Based on the information provided, no identifiable LGBTQ+ characters or themes are present in 'The Chain Reaction'. Therefore, an evaluation of its portrayal is not applicable.

The film 'The Chain Reaction' is a 1980 Australian post-apocalyptic action movie. Based on available plot summaries and character information, there are no identifiable transsexual characters or themes present in the narrative. Therefore, the film does not offer any portrayal, positive or negative, of transsexual identity.

The film does not feature any female characters who engage in or are depicted as victorious in close-quarters physical combat against one or more male opponents. Female characters are present but do not participate in such action sequences.

The Chain Reaction (1980) is an original film with no prior source material, historical figures, or legacy characters. All characters were created for this specific movie, thus precluding any gender swaps from established canon.

The Chain Reaction (1980) is an original film, not an adaptation of existing material or a biopic. All characters were created for this specific movie, thus lacking any prior canonical or historical racial establishment to be altered.