Height protection systems

The core consists of 151 hexagonal fuel assemblies (FAs) (size across flats is 234 mm) with fuel elements and fuel lattice parameters analogous to those in VVER-1000. Each FA contains boron carbide rods which are combined in a cluster to form a control device. The control devices of 135 FAs are connected to drives of the electromechanical control and protection system (CPS). The core height is 3.53m, its equivalent diameter is 3.05m at average power density of 69.4 kW/1. 

This Fall Protection Plan addresses the use of conventional fall protection at a number of areas on the project, as well as identifies specific activities that require non-conventional means of fall protection. During the construction of residential buildings under 48 feet in height, it is sometimes infeasible or it creates a greater hazard to use conventional fall protection systems at specific areas or for specific tasks. The areas or tasks may include, but are not limited to ... 

The two most-used standards are the ANSI/ASSE Z359 2007 Fall Protection Code and the ANSI/ ASSE A 10.32-2004 Fall Protection Systems -American National Standard for Construction and Demolition Operations. It should be noted that the over 600-page ANSI/ASSE Z359 2007 Fall Protection Code is a more up-to-date standard and much more comprehensive than the 35-page ANSI/ ASSE A 10.32-2004 construction standard, however both are used to manufacture fall arrest equipment for people who work at height. 

Containment systems should be designed to contain a volume equal to the largest probable rapid process spill, release, or leak. Curb height should be calculated based on the depth of this maximum probable spill over the containment area plus a minimum freeboard allowance of 2 in (5 cm) the minimum recommended curb height is 4 in (10 cm). The containment volume should include an allowance for a probable quantity of firefighting water, assumed to be 10-20 minutes minimum. After this period, local containment will not be effective and an alternative means of protection should be provided. 

Use of manual fire monitors or area coverage water spray or deluge systems are typically sufficient for the fire protection of heat exchangers. However, where exchanger support saddles exceed 12 in (30 cm) in height, the supports should be protected by either water spray at a density of 0.3 gpm/ft (12 Ipm/m ) or application of fire resistive material. 

NFPA 13R, Standard for the Installation of Sprinkler Systems in Residential Occupancies up to and Including Four Stories in Height, National Fire Protection Association, Quincy, MA. 

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