Interlock Defeat

System(s) Affected:
Safety

Interlock to be Defeated:
UCN target error pinned at IBOP I0322

Implementation:	Number:
Date: 2024-08-01 Time: 13:05:00	2024-388
Implemented By: Ryan Lovelidge
In Consultation With:

Status: Removed

Estimated Duration:
5 hours

Reason for Defeat:
B1U:TNIM2 has started frequently tripping the cyclotron and is interfering with UCN commissioning. The readbacks for 10 second, 5 minute and 10 minute timescales appear independent of steering.

Number of Yellow Tags:
1

Location of Defeat Tag(s):
1. IBOP cabinet rear of rack A.

2. MCR defeats board

How Was Defeat Implemented?
Where is Defeat Located?:
Pinned at I0322

Describe Alternate Protection:
We are only running 30nA down 1U, well below the 1uA trip threshold.

Fault Reports:

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-08-01 Time: 18:15:00	2024-388
Removed by: Travis Kurucz

Status: Removed

Interlock Verification Method:
UCN Target error pin pulled, beam development finished.

Number of Tags Removed:
2

Comments: