Digital_Imaging_Site_Visit_Questions.pdf

Solicitation# W9124R‐17‐T‐0024 ‐ Real Time Digital Radiography Imaging System

RESPONSE TO INDUSTRY QUERIES

Q1. What is the maximum safe operating height of the 450 tube and the linatron?

A1. The range of travel for the 450kV tube head is 20” to 60” from floor height. The associated 160kV tube head is 20” above the 450. LINAC normal 45‐1/2" beam height. LINAC maximum 55" beam height.

Note – the LINAC lift table and BigJoe tube stand (see SOW Figs 3, 4) are manually operated. The Big Joe stand is not suitable for remote operations (if the vendor intends) as it must be manually locked in place and results in tube movement when translating. The LINAC lift table may not be similarly hindered – the table is of a different design – Autoquip 34SL40.

Q2. What material handling capabilities do you have?

A2. Current configuration of the vault allows for forklift or pallet‐jack operations.

Q3. Do you plan on any scatter control mitigation for CR/film?

A3. Preferred option is for any additional equipment to be removable from the primary beam path with a minimum of difficulty (Possibly rolled to the side on rails – LINAC beam is collimated ‐ reducing shielding requirements when equipment is removed from the direct beam path). Our normal operations with DX, CR, and/or film require a clear source‐to‐film axis to 20 degrees from axis (40 degrees total clearance) and 36” beyond the film stand. Reference C.4.3 – “A transportable stand to support the detector and provide additional shielding“.

Q4. Will you be using the turn table on horizontal rotary stage to place samples on for CR/Film shots?

A4. This functionality is preferred, but as written there is no requirement specified in the SOW to integrate film/CR with the rotary stage. The manipulator shall be usable as a stand‐alone device.

Q5. Y‐Axis travel, 48” in travel, is that from the base of the detector, centerline of detector or top of imaging are?

A5. Sufficient Y‐axis translation shall allow for a minimum 48‐inch tall test item to be inspected tip (at center of detector) to tail (at center of detector). The “tail” of the test item will be placed on the T‐axis turntable (reference C.4.6), prior to “tip to tail” verification described above. Also required (reference C.4.6): The manipulator shall stow itself into the pit in a manner that it does not interfere with operations which do not utilize it such as use of a hydraulic lift table in conjunction with the DDA. This will likely require additional Y‐axis travel in addition to the minimum required for the to “tip to tail” verification described above (depending on manipulator design).

Q6. In C4.6 last bullet. Stow of manipulator. Is the intent to Stow the manipulator and the detector or use the detector without the manipulator?

A6. Detector use independent of the CT Manipulator is a requirement. Reference SOW: C.4.6: The manipulator shall stow itself into the pit in a manner that it does not interfere with operations which do not utilize it such as use of a hydraulic lift table in conjunction with the DDA. C.3: The test the article(s) are placed in front of the panel detection area either on a table (DR) or manipulator (DR or Real‐Time).

Q7. During the walk through, I noticed a I beam support structure just under the grating covering the pit.

Do we need to work around this structure or will it be removed with the old manipulator?

A7. The structure supports the grating and will remain in place. References to “steel grate” in the SOW include the support structure. Modifications exceeding the “minor” or “minimum needed” thresholds described the SOW include those which would result in reduced allowable loads on the grate and support structure, or modifications to the pit and anchoring.

Reference C.4.6: Modifications to the steel grate covering the pit should be kept to the minimum needed. The vendor is responsible for obtaining and the accuracy of measurements of the existing pit and x‐ray bay configuration. Coordination, agreement to, and buyoff of modifications are required prior to design acceptance by YPG personnel. Minor modifications to the grate shall be performed and funded by YPG based on drawings provided by the vendor at design acceptance. References to “steel grate” in the SOW include the support structure.

Q8. How deep is the pit?

A8. From the pit floor to the vault floor level is approximately 70”. The grating is 1‐3/4” thick. The vendor is responsible for obtaining and the accuracy of measurements of the existing pit and x‐ray bay configuration. See APPENDIX A.

Q9. In C4.5 Reconstruction requirements require the ability to reconstruct objects larger than the detector. Can you elaborate on that (i.e. off axis scanning allows you to place a part or component so that the center of rotation is at the edge of the DDA and scan parts effectively twice the diameter of the of the DDA).?

A9. Mosiac stitching of separate images is a requirement.

Q10. Do you require a motorized X axis for the “T‐Axis” rotary stage ?

A10. I do not understand the question. Can you please rephrase or include supporting figure to reference?

Q10. [Follow on clarification] If I am interpreting the requirements correctly there is no requirement for an axis of movement (right to left if facing the detector) for the rotary stage used to inspect bombs and mortars. If you want to take advantage of advanced CT capability's like off axis scanning you need to be able to move the center of the rotary stage from the middle of the detector to the right or left edge of the detector (this would effectively allow you to scan a part that is twice as wide as the detector).

Repositioning the rotary stage can be done with a manual axis, but it is easier to do it with a motorized axis. I can also envision this being useful when performing real time imaging.

A10. [Response to clarification] Intent is for the rotary table (T) to translate in X, Y, Z axis. Reference C.4.6:

The CT manipulator shall be controllable in 5 axes refer to Figure 6.

Figure 6: Axes of Motion

X-axis translation shall control the horizontal distance between the Y-axis and the center of the fixed detector.

Y-axis translation shall control the vertical distance between the X-axis and the center of the fixed detector.

Z-axis translation shall control the distance between the manipulator and the fixed detector for purpose of adjusting geometric magnification.

T-axis rotation shall control the rotation about the Y-axis of a test item placed into the manipulator.

Q11. IN paragraph C4.5 CT software, there is a requirement for metrology measurement tools. Can you expand on exactly what metrology tools you are looking for. 3D metrology has become very wide spread and there is several levels of tools and complexity. They range from basic tools to very complex fully automated tools.

A11. Tools will be used for precise measurements of internal features for the purpose of modeling and reverse engineering. This will include obtaining calibrated measurements in linear, area, and angle, in imperial units, with the ability to compensate for geometric enlargement. Automatic Defect Recognition

(ADR) is not a requirement.

Q12. Can we get photos and dimensions of the "pit" to better understand design constraints for the specified manipulator?

A12. See APPENDIX A.

Q13. Can you offer conduit cable lengths to be expected for machining wiring and power/data connections back to the control room? *This is especially critical info for the digital detector and its data / computer cable connections.

A13. From the manipulator pit to the control room:

i. There’s a wire conduit 8” diameter, 60”L from the wall in the pit to the ‘chimney’

ii. chimney is 19”L with an opening 6” below floor level

iii. wall is 30” thick to the technician’s waiting room

iv. 36” more will get to the next wall and its three 2‐1/2” diameter conduits

v. these will go 106” to the ceiling and through the floor between floors

vi. another 24” will get to the back wall of the control room

vii. control room wall is 228”L which is where your station will ultimately be placed so, 60+20+30+36+106+24+228= 504” a minimum of 42 feet of control runs. The vendor is responsible for obtaining and the accuracy of measurements of the existing facility.

See APPENDIX A

Q14. Can you offer up current x‐ray technique data for representative parts to be imaged: How much is film? CR? DR? RTR?

A14. Currently: Film <5%, CR 40%, DR 55%. RTR / CT will be an expansion of our capabilities. LINAC for most large caliber munitions. Tube sources for most smaller caliber items, rockets, and fuzes.

Q15. For RTR mode, how much space is required for video recording/archiving?

A15. Reference C.4.6: The CT Upgrade shall be delivered with a separate CT reconstruction and data analysis workstation… Minimum of two 4TB SATA 7200 RPM HDD or better [each workstation] Configured for data redundancy to prevent loss of archived CT data in the event of a drive failure (e.g., RAID 1)… 8x or better DVD+/‐RW Drive… Network Interface.

Q16. What "lift assist" support is inside the vault today (for maintenance, movement of detector / shielding components, etc.)? If none, should we included some level of jib crane support as part of scope of supply?

A16. There is room for floor‐use equipment. Currently forklift and pallet jack are used. Additional infrastructure is outside the scope of this action.

Q17. For protection of DDA during film/CR imaging, would it be acceptable to "move" the detector / stand via casters / wheels out of the beam path, or must the detector/stand stay fixed and have a shield door for protection?

A17. See response to Q3. It would be ‘desirable’ to have mobility for the above‐floor / above‐grating equipment. This facility is not converting to solely the new imaging equipment. Our mission requires the lift table and film stand in many inspections.

Q18. What is the expected timeframe for award decision: Is this solicitation being funded by 2017 budget $$$ that need to be spent in 2017?

A18. Award is expected FY17

Q19. What is the desired delivery date for equipment at YPG?

A19. Reference C.5: Delivery of completed design drawings within 45 days after acceptance of contract.

Delivery and on site system installation and calibration: the system shall be installed and calibrated within 180 days after acceptance of final system design. Scheduling the installation will require coordination with YPG to minimize impact to the mission.

APPENDIX A

Existing Manipulator Pit Supplemental Information

FOR REFERENCE ONLY

The vendor is responsible for obtaining and the accuracy of measurements of the existing facility.

Access to pit

NOT TO SCALE

i i ii ii iii iv v