Incorrect. Straight from the Emergency Core Cooling System Tech Spec Bases:
"Although no credit is taken in the safety analyses for the condensate storage tank (CST), it is
capable of providing a source of water for HPCI and RCIC"
The suppression pool is the credited source, which it why the instrumentmation to swap the suction to the suppression pool at low CST level or high suppression pool level are the only Tech Spec required components.
Sigh. FRigging NUBS:
The ECCS pumps are provided with minimum flow bypass lines, which
discharge to the suppression pool. The valves in these lines
automatically open to prevent pump damage due to overheating when
other discharge line valves are closed. To ensure rapid delivery of water
to the RPV and to minimize water hammer effects, all ECCS pump
discharge lines are filled with water. The LPCI and CS System discharge
lines are kept full of water using a "keep fill" system (jockey pump
system). The HPCI System is normally aligned to the CST. The height of
water in the CST is sufficient to maintain the piping full of water up to the
first isolation valve. The relative height of the feedwater line connection
for HPCI is such that the water in the feedwater lines keeps the remaining
portion of the HPCI discharge line
TS Required system.