ML20112D035

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Approved Tech Specs,Amends 127 & 116 & Proposed TS for Units 2 & 3
ML20112D035
Person / Time
Site: San Onofre  Southern California Edison icon.png
Issue date: 05/29/1996
From:
SOUTHERN CALIFORNIA EDISON CO.
To:
Shared Package
ML20112D021 List:
References
NUDOCS 9606040032
Download: ML20112D035 (15)
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ATTACHMENT A AMENDMENT NO. 127 APPROVED TECHNICAL SPECIFICATIONS AND BASES UNIT 2 9606040032 960529 PDR ADOCK 05000361 P PDR

i l AC Sources-0perating l 3.8.1 t

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SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.18' -------------------NOTE-------------------

Credit may be taken for unplanned events

- 'that satisfy this SR.

l Verify interval bet' ween each sequenced load 24 months block is within i 10% of design interval for each emergency and shutdown load programmed time interval load sequence.

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SAN ONOFRE--UNIT 2 3.8-13 -

Amendment No. 127 1

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AC Sources-0perating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.18 REQUIREMENTS (continued) As required by Regulatory Guide 1.108 (Ref. 9),

paragraph 2.a.(2), each DG is required to demonstrate proper operation for the DBA loading sequence to ensure that voltage and frequency are maintained within the required limits. Under accident conditions, prior to connecting the DGs to their respective buses, all loads are shed except load center feeders and those motor control centers that power Class IE loads (referred to as " permanently connected" loads). Upon reaching 90% of rated voltage and fregtfency, the DGs are then connected to their respective buses. Loads are then sequentially connected to the bus by the programmed l time interval load sequence. The sequencing logic controls  ;

the permissive and starting signals to motor breakers to prevent overloading of the DGs due to high motor starting 1 currents. The 10% load sequence start time tolerance ensures that sufficient time exists for the DG to restore frequency and voltage prior to applying the next load and that safety analysis assumptions regarding ESF equipment time delays are not violated. Reference 2 provides a summary of the automatic loading of-ESF buses.

The Frequency of 24 months is consistent with the  ;

recommendations of Regulatory Guide 1.108 (Ref. 9),  !

paragraph 2.a.(2); takes into consideration unit conditions  !

required to perform the Surveillance; and is intended to be i consistent with expected fuel cycle lengths.  !

This SR is modified by a Note which acknowledges that credit may be taken for unplanned events that satisfy this SR.

SR 3.8.1.19 In the event of a DBA coincident with a loss of offsite power, the DGs are required to supply the necessary power to ESF systems so that the fuel, RCS, and containment design limits are not exceeded.

This Surveillance demonstrates the DG operation, as discussed in the Bases for SR 3.8.1.11, during a loss of offsite power actuation test signal in conjunction with an ESF actuation signal (SIAS). In lieu of actual (continued)

SAN ON0FRE--UNIT 2 B 3.8-26 Amendment No. 127

4 - +- 4 s- J m,e anA a -u _.__.l. . .- 4__ w-h ATTACHMENT B AMENDMENT NO. 116 APPROVED TECHNICAL SPECIFICATIONS AND BASES UNIT 3

.. -- . --. .- .- ..= . - _ . . . . - . - - .-. . .-

AC Sources--Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.18 -------------------NOTE-------------------

Credit may be taken for unplanned events that satisfy this SR.

Verify interval between each sequenced load 24 months block is within i 10% of design interval for each emergency and shutdown load programmed time interval load sequence.  ;

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SAN ON0FRE--UNIT 3 3.8-13 Amendment No. 116 l

AC Sources-Operating B 3.8.1 i

BASES SURVEILLANCE SR 3.8.1.18 REQUIREMENTS (continued) As required by Regulatory Guide 1.108 (Ref. 9),

paragraph 2.a.(2), each DG is required to demonstrate proper operation for the DBA loading sequence to ensure that voltage and frequency are maintained within the required limits. Under acc.ident conditions, prior to connecting the DGs to their respective buses, all loads are shed except load center feeders and those motor control centers that power Class 1E loads (referred to as " permanently connected" loads). Upon reaching 90% of rated voltage and frequency, the DGs are then connected to their respective buses. Loads are then sequentially connected tc the bus by the programmed time interval load sequence. The sequencing logic controls the permissive and starting signals to motor breakers to prevent overloading of the DGs due to high motor starting currents. The 10% load sequence start time tolerance ensures that sufficient time exists for the DG to restore frequency and voltage prior to. applying the next load and that safety analysis assumptions regarding ESF equipment time delays are not violated. Reference 2 provides a summary of the automatic loading of ESF buses.

The Frequency of 24 months is consistent with the recommendations of Regulatory Guide 1.108 (Ref. 9),

paragraph 2.a.(2); takes into consideration unit conditions

, required to perform the Surveillance; and is intended to be consistent with expected fuel cycle lengths.

This SR is modified by a Note which acknowledges that credit may be taken for unplanned events that satisfy this SR.

SR 3.8.1.19 In the event of a DBA coincident with a loss of offsite power, the DGs are required to supply the necessary power to ESF systems so that the fuel, RCS, and containment design limits are not exceeded. .

This Surveillance demonstrates the DG operation, as discussed in the Bases for SR 3.8.1.11, during a loss of offsite power actuation test signal in conjunction with an ESF actuation signal (SIAS). In lieu of actual (continued)

SAN ONOFRE--UNIT 3 B 3.8-26 Amendment No. 116

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i ATTACHMENT C PROPOSED TECHNICAL SPECIFICATIONS AND BASES UNIT 2 l

AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY ,

SR 3.8.1.18 ------------------NOTE-------------------

Credit may be taken for unplanned events that satisfy this SR.

Verify timing of each sequenced load 24 months block is within i 10% of its setting or i 2.5 seconds, whichever is greater, with the exception of the 5 second load group which is -0.5, +2.5 seconds (refer to '

Table B 3.8.1-1), for each emergency and shutdown load programmed time interval load sequence.

4 (continued) i 1

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l SAN ON0FRE--UNIT 2 3.8-13 Amendment No.

. . - . - --- - - _ - . - . - .- - -. . - = . . --

i AC Sources-Operating B 3.8.1  ;

BASES'

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SURVEILLANCE SR 3.8.1.18 REQUIREMENTS (continued) As required by Regulatory Guide 1.108 (Ref. 9), {

paragraph 2.a.(2), each DG is required to demonstrate proper.  :

operation for the DBA loading sequence to en::ure that I voltage and frequency are maintained within the required limits. Under accident conditions, prior to connecting the DGs to their respective buses, all loads are shed except load center feeders and those motor control centers that power Class IE loads (referred to as " permanently connected" l loads . At or near rated voltage and fre ,

then c)onnected to their res)ective buses.quency, Loads arethe DGs are then l l sequentially connected to tie bus by the programmed time interval load sequence. The sequencing logic controls the permissive and starting signals to motor breakers to prevent overloading of the DGs due to high motor starting currents.

The load sequence start time tolerance ensures that sufficient time exists for the DG to restore frequency and voltage prior to applying the next load and that safety analysis assumptions regarding ESF equipment time delays are ,

not violated. Reference 2 provides a summary of the i automatic loading of ESF buses. Table B 3.8.1-1 provides a ,

matrix of loads sequenced by the ESF timing logic. The timer as-left setting requirement and the as-found 1 acceptance criteria are provided in Table B 3.8.1-1.

The Frequency of 24 months is consistent with the recommendations of Regulatory Guide 1.108 (Ref. 9),

paragraph 2.a.(2); takes into consideration unit conditions required to perform the Surveillance; and is intended to be consistent with expected fuel cycle lengths.

This SR is modified by a Note which acknowledges that credit may be taken for unplanned events that satisfy this SR.

SR 3.8.1.19 In the event of a DBA coincident with a loss of offsite power, the DGs are required to supply the necessary power to ESF systems so that the fuel, RCS, and containment design limits are not exceeded.

This Surveillance demonstrates the DG operation, as

~ discussed in the Bases for SR 3.8.1.11, during a loss of offsite power actuation test signal in conjunction with an ESF actuation signal (SIAS). In lieu of actual (continued)

SAN ON0FRE--UNIT 2 B 3.8-26 Amendment No.

TABLE 8 3.8.1-12 DG LOAD SEQUENCING TIMER ACCEPTANCE CRITERIA l Start Nominal As-Found i Time Setting Tolerance (Sec) (As Left (Sec)

Tolerance)

(Sec)

1. LPSI Pumps POIS, P016 5.00 10.5 -0.5

+2.5

2. Dome Air Circ Fans 5.00 0.5 -0.5 A071, A074, A072, A073 +2.5
3. Control Room AC Units 5.00 10.5 -0.5 E418, E419 +2.5 l 4. Containment Spray Pumps 10.00 10.5 *2.5

! P012, P013

! 5. Diesel Gen Radiator 10.00 10.5 12.5 i Fans E546, E550, E547, E549

6. Component Cooling Pumps 15.00 10.5 *2.5 P024, P025, P026
7. DG Bldg Emergency Fans -15.00 10.5 *2.5 A274, A275, A276, A277
8. Salt Water Cooling 20.00 10.5 *2.5 Pumps P112, P307, P113, P114
9. Aux Feed Water Pumps 30.00 10.5 *3.0 P141, P504
10. Emergency Chillers 35.00 *0.5 13.5 l E336, E335 l

l SAN ONOFRE--UNIT 2 8 3.8-26a Amendment No.

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ATTACHMENT D

PROPOSED TECHNICAL SPECIFICATIONS AND BASES UNIT 3 l

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l AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.18 ------------------NOTE-------------------

Credit may be taken for unplanned events that satisfy this SR.

Verify timing of each sequenced load 24 months block is within i 10% of its setting or i 2.5 seconds, whichever is greater, with the exception of the 5 second load group which is -0.5, +2.5 seconds (refer to Table B 3.8.1-1), for each emergency and shutdown load load sequence. programmed time interval (continued)

SAN ONOFRE--UNIT 3 3.8-13 Amendment No.

AC Sources-Operating B 3.8.1 t BASES i

i SURVEILLANCE SR 3.8.1.18  !

REQUIREMENTS (continued) As required by Regulatory Guide 1.108 (Ref. 9),

1 paragraph 2.a.(2), each DG is required to demonstrate proper

operation for the DBA loading sequence to ensure that voltage and frequency are maintained within the required i l limits. Under accident conditions, prior to connecting the i

DGs to their respective buses, all loads are shed except load center feeders and those motor control centers that  :

power Class 1E loads (referred to as " permanently connected" t

-loads). At or near rated voltage and frequency, the DGs are 4

then connected to their res)ective buses. Loads are then  ;

sequentially connected to tie bus by the programmed time '

interval load sequence. The sequencing logic controls the permissive and starting signals to motor breakers to prevent

  • overloading of the DGs due to high motor starting currents.

The load sequence start time tolerance ensures that sufficient time exists-for the DG to restore frequency and i voltage prior to applying the next load and that safety. i analysis assumptions regarding ESF equipment time delays are  !

not violated. Reference 2 provides a summary of the automatic loading of ESF buses. Table B 3.8.1-1 provides a ,

matrix of loads sequenced by the ESF timing logic. The '

timer as-left-setting requirement and the as-found acceptance criteria are provided in Table B 3.8.1-1.

The Frequency of 24 months is consistent with the l recommendations of_ Regulatory Guide 1.108 (Ref. 9),  !

paragraph 2.a.(2); takes into consideration unit conditions j required to perform the Surveillance; and is intended to be i consistent with expected fuel cycle lengths. ,

' This SR is modified by a Note which acknowledges that credit l may be taken for unplanned events that satisfy this SR.

a SR 3.8.1.19 In the event of a DBA coincident with a loss of offsite power, the DGs are required to supply the necessary power to ESF systems so that the fuel, RCS, and containment design limits are not exceeded.

This Surveillance demonstrates the DG operation, as discussed in the Bases for SR 3.8.1.11, during a loss of offsite power actuation test signal in conjunction with an ESF actuation signal (SIAS). In lieu of actual (continued) ,

SAN ON0FRE--UNIT 3 B 3.8-26 Amendment No.

TABLE B 3.8.1-1 DG LOAD SEQUENCING TINER ACCEPTANCE CRITERIA Start Nominal As-Found Time Setting Tolerance (Sec) (As Left) (Sec)

Tolerance (Sec)

1. LPSI Pumps P015, P016 5.00 10.5 -0.5

+2.5

2. Dome Air Circ Fans A071, 5.00 i0.5 -0.5 A074, A072, A073 +2.5
3. Control Room AC Units 5.00 10.5 -0.5 E418, E419 +2.5
4. Containment Spray Pumps 10.00 *0.5 *2.5 P012, P013
5. Diesel Gen Radiator Fans 10.00 10.5 *2.5 E546, E550, E547, E549
6. Component Cooling Pumps 15.00 0.5 *2.5 P024, P025, P026
7. DG Bldg Emergency Fans 15.00 10.5 *2.5 A274, A275, A276, A277
8. Salt Water Cooling Pumps 20.00 10.5 12.5 P112, P307, P113, P114
9. Aux Feed Water Pumps 30.00 *0.5 i3.0 P141, P504
10. Emergency Chillers E336, 35.00 10.5 13.5 I E335 i i

l SAN ON0FRE--UNIT 3 B 3.8-26a Amendment No.

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I ATTACHMENT E SUPPORTING ANALYSES 1

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