PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I Page: 25 of 161
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These systems will be energized automatically and/or manually upon re-
ceipt of certain alarm signals indicating abnormal operating conditions.
There are a large number of control systems involved in
the many plant auxiliaries; however, these components are of a standard
nature. They concern such operations as water-level detection in storage
tanks, and general purpose cooling water flow, temperature measurement,
The most significant ARBOR control systems are described
in the following paragraphs.
2. Reactor Control
The primary control of the reactor is accomplished by
means of neutron-absorbing control rods, driven into or out of the reactor
core by means of drives located at the top of the reactor vessel. The rod
drives are operated from the control console. Rod controls are interlocked
in a way that only the central control rod and one other rod may be removed
from the core simultaneously. The speed of rod removal is limited in order
to prevent too rapid an increase in reactor power. Provision is made to ef-
fect a rapid injection of all control rods into the reactor core (control rod
scram), an action accomplished either manually or automatically upon re-
ceipt of certain abnormal system indications. During normal operation the
control rods are operated either manually or automatically in response to
various signals derived from the parameter control jack board (see Sec-
3. Reactor Water-Level Control
The water level in the reactor pressure vessel is controlled
by a conventional three-element boiler feed-water control circuit.
The differential pressure water-level recorder produces a
signal proportional to the error in water level (difference between the man-
ually adjusted set point and the measured level). This error signal is added
to another error signal proportional to the difference between total steam
flow and feed-water flow; this combined error signal is used to adjust the
position of the feed-water control valve.
The combined error signal may be expressed as:
e = K1 (L - L)+K2(S - W) ,
Ki , KZ = proportionality constants
- = water level set point (manually adjusted)
L = measured water level
S = measured total steam flow
W = measured feed-water flow
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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/m1/25/: accessed March 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.