3.7 Plant Systems

3.7.1 Main Steam Safety Valves (MSSVs)

LCO

Applicability

Need all SIX

MODES 1, 2, 3, and 4

*Notice NOTE, not required for OPENING when on RNS

3.7.1 Main Steam Safety Valves (MSSVs)

Power limitation based on OPERABLE valves?

3.7.1 Main Steam Safety Valves (MSSVs)

Lift Settings?

Aid:

Lowest MSSV is design pressure of steam system

+12

+12

+12

+11

+0 (same lift setpoint)

*All within ±1%

3.7.2 Main Steam Line Flow Path Isolation Valves

LCO

Applicability

MSIVs, MSIVbyp, MSL drains, Stop/Control, Bypass valves, MSR 2nd

MODES 1, 2, 3, and 4

*All SR requirements are applicable to closure time and isolation

3.7.3 Main Feedwater Isolation Valves (MFIVs) and Main Feedwater Control Valves (MFCVs)

LCO

Applicability

All OPERABLE

MODES 1, 2, 3, and 4

*All SR requirements are applicable to closure time and isolation

3.7.4 Secondary Specific Activity

LCO

Applicability

I-131 ≤0.01 MCi/gm (Dose Eqv.)

MODES 1, 2, 3, and 4

3.7.5 Spent Fuel Pool Water Level

LCO

Applicability

≤1hr Action(s)

≥23 ft above TAF in racks

When fuel in pool

Whole LCO is ≤1hr: Don’t move fuel, initiate fix

*LCO 3.0.3 will NEVER help the POOL

3.7.6 Main Control Room Emergency Habitability System (VES)

LCO

Applicability

OPERABLE

MODES 1, 2, 3, 4, Moving Fuel(irregardless MODE)

3.7.6 Main Control Room Emergency Habitability System (VES)

≤1hr Action(s)

Online?

While moving Fuel?

Online: Initiate mitigating action (Duct Tape)

Fuel: Stop immediately

3.7.6 Main Control Room Emergency Habitability System (VES)

SR Requirements

Volume?

>327,574 scf (327,000-ish)

3.7.7 Startup Feedwater Isolation and Control Valves

LCO

Applicability

All OPERABLE

MODES 1, 2, 3, and 4

*All SR requirements are applicable to closure time and isolation

3.7.8 Main Steam Line Leakage

LCO

Applicability

SR Requirements

≤0.5gpm INSIDE containment

MODES 1, 2, 3, and 4

INTO the sump ≤ LCO limit

3.7.10 Steam Generator (SG) Isolation Valves

LCO

Applicability

PORVs, Blocks, Blowdown valves

MODES 1, 2, 3, and 4

*All SR requirements are applicable to closure time and isolation

3.7.11 Spent Fuel Pool Boron Concentration

LCO

Applicability

≤1hr Action(s)

≥2,300ppm

When Fuel in the Pool

*LCO 3.0.3 will never help the POOL

3.7.12 Spent Fuel Pool Storage

LCO

Applicability

≤1hr Action(s)

More burnup than enrichment per table

When Fuel in Region 2 (Normal region) of Pool

*LCO 3.0.3 will never help the POOL

3.7.12 Spent Fuel Pool Storage

Region 2 Loading Curve

*The purpose is NOT to memorize, but to be more familiar than seeing this the first time during an SRO Admin JPM

Maximum k_eff in SFP is 0.95

3.7.13 Spent Fuel Pool Cooling System (SFS) Containment Isolation Valves

LCO

Applicability

SR Requirements

OPERABLE

MODE 6 when Cavity and Pool tied

Per 3.6.3.4/5