ML20129D711

Rev 1 to Sys Procedure Sp 1105.21, Anticipatory Reactor Trip Sys Procedure

ML20129D711
Person / Time
Site:	Davis Besse
Issue date:	01/30/1985
From:	Murray T, Quennoz S TOLEDO EDISON CO.
To:
References
SP-1105.21, NUDOCS 8507300141
Download: ML20129D711 (5)

Text

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7 , Davis-Besse Nuclear Power Station SP 1105.21 Unit No. 1 System Procedure SP 1105.21 Anticipatory Reactor Trip System Procedure (ARTS)

EBR SET RETED Record of Approval and Changes Pr p red by Thonas R. Isley June 25. 19,82 Date Submitted by $bbkb

/Date/ ~

Section Head Ese = A=A by $d464 -~ 1/$/FM

' SRB Chairman / 4ste QA Approved Manager of Quality Assurance Data Approved by N b@ ' ' ^- % )Date7!N StationSuperintgdent Eavision SRB QA Sta. Supt.

No. Racommendation Date Approved Date Approved Date j , g4 Plant Manager Approval /Date o 3AN 9 1985 5 " G% /h'4 JAN 3 0 198!

00346 s PDR S

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, 1. PURPOSE The purpose of this procedure is to provide instructions for operating the Anticipatory Reactor Trip System (ARTS). The following conditions

, will be covered.

Energization Section 4 Deenergization Section 5 Resetting After a Trip Section 6 The ARTS system consists of four identical cabinets that receive inputs from the following systems; EHC, SFRCS, Main Feed Pump control oils and RPS. .

The inputs from the EHC and the main feed pumps use pressure switches to monitor control oil pressure. When the turbine trips or both main feed pumps are tripped, a trip signal will be sent to the ARTS cabinets.

The input from each SFRCS channel will send a trip signal to the ARTS when the SFRCS channel trips unless the SFRCS trip is due to a loss -

of all RCP's.

The trip signals sent to the ARTS cabinets are combined in a two out

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of four logic for each system monitored. (I.E., two out of four EHC

(;j:, switches must be open to trip ARTS). When an ARTS channel is tripped,  ;

it will open its respective trip breaker. The input from the RPS is reactor power. This signal is sent to a bistable that is reset when power is below 20% full power. When the bistable is reset the input from the EHC is bypassed allowing the turbine to be taken off line without tripping ARTS.

2. PRECAUTIONS AND I. IMITATIONS 2.1 When energizing an MtTS cabinet breaker CB-1 aust be on before turning on CB-2.

2.2 Opening breaker CB-2 will actuate all Alarms from the ARTS.

2.3 AD 1803.00, Safety Tagging Procedure, shall be followed at all '

times.

3. R'.'TERENCES (TS) 3.1 Davis-Besse Unit One Technical Specification Paragraph 3.3.2.3 3.2 Anticipatory Reactor Trip System Instruction Manual 3.3 AD 1803.00, Safety Tagging Procedure N

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• i 2 SP 1105.21.1 --

4. ARTS ENERGIZATION '

4.1 Prerequisites 4.1.1 Essential and non-essential AC Distribution panels are  ;

energized for the channel to be energized.

ARTS CHANNEL ESSENTIAL NON-ESSENTIAL 1 Y-1 Y-3601 2 Y-2 Y-3602 3 Y-3 Y-3601 4 Y-4 Y-3602 4.1.2 The Shift Supervisor has given pernission to energize the ARTS cabinets and has issued the necessary cabinet door keys.

4.2 Procedure 4.2.1 Check that both circuit breakers, CB-1 and CB-2 in the ARTS cabinet are off.

4.2.2 Close the essential AC circuit breaker for the channel to be energized. -

DISTRIBUTION CHANNEL PANEL BREAEER 1 Y-1 Y118 2 Y-2 Y217 3 Y-3 Y312 4 Y-4 Y412 1 NOTE: Also powered on Y118 is PDY 50005 (E633 SH 12), PDY 5000C, TY 5443, and IT 4909.

Powered on Y217 is PDY 5014 (E633 SR 12),

PDY 5014C, TY 5444 and FY 4908. .

4.2.3 Close the non-essential AC circuit breaker for the channel to be energized.

DISTRIBUTION CHANNEL PANEL BREAEER 1 Y-3601 33 l 2 Y-3602 32 3 Y-3601 34 l 4 Y-3602~ 39 -1 1

4.2.4 Place circuit breaker CB-1 in the ON position. Verify i l

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3 SP 1105.21.1 that the power on lights for the +48VDC, +15VDC,

-15VDC and +10VDC power supplies are on.

NOTE: The +10VDC power supply can take up to 10 sec. to come on.

4.2.5 Place circuit breaker CB-2 in the ON position. Verify that the power on light for the +9VDC power supply is on.

NOTE: The +9VDC power supply can take up to 10 sec. to Come on.

4.2.6 If desired, reset the ARTS per Section 6.

5. ARTS DEENERGIZATION 5.1 Prerequisites 5.1.1 The Shift Supervisor has given permission to deenergize the ARTS channel.

• 5.2 Procedure 5.2.1 Open circuit breaker CB-2.

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l . 5.2.2 Open circuit breaker CB-1.

5.2.3 Open the non-essential AC circuit breaker for the channel to be deet.ergized.

DISTRIBUTION CHANNEL PANEL BREAEER

1 Y-3601 33 2 Y-3602 32 3 Y-3601 34 4 Y-3602 39 5.2.4 open the essential AC circuit breaker for the channel to be deenergized.

DISTRIBUTION CHANNEL PANEL BREAEER 1 Y-1 Y118 2 Y-2 Y217 3 Y-3 Y312 4 Y-4 Y412 1 NOTE: Also powered on Y118 is PDY 5000B (E633 i..

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(SR 12), PDY 5000C, TY 5443, and FT 4909.

. 1 Powered,on Y217 is PDY 5014 (E633 SH 12), l iPDY 5014C, TY 5444 and FY 4908. '

6. RESETTING AFTER A TRIP 6.1 Prerequisites 6.1.1 The cause of the trip has been corrected or Shift Supervisor has authorized resetting with an unknown cause.

6.1.2 The Shift Supervisor La. given permission to reset ARTS.

6.2 Procedure 6.2.1 Verify the 1/5 lights are OFF.

6.2.2 Press the.Roset button and verify the TRIP lisht goes OFF. "

6.2.3 Reset the CRD trip bre.skers per SP 1105.09.

END

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