Final report on production test IP-289-I, Supplement 1, H reactor export flow test Page: 4 of 11
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Y " FINAL REPORT ON
VeiBy - , 5 ODUCTION TEST IP-289-I, SUPPLEMENT I
H REACTOR EXPORT FLW TESTPROCESSING DEPARTMENT
10, 1961
INTRODUCTION
The raw water export system forms the last ditch water supply system to the "0"
and "C" type reactors. In the event of electrical and steam power failure, at one
of the several reactors, the export system is designed to supply an adequate amount
of raw water coolant to the stricken reactor. A restrictive orifice plate, located
in the export pipe immediately upstream of the Groves valve in the 105 building,
limits the export flow to each reactor.
Following Project CG-558, reactor modifications at H reactor, the original 4.875-
inch export orifice was to have been replaced with a less restrictive 5.ll0-inch
orifice plate. In late 1959, Production Test IP-289-I authorized testing the ex-
port system at H reactor to assess the improvement in export flow to the reactor.
The results of the 1959 test, unfortunately, did not confirm export flow improve-
ment expectations. Instead of increasing flow, the 5.110-inch orifice actually
seemed to reduce it.
DECLSS IFIEDHw-68462
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Cremer, B. R. Final report on production test IP-289-I, Supplement 1, H reactor export flow test, report, July 10, 1961; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1310593/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.