Method for detecting and correcting for isotope burn-in during long-term neutron dosimetry exposure

Patent · 31 December 1987

OSTI ID:866614

Ruddy, Francis H ^[1]

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1. Monroeville, PA

A method is described for detecting and correcting for isotope burn-in during-long term neutron dosimetry exposure. In one embodiment, duplicate pairs of solid state track recorder fissionable deposits are used, including a first, fissionable deposit of lower mass to quantify the number of fissions occuring during the exposure, and a second deposit of higher mass to quantify the number of atoms of for instance .sup.239 Pu by alpha counting. In a second embodiment, only one solid state track recorder fissionable deposit is used and the resulting higher track densities are counted with a scanning electron microscope. This method is also applicable to other burn-in interferences, e.g., .sup.233 U in .sup.232 Th or .sup.238 Pu in .sup.237 Np.

• Research Organization: WESTINGHOUSE HANFORD CO
• DOE Contract Number: AC06-76FF02170
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4749866
• OSTI ID: 866614
• Country of Publication: United States
• Language: English

Related Subjects

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232
233
237
238
239
alpha
applicable
atoms
burn-in
correcting
counted
counting
densities
deposit
deposits
described
detecting
dosimetry
dosimetry exposure
duplicate
during-long
electron
electron microscope
embodiment
exposure
fissionable
fissionable deposit
fissionable deposits
fissions
including
instance
interferences
isotope
isotope burn-in
long-term
mass
method
microscope
neutron
neutron dosimetry
np
occuring
pairs
quantify
recorder
resulting
scanning
scanning electron
solid
term
term neutron
track
track recorder