rp-recap of the residual dose rates in the hl-lhc …...2020/02/21 · lss 1 vs lss 5 (optics v1.3)...
TRANSCRIPT
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5A. Infantino
HSE-RP-AS
EDMS 2331769
Aim
To provide an overview/recap of the residual dose rates in LSS1 and LSS 5 in the HL-LHC era
Data based on existing C. Adorisio’s FLUKA simulations (EDMS 1868872): simulations refers to optics v1.3 → some differences with respect v1.5 (e.g. crossing planes, collimators settings, …).
This ppt: focus to the area between TAXN-D2 (± ~10m)
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
3
4
Reminder: ALARA at CERNEDMS 1751123
‘hard’ limits used to determine the minimum ALARA Level
base of a radiological risk assessment
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
Operation Scenario
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
5
HL-LHC Residual dose rate estimation
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
6
Working distance
=
40 cm
(from outer surface)
TAXN-D2 Residual Dose rates (IR1 - v1.3)
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
7
Dedicated up-to-date (v1.5)
TAXN RP-evaluation for WP8 in
A. Infantino’s EDMS 2256546.
Missing Crab cavities!
Reference cooling times for:
1 week → short accesses/TS
4 weeks → YETS
4 months → LS
TAXN-D2 Residual Dose rates (IR5 - v1.3)
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
8
LSS 1 Vs LSS 5 (optics v1.3)
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
9
Summary
Within the TAXN-D2 region, the area downstream D2 (non-IP side) shows the lowest radiation levels
Although simulations refer to optics v1.3, general outcome should be valid for v1.5 → locally, absolute values might be different.
Useful References:
C. Adorisio, HL-LHC - Residual Dose Rate Estimations in the LSS1 and LSS5 (from TAXS up to Q7) - EDMS 1868872 (link)
A. Infantino, HL-LHC TAXN: RP considerations on shielding requirements - EDMS 2256546 (link)
A. Infantino (HSE-RP)
RP-recap of the residual dose rates in the HL-LHC LSS 1 and 5
21.02.2020 – EDMS 2331769
10
