Confirmatory Survey Building 4133 (HMTF)

Confirmatory Survey

Building 4133Hazardous Material Treatment Facility

(HMTF)

Santa Susana Field LaboratoryBoeing - Rocketdyne

Ventura County, California

Prepared By

Roger K. Lupo, Health Physicis t

Radiological Assessment Unit

Radiologic Health Branch

('onlirmatory Brine} of SSFt. BAR _A tV L'uilding 41 ; ;

Introductio n

The Department of Health Services . Radiologic Health Branch . received a verhal request from Boeing tosurvey the Building 41 33 located in Area IV of the Santa Susana Field I ahoratorv currently owned by

Boeing-Rocketdyne No written request for a confirmation survey has been received . Building 4133

(a.k .a. T1 33 . HWNIF . Hazardous Waste Management Facility) was built to treat non-radioactivitysodium and NaK (sodium potassium mix) fromnon -radioactive test loops and secondary sodium loops .

The 4133 site area and structures are a non-impacted area with no history of radioactive materials usage .A limited confirmatory survey was conducted by Radiologic Health Branch Staff on October 28 . 1999

with particular attention to be given to any elevated area found . The locations where elevated

measurements might be expected to be found would be inside the burn room and within the catch tank-, a sthese areas would be the primary location for any residue of material brought to the 4133 site fo rprocessing .

Survey

The limited confirmatory survey of Building 4133 consisted of gamma and exposure fate surveys of th e

majority of the site areas with an alpha/beta/gamma survey of the structures as described below :

• An exposure rate survey . one meter above the surface outside the site boundary fenced area an dextending 15 feet out from the fence .

.

An exposure rate survey . one meter from inside surfaces of the structures .

of the structures .An exposure rate survey . one meter above the surface area inside of the fenced area and outsid e

A gamma scan survey . using aNal 1 x 1 detector at no more than 12 inch above the surface of th e

area inside of the fenced perimeter and including 15 feet outside of the fenced perimeter,

inside the structures and the lower 2 meters of the interior and exterior surface of the walls .A gamma scan survey using a Nal lx 1 detector at no more than i/2 inch from the floor surface s

An Alpha-Beta- Gamma scanning survey, using a G-M pancake detector of the structures interio rfloor and 2 meter up the interior wall surface were performed .A soil sample collected down gradient from the site to determine the radioactive status of the soilthat would be impacted by any surface run off from the site .

Instruments

The instruments and detectors used du ring this survey are listed in Table 1 . The backgroundmeasurements collected for this survey are listed in Table 2 with the exception of an outsidemeasurement for the alpha /beta contamination scintillation detector used for direct measurements onsurfaces . Background measurements were made at Building 4039. an office building with no history ofradioactive materials usage .

Table 1 : Instruments Used in the Survey of Building 4133 .

Instrument /n ProbeModel

s/n ProbeType

CalibrationDate

Ludlum Model 3 158504 Ludlum 44-2 PR162272 1x1 Nal scint . 8/20/1999Ludlum Model 18 151891 Ludlum 44-9 PR163587 pancake G-M 8/19/1999Ludlum Model 2224 125592 Ludlum 43-89 PR123115 Alha/Beta scint . 9/17/1999Ludlum Model 19 80382 na na internal Nal 9/7/1999

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Table 2 : Instrument Background measurements .

InstrumentInstrument Background

( inside )Instrument Background

(outside )Ludlum Model 3 1800-2000 cpm 3000-3500 cpmLudlum Model 18 30-60 cpm 30-60 cpmLudlum Model 2224 1 alpha / 289 beta cpm naLudlum Model 19 6-8 R/hr 10-12 R/hr

Survey ResultsNo elevated radiation areas were found during the surveys of the structures . associated pits and catchtank. All measurements ere at similar levels as background measurements . The following figure sdocument the survey measurements in relation to the site andthe structures within .

Figure 1 Exposure Rate .

Figure 2 Gamma scan.Figure3 Surface contamination survey and exposure rate survey of the Control Room ,

Figure -4- Surface contamination survey and exposure rate survey of the Parts Spray /Burn Room ,

Tank .Figure 5 Surface contamination survey and exposure rate survey of the Scrubber Effluent Catch

One soil sample was collected down gradient from the site to determine theradioactive status of any soil

laboratory are similar to background soil samples co llected at various times prior to this survey .that may have been impacted by surface run off from the site . The soil concentrations reported by the

Soil Sample ResultsSample ID Gross Alpha Gross Beta Gamma SpecLocation pCi/g ± CE pCi/g ± CE Isotope pCilg ± CE

Down gradient 9.70 ± 1 .61 20. 8 ± 2.8 K-40 23 .07 ± 0.64from building Cs-137 0.145± 0.018

4133 U-238 1 ."_9 ± 0 .99Ra-226 0.691 ± 0 .050Th-232 0.990 ± 0 .106Th-228 0.944 ± 0 .086Ra-228 0.990 ± 0 .106U-235 N.D .

N.D. 4 Non Detect .

Summary/Conclusio nAfter reviewing Boeing survey data . ORISE survey results and associated data . and the results of thissurvey, it is determined that there are no elevatedareas of radioactive inside or outside the perimete r

fence of the site, no surface contamination of the structures within the site boundary and no soi l

residual contamination. The site known as Building 4133 is suitable for release for unrestricted use .contamination down gradient of the site . A dose assessment of the site was not done as there is no ne t

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('onlirmator; Sur\c\ of SSFI . .~RL\ LV Building 4!

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Soil Sample Location

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3000 - 3500 cpm

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3000 - 3500 cpm

1000 - 2500 cpm

Parts Spray Roo m

1000 - 2500 cp m

OOu~Co

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pit

3000 3500 cpm

Crane

3000 - 3500 cp m

3000 - 3500 cpm

concretepad

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3000 - 35p0cpm

nuance - -'IMai n e

3000 - 3500 cpm

Asphault Are a

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3000 - 3500 cpm3000 - 3500 cpm

3000 - 4000 Dirt areacpm

Soil Sample location

Building 4133Gamma Scan wi 1x1 Nal

3000 - 4000cpm

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('onlirmator; Sur\c\ of SSFI . .~RL \ LV Building 4I ; ;

Model 18 w/ pancake G-M : 40-80 cpmModel 2224 w/ 43-89 : a o cpm & (3 250-350 cp mMoedl 19 :8 pR/h

Building 413 3

Control Room

00

00

Interior Surface Scan Measurement sModel 3 : 1500 - 2500 cpm

('onlirmator; Sur\c\ of SSFI . .~RL \ LV Building 4I ; ;

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Interior Surface scan Measurement sModel 3 : 1500 2500 cp mModel 18 w/ pancake G-M : 40-80 cpmModel 2224 w/ 43-89 : Cl o cpm & (3 250-350 cp mMoedl 19: 8 pR/h

tsuilarng 413 3Parts Spray Room / Burn Room

('c,uliriuatury Sui e y o1 SSFL. :\I _\ LV Luildiug 4 1

Interior Surface Scan MeasurementsModel 3 w! Nal 1x1 : 2000 cp mModel 18 w/ pancake G-M : 40-80 cpmModel 2224 w/ 43-89 : a 0 cpm & R 250-350 cp mModel 19`x8 liRlh

Scrubber Effluent Catch Tank

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References

and associated Tennelec analysis results for various portions of the 4133 building site area andand miscellaneous radiation survey reports (form 732A) ~-vith maps detailing survey locationsBoeing . received 1999 . "Preliminary Draft Procedure for Building 4133"" . (R21 -RF)RS-0001 1

structures supplied by Boeing at the time of the survey .

~ . Boeing. 2004. "Building 4133 Radiation Survey Report ." (RS-00015 )

3 . ORISE" 2000. "Verification Survey of Building 4133 . Santa Susanna Field Laboratory th e

Boeing Company . Ventura County . California ."

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