Chemical Processing Department Monthly Report: July 1957 Page: 25 of 107
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the period of scheduled operation.
Canyon equipment replaced during the month included the H-4
Oxidizer coil bundle, the D-14 backcycle pump, and four jumpers.
2. Insaction and Maintenance
A total of 232 inspection cards were issued during the month,
of which 116 were returned by the respective foreman, together
with 76 from pr evious months. At the present time 222 inspec-
tion cards are outstanding, the majority of which are in the
instrument group. This increase over previous months is due
to the lack of available manpower. As replacement manpower
is obtained, this backlog of outstanding inspections is
expected to be reduced to a normal level.
Considerable trouble was experienced this month with the optics
on the 60-T canyon crane. Replacement of both the left and
right hand optic heads was necessary in order to increase the
visibility of the crane operators. Difficulties were also
experienced with the rotational mechanism on the left hand
optic on 7-23-57 and again on 7-31-57, necessitating exten-
sive repair before satisfactory operation was again establish-
On 7-23-57 a total power loss to the 60-T canyon crane occurr-
ed when the current collector wheels jumped off the trolley
cable. This caused one support bracket to be badly damaged,
a supporting insulator to be broken and a severe bend in one
of the trolley cables. Repairs were completed on 7-24-57
and subsequent operation has been satisfactory. Improved
radiation working conditions on the crane with respect to
time limits permitted repairs to be made in approximately
16 hours. Previous to the extensive canyon and crane
decontamination program, which was initiated during May, it
is questionable whether this work could have been completed
inside of two weeks.
On 7-29-57, a second electrical failure was experienced on
the 60-T canyon crane when the insulation on the crane
charging wrench became so worn that it shorted out. Re-
pairs were effected by splicing in a new section of cable.
The D-14 backcycle pump which failed on 7-21-57, probably
due to a bearing seizure, was replaced with a glass bear-
ing pump. This is the second glass bearing pump installed
in the Redox Facility, the first having been placed in
service on 4-9-57 in the F-1 feed tank position. The D-14
installation was made in an effort to resolve the frequent
pump failures in this position.
Following the installation of the D-14 pump, noted above,
it was found that the D-14 thermohm jumper could not be
installed due to a bent head. A new rigid jumper was
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Hanford Atomic Products Operation. Chemical Processing Department. Chemical Processing Department Monthly Report: July 1957, report, August 22, 1957; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1312193/m1/25/: accessed May 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.