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Water is a weak poison

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Example spent fuel reprocessing systems (at the Savannah River Site)

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Homework problems from crit safety book

• Chapter 2 problems– 1, 2, 5, 6 & 7

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Material Control & Accountability MC&AMaterial Balance Areas (MBA) Destructive Assays

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Material Control & Accountability MC&AMaterial Balance Areas (MBA) Destructive Assays

continued

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Material Control & Accountability MC&AMaterial Balance Areas (MBA) Non-Destructive Assays

• Electronic balances and load cell based weighing systems

• HPGe or equivalent (LaBr3 or CdZnTe at lower res)

• Neutron counters (shielded neutron assay probe or SNAP)

• Simple gamma counters (gross or spectral)

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MBA NDA continued• Enrichment meters (assumes chemical

form and phase)– Various alternatives looking at specific lines of U

or Pu

• High level neutron coincidence counters – Active and passive options are available

including a Cf Shuffler

• Calorimetry (effectively a gold standard for alpha emission)

• Segmented (collimated) or Tomographic (CT) gamma scanner

• Neutron multiplicity counters

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Nuclear criticality safety analysis

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Burn up credit in spent fuel

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Gd-bearing fuel

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Keff isotopic dependencies in PWR fuel

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UNF-ST&NDARDS

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Spent fuel cooling time dependencies

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More homework

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