NCSX VACUUM VESSEL PL Goranson Final Design Review November 17, 2005 Man Access Port /Lateral Supports NCSX

Talk Overview CHARGE STATUS BACKGROUND PUMPING PORT / LATERAL SUPPORT CONCEPT DRAWINGS ANALYSES CONCERNS CHIT RESOLUTION CONCLUSION

NCSX Charge 1. Is the design of the VV lateral support system adequate for normal, fault, and handling loads, including upgraded first wall and a full complement of diagnostics? 2. Do the supports have adequate capability and adjustment to facilitate field period assembly, final assembly, and motion during cool-down and bake-out? 3. Is the personnel access port adequate for initial operation and maintenance? 4. Are the interfaces with other systems (primarily the mod coil shell and cryostat) adequately defined? 5. Are the analyses complete and documented, including stress in the port assembly and heat leak to the mod coils? 6. Are the design drawings adequate for procurement?

NCSX Status-Drawings & Other Design Req. DrawingsNameStatus SE Man Port AssyIssued SE Man Hole Port WeldmentIssued SE Port Cover ModificationIssued SE MCD Flange ModificationIssues SE Lateral Supports Weldments and DetailsIssued DACS Related documents NCS-CALC Design Basis Analysis VV Structural Analysis/Seismic Analysis NCSX-CALC Lateral Support Bracket Analysis NCSX-CALC Man Access Lateral Support Bracket Analysis New, analysis is complete, DAC is being checked. CHITS Outstanding chits from FDR resolved

NCSX Background Decision to delay Neutral Beam Transition Duct (NBTD) left no pumping duct or man access into VV –NB port cover not removable from outside –Port 4 would give inadequate conductance for pumping –Special mod kit on NB port cover required to react lateral loads Cost effective replacement for NBTD was desirable

Pumping port duct concept proposed for replacing NBTD had problems NCSX Original Proposal Did not significantly reduce cost compared to NBTD Did not provide man access - bolts only accessible from inside VV - needs transition joint

NCSX Man Access Port Concept Splits original duct concept into two parts - interface duct supplied by WBS 12 -a pumping duct by WBS 2 Electrical breaks part of pump interface

Man Access/Pump Port Design NCSX 21” access duct on NB ports, accessible from outside - uses commercial SS wire seal flange - flange is interface for cryostat boot - can be retrofit onto NB blank-off port - body is Inconel to permit 350 C bakeout

Lateral Support NCSX Same components and location as NBTD design Loads are the same Analyses documented for mount - stresses are low - DAC in work

NCSX Cryostat Interface Present wall interface interferes -Cryostat penetration at NB port needs to opened up to accommodate Man Access port Flange clears wall Supports lie within outer boundary 27” flange perimeter is Cryostat boot interface

NCSX Neutral Beam port requires sheet metal “cuffs” to retain fabric boot. Cuffs are shown welded in place Fabric boot is not shown for clarity The cuffs will be cut to required shape from flat patterns developed from solid models Cuffs do not bridge electrical break Sheet Metal Cuffs

NCSX Assembly Drawing

NCSX Port Weldment

NCSX Weldment Details

NCSX Port Cover Modification

NCSX Wire Flange Machining

NCSX Lateral Support Parts

NCSX loading Model fixed at vacuum vessel flange Standard earth gravity applied 6000 lb applied normal to lateral support bracket

Stress Intensity (Tresca) NCSX

Deformation NCSX

Typical heat tape and thermocouple installation philosophy covers NB port as well. Heater routing is detailed as part of heater assy drawings. NCSX Drawing for Large Diameter Ports

Wire seal flanges from MDC may not meet permeability requirements - VV conflats had to be replace with Trinos 316LN flanges - special order on these flanges could be price and schedule problem - need to verify permeability and/or determine compromise maximum value acceptable before purchase NCSX Concerns

NCSX Chit Resolution CHIT 1Man access port design basis analyses and interfaces (e.g. w/cryostat) are incomplete. [Reiersen] Analyses are complete. ICDs will be updated under another broader review 4Check on requirements on location for insulating breaks in personnel access part and pumping duct. [Reiersen] Port does not have break but pumps may at their isolation valves. Not part of WBS12 5Verify that budget and schedule activities for personnel access port is in the project baseline. [Reiersen] Budget and schedule covers the port with 54K$, under There is additional budget at pppl for lateral support fab. 23Need to coordinate with the Cryostat folks and make sure they can interface with the Man Port. Also work with the pumping duct folks to verify this meets pumping interfaces. [M. Cole] Duct size was pre-approved by WBS2 before design. WBS6 approved provided port flange extends past Cryostat wall, which it does. 28Determine whether the man access port will be used for pumping prior to procurement of all three covers blankoff cover. A. Yes it will. 2 blanks and 1 with a hole. [B. Nelson]

NCSX Conclusion There is documentation work remaining but nothing that will hold up procurement. The review charges have been met. A reduced cost port has been designed which can provide interface for pumping and/or man access into the VV It will interface a boot for the cryostat It is designed to be compatible with 350 C bakeout so it can bridge across MIE operation into future upgrades It provides mounting provisions for the lateral supports without change in their design Compatible with MC insulation seal concept No changes in I&C or Heater tapes