from detector efficiency determination) mcsmtic 4-4 s Is the MDCSbti, acceptable?
sample count time and recaiculate MD~~~~) Comments:
~UI P I PC 5 0 12 lJE 7 I???- 3 COW PLLnz Technician Signature
/ Pipe Interior Radiological Survey REFERENCE COPY 3 Package Page 1 of - Attachment 3, Page 1 BSIILVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form)
Date: 8/2<!06 Pipe ID#: H 6 I I I - . I. Pipe Diameter:
2," Access Point Area:
Evfl? P, i Building:
++ R ' Elevation: - System: EVM s~P~~LY Package Page &ofs Attachment 3, Page 2
SECTION 7 ATTACHMENT 3 I PAGE(S)
I DQA Check Sheet I Design # WHB-111-1 Revision # Original Suwey Unit # WHB-111-1 Preliminary Data Review' Answers to the following questions should be fully documented in the Suwey Unit Release Record Yes No NIA 1. Have survevs been ~eriormed in accordance with survev instructions in the Survev Desion?
1x1 - I I I 2. Is the instrumentation MDC for structure static measurements below the DCGLw for Class 1 and 2 survev units. or below 0.5 DCGLW for Class 3 survev units? X 3. Is the instrumentation MDC for ernbeddedlburied piping static measurements below the DCGLw ? X 4. Was the instrumentation MDC for St~dure scan measurements, soil scan measurements, and embeddedlburied oi~ina scan measurements belowthe DCGLw or. if not was the need for additional I I IX ,. - static measurements or soil samples addressed in the survey design? 5. Was the instrumentation MDC for volumetric measurements and smear analysis c 10% DCGLw? X 6. Were the MDCs and assumptions used to develop them appropriate for the instruments and techniques used to perform the survey? 7. Were the survey methods used to collect data properforthe types of radiation involved and for the media beina surveved?
X 8. Were "Special Methods" for data collection properly applied for the survey unit under review? 1x1 I 9. Is the data set comprised of qualified measurement resutts collected in accordance with the survey design, whlch accurately reflects the radiological status of the facility7 X Graphical Data Review 1. Has a posting plot been created? I I I x 2. Has a histogram (or other frequency plot) been created? I I I x 3. Have other graphical data tools been created to assist in analyzing the data? X 1 Data Analysis 1 1. Are all sample measurements below the DCGLw (Class 1 8 2), or 0.5 DCGLw (Class 3)? X 2. Is the mean of the sample data < DCGLW? X 3. If elevated areas have been identified by scans andlor sampling, is the average activity in each elevated area < DCGk (Class I), s DCGLw (Class 2), or c0.5 DCGLw (Class 3)? X 4. Is the resuli of the Elevated Measurements Test < 1.0? X 5. Is the result of the statistical test (S+ for Sign Test or W, for WRS Test) >the critical value? X I Comments:
Page 1 of 1 SECTION 7 ATTACKMENT 4 1 DISC