Portable instrument for inspecting irradiated nuclear fuel assemblies

Patent · Tue Jan 01 00:00:00 EST 1985

OSTI ID:865323

Nicholson, Nicholas ^[1]; Dowdy, Edward J ^[1]; Holt, David M ^[1]

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1. Los Alamos, NM

A portable instrument for measuring induced Cerenkov radiation associated with irradiated nuclear fuel assemblies in a water-filled storage pond is disclosed. The instrument includes a photomultiplier tube and an image intensifier which are operable in parallel and simultaneously by means of a field lens assembly and an associated beam splitter. The image intensifier permits an operator to aim and focus the apparatus on a submerged fuel assembly. Once the instrument is aimed and focused, an illumination reading can be obtained with the photomultiplier tube. The instrument includes a lens cap with a carbon-14/phosphor light source for calibrating the apparatus in the field.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4497769
• OSTI ID: 865323
• Country of Publication: United States
• Language: English

Related Subjects

portable
instrument
inspecting
irradiated
nuclear
fuel
assemblies
measuring
induced
cerenkov
radiation
associated
water-filled
storage
pond
disclosed
photomultiplier
tube
image
intensifier
operable
parallel
simultaneously
means
field
lens
assembly
beam
splitter
permits
operator
aim
focus
apparatus
submerged
aimed
focused
illumination
reading
obtained
cap
carbon-14
phosphor
light
source
calibrating
portable instrument
image intensifier
lens assembly
irradiated nuclear
fuel assemblies
beam splitter
light source
nuclear fuel
fuel assembly
photomultiplier tube
cerenkov radiation
storage pond
field lens
multiplier tube
/376/250/976/