ML073170389

Survey Unit Release Record EP 1.71

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

Description

2) EP 1.71 is a Class I, Group 2 sv unit as perthe PBRF Find Status Survey Ph (FSSP) and Technical Basis Document WD)-06-004.

3) Surveys in EP 1.71 were performed wing a scintilintion dm opthhd to measure gamma energies representative of Co-60. Sample #EP2-5 from Suwey Request (SR)-13 as re&mce.d for tbis decision-acquisition of survey measmmen&.

5) Instmmetrt eficiency dekmhtions 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.

CS-09) 1

" - FSS Design # EP 1.71 Swey Unit: 1.71 1 .O History~scription 1 1 The subject pipe system is the 2" hot drain pipe for Cad "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 of the Reactor Building.

1 -2 EP 1.7 1 consists of 2" dieter piping that is appmxhate1y 120 feet in length. 2.0 Survey Design Information 2-1 EP 1. .71 was surveyed IAW Procedure

1. 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 1 20 swey measurements.

2.3 Surface area for the 2" ID piping is 486 cm2 for each foot of piping, CO~~ 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 Swey 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 of the FSSP. men implementing the Unity Rule, provided in Section 3.6.3 of 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. .< Revision # Original Page 2 of 3

-. .., - FSS Design#EP 1.71 Revision # Ori@ Page 3 of 3 Survey Unit: 1 -7 1 5-5 Statistical Smmq Table 6.0 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 estkkdto be 0.01 3 mremlyr based on the average of the actual gross counts measured.

7.0 Attachments Attachment 1 - BST EPBP Swey Report Attachment 2 - Pipe Interior aadiofogicd Survey 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

1. 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) REFERENCE COP Package Page 3 of 3 Attachment 3, Page 2

Pipe Interior Radiological Survey Form L'3'9. 0G Date: Time: - //no Building:

-9 fi . Elevation: s Access Point Area: - L'? Ti2y~~~L\

System: f;7&$~$$~

4 fie >w;d Pipe Diameter:

7 ' PipeID# /. ? / Type of Survey ='ve"""P Characterization

-3 other / ~.':,i.-( 1 dkinch Sled Size Yq-L 3- 3/+, Detector:

Detector ID #: &aLf+J 3- (3-1 Cal Date: / [r 12 " 03- Cal Due Date: /I-, /7 - 0 Instrument:

gZT \ 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. OOOZ~ (taken from detector calibration certificate)

.-. 783 1, :. MDCstatiC dPm/l00cm2 Is the MDCstati, acceptable?

@- NO (if no, adjust sample count time and recalculate MDCR,,d ,(?A~~'uY',hii SdhJ "'/ Comments: - I .A. ----p,- Pipe Interior Radiological Survey '-2. **,* ,,, Radiological Survey Commenced:

Date: f *3 a -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 " -. -- --- Pipe ID # /,7/ -ro cud@ &#r , Type of Survey Investigation Characterization

(~inal Survev 1 Other < Sled Size 2 "\kby c ?aLc ch inch Detector:

Yv-Ld;L Detector ID #: $fld/~0 3 ~~'&/2/ Cal Date: /I- 17-05 Cal Due Date:

f 17-0 d - Instrument:

9350 -1 Instrument ID #: 212'233 Cal Date: / 7 cd5 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 1 g3'0 dPdl00~m2 Is the MDCsab, acceptable?

a No (~f no, adjust sample count tune and recalculate MDCRbuc) Comments:

do~~~~~~b~d

~'suR~L~'

Pipe Interior Radiological Survey Radiological Survey Commenced:

Date: 2

• Cb- 0 Tie: Or/ S/ Package Page 1 of 2 Attachment 3, Page 1 Pipe Interior Radiological Survey Form (Continuation Form)

REFERENCE COPY Package Page 2 of 3- Attachment 3, Page 2

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- C4r\;fk~ k4 Building:

Q-g Elevation: - LJ- System: CAJL&&~~~RR;~ - 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 v F+zo-~~-Db Detector Cal Due Date: 20- Kc&- a7 Instrument:

235-0-1 Instrument ID #: Z/ L Z73 Instrument Cal Date: // -r 7 - (I 5- 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-~fiew Pipe Interior Radiological survey REFERENCE COPY n Package Page 1 ofL Attachment 3, Page 1 V Pipe Interior Radiological Survey Form (Continuation Form) BSIILVSPipeCrawler-002 Revision 4 Date: 3 06 Pipe ID#: 1, 7 / Pipe Diameter:

L " Access Point Area:

-~j- crt/v~~ if Building:

Q g Elevation:

~ -z J- System: REFERENCE COPY Package Page of 3 Attachment 3, Page 2

SECTION 7 ATTACHMENT 3 1 PAGE(S)

Page 1 of 1 SECTION 7 ATTACHMENT 4 1 DISC