§ Mr. Robin Cookasked the Secretary of State for Energy if he will publish in the Official Report a typical inventory of the different plutonium isotopes carried in a package of plutonium nitrate between Dounreay and Sellafield.
§ Mr. GoodladThe isotopic composition of the plutonium nitrate liquor in any package will vary with its radiation history. The following breakdown is roughly typical:
per cent. Plutonium 239 70 Plutonium 240 25 Plutonium 241 4 Other isotopes 1