To drain PRT: open 2PR14 → automatically opens 2WL12 → starts RCDT pump (defeats low level cutoff). RCDT pumps can discharge to: (1) RWST, (2) CVCS Hold-Up Tanks, or (3) Waste Hold-Up Tanks.

PRT drain limitation: 2PR15 cannot open if PRT pressure is ≥10 psig.

PRT Cooling (Section 5.3): cooling is accomplished by a manual-only feed and bleed — feed via 2WR82 (Primary Water), bleed via 2PR14 (PRT drain). Operation of WR82 and PR14 can only be performed manually. During PRT cooling, the PRT is drained directly to the RCDT pump suction header (NOT into the RCDT tank itself). There is NO automatic PRT cooling function.

Section 5.3, "Reducing PRT Temperature by Feed and Bleed": PRT liquid is pumped to the HUT (Hold-Up Tank) using an RCDT Pump. The source of PRT temperature rise at power is Reactor Head Vent leakage (head vents drain to the PRT). Reactor Flange Leakoff goes to the RCDT, not the PRT. The PRT drain is physically connected to the RCDT but a check valve prevents pumping to the RCDT — PRT liquid goes to the HUT.