PCS(1) - Passive Containment Cooling

Simplified Diagram

3.6.6 PCS

Applicability

<1hr Action(s)

MODES 1, 2, 3, and 4

MODES 5 and 6 with core decay >7.0MWth

3.6.6 PCS

SR

Temperature?

Volume?

Volume: 756,700 gallons equivalent to approximately 52.5% NR

3.6.6 PCS

Bases

ONE flow path is enough to meet design bases

PCCWST relationship with FPS

Primary source for Nuclear Island Auxiliary Building

Provides 18,000 gallons (2hrs deluge +2 hoses 75gpm)
Limited to protect IDS rooms

*18,000 gallons is IDS limit, but based on PCCAWST backup total AVAILABLE volume is 36,000 (18,000 in each tank)

PCS

Outlet AOVs

(PCS-V001A/B)

PCS

Outlet MOVs

(PCS-V001C and PCS-V002A/B)

PCS
Drains

2 Safety related, North and South side to WWS
Safety aspect: elevated to prevent debris blockage

15 additional non-safety drains

T3.6.1 PCCWST and SFP Makeup - Long Term Shutdown

PCCAWST TRS Requirements

Volume?

Transfer Flow?

>885,000 gallons (96%)

>100gpm

*Low-2 at 9% equivalent to 2hrs remaining to SFS/Ctmt