ML20211Q807

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Proposed Tech Specs & Associated Bases for Specification 3/4.8.1, AC Sources, to Eliminate Requirement for Accelerated Testing of Standby DGs & Associated NRC Reporting Requirements
ML20211Q807
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 09/08/1999
From:
HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20211Q771 List:
References
NUDOCS 9909150159
Download: ML20211Q807 (18)
v • d • e


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, NOC-AE-000629 i Attachment 5 Page 1 of 7 l

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l ATTACHMENT 5 ANNOTATED  !

l TECHNICAL SPECIFICATION PAGES 9909150159 990908 PDR ADOCK 05000498 P PDR 1.

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, NOC-AE-000629 Attachment 5

. Page 2 of 7 Annotated Technical SDecification Pages l The following Technical pages are annotated with changes. Additions are indicated with bold type, deletions are designated by line through and are indicated by change bars in the right hand ]

column. '

l Index page x

! .Page 3/4 8-3 Page 3/4 8-6 Page 3/4 8-7 I

' Page 3/4 8-8 i

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. NOC-AE-000629 l Attachment 5 Page 3 of 7 INDEX LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS SECTIO.E PAGE 3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES Operating 3/48-1 TABLE 4.8-1 D!ESEL GENERATOR TEST SCHEDL"~E 3/48-8 I

(This table number not used)

Shutdown 3/4 8-9 3/4.8.2 D.C. SOURCES Operating 3/4 8-10 TABLE 4.8-2 BA'lTERY SURVEILLANCE REQUIREMENTS 3/4 8-12 Shutdown 3/4 8-13 3/4.8.3 ONSITE POWER DISTRIBUTION Operating 3/4 8-14 Shutdown 3/4 8-16 3/4.8.4 ELECTRICAL EQUIPMENT PROTECTIVE DEVICES Containment Penetration Conductor Overcurrent Protective Devices 3/4 8-17 3/4.9 REFUELING OPERATIONS 3/4.9.1 BORON CONCENTRATION 3/49-1 3/4.9.2 INSTRUMENTATION 3/49-2 3/4.9.3 DECAY TIME 3/49-3 3/4.9.4 CONTAINMENT BUILDING PENETRATIONS 3/49-4 3/4.9.5 COMMUNICATIONS 3/4 9-5 3/4.9.6 REFUELING MACHINE 3/4 9-6 3/4.9.7 CRANE TRAVEL - FUEL HANDLING BUILDING 3/4 9-7 .

l 3/4.9.8 RESIDUAL HEAT REMOVAL AND COOLANT CIRCULATION High Water Level 3/49-8 Low Water Level 3/49-9 3/4.9.9 CONTAINMENT VENTILATION ISOLATION 3/4 9-10 SYSTEM 3/4.9.10 WATER LEVEL- REFUELING CAVITY 3/49-11 ,

SOUTH TT~TAS - UNITS 1 & 2 x

,' NOC-AE-000629 Attachment 5 ELECTRICAL POWER SYSTEMS SURVEILLANCE REOUIREMENTS  ;

4.8.1.1,1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class 1E Distribution System shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, indicated power availability, and
b. Demonstrated OPERABLE at least once per 18 months during shutdown by transferring the unit power supply from the normal circuit to each of the alternate circuits.

4.8.1.1.2 Each standby diesel generator shall be demonstrated OPERABLE: WOU

a. At least once per 31 days inescordance w% the frequency cpecified in Tab!c 4r84-on a STAGGERED TEST BASIS by:
1) Verifying the fuel level in its associated fuel tank,
2) Verifying the diesel starts from standby condition and accelerates to 600 rpm (nominal) in less than or equal to 10 seconds W The generator voltage and frequency shall be 4160
  • 416 volts and 60 1.2 Hz within 10 secondsW after the start signal. The diesel generator shall be started for this test by using one of the following signals:

a) Manual, or l

b) Simulated loss-of-offsite power by itself, or c) Simulated loss-of-offsite power in conjunction with a Safety injection test signal, or d) A Safety injection test signal by itself.  ;

3) Verifying the generator is synchronized, loaded to 5000 to 5500 kW, and operates with a load of 5000 to 5500 kW for at least 60 minutes,
  • and
4) Verifying the standby diesel generator is aligned to provide standby power to the associated emergency busses.
b. At least once per 31 days and after each opecation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> by checking for and removing accumulated water from its associated fuel tank;
c. Maintain properties of new and stored fuel oil in accordance with the Fuel Oil Monitoring Program.

SOUTH TEXAS - UNITS 1 & 2 3/4 8-3 Unit 1 - Amendment No. 68,85 Unit 2 - Amendment No. 67,72

0 NOC-AE-000629 Attachment 5 Page 5 of 7 ELECTRICAi. POWER SYSTEMS SURVEILLANCE REOUIREMENTS (Continued)

13) Demonstrating the OPERABILITY of the automatic load shed bypass and the manual load shed reinstatement features of the load sequencer.
f. At least once per 10 years or after any modifications which could affect standby diesel generator interdependence by starting all standby diesel generators simultaneously, during shutdown, and verifying that all standby diesel generators accelerate to at least 600 rpm in less than or equal to 10 seconds; and
g. At least once per 10 years by draining each fuel tank, removing the accumulated sediment and cleaning the tank.

4.8.1.1.3 (Not used) 90ced: ^'! ctandby diccc! generator fai!urce, v !!d er nonve!!d, cha!! be repcded te4he4cmmicc!cn in a Specie! 90pon purcuent to Specification 6.9.2 v'" Sin 30 days, 9 pede of ctendby diccc! generator fe!!urec che!! include the informatica recommended in Regu!:ter/ Pec!!!cn C 3.b cf 90ge!:torf Guide 1.108, Revicion 1, Auguct 197' 'f the number of fe!!urec 11 the !: t 100 va!!d tect: (en a per auc! car unit bac!c) ic greater *han er equa' to,77 the repcd che!! be cupplemented to inc!ude the edditione! ni formation recommended ir 90gu!: tory om.e a..re.m, n..a ..s .a. o..~ . .a..-.m.m,,

. .. . . . n ... a.u. 4 4. n..o , o.m. :_:m..m.

... 4.,.a. m,...... 4. nv. ..

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1 SOUTH TEXAS - UNITS 1 & 2 3/4 8-6 Unit 1 - Amendment No. 68; 102 !

Unit 2 - Amendment No. 67,89 j i

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.C NOC-AE-000629 i Attachment 5 Page 6 of 7 i TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE (Not used)

NUS' ER OF FA.! LURES IN NU'.'9ER OF FA! LURES IN i .a..er. o.n. u. .n.a

. ... .in r. e..cr. .em i A er. 4.n.n. u. n.e .. i.n r. .e.cr. .em r. e.

. .c t. r o..c. n, i.ic

. e.. . v.

l c* c4 Once per 31 d y:

l s .o.m -

se

n. m.. ._,. .,m. ,. y am,...

SPECIFICATION NOTATIONS W Loss of one 13.8 kV Standby Bus to 4.16 kV ESF bus line constitutes loss of one offsite source. Loss of two 13.8 kV Standby busses to 4.16 kV ESF bus lines constitutes loss of two offsite sources.

  • All diesel generator starts for the purpose of these surveillances may be preceded by a ,

i prelube period. l l- 4

  • A diesel generator start in less than or equal to 10 seconds (fast start) shall be j performed every 184 days. All other diesel generator starts for the purpose of this _

surveillance may be modified starts involving reduced fuel (load limit) and/or idling and  !

gradual acceleration to synchronous speed.-

W Generator Icading may be accomplished in accordance with vendor recommendations, l including a warmup period prior to loading.

l

  • The diesel generator start for this surveillance may be a modified start (see SR 4.8.1.1.2a.2)).

l

  • Momentary transients outside this load range due to changing conditions on the grid I

shall not invalidate the test.

M If Specification 4.8.1.1.2a.2) is not satisfactorily completed, it is not necessary to repeat the preceding 24-hour test. Instead, the standby diesel generator may be operated at 5000-5500 kW for a minimum of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or until operating temperature has stabilized.

W (Not used) Critet for 6t:W ng n=ber Of f:!!ure: =d n=ber c' ve!!d tect che!! be 2

^^^rtn= :"5 R:;e!:t: j P :it!= C.2.e of .cge!:terj Ge!t *.108, but 6t:W=d

= per d!-  ! g= reter 5:6.

FC: the pe pee: Of 6t:W^5g the required teet 'r ge=0y, the prev! e t=t f:!!ere

_.._.o, w. .-a. _a .m.. ..m. u. _ .,.i . a.: ._.i~ - w...i.. n.u..m._.. _ ..a.a.im... i.,.

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. - _ _ :ama

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. .... .w.

. ~. - .w . . .i.. ., .i.. _.

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, , .a,

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_ =d to:t!~g, !: p^^"!=!!y :pproved by the =n teterer =d if :=0pt:b!: re!!:b!!!!y het been t==tr:t:d. The r:M25!!bj eriteri= ehe!! be 'he =^ ::-'e! = p!:t!= cf 14

^^ :::"'fr: ? h : :!n;!: =r!=. T= Of th = !=t: 05:!! be M :^^^r&=^ rf !" the

( r^ "?! = * = "!: n ^^ R e q u!re = nt:

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SOUTH TEXAS - UNITS 1 & 2' 3/4 8-7 Unit 1 - Amendment No. 68 l Unit 2 - Amendment No. 57 l

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o NOC-AE-000629 Attachment 5 i Page 7 of 7 SPECIFICATION NOTATIONS (Continued) 48AA2&2-and484A2a.3 cnd four tect:in accordance-wdh the 1SA dcy tecting vy i . .m. .m.. s.. m.e. e m

.mm_.im. . w. ..,:.n ,, m.m., o. my

.. m.

1,m. . ...m,,m..,. .oa . 4 4. . o_., o .,, m.a a vo. 4. 4 .o. , o., . n .wi..e ~. ;.m. ,1. 3g

- .m .. . 1 ... . . . .

1. m,.

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.. am.,.

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,,.m.. .im., .m,.e. .m. .,.. ,. _ ,. s. m.

. e. ,,i . m. . .m..e

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.. . ,, ~. .;.m, . , sm,,

. , . . .m..s,a_4e

. . . ,, i .. m, . s. .m,. s. , .a.. m m _,,m,.m. .... .m. _ m, , . m. .,m,,.. .a.. ,~. u. , o. n.ry _,,.,,m. m. .,,, ,. .

M (Not used)

T. w. .o,, _,,. ,m. ...~,.,i . -a 4est i. .m.m_m,. , . n..m,, ,c,h. ..a.. .A,m,, . .. m.

. ...,.,.i m.,.,.. a..e.m.,m. ,. ,_~.,.,.m,,,s

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,r,. a. m.. .m. .m.,a_ .x.,,,

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h..a m. s.,

. , . ....- n. ,m.ai.anma

. . .m m.n. .m.

U) This test may be performed during power operation provided that the other two diesel generators are operable.

04 Credit may be taken for events that satisfy any of these Surveillance Requirements.

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SOUTH TEXAS - UNIT 1 & 2 3/4 8-8 Unit 1 - Amendment No. 68,84,85 Unit 2 - Amendment No. 67,70,72 b

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. NOC-AE-000629 l Attachment 6 Page 1 of 3 I

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ATTACHMENT 6 l

ANNOTATED BASES PAGES

NOC-AE-000629 Attachment 6 Page 2 of 3 Annotated Bases Pages The following Bases pages are annotated with changes. Additions are indicated with bold type,

~ deletions are designated by line through and are indicated by change bars in the right hand column.

Page B 3/4 8-7 i

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, NOC-AE-000629 Attachment 6 Page 3 of 3 ELECTRICAL POWER SYSTEMS EASES A.C. SOURCES. D.C. SOURCES, and ONSITE POWER DISTRIBUTION (Continued)

For purposes of this testing, the DGs are started from standby conditions. Standby condition for a DG mean that the diesel engine coolant and oil are being continuously circulated and temperature is being maintained consistent with manufacturer recommendations.

In order to reduce stress and wear on diesel engines, some manufacturers recommend a modified start in which the starting speed of DGs is limited, warmup is limited to this lower speed, and the DGs are gradually accelerated to synchronous speed prior to loading. In addition, the modified start may involve reduced fuel (load limit). These start procedures are the intent of Note 3, which is only applicable when such modified start procedures are recommended by the manufacturer.

Once per 184 days the DG starts from standby conditions and achieves required voltage and frequency within 10 seconds. The 10 second start requirement supports the assumptions of the design basis LOCA analysis in the FSAR.

The 10 second start requirement is not applicable (see Note 3) when a modified start procedure as described above is used.

The normal 31 day Frequency for SR 4.8.1.1.2.a 3.8.1.2 (ccc Tab!c A.8-1, "Dicco! Generator Test 4chedu!c," in the cocompanying4.GO)is consistent with Regulatory Guide 1.108 and Generic Letter 94-01. The 184 day Frequency in Note 3 is a reduction in cold testing consistent with Generic Letter 84-15. These Frequencies provide adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testing.

SR 4.8.1.1.2.a.3 This Surveillance verifies that the DGs are capable of synchronizing with the offsite electrical system and accepting loads greater than or equal to the equivalent of the maximum expected accident loads. A minimum run time of 60 minutes is required to stabilize engine temperature, while minimizing the time that the DG is connected to the offsite source.

The load band is provided to avoid routine overloading of the DG. Routine overloading may result in more frequent teardown inspections in accordance with vendor recommendations in order to maintain DG OPERABILITY.

This SR is modified by two Notes. Note 4 indicates that diesel engine runs for this Surveillance n'ay include gradual loading, as recommended by the manufacturer, so that mechanical stress 1 i

and wear on the diesel engine are minimized. Note 6 states that momentary transients, because of changing bus loads, do not invalidate this test. I A successful DG start under SR 4.8.1.1.2.a.2 must precede this test to credit satisfactory performance.

l SOUTH TEXAS - UNITS 1 & 2 B 3/4 8-7 Unit I - Amenoment No.68 I Unit 2 - Amendment No.57 {

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. NOC-AE-000629 Attachment 7 Page 1 of 8 i

l ATTACHMENT 7 l TECHNICAL SPECIFICATION AND BASES PAGES WITH PROPOSED CHANGES INCORPORATED i

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. NOC-AE-000629 Attachment 7 Page 2 of 8 Technical Specification and Bases Pages with Proposed Changes Incorporated The following Technical Specification and Bases pages, which incorporate the proposed changes in Attachments 5 and 6, are provided for NRC use in review of this submittal.

Index page x (Page 3 of 8)

Page 3/4 8-3 (Page 4 of 8) ,

Page 3/4 8-6 (Page 5 of 8)

Page 3/4 8 (Page 6 of 8)

Page 3/4 8-8 (Page 7 of 8)'

Page B 3/4 8-7 (Page 8 of 8) l i

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INDEX LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS SECTION PAGE 3/4.8 ELECTRICAL POWER SYSTEMS '

3/4.8.1 A.C. SOURCES Operating 3/4 8-1 TABLE 4.81 (This table number not used) 3/4 8-8 l Shutdown 3/4 8-9 3/4.8.2 D.C. SOURCES Operating 3/4 8-10 TABLE 4.8-2 BATTERY SURVEILLANCE REQUIREMENTS 3/4 8-12 Shutdown 3/4 8-13 3/4.8.3 ONSITE POWER DISTRIBUTION Operating 3/4 8-14 Shutdown 3/4 8-16 3/4.8.4 ELECTRICAL EQUIPMENT PROTECTIVE DEVICES Containment Penetration Conductor l Overcurrent Protective Devices 3/4 8-17 3/4.9 REFUELING OPERATIONS' l' 3/4.9.1 BORON CONCENTRATION 3/49-1 3/4.9.2 INSTRUMENTATION 3/49-2 3/4.9.3 DECAY TIME 3/4 9-3 )

3/4.9.4 CONTAINMENT BUILDING PENETRATIONS 3/49-4 3/4.9.5 COMMUNICATIONS 3/49-5 3/4.9.6 REFUELING MACHINE 3/4 9-6 3/4.9.7- CRANE TRAVEL - FUEL HANDLING BUILDING 3/4 9-7

-3/4.9.8 RESIDUAL HEAT REMOVAL AND COOLANT CIRCULATION High Water Level 3/49-8 Low Water Level 3/49-9 3/4.9.9 CONTAINMENT VENTILATION ISOLATION 3/4 9-10 SYSTEM 3/4.9.10- WATER LEVEL - REFUELING CAVITY 3/4 9-11 SOUTH TEXAS - UNITS 1 & 2 x l

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1 ELECTRICAL POWER SYSTEMS l SURVEILLANCE REQUIREMENTS 1

4.8.1.1.1 Each of the above required independent circuits between the offsite transmission {

network and the Onsite Class 1E Distribution System shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker I alignments, indicated power availability, and  :
b. Demonstrated OPERABLE at least once per 18 months during shutdown by -

transferring the unit power supply from the normal circuit to each of the alternate

{

circuits.

l 4.8.1.1.2 Each standby diesel generator shall be demonstrated OPERABLE: (2xu);

a. At least once per 31 days on a STAGGERED TEST BASIS by:

1

1) Verifying the fuel level in its associated fuel tank,
2) Verifying the diesel starts from standby condition and accelerates to 600 rpm (nominal) in less than or equal to 10 seconds.(') The generator voltage and frequency shall be 41601416 volts and 60 1.2 Hz within 10 seconds ( ) after the start signal. The diesel generator shall be started for this test by using one of the following signals:

a) Manual, or b) Simulated loss-of-offsite power by itself, or c) Simulated loss-of-offsite power in conjunction with a safety injection test l signal, or I d) A Safety injection test signal by itself.

3) Verifying the generator is synchronized, loaded to 5000 to 5500kW, and operates with a load of 5000 to 5500 kW for at least 60 minutes," and
4) Verifying the standby diesel generator is aligned to provide standby power to the associated emergency busses,
b. At least once per 31 ciays and after each operation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> by checking for and removing accumulated water from its associated fuel tank;
c. Maintain properties of new and stored fuel oil in accordance with the Fuel Oil Monitoring Program.

SOUTH TEXAS - UNITS 1 & 2 3/4 8-3 Unit 1 - Amendment No.

Unit 2 - Amendment No

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l ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

13) - Demonstrating the OPERABILITY of the automatic load shed bypass and the manual load shed reinstatement features of the load sequencer,
f. At least once per 10 years or after any modifications which could affect standby diesel generator interdependence by starting all standby diesel generators simultaneously, during shutdown, and verifying that all standby diesel generators accelerate to at least 600 rpm in less than or equal to 10 seconds; and
g. At least once per 10 years by draining each fuel tank, removing the accumulated sediment and cleaning the tank.

4.8.1.1.3 (Not used) l SOUTH TEXAS - UNITS 1 & 2 3/4 8-6 Unit 1 - Amendment No. ,

Unit 2 - Amendment No.

TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE (Not used)

SPECIFICATION NOTATIONS

") Loss of one 13.8 kV Standby Bus to 4.16 KV ESF bus line constitutes loss of one offsite source. Loss of two 13.8 kV Standby busses to 4.16 kV ESF bus lines constitutes loss of two offsite sources.

(2)

All diesel generator starts for the purpose of these surveillances may be preceded by a prelube period.

() A diesel generator start in less than or equal to 10 seconds (fast start) shall be performed every 184 6ays. All other diesel generator starts for the purpose of this surveillance may be modified starts involving reduced fuel (load limit) and/or idling and gradual accelerXion to synchronous speed.

W Generator loading may be accomplished in accordance with vendor recommendations, including a warmup period prior to loading.

  • The diesel generator start for this surveillance may be a modified start (see SR 4.8.1.1.2a.2)).
  • Momentary transients outside this load range due to changing conditions on the grid shall not invalidate the test.

W If Specification 4.8.1.1.2a.2) is not satisfactorily completed, it is not necessary to repeat the preceding 24-hour test. Instead, the standby diesel generator may be operated at 5000-5500 kW for a minimum of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or until operating temperature has stabilized.

W (Not used)

  • (Not used)
0) This test may be performed during power operation provided that the other two diesel generators are operable.

-("I Credit may be taken for events that satisfy any of these Surveillance Requirements.

SOUTH TEXAS - UNITS 1 & 2 3/4 8-7 Unit 1 - Amendment No.

Unit 2 - Amendment No.

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1 i THIS PAGE IS INTENTIONALLY BLANK l

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l l l 1-1 l' SOUTH TEXAS - UNITS 1 a 2 3/4 8-8 Unit 1 Amendment No.

Unit 2 - Amendment No.

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ELECTRICAL POWER SYSTEMS

. , l BASES l A.C. SOURCES. D.C. SOURCES. and ONSITE POWER DISTRIBUTION (Continued)

For purposes of this testing, the DGs are started from standby conditions. Standby condition for a DG mean that the diesel engine coolant and oil are being continuously circulated and  :

temperature is being maintained consistent with manufacturer recommendations.  !

In order to reduce stress and wear on diesel engines, some manufacturers recommend a j modified start in which the starting speed of DGs is limited, warmup is limited to this lower I speed, and the DGs are gradually accelerated to synchronous speed prior to loading. In addition, the modified start may involve reduced fuel (load limit). These start procedures are the  ;

intent of Note 3, which is only applicable when such modified start procedures are  !

recommended by the manufacturer. i 1

Once per 184 days the DG starts from standby conditions and achieves required voltage and frequency within 10 seconds. The 10 second start requirement supports the assumptions of the l design basis LOCA analysis in the FSAR. i The 10 second start requirement is not applicable (see Note 3) when a modified start procedure as described above is used.

The normal 31 day Frequency for SR 4.8.1.1.2.a is consistent with Regulatory Guide 1.108 and Generic Letter 94-01. The 184 day Frequency in Note 3 is a reduction in cold testing consistent with Generic Letter 84-15. These Frequencies provide adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testing.

SR 4.8.1.1.2.a.3 This Surveillance verifies that the DGs are capable of synchronizing with the offsite electrical system and accepting loads greater than or equal to the equivalent of the maximum expected accident loads. A minimum run time of 60 minutes is required to stabilize engine temperature, while minimizing the time that the DG is connected to the offsite source.

The load band is provided to avoid routine overloading of the DG. Routine overloading may result in more frequent teardown inspections in accordance with vendor recommendations in order to maintain DG OPERABILITY.

This SR is modified by two Notes. Note 4 indicates that diesel engine runs for this Surveillance may include gradual loading, as recommended by the t .anufacturer, so that mechanical stress and wear on the diesel engine are minimized. Note 6 states that momentary transients, because of changing bus loads, do not invalidate this test.

A successful DG start under SR 4.8.1.1.2.a.2 must precede this test to credit satisfactory performance.

SOUTH TEXAS - UNITS 1 & 2 B/3/4 8-7 Unit I- Amendment No.

Unit 2 - Amendment No.

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