Interlock Defeat

System(s) Affected:
Vacuum

Interlock to be Defeated:
EHGMS:SV01, EHMC:SV01, EHRPC:SV01, EHCD:FPV01, EHCD:FPV04, EHCD:FPV06, EINJ:FPVCD, EACA:FPVCD interlocks bypassed

Implementation:	Number:
Date: 2023-10-18 Time: 14:30:00	2023-569
Implemented By: Brandon Humphries
In Consultation With:

Status: Removed

Estimated Duration:
1 weeks

Reason for Defeat:
Cryogenics group is scrubbing the helium system in preparation for cool down.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
1-ESS safety panel

1-Cork board in the back of the DCR.

How Was Defeat Implemented?
Where is Defeat Located?:
Interlocks were bypassed through EPICS using the Bypass/Force utility.

Describe Alternate Protection:
Procedure is performed by experts while the system is warm, they will monitor any relevant signals.

Fault Reports:

Work Permits:
A2023-10-18-2

Disables:

Interlock Defeat

Removal:	Number:
Date: 2023-10-23 Time: 11:15:00	2023-569
Removed by: Brandon Humphries

Status: Removed

Interlock Verification Method:
EHCD:FPV06 and EACA:FPVCD went into a Fail-safe State as their interlocks were no longer satisfied. Others are not interlocked. Bypass indicators cleared.

Number of Tags Removed:
2

Comments:

Brandon Humphries: 2023-10-23 11:12:21.234016
At request of Cryogenics group now that the compressors are on, bypasses were removed from these valves:
EHGMS:SV01, EHMC:SV01, EHRPC:SV01

Bypasses remain in place for these valves:
EHCD:FPV01, EHCD:FPV04, EHCD:FPV06, EINJ:FPVCD, EACA:FPVCD

Interlock Defeat / Device Disable Management System v1.5 (Driver)

Interlock Defeat

Interlock Defeat

Interlock Defeat / Device Disable
Management System v1.5 (Driver)