Emergency Control Station

A continuous gas detection system must be provided to detect the presence of hazardous (toxic or highly toxic) gases at or below the permissible exposure limit (PEL) orthe ceiling limit (see UFC 8003.3.1.6). The detection system must initiate a local audible and visual alarm as well as transmit a signal to a constantly attended plant Emergency Control Station (ECS). Activation of the alarm/monitoring system must automatically close the shutoff valve on highly toxic or toxic gas supply lines. 

The recirculating air stream is considered an integral portion of the life safety system therefore, in a hazardous occupancy cleanroom (such as a semiconductor wafer fab), the system should not be automatically shut down by the smoke detection system. In lieu of automatic shutdown, a manually operated remote switch is to be provided at an approved location outside the fabrication area (UBC 1202.2.5). Since such a detection could happen at any time, our recommendation for the location of the switch is in a continually occupied but relatively secure spot, such as the nearest Emergency Control Station (ECS). UBC 1202.2.5 also dictates that the return air system of one hazardous cleanroom area shall not be connected to another eleamoom oeeupancy. 

All emergency shutoff control stations should be mounted in some type of break-glass enclosure with the locations coordinated with the local fire chief They could be located at the emergency control station, if approved by the "authority having jurisdiction."... 

Deflnition. Emergency Control Station (ECS) is an approved location on the premises of Group H, Division 6 occupancies where signals from emergency equipment are received (UBC 206-E). 

Ventilation systems must comply with the Mechanical Code except that the automatic shutoffs need not be installed on air-moving equipment. However, smoke detectors shall be installed in the circulating airstream of the cleanroom and shall initiate a signal at the emergency control station. (UBC 307.11.2.4). 

This section includes guidelines for the central control station equipment, emergency alarm stations, supervisory devices, and visual and audible alarm services. These systems can be used for all types of in-house emergencies, such as fires, explosions, vapor releases, liquid spills, and injuries. 

In plants having a central plant-wide fire and emergency alarm center (fire house or guard control station), consideration should be given to sending the... 

Special tools, materials, or chemicals Additional hazards not present during normal operations Location and use of emergency equipment Location of alternate control stations or panels Location of manual stops and shutoffs for systems normally under automatic control... 

During the silent hours, when senior management are not on site, the CCR staff will notify appropriate senior staff of the accident and prepare the Emergency Control Room (ECR) for their use on arrival at the station. 

The ECR is normally located away from the reactor buildings, but is in communication with all the station emergency control centres and emergency teams by direct telephone or radio. Specialist advice is available on reactor and plant conditions, plant damage repair procedures, chemistry and health physics control. 

The existing emergency response plans require technical support centre (Emergency Control Centre) to be established with expertise technically qualified locally available at the station. No special on-line display is provided. 

Snuffing steam, which is used to suppress a fire in the header box in the convection or radiant sections, is supplied through local and remote manifolds. The remote manifold shoulintermediate pipe support column. If the local area is unreadi-able in an emergency, steam would be supplied from the remote manifold. The inlet and outlet control stations are located along the pipe rack adjacent to die furnace. This particular fiimat uses manually controlled valves for each burner. The burner supply headers—fuel gas, fire steam, and fuel oil—are run... 

The on-site provision of a Main Control Room and an Operational Support Centre is consistent with current UK practice in which the Central Control Room is the location of the first control centre to be set up in an emergency. Each UK nuclear power station has a purpose built on-site Emergency Control Centre from which an emergency is managed. 

PFBR is to be operated as a base load station. It has a main control room and an emergency control room as well as local control stations. Distributed control sterns using microprocessors are used. Safety-related systems are provided with redundant, diversity, online testability and maintainability. 

Emergency lighting qualified to credible environments and events, and is available for at least 72 hours, shall be provided for these routes, as well as for the safe shutdown monitoring and control stations. The battery supply for these lights shall be qualified for at least 8 hours at the lowest allowable voltage level. 

Communications between safe shutdown monitoring and control stations and appropriate emergency stations shall be available and capable of performing their intended functions during and after credible environments and events, including loss of offsite power. The... 

Alarms should be initialed by the local or main control facility for the location. Manual activation means should be provided for all emergency, fire, and toxic vapor alarm signals. Activation of fire suppression systems by automatic means should also indicate a facility alarm. Most fire and gas detection systems are also set to automatically activate alarms after confirmation and set points have been reached. Manual activation of field or plant alarm stations should activate the process or facility alarms. 

Emergency alarm systems should always have a manual means for initiating alarms. Manual alarm stations are normally located on the periphery of the processing or storage areas near an expected path of exit travel or at control rooms. The alarm boxes should not be located in areas that are electrically clas-... 

Isolation or emergency shutdown (ESD) valves should be installed to stop fuel flow and the process feed flow into the heater in the event of heater tube rupture. These valves can be automatically actuated by controls or safety interlocks or can be manually operated remotely. Remote actuation can be from a control room console or in the field field actuation stations should be located at least 50 ft (15 m) from the heater. It is also common to provide a manual block valve, located at least 50 ft (15 m) from the heater, on each of the fuel and process feed lines. These should be accessible to operators in the event of an incident involving the heater. 

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