FAST FLUX TEST FACILITY. PLANT OPERATION AND CONTROL. Page: 21 of 144
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BNWL-1023
1.2.2 Open Test Positions
Fuel, materials, and instruments may be tested in the
open positions, both in the core and reflector regions.
Coolant chemistry is entirely dependent on the main sodium
system, while temperature and flow may be variable with
respect to the main system by the use of electrical heating
or variable orifices in the test section (such devices are
dependent on successful development programs). Driver fuel
elements will be used in in-core positions where no tests
are inserted. The following paragraphs consider the testing
aspects of operation; in all other respects, the open test
positions may be considered as a normal part of the FTR
(i.e., as a driver element).
Pres tart
Variable flow mechanisms will be thoroughly function-checked.
Such flow control devices will be under the direct control
of plant operations, rather than the experimenter, in spite
of their incorporation into the test assembly. Test instru-
mentation and electrical heating in the test section will
also be function-checked.
Testing desires may influence the main system coolant
chemistry, although tests with stringent coolant purity
requirements (e.g., less than 5 ppm oxide) will be placed in
closed test loops. Test design may influence the system
preheat rates though it is more likely that tests will be
designed to withstand the expected transients.
Startup
Flow will be available in each test channel at its maximum
value with respect to the main system (i.e., variable ori-
fices will be at full flow conditions), consistent with the
protective philosophy for guarding against startup accidents.1-10
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FAST FLUX TEST FACILITY. PLANT OPERATION AND CONTROL., report, January 1, 1969; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc866152/m1/21/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.