ML073330429
| ML073330429 | |
| Person / Time | |
|---|---|
| Site: | Plum Brook |
| Issue date: | 11/15/2007 |
| From: | US National Aeronautics & Space Admin (NASA) |
| To: | NRC/RGN-III/DNMS/DB |
| References | |
| EP-IT-13 | |
| Download: ML073330429 (12) | |
Text
Swvey Unit Release Recurd Wigu # EP-IT- 13 Whim# Original. Page I of 3 Survey Unit #(s) IT-13
- 1) Embedded Pipe (EP) Survey Unit IT-13 meets the Mnition of embedded pipe for Phim Brmk -tor Facility o.
- 2) EP lT-13 is a Class 1, Group 1 survey unit as per the PBRF Find Status Survey Plan @SSP) and Technical Basis Dmument (lBD)-6OU4.
- 3) Surveys in E;P IT-1 3 were performed using a scintillation detector optimized to measure gamma energies repmtative of Co-60. Sample #EP 3-9 from Survey Request (SR)-13 was refkremd for this decision.
- 4) Survey Instructions for this survey unit are incorpomed into and paformed in accordance with @AW)the Babcock Serviw Incorporated (BSr)/LVS-002, Work Eltecution Package (WEP)05-006. Survey insbudions described in this Description document mnsthte "SpeciJ Methods" and the survey design used in the acquisition of survey mmmemnts.
5 ) Instrument efficiency determinations are developed in accordance with the BSVLVS-002,WEP 05-006, these dekmktions are appropriate Eor the types of radiation involved and the media being surveyed.
FSSICharacteridon Engineer
FSS Design # EP IT-13 ~ s i o #owgml Page 2 of 3 S u r ~ e yUnit: IT-13 1.0 HhryDedption 1.1 The subject pipe system is a 4" diameter penetration 1acak.dadjmnt to the CRT plate within the Sub Pile Room. The system access point is located on the -34' el. of the Rx building.
1.2 EP IT-13 consists of 4" diameter piping that is approximately 3 feet in length.
2.0 Survey Design Information 2.1 EP IT-13 was sweyed IAW FVocedue #BSllLVS-002.
2.2 100% of the piping was accessible for survey. The accessible pipe was surveyed by static measurement at one foot increments, for a tad of 3 survey measumnents.
2.3 The total surface area for the piping system is approximately 2,919 cm2 (0.3 m2)for the entire length of (3') of piping.
3.0 Survey Unit Measurement Locationfita 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 Asmssment Results 5.1 Data assessment results are provided in the EPBuriad Pipe (BP) Survey Report provided in Attachment 1.
5.2 All measurement results are less than the Derived Concentration Guideline Level @CGL) for radionuclide specific EP that corresponds to the 1 mredyr dose goal established in Table 3-3 of the FSSP.
5.3 When implementing the Unity Rde, provided in Section 3 -6.3 of the FSSP, and applying the Nuclide Fraction fNF), provided in TBD-06-004, the survey unit tbat is constituted by EP IT-13 gasses FSS.
5.4 Background was not subtracted from the survey m m m e n t s and the EIevated Mwuement Comparison (EMC) was not employed for this m e y unit.
FSS Daign # EP IT-13 Revision # O r i g M Page 3 of 3 Suwey Unit: IT-13 5,5 Statistical Summary Table 6.0 Documedon ofevaluations pemhhg to compliance with the unrestricted use limit of25 mmdyr and dose comibutions from Embedded Pipe and rdio~lll~lides contributing 10% in aggregate ofthe total dose for both s t r u d scenarios and soils.
6.1 A review ofthe survey results has s h m that the dose contribution for EP rr-13 to be less than 1 &yr. The dose contibution is dmated to be 0.037 mdyr b d on the average ofthe actual gross courrts measured.
7.0 Attachmefits Attachment 1 - BSI EPlSP S w e y Report Atbdmsent 2 - Pipe hterior Radiological S w e y Form Attachment 3 - DQA Worksfieet Attachment 4 --Disc containing RR fbr EP IT-13 & Spreadsheet
SECTION 7 ATTACHMENT 1 2 PAGE@)
BSI EPlsP SURVEY REPORT COMMENTS:
A C T W VALUES NOT BACKGROUND CORRECTED RP Engineer 1 I l - / Z -07
EP IT-13 4" Pipe TBD 06404 Group 1 I I carodvlty 1 - 1 i
C o 4 0 a d . M ~ Cs-fl?.clMty 1
Eu4s2actrvtty m1-,
Eu-W.eav*y
(
-I i -activity tdW4-1 WmdvQ
~ W I ~
I
! t 1 6' 8 10,687 1,713 - 68 1 1,825 ? 432 50 12 0.010 2- 22' 22 81,111 8,281 249 5,- 1,584 183 4 0.037 3 37 37 102,37_8 10,504 419 10,021 2,064 308 - 74 0.083
---.-A MEAN 0.037
-.-- -MEDIAN i 0.037 I - ' -
-- -.,-.-a SEEr-l 0.026 MAX 0.083
SECTION 7 ATTACHMENT 2 z PAGE(@
BSVLVSPipeCrawler-002 Revision 5 Pipe Interior Radiological Survey Form lD~27~07 \I9 0 Date:
Pipc ID#: L
-. - -13
)
Time:
Pipe Diameter: .y " Access Point Area: Sh Building: - / Elevation: -'3Yi Systern:
Type of Survey Investigation ~huacterization Gross Co60 4 Cs Detector ID#I Sled ID# \ m&\ w % \o)
Detector Cal Date: - Detector Cal Due Date: \-\\-ox Instrument: Instrument I D#: !g?o?dl Instrument Cal Date: 1 - \ \ - 07 Inshument Cal Due Date: \ - 1) - 0 k Fmm the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 3 ,% cpln MDCRsmtlc I D cPm Efficiency Factor for Pipe Diameter (h detector efficiency determination) mcs~ic 3054 - dpm' ]a cm2 Is the MDGhtiC acceptable? @ No (if no, adjust sample count time and recalculate MDW,,,iJ comments: P 4 b f& I A ~ , \basl ~~-d,,&-,
Tech~ici an Signature Pipe Interior Radiological Survey Position Feet into Pipe Count Time Gross Counts Gross Net d p d l OOcmZ
- / from Opening (min) cpm cpm 1 I 1 b II I*
2 A x.9 22 I, I 3 3 37 37 3- 4 4
5 C 6
7 8 - - - -
9 10 -
Package Page 1 of5 REFERENCE COPY
.. Attachment 3, Page 1
SECTTON 7 ATTACHMENT 3 I PAGE@)
Page 1 of I SECTION 7 ATTACHMENT 4 1 DISC