Interlock Defeat

System(s) Affected:
Targets

Interlock to be Defeated:
STF BYP-001 Pinned: Water Jacket Low-High Level

Implementation:	Number:
Date: 2024-08-07 Time: 21:06:00	2024-397
Implemented By: David Bandiera
In Consultation With:

Status: Removed

Estimated Duration:
1 weeks

Reason for Defeat:
Low-High Level sensor in the STF Water Column is showing Not OK and tripping the beam. The Water Jacket level is not changing and is stable. OK'd by Louis after discussion.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
1) DCR Defeat Board

2) SAB2 Rack 1-A

How Was Defeat Implemented?
Where is Defeat Located?:
Pin placed in STF Defeat Board signal BYP-001 at the rear of Rack 1-A on SAB2.

Describe Alternate Protection:
Other STF Water Jacket level sensors are active, in particular the Low-Low level sensor is active. Water Jacket level being actively monitored in DCR

Fault Reports:

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-12-05 Time: 14:51:00	2024-397
Removed by: David Bandiera

Status: Removed

Interlock Verification Method:
Water level stable in the water column. Pin removed from STF BYP 005 and no trip.

Number of Tags Removed:
2

Comments: