i think you can't access the constants directly but you can use the constants in the ts-setup.
with plugin.tx_myplugin.settings.myPid = {$myConstant}
in the ts-setup you can access the pid in your plugin with {settings.myPid}
if you're not using a plugin but a TS FluidTemplate you can assign it them like this:
page = PAGE
page {
10 = FLUIDTEMPLATE
10 {
file = fileadmin/templates/Home.html
variables {
pidList {
myConstant = {$myConstant}
myConstant2 = {$myConstant2}
}
}
}
}
<f:link.page pageUid="{pidList.myConstant}" >Link</f:link.page>