The 20-year-old will compete at her usual weight in the British Championships in Manchester, but is not ruling out a change later in the year, having claimed
gold in two weight categories
at the recent Polish Open.
"I'm going to see if I can do 67 and make the weight and try for that spot," Walkden told BBC Sport.
"Obviously I'll be the reserve for that spot if [world champion]
gets injured or can't make it then I'll step in, but if there's anything I can do to try and go anyway, I'll try.
Walkden added, "I can't give up can I? It's not me, I'm going to go for it."
Stevenson, her likely rival for the -67kg division Olympic position, is not competing at the British Open.
Team GB Olympic contenders:
One fighter from each of the divisions will be selected for Team GB in 2012
Great Britain's performance director Gary Hall has hailed the field for the British Championships as the 'strongest ever'.
Stevenson's absence aside, GB's three other World Championship medallists, J
will all be in action on the first day of competition.
"Outside the World Championship, it is probably the best quality line-up assembled for an Open of this kind," said Hall.
On Sunday attention will turn to the men's -80kg division where European Champion and former World number one
will compete for the first time on home soil since he decided to
quit the GB programme
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.