ML17261A986
| ML17261A986 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 02/23/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17261A978 | List: |
| References | |
| AP-RCS.3, NUDOCS 9003080336 | |
| Download: ML17261A986 (4) | |
Text
EOP:
AP-RCS.2 LOSS OF REACTOR COOLANT FLOW REV:
5 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:
Subcooling Margin = Saturation Temperature From Figure Below t-) Core Exit T/C Indication RC 2500 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0
S PRESSURE (PSIG)
RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION E CNMT NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F) 9003080336 900227 PDR ADQCK 05000244 PNU
/
EOP:
AP-RCS. 2 TITLE:
LOSS OF REACTOR COOLANT FLOW REVS 5
PAGE 1 of 1 ATTACHMENT NC NOTE: It may take several minutes following initial transient for natural circulation to develop.,
The following conditions indicate natural circulation flow:
o RCS subcooling based on core exit T/Cs GREATER THAN REQUIREMENTS OF FIGURE MIN SUBCOOLING
'I o
S/G pressures STABLE OR DECREASING o
RCS hot leg temperatures STABLE OR DECREASING o
Core exit T/Cs STABLE OR DECREASING o
RCS cold leg temperatures AT SATURATION TEMPERATURE FOR S/G PRESSURE The following ecyxipment should be operating to support natural circulation and cooling:
o Control rod shroud fans o
PRZR heaters (Refer to ER-PRZR.1, RESTORATION OF PRZR HEATERS DURING BLACKOUT) o One Reactor Compartment Cooling Fan