Hi Babu,
I am assuming you meant 12.52SP1, without knowing the CR here are couple of relevant PS crash issue fixed in CR6 :
SSO Policy Server r12.52 Defect Fixes History
21955636-01
DE105858
Policy Server intermittently crashes when processing certificates.
00206326
DE133031
Policy Server restarts with Module Faults.
00374788
DE162137
Policy Server crashes while running the publish command.
If you are using earlier version , there could be more known issue fixes.
If possible , I would recommend upgrading to the latest 12.52Sp1CR7 and see if that resolves the issue.
If not, please open a ticket with CA support and provide packaged core from the crash and other relevant information for us to troubleshoot the issue.
Regards,
Ujwol Shrestha