Interlock Defeat

System(s) Affected:
Safety

Interlock to be Defeated:
BSM 56 working levels increased.

Implementation:	Number:
Date: 2024-11-07 Time: 18:29:00	2024-507
Implemented By: Ryan Anderson
In Consultation With:

Status: Removed

Estimated Duration:
1 days

Reason for Defeat:
For BL1U production. Defeat is in place until default levels set to match.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
Back of Rack A in DCR

DCR defeat board.

How Was Defeat Implemented?
Where is Defeat Located?:
Working level set to 40 (40000 mSv/hr) using computer in back of Rack A.

Describe Alternate Protection:
UCN BSMs plotted in DCR, watching during kicking. Approved by RSO by email Nov 7, 2024.

Fault Reports:

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-11-12 Time: 00:30:00	2024-507
Removed by: Eric Chapman

Status: Removed

Interlock Verification Method:
BSM 56 restored to nominal operating value of 10. UCN not operating until next week.

Number of Tags Removed:
2

Comments:

Kevin Lucow: 2024-11-12 23:17:39.016421
Default value permanently changed by Safety Group under C2024-11-12-3.
Eric Chapman: 2024-11-12 00:39:46.865944
Re-implement as required up to maximum as specified by RSO. Note that spills can be significantly reduced during 1U operation by reducing ISIS pulser.