DOS(H3) - Standby Diesel Fuel Oil

Ancillary DGs included

Simplified Diagram

Fuel Tanks

Day

Storage

Ancillary

Day: 4hrs, One per Engine

Storage: 7days (55,000gal), One per Engine

Ancillary: 4days(>600gal), One for both

Ancillary Diesels

Loads?

When implemented?

Location?

PAMs, MCR Light, PCS recirc, Ancillary support

P-72 Procedures

Annex Building but from outside near BAST

Fuel Oil Pumps

Low FOST Level Trip?

Temperature Band?

Power?

Day Tank Control Band?

FOST 27.2” (Norm >206”)

33.6-46.4F

EC-123(233)

35.1-61.4” Day Tank

Fuel Recirculation SOVs

(V070A/B)

Opens when Transfer pump running and high Day Tank level

Closes when Pump off or low Day Tank

Fails Closed

Fuel Makeup SOVs

(V071A/B)

Opens when Transfer pump running and low Day Tank level

Closes when Pump off or high Day Tank

Fails Closed