Chemical Processing Department Monthly Report: July 1957 Page: 61 of 107
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2. CA-719 - Additional Facilities to Handle Purexa Vapor Wastes
Subsequent to the start of detail design for the subject facilities,
numerous problems were encountered in the existing tank farm vapor
system that necessitated a review of the design scope. Repairs per-
formed recently on the loop seal to one of the contact condensers
encountered radiation levels considerably higher than was anticipated
in the original design scope for the new facility. These radiation
levels are considerably in excess of the levels under which physical
or contact maintenance of the proposed facility could reasonably be
expected to be performed. Also the condenser off-gas exhaust system,
constructed of carbon steel has been found to be severely corroded
and rapidly approaching the point of failure. Corrosion of this
carbon steel system has been caused by the periodic handling of acidic
vapors. Sampling and testing of vapors in the vapor handling system
indicate that acidic vapors are formed, subsequent to the condensation
of the vapors from the waste tanks. The vapors to the contact con-
densers and the condensate from the condensers have a pH of about 9.
However, the non-condensibles exhausted from the condensers are
occassionally acidic and corrosive in nature. A review of these
problems and their effect on the facility indicate the need for
revision of the design scope. Major changes in the scope are expected
a. Increased shielding wall thickness for the condenser house, pump
pits and piping encasements.
b. Provision of a diversion box for alternate routing of condensate
in place of direct buried valving.
c. Provisions for semf-remote connectors to surface condensers and
the condensate tank pumps.
d. A new condenser vent system complete with stainless steel exhaust
fans, de-entrainment vessels, stack and piping.
The proposed revisions to the design scope of the facility are being
reviewed to determine if more economic approaches could be achieved.
A. Research and Development
Work was initiated with Process Control Development, Hanford Laboratories
Operation, for development of a gamma absorptometer to be combined with
an improved pH system for use on Redox IAFS stream. Combining the pH
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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/m1/61/: accessed May 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.