APPENDIX C, D,... ETC.
OPTIONAL APPENDICES PROVIDING
Other appendices providing supplemental information may be provided at the author's discretion.
EXAMPLE # 1
Contingency analysis for a dry storage cask that is used to store irradiated
PWR or BWR fuel assemblies.
Flood Cask Interiora
Cask is sealed; lid is well above flood
Insert is in a noncorrosive environmentb
Loss of Neutron Poison from
criticality accident is discussed in Section 6.0.
b. Surveillance is required to ensure the integrity of this barrier. Details of
surveillance procedures are documented in Reference .
EXAMPLE # 2
Contingency analysis for a large dissolver vessel. Criticality safety margins are
maintained by controlling the mass of fissile material and the concentration of
neutron poison inside a large dissolver vessel. Inadvertent criticality can occur
by exceeding the fissile mass, dilution or improper makeup of soluble neutron
poison, or by a combination of the two.
Fissile Mass (U-235)
Mass Balance System # 1
Mass Balance System # 2
Concentration of Neutron Poison
Poison Monitor # 1
Poison Monitor # 2
A more detailed description of these controls is given in Reference __. At least two
controls are required; no further significance should be placed on the number of controls
listed in this example.