U.S. Reactor Containment Technology: a Compilation of Current Practice in Analysis, Design, Construction, Test, and Operation, Volume 1 Page: 1-47
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Fig. 1.12. Pressure-Venting Containment Shown with a Gas-Cooled Reactor.
avoid developing an excessive pressure in the containment structure
(building). An additional recirculating fission-product-removal system
would not necessarily be required for all applications but would be a
function of the specific need of a specific reactor and site for con-
The applicability of confinement or vapor-venting containment is quite
dependent on the reactor type and, in turn, can be characterized by the
maximum credible accident. In general, confinement containment has been
used for reactor systems associated with relatively low-energy mca's.
Those systems in which the energy release is sufficiently small that con-
tinuous exhausting of the building atmosphere keeps the building pressure
below that of the atmosphere are known as negative-pressure systems. Ob-
viously the structures required for such a containment system are not sub-
jected to high-pressure loads and may be of steel frame construction with
metal-panel siding. Usually exterior windows are omitted, all joints are
caulked and sealed, and doors are gasketed. Such a building may be oper-
ated at a slightly negative pressure to produce inleakage and to channel
all discharge through the filtered stack exhaust system. This type of
containment is used for swimming pool reactors, the Oak Ridge Research
Reactor, and graphite reactors.
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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/m1/75/: accessed March 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.