Interlock Defeat

System(s) Affected:
Safety

Interlock to be Defeated:
Air Monitor 31 "IPF Hot Cell" warning level increased from 40 to 120 KCPM until end of 2024.

Implementation:	Number:
Date: 2024-10-01 Time: 15:45:00	2024-473
Implemented By: Kevin Lucow
In Consultation With:

Status: Removed

Estimated Duration:
12 weeks

Reason for Defeat:
Elevated air monitor readings at IPF.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
1) DCR defeat board. 2) RMS, rear of rack A.

How Was Defeat Implemented?
Where is Defeat Located?:
RMS computer, rear of rack A.

Describe Alternate Protection:
Air monitor warning level increased from 40 to 120 KCPM. Verified on XT page 12A.

Fault Reports:

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-12-11 Time: 19:42:00	2024-473
Removed by: Eric Chapman

Status: Removed

Interlock Verification Method:
Air Monitor #30 - IPF Hot Cell set back to default value of 40kCPM. BL1A operation done for the year, approval to raise this warn level was only granted until the end of 2024.

Number of Tags Removed:
2

Comments:

Kevin Lucow: 2024-10-01 15:52:08.380166
Defeat approved by R. Ralea, Radiation Safety Officer, via email on 2024-10-01: "Please continue operating at 120kcpm warning level for AM#31 (IPF). We will re-assess the warning level for this monitor next shutdown (jan-mar 2025)."