Interlock Defeat

System(s) Affected:
Safety

Interlock to be Defeated:
BSM #40 Trip limit raised

Implementation:	Number:
Date: 2024-12-07 Time: 22:15:00	2024-546
Implemented By: Frank Hosta
In Consultation With:

Status: Removed

Estimated Duration:
2 weeks

Reason for Defeat:
BSM reading high due to configuration of experiment. Defeat level increased from 25 mSv/hr to 28 mSv/hr. (Warn limit increased from 12.5 mSv/hr to 14 mSv/hr).

Number of Yellow Tags:
2

Location of Defeat Tag(s):
1) Back of rack A

2) MCR Dft board

How Was Defeat Implemented?
Where is Defeat Located?:
RMS PC in DCR Rear Rack A

Describe Alternate Protection:
BSM still trips at a slightly higher value.

Fault Reports:

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-12-17 Time: 04:33:00	2024-546
Removed by: Sierra Dean

Status: Removed

Interlock Verification Method:
Returned BSM to original value of 25 mSv/hr from RMS PC in the rear of DCR Rack A.

Number of Tags Removed:
2

Comments:

Eric Chapman: 2024-12-17 04:45:17.381373
Approval granted via email only until Dec 17th.
Frank Hosta: 2024-12-07 22:18:44.18544
Permission to raise warn level granted by Roxanna via e-mail.