SLIDE 1
TPS Personnel Safety Interlock
shared tunnel of storage ring and booster Beamline hutch during Beam-On
Beamline Group Radiation and Operation Safety Div.
TPS Beamline Radiation Safety Interlock, a Bizarre Incident and its - - PowerPoint PPT Presentation
TPS Beamline Radiation Safety Interlock, a Bizarre Incident and its - - PowerPoint PPT Presentation
TPS Beamline Radiation Safety Interlock, a Bizarre Incident and its Remedy Actions Joseph Liu, C.R. Chen Radiation and Operation Safety Division TPS Personnel Safety Interlock shared tunnel of storage ring and booster Beamline hutch during
SLIDE 2
SLIDE 3
Beamline Interlock
Global Instrument & Control
- Exp. Hutch
emergency
- Op. Hutch
emergency Front-End abnormal RF enable/disable Control Room display/reset
TPS BL Interlock Logic Diagram
- Rad. Safety
abnormal
FE Interlock HMS, PAB
SLIDE 4
Management Structure
Accelerator Front end Optics hutch Experiment station
Trip beam RF CR enable Control room Heavy metal shutter Shielding wall Photon shutter Optical element End station Photon absorber
I&C
Beamline Group Vacuum Group Precision Mechanical Engineering Group RF Group Instrumentation & Control Group Accelerator Operation Group
SLIDE 5
Beamline Emergency
Global Instrument & Control
- Exp. Hutch
emergency
- Op. Hutch
emergency Front-End abnormal RF enable/disable Control Room display/reset
TPS EMG Shut-down
- Rad. Safety
abnormal
SLIDE 6
Upstream protects downstream
Timer > 3 sec? Hutch security failed yes no Photon shutter closed? yes normal no BL not ready to FE Close HMS in FE
SLIDE 7
Interlock Logic Reviewed
Hutch Secured CR Enable* Emergency Stop Search start Button Door Closed Door locked Duck locked Search Completed Button Audio & Visual Alarm PS Closed Hutch Search Completed Enable PS Key Secured HMS Open Interlock Approval * Optics hutch: CR to FE Enable
- Exp. Hutch: CR to BL Enable
PAB Close CP Air Normal FCV Open
BL Operation Approval Logic Component Protection Logic
Beamline Ready Radiation Safety Enable
FE Op. Approval Logic
CR to FE Enable
Bypass Logic
Bypass mode (Interlock Off)
Safety Protection Logic Push Button Logic
HMS Push Button On Drive HMS Open Signal (HMS to PAB) Operation Enable
FE HMS Interlock Hutch Interlock
SLIDE 8
Safety Report By Committee Interlock Check By BL & other Radiation Survey By ROSD Readiness Review By Committee
- thers
TPS-05A
@300mA 4/19
Mask shielding OK
TPS-09A
@300mA 4/19
Mask shielding OK
TPS-21A
@250mA 5/19 @300mA 5/26
5/26
Mask shielding OK
TPS-23A
@300mA 5/26
（Temporary）
5/26 Mask shielding OK
TPS-25A
@300mA 4/19
Mask shielding OK
TPS-41A
×＠250mA 5/19 ×＠300mA 5/26
Mask shielding OK
TPS-45A
TPS BL Safety Review
OPEN OPEN OPEN OPEN TEST Install Install
SLIDE 9
TPS 23 Incident Sep. 22, 2016
1.
Radiation survey-OK
2.
Measure dose inside hutch
3.
HMS failed to close
BG BG BG BG
BG BG
(Not installed) (Not installed)
SLIDE 10
Radiation Exposure
1.3 mSv 0.3 mSv 0.03 mSv TLD reading
(Not installed) (Not installed)
Average dose rate = 160 mSv/h
SLIDE 11
Sequence
SOP to access hutch ① close HMS ② unlock door ③ open door Consequence ① HMS didn’t close ② beam didn’t trip
SLIDE 12
The Cause
- BEAM ON when HUTCH OPEN
National Instruments, NI Compact RIO 9074
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Remedy Actions-FE
- NI Distributed System Manager on NI Compact
RIO 9074----BUG
- Short term:
- Switch IO from Real Time platform to FPGA system
- Adding PLC as a watch dog
- Mid term:
- Fail-Safe
- Redundancy
SLIDE 14
Second route to trip beam
Remedy Actions-BL
Door locked when beam-on
SLIDE 15