d20 scrams, alarms, interlocks

DT-1

Alarm: high temp reflector outlet (55C)

DT-3

Alarm: High temp d20 cleanup (50C)

GT-3

Alarm: abnormal recombiner temp (<50C >120C)

DL-2

interlock: secures dm-2 at 2.5” level in dump tank

DL-6

Scram: Low level reflector tank (4” below overflow)

TS: 4” below overflow

DL-9

Alarm: No overflow reflector tank

Interlock: Withdraw permit circuit operator takes ctrl

DL-10

Alarm: low level dump tank (2” below startup)

GL-1

Alarm: Low level D20 gasholder (8 cu ft)

High Level d20 gasholder (60 cu ft)

DF-1

Scram: Low flow D20 (90 gpm)
TS: Reflector Flow (75 gpm)

DF-2

Alarm: Low Flow Transfer pump (1.5 gpm operator takes manual ctrl)

GPS-1

Alarm: Low Pressure D20 He System (0.4” H20)

GPS-2

Alarm: High Pressure D20 He system (2.5” H20)

GPS-3

Alarm: Low flow recombiner (1.5 cfm)

DC-1

Alarm: High Specific Conductance D20 (1 microS/cm>startup level)

DC-2

Alarm: High Specific Conductance D20 (1 microS/cm>startup level)

DV-4

Interlock: Minor Scram and secures DM-2

TS: dump reactivity worth>reactivity worth of most reactive shim blade + reg rod