The solver's health through every scenario, both units, at 1000x for 45 s of wall time each (tools/health.mjs, 2026-09-08, the fourth round: the library's 7e95ec0, the isolated feed valve shut, every vessel walled, both pumps in their cans). unconv = steps that did not converge, adrift = mass booked by those steps, bounds and trapped = the junction at a pressure bound or holding its pressure with no open edge, and the vessels' levels in metres.

== normal  t=0s  A: NORMAL lvl100% T346C dmg0%  B: NORMAL lvl100% T346C dmg0%
   A steps 1898 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 8 conv true ab - shut vent iso 0 fv 0.389 bounds {"cpump_j":1} trapped 2 {"cpump_j":2} new 4 sub wanted 120 capped 1898 | lvl {"rpv":14.8,"sg":25.81,"cond":1.8,"pool":null,"tank":3.8,"sump":0} | flow {"hot":17778,"steam":1892,"feed":1892,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":53025}
   B steps 1898 unconv 2 bound 1 itMax 121 adrift 0 kg | last it 8 conv true ab - shut vent iso 0 fv 0.389 bounds {"cpump_j":1} trapped 2 {"cpump_j":2} new 4 sub wanted 120 capped 1898 | lvl {"rpv":14.8,"sg":25.81,"cond":1.8,"pool":25.86,"tank":null,"sump":0} | flow {"hot":17778,"steam":1892,"feed":1892,"prhr":0,"grav":0,"inj":null,"vent":0,"fill":0,"cw":53025}
== tsunami  t=35659s  A: FUEL UNCOVERED lvl37% T756C dmg0%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1684 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 1 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1} trapped 1541 {"cpump_j":1541} new 9 sub wanted 120 capped 146 | lvl {"rpv":7.8,"sg":22.44,"cond":1.66,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":-27}
   B steps 1684 unconv 4 bound 1 itMax 122 adrift 0 kg | last it 8 conv true ab - shut cond_suct iso 1 fv 0 bounds {"cpump_j":1} trapped 1541 {"cpump_j":1541} new 9 sub wanted 120 capped 675 | lvl {"rpv":14.8,"sg":25.88,"cond":1.66,"pool":23.88,"tank":null,"sump":0} | flow {"hot":-134,"steam":0,"feed":0,"prhr":-18,"grav":1,"inj":null,"vent":0,"fill":1,"cw":25}
== sbo  t=45026s  A: FUEL UNCOVERED lvl59% T523C dmg0%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1991 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 2 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1} trapped 1919 {"cpump_j":1919} new 9 sub wanted 122 capped 78 | lvl {"rpv":10.29,"sg":18.29,"cond":1.68,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":60}
   B steps 1991 unconv 3 bound 1 itMax 121 adrift 0 kg | last it 40 conv true ab - shut cond_suct iso 1 fv 0 bounds {"cpump_j":1} trapped 1923 {"cpump_j":1923} new 9 sub wanted 122 capped 1106 | lvl {"rpv":14.8,"sg":25.85,"cond":1.68,"pool":22.28,"tank":null,"sump":0} | flow {"hot":-114,"steam":0,"feed":0,"prhr":0,"grav":0,"inj":null,"vent":0,"fill":0,"cw":-7}
== loca  t=27498s  A: VESSEL BREACH lvl0% T2841C dmg100%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1156 unconv 2 bound 2 itMax 112 adrift 0 kg | last it 1 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1,"eccs_j":1} trapped 1087 {"cpump_j":1087} new 9 sub wanted 120 capped 168 | lvl {"rpv":3.6,"sg":25.86,"cond":1.67,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":8,"fill":null,"cw":24}
   B steps 1156 unconv 4 bound 38 itMax 121 adrift 0 kg | last it 8 conv true ab - shut gravity iso 0 fv 0.086 bounds {"cpump_j":1,"tee":37} trapped 2 {"cpump_j":2} new 4 sub wanted 123 capped 1156 | lvl {"rpv":14.8,"sg":25.88,"cond":1.8,"pool":22.28,"tank":null,"sump":0} | flow {"hot":-109,"steam":660,"feed":660,"prhr":0,"grav":0,"inj":null,"vent":0,"fill":0,"cw":53026}
== tmi  t=34291s  A: VESSEL BREACH lvl0% T2767C dmg100%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1457 unconv 3 bound 2 itMax 116 adrift 0 kg | last it 4 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1,"eccs_j":1} trapped 1378 {"cpump_j":1378} new 9 sub wanted 120 capped 249 | lvl {"rpv":3.6,"sg":25.85,"cond":1.68,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":32}
   B steps 1457 unconv 2 bound 70 itMax 121 adrift 0 kg | last it 8 conv true ab - shut gravity iso 0 fv 0.086 bounds {"cpump_j":1,"tee":69} trapped 2 {"cpump_j":2} new 4 sub wanted 126 capped 1457 | lvl {"rpv":14.8,"sg":25.88,"cond":1.8,"pool":22.28,"tank":null,"sump":0} | flow {"hot":-105,"steam":660,"feed":660,"prhr":0,"grav":0,"inj":null,"vent":0,"fill":0,"cw":53026}
== chernobyl  t=33439s  A: CORE DESTROYED lvl38% T2927C dmg100%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1331 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 8 conv true ab - shut hot iso 0 fv 0.389 bounds {"cpump_j":1} trapped 2 {"cpump_j":2} new 4 sub wanted 124 capped 1331 | lvl {"rpv":7.96,"sg":25.81,"cond":1.8,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":1892,"feed":1892,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":53025}
   B steps 1331 unconv 3 bound 2 itMax 121 adrift 0 kg | last it 8 conv true ab - shut vent iso 0 fv 0.086 bounds {"cpump_j":2} trapped 3 {"cpump_j":3} new 10 sub wanted 124 capped 1331 | lvl {"rpv":14.8,"sg":25.88,"cond":1.8,"pool":25.86,"tank":null,"sump":0} | flow {"hot":10085,"steam":660,"feed":660,"prhr":53,"grav":0,"inj":null,"vent":0,"fill":0,"cw":53026}
== uhs  t=45016s  A: ULTIMATE HEAT SINK LOST lvl100% T346C dmg0%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 2243 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 1 conv true ab - shut cond_suct iso 1 fv 0 bounds {"cpump_j":1} trapped 2168 {"cpump_j":2167,"fcv_j":1} new 9 sub wanted 120 capped 81 | lvl {"rpv":14.8,"sg":15.56,"cond":1.68,"pool":null,"tank":3.8,"sump":0} | flow {"hot":552,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":52,"fill":null,"cw":14}
   B steps 2243 unconv 2 bound 1 itMax 121 adrift 0 kg | last it 4 conv true ab - shut cond_suct iso 1 fv 0 bounds {"cpump_j":1} trapped 2168 {"cpump_j":2168} new 9 sub wanted 120 capped 81 | lvl {"rpv":14.8,"sg":24.12,"cond":1.68,"pool":25.81,"tank":null,"sump":0} | flow {"hot":10084,"steam":0,"feed":0,"prhr":2,"grav":0,"inj":null,"vent":0,"fill":0,"cw":8}
== quake  t=44552s  A: FUEL UNCOVERED lvl68% T457C dmg0%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 2061 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 2 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1} trapped 1970 {"cpump_j":1969,"fcv_j":1} new 9 sub wanted 120 capped 96 | lvl {"rpv":11.27,"sg":18.91,"cond":1.67,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":16}
   B steps 2061 unconv 3 bound 1 itMax 121 adrift 0 kg | last it 8 conv true ab - shut vent iso 0 fv 0.086 bounds {"cpump_j":1} trapped 2 {"cpump_j":2} new 4 sub wanted 120 capped 2061 | lvl {"rpv":14.8,"sg":25.88,"cond":1.8,"pool":23.78,"tank":null,"sump":0} | flow {"hot":10084,"steam":660,"feed":660,"prhr":11,"grav":0,"inj":null,"vent":0,"fill":0,"cw":53026}
== fire  t=34194s  A: VESSEL BREACH lvl0% T2752C dmg100%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1491 unconv 2 bound 1 itMax 112 adrift 0 kg | last it 1 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1} trapped 1420 {"cpump_j":1418,"fcv_j":2} new 9 sub wanted 120 capped 77 | lvl {"rpv":3.6,"sg":22.09,"cond":1.68,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":8,"fill":null,"cw":-29}
   B steps 1491 unconv 2 bound 1 itMax 121 adrift 0 kg | last it 8 conv true ab - shut vent iso 0 fv 0.086 bounds {"cpump_j":1} trapped 2 {"cpump_j":2} new 4 sub wanted 120 capped 1491 | lvl {"rpv":14.8,"sg":25.88,"cond":1.8,"pool":25.86,"tank":null,"sump":0} | flow {"hot":10084,"steam":660,"feed":660,"prhr":19,"grav":0,"inj":null,"vent":0,"fill":0,"cw":53026}
== total  t=29086s  A: VESSEL BREACH lvl0% T2794C dmg100%  B: SAFE - PASSIVE COOLING lvl100% T346C dmg0%
   A steps 1416 unconv 2 bound 2 itMax 112 adrift 0 kg | last it 6 conv true ab - shut hot iso 1 fv 0 bounds {"cpump_j":1,"disch_j":1} trapped 1345 {"cpump_j":1345} new 9 sub wanted 120 capped 77 | lvl {"rpv":3.6,"sg":21.44,"cond":1.68,"pool":null,"tank":3.8,"sump":0} | flow {"hot":0,"steam":0,"feed":0,"prhr":null,"grav":null,"inj":0,"vent":0,"fill":null,"cw":-2}
   B steps 1416 unconv 8 bound 1 itMax 121 adrift 0 kg | last it 24 conv true ab - shut cond_suct iso 1 fv 0 bounds {"cpump_j":1} trapped 1345 {"cpump_j":1345} new 9 sub wanted 120 capped 1210 | lvl {"rpv":14.8,"sg":25.85,"cond":1.68,"pool":22.1,"tank":null,"sump":0} | flow {"hot":-106,"steam":0,"feed":0,"prhr":0,"grav":0,"inj":null,"vent":0,"fill":0,"cw":3}