ML073330420

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EP-IT-14, Nasa, Survey Unit Release Record
ML073330420
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-14
Download: ML073330420 (12)
v • d • e


Text

Survey Unit Release Record 1 Wi# m-JT- 14 Survey Unit #(s) IT-14 I) W d e d Pipe (EP)Survey Unit IT-14 meets the &hition of embedded pipe fbr Plum Brook Reactor Fuility (PBRF).

2) EP IT-14 is a Class I, Group 1 survey unit as per the PBRF Final Status Survey P h @SSP) and Technical Basis Document (TBD)o6-004.
3) Surveys in EP IT-14 were perfbrmed using a scintiIlation detector optimized to measure gamma ener8ies representative of Cod0. Sample #EP 3-9 Eom S w e y Request (SR)-13 was referaced for this decision.
4) Survey Instructions for this survey uJlit are inmpmated into and perhrmed in accordance with (LAW) the Babwck Wccs Incorporated @SI)/LVS-002, Work Execution Package (WEP)05-006. Survey instructions +bed in this Description document d t u t e "Special Methods" and the survey design used in the acquisition of survey measurements.

5 ) Instrument efficiency determinations are developed in accordance with the BSWS-002, WEP 05-006, these determinations we appropriate for the types ofradiation involved and the media bein8 surveyed,

FSS Design # EP lT-14 Revision # Otiginal Page 2 of 3 Survey Unit: IT-14 1.0 Historyhscription 1.1. The subject pipe system is a 4" diameter penetration located adjacent to the CRT piate within the Sub Pile Room The system access p i n t is located on the -34' el. of the Rx building.

1.2 EP IT-I4 consists of 4" diameter piping that is approximately 3 feet in length.

Survey Design hfbnnation 2.1 EF IT-14 was surveyed IAW Procedure #BSIILVS-002.

2.2 1W?ofthe piping was accessible for SUrYey. The accessible pipe was surveyed by static rnefmrment at one fbat hcrements, hr a t d of 3 s w e y measurements.

2.3 Thstotal&~anafortkpipingsystemisappr~1y2,919cmZ (0.3 m2)for the entire imgth of (3') of piping.

3.0 Survey Unit Measurement LoCationslData 3.1 Pipe interior radiological survey forms are provided in Attachment 2 of this release record.

4.0 Survey Unit Imestigatio&suZts 4.1 None 5.0 Data Assessment Resuh 5.1 Data assessment results ace provided in the EPlBuriad Pipe @P) Survey Report provided in Attachment 1.

5.2 All measurement m l t s are less than the M v e d Concentrafion Guideline Level @CGL) for radionuclide specific EP that corresponds to the 1 memlyr dose god established in Table 3-3 ofthe FSSP.

5 -3 When implementing the Unity Rule, provided in Section 3.6.3 ofthe FSW,and applying the Nuelide Fraction (?PI, provided ia TBD-06-004, the survey unit that is constitutedby EP IT-14passes FSS.

5.4 Background was not subtracted &om the survey mmsuTeMerrts and the Elevated Measurement Compariwn @MC) was not employed for this mrvey unit.

FSS Design # EP IT-14 Revision # Orrginal Page 3 o f 3 Survey Unit: IT-14 5.5 S W i d Summary Table 6.0 Documentation of evaluations pertaining to compliance with the &cted use limit of 25 rnremlyr and b s e contributions from Embedded Pipe and d.omrclides contributing 10% in aggregate of the total dose for both ~~

scenarios and soils, 6.1 A review of the survey Wtsbas shown that the dose condribution fur EP TT-14to be less than 1 mredyr. The dose contribution is &mared to be 0.058 mrendyr based on the average ofthe actual gross counts measured.

7.0 Attachments Attachment I - BSI EPBP S w e y Report Attachment 2 - Pipe Interior Radiological Survey Form Attachment 3 - DQA Worksheet Attachment 4 -Disc codriivg RR for EP IT-14 & Spreadsheet

SECTION 7 ATTACHMENT 1 PAGE(S)

BSI EPlSP SURVEY REPORT COMMENTS:

ACTMTY VALUES NOT BACKGROUND CORRECTED RPEngirw~lMe

EP IT-14 4" Pipe T8D 06-0014 Group t W

ICT C o r n activity Cog0 activity Cs-137 activity Eu-16%amity Eu-164activity Nb-84 achity 3 77 77 2f3,889 21,985 1 871 20,855 5,544 642 ! 153 0.731

1

-- 1 MEAN 0.058 MEDIAN -0.029 I

i 1

4 I I 1 !I STD DEV MAX 0.064 0.131

?

t I [FAIN 0.01Q

SECTION 7 ATTACHMENT 2 Z PAGE(S)

Pipe Interior IRwdiaIogicd Survey Form Date: 1O-aC1-bT Time: IM'I Pipe ID#: , T T J \q Pipe Diameter: LJ p Ace& Point Area: - S&

Building: C. Elevation; -Y\' System:

Type of Survey Gross Investigation Characterization Final Survey Cs

,x Other Detector ID# I Sled ID# - 1 o \o \

1- \I -07 k I

Detector Cal Date: Detector Cal Due Date: \- \\-b Instrument: DSD-\ Instrument IDfi: 1h9 b4Y Instrument Cal Date: \ - \ \ -07 ~nstrummtcd D UD&: ~ ) - 1\ - 0 1 From the Daily Pipe Survey Detector Control Foml for the Selected Detector Background Value 3 ,y cprn MJ3C&falic lo m Efficiency Factor for Pipe Diameter 0-00 O& (from detector efficiency determination)

MD&& 3054 dpm/, 1 fl cm2 IS the MIXnncacceptable?

comments: +

a NO (if no, adjust sample count time and recalculate MDC&&)

\ 0 090 Technician Signature V Y .

Pipe Interior Radiological Survey Package Page 1 of 4 REFERENCE COPY Attachment 3, Page 1

SECTION 7 ATTACHMENT 3 1 PAGE(S)

DQA Check Sheet Design # EP IT-14 Revision # Original p P Survey Unit # EP IT-I 4 Preliminary Orrta Review' Answers to the fdtowing questions should be fully documented in the Survey Unit Release Record Yes No MA

1. Have surveys been performed in accordance with survey instructions in the Survey Design? X
2. Is the instrumentation MDC for structure static mmsurements below the D C G k for Class 1 and 2 survey units, or below 0.5 DCGLWfor Class 3 suwey units?

X

3. Is the instrumentation MDC for embeddsdlburid piping static measurements below the D C G k ? X
4. Was the instrumentationMDC for structure scan measurements, soil scan measurements, and embeddedlburied piping scan measurements below the DCGLw, 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% DCGLW3 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 proper far the types of radiation involved and for the X media being surveyed?
8. WerehSpecial Methods" for data collection properly applied for the survey unit under review? X
9. Is the data set compsrsed of qualified measurement results collected in accordance with the survey X design, which accurately reflects the radiological status of the faciliw Graphical Data Review
1. Has a posting plot been created? X
2. Has a histogram (or other frequency plot) been created? X
3. Have other graphical data tools been created to assist in analyzing the data? X A

Data Analysis

1. Are all sample measurements below the DCGLw (Class 1 & 2), or 0.5 DCGLw (Class 3)? X
2. Is the mean of the sample data < DCGCw? X
3. If elevated areas have been identified by scans andor sampling, is the average activity in each X elevated area c OCGLEMC(Uass I), c DCGLW(Class 21,or <0.5 DCGLw (Class 3 )
4. Is the result of the Elevated Measurements Test < I.Q? X CS4912 Page 1 of 1

SECTION 7 ATTACHMENT 4 1 DISC

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