ML073330670

EP-CRT-1, Nasa, Survey Unit Release Record

ML073330670
Person / Time
Site:	Plum Brook  File:National Aeronautics and Space Administration icon.png
Issue date:	11/15/2007
From:	US National Aeronautics & Space Admin (NASA)
To:	NRC/RGN-III/DNMS/DB
References
EP-CRT-1
Download: ML073330670 (12)

Text

Survey Unit Release Record Design #

EP-CRT-I Reviskn #

Originid Page 1 of 3 Suwey Unit #(s)

CRT-1

1) Embedded Pipe (EP) Survey Uait CRT-1 meets the definition of embedded pipe for Plum Bmk Reactor Facility (PBRF).

2) EP CBT-1 is a Chss 1, Group 1 survey unit as per the PBRF Find Status Survey Plan (FSSP) and Technical Basis Document (rsD)-06QW.

3) S U I V ~

in EP CRT-1 were performed using a scintillation detector optimized to measure gamma energies r e p r d v e of Co-0. Sample #EP 3-9 h m Suwey Request (SR)-

13 was refmend for this decision.

4) Survey Instrutions for this m e y unit are incorporated into and performed in mrdrsnce with (WW) the Bab&

Services Incorporated (BSIfiVS-002, Work Execution Package (WEP)05-006. Sumey i

~

~

o n

s described in this document constitute "Specid Me&&" and the survey design used in the acquisition of survey measurenents.

5 ) Instrument efficiency determimiom are developed in aceordana with the B SDLVS-002, WEP 05404, thm determinations are appropriate for the types of radiation involved and the media being surveyed.

Page 2 of3 Survey Unit CRT-1 1.0 HsmyIDesaiptim 1.1 The mbj ject pipe system is a 2.5" diameter penetration located on the CRT p

h within the Sub Pile ROOM. The system access paint is located on the

-34' el. ofthe Rx building.

1.2

~CRT-Iwnai~of2.5"~erpip~~isappmxim~ely?feetin length.

2 0 S u m y Design Information 2.1 EP CRT-1 was saweyed IAW Procedure #BSYLVS-Q02.

2.2 1 W o of the piping was awessibre for survey. The risible pipe was sumeyed by static measurement at one foot increments, for a t d of 3 S L u v e y m ~.

2.3 The total surface area for the piping system is approximstely 1,824 cd (0.2 mZ) fbr the entire length of (3') of piping.

3.0 Suwey Unit Measurement ~

~

t a

3.1 Pip interior radi01ogical mwq forms are provided in Anadmmt 2 of this release record 4.0 Survey Unit InveStigatio&esutts 4.1 None 5.0 Data Assessment R d t s 5-1 Data assessment results are provided in the EPBUried Pipe @P) Survey Report provided in Attachment I.

5.2 All measurement d t

s are less than the Derived -on Guideline Level @CGL) for radionuclide specific EP that corresponds to the 1 rnremlyr dose god 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 F d o n 0, provided in TBD-WO04, the survey unit that is constituted by EP CRT-1 passes FSS.

5.4 Background was not subtracted from the w e y mertilurements and the Elevated Measurement Comparison (EMC) was not employed for this m

y

unit,

Survey Unit: CRT-1 5.5 StatkicalSummetryTabfe 6.0 Dommmmion of evaluations pertaining to oomplislace with the wms&icted use Iimit of25 e r

md dose contributions &om Embedded Pipe d radimwlidcs contributing 1 00/a in -&ate of the total dose for both ~~

4 0

s and soils.

6.1 A r w i e w o f t h e ~ y ~ t s h h w n t h a t t h e d o ~ ~ b u t i o n ~ r E P CRT-1 to be Ias than I medyr. The dose contribution is estimated to be 0,034 m-em/yr based on the average of the a d i d gross m m t s meawrd.

7.0 Attachments

~ t t a h m e ~

I - Bsr E P ~ P s

w

~ e p ~ r t -

Interior Radi~logicd Survey Form - DQA Work&& -Disc containing RR for EP CRT-I & Spreadsheet

SECTION 7 ATTACRMENT 1 z

PAGE(S)

BSI EPlBP I U R V N REPORT TMlY VALU ES NOT BACKGROUND CORRECTED

EP CRT-1 2.5" Pipe TBD 06.004 Group 4 C a c e o ~

CS-437 adfvfty E u - M Z ~ ~ ~ I V Q EU-184eeCtvity M c l e f h r i f y 4-408maetlvQ (Patrlaprg

. W W l ~ )

WWloDand) W m dm-.

tdpnJ100Crrr2)

IdpnJlOoerr5) "*

I 1

7 7

21,212 3,488 138 3,309 880 1 02 2

0 0

3 27 27 81,318 13,456 533 f2,W 3,393 I 393 I

MEAN

!MEDIAN 0,021 STD DEV

--ma MAX 0. m 1

1 M IN 0.000

SECTION 7 ATTACHMENT 2 z PAGEIS)

BSL/LVSPip&rawler-002 Revision 5 Pipe Interior Radiological Survey Form Date:

1 b 0 7

~ime:

\\ b ar, Pipe ID#: LRT - \\

Pipe Diameter:

3,s" Access Point Area: ~

\\

p

?,\\, Rm Bui1din.g:

TXI Elevation:

-39' System:

. Type of Survey hv.estigation Characterization Finalsurvey %

Other \\/

Gross Co60 Cs Detector ID#

I Sled. ID#

/ dt SL$

DetectorCalDate:

\\ - \\ \\ - b T Detector Cal Due Date:

\\ - I \\ - 0 9 Instrument:

a3 5 b' - \\

Instrument ID #:

Instrument Cal Date:

\\ - 1 \\ - 0 7 Instrument Cal Due Date:

From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value 3.!!

cpm M X R s t r r t i c 10 cPm Efficiency Factor for Pipe Diameter 0.000 33 (from detector efficiency determination)

MDCstntic '

27

~

~

~

i f

~

~

d j

u s

t urnpli count i m aud iecalcolafe h m C k i j Xs the MDCghli, acceptable?

Comments: Ms-f

asr,

\\OPT, br*\\nL&

Technician Signature Pipe Interior Radiological Survey Package Page 1 df Z, Page 1

REFERENCE COPY u

SECTION 7 ATTACHMENT 3 I

PAGE(S)

DQA Check Sheet Design #

EP CRT-1 Revision #

Original Survey Unit #

EP-CRT-1 Pmliminary Data Review' Answers to the fottowing questions should be fully documented in the Survey Unit Yes No PUA Release Record I Have surveys been performed in accordance with survey instructions in the Survey Design?

X

2.

Is the instrumentation MDC for structure static measurements below the DCGh for Class I and 2 survey unb, or below 0.5 OCGbfor Class 3 survey unik?

X

3.

Is the instrumentation MDC for embeddedlburled piping static measurements Mow the D C G h ?

X

4.

W a s the instrumentation MDC for structure scan measurements. soil scan measuremwrts, 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 fw volumetric measurements and smear analysis < 10% D G L w ?

X

6. Were the MDCs and assumptions used to develop t h m appropriate for the Instruments and techniques used to perbnn the survey?

7.

Were the survey methods used to collect data proper for the types of radiation involved and for the media being surveyed?

8. Were "Speclal Methods* for data collection properly appld for the survey unit under review?

X

9.

Is the data set comprised of qualified measurement resub collected in accordance with the survey design, which accurately reflects the radiological status of the facility?

x Graphical Data Review

1.

Has a posting plot h n

created?

X

2.

Has a histogram (or other frequency plot) been created?

X

3.

Have other graphical data tools k n

created to assist in analyzing the data?

X Data Analysts

1. Are all sample measurements below the DCGLW (Class 1 & 2), or 0.5 DCGLW (Class 3)?

X

2.

Is the mean ot the sample data e DCGL?

X

3.

If elevated areas have been Identified by scans andlor sampling, is the average activdy in each elevated area < D C G k (Class I],

i DCGLw (Class 21, or 4. 5 DCGLW (Class 3)?

X

4.

Istheresu~oftheElevatedMeasurmentsTestc 1.0?

X

5.

Is the result of the statiawl test (S+ fw Sign Test or W, for WRS Test) ?the critical value?

X Cornrn-:

CS-09/2

SECTION 7 ATTACHMENT 4 1 DISC