ML20080K828

Proposed TS Page 15.3.3-6 to TS Change Request 178

ML20080K828
Person / Time
Site:	Point Beach
Issue date:	02/21/1995
From:	DUQUESNE LIGHT CO.
To:
Shared Package
ML20080K827	List: ML20080K824 ML20080K828
References
NUDOCS 9503010331
Download: ML20080K828 (1)

Text

. - -_ - _. . . _ ~ -, , ..

b fi ':

Q J -

, j i

, a. Four service water pumps are operable, two from each train.*

e

-l

b. All necessary valves, interlocks and~ piping required' for the '

functioning of the Service Water System during accident 1

- conditions are also operable. l

2. During power operation, the requirements of 15.3.3.D-1 may be modified' l to allow one of the following components to be' inoperable at any one- l time. If the system is not restored'to meet the conditions of j 15.3.3.D-1 within the time period specified, both reactors'will be  ;

placed in the hot shutdown condition within six hours and in cold j shutdown within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. l

a. One of the four required service water pumps may be out of ]

service provided a pump is restored to operable status within j 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. (

b. One of the two loop headers may be out of service for a period of

. l 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. l

c. A valve or other passive component may be out of' service provided repairs can be completed within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. ,

1 Basis  :

l e

The normal procedure for starting the reactor is, first, to heat the reactor j coolant to.near operating temperature, by running the reactor coolant pumps.  ;

The reactor is then made critical by withdrawing ' control rods and/or diluting I boron in the coolant.m With this mode of start-up, the energy. stored in the I reactor coolant during the approach to criticality is substantially equal to i that during power operation and therefore to be conservative most engineered l safety system components and auxiliary cooling systems, shall be fully operable. .!

During low temperature physics tests there is a negligible amount of stored  ;

j

~

energy in the reactor coolant, therefore an accident comparab'le in severity to the Design Basis Accident is not possible, and the engineered safety systems are j not required.  !

During the Unit le 199)4 refueling outage, one train $ service water pump l

operating with power supplied by the Alternate Shutdown System, 808/B09 480 volt buses, may be considered operable from a normal (offsite) power  ;

supply,; under the provisions of Technical Specification 15.3.0.C. l Unit 1 - Amendment No. 15.3.3-6 l

Unit 2 - Amendment No.  ;

9503010331 950221 PDR ADOCK 05000266 i P PDR ,

_ _ ,_