Integration Engineering
Chapter 8 Reviews
The integration office and technical coordination review all stages of detector development and work with each consortium to arrange reviews of the design (conceptual design review, preliminary design review and final design review), production (production readiness review and production progress review), installation (installation readiness review), and operation (operational readiness review) of their system. The reviews are organized by the Joint Project Office (JPO) review office.
In parallel, the review office reviews all stages of Long-Baseline Neutrino Facility (LBNF) cryostat and cryogenics development. These reviews provide information to the technical board (TB), executive board (EB), and Experimental Facilities Interface Group (EFIG) in evaluating technical decisions. A timeline for the review process is shown in Figure 8.1.
Figure 8.1: Deep Underground Neutrino Experiment (DUNE) review process and timeline Review reports are tracked by the JPO review office and technical coordination and provide guid- ance on key issues that require engineering oversight by the JPO engineering team. The review office maintains a calendar of DUNE reviews. The calendar of reviews is developed by the review office in consultation with the project integration director, technical coordinator (TC), LBNF project manager, consortia leads, and LBNF subsystem managers.
Chapter 8: Reviews 8–88
Technical coordination works with consortia leaders to prepare for reviews of all detector designs.
As part of the technical design report (TDR) development preliminary design reviews were arranged for many subsystems in advance of the TDR. Some remaining subsystem preliminary design reviews will occur after the TDR. All subsystems will undergo final design reviews. All major technology decisions will be reviewed before down-select. Technical coordination may form task forces as needed to address specific issues that require more in depth review.
Technical coordination works with consortia leaders to prepare for review of detector component production processes. Production of detector elements begins only after successful production readiness reviews. Regular production progress reviews will be held once production starts de- pending on the length of the production process. The production readiness reviews will typically include a review of the production ofModule 0, the first module produced at the facility. Technical coordination will work with consortia leaders on all production reviews.
The integration office works with consortium leaders to prepare for reviews of detector installation processes and later of the installed detector components to ensure that they are ready for oper- ations. Technical coordination coordinates technical documents for the Long-Baseline Neutrino Committee (LBNC) TDR review.
The review process is an important part of the DUNE quality assurance (QA) process, as described in Section 9.7.2, for design and production.
The review process has been in place since 2016 with various reviews of ProtoDUNE components and has continued into the first DUNE reviews in 2018–19. Past and scheduled reviews are in the DUNE Indico at https://indico.fnal.gov/category/586. Review reports are currently maintained in DocDB 1584 [6].
8.1 Design Reviews
The DUNE design review process is described in DocDB 9564 [7]. An updated mandate for the review office is under development at [8]. Design reviews for ProtoDUNE were held for each major system. Because the schedule was extremely tight for ProtoDUNE, only a single design review was held for each major system. Similarly, a single production readiness review was held for each major system.
The successful operation of ProtoDUNE means DUNE is at a very advanced state of design. The strategy going forward has been to hold conceptual design reviews for systems with significant changes from ProtoDUNE, including the detector support system (DSS), photon detection system (PD system), data acquisition (DAQ), and calibration. These are systems that require changes due either to the size difference between ProtoDUNE and DUNE or the fact that the former is in a test beam and the latter is underground. All systems will go through preliminary design reviews to review design changes from ProtoDUNE and final design reviews after the TDR.
Technical coordination has established an engineering safety committee with mechanical and elec-
Chapter 8: Reviews 8–89
trical engineering experts from collaborating institutions to develop processes and procedures to evaluate engineering designs using accepted international safety standards. The current status of international code equivalencies is discussed further in Section 10.3. The codes and standards to which each system is designed will be reviewed as part of the preliminary design review and final design review.
8.2 Production Reviews
Once the designs are finished, production reviews will be held before significant funds are autho- rized for large production runs. These reviews are closely coordinated with the QA team. The expectation is that a Module 0 be produced and presented as part of the production readiness review. The Module 0 is the first article from the production line and provides a useful indication of the validity of production processes, time estimates, and quality of the product.
Once production has started, the review office will schedule production progress reviews as appro- priate to monitor production schedule and quality. These reviews will consist of site visits and will include membership from the environment, safety and health (ES&H) and QA teams.
The production readiness review process was exercized during ProtoDUNE-SP construction. Be- cause the schedule was extremely tight for ProtoDUNE, only a single production readiness review was held for each major system, and no production progress reviews were held.
8.3 Installation Reviews
Installation readiness reviews are planned to verify that equipment and procedures are in place prior to installation of detector components. These will review quality control (QC) results to verify that as-built detector components can be successfully installed and operated. A critical part of these reviews is to establish and verify the hazard analysis (HA) for the installation activities and mitigate any identified safety risks. These reviews will include safety personnel from Sanford Underground Research Facility (SURF) and Fermi National Accelerator Laboratory (Fermilab) as appropriate.
8.4 Operations Reviews
The review office will conduct an operational readiness review on subsystems before they are operated. Operational readiness reviews serve as the final safety check after the equipment is installed. These reviews will include safety personnel from SURF and Fermilab, as appropriate.
Chapter 8: Reviews 8–90
8.5 Review Tracking
Tracking and controlling review recommendations is part of the review process. Review committees assess recommendations from earlier reviews. The review office assures that consortia respond to review recommendations and works with the consortia to make sure the responses are appropriately documented and implemented. Reports from DUNE reviews are maintained in DocDB 1584 [6]
along with the list of recommendations. The review office reports to the project integration director, TC, and LBNF project manager on recommendations and progress towards completing actions on these recommendations.
8.6 Lessons Learned
A detailed list of lessons learned from construction and operation of ProtoDUNE-SP is in DocDB 8255 [9]. These lessons have driven planning for DUNE and have led to design changes in DUNE.
Lessons learned will continue to be updated throughout the design review process and into pro- duction. The methodologies are described in Section 9.4.
8.7 Reporting
The DUNE project has published regular monthly reports since the final design and construction of ProtoDUNE began in earnest in summer 2016. Technical coordination currently plans to continue to compile and publish these reports. The DUNE project provides regular reports to the LBNC at reviews several times a year. The JPO review office produces reports from design, production, installation, and operations reviews.
Chapter 9: Quality Assurance 9–91