3.11$Earthquake$ Damage$Report · ① 8 GeV$ElectronHPositron$Linear$Accelerator$ ②...
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3.11 Earthquake Damage Report 1
Transcript of 3.11$Earthquake$ Damage$Report · ① 8 GeV$ElectronHPositron$Linear$Accelerator$ ②...
3.11 Earthquake Damage Report
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Summary
a. No human casual;es b. No fatal damages to the buildings c. Facili;es & Equipment: Further inspec;on
going on
Index Map of the damages at Tsukuba Campus
– 8 GeV Electron-‐Positron Linear Accelerator – Photon Factory (PF ring/PF-‐AR/Compact ERL) – Compact ERL – Photon Factory (PF/PF-‐AR) – KEKB Accelerator – Tsukuba Experimental Hall (Belle) – Accelerator Test Facility (ATF) – Superconduc;ng RF Test Facility (STF) – Radia;on Science Center – Cryogenics Science Center – Mechanical Engineering Center – Other facili;es
Map of the damages at Tokai Campus – Linac – 3 GeV Synchrotron – 50 GeV Synchrotron – Materials and Life Science Experimental Facility（MLF） – Neutrino Facility – Nuclear and Par;cle Physics Facility
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・・・・・・・・・ 2 ・・・・・・・・・ 7 ・・・・・・・・・10 ・・・・・・・・・12 ・・・・・・・・・14 ・・・・・・・・・18 ・・・・・・・・・20 ・・・・・・・・・23 ・・・・・・・・・25 ・・・・・・・・・27 ・・・・・・・・・29 ・・・・・・・・・31
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・・・・・・・・・37 ・・・・・・・・・42 ・・・・・・・・・46 ・・・・・・・・・49 ・・・・・・・・・53 ・・・・・・・・・56
① 8 GeV Electron-‐Positron Linear Accelerator ② Photon Factory （PF ring/PF-‐AR/Compact ERL） ③ Photon Factory （PF/PF-‐AR） ④ KEKB Accelerator ⑤ KEKB Tsukuba Lab. (Belle） ⑥ Accelerator Test Facility （ATF） ⑦ Superconduc;ng RF Test Facility （STF） ⑧ Radia;on Science Center ⑨ Cryogenics Science Center ⑩ Mechanical Engineering Center ⑪ North Experimental Hall ⑫ Buildings, Power Substa;on, Roads etc
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Map of the damages at Tsukuba Campus
8 GeV Electron-‐Positron Linac
• Girders, 2 t each, deformed. Their anchor bolts were broken.
• A set of triplet quadrupole magnets, 400 kg, fell from the girder.
• Vacuum leaked through en;re accelera;ng structures, due to damages on bellows and other components.
• Two klystrons were damaged due to vacuum leak.
• Underground water flew into the tunnel. 2
A set of triplet quadrupole magnets fell
Major part of the Linac beam pipe is mounted on flexible leaf spring mechanisms, which had sustained large earthquakes in the post. This ;me the displacement was so large a quadrupole magnet put between the leaf spring moun;ng and the fixed moun;ng fell to the floor. The leaf spring to the right also surrendered.
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The linac consists of 240 units of 2 m accelera;ng structures, which has vacuum pressure at 10-‐6 Pa. The earthquake broke the vacuum of almost all structures to the atmospheric pressure. The damage due to the intrusion of debris and moisture may affect the performance.
Accelera;ng structure is made of oxygen-‐free copper (lec).
Destroyed manifolds
Accelera;ng structure
Vacuum leaked through the en;re linac
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The linac is equipped with 60 klystrons for the genera;on of microwave applied 300 kV voltage. At least two of them became unusable due to vacuum leak by the earthquake. Possibili;es of performance reduc;on remain for other units.
klystrons
Damages on the klystrons
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Underground water flew into the tunnel through the expansion joints which are located every 80 m.
Underground water flew into the tunnel
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Photon Factory （PF/PF-‐AR/Compact ERL）
• Alignments disturbed. • Components turned over. • Vacuum worsened.
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PF-‐RF System
Deforma;on of bellows around the cavity.
PF-‐AR RF
200 kW dummy load turned over.
A tool-‐rack turned over.
Misalignment of power supplies
RF System
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A pumping sta;on fell down from a carrier.
Shielding lead blocks collapsed.
Shielding lead brocks around a vacuum pipe moved.
A stored ion pump ;pped over.
Frontends
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Compact ERL
• No serious damage was observed in the facility.
• Some lamps fell down in the ERL Test Facility.
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• An ion pump turned over at AR-‐South. • The laser crystal could have been damaged. • A worksta;on was turned over. • The transfer rod was realigned. • The cracks on the floor of AR-‐South bldg was enlarged.
The damaged ion pump. The damaged worksta;on.
R&D Area of the gun and injector for Compact ERL
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Photon Factory experimental halls (PF/PF-‐AR)
• Not so serious damage in the buildings, roads, and infrastructures.
• Many instruments ;pped over and derailed.
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A power supply ;pped over.
An X-‐ray diffractometer derailed from its posi;oning rail.
A vacuum chamber ;pped over.
An X-‐ray diffractometer fell down and was broken.
Experimental hall (PF)
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KEKB Rings
• The buildings for power sta;ons were damaged. • The suppor;ng structures of air-‐fin cooler were
broken. • The klystrons moved: checks with high power are
necessary. • Magnets, rf cavi;es, vacuum components in the
tunnel look safe. • Some servers and detectors were flooded. • Stocked wigglers and bending magnets were
damaged.
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A part of the outer wall fell. Cables hung down.
The control room on 2F
While damages are most serious at the D5 sta;on, other buildings have broken ceilings, walls, and cracks on the floor.
D5 power sta;on
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As the base on the roof was broken, the cooler ;lted at D4.
The bases of AFCs at D1, D2,D5 were also broken,
AFC on the roof of D4 building
Air-‐fin cooler(AFC) for klystrons
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No serious damage has been discovered by looking outside on the magnets, vacuum components, and rf cavi;es.
No vacuum leak was observed in the ARES and superconduc;ng cavi;es as well as all beam pipes.
Tests with electric power will be necessary for confirma;on. Some devices even need beam opera;on for verifica;on.
Magnets, rf cavi;es, vacuum in the tunnel
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Tsukuba Experimental Hall
• Belle detector (1400 ton) slid several cen;meters by breaking anchor bolts
• Further inspec;on needed to check the health of inner part of the Belle detector
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Belle detector was posi;oned in the assembly hall next to the collision hall, for the major upgrade (8 meters each, weight: 1400 ton) The detector was fixed with 32 anchor bolts thru brackets. All anchor bolts were broken by the earthquake and the en;re detector slid by about 6 cm. No serious damages were observed by visual inspec;ons. Further inspec;ons are necessary, especially for inner part such as CsI crystals and glass plate detectors.
Belle detector
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ATF Test Accelerator
• All shuhers of the building was deformed. • Some radia;on-‐shielding blocks fell on
the floor. • The cable racks for the power conversion
unit were destroyed. • Misalignments of the magnets.
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A radia;on area monitor was broken.
A cable rack 420V lines fell down.
Damages at ATF
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Accelerator Cavi;es (most downstream)
Q-‐mag
A Q-‐magnet driced to north by several cm, destroyed vacuum bellows and beam duct
ATF Equipment
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Superconduc;ng RF Test Facility (STF)
• No damages to the building on visual inspec;on
• Primary cooling water system is partly damaged
• No other damages to the equipment
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Three broken 20A pipes (above photo) One buckled-‐down 300A pipe (right) One broken air-‐relief valve
Machine room of the STF building -‐ Cooling water system
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Radia;on Science Center
• Two radia;on monitors were broken. Four Ge detectors for radio-‐ac;vity measurements were broken.
• No significant damages nor leaks at Chemistry Lab and Wastewater Treatment Facility.
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When electric power supply was cut off in KEK, radia;on dose rates were measured at the boundary of radia;on control area using portable dosimeters, and it was confirmed there is no effects from KEK accelerators. Several radia;on monitors at the site boundary were powered from outside of KEK, and in early morning on March 15, gamma-‐ray dose rates increased dure to radio-‐ac;vi;es from Fukushima nuclear power plants. Radia;on control building was powered, and from March 16, dose data in KEK site are shown in KEK HP hhp://rcwww.kek.jp/norm/ KEK let eight portable radia;on survey meters and 20 pocket dosimeters to Fukushima prefectural office.
We already tested 87 radia;on monitors those send measured data correctly, though 45 ones are not ready. Two radia;on monitors at the ATF were broken.
Pb shields around a Ge detector were slipped off in Advanced Instrumenta;on Lab. Four Ge detectors were broken, and remain three detectors were used to measure redio-‐ac;vity. KEK, in conjunc;on with Na;onal Ins;tute for Environmental Study (NIES) have measured airborne radio-‐ac;vi;es. I-‐131, Te-‐132 etc. were detected, and these results are shown in the KEK home page.
Radia;on Monitors around accelerators.
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Environmental Safety Office
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• Chemistry office There was no major damage to the building.
• Chemistry Laboratory There was no major damage to the building. There was also no damage to the analy;cal equipments and we have checked the u;liza;on of the equipments. We have restarted regular water analysis services from March 22 with a limited electrical power.
• Wastewater treatment facility Some pipes in the processing plant were damaged, but have been repaired temporary. We have restarted regular wastewater treatment process from March 28. There was no oullow of wastewater form the treatment facility.
• PF Area RI wastewater treatment facility Some wastewater in the treatment tank was overflowed by the vibra;on of the earthquake, but there was no oullow of wastewater form the treatment facility.
• PS Area RI wastewater treatment facility The dilu;on treatment tank was damaged by the vibra;on of the earthquake. The RI wastewater treatment can be performed without difficulty, because the damaged tank is currently not in use.
Cryogenics Science Center
• A crane was damaged. • Mechanical supports of low-‐
vibra;on thermal insulated vacuum vessel were damaged.
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Cryogenics Science Center
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A damaged crane
Ceiling mercury lamps were damaged
He-‐recycling compressor was stalled, and the gas was released into the air.
Bags were not damaged
A crack in the wall of the Cryogenics Bldg. 2 Mechanical supports of low-‐vibra;on thermal
insulated vacuum vessel were damaged
Mechanical Engineering Center
• 58 machine tools and equipments deviated from the fixed posi;on. Ａ couple of equipments fell and the floor of 2 machines went down.
• Recovery status as of April 1st 2011: 48 machine tools were restored. We adjust to recover 10 machine tools.
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The cabinet for jigs and tools fell and the device on the cabinet also fell on the floor.
The cabinet and jig fell. Machine tool deviated from the fixed posi;on.
Machine Shop Building No.1
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Other facili;es
• Advanced Instrumenta;on Lab. ‒ Three air-‐condi;oning duct were dropped
from ceiling ‒ A part of ceiling boards fell
• North Counter Hall ‒ Part of wall panel fell in the north (14m) ‒ Shuher of the eastern gate is broken, a crack
in the north-‐eastern wall ‒ Cables fell on the rail of crane
• Water tank raptures
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Panels of northern wall fell to the ground （14m in horizontal width） Damaged cable rack by the container house
Northern wall of North Experimental Hall
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The earthquake shook water in the tank, and the vibra;on caused by the shake crippled the tank. About a half of water tanks were damaged or distorted, forcing the site-‐wide water supply to be cut by half.
Water tanks
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The ground sank due to the liquefac;on at several places, and a part of roads were damaged. There were gaps as large as 30cm, and are widening with acershocks.
Campus and roads
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Half of 12 V-‐shape insulator were damaged, and caused a site-‐wide power outage.
The rest of insulators were temporarily restored by TEPCO. Private generator provided minimum amount of electricity for 40 hours before the power was restore.
Acer the restora;on
（Equipment owned by TEPCO）
Ultra-‐High-‐Voltage Power Substa;on
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Map of the damages at Tokai Campus （J-‐PARC） ① Linac ② 3 GeV Synchrotron ③ 50 GeV Synchrotron ④ Main Control Room ⑤ Material and Life Sciences
Experimental Facility ⑥ 3NBT ⑦ Neutrino Experimental Facility ⑧ Hadron Experimental Facility ⑨ Accelerator-‐Driven Trans muta;on
Experimental Facility
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Linac
• Roads around J-‐PARC area sank and damaged.
• Side-‐buildings were severely damaged.
• Underground water flew into the Linac tunnel.
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About 1.5 m drop as seen above, over a wide area. Electric wires and water pipes were all damaged.
Entrance for Linac
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Serious cracks on the road. This is a typical one and can be seen all over the J-‐PARC area.
Road in front of Linac
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Concerning the central area of Linac, no serious damages were seen by looking from outside. As of March 17, 1 cm deep water was on the floor.
Inside Linac Tunnel (March 17)
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As of March 24, the water level went up to 10 cm. Pumping water of 100 t started on March 25 by using the motor-‐driven generator.
Inside Linac Tunnel (March 24)
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3 GeV Synchrotron
• Accelerator itself looks safe. • Power Substa;on, condenser bank
inclined and waved due to the sink of ground around the buildings.
• Likewise, cables and air-‐ducts were distorted.
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No significant damages.
3 GeV Main Ring
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The whole facility is inclined as above.
Power Substa;on
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Condenser bank was waved. Cables were distorted with heavy weight on them.
Condenser Bank for 3 GeV
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50 GeV Synchrotron
• Accelerator itself looks safe. • Underground water into the
tunnel. • No serious damages to the Main
Control Room.
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Although some distor;on is observed for cable rack, the accelerator itself seems OK as viewed only from this area.
50 GeV Main Ring
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Main Control Room was in a reasonable shape.
Main Control Room
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Materials and Life Sciences Experimental Facility（MLF）
• Sinking caused a sharp bend in the piping system.
• Beam Lines were damaged due to the sink (30 cm) of the added buildings.
• No damage observed inside of the experiment halls.
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West side road from MLF. About 1.5 m sinking was observed.
Road around MLF
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Piping system is exposed and disjointed due to the 1m sink of the ground.
Exposed manhole
Piping System
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Interior part of the Hall 1 and Hall 2 are very healthy, thanks to many underpins for the building.
MLF First Hall and Second Hall
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Neutrino Experimental Facility
• On-‐site-‐detector, Beam Transport look safe.
• Damages by the sink of ground around the facility.
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Neutrino: Beam Dump Area and Air Condi;oning
South side (viewed from upstream to downstream)
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No significant damages from outside. About 1 cm deep water at the bohom.
Neutrino: On Site Detector
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Hadron Experimental Facility
• No serious damages to the inside of experimental hall and the building.
• The ground sank around the facility.
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Due to many underpins, hadron hall looks OK. No significant damages were observed.
Hadron Experimental Hall
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About 30 cm drop all over the places. Gas storage stand is floa;ng up on the air.
Hadron Outside Area
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