DECONTAMINATION PROJECT "IN PROCESS"



Radiation Safety Associates, Inc. has had extensive experience in writing decommissioning plans, and performing radiological assessments and decontamination. Some of these projects are described below:

1. University of Connecticut Health Center, Farmington, Connecticut. Performed removal and decontamination of approximately 120 linear feet of ventilation duct contaminated with C-14. This work was performed in June of 1996.

2. Pratt & Whitney Manufacturing Building, Southington, Connecticut. Performed a full decommissioning survey of this 800,000 ft2 building and decontaminated areas of residual contamination to within f ree-release limits. Surveys included radioanalysis of wipe samples and direct measurements for residual radioactive materials. This work was performed between December 1995 and January 1996.

3. Pratt & Whitney Warehouse, Southington, Connecticut. Performed a full decommissioning survey of this 324,000 ft2 building and decontaminated areas of residual contamination to within free-release limits. Surveys included radioanalysis of wipe samples and direct measurements for residual radioactive materials. This work was performed between December 1995 and January 1996.

4. Mobil Technical Center, Princeton, New Jersey. Performed a complete radiological assessment and decontamination of a 134,000 ft2 research facility for the purpose of decommissioning. The contaminants identified at the facility were H-3, C-14, S-35 and P-32. This work was performed from November 1995 to January of 1996.

5. Pfizer Animal Health Center, West Chester, Pennsylvania. Performed a complete radiological assessment and decontamination of eight buildings and a leach field at this research facility for the purpose of decommissioning the site. The contaminants identified at the facility were H-3, C-14, S-35 and I-125. The project was performed from April to August of 1995.

6. Shieldalloy Metallurgical Corporation, Cambridge, Ohio. RSA, Inc. was contracted as a subcontractor by Integrated Environmental Management, Inc. (IEM). Provided health physics technician services on-site for several weeks in support of a drilling operation. The duties performed included counting air samples and calculating results, screening samples, and performing contamination surveys.

7. University of Connecticut Health Center, Farmington, Connecticut. Performed a radiological assessment and decontamination of a fume hood and associated duct work. These items were contaminated with C-14. This work was performed in February of 1995.

8. Mobil Technical Center, Princeton, New Jersey. Performed a radiological assessment and removal of four sub-floor piping runs contaminated with uranium. This work was performed in September of 1994.

9. Boston University Medical Center, Boston, Massachusetts. Performed a complete radiological assessment of this 10-story research building and decontaminated all areas found to be in excess of the free-release limits. The radioisotopes encountered were H-3, C-14, S-35, I-125 and P-32.

10. Pratt & Whitney, Middletown, Connecticut. Performed radiological assessment of Building 450, a two-story building with associated hot cells, storage vaults, pits, and sewers used in the 1950's and 60's by the Atomic Energy Commission (AEC) and the Army Corps of Engineers in the Connecticut Advanced Nuclear Engineering Laboratory (CANEL) project. The building, unused since the end of the project, was contaminated primarily with cobalt-60 and cesium-137. Pratt & Whitney wished to have this building released for unrestricted occupancy in order to turn it into a warehouse. RSA developed a decommissioning plan which was approved by NRC, and performed the decontamination. The project included soil and water sampling and analysis, septic tank liquid and sludge sampling, the removal and decontamination of more than mile of underground pipe, and packaging, shipment, and burial of all radioactive waste generated during this decontamination effort. This building and its environs were unconditionally released by NRC in January of 1993.

11. Pratt & Whitney Aircraft, 15 Buildings, Middletown, Connecticut. These buildings were used in conjunction with the Atomic Energy Commission research project described above and for machining of Thoriated-Nickel parts. RSA performed a complete radiological assessment on each of these structures, and the Nuclear Regulatory Commission has accepted the results of the survey findings. No significant radioactive materials were found during these surveys.

(Since all of the buildings on the P&W site were occupied during the times that the surveys were taking place, a significant potential existed for employee allegations to be made which would result in bad publicity for one of Connecticut's largest employers. Due, at least in part, to RSA's professionalism in carrying out these tasks, no stories of any kind appeared in any news medium.)

12. Allied Signal, Stratford, Connecticut. Performed a decommissioning survey of a building which had been used for the machining of Magnesium-Thorium parts.

13. Pratt & Whitney, Manchester, Connecticut. Performed a full decommissioning survey of this 55,000-ft2 building and decontaminated areas of residual contamination to within release limits. Surveys included radioanalysis of soils, building materials and ground water for natural uranium and thorium.

14. Pratt & Whitney Overhaul and Repair Building, Southington, Connecticut. Performed a full decommissioning survey of this 506,000-ft2 facility and decontaminated areas of residual contamination to within release limits. Surveys included radioanalysis of soils, building materials and ground water for natural uranium and thorium.

15. Yale University, Sloane Physics Laboratory, New Haven, Connecticut. RSA performed a radiological assessment of four fume hoods and their associated chimney flues in Yale's Sloane Physics Laboratory in the late summer of 1991. Based on this assessment, Yale decided that decontamination was required. The primary contaminant was radium-226. RSA removed all drains and piping from the hoods, removed hood liners, used abrasive decontamination methods on remaining sections and interiors of chimney flues, and packaged the waste for disposal.

16. Yale University, Juggs Laboratory, New Haven, Connecticut. Radioactive materials such as tritium and sodium had been used and stored in the Juggs Laboratory for several decades, and contamination had accumulated over the years. RSA removed approximately 12 four-foot- deep concrete storage cells, underground drainage pipes and their associated components, and performed spot decontamination on wall and floor areas. The final radiological assessment included soil sampling. This facility decommissioning work was completed in the late fall of 1990 and accepted by NRC.

17. 235 E. 44th Street, New York, New York. Performed radiological assessment of 2 story building which had been used in the 1940's and 50's as a radium processing facility. An assessment found substantial low-level contamination throughout the building as well as several "hot-spots" in drainage pipes and under certain floor areas. RSA obtained a radioactive materials license from the State of New York Department of Labor for the purpose of decontaminating the building. This extensive decontamination began in the winter of 1990 and was completed in the late summer of 1991. Decontamination activities included removal of drains and pipes, removal of contaminated floor and ceiling tiles, abrasive decontamination of large floor areas, spot decontamination of wall areas, and packaging and shipment of radioactive materials for disposal. The New York State Department of Labor performed their verification surveys, and the building was released for unrestricted use. The radioactive materials license, therefore, was terminated December 18, 1991 at our request.

18. Alexion Pharmaceuticals, New Haven, Connecticut. Surveyed laboratory areas, bench tops and fume hoods. Successfully decontaminated identified areas to meet free-release limits.

19. Corning Clinical Laboratories, New Britain, Connecticut. Performed decommissioning surveys in a laboratory where Iodine-125 had been used. Located and decontaminated various areas which were above the free-release limits.

20. Aircraft Components, Inc. Worked closely with NRC Region I in the survey and decontamination of this facility which had been used for the machining of Magnesium-Thorium parts. This facility had been abandoned by the licensee. Surveyed and decontaminated this building to within the free-release guidelines.

21. Exxon Research Center, 1900 E. Linden Avenue, Linden, New Jersey. Performed radiological assessment surveys and decontamination of a four-story laboratory building for the purpose of deactivating the facility and terminating the license. Primary contaminants were tritium and uranium. Decontamination involved cleaning of sinks, cabinets, and shelving. This work, performed in the spring of 1986, was accepted by the Nuclear Regulatory Commission (NRC), the building was released for unconditional occupancy, and the license was terminated. Due to the fact that this site is no longer in use by Exxon, no reference is available, but Region I of the Nuclear Regulatory Commission would have records of the satisfactory decommissioning.

22. Saint Gobain/Norton, 1 New Bond Street, Worcester, Massachusetts. Performed radiological assessment surveys and decontamination of a large industrial building used in manufactuing of urania and thoria refractories in the late 1950's and 60's. Decontaminated the interior of the building to within current free-release guidelines. This project included removal of contaminated clay sewer line exterior to the building and assessment and remediation of contaminated soil. The building has been released for unrestricted use by the Nuclear Regulatory Commission, and the environmental remediation is still ongoing.

23. Bank vault in Macon, Georgia. Removed an ingot of Radium-226 from a personal safety deposit box, decontaminated and surveyed the vault area, and performed dose calculations for various bank employees. Work was performed "after hours" to minimize public and staff exposure.

24. Zinc recycling mill, Atlanta, Georgia. Decontamination of a zinc recycling mill which had become extensively contaminated with depleted uranium. Facility decontaminated and released for further use by the mill.

References for any of these jobs are available on request. Please contact us for details.


Laboratory Capabilities and Analytical Equipment

Radioanalyses

RSA Laboratories is a full-service, licensed radioanalytical laboratory capable of performing virtually every type of radioanalysis in existence. In addition to the radioanalytic equipment described below, RSA Labs also maintains a complete wet-chemistry lab for performing the sometimes complex chemical separations often required prior to the radioanalysis. We can work with samples in any medium or geometry, including soil, sludge, water, drinking water, wipes, filters, and bulk samples.

Gamma Spectrum Analyzer
EG&G gamma spectroscopy system with high-efficiency (76%) N-type HPGe detector in a low-background shield with an ultra-low background cryostat.

Alpha Spectrometer
Oxford Oasis alpha spectroscopy system with eight ion-implanted silicon detectors.

Low-Background Gross Alpha/Beta Counter
Protean IPC 9025 low-background, gas proportional counter with guard detector and automated sample changer.

Liquid Scintillation Counter
Canberra Tri-Carb 2550 TR/LL liquid scintillation with low-background option, luminesence correction, and 360-sample capacity.

Instrument Calibration
We are capable of calibrating virtually all makes and models of hand-held radiation detectors. Exposure rate instruments are calibrated in our J.L. Shepard and Associates Model 6910 calibration range, which provides Cs-137 exposure rates from 0.02 to 5,000 mR/h. We maintain a very wide variety of NIST-traceable alpha-, beta-, and gamma-emitting sources as precision pulse generators for the calibration of count-rate instruments. A complete array of other standard and specialty electronic instrumentation is also maintained for the calibration and repair of instruments. Examples of these are oscilliscopes, high-impedance voltmeters, and infrared communicators.
We can also calibrate air samplers and flow meters.

Licenses and Certifications
RSA Laboratories is licensed by the NRC (License #06-30007-01) to perform sample analysis and instrument calibrations. We are also a Connecticut-approved Public Health Laboratory (#PH-0111), and certified to perform drinking-water analysis.

RSA/RSA Labs Portable Survey and Analytical Equipment

Multi-Channel Analyzers
1 Oxford Instruments Prospector, a portable, stand-alone quantitative 2" x 2" sodium iodide-based gamma spectrum analyzer. A 1/2" lead shield is available to be used with this device.
1 Oxford Instruments NanoSpec, a portable quantitative 2" x 2" sodium iodide-based gamma spectrum analysis. After taking spectra, data must be downloaded and analyzed on a computer

Gas-Proportional Detectors
2 Ludlum 43-68 100 cm2 gas-proportional detectors
2 Ludlum 44-110 100 cm2 windowless gas-proportional tritium friskers
1 Ludlum 43-38 400 cm2 gas-proportional detector (hand-held)
2 Ludlum 239-1F 400 cm2 gas-proportional floor monitors
1 Ludlum 43-98 gas-proportional pipe probe

Scintillation Detectors
1 Ludlum 44-10 2" x 2" sodium iodide gamma scintillator
1 Eberline SPA-1 2" x 2" sodium iodide gamma scintillator
2 ANS 2" x 2" sodium iodide gamma scintillators (for use with Oxford multi-channel analyzers)
1 Ludlum 44-62 1" x 1" sodium iodide gamma scintillator, waterproof up to 100'
1 Ludlum 44-17 20 cm2 low-energy sodium iodide gamma scintillator
2 Ludlum 44-3 5 cm2 low-energy sodium iodide gamma scintillators
2 Ludlum 43-1 75 cm2 zinc sulfide alpha scintillators
4 Ludlum 43-2 11.6 cm2 zinc sulfide alpha scintillators
1 Ludlum 43-5 50 cm2 zinc sulfide alpha scintillator
1 Ludlum 44-116 100 cm2 plastic beta scintillator

G-M Detectors
17 Ludlum 44-9 "pancake" G-M detectors
9 Ludlum 44-6 "hot dog" G-M detectors
2 Ludlum 44-40 shielded G-M detectors
1 Bicron PGM "pancake" G-M detector

Exposure Rate Instruments
1 Bicron Micro-Rem LE
4 Ludlum Model 19 micro-R meters
1 Ludlum Model 9 ion chamber
1 Bicron RSO-5 ion chamber
1 Victoreen 450P pressurized ion chamber
1 Ludlum Model 5 geiger counter

Portable Sample Counters
2 Ludlum Model 120 gas-proportional sample counter (gross alpha/beta)
1 Ludlum Model 43-10 alpha sample counter
2 Lead-shielded G-M sample counters

Hand-Held Survey Meters
2 Ludlum Model 2224 scaler/ratemeter for alpha/beta survey and discrimination
1 Ludlum Model 2224-1 scaler/ratemeter for alpha/beta survey, sample analysis, and discrimination
2 Ludlum Model 18 analyzers
2 Ludlum Model 12 rate meters
14 Ludlum Model 3 survey meters
1 Bicron Surveyor M

"Desktop" Counter/Scalers/Analyzers/Rate Meters
1 Ludlum Model 2200 counter/scaler/single-channel analyzer
1 Ludlum Model 1000 counter/scaler
2 Ludlum Model 177 alarm ratemeters
1 Bicron Frisk Tech counter/scaler
2 Johnson DIG-5 counter/scalers

Air Samplers
1 Gast low-volume air sampler
2 Staplex low-volume air samplers
1 SAIC medium-volume air sampler
2 Staplex high-volume air samplers
1 MSA oxygen and combustible gas detector
1 MSA volatile organic gas detector

Miscellaneous
2 Ludlum 180-1 constant-geometry sample holders (for use with 2" O.D. detectors)
2 Ludlum 180-1 constant-geometry sample holders (for use with 44-9 detectors)
1 Ludlum 180-4 constant-geometry sample holder (for use with any detector)
1 Ludlum 180-16 constant-geometry sample holder (for use with 43-1 detector)

Decontamination Equipment
5 Pentek "Corner Cutters" (HEPA-filtered, hand-held needle scabbler)
1 Pentek "Squirrel" (HEPA-filtered floor scabbler)
1 Desco "Mini-Flushplate" (HEPA-filtered, hand-held rotary scarifier)
1 5,000 cfm HEPA filter/blower unit
2 750 cfm HEPA filter/blower units
1 500 cfm HEPA filter/blower unit
1 160 cfm HEPA filter/blower unit
3 Pullman-Holt 55-gallon drum-mounted HEPA vacuum cleaners
1 Pullman-Holt 30-gallon HEPA vacuum cleaner
1 Hako Minuteman 30-gallon HEPA vacuum cleaner
2 Pullman-Holt back-pack HEPA vacuum cleaners
3 Black & Decker industrial (approx. 20 lb.) electric chipping hammers
1 Black & Decker industrial (approx. 70 lb.)"Pavement Breaker" electric jack hammer
3 2 hp, 9.1 scfm electric air compressors
3 Air-powered extended die-grinders
1 90 air-powered die-grinder
2 Milwaukee Super-Sawzalls
1 Milwaukee Sawzall
3 Milwaukee Porta-Band deep-cut portable band saws
1 Electric rotary drain cleaner with attachments
1 1400 watt, single-phase gasoline generator
1 36 kilowatt, three-phase diesel generator
1 gasoline-powered chop saw
2 oxy/acetylene cutting arrays
1 55-gallon drum hydraulic compactor
1 Sand-blast cabinet

* An assortment of miscellaneous specialty and hand tools

Radiation Safety Associates, Inc. also owns over 250 sets of protective clothing, as well as an extensive variety of state-of-the-art respiratory protection devices.


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