Shields and barriers

Either avoid pipe runs along routes subject to possible mechanical damage, e.g. from fork-lift trucks or tankers, or provide shields and barriers. 

Shields and barriers damping, sound and heat absorbing materials... 

A tabulation of the structures, shields, and barriers for hazard protection will be developed later as the design develops. 

Your company is required to have a written PPE program if your employees use PPE in conjunction with their duties. Of course PPE is only to be used when engineering controls and administrative controls cannot be used to protect the employee. Under 1910.132, PPE refers to equipment to protect eyes, face, head, and extremities protective clothing respiratory devices and protective shields and barriers. If employees provide their own protective equipment, the employer is also responsible for it. The employer responsibilities include... 

This subpart provides the general requirements for the minimum personal protective equipment to be used by the employees in the performance of their tasks for protection against recognized workplace hazards. The section specifically states "Protective equipment including personal protective equipment for eyes, face, head, and extremities protective clothing respiratory devices and protective shields and barriers shall be provided, used, and maintained in a sanitary and reliable condition... 

There are a variety of control techniques, documented in the literature, to reduce overall worker exposure to noise. Such controls reduce the amount of sound energy released by the noise source, divert the flow of sound energy away from the receiver, or protect the receiver from the sound energy reaching him or her. For example, types of noise controls include proper maintenance of equipment, revised operating procedures, equipment replacements, acoustic shields and barriers, equipment redesign, enclosures, administrative controls, and personal protective equipment. 

For example, types of noise controls include proper maintenance of equipment, revised operating procedures, equipment replacements, acoustical shields and barriers, equipment redesign, enclosures, administrative controls, and personal protective equipment. 

On an industrial scale, operations are commonly carried out by remote control (Ref 10) and the considerations of quantity-distance (Ref 48) and barrier design (Refs 13 75) apply. On a lab scale, remote weighing, mixing and pressing are usually not practical, and the protection of personnel must take the form of shielding for eyes, face and hands, as well as thru protection for the hair and the choice of suitable clothing. 

In a recent development, an electronic packaging system was introduced to provide electrostatic shielding and moisture barrier desiccating package with air cushioning. 

In engineering,pflsvzvc controls are those that maintain safety by their presence— basically, the system fails into a safe state or simple interlocks are used to limit the interactions among system components to safe ones. Some examples of passive controls that maintain safety by their presence are shields or barriers such as containment vessels, safety harnesses, hardhats, passive restraint systems in vehicles, and fences. Passive controls may also rely on physical principles, such as gravity, to fail into a safe state. An example is an old railway semaphore that used weights... 

The ONCA structural equipment consists of an upper structural frame, gamma shielding, neutron shielding, thermal barrier, upper and lower guide tubes, and various seals. This equipment, which is illustrated in Figure 4.3-1, performs the mechanical functions for the (NCSS). The following paragraphs provide additional information about the various items. 

The gamma shield provides structural attachments for the fixed guide tubes, the neutron shielding, and the thermal barrier. 

Neutron Shield and Thermal Barrier The neutron shield consists of a cylindrical stainless steel container filled with boronated graphite material which is positioned beneath the gamma shield. The container is approximately 356 mm (14 in.) in length and is intended to restrict activation of components in the upper portion of the ONCA. 

Nine inches of thermal barrier is positioned between the gamma shielding and the neutron shielding and another 279 mm (11 in.) of thermal barrier is positioned near the lower end of the fixed guide tubes. The thermal barrier within the ONCA combines with additional thermal barrier and cooling coils provided by the Reactor Plant Cooling Water Subsystem outside the penetration to maintain the temperature of the upper portion of the ONCA within acceptable limits. 

The INCA structural equipment consists of an upper structural frame, gamma shielding, neutron shielding, thermal barrier, upper and lower guide tubes,... 

Neutron Shield. Thermal Barrier, and Guide Tubes The only differences in... 

Separate the energy being released from a structure or person who can suffer loss by interposing a barrier. Safety glasses, barrier guards, radiation filters or shields, median barriers on roadways, thermal insulation, and explosive barricades are examples of barriers. 

Shields, conduit and barriers need protection when distribution lines pass through or are in the people zone. For example, covers protect power lines extending from atop a pole to below ground. Locked gates and fences keep people, animals, vehicles, and other items out of power distribution substations. 

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