ML20148K140

Proposed Tech Specs Re Control Room Emergency Filtration Sys

ML20148K140
Person / Time
Site:	Vogtle
Issue date:	03/23/1988
From:	GEORGIA POWER CO.
To:
Shared Package
ML20148K129	List: ML20148K126 ML20148K140
References
NUDOCS 8803310021
Download: ML20148K140 (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.

• 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 STANOBY 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 />.

liODES 5, and 6 during movement of irradiated fuel or movement of loads over irradiated fuel:

a. With one Control Room Emergency Filtration System inoperable, restore the inoperable sy; tem 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 power so,urce, suspend all operations involving movement of irradiated fuel or movement of loads over irradiated fuel, ,

l SURVEILLANCE REQUIREMENTS l

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 80 F

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 continuous hours with the heater control circuit energizea.

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• 8803310021 DR 880323 ADOCK 05000424 DCD '~

PLANT SYSTEMS .

SURVEIL' LANCE kEQUIREMENTS (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 850 cfm relative to adjacent .ireas during system operation;

4) Verifying that the heaters dissipate 118 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.

Af ter 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 DOP 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 2 10%; and

g. Af ter each complete or partial replacement of a charcoal adsorber l bank, by verifying that the charcoal absorbers retrove 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 1 10%.

l I

• The verification activicy specified by Paragraph 4.7.6.e.3 is waived with respect to the Unit 1 Control Room / Unit 2 Control Room dif; rential pressure during periods of operation of the Unit 2 Emergency HVAC System while conducting pre-operational testing of that system. The waiver is contingent upon the capability to shut down the applicable Unit 2 HVAC systems within 4.5 minutes after receipt of a Unit 1 Control Room Isolation signal.

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