ML20214Q927

Proposed Tech Spec Tables 3.2.B & 3.2.B.1,clarifying Requirements for Undervoltage Relays

ML20214Q927
Person / Time
Site:	Pilgrim
Issue date:	05/22/1987
From:	BOSTON EDISON CO.
To:
Shared Package
ML20214Q921	List: ML20214Q919 ML20214Q927
References
NUDOCS 8706050265
Download: ML20214Q927 (4)

Text

Attachment B Proposed Changes to Tables 3.2.B and 3.2.B.1 Affected Pages:

50 ,

50a 53a B

8706050265 B70522 PDR ADOCK 05000293' PDR ;. ..

p l-

h l PNPS -

1 TABLE 3.2.B (Cont'd) -

l INSTRUMENTATION THAT INITIATES OR CONTROLS THE CORE AND CONTAINNENT COOLING SYSTEMS

• l  :

Minimum # of Operable Instrument Channels Per Trio System (1) Trio Function Trio Level Settina Remarks

! 2 Startup Transformer At 0 Volts between 1. Trips Startup Transformer Loss of Voltage 1.1 to 1.2 seconds to Emergency Bus Breaker.

Time Delay

2. Locks out autcmatic closure of Startup Transformer to Emergency Bus.

! 3. Initiates starting of

.l Diesel Generators in 4 4

conjunction with loss of 3

auxiliary transformer. i

4. Prevents simultaneous

, starting of CSCS components.

5. Starts load shedding

logic for Diesel Operation in conjunction with (a) Low Low Reactor Hater Level and Low

Reactor Pressure or (b)

High drywell pressure or (c) Core Standby Cooling System components in service in conjunction with Auxiliary Transformer breaker open.

50

PNPS TABLE 3.2.B (Cont'd)

INSTRUMENTATION THAT INITIATES OR CONTROLS THE CORE AND CONTAINMENT COOLING SYSTEMS ,

Minimum # of Operable Instrument Channels Per Trio System (1) Trio Function Trio Level Settina Remarks 2 Startup Transformer 3745V 2% with 1. Trips Startup Transformer Degraded Voltage 9.2 1 0.5 seconds to Emergency Bus Breaker.

time delay

2. Locks out automatic closure of Startup Transformer to Emergency Bus.

3. Initiates starting of Diesel Generators in conjunction with loss of auxiliary transformer.

4. Prevents simultaneous starting of CSCS components.

5. Starts load shedding logic for Diesel Operation in conjunction w*th (a) Low Lo.:

Reactor Water Level and Low Reactor Pressure or (b) High drywell pressure or (c) Core Standby Cooling System components in service in conjunction with Auxiliary Transformer breaker open.

50a

TABLE 3.2.B.1 INSTRUMENTATION THAT MONITORS EMERGENCY BUS VOLTAGE *

~

Minimum # of ,

Operable Instrument Channels Per Trio System Function Settina Remarks 1 Emergency 4160V Buses AS 3850V i 2% with Alerts Operator

& A6 Degraded Voltage 9.2 1 0.5 seconds to possible degraded Annunciation (1) time delay voltage conditions (1) In the event that the alarm system is determined inoperable, commence logging safety related bus voltage every 1/2 hour until such time as the alarm is restored to operable status.

Page 53a

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