3.5 EMERGENCY CORE COOLING SYSTEMS (ECCS) AND REACTOR CORE ISOLATION COOLING (RCIC) SYSTEM

Question 1

What is the LCO and APPLICABILITY for Technical Specification 3.5.1, ECCS-Operating?

Answer 1

LCO: Each ECCS injection/spray subsystem and the Automatic Depressurization System (ADS) function of eight safety/relief valves shall be OPERABLE.

APPLICABILITY:
MODE 1
MODES 2 and 3, except ADS valves are not required to be OPERABLE with reactor steam dome pressure less than or equal to 150 psig.

Question 2

What are the one hour, or less, actions associated with Technical Specification 3.5.1, ECCS-Operating?

Answer 2

Condition B: High Pressure Core Spray (HPCS) System Inoperable - Verify by administrative means RCIC System is OPERABLE when RCIC is required to be OPERABLE - 1 hour

Condition H:
HPCS and Low Pressure Core Spray Systems Inoperable
OR
Three or more ECCS Injection/spray subsystems Inoperable
OR
HPCS System and one or more ADS valves Inoperable
OR
Two or more ECCS injection/spray subsystems and one or more ADS valves inoperable

• ENTER LCO 3.0.3 Immediately

Question 3

What is the LCO and APPLICABILITY of Technical Specification 3.5.2, ECCS-Shutdown?

Answer 3

LCO: Two ECCS injection/spray subsystems shall be Operable

APPLICABILITY:
MODE 4
MODE 5 except with the reactor vessel head and steam dryer storage/reactor well gate removed and water level greater than or equal to 22 ft 9 inches over the top of the reactor pressure vessel flange.

Question 4

What are the one hour, or less, actions associated with Technical Specification 3.5.2, ECCS-Shutdown?

Answer 4

Condition C: Two required ECCS injection/spray subsystems inoperable - Initiate action to suspend OPDRVS - Immediately AND Restore one ECCS injection/spray subsystem to OPERABLE status - 4 hours

Question 5

What is the LCO and APPLICABILITY of Technical Specification 3.5.3, RCIC System?

Answer 5

LCO: The RCIC System shall be OPERABLE

APPLICABILITY:
MODE 1
MODES 2 and 3 with reactor steam dome pressure >150 psig

Question 6

What are the one hour, or less, actions associated with Technical Specification 3.5.3, RCIC System?

Answer 6

Condition A: RCIC System inoperable - Verify by administrative means High Pressure Core Spray System is OPERABLE - 1 hour