PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I Page: 45 of 161
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f. Piping and Valves
All system piping is to be built for a design pressure
of 2500 psi and a design temperature of 695F. Although an ASA-B31 code
design is preferred, certain exceptions to the code may be allowed in the
interest of economy. For example, centrifugal castings and multi-layer
pipe should be investigated.
All piping is to be arranged so that piping external to
the building can be drained to prevent freezing under any possible condition.
Piping should be insulated to accepted power plant standards and adequate
protection of outdoor piping, piping insulation, and supporting structure
must be provided for all weather conditions. Adequate venting of the piping
system is also to be provided. Particular attention must be given to the
condenser discharge piping and relief lines to prevent water-steam surging
The system must be flexible enough to permit rather
large temperature differences, since the experimental nature of the facility
requires that there be greater and more frequent temperature fluctuations
than would be found in a conventional, steadily operating process system or
power plant. Examples of possible adverse piping conditions will be sup-
plied to the Architect-Engineer by the Laboratory.
Reasonable care is to be given to the system during
construction to insure cleanliness of the piping interior. Coating of butt
welding joints with silicone grease to prevent burn-through will not be
permitted. All primary internals are to be sufficiently clean before oper-
ation to result in water resistivity values of not less than 500,000 ohm-cm
after sufficient time has elapsed to assure equilibrium in corrosion rates.
The various primary system valves are listed in
Table I, together with their type of duty, design flow, desired pressure drop,
and suggested type. This information is not to be considered firm, especially
insofar as valve quantities (when two or more are suggested for a single
duty) and sizes are concerned.
For Steps I and II the entire steam disposal system
from the connecting flanges at the emergency shut-down coolers to the
stack shall be fabricated from low alloy carbon steel. This will include
the safety and relief valve system. All carbon steel must be replaced with
Type 304 stainless steel for Step III.
Valves need not be of the sealed type. However, leak-
age must be kept to a nominal amount. Special attention must be given to
those valves located outdoors so that adequate protection is provided against
freeze-up. Separate vent and drain lines for each valve are to be provided
if necessary to insure complete venting and draining of the valve along with
its associated piping.
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Fromm, L.W.; Bernsen, S.A.; Bullinger, C.F. & Matousek, J.F. PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I, report, July 15, 1957; Lemont, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1023272/m1/45/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.