EOP Supplements Flashcards
What does EOP Supplement 1 Pressure Temperature Limit Curves provide?
They provide the plant PCS pressure/temperature curves, [post accident PT limits], that define the acceptable combinations of PCS pressure and temperature.
The lower subcooling limit and the upper pressurized thermal shock (PTS) limit define the boundaries for PCS operation.
When are the subcooled margin monitors least accurate?
At low pcs pressures.
RI-69 Basis Document assumes that as long as the saturated condition is NOT exceeded an alarm condition does NOT exist. This document determined the [minimum RCS subcooling] setpoint for the subcooling margin monitor. It should be noted that this document shows that, when PCS pressure is high, the subcooling margin monitor instrument error is less than when PCS pressure is low.
What does EOP Supplement 2 PCS Cooldown Strategy provide the operator?
It determine available Feedwater inventory to the Auxiliary Feedwater System. This enables the operator to determine whether sufficient Feedwater inventory exists to perform the planned actions and establishes the minimum cooldown rate required to reach Shutdown Cooling entry conditions with existing Feedwater inventory.
The inventory required to remove sensible heat and cool the PCS to shutdown cooling entry conditions is subtracted from the total available inventory. This leaves the available inventory for decay heat removal. EOP Supplement 2 figures with different PCP configurations are used to determine the remaining maximum time interval that available Feedwater inventories will support both sensible heat and decay heat removal.
What are the four heat removal curves in EOP Supplement 2, “PCS Cooldown Strategy?”
Sensible Heat Removal Curve
Decay Heat Removal Curve - No PCPs Operating
Decay Heat Removal Curve - One or Two PCPs Operating
Decay Heat Removal Curve - Three or Four PCPs Operating
What does EOP Supplement 3 “Starting Primary Coolant Pumps” provide the operator? What is considered?
Provide the operator with the criteria for restarting one or more PCPs during the event.
Once PCPs have been stopped, restarting PCPs should be considered a major plant evolution and given considerable thought before restart is attempted
- Bus 1A or 1B energized.
- Y01 energized. (Power to bearing temperature and other PCP status indicators.)
- At least one Steam Generator is available for removing heat (feed flow and steam flow) from the PCS.
- Single phase natural circulation has been established for the preceding 20 minutes in the loop selected for the first PCP restart.
- Pressurizer level as corrected in EOP Supplements 9 and 10 is between: 42% to 57% and controlled for the first PCP started, 42% to 85% and controlled for subsequent PCP starts
- Saturation pressure using Pressurizer water phase temperature is greater than the Minimum Pressure for PCP Operation curve for the existing PCS temperature. REFER TO EOP Supplement 1, “Pressure Temperature Limit Curves.”
- Average of Qualified CETs is at least 25F subcooled from EOP Supplement 1, “Pressure Temperature Limit Curves,” “Upper Portion” curve.
- CCW to PCPs has NOT been interrupted longer than ten minutes AND CCW is supplying the selected PCP.
- At least one of the following PCP Controlled Bleedoff paths is OPEN: PCP Controlled Bleedoff Stop Valve, CV-2191, PCP Controlled Bleedoff Isolation Valves:CV-2083 & CV-2099
What does EOP Supplement 4, “HPSI and LPSI Flow Curves,” provide the operator?
It supplies the HPSI/LPSI Pump flow curves used to verify that the HPSI/LPSI Pumps are providing adequate injection flow for the given PCS pressure.
THIS SUPPLEMENT SHALL NOT BE USED AS THE BASIS TO THROTTLE SAFETY
INJECTION TOTAL FLOW.
The flow values were rounded to the nearest whole number for instrument readability. Instrument uncertainty was not included as the values used are a qualitative check to verify the system is operating as expected.
What does EOP Supplement 5, Checklist for Safeguards Equipment Following SIAS, provide the operator?
This supplement provides a single source for the operator to ensure the correct equipment status following a SIAS initiation. Associated actuation channels are included to inform the operator of expected equipment response (non-response) to a SIAS channel failure.
Also provides a follow up action to re-energize E-Bus.
Re-energizing 1E Bus is required after SIAS because 1E is de-energized by SIAS. It is desirable to re-energize 1E Bus as soon as possible for the following reasons:
a. Power to the OSC (Operations Support Center) is ultimately fed from 1E Bus.
b. 1E Bus powers one-half of the Pressurizer heaters.
c. Re-energizing 1E Bus restores Automatic makeup of T-2 Condensate Storage Tank from T-939, Demineralized Water Storage Tank. This is an important action
credited in the Probabilistic Safety Assessment (PSA). Since the PSA evaluates
accident scenarios over a 24-hour period and the Technical Specifications only
require an eight hour supply, replenishment of T-2 from T-939 is important to
prevent core damage.
Also provides SI Throtteling Criteria
What does EOP-Supplement 6, Checksheet for Containment Isolation and CCW Restoration, provide the operator?
It provides a single source for the operator to ensure correct equipment status
following a Containment Isolation initiation by a CHP or CHR signal. Associated actuation channels are included to inform the operator of expected equipment response (or non-response) to a CIS channel failure.
Page two of the supplement provides the criteria for re-opening the Containment CCW valves if Containment conditions allow. This page was added for the convenience of the operator.
What do EOP Supplements 7 & 8, Battery #1 (2) Load Stripping, provide the operator?
They provide a method for maintaining Battery #1 (2) load less than or equal to the analyzed {maximum battery amperage} load when an associated Battery Charger is NOT available.
What does EOP Supplement 9, PZR Level Correction - Hot Cal, provide the operator?
LIC-101A and LIC-0101B are hot calibrated
It provides correction factors for determining the actual Pressurizer level based on current Pressurizer level instrument readings, elevated Containment temperature, and reduced PCS pressure.
The operator should first determine if the Pressurizer level instrument is being decalibrated by elevated Containment ambient temperature affecting the reference leg density. This correction factor is used to normalize the level reading due to the effects of Containment temperature being higher than during instrument calibration.
Next, Containment temperature corrected Pressurizer level is compensated for PCS pressure changes by selecting the level correction curve for current PCS pressure. Compensation for PCS pressures between the provided curves can be conservatively determined using the next lower pressure curve.
What does EOP Supplement 10, PZR Level - Cold Cal, provide the operator?
It provides correction factors for determining the actual Pressurizer level based on current Pressurizer level instrument readings, elevated Containment temperature, and reduced PCS pressure. LIC-102A and LIC-0103A are cold calibrated.
First, normalize level reading due to temperature.
Second, take normalized reading and adjust for PCS pressure.
What does EOP Supplement 11, S/G Level Correction, provide the operator?
It provides correction factors for determining the actual Steam Generator level based on current Steam Generator level instrument readings, elevated Containment temperature, and reduced Main Steam pressure.
Since Steam Generator level instruments LI-0751 and LI-0752 are hot calibrated, calibrated at operating pressure after PCS heatup, their indicated levels must be compensated for changes in Main Steam pressure and elevated Containment temperature.
The operator should first determine if the Steam Generator level instrument is being affected by elevated Containment ambient temperature. This correction factor is used to normalize the level reading due to the effects of Containment temperature being higher than during instrument calibration.
Next, Containment temperature corrected Steam Generator level is compensated for Main Steam pressure changes by selecting the level correction curve for current Main Steam pressure. Compensation for Main Steam pressures between the provided curves can be conservatively determined using the next lower pressure curve.
What do EOP Supplement 12, ‘A’ S/G SGTR Isolation Checklist, and Supplement 13, ‘B’ S/G SGTR Isolation Checklist provide the operator?
They provides the actions to be taken to isolate S/G E-50A(B) due to a Steam Generator Tube Rupture. Upon the determination that S/G E-50A(B) has a tube leak,
immediate efforts are taken to isolate the S/G to minimize the spread of contamination to the environment and reduce contamination of the plant.
This supplement is written to perform sections 1.0 and 2.0 concurrently to expedite
S/G E-50A isolation.
What does EOP Supplement 14, SGTR Area Survey, provide the operator?
It provides radiation protection personnel with a specified location plan for consistent surveys during a Steam Generator Tube Rupture.
This supplement provides consistent area survey locations where radiation levels are expected to rise and where no previous radiation levels may have existed.
What does EOP Supplement 15, Enable Opening S/G Blowdown Control Valves, provide the operator?
It provide the steps and approvals for bypassing the S/G Blowdown Valve isolation signal.
The S/G Blowdown Valves are closed automatically following a CHP/CHR isolation signal or RIA-0707 high radiation isolation signal.
In order to provide sampling of the affected S/G, the blowdown line must be placed in service since the sample points for the S/G secondary sides are downstream of the blowdown isolation valves.
