ML073170418
| ML073170418 | |
| Person / Time | |
|---|---|
| Site: | Plum Brook |
| Issue date: | 11/07/2007 |
| From: | US National Aeronautics & Space Admin (NASA) |
| To: | NRC/RGN-III/DNMS/DB |
| References | |
| EP Rx 043 | |
| Download: ML073170418 (17) | |
Text
Survey Uait Release Record -# EP-Rx 043 Survey Unit Ys) Mion # Rx 043 1) Embedded Pipe (EP) Swey Unit Rx 043 meets the ddnition of embedded pipe for Plum Brook Reactor Facility (PBRF). 2) EP Rx 043 is a Class 1, Group 1 survey unit as per the PBRF Final Status Survey Plan (FSSP) and Technical Basis Document (TBD)-W. 3) Surveys in EP Rx 043 were performed using a scintil1ation detector optimized to measum ma energies representative of Co-60, Sample #lP 3- 1 from Survey Request ($It)- 1 3 was rderenced for this decision.
- 4) Survey Tnstmctions for this survey unit are incorporated into and performed in accordance with (IAW) the Bhcock Services Incorporated (BSWVS-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.
- 5) hstnmmt efficiency det erminations am developed in accordance with the BSVLVS-002, WEP 05-006, these detdaiions are appropriate for the types of radiation involved tutd the media being surveyed.
Original Page 1 of 3 FSS ~esi~n # EP Rx 04; 1 1 Revision # Original Page 2 of 3 Smey Unit: Rx u43 1.0 Historyfllescription 1.1 The subject pipe system is a 6" service ring return line located on the -27' d. of the Rx building.
1.2 EB Rx 043 consists of 6" diameter piping that is approximately 46 feet in length. Survey Design Information 2.1 I3P Rx 043 was surveyed L4W Procedure
- BSIA,VS-002.
2.2 100% of the 6" ID pipe was accessible for swrey. The accessible 6" ID pipe was sumeyed by static measurement at one foot increments, for a total of 46 survey rnamrements.
2.3 Surface area for the 6" II3 piping is 1,459 cm2 for each foot of piping, compodhg to a total 6" a) piping surface area of 67,129 d (6.7 m2) for the entire length of (appmximately 46') of 6" piping, Survey Unit Measurement LocationslData 3.1 Pipe interior radiologicd mey forms are provided in Attachment 2 of this release record Survey Unit hvestigations/IlesuIts 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPBUtied Pipe (BP) Survey Report provided in Attachment
- 1. 5.2 MI measurement results are less than the Derived Concentration Guideline ZRVe1 WGL) for radioauc6de s~ec3c EP #hat cofiesponds to the 1 mredyr 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 0, provided in TBD-W, the survey unit that is constituted by EP Rx 043 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 Documentation of evaluations pertaining to compliance with the unrestricted use limit of 25 mredyr and dose contributions from Embedded Pipe and rsdhW contributing 1WA in aggregate of the total dose for bdh struchval scenarios and soils. 6.1 A review of the survey results has shown that the dose contribution for EP Rx 043 to be Iess tbEm 1 medyr. The ~OFE mntribution is estimated to be 0.049 mremlyr based on the average of tbe actual gross counts rnemured.
Amehments Attachment 1 - BSI EPBP Survey Report Attachment 2 - Pipe Interior Radiological Survey Form Attachment 3 -DQA Worksheet Attachment 4 -Disc containing RR for EP Rx 043 & Spreadsheet - - FSS Design # EP Rx 043 Revision # Original Page 3 of 3 1 smey Unit: Rx 043 SECTION 7 ATTACHMENT I 3 PAGE@)
IS1 EPlbP SURVEY REPORT LUES HOT BACKGROUIUD CORRECTED EP Rx 043 6" Plpe TBD 06-004 Group I
SECTION 7 ATTACHMENT 2 6 PAGE(S)
BSULVSPipeCrsrwler-002 Revision 4 Pipe Interior Radiological Sui~ey Form Date: 3*/3rd'd)
Time: c 8- 5 Pipe ID#: 0, ~3) ZX I~J' pipe Diameter:
4 '/ AccessPointArea:
'&7mF'm'~?f( Building:
=&L Tfi Elevation: - Zd System: \Jst~*ke~~~~~i~&
& V Type of Survey Investigation Characterization Final Survey 7( Other 4 Gross Co60 V' I cs - Detector ID# I Sled ID# /O b Detector Cal Date: / Cal Due Date: / 2- L 0 0 b Instrument:
a332 - 1 Instrument ID #: $034 Yti" Instrument Cal Date: / 7 J- 0 3( Instrument Czll Due Date: /y - fkbJ -& & From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value ' a cpm rnCKtatiC f cpm Efficiency Factor for Pipe Diameter n. ma (from detector efficiency determination)
~Csmic 33123 k the MDCmtic accqtablc? (if no, ndjust sample count time and recalculate MDCR+tPric)
Comments:
Technician Signatur Pipe Interior Radiological Survey Package Page 1 of Attachment 3, Page 1 BSVLVSPipeCrawler-002 Revision 4 Pipe ~nteribr Radiological Survey Form (Continuation Form) Date: 2
- pj Pjpc lP#: (/.+yj xx#fS Pipe Iliameter:
- 6. /{ Access Point Area: eJ 7 T;ZK+jc a- Building:
' TJ,&m% Elevation:
-- $5- System: Attachmmt 3, Page 2
BSTLVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: 7-l gL - 0 b Time: c? $30 b ({ mdcg PipeID#: (it~3)eK fl3 PipeDiameter:
AccessPointArea: - io Building:
KJ? Elevation:
-2 7 System: WICY s UCF ~TZZWZ d Type of Sumy Investigation - , jharactaLaiion , FMSwey $ Other < Gross ' Co60 cs *, Detector ID# 1 Sled ID# B)[@o hl [ N&/ /L VS-/ / 106 - Detector Cal Dale: / a- Z d - Detector Cal Due Date: / 2-p 2. 0 - 0 6 Instrument:
=ST-f Instnunent ID #: ZC=,3VB&3 Instrument CalDate: / /-/ 7-0 3- Instrument Cal Due Date: jf-/ 7- Q 6 From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 2 1 3 . cpm MDCR,~, 194 cpm Eficiency Factor for Pipe Diameter 6,00 6% (from detector efficiency determination) mcstalic 3343 dpd 03 cm2 IS mcabtiG acceptable?
@ NO (if no, adjust sample count time and recalculate MDCSd Technician Signature c . OCB i?&v/- Pipe Interior Radiological Survey -- REFERENCE COPY 9 Package Page 1 of - Attachment 3, Page I BSULVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form) me: 2-1 Y-06 rl Pipe ID#: c!,y3) aY 3 Pipe Diameter:
Access Point Area: mwff Bdd'zng: ..rC. Elevation: - 27 System: %\I r LF &G& &C-ZKA~ REFERENCE COPY 0 Package Page ?"of / Attachment 3, Page 2
SECTION 7 ATTACHMENT 3 1 PAGE@)
DQA Check Sheet Design # Rx 043 Revision # Original survey Unit # Rx 043 Preliminary Data Review' Answers to the following questions should be fully documented in the Sumey Unit Release Record Yes No NIA 1. Have surveys been performed in accordance wRh survey instructions in the Survey Design? X 2. Is the instrumentation MDC for structure static measurements betow the DCGLw for Class I and 2 survey units, or below 0.5 DCGLw for Class 3 survey units? X 3. Is the instrumentation MDC for embeddedlburied piping static measurements below the DCGLw ? X 4. Was the instrumentation MDC for structure scan measurements, soil scan measurements, and ernbeddedlburied piping scan measurements betow the DCGh, or, if not, was the need for additional X static measurements or soil samples addressed in the survey design? 5. Was the instrumentation MDC for volumetric measurements and smear analysis
< 10% DCGLw ? X 6. Were the MDCs and assumptions used to develop them appropriate for the instruments and techniques used to perfom the survey? 7. Were the survey methods used to collect data proper for the types of radiation involved and for the media being surveyed?
X 8. Were 'Speciai Methodsm for data collection properly applied 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 the radiological status of the facility?
X Graphical Data Review I I CS-09/2 Page 1 of 1 SECTION 7 ATTACHMENT 4 1 DISC