ML20207M579

Proposed Tech Specs Re Min Water Level Required to Be Maintained in Condensate Storage Tank

ML20207M579
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	01/09/1987
From:	PORTLAND GENERAL ELECTRIC CO.
To:
Shared Package
ML20207M561	List: ML20207M554 ML20207M574 ML20207M579
References
TAC-60095, NUDOCS 8701130224
Download: ML20207M579 (2)

Text

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LCA 134, Revision 1 Attachment 2d ' Page 1 of 2 PLANT SYSTEMS CONDENSATE STORAGE TANK LINITING CONDITION FOR OPERATION 3.7.1.4 .The condensate storage tank shall be OPERABLE with a minimum contained volume of 239,000 gallons of water.

APPLICABILITY: MODES 1, 2 and 3.

ACTION:

With the condensate storage tank: inoperable, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> either:

a. Restore the condensate storage tank to OPERABLE status or be =

in HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, or

b. Demonstrate the OPERABILITY of the Service Water System as a backup supply to the auxiliary feedwater pumps and (

restore the condensate storage tank to OPERABLE. status ;L within 7 days or be in HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

SURVEILLANCE REQUIRENENTS 4.7.1.4.1 The condensate storage tank shall be demonstrated OPERABLE at least or.ce per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying the water level is within its limit when the tank is the supply source for the auxiliary feedwater pumps.

4.7.1.4.2 The Service Water System shall be demonstrated OPERABLE 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 at least one Service Water System train is operating and that the Service Water System-feedwater isolation valvet are either open or OPERABLE whenever the Service Water System is the supply source for the auxiliary feedwater pumps.

L l

TROJAN-UNIT 1 3/4 7-8 QTM P

S 4

• LCA 134, Revisicn 1 Attachment

-s Page 2 of 2 PLANT SYSTEMS BASES U = Maximum number of inoperable safety valves per operating steam line

109 = Power Range Neutron Flux-High Trip Setpoint for 4 loop-operation 75 - Maximum percent of RATED THERMAL POWER permissible by P-8 Setpoint for 3 loop operation X = Total relieving capacity of all safety valves per steam 6

line in lbs/ hour (4.12 x 10 lbs/hr)

Y=Maximumrelievingcgpacityofanyonesafetyvalvein lbs/ hour (9.27 x 10 lbs/hr) 3/4.7.1.2 AUXILIARY FEEDWATER SYSTEM The OPERABILITY of the auxiliary feedwater systems ensures that the Reactor Coolant System can be cooled down to less than 350*F from normal operating conditions in the event of a total loss of off-site power.

Either of the two pumps has the required capacity to provide sufficient feedwater flow to remove reactor decay heat and reduce the RCS temperature to 350*F where ch, Residual Heat Removal System may be placed into operation for continued cooldown.

-The electric auxiliary feedwater pump is not safety grade and is used during startup and shutdown to preclude unnecessary wear on the safety-related pumps. The electric auxiliary feedwater pump has approximately the same rated capacity as either of the safety-related pumps.

With no auxiliary feedwater pumps OPERABLE, power is reduced to 35 per-cent, because at this power level the feedwater regulating valves should be in AUTO and the plant in a stable low power mode which does not require auxiliary feedwater.

3/4.7.1.3 (deleted) 3/4.7.1.4 CONDENSATE STORAGE TANK The OPERABILITY of the condensate storage tank with the minimum water volume ensures that sufficient water is available to maintain the RCS at HOT STANDBY conditions for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> with steam discharge

, at atmosphere concurrent with total loss of off-site power. The mini-mum contained volume accounts for: (1) water volume required to be delivered to the steam generators (196,000 gallons), (2) unusable volume in the bottom of the tank (27,700 gallons), and (3) instrument error (14,400 gallons), rounded of f to 239,000 gallons.

TROJAN-UNIT 1 B 3/4 7-2 Amendment No. 57, 93