U.S. Reactor Containment Technology: a Compilation of Current Practice in Analysis, Design, Construction, Test, and Operation, Volume 1 Page: 1-35
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ORNL D .g. 62,-19'/7'R
MAIN STEAM LINE
MAKEUP WATER LINE
PUMP PRIMARY SYSTEM CONDITIONS
Fig. 1.5. Boiling-Water Reactor.
These systems operate at somewhat lower pressures than the pressurized-
water systems. Coolant or steam pressures are usually in the range of
600 to 1000 psi, although some higher pressures are reported. So far,
over 25 boiling-water reactors have been built or are now being constructed.
Except for the fact that large steam-generating heat exchangers are
not used for a boiling-water reactor, the other items of equipment are
quite similar to those of the pressurized-water systems. There may be,
however, steam entrainment separators, which are usually located inside
the reactor vessel. The steam is dried so that its quality is satisfac-
tory for turbine operation. Some boiling-water reactors have means for
superheating the steam, employing either nonnuclear heat or steam-cooled
fuel elements around the periphery or in the center of a boiling core.
While a postulated accident for a plant with nuclear superheat is more
complex than that for a conventional boiling-water system, adequate de-
sign can ensure that there is no compromise in the safety of the system.
Present-day boiling-water reactor plants usually locate the steam
turbine outside the containment system, even though the location of any
portion of the primary system outside the containment system requires
special considerations in plant containment design. Both the pressure-
suppression and high-pressure containment systems have been employed
with such an arrangement, although other systems, such as a low-pressure
system or a pressure-relief system, could conceivably be adopted.
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Cottrell, William B. & Savolainen, A. W. U.S. Reactor Containment Technology: a Compilation of Current Practice in Analysis, Design, Construction, Test, and Operation, Volume 1, report, August 1965; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc101033/m1/63/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.