ML20154K180
| ML20154K180 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 05/19/1988 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20154K179 | List: |
| References | |
| NUDOCS 8805270283 | |
| Download: ML20154K180 (2) | |
Text
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' PLANT SYSTEMS 3/4.7.6 CONTROL ROOM EMERGENCY FILTRATION SYSTEM LIMITING CONDITION FOR OPERATION 3.7.6 Two independent Control Room Emergency Filtration Systems shall be OPERABLE (Notes 1,2,3,4).
l APPLICABILITY:
MODES 1, 2, 3, and 4.
MODES 5 and 6 during movement of irradiated fuel or movement of loads over irradiated fuel.
ACTION:
MODES 1, 2, 3 or 4:
With one Control Room Emergency Filtration System inoperable, restore the inoperable system to OPERABLE status within 7 days or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUT 00WN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
MODES 5, and 6 during movement of irradiated fuel or movement of loads over irradiated fuel:
With one Control Room Emergency Filtration System inoperable, a.
restore t5e inoperable system to OPERABLE status within 7 days or initiate and maintain operation of the remaining OPERABLE Control Room Emergency Filtration System in the emergency mode, b.
With both Control Room Emergency Filtration Systems inoperable, or with the OPERABLE Control Room Emergency Filtration System, required to be in the emergency mode by ACTION a., not capable of being powered by an OPERABLE emergency pcwer source, suspend all operations involving movement of irradiated fuel or movement of loads over irradiated fuel.
SURVEILLANCE REQUIREMENTS 4.7.6 Each Control Room Emergency Filtration System shall be demonstrated OPERABLE:
a.
At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that the control room air temperature is less than or equal to 85*F l
b.
At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flow (FI-12191, FI-12192) through the HEPA filters and charcoal adsorbers and verifying that the system operates for at least 10 cantinuous hours with the heater control circuit energized.
V0GTLE - UNIT 1 3/4 7-14 8805270283 880519 PDR ADOCK 05000424 P
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PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 3)
Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/8 inch Water Gauge at less than or equal to a pressurization flow of 1500cfm l
relative to adjacent areas during system operation; 4)
Verifying that the heaters dissipate 118 2 6 kW when tested in accordance with Section 14 of ANSI N510-1980; and 5)
Verifying that on a Control Room / Toxic Gas Isolation test signal, the control room isolation dampers close within 6 seconds and the system automatically switches into an isolation mode of operation with flow through the HEPA filters and charcoal adsorbers.
f.
After each complete or partial replacement of a HEPA filter bank, by verifying that the HEPA filter banks remove greater than or equal to 99.95% of the 00P when they are tested in place in accordance with Section 10 of ANSI N510-1980 while operating the system at a flow rate of 19,000 cfm
- 10%; and g.
After each complete or partial replacement of a charcoal adsorber bank, by verifying that the charcoal absorbers remove greater than or equal to 99.95% of a halogenated hydrocarbon refrigerant test gas when tested in place in accordance with Section 12 of ANSI N510-1980 while operating the system at a flow rate of 19,000 cfm
- 10%.
Note 1:
Ouring Control Room Emergency Filtration System testing preceding removal of the temporary control room wall, the Unit 1 Control Room / Unit 2
Control Room differential pressure requirement of Specification 4.7.6.e.3 is waived.
The waiver is contingent upon the capability to shut down the applicable Unit 2 HVAC systems and close the applicable Unit 1/ Unit 2 HVAC Isolation dampers within 4.5 minutes after receipt of a Unit 1 Control Room Isolation signal.
Note 2:
Af ter commencement of Unit 1 Control Room Emergency Filtration System flow balancing for two-unit operation, verification of control room pressurization in accordance with Specification 4.7.6.e.3 is waived for a period not to exceed 7 days.
This waiver is contingent upon receipt of acceptable test results for control room pressurization l
testing prior to breaching the temporary control room wall.
l Note 3:
Unit 2 Control Room Emergency Filtration System fans (2-1531-N7-001 arid 2-1531-N7-002) shall be controlled to prevent operation following the completion of the initial two unit control room I
pressurization test (pursuant to Specification 4.7.6.e.3) after removal j
of the temporary control room wall.
Note 4: At least one Unit 2 Control Room isolation damper (2HV-12114 or 1
2HV-12115) shall be locked closed and both Unit 1 Control Room isolation dampers (1HV-12114 and 1HV-12115) shall be locked open.
The Unit 2 Control Room isolation dampers (2HV-12114 or 2HV-12115) may be opened when the Unit 1 Control Room Emergency Filtration System is operating in the emergency (pressurization) mode.
V0GTLE - UNIT 1 3/4 7-16
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