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Message ID: 110     Entry time: Friday, February 23, 2018, 15:44
Author: Jason Kapalka 
Category: Elevation Jack 
Type: Repair 
Subject: Replacement of Elevating System wiring 
On January 8, 2018, while troubleshooting the Cyclotron Elevating System during the lid-up operation, the
insulation on the three motor drive wires were repaired (w/ electrical tape) and the two motor brake wires were
replaced (w/ crimped butt splices) between the horizontal conduit below the Cyclotron and the terminal block on
the Station #9 motor. The wiring was severely damaged over an 18" long interval that crosses the mid-plane of
the Cyclotron; outside of the 18" damage zone, the wiring insulation was ductile and showed no signs of cracking
or embrittlement.

On February 22, 2018, after the in-tank work was completed and the lid was lowered, the wiring for the synchro
and bump switch on Station #9 was pulled for inspection, which revealed that the insulation on the five synchro
wires had almost completely disintegrated, and the insulation on the six bump switch wires appeared to had
melted together to form a single wire over the typical 18" interval that roughly corresponds to the gap between
the Cyclotron resonators.

On February 23, 2018, the three motor drive wires on Station #9 were pulled and replaced, using crimped butt
splices to the existing wiring in the horizontal conduit below the Cyclotron, as the electrical tape repair job
during the lid-up operation was only a temporary fix. Also, the motor drive, motor brake, synchro, and bump switch
wires on Station #3 were inspected and replaced due to insulation damage.

On February 27, 2018, the synchro and bump switch wires on Station #5 were inspected and replaced due to insulation
damage. The motor brake and drive wires were inspected and re-connected as the insulation showed no signs of damage.
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