Chemical Processing Department Monthly Report: July 1957 Page: 59 of 107
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}" of water) will activate the recorder to identify ate of rise
and umium pressure experienced in the event of a bump. It is
believed that the time lag in the switch to activate the recorder will
not distort the recording of the rate of rise. One gauge has a
pressure scale of 0 to 20 inches of water and the other gauge has a
pressure scale of 0 to 100 inches of water. It is still not planned
to intentionally produce a "bump" in the 103-A storage tank.
4. Steam Condensate Line Failures
Recurring failure of mild steel piping in the steam-trap pits out-
side the Purex Building has prompted investigation to determine the
cause of failure and to devise corrective measures. The traps carry
steam condensate from process evaporators and dissolvers. The
failures are in contact-maintained piping; however, access is diffi-
cult and requires that the plant be shut down. Present indications
are that failure results from general corrosion of the mild steel by
steam condensate containing appreciable amounts of oxygen and/or
A potentially serious aspect of this problem is that the main
condensate header for discharging Purex steam-condensate is a mild
steel line buried behind the main building. Presumably, similar
corrosion is occurring in the main header.
5. Alpha Monitor
The Purex Alpha monitor performance has continued to be satis-
factory although some counting rate meter repairs were required.
The degassers in the sampling system have shown evidence of be-
coming plugged and were back flushed to reduce plugging. The 2AW
monitor has been particularly valuable to the plant operation at
high processing rates.
B. Plant ngineering
Failure of a wheel bearing in the Purex crane on July 11 caused some
difficulty in getting the crane back to its maintenance area. A
charging operation had been completed very shortly before the failure
occurred. The failure was in the #j4 trailing wheel on the light end
of the crane, the same location as the initial failure approximately
eighteen (18) months ago. These failures are believed to result from a
slightly tapered or eliptical condition of the axle. Subsequent in-
spection of grease sampled from all other wheel bearings revealed
ferrous particles in the similar bearing of #2 trailing wheel on the
light end. This bearing was in a partially failed condition and has
been replaced. In no case has damage to the tapered roller bearing on
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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/m1/59/: accessed May 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.