Text

Proposed Tech Specs,Revising Surveillance Requirements for Plant Operation W/Inoperable Diesel Generator
	ML20149G243
Person / Time
Site:	Browns Ferry
Issue date:	10/07/1994
From:	; TENNESSEE VALLEY AUTHORITY
To:	;
Shared Package
ML20149G241	List: ML20149G239; ML20149G243;
References
	NUDOCS 9410200026
	Download: ML20149G243 (21)
	v • d • e

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' ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNITS 1, 2 AND 3 PROPOSED TECHNICAL SPECIFICATION (TS) CHANGE TS-351 MARKED PAGES I. AFFECTED PAGE LIST Unit 1 Unit 2 Unit 3 3.9/4.9-9 3.9/4.9-9 3.9/4.9-8 3.9/4.9-21 3.9/4.9-21 3.9/4.9-20~

II. MARKED PAGES See attached.

9410200026 DR 941007 ADOCK 05000259 PDR

r-n . ... -

NOV 18198t

. 3.9/4.9 AttrTr.rAny wr.nevnf dAT. SYSTEM

'LIMITkNGCONDITIONSFOROPERATION SURVEILLANCE REQUIREMENT 5

^ 3.9.B. Oneration With Inonerable 4.9.3. Oneration With inanerable ZauinafuLt Eauinment _

3. When one of the units 1- 3. When one of the and 7 diesel generator is unita 1 and 2 diesel s

NOPE M continued generators is found EgAuxvm POWER OPERATION to be INOPERABLE, b "'F pemissible turing the all of the remaining ca5( succeeding 7 days, diesel generators provided,that 2 offsite shall be demonstrated power sources are to be OPERABLE within .

available as specified 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , and power in 3.9.A.1.c and all of availability for the the CS, EHR (LPCI and associated boards i containment cooling) shall be verified systems, and the remaining within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and-three units 1 and 2 diesel at least once per

, generators are OPEDARTR. 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

If this requirement cannot ,

be met, an orderly __

shutdown shall be '

initiated and the reactor shall be in the COLD Delete and rep lace sauTDOWN CONDITION within with attached insert 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . ,

e -

4. When one units 1 and 2 4. When one 4-kV 4-kV =hntdown board is shutdown board is (TWDPERABLE b ontinued to be B0 , all

/ EEAwava POWER OPERATION is permissible for a period aisesi senerators Zow<- of 5 days provided that g associated with the c ,.y 2 offsite power sources remaining 4-kV shutdown are available as cceft boards shall be demon-specified in 3.9.A.1.c strated to be OPERABLE i and the remaining 4-kV within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , and i shutdown boards and power availability for associated diesel the remaining 4-kV generators, CS, RER (LPCI shutdown boards shall ,

and containment cooling) be verified within :

systems, and all 480-V 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least emergency power boards once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months are OPERABLE. If this tharsafter.

requirement cannot be met, an orderly shutdown !

l shall be initiated and .

the reactor shall be in !

the COLD SHUTDOWN CONDITION within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

I r

.BrN 3.9/4.9-9 AMENDMENT NO.15 8 Unit 1 ,

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Unit 1, TS page 3.9/4.9-9, Surveillance Requirement 4.9.B.3.

l When one of the Units 1 and 2 diesel generators is inoperable, power availability for the associated boards shall be verified within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least ;

once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

AIld Determine. OPERABLE Units 1 and 2 diesel generators are not inoperable due to common cause-failure within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Dr The remaining Units 1 and 2 diesel generators shall be demonstrated to be OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

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. '3.9 BASES (Cont'd)

MAR 0 91994 Specification 3.9.D provides the OPERABILITT requirements for emergency diesel generator power sources for the plant shared systems of standby gas ,

treatment and control room emergency ventilation. This specification :

addresses the condition where one or more of the units is in cold shutdown, refueling, or is defueled, by requiring the diesel generators aligned to the shared syste=s to be OPERABLE when any of the BFN Units require OPERABILITT of the shared systems. The allowed out-of-service I

time of 30 days for the diesel generator aligned to the shared systems is commensurate with the importance of the affected systems when a unit is in cold shutdown, refueling, or is defueled; considers the low probability of a LOCA/ Loss of offsite power in these conditions; and considers the availability of onsite power to redundant trains.

4.9 BASES The monthly test of the diesel generators is primarily to check for failures and deterioration in the system since last use. The diesels will be loaded to at least 100 percent of its continuous rating (i.e., 1 2600 KW) while engine and generator temperatures are stabilized (about one hour). A minimum 75-percent load vill prevent soot formation in the cylinders and injection nozzles. Operation up to an equilibrium temperature ensures that there is no overheating problem. The tests also provide an engine and generator operating history to be compared with subsequent engine-generator test data to identify and to correct any mechanical or electrical deficiency before it can result in a system failure.

A j Diesel testing once per 18 months (i.e., at least once per fuel cycle) at N#W a minimum load of 2800 KW for an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , assures that each diesel generator vill be capable of supplying the j j f N e<#/4 maximum load during the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of a loss of offsite pover/ loss of coolant accident. This test also demonstrates each diesel generator's long-term load carrying capability.

The test during refueling outages is more comprehensive, including procedures that are most effectively conducted at that time. These include automatic actuation and functional capability tests to verify that the generators can start and be ready to assume load in 10 seconds. The maintenance inspection vill detect any signs of wear long before failure.

BFN tests the 7-day diesel generator fuel oil supplies in accordance with Table 1 of ASTM-D975-89. Each fuel oil supply is tested quarterly.

Battery maintenance with regard to the floating charge, equalizing charge, and electrolyte level vill be based on the manufacturer's instruction and sound maintenance practices. In addition, written records vill be maintained of the battery performance. The plant batteries will deteriorate with time but precipitous failure is unlikely. The type of surveillance called for in this specification is that which has been demonstrated through experience to provide an indication of a cell becoming irregular or unserviceable long before it becomes a failure.

3.9/4.9-21 AMENDMENT NO. 2 0 3 BFN Unit 1 I

l l

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. l Unit 1, TS page 3.9/4.9-21, addition to 4.9 Bases:

The intent of Surveillance Requirement 4.9.B.3 is to ensure that all Units 1 and 2 diesel generator inoperabilities, except those inoperabilities deliberately induced for the purpose of routine testing or maintenance, are investigated for common cause failure. Deliberately making a diesel generator inoperable for routine testing or maintenance does not introduce a common cause failure. This surveillance requirement also provides an allowance to avoid unnecessary testing of otherwise OPERABLE diesel generators. If it can be determined that the cause of the inoperable diesel generator does not exist on the remaining diesel generators, then the remaining diesel generators need not be demonstrated OPERABLE.

According to Generic Letter 84-15, 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is a reasonable time to confirm the OPERABLE diesel generators are not affected by the same problem as the inoperable diesel generators.

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2.9/4 9 AUXILIARY ELECT 2ICAL SYSTEM OV 181988 LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIRIMENTS' 3.9.B. Ooeration With Inocerable 4.9.B. Ooerstion With Inocerable Eautement Eauitment

3. When one of the units 1 3. en one of the sel generator is units 1 and 2 diesel INOPERABLE continued generators is found REACTOR POWER OPERATION is to be INOPERABLE, permissible during the all of the remaining g,vgr succeeding 7 days, diesel generators

,f f provided thac 2 offsite shall be demonstrated power sources are to be OPERABLE within available as specified I, 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , and power in 3.9.A.1.c and all of availability for the }

the CS, RHR (LPCI and associated boards J containment cooling) shall be verified systems, and the remaining l within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and $(}

three units 1 and 2 diesel at least once per generators are OPERABLE. 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

If this requirement cannot __ __

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be met, an orderly shutdown shall be initiated and the reactor Delete and replace shall be in the COLD SHUTDOWN CONDITION within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . with attached insert 4 When one units 1 and 2 4. When one 4-kV A kV ahntdown board is shutdown board is INOPERAEE) ontinued found to be REACIDE POWER OPERATION NOPERABIp all is permissible for a period diesci generators 4bo over of 5 days provided that associated with the 2 offsite power sources # * ' " " remaining 4-kV C4 fl are available as C2/t shutdown boards shall specified in 3.9.A.1.c be demonstrated to be and the remaining 4-kV OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , shutdown boards and and power availability associated diesel for the remaining 4-kV generators, CS, RHR (LPCI shutdown boards and containment cooling) shall be verified systems, and all 480-V within 1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and emergency power boards at least once per are OPERABLE. If this 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

requirement cannot be met, an orderly shutdown shall be initiated and the reactor shall be in the COLD SHUTDOWN CONDITION within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

BrN 3.9/4.9_9 $ENDMEM NO.15 4 Unit 2

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Unit'2, TS page 3.9/4.9-9, Surveillance Requirement 4.9.B.3.

When one of the Units 1 and 2 diesel generators is inoperable, power availability for the associated boards shall be verified within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

And Determine OPERABLE Units 1 and 2 diesel generators are not inoperable due to common cause failure within.

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

9I The remaining Units 1 and 2 diesel generators shall be demonstrated to be OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

1'

I 3.9* BASES (Cont'd) MAR 0 91994 require OPERABILITY of the shared systems. The allowed out-of-service time of 30 days for the diesel generator aligned to the shared systems l

is commensurate with the importance of the affected systems when a unit l j is in cold shutdown, refueling, or is defueled; considers the low !

l probability of a LOCA/ Loss of offsite power in these conditions; and f cor_siders the availability of onsite power to redundant trains. {

4.9 BASES The monthly tests of the diesel generators are primarily to check for ;

failures and deterioration in the system since last use. The diesels {

will be loaded to at ~.e.et 100 percent of its continuous rating (i.e., y 2600 KW) while engine and generator temperatures are stabilized (about one hour). A minimum 75-percent load will prevent soot formation in the cylinders and injection nozzles. Operation up to an equilibrium J temperature ensures that there is no overheating problem. The tests also provide an engine and generator operating history to be compared with subsequent engine-generator test data to identify and to correct any mechanical or electrical deficiency before it can result in a system failure.

d Diesel testing once per 18 months (i.e., at least once per fuel cycle)

.~ Tiff,-[ I at a minimum load of 2800 KW for an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months f

/Mc// assures that each diesel generator will be capable of supplying the maximum load during the first 2 hc.urs of a loss of offsite power / loss of coolant accident. This test also demonstrates each diesel generator's long-term load carrying capability.

The test during refueling outages is more comprehensive, including procedures that are most effectively conducted at that time. These include automatic actuation and functional capability tests to verify that the generators can start and be ready to assume load in 10 seconds. The maintenance inspection will detect any signs of wear long before failure.

BTN tests the 7-day diesel generator fuel oil supplies in accordance with Table 1 of ASTM-D975-89. Each fuel oil supply is tested quarterly.

Battery maintenance with regard to the floating charge, equalizing charge, and electrolyte level will be based on the manufacturer's instruction and sound maintenance practices. Tu addition, written records will be maintained of the battery performance. The plant batteries will deteriorate with time but precipitous failure is unlikely. The type of surveillance calicd fo: in this specification is that which has been demonstrated through experience to provide an indication of a cell becoming irregular or unserviceable long before it becomes a failure.

The equalizing charge, as recommended by the manufacturer, is vital to maintaining the ampere-hour capacity of the battery and will be applied as recommended, AMENDMEfR NO. 2 2 2 BFN 3.9/4.9-21 Unit 2

Unit 2, TS page 3.9/4.9-21, addition to 4.9 Bases:

t The intent of Surveillance Requirement 4.9.B.3 is to ensure that all Units 1 and 2 diesel generator inoperabilities, except those inoperabilities deliberately induced for the purpose of routine testing or maintenance, are investigated for common cause failure. Deliberatt.ly making a diesel generator inoperable for routine te sting or maintenance does not introduce a common cause' failure. This surveillance requirement also provide s an allowance to avoid unnecessary testing of otherwise OPERABLE diesel generators. If it can be determined that the cause of the inoperable diesel generator does not exist on the remaining diesel generators, then the remaining diesel l generators need not be demonstrated OPERABLE. .('

According to Generic Letter 84-15, 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is a reasonable time to confirm the OPERABLE diesel generators are not affected by the same problem as the inoperable diesel generators.

1 u- _ _ _ _ _ _ _ _ _ _ _ _ _ - . _ ______ _ _ _ _ _ ______________________m_ _ _ _ _ _ _ - _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ . ___ _ __ _ _________-__ _ _ - _ _ - .

3.9 4.9 ATTITLTARY PLPCTRIf*AL SYSTEM h LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.9.B. Oneration with Inocerable 4.9.B. Oneration with Inocerable Eau 1Dment Eauinment Whenever the reactor is in STARTUP mode or EUN mode and not in a Cold Condition, the availability of electric power shall be as specified )

in 3.9.A except as specified l

herein.

From and after the date 1. When only one 1.

that only one offsite offsite power source

- power source is available, is OPERARf2, all unit 3 reactor operation is diesel generators must permissible under this be demonstrated to be l condition for seven days. OPERARf2 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , and power availability for the associated boards shall be verified within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. ,

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2. When one unit 3 diesel 2. When one unit 3 diesel generator (3A, 3B, 3C, generator is found to be or 3D) is inoperable, inoperable, all of the continued reactor operation remaining unit 3 diesel is permissible during the generators shall be succeeding 7 days, provided demonstrated to be that two offsite power OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , sources are available as and power availability for specified in 3.9.A.1.c. the associated boards and all of the CS, SHE shall be verified within (LPCI and containment 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once cooling) systems, and the per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

remaining three unit 3 diesel generators are OPERABLE. If this require-ment cannot be met, an 1 I

orderly shutdown shall be initiated and the reactor Delete and replace {

shall be shut down and in with attached insert the Cold Condition within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . ,

AMENOMM NO.124 BFN 3.9/4.9-8 Unit 3

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. . 1 Unit 3, TS page 3.9/4.9-8, Surveillance Requirement 4.9.B.2.

When one of the Unit 3 diesel generators is inoperable, power availability for the associated boards shall be verified within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

And Determine OPERABLE Unit 3 diesel generators are not inoperable due to common cause failure within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Or The remaining Unit 3 diesel generators shall be demonstrated to be OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

a 4.9 EASI,3, (Cont'd) gg The monthly tests of the diesel generators are primarily to check for failures. and deterioration in the system since last use. The diesels vill be loaded to at least 100 percent of its continuous rating (i.e. 2.

2600 KW) while engine and generator temperatures are stabilized (about !

one hour). A minimum 75-percent load will prevent soot formation in the l cylinders and injection nozzles. Operation up to an equilibritan temperature ensures that there is no overheating problem. The tests also provide an engine and generator operating history to be compared with subsequent engine-generator test data to identify and to correct any mechanical or electrical deficiency before it can result in a system failure.

RM Diesel testing once per 18 months (i.e., at least once per fuel cycle) g "#4 at a minimum load of 2800 KW for an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months assures that each diesel generator vill be capable of supplying the maximum load during the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of.a loss of offsite power / loss of coolant accident. . This test also demonstrates each diesel generator's long-term load carrying capability.

The test during refueling outages is more comprehensive, including procedures that are most effectively conducted at that time. These include automatic actuation and functional capability tests to verify that the generators can start and be ready to asstane load in ,

10 seconds. The maintenance inspection vill detect any signs of wear long before failure.

l BFN tests the 7-day diesel generator fuel oil supplies in accordance I with Table 1 of ASTM-D975-89. Each fuel oil supply is tested quarterly.

Battery maintenance with regard to the floating charge, equalizing i charge, and electrolyte level vill be based on the manufacturer's i instruction and sound maintenance practices. In addition, written I records vill be maintained of the battery performance. The plant l batteries will deteriorate with time but precipitous failure is J unlikely. The type of surveillance called for in this specification is that which has been demonstrated through experience to provide an l indication of a cell becoming irregular or unserviceable long before it becomes a failure. 1 l

The equalizing charge, as recommended by the manufacturer, is vital to i maintaining the ampere-hour capacity of the battery and will'be applied i as recommended. ;

The testing of the logic systeu will verify the ability of the logic systems to bring the auxiliary electrical system to running standby readiness with the presence of an accident signal from any reactor or an undervoltage signal on the start buses or 4-kV shutdown boards.

The periodic simulation of accident signals in conjunction with diesel generator voltage available signals will confirm the ability of the i 480-V load shedding logic system to sequentially shed and restart 480-V loads if an accident signal vere present and diesel generator voltage vere the only source of electrical power.

BFN 3.9/4.9-20 ARENDMEIR NO. I 7 3 Unit 3

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. l Unit 3, TS page 3.9/4.9-20, addition to 4.9 Bases: l l

The intent of Surveillance Requirement 4.9.B.2 is to )

ensure that all Unit 3 diesel generator j inoperabilities, except those inoperabilities '

deliberately induced for the purpose of routine l testing or maintenance, are investigated for common I cause failure. Deliberately making a diesel generator inoperable for routine testing or maintenance does not introduce a common cause failure. This surveillance requirement also provides an allowance to avoid unnecessary testing of otherwise OPERABLE diesel generators. If it can be determined that the cause of the inoperable diesel generator does not exist on the remaining diesel generators, then the remaining diesel generators need not be demonstrated OPERABLE.

According to Generic Letter 84-15, 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is a reasonable time to confirm the OPERABLE diesel generators are not affected by the same problem as the inoperable diesel generators.

I 6

ENCLOSURE 3 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNITS 1, 2 AND 3 PROPOSED TECHNICAL SPECIFICATION (TS) CHANGE TS-351 REVISED PAGES I. AFFECTED PAGE LIST pnit 1 Unit 2 Unit 3 3.9/4.9-9 3.9/4.9-9 3.9/4.9-8 3.9/4.9-21 3.9/4.9-21 3.9/4.9-20 3.9/4.9-22 3.9/4.9-22 3.9/4.9-21 II. REVISED PAGES See attached.

1

a 3:9/4.9' AUXILIARY ELECTRICAL SYSTEM LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.9.B. Operation With Inoperable 4.9.B. Operation With Inoperable Eauipment Eauipment

3. When one of the units 1 3. When one of the units and 2 diesel generator is 1 and 2 diesel inoperable, continued generators is l

REACTOR POWER OPERATION inoperable, power permissible during the availability for the succeeding 7 days, associated boards shall provided that 2 offsite be verified within 1 power sources are hour and at least once available as specified per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

in 3.9.A.l.c and all of the CS, RHR (LPCI and Ansi containment cooling) systems, and the remaining Determine OPERABLE three units 1 and 2 diesel units 1 and 2 diesel generators are OPERABLE. generators are not If this requirement cannot inoperable due to common be met, an orderly cause failure within 24 shutdown shall be hours.

initiated and the reactor shall be in the COLD Or SHUTDOWN CONDITION within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . The remaining units 1 and 2 diesel generators

4. When one units 1 and 2 shall be demonstrated 4-kV shutdown board is to be OPERABLE within inoperable, continued 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

l REACTOR POWER OPERATION is permissible for a period 4. When one 4-kV of 5 days provided that shutdown board is 2 offsite power sources found to be

. are available as inoperable, all l specified in 3.9.A.l.c diesel generators and the remaining 4-kV associated with the l

shutdown boards and remaining 4-kV shutdown boards shall associated diesel generators, CS, RHR (LPCI be demonstrated to be and containment cooling) OPERABLE within 24 systems, and all 480-V hours, and power emergency power boards availability for are OPERABLE. If this the remaining 4-kV requirement cannot be shutdown boards shall met, an orderly shutdown be verified within shall be initiated and 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least the reactor shall be in once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months the COLD SHUTDOWN thereafter.

CONDITION within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

BFN 3.9/4.9-9 Unit 1

3.9 %ASES (Cont'd)

Specification 3.9.D provides the OPERABILITY requirements for emergency diesel generator power sources for the plant shared systems of standby gas treatment and control room emergency ventilation. This specification addresses the condition where one or more of the units is in cold shutdown, refueling, or is defueled, by requiring the diesel generators aligned to the shared systems to be OPERABLE when any of the BFN Units require OPERABILITY of the shared systems. The allowed out-of-service time of 30 days for the diesel generator aligned to the shared systems is commensurate with the importance of the affected systems when a unit is in cold shutdown, refueling, or is defueled; considers the low probability of a LOCA/ Loss of offsite power in these conditions; and considers the availability of onsite power to redundant trains.

4.9 BASES The monthly test of the diesel generators is primarily to check for failures and deterioration in the system since last use. The diesels will be loaded to at least 100 percent of its continuous rating (i.e., 1 2600 KW) while engine and generator temperatures are stabilized (about one hour). A minimum 75-percent load will prevent soot formation in the cylinders and injection nozzles. Operation up to an equilibrium temperature ensures that there is no overheating problem. The tests also provide an engine and generator operating history to be compared with subsequent engine-generator test data to identify and to correct any mechanical or electrical deficiency before it can result in a system failure.

The intent of Surveillance Requirement 4.9.B.3 is to ensure that all Units 1 and 2 diesel generator inoperabilities, except those inoperabilities deliberately induced for the purpose of routine testing or maintenance, are investigated for common cause failure. Deliberately making a diesel generator inoperable for routine testing or maintenance does not introduce a common cause failure. This surveillance requirement also provides an allowance to avoid unnecessary testing of otherwise OPERABLE diesel generators. If it can be determined that the cause of the inoperable diesel generator does not exist on the remaining diesel generators, then the remaining diesel generators need not be demonstrated OPERABLE. According to Generic Letter 84-15, 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is a reasonable time to confirm the OPERABLE diesel generators are not affected by the same problem as the inoperable diesel generators.

Diesel testing once per 18 months (i.e., at least once per fuel cycle) at a minimum load of 2800 KW for an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , assures that each diesel generator will be capable of supplying the maximum load during the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of a loss of offsite power / loss of coolant accident. This test also demonstrates each diesel generator's long-term load carrying capability.

1 The test during refueling outages is more comprehensive, including procedures that are most effectively conducted at that time. These i include automatic actuation and functional capability tests to verify l l

l that the generators can start and be ready to assume load in 10 seconds.

The maintenance inspection will detect any signs of wear long before failure.

DFN 3.9/4.9-21 Unit 1 1

1

D e

4.9 BASES (Cont'd)

BFN tests the 7-day dielel generator fuel oil supplies in accordance with Table 1 of ASTM-D975-89. Each fuel oil supply is tested quarterly.

Battery maintenance with regard to the floating charge, equalizing charge, and electrolyte level will be based on the manufacturer's instruction and sound maintenance practices. In addition, written records will be r.aintained of the battery performance. The plant batteries will deteriorate with time but precipitous failure is unlikely. The type of surveillance called for in this specification is that which has been demonstrated through experience to provide an indicati a of a cell becoming irregular or unserviceable long before it becomes a failure.

The equalizing charge, as recommended by the manufacturer, is vital to maintaining the ampere-hour capacity of the battery and will be applied as recommended.

The testing of the logic systems will verify the ability of the logic systems to bring the auxiliary electrical system to running standby readiness with the presence of an accident signal from any reactor or an undervoltage signal on the 4-kV shutdown boards.

The periodic simulation of accident signals in conjunction with diesel generator voltage available signals will confirm the ability of the 480-V load shedding logic system to sequentially shed and restart 480-V loads if an accident signal were present, and diesel generator voltage was the only source of electrical power.

Specification 4.9.D provides surveillance requirements for Units 1, 2, and 3 diesel generator emergency power sources for the purpose of satisfying Specification 3.9.D. Testing of these power sources is intended to ensure their OPERABILITY when required to support OPERABILITY of the standby gas treatment system and/or the control room emergency ventilation system.

. REFERENCES 1

1. Normal Auxiliary Power System (BFNP FSAR Subsection 8.4)

2. Standby AC Power Supply and Distribution (BFNP FSAR Subsection 8.5)

3. 250-V DC Power Supply and Distribution (BFNP FSAR Subsection 8.6) 4 Memorandum from Gene M. Wilhoite to H. J. Green dated December 4, 1981 (LOO 811208 664) and memorandum from C. E. Winn to H. J. Green dated January 10, 1983 (G02 830112 002) l BFN 3.9/4.9-22 l Unit 3

3 '. 9 /4 . 9' AUXILIARY ELECTRICAL SYSTEM l i

LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.9.B. Operation With Inocerable 4.9.B. Operation With Inocerable l Eauipment Eauipment !

l

3. When one of the units 1 3. When one of the units l and 2 diesel generator is 1 and 2 diesel inoperable, continued generators is l

REACTOR POWER OPERATION is inoperable, power permissible during the availability for the succeeding 7 days, associated boards provided that 2 offsite shall be verified power sources are within I hour and at available as specified least once per 8 in 3.9.A.I.c and all of hours thereafter.

the CS, RHR (LPCI and containment cooling) And systems, and the remaining three units 1 and 2 diesel Determine OPERABLE

( generators are OPERABLE. units 1 and 2 diesel l If this requirement cannot generators are not be met, an orderly inoperable due to shutdown shall be common cause failure initiated and the reactor within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

shall be in the COLD SHUTDOWN CONDITION within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . Or

4. When one units 1 and 2 The remaining units 1 4-kV shutdown board is and 2 diesel generators j inoperable, continued shall be demonstrated REACTOR POWER OPERATION to be OPERABLE within is permissible for a. period 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , cf 5 days provided that 2 offsite power sources 4. When one 4-kV are available as shutdown board is

. specified in 3.9.A.l.c found to be and the remaining 4-kV inoperable, all l shutdown boards and diesel generators associated diesel associated with the generators, CS, RHR (LPCI remaining 4-kV and containment cooling) shutdown boards shall

systems, and all 480-V be demonstrated to be l emergency power boards OPERABLE within 24 are OPERABLE. If this hours, and power requirement cannot be availability for the met, an orderly shutdown remaining 4-kV shall be initiated and shutdown boards shall the reactor shall be in be verified within 1 the COLD SHUTDOWN hours and at least CONDITION within 24 once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months hours. thereafter.

BFN 3.9/4.9-9 Unit 2

.: + i

?-

]

~ 3.9 , gA&E1 (Cont'd) l require OPERABILITY of the shared systema. The allowed out-of-service )

time of 30 days for the diesel generator. aligned to'the shared systems is commensurate with the importance'of the affected systems when a unit is in cold shutdown, refueling, or is defueled; considers the low probability of a LOCA/ Loss of offsite power in these conditions; and considers the availability of onsite power to redundant trains.

4.9 3&ggi l j

The monthly tests of the d8.esel generators are primarily to check for failures and deterioration in the system since last use. The diesels ,

will_be loaded to at least 100 percent of its continuous rating (i.e., 1 >

?.600 KW) while engine and generator tLaperatures are stabilized (about one hour). A minimum 75-percent load will prevent soot fonaation in the -

cylinders and injection nozzles. Operation up to an equilibrium temperature ensures that there is no overheating problem. The tests ;

also provide an engine and generator operating history to be compared :'

with subsequent engine-generator test data to identify and to correct any mechanical or electrical-deficiency before it can result in a system ,

failure.

1 The intent of Surveillance Requirement 4.9.B.3 is to ensure that all !

Units 1 and 2 diesel generator inoperabilities, except those [

inoperabilities deliberately induced for the purpose of routine testing ;

or maintenance, are investigated for common cause failure. Deliberately I making a diesel generator inoperable for routine testing or maintenance does not introduce a common cause failure. This surveillance j requirement also provides an allowance to avoid unnecessary testing of l otherwise OPL'RABLE diesel generators. If it can be determined tha'. the

~

cause of the inoperable diesel generator does not exist on the remaining diesel generators, then the remaining diesel zenerators need not be ,

demonstrated OPERABLE. According to Generic Letter 84-15, 24' hours is a reasonable time to confirm the OPERABLE diesel generators are not affected by the same problem as the inoperable diesel generators. ,

Diesel testing once per 18 months (i.e., at least once per fuel cycle) ;

at a minimum load of 2800 KW for an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months assures that each diesel generator will be capable of supplying the l maximum load during the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of a loss of offsite power / loss of l coolant accident. This test also demonstrates each diesel generator's long-term load carrying capability.

The test during refueling outages is more comprehensive, including l procedures that are most effectively conducted at that time. These include automatic actuation and functional capability tests to verify that the generators can start and be ready to assume load in 10 seconds. The maintenance inspection will detect any signs of wear long before failure.

BFN tests the 7-day diesel generator fuel oil supplies in accordance with Table 1 of ASTM-D975-89. Each fuel oil supply is tested quarterly. l l

l BFN 3.9/4.9-21 Unit 2

o ~" .' l 1

4.'9 B'ASES (Cont'd)

. j Battery maintenance with regard to the floating charge, equalizing '

charge, and electrolyte level will be based on the manufacturer's instruction and sound maintenance practices. In addition, written records will be maintained of the battery performance. The plant batteries will deteriorate with time but precipitous failure is unlikely. The type of'survr.111ance called for in this specification is that which'has been demonstrated through experience to provide an indication of a cell becoming irregular or unserviceable long before it becomes a failure.

The equalizing charge, as recommended by the manufacturer, is vital to maintaining the ampere-hour capacity of the battery and will be applied as recommended.

The testing of the logic systems will verify the ability of the logic systems to bring the auxiliary electrical system to running standby readiness with the presence of an accident signal from any reactor or an undervoltage signal on the 4-kV shutdown boards.

The periodic simulation of accident signals in conjunction with diesel generator voltage available signals will confirm the ability of the 480-V load shedding logic system to sequentially shed and restart 480-V loads if an accident signal were present, and diesel generator voltage were the only source of electrical power.

Specification 4.9.D provides surveillance requirements for Units 1, 2, and 3 diesel generator emergency power sources for the purpose of satisfying Specification 3.9.D. Testing of-these power sources is intended to ensure their OPERABILITY when required to support OPERABILITY of the standby gas treatment syctem and/or the control room emergency ventilation system.

REFERENCES

1. Normal Auxiliary Power System (BFNP FSAR Subsection 8.4) l

. 2. Standby AC Power Supply and Distribution (BFNP FSAR Subsection 8.5)

3. 250-V DC Power Supply and Distribution (BFNP FSAR Subsection 8.6)

4. Memorandum from Gene M. Wilhoite to H. J. Green dated December 4, 1981 (LOO 811208 664) and memorandum from C. E. Winn to H. J. Green dated January 10, 3983 (G02 830112 002) l i

BFN Unit 2 3.9/4.9-22l

o l

1 .' . * ..; l l

3.9/4.9 AUXILIARY ELECTRICAL SYSTEM LIMITIfiG CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS i

3.9.B. Operation with Inocerable 4.9.B. Operation with Incoerable l Eauipment Eauipment Whenever the reactor is in i STARTUP mode or RUN mode and not in a Cold Condition, the availability of electric power shall be as specified in 3.9.A except as specified herein.

1. From and after the date 1. When only one that only one offsite offsite power source power source is available, is OPERABLE, all unit 3 reactor operation is diesel generators must permissible under this be demonstrated to be condition for seven days. OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , .

I and power availability for the associated boards shall be verified within I hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

2. When one unit 3 diesel 2. When one of the unit 3 generator (3A, 3B, 3C, diesel generators is ;

or 3D) is inoperable, inoperable, power continued reactor operation availability for the is permissible during the , associated boards shall be succeeding 7 days, provided verified within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and that two offsite power at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months sources are available as thereafter.

specified in 3.9.A.1.c.

and all of the CS, RHR l ADA

. (LPCI and containment cooling) systems, and the Determine OPERABLE unit 3 remaining three unit 3 diesel generators are not diesel generators are inoperable due to common '

OPERABLE. If this require- cause failure within 24 ment cannot be met, an hours.

orderly shutdown shall be initiated and the reactor Or shall be shut down and in the Cold Condition within The remaining unit 3 !

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . diesel generators ,

shall be demonstrated to be OPERABLE within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

BFN 3.9/4.9-8 ,

Unit 3

)

'4.9 , BASES (Cont'd)

The monthly tests of the diesel generators are primarily to check for

' failures and deterioration in the system since last use. The diesels will be loaded to at least 100 percent of its continuous rating (i.e. 1 2600 KW) while engine and generator temperatures are stabilized (about one hour). A minimum 75-percent load will prevent sont formation in the cylinders and injection nozzles. Operation up to an equilibrium temperature ensures that there is no overheating problem. The tests also provide an engine and generator operating history to be compared with subsequent engine-generator test data to identify and to correct I any mechanical or electrical deficiency before it can result in a system l failure, j The intent of Surveillance Requirement 4.9.B.2 is to ensure that all Unit 3 diesel generator inoperabilities, except those inoperabilities deliberately induced for the purpose of routine testing or maintenance, are investigated for common cause failure. Deliberately making a diesel generator inoperable for routine testing or maintenance does not introduce a common cause failure. This surveillance requirement also provides an allowance to avoid unnecessary testing of otherwise OPERABLE diesel generators. If it can be determined that the cause of the inoperable diesel generator does not exist on the remaining diesel generators, then the remaining diesel generators need not be demonstrated OPERABLE. According to Generic Letter 84-15, 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is a reasonable time to confirm the OPERABLE diesel generators are not affected by the same problem as the inoperable diesel generators.

Diesel testing once per 18 months (i.e...at least once per fuel cycle) at a minimum load of 2800 KW for an interval of not less than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months assures that each diesel generator will be capable of supplying the maximum load during the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of a loss of offsite power / loss of coolant accident. This test also demonstrates each diesel generator's long-term load carrying ~ capability.

The test during refueling outages is more comprehensive, including procedures that are most effectively conducted at that time. These include automatic actuation and functional capability tests to verify that the generators can start and be ready to assume load in 10 seconds. The maintenance inspection will detect any signs of wear long before failure.

BFN tests the 7-day diesel generator fuel oil supplies in accordance with Table 1 of ASTM-D975-89. Each fuel oil supply is tested quarterly.

Battery maintenance with regard to the floating charge, equalizing charge, and electrolyte level will be based on the manufacturer's instruction and sound maintenance practices. In addition, written records will be maintained of the battery performance. The plant batteries will deteriorate with time but precipitous failure is unlikely. The type of surveillance called for in this specification is that which has been demonstrated through experience to provide an-indication of a cell becoming irregular or unserviceable long before it l

'becomes a failure.

BFN 3.9/4.9-20 Unit 3 !

I i

I 1

o ** =

(

4.9 BASES (Cont'd)

The equalizing charge, as recommended by the manufacturer, is vital to maintaining the ripere-hour capacity of the battery and will be applied as recommended.

The testing of the logic system will verify the ability of the logic systems to bring the auxiliary electrical system to running standby readiness with the presence of an accident signal from any reactor or an undervoltage signal on the start buses or 4-kV shutdown boards.

The periodic simulation of accident signals in conjunction with diesel generator voltage available signals will confirm the ability of the 480-V load shedding logic system to sequentially shed and restart 480-V loads if an accident signal were present and diesel generator voltage were the only source of electrical power.

Specification 4.9.D provides surveillance requirements for Units 1, 2, and 3 diesel generator emergency power sources for the purpose of satisfying Specification 3.9.D. Testing of these power sources is intended to ensure their OPERABILITY when required to support OPERABILITY of the standby gas treatment system and/or the control room emergency ventilation system.

References

1. Normal Auxiliary Power System (BFNP FSAR Subsection 8.4)

2. Standby AC Power Supply and Distribution (BFNP FSAR Subsection 8.5)

3. 250-V DC Power Supply and Distribution (BFNP FSAR Subsection 8.6)

4. Memorandum from G. M. Wilhoite to H. J. Green dated December 4, 1981 (LOO 811208 664) and memorandum from C. E. Winn to H. J. Green dated January 10, 1983 (G02 830112 002) l l

l l

BFN Unit 3 3.9/4.9-21l l

.I

ML20149G243

Text

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