Interlock Defeat

System(s) Affected:
Safety

Interlock to be Defeated:
TR30-2 Air monitors 24, 25 & 26 Bypassed

Implementation:	Number:
Date: 2024-12-11 Time: 18:55:00	2024-556
Implemented By: Eric Chapman
In Consultation With:

Status: Active

Estimated Duration:
999 weeks

Reason for Defeat:
Air Monitor #24 - TR30-2 Vault,

Air Monitor #25 - TR30-2 Hot Cells and

Air Monitor #26 - TR30-2 Fume Hood Bypassed.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
DCR Rack A rear, defeats board.

How Was Defeat Implemented?
Where is Defeat Located?:
DCR rear of Rack A, AM 24,25,26 pinned with white "permanent" jumpers

Describe Alternate Protection:
Air monitors warnings and levels are monitored in ATG control room. Alarm levels set in DCR rack A in the Central Safety System. DCR Alarm point is a backup, can be enabled when requested by ATG.

Fault Reports:

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: Time:	2024-556
Removed by:

Status: Active

Interlock Verification Method:

Number of Tags Removed:
0

Comments:

Eric Chapman: 2024-12-11 18:58:10.474048
Defeat created as record of long standing operations practice.