Chemical Processing Department Monthly Report: July 1957 Page: 44 of 107
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E. Analtical control Oeration (Continued)
Five plutonium metal exchange samples from Dow were analyzed for
Chemical Assay, Carbon, 70-58, and spectrographic impurities. These
will be compared with analyses from Rocky Flats and Los Alamos. On
the last exchange HAM results checked very favorably with those of
the other two sites.
The supervisor of the Final Inspection Operation attended a meeting
on non-destructive testing at Rocky Flats during the week of July 15th.
The representatives from Rocky Flats, LASL, and Hu discussed mutual
problems on radiography and non-destructive testing techniques in
regard to model 65 fabrication.
F. Radiation MoitorinR p0 eration
Eleven radiation occurrences were documented in July as compared to
ten in June. The breakdown for the various operations is as follows:
Metal Finishing - three, Product Recovery - two, Analytical Control - one,
Maintenance - two, Uranium Reduction - three, Radiation Monitoring - none.
Sixteen cases of skin contamination were reported in July as compared to
twelve cases in June. The breakdown for the- operations is as follows:
Metal Finishing - three, Product Recovery - one, Analytical Control - two,
Maintenance - eight, Uranium Reduction - two, and Radiation Monitoring -none.
There has been no change in the exposure problem of the Metal Finishing
Operation. Re-interpretation of badge readings is expected early next
The contamination problems in the 224-UA Building mentioned in last month's
report have not improved but no radiation occurrences were attributed to the
Four new cases of internal plutonium deposition were discovered in CPD
during the first six months of 1957. All cases concerned employees in
Finished Products and were described in Radiation Occurrences. The
deposition did not exceed 1% of the maximum permissible limit in any
case and the work status of the involved employees is unaffected.
The 234-5 stack emission averaged 18 uc of plutonium/day during July.
This is nearly a factor of two increases over the previous month and
nearly a factor of four increases over the average for the previous
six months. The most obvious and probably the major contributor is the
exhaust from Task II. This exhaust carries considerable HF fumes from
Task II process leaks and causes rapid deterioration of the primary
filter. An accelerated program of inspection and filter replacement has
been adopted in order to reduce this emission.
The failure of a gasket on the primary filter box servicing hood #13
in room #264 caused a gross spread of contamination in rooms 263 and
264. All of the contamination was contained within these rooms and
subsequent cleaning is continuing.
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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/m1/44/: accessed May 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.