ML081270703

From kanterella
Jump to navigation Jump to search
Survey Unit Release Record EP-ED-1
ML081270703
Person / Time
Site: Plum Brook
Issue date: 05/01/2008
From:
US National Aeronautics & Space Admin (NASA), John H. Glenn Research Ctr at Lewis Field
To:
NRC/RGN-III/DNMS/DB
References
EP-ED-1
Download: ML081270703 (12)
v • d • e


Text

  • Survey Unit Release Record Design # EP-ED-l Revision # 1 Page 1 or/'<5 Survey Unit #(s) ED-l I) Embedded Pipe (EP) Survey Unit ED-I was remediated and surveyed in December of2007 as Embedded Pipe, at that time meeting the definition of embedded pipe as per the PBRF Final Status Survey Plan (FSSP). All measurement results were less than the Derived Concentration Guideline Level (DCGL) for radionuclide specific EP that corresponds to the I mrem/yr dose goal established in Table 3-3 of the FSSP. This survey was documented in Revision 0 of this Release Record.
2) Since December of2007, the envisioned end-state configuration of the Primary Pump House (PPH) was revised. Subsequently, the portions of Embedded Pipe (EP) Survey Unit ED-I which transits in soil under and between the buildings no longer meets the criteria for embedded piping. The portions of Embedded Pipe (EP) Survey Unit ED-1 that are embedded in the building foundation walls (PPH and Hot Pipe Tunnel) remain classified as embedded pipe.
3) This FSS survey documented in Revision I of this release record was performed after the performance of additional remediation to this system. Upon demonstration of compliance with the release criteria, the complete piping system will be grouted, including the portions embedded in the building structure that will remain embedded for any future reuse and those Description portions in the ground that can be released for Wlfestricted use.
4) EP ED-1 is a Class 1, Group 1 survey unit as per the PBRF Final Status Sw"Vey Plan (FSSP) and Tech.nical Basis Document (TBD)-06-004.
5) Surveys in EP ED-I were performed using a scintillation detector optimized to measure gamma energies representative of Co-60. Sample #EP 3-7 from Survey Request (SR)-13 was referenced for this decision.
6) Survey Instructions for this survey unit are incorporated into and performed in accordance with (lAW) the Babcock Services Incorporated (BSI)/LYS-002, Work Execution Package (WEP)05-006. Survey instructions described in this document constitute "Special Methods" and the survey design used in the acquisition of survey measurements.
7) Instrument efficiency determinations are developed in accordance with the BSIILYS-002, WEP 05-006, these determinations are appropriate for the types of radiation inVOlved and the media being surveyed.

Approval Signatures Date:

FS S/Characterization Engineer ~ ~ D Wojtkowiak 04/08/08

~:; ~

Technical Reviewer (FSS/Characterization Engineer)

FSS/Characterization Manager Form CS-09/J Rev 0

<-------r--at:====:=::==::====__

FSS Design # EP ED-l I Revision # 1 -, Page 2 of3 Survey Unit: E -1 1.0 HistorylDescription 1.1 The subject pipe system is a 1.5" drain line section located in Room 8 of the Primary Pwnp House (PPH). The system is accessed from the 0' el.

1.2 EP ED-l consists of 1.5" diameter piping that is approximately 10 feet in length.

2.0 Survey Design Information 2.1 EP ED-l was surveyed lAW Procedure #BSIILYS-002.

2.2 100% of the 105"10 pipe was accessible for survey. The accessible IS' ill pipe was surveyed by static measurement at one foot increments, for a total of 10 survey measurements.

2 2.3 Surface area for the 1.5" 10 piping is 365 cm for each foot of piping, 2 2 corresponding to a total 1.5" 10 piping surface area of 3,648 cm (0.4 m )

for the entire length of (approximately 10') of IS' 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 InvestigationslResults 4.1 None 5.0 Data Assessment Results 5.1 Data assessment results are provided in the EPlBuried Pipe (BP) Survey Report provided in Attachment 1.

5.2 This survey unit was assessed as a building re-use scenario with all activity derived dose as a 100% C0 60 nuclide distribution. This is the most 2

conservative DCGL for the facility (11,000 dpm/l00cm ).

5.3 No individual measurement observed in EP ED-l exceeded the Unity Rule as provided in Section 3.6.3 of the FSSP. No Elevated Measurement Comparisons (EMC) was required or performed. The survey unit that is constituted by EP ED-l passes FSS. Mean unity for this survey unit was 0.376 of unity.

5.4 DCGL's for the building reuse scenario are used to demonstrate compliance with the release criterion for this release record. The DCGL's for embedded pipe are not applied.

5.5 No area factors were used for this survey unit.

5.6 Background was not subtracted from the survey measurements.

FSS Design # EP ED-l t:===;:I=R=e=v=iS='i=on=#=1=======~--p-a-g-e-3-o-f-3--'

Survey Unit: ED-l 5.7 Statistical Summary Table Statistical Parameter 1.5" Pipe Total Number of Survey Measurements 10 Number of Measurements >MDC 3 Number of Measurements Above 50% ofDCGL 2 Number of Measurements Above DCGL o Mean 0.376 Median 0.294 Standard Deviation 0.255 Maximum 0.997 Minimum 0.136 6.0 Documentation of evaluations pertaining to compliance with the unrestricted use limit of 25 mremlyr and dose contributions from Embedded Pipe and radionuclides contributing 10% in aggregate of the total dose for both structural scenarios and soils.

6.1 A review of the survey results has shown that the dose contribution for EP ED-l to be less than 25 mremlyr. The dose contribution is estimated to be 9.40 mremlyr based on the average of the actual gross counts measured.

7.0 Attachments Attachment 1 - BSI EPIBP Survey Report Attachment 2 - Pipe Interior Radiological Survey Form Attachment 3 - DQA Worksheet Attachment 4 - Disc containing RR for EP ED-l & Spreadsheet

SECTION 7 ATTACHMENT 1 2 PAGES

JtDlj( BSI EP/BP SURVEY REPORT Pipe 10 ED-1 Survey Location PPH Rm 8' 0' ft. el.

Survey Date 25-Mar-08 2350-1 # 203438 Survey Time 15:20 Detector-Sled # 44-159 238367/no sled Pipe Size 1.5" Detector Efficiency 0.00055 DCGL (dpml1DDcm2) 1.10E+04 Pipe Area Incorporated by Detector Efficiency (in cm2) 365 Pipe Area Incorporated by Survev Data 1m" 0.4 Field BKG (cpm) 12 Routine Survey X Field MDCR (cpm) 7 QA Survey Nominal MDC (dpml1DOcm2) 3,600 Survey Measurement Results Total Number of Survey Measurements 10 Number of Measurements >MDC 3 Number of Measurements Above 50% DCGL 2 Number of Measurements Above DCGL 0 Mean 0.376 Median 0.294 Standard Deviation 0.255 Maximum 0.997 Minimum 0.136 Russell Phelps Survey Technician(s)

Survey Unit Classification 1 TBD 06-004 Piping Group 1 SR-13 Radionuclide Distribution Sample EP 3-7 Measured Nuclide Co-60 Area Factor/EMC Used No Pass/Fail FSS Pass MREMIYR Contribution <25 COMMENTS:

ACTIVITY VALUES NOT BACKGROUND CORRECTED RP Engineer I Date

~ D. Wojtkowiak - 4/8/2008 5/1/2008

  • EP ED-1 Revision 1 1.5 11 Pipe

...c:

~

IV E Co-GO activity Co-GO activity IV

l gcpm ncpm (total dpm) (dpm/100cm2)

Unity III III IV 1 3 3 5,455 1,495 0.136 2 7 7 12,727 3,489 0.317 3 6 6 10,909 2,990 0.272 4 7 7 12,727 3,489 0.317 5 10 10 18,182 4,984 0.453 6 5 5 9,091 2,492 0.227 7 6 6 10,909 2,990 0.272 8 4 4 7,273 1,993 0181 9 13 13 23,636 6,479 0.589 10 22 22 40,000 10,964 0.997

- -t---- -

-- j

.~-_.

MEAN MEDIAN 0.376 0.294 J

_._-~

_.~

I STD DEV 0.255

-- I ---- - ---

0.997 MAX

-i- I MIN 0.136 1 of 1

SECTION 7 ATTACHMENT 2 2 PAGES

  • Pipe Interior Radiological Survey Form
  • BSI/LVSPipeCrawler-002 Revision 5 Date: 3'd.- s *oa Time: rSJ-o

/.. d.. 2" . Access Point Area: PPI1 <<I'M. 0 I '

Pipe ID#: f 0 -I Pipe Diameter:

Building: e p I--f Elevation: 0 System: ---'-p---=D'----- _

Type of Survey Investigation Characterization Final Survey r Other C Gross Co60 ~. Cs Detector ID# / Sled ID# ;;:<, 18 3t Z- .2-1 L{ - I S~ q / ---'-(l--'---"'-O~-S=_-_(I2=J _

Detector Cal Date: 10' /6* 0 7 Detector Cal Due Date: I 0 - ({, o?

Instrument: ~ 3j CJ"-/ Instrument ID #:  ;).. 0 3 Cf ~ r Instrument Cal Date: I () - r 6, 0 7 Instrument Cal Due Date: I (). I.{ 'CJ ~

---"---=-------'-----

From the Daily Pipe Survey Detector Control Form for the Selected Detector Background Value t-..l. cpm MDCRstatic 1 cpm Efficiency'Factor for Pipe Diameter 8, 000..6'3' (from detector efficiency determination)

MDCstatic ,:3bOD~. I DC) cm 2

Is the MDCstatic acceptable? ~ No (if no, adjust sample count time and recalculate MDCRstatic)

Comments:

Pipe Interior Radiological Survey Technician Signature ~AIJd&1A, ar-Position Feet into Pipe Count Time Gross Net Gross Counts dpm/lOOcm 2

  1. from Opening (min) cpm cpm 1 I l 3 -3 - /

2 ) / 7 7 /

3 ~ / b 0 /

1 4 .t.-( ( 7  ? /'

i 5 S \ LO 10 }JVA 6 b \ :J S /

7 '7 \ r:. () /

8 ~ ir[ '1 /

9 q , I /3 [3 /

10 (0 ~~ ..:J..l /

Package Page 1 of J-.

REFERENCE COpy Attachment 3, Page 1

_ _ ._ _ ~-----c-,-

or*"T";; ~~~~SVMP O~A'N ~

~ 'I S

V.t:.L~II.~"./

Cl

~~ ~ 'I

~ HD-A I 0'

__ I

~ ~

,\ F,u, >Q.

vr:.ION/ZE:R Ro6M tv~ ~ . . .. . ...."0,....

"--1 oCo)

FLOo.Z r:=.L. 0 :..~'  ! ~

, w

".s E.O Co)

OJ!

0; zw I

<f E/... -5:"4-" a::

8 .:.4

. __. j , ,I

,_ ,.;.1- ~":_L~.

~ I

~: ~ .L-z.=..~

I I

'r'F.-3_.!:..O~r_

I (It'(V.SL.-B~/

- _.1...

TH RU

. 4"4> \40i t;>r;:;.i.:\N' .-!

W./.

~1Wll1PI p,.l

- ~ r;::

./

-, 'II ", "', " .

I II

\'.,

\\

\' { 4'~:rs '" 41Sf 5?? r\O..I;J7d?AA;M '1' I J I'~

I*.

\:

-h.:

I +

l:l: , . . . . . ff S""I

./ .:'\,.-----'r-*' *..*--.. *,*rI

\Sj
  • \!

1N\/. t=. L . - s ~ 4-/' ~ I <t:'-L - II:' ; , I - j / i ~

'~ ~~ -,"i-t"~;~A'::'~:"~; i \\ i I

~

~ ~ '--':::-.,.- -:

/'

" \.9 ,,' '.'-... ./

8 " . '1" fl:.C.!>II-l hJ..

P'F\N~:' 0' ,. 1;'0 I.  :;

  • ,r .. VR"'(--' _

~.'" . '-9

~1

  • .[ ...* 'Y l ""iI

,1 ...... .  :.- < .- .

-'Ny; ~Lo -3~/'.' ..

Q "

I ,_. . __.,

cf. E;.L - 4'-0)'" - , J:-:5:'__ ._.~ ' ~.' I . I-L!~

.J.-l~ r;.'~ ~)I' 1:.....-_

THRU WACl..) I _... '-"': )

',' r" I - r.... _9i

~._._-'-'--;.......::.-=--=.=.=._= ::  :., _-- .._.-..._ :. ~: I

"=:l "Vr::."";

"""1""-- -~ .~

-- ---------*--*---'1-

""~. ~

[

I ~_f'("If, . ~-:-~1 tEL;-4""" I I I -'-.L-_~~ ,

-~I -.L _~

£

~.

I

?~ 4> .J  :.

~

I PF-OO{J ~

SECTION 7 ATTACHMENT 3 1 PAGE

DQA Check Sheet Design # EP ED-1 I Revision # I 1 I

Survey Unit # EP ED-1 Preliminary Data Review' Answers to the following questions should be fully documented in the Survey Unit Yes No N/A Release Record 1 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 OCGL w for Class 1 and 2 X

I survey units, or below 0.5 DCGLw for Class 3 survey units?

3. Is the instrumentation MOC for embedded/buried piping static measurements below the DCGLw ? X
4. Was the instrumentation MDC for structure scan measurements, soil scan measurements, and embedded/buried 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% OCGL w ? X
6. Were the MDCs and assumptions used to develop them appropriate for the instruments and techniques X

used to perform the survey?

7. Were the survey methods used to collect data proper for the types of radiation involved and for the X

media being surveyed?

8. Were "Special Methods" for data collection properly applied for the survey unit under review? X
9. Is the data set comprised of qualified measurement results collected in accordance with the survey X

design, which accurately reflects the radiological status of the facility?

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 Data Analysis
1. Are all sample measurements below the DCGL w (Class 1 & 2), or 0.5 DCGL w (Class 3)? X
2. Is the mean of the sample data < DCGLw? X
3. If elevated areas have been identified by scans and/or sampling, is the average activity in each X

elevated area < DCGLEMc (Class 1), < DCGLw (Class 2), or <0.5 DCGLw (Class 3)?

4. Is the result of the Elevated Measurements Test < 1.0? X
5. Is the result of the statistical test (5+ for Sign Test or W, for WRS Test).:: the critical value? X Comments:

o Wojtkowiak

~

FSS/Characterization Engineer (prinUsign) Date 04/08/08 FSS/ Characterization Manager (prinUsign) R. Case

/fJ!

L-./ .

Date S/;!dt Form CS-09/2 Page 1 of 1 Rev 0

SECTION 7 A TACHMENT4 1 DISC

Retrieved from "https://kanterella.com/w/index.php?title=ML081270703&oldid=2569755"