Decontamination Facility Research Articles

Hazardous and Toxic Material Decontamination Facility Training in Virtual Reality

Patient decontamination is the act of removing or neutralising hazardous substances from an affected individual. To ensure adequate emergency preparedness, regulations require hospitals to train personnel in decontamination procedures regularly. To supplement in-person training, a virtual reality (VR) system is being developed for the training of hospital staff members in the mass decontamination of hazardous and toxic materials (HAZMAT) and/or radioactively contaminated casualties. As a demonstration of the concept, a primary VR prototype is designed to help users familiarize themselves with a chemical scanner tool, intended for examining victims for residual chemical hazards. This initial prototype showcases the benefits of using VR to create training simulations, complementing existing decontamination training methods in a secure and cost-effective manner. The proposed approach features a modularized user-centric design, a novel scanning simulation, and a high-realism virtual environment and workflow to enhance training effectiveness. A pilot user study and assessment suggest that new users were able to achieve a significant level of competency with VR, compared to users who underwent traditional training.

Evaluation of CBRN Preparedness of German Hospitals with Higher Level of Care: A Cross- Sectional Survey.

Chemical, biological, radiological, and nuclear (CBRN) events with multiple casualties are rare events, but preparedness is crucial for hospitals to respond properly. This study evaluated the preparedness and disaster planning of German hospitals for CBRN incidents. In a cross-sectional study, German hospitals with level III (highest level) emergency departments were surveyed using an online questionnaire focusing on risk assessment, infrastructure, hospital disaster planning, and preparedness for CBRN events. Between June and July 2023, 50 hospitals were surveyed. 62.5% of the hospitals had a section on chemical incidents in their disaster plan. A decontamination facility was available in 29.8% of the hospitals and chemical protective suits in 46.8%. The minority of the hospitals trained the correct handling of personal protective equipment (PPE) (39.1%) regularly or had frequent CBRN drills (21.3%). Most hospitals had the infrastructure for medical isolation (93.6%). The level of CBRN preparedness is heterogeneous for German hospitals. Most were well prepared for infectious patients, but only half of all hospitals had sufficient PPE for chemical incidents and only 30% had a decontamination facility available. Overall, the level of CBRN preparedness is still insufficient and needs further improvement.

Towards Decontamination Facility Training in VR

This paper presents the ongoing development of a Proof-of-Concept Virtual Reality (VR) system for staff training for Tan Tock Seng Hospital mass decontamination of Hazardous and Toxic Materials (HAZMAT) and/or radioactively contaminated casualties. As a Proof-of-Concept, the initial prototype focuses on allowing users to practice using a chemical scanner device that would be used to scan casualties for leftover chemical hazards. The preliminary development demonstrates the advantages of utilizing VR for supplementing current decontamination training in a safe and economical way.

An extendable optical fibre probe survey meter for naturally occurring radioactive material (NORM) and other weak emitters

We have developed a radioluminescence-based survey meter for use in industries in which there is involvement in naturally occurring radioactive material (NORM), also in support of those needing to detect other weak emitters of radiation. The functionality of the system confronts particular shortcomings of the handheld survey meters that are currently being made use of. The device couples a LYSO:Ce scintillator with a photodetector via a polymer optical fibre waveguide, allowing for "intrinsically safe" inspection within pipework, separators, valves and other such component pieces. The small-diameter optical fibre probe is electrically passive, immune to electromagnetic interference, and chemically inert. The readout circuit is entirely incorporated within a handheld casing housing a silicon photomultiplier (SiPM) detection circuit and a microprocessor circuit connected to an LCD display. A 15 m long flexible PMMA optical fibre waveguide is butt coupled to an ABS plastic probe that retains the LYSO:Ce scintillator. Initial tests have included the use of lab-based mixed gamma-ray sources, measurements being made in concert with a reference conventional GM survey-meter. Characterization, via NORM sources at a decontamination facility, has shown useful sensitivity, covering the dose-rate range 0.10- to 28 µSv h−1 (R-squared 0.966), extending to 80 µSv/h as demonstrated in use of a Cs-137 source. The system is shown to provide an effective tool for detection of radioactivity within hard to access locations, in particular for sources emitting at low radiation levels, down to values that approach background.

The Utilization of Hospital-Based Decontamination Facility for Chemical Incidents

Introduction:The constraints of performing prehospital decontamination in mass casualty incidents involving the release of chemical agents at disaster sites in modern cities are notable. Compounding this are highly built-up urban areas with significantly high population density and traffic congestion. This places the burden of performing such decontamination on nearby healthcare facilities. Based on this need, public hospitals in Singapore have been equipped with decontamination facilities. We present a review of the utilization of this facility at our institution.Method:A retrospective review of the utilization of the hospital decontamination station (HDS) was carried out, noting its frequency, purpose, and outcomes.Results:Since its construction, the HDS has been deployed successfully many times a year for both routine training and disaster preparedness exercises. Despite the lockdown measures due to Covid-19, with concomitant reduction in social and economic activity, the HDS was activated five times for decontamination of chemical contaminated casualties. It is fortunate that, although HDS training activities were curtailed during this period, emergency department (ED) staff were still able to function effectively using prior experience, donning chemical protective suits, and performing decontamination. The semi-automated HDS facilitated rapid deployment which contributed to ease of use of this resource for timely decontamination of casualties with good outcomes.Conclusion:Chemical incidents resulting in contaminated casualties are uncommon events. Nonetheless hospitals must be prepared to deal with this situation in a timely manner. The rapidly deployable HDS has become an important resource and an operationally ready solution for dealing with chemical contaminated casualties presenting at short notice to the ED. Regular training and deployment exercises utilizing the HDS provide staff familiarity critical to overall readiness for chemical incidents. This strategy provides a reliable countermeasure in an all-hazards approach to disaster preparedness at the hospital.

Large-scale decontamination of disposable FFP2 and FFP3 respirators by hydrogen peroxide vapour, Finland, April to June 2020.

BackgroundThe shortage of FFP2 and FFP3 respirators posed a serious threat to the operation of the healthcare system at the onset of the COVID-19 pandemic.AimOur aim was to develop and validate a large-scale facility that uses hydrogen peroxide vapour for the decontamination of used respirators.MethodsA multidisciplinary and multisectoral ad hoc group of experts representing various organisations was assembled to implement the collection and transport of used FFP2 and FFP3 respirators from hospitals covering 86% of the Finnish population. A large-scale decontamination facility using hydrogen peroxide vapour was designed and constructed. Microbiological tests were used to confirm efficacy of hydrogen peroxide vapour decontamination together with a test to assess the effect of decontamination on the filtering efficacy and fit of respirators. Bacterial and fungal growth in stored respirators was determined by standard methods.ResultsLarge-scale hydrogen peroxide vapour decontamination of a range of FFP2 and FFP3 respirator models effectively reduced the recovery of biological indicators: Geobacillus stearothermophilus and Bacillus atrophaeus spores, as well as model virus bacteriophage MS2. The filtering efficacy and facial fit after hydrogen peroxide vapour decontamination were not affected by the process. Microbial growth in the hydrogen peroxide vapour-treated respirators indicated appropriate microbial cleanliness.ConclusionsLarge-scale hydrogen peroxide vapour decontamination was validated. After effective decontamination, no significant changes in the key properties of the respirators were detected. European Union regulations should incorporate a facilitated pathway to allow reuse of appropriately decontaminated respirators in a severe pandemic when unused respirators are not available.

A Novel Hospital-Based Mass Casualty Decontamination Facility for Hazardous Material Disasters

A Novel Hospital-Based Mass Casualty Decontamination Facility for Hazardous Material Disasters

Dismantling and decontamination of large-sized radiation-contaminated equipment during Research Building B decommissioning at the Bochvar Institute site

The article presents the results of work on dismantling the large installation equipment of Research Building B at the Bochvar High-technology Research Institute of Inorganic Materials (Bochvar Institute). The works were carried out as part of Building B preparation for decommissioning. The purpose of dismantling the large-sized capacitive equipment was to reconstruct the large installation site for managing radioactive waste generated during Building B decommissioning. The works on decommissioning a radioactively contaminated building within a densely populated district of megalopolis were carried out for the first time. The characteristics of the large-sized capacitive equipment are presented. Radioactive contamination of the capacitive equipment is determined by long-lived a-emitting isotopes: 235U, 238U, 239Pu. The sequence of works on dismantling the radiation-contaminated capacitive equipment includes preparatory work, dismantling the tank piping, localizing radioactive contamination of the external surface of the equipment as well as dismantling and moving it into a transport container. Dismantling and decontamination of the large-sized capacitive equipment was carried out by the Bochvar Institute Decommissioning Department. The following tools were used during the works: (1) a mobile foam decontamination facility to perform decontamination works and (2) a mobile high pressure facility to apply localizing and decontaminating film coatings. The tanks were dismantled by means of low-spark tools, i.e., reciprocating saws. Crane runways were made in order to move the dismantled equipment into transport containers: the movement was carried out with the help of a winch. The main results of dismantling and decontaminating the radioactively contaminated tanks are the dismantling of four units of long-length column-type equipment with heights from 4.2 to 6.4 m and 26 units of capacitive equipment (maximum capacity = 8 m3) as well as decontamination of the internal surfaces of radiation-contaminated equipment (decontamination factor = 25–70). As a result, the activity of the accumulated radioactive waste was reduced (the RW class was changed from 3 to 4). The main conclusion regarding the managment of large-sized radiation-contaminated tanks during Building B decommissioning is as follows: the works were organized and carried out at a high technical level, using modern decontamination and dismantling equipment and modern methods to ensure work safety at the Bochvar Institute site in the city of Moscow.

Characterization of NORM solid waste produced from the petroleum industry

The accumulation of scales in the production pipe lines is a common problem in the oil industry, reducing fluid flow and leading to costly remediation and disposal programmes. Thus, an accurate determination of the activity of the radionuclides in scale samples is essential for environmental protection. The present study focuses on the characterization of naturally occurring radioactive materials (NORM) in scales generated from the petroleum industry to develop a suitable NORM waste management plan. The activity concentrations of 226Ra, 228Ra and 210Pb in 32 representative samples, collected from a number of drums at the NORM Decontamination Facility storage, were determined using gamma spectrometry. It was found that the highest concentrations were 2922, 254 and 1794 Bq g−1 for 226Ra, 228Ra and 210Pb, respectively. A comparison to the reported worldwide values was made. Statistical approaches, namely Box plot, ANOVA and principal components analysis were applied on the total results. Maximal correlation was demonstrated by 226Ra activity concentration and count per second (cps) to density ratio. To obtain an accurate characterization of the radionuclides studied in the scale samples, method validation of gamma measurement procedure was carried out, in which minimum detectable activity, repeatability, intermediate precision and assessment of uncertainty were the parameters investigated. The work is a forefront for the proper and safe disposal of such radioactive wastes.

Deliberate chemical attack: revisiting the lessons of the Tokyo subway attack

Deliberate chemical attack: revisiting the lessons of the Tokyo subway attack

Measurement and Analysis of 8-Hour Time-Weighted Average Sound Pressure Levels in a Vivarium Decontamination Facility

ABSTRACT Occupational noise exposure is a recognized hazard for employees working near equipment and processes that generate high levels of sound pressure. High sound pressure levels have the potential to result in temporary or permanent alteration in hearing perception. The cleaning of cages used to house laboratory research animals is a process that uses equipment capable of generating high sound pressure levels. The purpose of this research study was to assess occupational exposure to sound pressure levels for employees operating cage decontamination equipment. This study reveals the potential for overexposure to hazardous noise as defined by the Occupational Safety and Health Administration (OSHA) permissible exposure limit and consistent surpassing of the OSHA action level. These results emphasize the importance of evaluating equipment and room design when acquiring new cage decontamination equipment in order to minimize employee exposure to potentially hazardous noise pressure levels.

The Chinese nuclear tests, 1964–1996

A combination of intellectual rigor, technical sophistication, hard work, and intelligence gathering brought China into the world’s nuclear club in record-shattering time.

Author of Hine Report would opt for this endoscope decontamination facility!

′Yes′, Dame Deirdre Hine said when opening the new �500 000 Endoscope Decontamination Unit at one of Northern Ireland′s major hospitals, Altnagelvin, last year, ′If I needed to have an endoscopy, I would like to have it at Altnagelvi′.

One urban hospital’s experience with false anthrax exposure disaster response

Between October 30 and November 12, 1998, several anthrax threats involving potential patient exposure were reported in the greater Indianapolis area. Of these events, 3 involved patient decontamination in the field, transport to a hospital, and a repeat decontamination at the hospital. A fourth event was called off after our hospital decontamination facility had been set up.

5511263 Laundering liquids process and decontamination facility

Decontamination laundering facilities and methods are disclosed including a washer area, a filtering area automatically monitoring and controlling cleaning fluid quality discharged to the environment, a clean area, and apparatus and methods for automatically timing waste water sampling. Automatic timing includes controlling and actuating the date and time of day for taking a sample and the duration of the timing cycle, and relay means for closing and opening circuits connected electrically to timer contacts for energizing components of the waste water sampling. In one aspect, a tri-way valve passes a portion of waste water into a discharge pipe at all times and an electronic level control monitors and fills a waste water sampling container to a predetermined level. Contaminants include asbestos, and/or lead, silica dust, titanium dioxide dust, or carbon dust. Contaminated materials include woven and non-woven fabric, permeable and impermeable clothing.

5421048 Laundering decontamination facility and method: Reinert Gary L Allison Park, PA, 15101, United States

5421048 Laundering decontamination facility and method: Reinert Gary L Allison Park, PA, 15101, United States

5421048 Laundering decontamination facility and method: Reinert Gary L Allison Park, PA, 15101, United States

5421048 Laundering decontamination facility and method: Reinert Gary L Allison Park, PA, 15101, United States

A Description of the Demonstration Integral Fast Reactor Fuel Cycle Facility

A fuel examination facility at the Idaho National Engineering Laboratory is being converted into a facility that will electrochemically process spent fuel. This is an important step in the demonstration of the Integral Fast Reactor concept being developed by Argonne National Laboratory. Renovations are designed to bring the facility up to current health and safety and environmental standards and to support its new mission. Improvements include the addition of high-reliability earthquake hardened off-gas and electrical power systems, the upgrading of radiological instrumentation, and the incorporation of advances in contamination control. A major task is the construction of a new equipment repair and decontamination facility in the basement of the building to support operations.

Electrolytic Decontamination of Stainless Steel Using a Basic Electrolyte

An electrolytic plutonium decontamination process or stainless steel was developed for use as the final step in a proposed radioactive waste handling and decontamination facility to be construced at the Rockwell International Rocky Flats plutonium handling facility. This paper discusses test plan, which was executed to compare the basic electrolyte with phosphoric acid and nitric acid electrolytes. 1 ref.

β-scintillation monitor for krypton-85 at high pressures

A CaF 2(Eu) scintillation detector has been designed for continuous inline monitoring of 85Kr in corrosive gas streams at pressures up to 600 psig and temperatures as low as −40°C. The detector is capable of rapid determination of 85Kr at concentrations as low as 0.001 ppb. A number of these detectors have been successfully tested as monitors in a decontamination facility where 85Kr and other noble gases are removed by high-pressure scrubbing with selective solvents.