ML073170389
| ML073170389 | |
| 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 1.71 | |
| Download: ML073170389 (25) | |
Text
2) EP 1.71 is a Class I, Group 2 s v unit as perthe PBRF Find Status Survey P h (FSSP) and Technical Basis Document WD)-06-004.
- 3) Surveys in EP 1.71 were performed wing a scintilintion d mopthhd to measure gamma energies representative of Co-60. Sample #EP2-5 from Suwey Request (SR)-13 as re&mce.dfor tbis decision-Description acquisition of survey measmmen&.
5 ) Instmmetrt eficiency d e k m h t i o n s are developed in accordance with the BSL'LVS-002, WEP 05-086, these determinations are appropriate for the types of radiation involved and the media being surveyed.
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FSS Design # EP 1.71 Revision # Original Page 2 of 3 S w e y Unit: 1.71 1.O History~scription 11 The subject pipe system is the 2" hot drain pipe for C a d "H".Tbe function of this pipe was to convey water fkom the 2 inch riser in Canal "H"to the HD sump in Pump Room #22 on the -25' elevation ofthe Reactor Building.
1-2 EP 1.7 1 consists of 2" d i e t e r piping that is appmxhate1y 120 feet in length.
2.0 Survey Design Information 2-1 EP 1. .71 was surveyed IAW Procedure #BSVLVS-002.
2.2 100% 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 120 s w e y measurements.
2.3 Surface area for the 2" ID piping is 486 cm2for each foot of piping, C O to a total 2"~ID piping surface
~ area of 58,373 cm2(5.8 m2) for the entire length of (approximately 1 20') of 2"' piping.
3.0 S w e y Unit Measurement LocationslData 3.1 Pipe Mar radiological survey forms are provided in Attachment 2 of this release record.
4.0 Survey Unit InvestigationdResults 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPlBuried Pipe (BPI Survey Report provided in Attachment I .
5.2 ALL measurement results are less thttn the Derived Concentration Guideline Level @CGL) for radionuclide specific EP that corresponds to the 1 mdyr dose goal established in Table 3-3 ofthe FSSP.
m enimplementing the Unity Rule, provided in Section 3.6.3of the FSSP,and applying the Nuclide Fraction p), provided in TBD-06-004, the survey unit that is constituted by EP 1.71 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.
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FSS Design#EP 1.71 Revision # Ori@ Page 3 of 3 Survey Unit: 1 -71 5-5 Statistical S m m q Table 6.0
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- Documen&tion of evduations perta3Ilmg to compliance with the unrestricted use limit of 25 mredyr and dose wntributiom from Embedded Pipe md radionucIides contributing 10% in aggregate of the total dose %r both structural scenarios and soils.
6.1 A miw of the survey results has shown that the dose contribution for EP 1.71 to be lesstban 1 &. The dose cmtrihdon is e s t k k d t o be 0.013 mremlyr based on the average of the actual gross counts measured.
7.0 Attachments Attachment 1 - BST EPBP S w e y Report Attachment 2 - Pipe Interior aadiofogicdSurvey Form Attachment 3 - DQA Worksheet Attachment 4 -Disc containing RR for EP 1.71 8t Spreadskt
SECTION 7 ATTACHMENT 2 Ir PAGE(S)
BSI EPlBP SURVEY REPORT Detector-Sled#
LUESNOTBACKGROUNDCORRECTED RP Engineer I Date
EP 1.71 2" Pipe TBD 06-004 Group 2
SECTION 7 ATTACEWLENT 2 12 PAGE(S)
Pipe Interior Radiological Suwey Form (Continuation 'Form)
Package Page 3of 3 REFERENCE COP Attachment 3, Page 2
Pipe Interior Radiological Survey Form Date: L'3'9. 0 G Time: - //no Building: -9 f i . Elevation: s Access Point Area: - L'?T i 2 y ~ ~ ~ L 4
System: f;7&$~$$~ fie >w;d Pipe Diameter: 7 ' PipeID# /. ?/
- 3 Type of Survey Sled Size ='ve"""P
~.':,i. 1 -( d k i n c h Characterization other /
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Detector: Yq-L 3- Detector ID #: &aLf+J 3- (3-1 Cal Date: / 12 " 03- Cal Due Date: /I-, / 7 -
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[r 0 Instrument: gZT-0 \ Instrument ID #: % ( 33-37 Cal Date: / / - / 7- c > 5 Cal Due Date: ((: 13 ,.rC From the Daily Pipe Survey Detector Control Form for the Selected Detector . .
Background Value 7 cpm;",
t.
%. :
MDCRstatii, 11.3 cpm z Efficiency Factor for Pipe Diameter 6. O O O Z ~ (taken from detector calibration certificate) .-.
- . MDCstatiC 783 1, dPm/l00cm2 Is the MDCstati,acceptable? @-NO (if no, adjust sample count time and recalculate MDCR,,d Comments: ,(?A~~'uY',hii
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Pipe Interior Radiological Survey
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Radiological Survey Commenced: Date: f *3a -0 Time: /I b Package Page 1 of 2 Attacwent 3, Page 1
Pipe Interior Radiological Survey Form Date: 6-0 6 Time: D R'fS Building: T£kc~- Elevation: - LJ- Access Point Area: -31 meodd rdm@
fx0.u su,+
System: M4-r-H+$+&;J Pipe Diameter: 7 " -.
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Pipe ID # /,7/ -ro c u d @ &#r
,
Type of Survey Investigation Characterization (~inal Survev 1 Other <
Sled Size 2 "\kby c ?aLc c h inch Detector: Yv-Ld;L Detector ID #: $ f l d / ~ 0 3 ~ ~ ' & / 2 /
Cal Date: / I 05
- Cal Due Date: f 17-0 d Instrument: 9350 -1 Instrument ID #: 212'233 Cal Date: / 7 c d 5 Cal Due Date: 11 - 17.bG From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 5 cpm MDCRstIc /& 7 cpm Efficiency Factor for Pipe Diameter ~),OWW (taken from detector calibration certificate)
MDCstatlc 1g3'0 dPdl00~m2 Is the MDCsab, acceptable?
Comments: d o ~
a ~ ~~
No
' s u~R ~ ~
f adjust sample count tune and recalculate MDCRbuc)
( ~no, L ~ '~ b ~ d Pipe Interior Radiological Survey Radiological Survey Commenced: Date: 2 Cb-
- 0 Tie: O r / S/
Package Page 1 of 2 Attachment 3, Page 1
Pipe Interior Radiological Survey Form (Continuation Form)
Package Page 2of-3 Attachment 3, Page 2 REFERENCE COPY
BSYLVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form Date: 3-q-Ob Time: l o&(
Pipe ID#: /. 7/ Pipe Diameter: 25 Access Point Area: 5- C 4 r \ ; f k ~k4 Building: Q-g Elevation: - LJ- System: C A J L & & -~ ~ ~ R R Type of Survey Investigation Characterization Final Survey , Other 1 Gross C06O J Cs Detector ID# I Sled ID# 4 - &Z/J-QS~/ NO c $ L . ~
Detector Cal Date: 1 vF + z o - ~ ~ - D bDetector Cal Due Date: 20- Kc&- a 7 Instrument: 235-0-1 Instrument ID #: Z/ L Z 7 3 Instrument Cal Date: // -r 7 - (I5- Instrument Cal Due Date: //-/7-8 Q From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value i 9, I cpm MDCRsmic I , $ , "/pm Efficiency Factor for Pipe Diameter 0. 0003 8- (from detector efficiency determination) hlDCstatie 3443 d~m/ 1- cm2 Is the MDCStati,acceptable? NO (ifno, adjust sample count time and recalculate MDCR,,,ti,)
Comments:
Ca/nDr 157-6 Techmcian Signature r ..h t - ~ f i e w Pipe Interior Radiological survey Package Page 1 o f L n REFERENCE COPY Attachment 3, Page 1
V BSIILVSPipeCrawler-002 Revision 4 Pipe Interior Radiological Survey Form (Continuation Form)
Date: 3-9-0 6 Pipe ID#: 1,7 / Pipe Diameter: L " Access Point Area: -~j- crt/v~ if ~
Building: Qg Elevation: ~ -zJ- System:
Package Page of 3 REFERENCE COPY Attachment 3, Page 2
SECTION 7 ATTACHMENT 3 1 PAGE(S)
Page 1 of 1 SECTION 7 ATTACHMENT 4 1 DISC