COOLING AND VENTILATION FOR THE HIRADMAT FACILITY Paul

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COOLING AND VENTILATION FOR THE HIRADMAT FACILITY Paul PEPINSTER – Magali MENDEZ EN-CV 26/05/2011

COOLING AND VENTILATION FOR THE HIRADMAT FACILITY Paul PEPINSTER – Magali MENDEZ EN-CV 26/05/2011 Hi. Rad. Mat Review 1

Outline • Ventilation: – Requirements – Principles and functionnal analysis – Safety issues –

Outline • Ventilation: – Requirements – Principles and functionnal analysis – Safety issues – Failure modes-consequences • Cooling: – Tests stands – Beam dump 26/05/2011 Hi. Rad. Mat Review 2

Hi. Rad. Mat ventilation overview 26/05/2011 Hi. Rad. Mat Review 3

Hi. Rad. Mat ventilation overview 26/05/2011 Hi. Rad. Mat Review 3

Ventilation requirements: HRM area dynamic confinement 26/05/2011 Pression relative Zone TNC (par rapport à

Ventilation requirements: HRM area dynamic confinement 26/05/2011 Pression relative Zone TNC (par rapport à TA 7 et TCC 6) Débit d'extraction [m 3/h] 0 1000 2000 3000 4000 0 -5 -10 -15 Pression [Pa] • Irradiation area (TJ 7+TNC) underpressured compared to the neighboring zones at least 20 Pa. • Design extraction flow rate: 1000 m 3/h • First test performed with preliminary extraction system: 20 Pa is reached but with too high flow rate (2500 m 3/h) tightness to improve to extract less than 2000 m 3/h. -20 -25 Hi. Rad. Mat Review 4

Ventilation requirements: Flushing of the area Concentration • Dilution of the airborne contamination before

Ventilation requirements: Flushing of the area Concentration • Dilution of the airborne contamination before access: dilution factor ≥ 600. • CFD study shows that it takes around 1 hour with 15’ 000 m 3/h • With the TNC area extended to TJ 7, could take 1. 5 – 2 hours 1 0. 9 0. 8 0. 7 0. 6 0. 5 0. 4 0. 3 0. 2 0. 1 0 Volume Averaged Concentration Maximum concentration Monitor limit value 0 10 20 30 40 50 60 70 Time (min. ) 26/05/2011 Hi. Rad. Mat Review 5

Ventilation: air extraction • • • High efficiency filtration (HEPA) H 14 Bag in

Ventilation: air extraction • • • High efficiency filtration (HEPA) H 14 Bag in – bag out filter box Rejection at BA 7 roof level : – – 26/05/2011 Requirement: v≥ 10 m/s, h≥ 2 m from roof surface 2 different flow rates = 2 chimneys Hi. Rad. Mat Review 6

Ventilation: shaft 846 • Only emergency exit for people working in TNC in case

Ventilation: shaft 846 • Only emergency exit for people working in TNC in case of fire • Instruction technique IT 246: – Differential pressure > 20 Pa compared to TNC (in access operating mode) – Air velocity through TNC/shaft door opening ≥ 0, 5 m/s (shaft upper level door being closed) to prevent smoke from invading shaft. • 2 air handling units: – N+1 redundancy – Flow rate = 3600 m 3/h 26/05/2011 Hi. Rad. Mat Review 7

Indoor conditions Zone Dry bulb temperature [°C] Dew point temperature [°C] TNC 25± 2

Indoor conditions Zone Dry bulb temperature [°C] Dew point temperature [°C] TNC 25± 2 < 12°C ± 1°C PA 7 and TA 7 25± 2 Not controlled Shaft 846 Winter: 12± 3 Not controlled Summer: ≥ 12± 3 (no cooling) 26/05/2011 Hi. Rad. Mat Review 8

26/05/2011 Hi. Rad. Mat Review 9

26/05/2011 Hi. Rad. Mat Review 9

Operating modes Mode Run/leak Flush Access AHU Smoke extraction On UACV 1 -00249 Off

Operating modes Mode Run/leak Flush Access AHU Smoke extraction On UACV 1 -00249 Off UUW 1 -00137 Off UUW 1 -00138 On (low speed) (60% of the extracted flow rate) On (high speed) On (low speed) On (high speed) On Off Off UACW 2 -00481 On Off Off UACV 1 -00253 On On UACV 1 -00254 Stand-by 26/05/2011 On (high speed) Hi. Rad. Mat Review 10

BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 0 -16000

BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 0 -16000 m 3/h UACV 1 -00249 0 -15000 m 3/h PA 7 shaft UACW 2 -00481 26/05/2011 TNC Hi. Rad. Mat Review 11

RUN mode (or leak mode) BA 7 UUW 1 -00138 0 -2000 m 3/h

RUN mode (or leak mode) BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 0 -16000 m 3/h UACV 1 -00249 0 -15000 m 3/h PA 7 shaft TNC area underpressured UACW 2 -00481 TNC doors closed 26/05/2011 Hi. Rad. Mat Review 12

RUN mode + drying BA 7 UUW 1 -00138 0 -2000 m 3/h UUW

RUN mode + drying BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 0 -16000 m 3/h UACV 1 -00249 0 -15000 m 3/h PA 7 shaft TNC area underpressured UACW 2 -00481 TNC doors closed 26/05/2011 Hi. Rad. Mat Review 13

FLUSH mode BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137

FLUSH mode BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 16000 m 3/h UACV 1 -00249 15000 m 3/h PA 7 shaft UACW 2 -00481 TNC doors closed 26/05/2011 Hi. Rad. Mat Review 14

SHUTDOWN / ACCES mode BA 7 UUW 1 -00138 2000 m 3/h UUW 1

SHUTDOWN / ACCES mode BA 7 UUW 1 -00138 2000 m 3/h UUW 1 -00137 0 -16000 m 3/h UACV 1 -00249 0 -15000 m 3/h PA 7 shaft UACW 2 -00481 TNC doors open 26/05/2011 Hi. Rad. Mat Review 15

Smoke extraction (smoke in TNC) BA 7 UUW 1 -00138 0 -2000 m 3/h

Smoke extraction (smoke in TNC) BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 16000 m 3/h UACV 1 -00249 10000 m 3/h PA 7 shaft UACW 2 -00481 26/05/2011 TNC Hi. Rad. Mat Review 16

Smoke extraction (smoke in PA 7 area) BA 7 UUW 1 -00138 0 -2000

Smoke extraction (smoke in PA 7 area) BA 7 UUW 1 -00138 0 -2000 m 3/h UUW 1 -00137 16000 m 3/h UACV 1 -00249 10000 m 3/h PA 7 shaft UACW 2 -00481 26/05/2011 TNC Hi. Rad. Mat Review 17

Ventilation: fire safety issues Ventilation system stopped on fire detection Outdoor fire brigade switchboard

Ventilation: fire safety issues Ventilation system stopped on fire detection Outdoor fire brigade switchboard Equipment secured power supply Location Type of supply Network UACV 1 -00249 fan UIAE-00249 876 -R 001 3 P+N+H Secured UUW 1 -00137 fan UIAC-00249 876 -R 001 3 P+N+H Secured UUW 1 -00138 fan UIAC-00249 UACV 1 -00253/254 fan UIAE-00251 876 -R 001 3 P+N+H Secured 846 3 P+N+H Secured Equipment 26/05/2011 Cubicle Hi. Rad. Mat Review 18

Ventilation: safety related to fluids Dehumidification unit UACW 2 -00481 in TA 7: –

Ventilation: safety related to fluids Dehumidification unit UACW 2 -00481 in TA 7: – Chilled water for cooling coil; closed circuit, not contaminated, no risk. – Condensation water: collection into container (level controlled) for RP analysis. 26/05/2011 Hi. Rad. Mat Review 19

Failure modes - consequences Event Consequence Underpressure not reached before HRM Dynamic confinment of

Failure modes - consequences Event Consequence Underpressure not reached before HRM Dynamic confinment of TNC not assured run Extraction UUW 1 -00138 fails during leak Dynamic confinment of TNC interrupted mode Air supply UACV 1 -00249 or air extraction UUW 1 -00137 during flush mode Airborne dilution not assured in TNC area Failure of air supply UACV 1 -00253 (shaft Overpressure in shaft 846 not assured 846) Others? 26/05/2011 Hi. Rad. Mat Review 20

Hi. Rad. Mat cooling overview 26/05/2011 Hi. Rad. Mat Review 21

Hi. Rad. Mat cooling overview 26/05/2011 Hi. Rad. Mat Review 21

Cooling of the tests stands (1) Users requirements Users water flow rate need at

Cooling of the tests stands (1) Users requirements Users water flow rate need at ΔP = 8 bar Test bench 3 m 3/h Required cooling power Water supply temperature 30 k. W 27°C Refurbishment of the former « collimator cooling station » in TA 7: • Existing pumps conserved • New heat exchanger • New expansion vessel Cooling station parameters Deliverded flow rate at ΔP = 7 bar Delivered cooling power Primary side temperatures [°C] Secondary side temperatures (users) [°C] Test bench 26/05/2011 4 m 3/h 35 k. W 24 -34 Water leak is collected by the drainage and sump 27 -37 Hi. Rad. Mat Review 22

Cooling of the tests stands(2) • • • 26/05/2011 Primary side: raw water from

Cooling of the tests stands(2) • • • 26/05/2011 Primary side: raw water from « SPS loop » BA 7 Secondary side: demi water (closed circuit) Safety valves in TJ 7 close in case of leak detection Hi. Rad. Mat Review 23

Cooling of the beam dump Users requirements Users water flow rate need at ΔP

Cooling of the beam dump Users requirements Users water flow rate need at ΔP = 8 bar Beam dump 15 m 3/h Required cooling power Water supply temperature 250 k. W 27°C Connection to the BA 6 beam transfer circuit Cooling parameters Deliverded flow rate at ΔP = 8 bar Delivered cooling power Primary side temperatures [°C] Secondary side temperatures (users) [°C] Beam transfer circuit 26/05/2011 15 m 3/h 250 k. W 24 -34 Water leak is collected by the drainage and sump 27 -42 Hi. Rad. Mat Review 24

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