K-Reactor PSA

Interspersed among the principal lattice positions are 162 secondary positions for 66 safe Is, instrument rods, tie bolts connecting the water plenum to the top shield, and special components. The safety rods use a winch-cable system that releases when the clutch is deenergized to drop the safeu rods into the core. 

The vessel is a 15 ft high cylinder with a diameter of 16.25 ft constructed of half-in thick, type 304 stainless steel plate. Six outlet nozzles are uniformly spaced around the circumterence at the bottom, and six tapered inlet nozzles are uniformly spaced around the circumference of the water plenum at the top of the vessel. The primary water system PWS contains 40,000 gal of DjO 24,000 gal in the re tank and 16,000 gal in the piping system. Each of the six primary loi ted 

It is important to note safety differences between the SRS reactors and LWRs. Since the SRS reactors are not for power production they operate at a maximum temperature of 90° C and about 200 psi pressure. Thus, there are no concerns with steam blowdown, turbine trip, or other scenarios related to the high temperature and pressure aspects of an LWR. On the of nd, uranium-aluminum alloy fuel clad with aluminum for the SRS reactors melts at a m ver 

Because of these major differences, an LWRs PR A cannot be adapted to make an SRS PRA which must be made from basics. All phases of the analysis are as unique to SRS. 

The SRS Level 1 PRA is divided into eiaht nrincipal task areas (Table 11.3-4). The t yze progression of an accident for the 

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