Containers , secondary container

Secondary Containment Secondary containment refers to protection of environments outside the immediate laboratory. This requires both proper procedures and facihty design. 

Secondary containment Secondary containment systems include tank, dikes, curbing around process equipment, drainage collection systems, the outer wall of double walled tanks, etc. — API (see Loss of containment). 

Boric acid solution is stored in a cylindrical stainless steel tank to the exterior of the Nuclear Island. This tank provides primary containment. Secondary containment is provided, as a minimum, by the underlying eonerete base and drainage to external areas waste water system. During site-speeilie detailed design, the requirement for a bund to contain this tank will be finalised. Further details of primary and secondary containment are provided in Table 2.9.6 of the Envirorunent Report. 

Desipramine [50-47-5] (35) and nortriptyline [72-69-5] (36) are demethylated derivatives and principal metaboHtes of (32) and (33), respectively. Both compounds possess less sedative and stronger psychomotor effects than the tertiary amine counterparts, probably because tricycHcs containing secondary amine groups generally show greater selectivity for inhibiting the reuptake of norepinephrine compared with the reuptake of serotonin. Protriptyline [438-60-8] (37), a stmctural isomer of nortriptyline, is another important secondary amine that displays a similar clinical profile. 

Diked or Unitized Secondary Containment. Small tanks can have a secondary-containment dam built integrally into the tank. This is essentially within a steel box. These tanks may be either vertically or horizontally oriented in both cylindrical and rectangular shapes. The secondary-containment dikes may be open or closed. Closing the dikes makes access to the primary-containment tank more difficult, but keeps out rainwater. 

Vaulted. Vaulted tanks are installed inside a concrete vault. The vault, itself a Hquid-tight compartment, reduces the fire protection requirements as the NFPA and the International Fire Code Institute (IFCI) recognize these tanks as fire-resistant aboveground storage tanks. The vault provides a two-hour fire wall, thermal protection that minimizes tank breathing losses and pollution, secondary containment, and baUistic protection. 

The Sierra product line contains secondary and minor elements. Sierrablen products, ie, blends of Osmocote with uncoated nutrients for quicker... 

For normally buried tanks, tanks with measures against buoyancy and tanks with a secondary containment, no difficulties are to be expected for protection current densities below 200 fJ.A m. On the other hand, the protective action can... 

Secondary containment systems are best described as passive protective systems. They do not eliminate or prevent a spill or leak, but they can significantly moderate the impact without the need for any active device. Also, containment systems can be defeated by manual or active design features. For example, a dike may have a drain valve to remove rain water, and the valve could be left open. A door in a containment building could be left open. 

Green zone A compartment of secondary containment used in the atomic energy industry. 

It has been found " that those derivatives of 3-aminopropan-l-ol react most readily which contain secondary amino and hydroxyl groups as in the original formation of (1). The reaction can be catalyzed by alkaline reagents, e.g., small amounts of potassium hydroxide. 

Geomembrane These liners chiefly provide impermeable barriers. They can be characterized as (1) solid waste containment hazardous landfill, landfill capping, and sanitary landfill (2) liquid containment canal, chemical/brine pond, earthen dam, fish farm, river/coastal bank, waste-water, and recreation (3) mining, leach pad and tailing ponds and (4) specialties floating reservoir caps, secondary containment, tunnel, erosion, vapor barrier, and water purification. Plastics used include medium to very low density PE, PVC, and chlorosulfonated PE (CSPE). (The Romans used in their land and road constructions what we call geomembrane.)... 

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