ML20062G305

Proposed Tech Spec Figure 3.7-1 & Pages B 3/4 7-2 & 3/4 7-5 Re Auxiliary Feedwater Sys

ML20062G305
Person / Time
Site:	Calvert Cliffs
Issue date:	08/06/1982
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20062G286	List: ML20062G282 ML20062G305
References
NUDOCS 8208120309
Download: ML20062G305 (3)

Text

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A'ITACIE.E.7 1 Proj:ct - Est. No.

[ En g'r Date

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O, 1

1000 2

M m

900 (900,115) -Acceptable Oneration

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d B a 0 e

o W

w e m O

(v~) g, Dj 800 f5 y

740 (740,170) 700 80 90 100 110 120 130 140 150 160 170 180 AUXILIARY FEER lATER FIHd (GFM)

Figure 3.7-1 2 Steam Generater Pressure vs. Auxiliary Feedwater Flow (FOR AUIG"ATIC INITIATION OF AUXILIARY FEEDIATER FIN) es ;

k. ._,/

}M CALVEFT CLIFFS - U'1IT 1 3/4 7-5b Amendment No.

O 8208120309 820806 PDR ADOCK 05000317 P PDR Computed by Date Checked by Date Sheet of

ATTACHMENT 2 PLANT SYSTEMS BASES U = Maximum number of inoperable safety valves per operating steam line 106.5 = Power Level-High Trip Setpoint for two loop operation 46.8 = Power Level-High Trip Setpoint for single loop operation with two reactor coolant pumps operating in the same loop X = Total relieving capacity of all safety valves per steam line in Ibs./ hour Y = Maximum relieving capacity of any one safety valve in Ibs./hr 3/4.7.1.2 AUXILIARY FEEDWATER SYSTEM The OPERABILITY of the auxiliary feedwater system ensures that the Reactor Coolant System can be cooled down to less than 3000F from normal operating conditions in the event of a total loss of offsite power.

Each steam driven auxiliary feedwater pump is capable of delivering a total feedwater flow of 700 gpm at a Total Dynamic Head of 2490 ft. to the entrance of the steam generators. A capacity of 450 gpm, however, is sufficient to ensure that adequate feedwater flow is available to remove decay heat and reduce the Reactor Coolant System temperature to less than 300 0F when the shutdown cooling system may be placed into operation.

A minimum flow of 88 gpm and a maximum flow of 142 gpm to each steam generator when automatically initiating AFW flow for a steam generator pressure of 900 psia, is required to ensure sufficient time for Operator action to maintain an adequate heat sink for the reactor. A nominal flow setting of 115 gpm at 900 psia is used to account for instrument error and system flow repeatability. Figure 3.7-1 shows the allowable flow for various steam generator pressures.

The minimum flow is adequate to allow 20 minutes before the operator is required to increase AFW flow to 450 gpm. At the same time the maximum flow is adequate to ensure 20 minutes for the Operator to turn-off AFW flow if main feedwater is available. Failure to turn off AFW, in this case, would result in safety injection due to the rapid cooldown of the RCS.

C ALVERT CLIFFS - UNIT 1 B3/47-2 Amendment No. 59/67,

kTTACHMENT 3

, PLANT SYSTEMS AUXILIARY FEEDWATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.1.2 At least two steam turbine driven steam generator auxiliary feedwater pumps and associated flow paths shall be OPERABLE and capable of automatically initiating flow, within the limits of acceptable operation of Figure 3.7-1, to each steam generator.

APPLICABILITY: MODES 1, 2, and 3*.

ACTION:

a. With one auxiliary feedwater pump inoperable, restore at least two auxiliary feedwater pumps to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 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 />.

b. Whenever a subsystem is inoperable for the performance of periodic testing (i.e.,

manual discharge valve closed for pump discharge head test) a dedicated operator will be stationed at the local station (i.e., closed valve), with direct communication to the Control Room, to return the subsystem to normal upon instruction from the Control Room. Upon completion of any testing, the subsystem (valve) will be returned to its proper position and verified in its proper position by an independent operator check.

SURVEILLANCE REQUIREMENTS 4.7.1.2 Each auxiliary feedwater pump shall be demonstrated OPERABLE:

a. At least once per 31 days by:

1. Verifying that each steam turbine pump develops a Total Dynamic Head of 2800 f t. on recirculation flow when the secondary steam supply pressure is greater than 800 psig.

2. Cycling each testable, remote operated valve that is not in its operating position through at least one complete cycle.

3. Verifying that each valve (manual, power operated, or automatic) in the direct flow path is in its correct position.

b. Before entering MODE 3 after a COLD SHUTDOWN of at least 14 days by completing a flow test that verifies the flow path from the condensate stcrage tank to the steam generators.

c. At least once per 18 months by:

1. Verifying that each automatic valve in the flow path actuates to its correct position upon receipt of each auxiliary feedwater actuation test signal.

2. Verifying that each auxiliary feedwater pump starts as designed automatically upon receipt of each auxiliary feedwater actuation test signal.

• Automatic flow initiation need not be OPERABLE during MODE 3.

CALVERT CLIFFS - UNIT 1 3/47-5

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