BAC

Question 1

The purpose of the Boric Acid Reclamation sub-system is…

Answer 1

…to store and process, for re-use and/or for volume reduction, relatively clean borated water from various plant sources.

Question 2

The only portions of the system requiring heat tracing to preclude boric acid precipitation are…

Answer 2

The boric acid batching tank and refueling water tank concentrator (BAC) concentrate discharge line to the solid radwaste system.

Question 3

A BAC steam vapor release to __(1)__ and requires a __(2)__ due to __(3)__

Answer 3

(1) the plant vent
(2) a Radioactive Effluents Discharge Permit
(3) Steam vapor contains tritium as part of the water molecule

Question 4

When in the normal position, either of the following signals will stop the holdup pump:

Answer 4

 Lo-lo holdup tank level (28”)
 High boric acid concentrator flash tank level.
 Other holdup tank pump starts.
 Diversion of letdown flow CH-500 to the pre-holdup ion exchanger when the holdup tank contents are being re-purified (CH-V686 open).
 Electrical protection or loss of control power.

Question 5

The BAC HUT alarm set points are…

Answer 5

hi-hi level alarm at 42’
high level alarm at 17’
low level alarm at 4’
low-low level alarm at 28” (HUT pump trip)

Question 6

The BAC CONC TRBL alarms in the control room…

Answer 6

…with no time delay.