アメリカ以外の核に反対する団体 NCIが
J. Carson Mark Explosive Properties of Reactor Grade Plutonium
として配布する文書より、結論部分。

IV. Conclusions

1. Taking "weapon" to signify an object suitable for
stockpile by a military organization,then heavily irradiated
reactor plutonium would not be attractive for an arsenal of
pure fission devices.

For that purpose one would wish to have a set of warheads
with a reliable known yield.---