• Provides operator information in the Control Room to protect the vessel from undue thermal and mechanical stresses.
• Information used to assure the Core remains covered and the separators are not flooded.
• Redundant inputs to the Reactor Protection System to shutdown the Reactor when fuel damage limits are approached.
• Information at Panel C-292 (ASDS) in event of Control Room evacuation

Provides indication of vessel pressure and inputs to:

1. RPS, Feedwater Level Control System
2. ECCS
3. ATWS

1. Inputs to feedwater control system
2. Inputs to RPS
3. Inputs to initiate ECCS
4. Control room indication and alarms.

1. Reactor Vessel shell adjacent to shell flange
2. Rx Vessel Bottom head
3. Reactor vessel bottom drain
4. Recirc loops A and B

Section 3.3: Instrumentation

Tech Spec 3.3.1.1: RPS Instrumentation

LCO The RPS Instrumentation for each function in Table 3.3.1.1-1 shall be operable.

APPLICABILITY: According to Table 3.3.1.1-1.

Conditions requiring 1 hour or less actions:

C. Condition: One or more functions with RPS trip capability not maintained. Required Action: C.1 Restore RPS trip capability. Completion Time: 1 hour. Condition D: Required Action and associated Completion time of condition A, B, or C not met. Action D.1: Enter the Condition referenced in Table 3.3.1.1-1 for the channel. Completion time: IMMEDIATELY. Condition H: As required by Required Action D.1 and referenced in Table 3.3.1.1-1. Action H.1: Initiate action to fully insert all insertable control rods in core cells containing one or more fuel assemblies.

Section 3.3 Instrumentation

Tech Spec 3.3.6.1: Primary containment isolation Instrumentation

LCO: The primary containment isolation instrumentation for each Function in Table 3.3.6.1-1 shall be OPERABLE.

Applicability: According to Table 3.3.6.1-1.  

Condition B: One or more Functions with primary containment isolation capability not maintained. Action B.1: Restore primary containment isolation capability. Completion time: 1 hour;

Condition C: Require Action and associated Completion Time of Condition A or B not met. Action C.1: Enter the Condition referenced in Table 3.3.6.1-1 for the channel. Completion Time: Immediately. Condition F. As required by Required Action C.1 and referenced in Table 3.3.6.1-1. Action: Isolate the affected penetration flow path(s). Competion time: 1 hour. Condition H: As required by Required Action C.1 and referenced in Table 3.3.6.1-1. Action H.1 Declare associated SLC subsystem inoperable in 1 hour. OR Action H.2: Isolate the Reactor Water Cleanup System in hour. Condition I: As req'd by Req'd Action C.1 and referenced in Table 3.3.6.1-1. Required Action I.1: Initiate action to restore channel to OPERABLE status IMMEDIATELY. OR Required Action I.2 Initiate action to isolate teh RHR Shutdown Cooling System IMMEDIATELY.

1. Contain reactor core, internals and moderator
2. Provide high integrity barrier against leakage of radioactive materials to drywell

To generate 1775 MWt such that:

1. No fuel damage occurs during normal operation and during transients
2. Strong negative reactivity feedback during severe plant transients and no inherent tendency for undamped power oscillations
3. Sufficient shutdown margin available at all times

1) Barrier to separate flows;

2) Guides control rod blades;

3) Rigidity/protection for fuel rods.

LCO: RCS pressure, RCS temperature, RCS heatup and cooldown rates, and the recirc pump starting temperature requirements shall be maintained within limits.

APPLICABILITY: At all times.

CONDITION A: Req'ts of LCO not met in Mode 1, 2, or 3.

ACTION A.1: Restore parameters within limits WITHIN 30 MINUTES.

CONDITION C: Req'ts of LCO not met in other than MODES 1,2 or 3.

ACTION C.1 Initiate action to restore parameter(s) to within limits IMMEDIATELY.

LCO: All jet pumps shall be operable

APPLICABILITY: Modes 1 and 2

LCO: RCS operational LEAKAGE shall be limited to:

• No pressure boundary leakage
• Less than or equal to 5 gpm unidentified leakage
• less than or equal to 25 gpm total leakage averaged over the previous 24 hour period
• less than 2 gpm increase in unidentified leakage within the previous period in Mode 1.

APPLICABILITY: Modes 1, 2 and 3

LCO: The reactor steam dome pressure shall be less than or equal to 1025.3 psig.

APPLICABILITY: modes 1 and 2

CONDITION: Reactor steam dome pressure not within limit.

ACTION: Restore to within limit WITHIN 15 MINUTES.

"RCS pressure and temperature are within the limits specified in Figures 3.4.9-2 and 3.4.9-3 (below); During heatup and cooldown, (average) rates are less than or equal to 100 degrees over a one hour period."

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1. Provides shielding to protect equipment from radiation and thermal effects;

2. Provides main protection for areas surrounding RX;

3. Assists in keeping dose ALARA.

197 total vessel penetrations.

Thermal Sleeves: Recirc inlet, Feedwater, core spray, CRD sleeves.

How many steam separator standpipes?

What is the moisture content of steam at the entrance to steam dryers?

129 steam separator standpipes.

10% moisture by weight steam enters the steam dryers.

1. Thermal sleeves
2. Vessel Differential temperature limit
3. Recirc pump start differential temperature limits

1) Provides a barrier to separate the two parrallel flow paths: one to cool the bundle and the other to suppress voids in the bypass region between the channels;

2) Guides the control rods;

3) Provides rigidity and protection for the fuel rods during handling.

USAR FUNCTIONS:

1) Provide heat sink during LOCA;

2) Provide a stagnation envelope for in-core sipping;

3) Transmits fuel assembly seismic loadings to the top guide.