Multi-session work bundle on a draft branch. Splits into a clean
sequence of commits later; pushed here so it isn't lost on a reboot.
Reach work
- code/scripts/reach/reach_scram_pj.jl: shutdown_margin halfspace
X_exit (replaces "n <= 1e-4 AND T_f bound" framing); per-step
envelope extraction added.
- code/scripts/reach/reach_scram_pj_fat.jl: per-step envelope
extraction added; shutdown_margin discharge logic mirrored from the
tight scram script. 3 probes (10/30/60s) all discharge from the
fat union polytope.
- code/scripts/reach/reach_scram_full_fat.jl (NEW): full nonlinear
PKE scram reach with fat entry. Hits the stiffness wall at
~1.5 s plant time as expected; saves NaN-tolerant per-step
envelopes. Demonstrates concretely why PJ is the right tool for
the longer-horizon proof.
- code/scripts/reach/reach_heatup_pj.jl: T_REF_START_C constant
(entry-conditioned ramp) replaces T_STANDBY-init that was making
the FL controller command cooling at t=0. Per-step extraction
already in place.
- code/configs/heatup/tight.toml: bumped maxsteps; probe horizon
parameterized.
Hot-standby SOS barrier
- code/scripts/barrier/barrier_sos_2d_shutdown.jl (NEW): mirrors the
operation SOS machinery on the hot-standby thermal projection.
Includes the eps-slack pattern (so feasibility doesn't silently
collapse to B == 0).
- code/scripts/barrier/barrier_sos_2d.jl: refactored to use the same
helper.
- code/src/sos_barrier.jl (NEW): solve_sos_barrier_2d helper module
factoring out the SOS construction; eps-slack with eps_cap=1.0 to
avoid unbounded primal.
Library
- code/src/pke_states.jl (NEW): single source of truth for canonical
initial-condition vectors per DRC mode (op, shutdown, heatup) keyed
off plant + predicates.
- code/scripts/sim/{main_mode_sweep,validate_pj}.jl, code/CLAUDE.md:
migrated to pke_states.
Predicates + invariants
- reachability/predicates.json: new shutdown_margin predicate (1%
dk/k tech-spec floor, expressed as alpha_f*T_f + alpha_c*T_c
halfspace). Used as scram X_exit.
Plot script
- code/scripts/plot/plot_reach_tubes.jl: plot_tubes_scram_pj() with
variant=:fat|:tight knob; plot_tubes_scram_full() for full-PKE
3-panel (T_c, T_f, rho); plot_tubes_heatup_pj() reads results/
not reachability/.
Journal + memory
- journal/entries/2026-04-27-shutdown-sos-and-scram-X_exit.tex (NEW):
long-form entry on the SOS hot-standby barrier and the scram X_exit
refactor.
- journal/journal.tex: input chain updated.
- claude_memory/ — three new session notes:
* 2026-04-27-scram-X_exit-shutdown-margin.md
* 2026-04-28-DICE-2026-conference-intel.md (people, sessions,
strategic notes for the May 12 talk)
* 2026-04-28-path1-sos-pj-sketch.md (sketch of nonlinear-SOS via
polynomial multiply-through; saved for an overnight session)
Docs
- docs/model_cheatsheet.md (NEW): one-page reference of state vector,
dynamics, constants, modes, predicates, sanity numbers — the talk
prep cheatsheet Dane asked for.
- docs/figures/reach_*_tubes.png: regenerated with the new mat data.
- presentations/prelim-presentation/outline.md: revised arc per the
April-28 review pass (cuts: Lyapunov-fails standalone slide,
operation-tube standalone slide, SOS standalone; adds: scopes-of-
control framing, scram on the headline result slide).
- app/predicate_explorer.jl: minor.
Hacker-Split: end-of-session scratch bundle
269 lines
16 KiB
Markdown
269 lines
16 KiB
Markdown
# 2026-04-28 — DICE 2026 conference intel (Salt Lake City, May 12-13)
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Networking + strategy notes for the 2026 Digital Engineering Conference,
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hosted by INL + University of Utah + Utah Office of Energy Development at
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S.J. Quinney College of Law, U Utah.
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## Dane's slot
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**Tuesday May 12, 3:30 PM — Breakout Session 10** (afternoon, 2:30–4:30).
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Talk title: *"Leveraging Formal Methods to Build High Assurance Hybrid
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Autonomous Control Systems for Nuclear Power"*. 4th of 6 talks in BS10.
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20-minute slot.
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BS10 theme is **risk + assurance**, not tools. Defense-in-depth framing
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(slide 11) lands well here.
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## BS10 walkthrough (Dane's session)
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| Time | Speaker | Talk | What to know |
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|---|---|---|---|
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| 2:30 | **Olivia Beck** | Metadata Standards for Nuclear Deterrence Test Data | Data-layer / nonproliferation; orthogonal to Dane's work. |
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| 2:50 | **Robert Hayes** | DE of Agility and Risk in Complex SoS | NCSU Associate Professor of Nuclear Engineering. Background is radiation physics, health physics, nonproliferation, dosimetry — *not* his published wheelhouse for SoS/digital engineering. The DICE talk represents a stretch from his usual research; either he's broadening or the topic is a cover for radiation-context work. **Likely Q&A from him: "how does this scale to system-of-systems?"** Have ready: per-mode reach-avoid composition; you verify locally and inherit hybrid correctness. *Possible name collision* — confirm by face on arrival; multiple Robert Hayes in the field. |
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| 3:10 | **Linyu Lin** | Predictive Maintenance Visualization | INL researcher, ML-flavored predictive-maintenance work. Orthogonal but worth a hello — INL collaborator pool. |
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| **3:30** | **Dane** | Formal Methods talk | — |
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| 3:50 | **David Borden** | Cryogenic DT for Neutrino Physics | Specialized; orthogonal. |
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| 4:10 | **Nicole Davis** | "Every Interface is a Risk" | Cyber-flavored closer. Couldn't disambiguate online (very common name). Title strongly suggests OT-cyber posture; she'll be in the same defense-in-depth headspace as Dane's slide 11. **Likely friendly Q&A; mention defense-in-depth out loud and she'll bite.** |
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## Top 3 to seek out at the Tuesday reception (4:45–6:30)
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### 1. Yue Chen — NREL (likely; common name, see caveat)
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**Working hypothesis:** Yue Chen at the National Renewable Energy
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Laboratory (Denver Metro), Ph.D. University of Florida 2012–2016. Coursework
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in optimization/optimal control, stochastic control, control of complex
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networks. Published on combining model-based + model-free methods for
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stochastic control of DERs. NREL has an active **Autonomous Energy
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Systems** thrust with Lyapunov-stability + SOS work for grid-forming
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converters — the talk title (*"Lyapunov-Based Iterative Learning of
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Regions of Attraction for Autonomous Systems"*) fits this lineage.
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**Caveat:** "Yue Chen" is extremely common in the field; couldn't 100%
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confirm this is the right Yue Chen. **Verify by face/badge on arrival.**
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LinkedIn: `linkedin.com/in/yuechen10/` for the NREL one.
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**Why seek him out:** Methodological neighbor. ROA learning is the
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ML-flavored cousin of Dane's SOS-barrier path. **Conversation opener:**
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*"I'm doing SOS polynomial barriers on a similar problem — what's the
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trade-off in your experience between certified-but-rigid (SOS) and
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learned-but-soft (iterative ROA)?"* Lets him show his work, opens
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collab door.
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**If he's at the methodology end (a real stability theorist):** a possible
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collaborator on path 1 (PJ-SOS). Worth a follow-up email after the
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conference.
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### 2. Diego Mandelli — Idaho National Laboratory
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**Confirmed.** R&D Engineer at INL, Ph.D., works in **Risk Assessment
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and Management Services**. Specializes in dynamic PRA, simulation-based
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risk modeling, AI/data-mining for nuclear safety, knowledge graphs for
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nuclear plant systems. Recent (2024) work on "Technical Language Processing
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of Nuclear Power Plants Equipment Reliability Data" + the MBSE-knowledge-graph
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approach on his DICE talk.
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**Why seek him out:** **Licensing/regulatory pathway ally.** Mandelli's
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work is the data + reliability + reasoning layer that complements Dane's
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formal verification — different abstraction levels of the same
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high-assurance problem. He's INL, well-networked, knows the NRC interface.
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**Conversation opener:** *"Your KG approach gives a structured reasoning
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layer over reliability data; my work gives bounded-time safety proofs
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over the continuous plant. They're complementary — both feed the
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licensing argument from different sides. How are you seeing the NRC
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respond to formal-methods-based assurance arguments?"*
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His DICE talk: BS3 Tuesday morning at 10:25 — *"From Data to Knowledge:
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An MBSE- and Knowledge Graph-Centered AI Framework for Nuclear Reliability
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and Licensing."*
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### 3. Sean McBride — Idaho State University
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**Confirmed.** Director of the **Informatics Research Institute** at
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Idaho State University's College of Technology. Founded the ICS
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Cybersecurity Associates Degree program at ISU. Background: ex-FireEye
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(built their ICS security business strategy), pioneered DHS ICS-CERT
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threat/vulnerability intelligence, co-founded Critical Intelligence (ICS
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threat intel firm). **One of the people who actually built ICS-CERT.**
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Education-focused now; cares about workforce + students who understand
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both PLCs and physical safeguards.
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**Why seek him out:** Closest direct overlap with Dane's formal-methods-
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plus-cyber pitch. McBride represents the OT-cyber audience Dane is trying
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to reach. He's also at INL's neighbor institution — geographic and
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network proximity to Dane's likely collaborators.
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His DICE talk: BS6 Tuesday afternoon at 2:30 — *"A Hierarchical Model for
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PLC Code Quality, Safety and Cybersecurity."* Conflicts with Dane's
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slot (BS10), so reception is the moment.
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**Conversation opener:** *"Your PLC code quality work and my hybrid
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controller verification work both hit the same target — high-assurance
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control logic — from different layers. I'd love to compare notes on how
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the OT-cyber community is receiving formal-methods arguments."*
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## Tuesday morning breakout — strategic room choice
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All five rooms (BS1–BS5) run in parallel 9:45–11:45. Pick one and stay.
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Two viable plays:
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**Option A — BS1 (methodology overlap):**
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- 10:05 — **Yue Chen**, "Lyapunov-Based Iterative Learning of ROA for Autonomous Systems"
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- 10:45 — Kevin O'Rear (Everstar/Gordian), "DOE→NRC Regulatory Crosswalk via GenAI"
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- 11:05 — Sonali Roy, "AutoDONE: Agentic Framework for NPP Design"
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**Option B — BS3 (licensing pathway):**
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- 9:45 — Jieun Lee, "Remote Ops AGN-201 Reactor DT"
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- 10:25 — **Diego Mandelli**, "MBSE + KG AI for Nuclear Reliability and Licensing"
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- 11:05 — **Nicholas Luciano** (ORNL), "Digital Twins to Enable Licensing of Nuclear Innovations"
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**Recommendation: Option A.** Yue Chen is the single most valuable
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methodology contact. The licensing-pathway people (Mandelli, Luciano) will
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be at the reception and are findable socially.
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## Keynote priorities (12 keynotes; only these 4 matter for Dane)
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### Liz Muller — CEO/Co-founder, Deep Fission
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**Tuesday 8:45 morning keynote.** Co-founded Deep Fission in 2023 with her
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father Richard Muller (UC Berkeley physicist). Deep Fission deploys
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**off-the-shelf small modular pressurized water reactors a mile underground
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in boreholes** — combining standard PWR tech, deep-borehole drilling
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(oil & gas), and geothermal heat transfer. Reactor named "Gravity."
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Selected for DOE's Reactor Pilot Program; first reactor going in at
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Parsons, Kansas. Recently raised $80M.
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Previously co-founded and led Deep Isolation (nuclear waste disposal
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via deep boreholes — same tech family) and Berkeley Earth (climate-data
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nonprofit).
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**Why she matters for Dane:** PWRs in unconventional siting → unconventional
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licensing arguments → formal methods becomes more relevant, not less,
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when the regulator can't lean on operational track record. Listen for
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how she frames the regulatory ask. If she emphasizes "we use standard
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PWR tech to minimize licensing risk," that's the opening for
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formal-methods assurance arguments.
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### Yasir Arafat — CTO/Co-founder, Aalo Atomics
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**Wednesday 9:15 opening keynote.** Founded Westinghouse's eVinci
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microreactor program. Led DOE's **MARVEL project at INL** — first DOE
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reactor authorization in 30 months (very fast). Joined Aalo Atomics from
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INL. Aalo is Austin-based, building the **Aalo-1**: a 10 MWe sodium-cooled
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microreactor inspired by MARVEL, optimized for factory mass-manufacture.
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Partnered with data-center operators. Raised $100M (TechCrunch, Aug 2025).
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**Why he matters for Dane:** Formerly at INL (Dane's NRC fellowship
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network), did MARVEL (the real "MARVEL → industry" pipeline). Sodium-
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cooled fast reactor licensing is different from PWR licensing but
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equally hard — autonomous control + formal verification is more, not
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less, valuable. Arafat is the kind of technical founder who'd get
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formal methods immediately.
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### Emy Lesofski — Director, Utah Office of Energy Development
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Appointed by Gov. Spencer Cox as energy advisor and OED Director in
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late 2023/2024. Previously: U.S. Senate Committee on Appropriations
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(Subcommittee on the Interior, Environment, and Related Agencies) —
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**deep federal appropriations background**. Oversees policy, programs,
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and the Utah San Rafael Energy Lab. UOED has signed an MOU with
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TerraPower exploring siting of an advanced reactor in Utah.
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**Why she matters for Dane:** State-level energy authority + federal
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appropriations background = exactly the right node if Dane wants to
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explore state-funded research, advanced-reactor siting work, or the
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San Rafael Energy Lab's research portfolio. UOED is **Diamond sponsor**
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of DICE — she'll be visible and accessible.
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### Bryan Lopez — Senior Director, Microsoft Health & Scientific Missions
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Federal Strategic Science / Scientific Missions Senior Director, Health
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at Microsoft (Redmond). Previously: DOE Strategic Account Director at
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Microsoft. Earlier: Sandia National Labs, Nuvotech, Air Force Research
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Laboratory. UNM undergrad, U Arizona M.S. (Management Information Systems).
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**He's been the Microsoft↔DOE bridge for years.**
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**Why he matters for Dane:** Microsoft is heavy at this conference
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(3 keynote slots — Lopez, Misty Jordan, Nelli Babayan). They have
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discretionary research-engagement budget for federal scientific
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computing. Dane's NRC fellowship + formal methods work is exactly the
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profile Microsoft Federal looks at. Lopez is the contact.
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## Other potentially-useful people across the program
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- **Nicholas Luciano** (ORNL, BS3 11:05) — R&D in Advanced Engineering
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Technologies, Nuclear Nonproliferation Division. PhD in nuclear
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engineering from U Tennessee. Did neutron spectra at SNS, fast-reactor
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Pu disposition, VVER analysis. Now: digital twins for nuclear
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licensing — adjacent to Dane.
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- **Max Taylor** (BS2 11:05) — "MBSE to Intrusion Detection Systems."
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Same defense-in-depth philosophy as Dane.
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- **Prashant Kondle** (BS8 3:50) — "Clearing the Path for AI-Assisted
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Systems in Regulated Industries." XAI for regulatory acceptance — adjacent
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to formal methods as a regulatory pathway.
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## Hard-question prep (what Dane should expect)
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| Person / archetype | Likely question | Prepped answer |
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| **Yue Chen** (or any Lyapunov-ROA person) | "Why SOS over learned ROA? Soundness for adaptivity is a real trade." | Yes, the trade-off is real. Soundness is non-negotiable for NRC. We lose flexibility in exchange for proofs that compose across modes. Complementary, not competitive. |
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| **Robert Hayes** (or any SoS person) | "How does this scale to system-of-systems?" | Per-mode composition. Verify each mode locally; hybrid correctness inherited by composition. Doesn't require monolithic verification. |
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| **Diego Mandelli / SysML-MBSE crowd** | "Why FRET over SysML/MBSE?" | FRET produces machine-checkable LTL; SysML produces human-readable diagrams. Different roles — FRET is downstream of SysML, not a replacement. |
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| **Generative-AI / agentic crowd** (Vaibhav Yadav, Sonali Roy) | "Why not have an LLM do this?" | ML in the safety-critical loop is exactly what we're avoiding. Formal methods give the bounds ML lacks. We're complementary to ML safety analysis, not competitive. **Don't be defensive — the assurance argument is solid.** |
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| **OT-cyber audience** (Sean McBride, Nicole Davis) | "What's your threat model?" | Slide 11 close: formal methods constrain physical-plant behavior even given comms-layer compromise. An assurance axis comms-security alone can't reach. |
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| **Liz Muller / Yasir Arafat archetype** | "How does this help our licensing case?" | Bounded-time safety proofs over the continuous plant give you a quantitative argument for the NRC, not a qualitative one. Verified discrete controller + sound nonlinear reach = "we have proven this can't do the bad thing in this regime." |
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## Strategic positioning notes
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- **Dane is a methodological outlier.** This conference is heavy on
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AI/ML/digital-twin/agentic. His formal-methods pitch will stand out —
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opportunity (memorable) and risk (audience may not be tooled to
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evaluate it). **Don't apologize.** Lean into the assurance angle;
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the cyber-leaning subset (BS6, BS7, BS10 second half) gets it
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instantly.
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- **The regulatory-pathway crowd is the natural ally.** Mandelli,
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Luciano, O'Rear, Kondle. All asking variants of "how do we get
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advanced nuclear past the NRC?" Dane has a piece of that puzzle.
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Find them at the reception.
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- **The Microsoft-Federal triad** (Jordan, Babayan, Lopez) probably
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has discretionary budget for formal-methods-adjacent federal work.
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Worth a hello at minimum.
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- **Reception is the highest-leverage window** (Tuesday 4:45–6:30,
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catered). Wednesday is mostly fireside chats and remarks — less
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chance to corner the people Dane wants to meet.
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## Things to verify on arrival
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- **Yue Chen identity** — confirm this is the NREL one (not a different
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Yue Chen from a different institution). Look at his badge/intro.
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- **Robert Hayes** — confirm whether this is the NCSU radiation-physics
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professor (research mismatch with talk topic) or a different Robert
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Hayes. The DICE talk seems out of his published wheelhouse.
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- **Nicole Davis** — couldn't find online; she's almost certainly
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identifiable from her abstract / intro at the start of her talk
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in BS10. Decide on the spot whether to ping her after.
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## Dane's preferred breakout-session strategy (TL;DR)
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1. Tuesday morning 9:45–11:45 → **BS1** (Yue Chen).
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2. Tuesday afternoon 2:30–4:30 → **BS10** (his own session).
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3. Tuesday reception 4:45–6:30 → **find Mandelli + McBride + (Luciano if
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spotted)**, in that order.
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4. Wednesday morning → keynotes (Arafat); fireside chat is networking-only,
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doesn't really need close attention.
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5. Anytime he sees Lesofski (Diamond sponsor — she'll be visible) or
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Lopez — say hi, hand business card.
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## Sources
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- Diego Mandelli: [INL Researcher Profile](https://bios.inl.gov/Lists/Researcher/DisplayOverrideForm.aspx?ID=538), [Google Scholar](https://scholar.google.com/citations?user=78V6lbsAAAAJ&hl=en)
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- Sean McBride: [ISU Industrial Cybersecurity](https://www.isu.edu/industrialcybersecurity/meet-your-instructors/), [LinkedIn](https://www.linkedin.com/in/sean-mcbride-9705298/)
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- Nicholas Luciano: [ORNL Staff Profile](https://www.ornl.gov/staff-profile/nicholas-p-luciano)
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- Robert Hayes: [NC State Nuclear Engineering](https://ne.ncsu.edu/people/rbhayes/), [Google Scholar](https://scholar.google.com/citations?user=3Jf-ed8AAAAJ&hl=en)
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- Liz Muller: [Deep Fission Leadership](https://www.deepfission.com/about-us/executive-leadership), [LinkedIn](https://www.linkedin.com/in/elizabethmuller/)
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- Yasir Arafat: [Aalo Atomics post](https://www.aalo.com/post/yasir-arafat-of-inls-marvel-to-join-aalo-atomics-as-cto), [LinkedIn](https://www.linkedin.com/in/yasiraalo/)
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- Emy Lesofski: [Cox appointment release](https://governor.utah.gov/press/gov-spencer-cox-appoints-emy-faulkner-lesofski-as-energy-advisor-and-director-of-the-office-of-energy-development/), [LegiStorm bio](https://www.legistorm.com/person/bio/32726/Emelyn_Faulkner_Lesofski.html)
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- Bryan Lopez: [LinkedIn](https://www.linkedin.com/in/bryanlopez/), [ZoomInfo profile](https://www.zoominfo.com/p/Bryan-Lopez/16126421360)
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- Yue Chen (NREL hypothesis): [LinkedIn](https://www.linkedin.com/in/yuechen10/), [NREL Autonomous Energy Systems](https://www.nrel.gov/grid/algorithms)
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- DICE 2026 conference: [INL DICE event page](https://dice.inl.gov/event/digital-engineering-conference-2026/)
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