Summing the three partial pressures:
P = PF + PG + PHe.
Using the terms given above:
P = P0(T1/T0) + 0.67 mLT1/V1 + 7.517x10-5 Q0τT1/V1
where the symbols have the meanings indicated in Table B-1.
Meaning of Symbols in the Pressure Equation (Eq. 25)
Free Gas Volume
Fill Gas Pressure at Filling psia
Mass of Oxide
Fill Gas Temperature at K
Container Heat Generation watts
B.3. Application of the Equation
B.3.1 Example Calculation of Free Volume using the "BNFL" Containers
Information on the "BNFL" container design is given in Table B-2. Can weights and volumes in
that table were determined by J. Stakebake [Stakebake 1997]. Volumes were derived from
BNFL drawings and calculations. The interior volume of the inner container does not take into
account the curvature of the can bottom. The free volume is determined as the interior volume
less the material volume of interior containers. The free volumes shown for the inner and outer
containers were agreed upon by SRS and RFETS contractor personnel and used by BNFL for
design at the direction of DOE.
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