ML20010F618
| ML20010F618 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/08/1981 |
| From: | Delgeorge L COMMONWEALTH EDISON CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8109100442 | |
| Download: ML20010F618 (29) | |
Text
-- v
-- m r
N Commonwealth Edison
) one First Nationti PLtza, Chictgo, Illinois O
O Address R ply to: Post Office Box 767 Chicago lilinois 60690 September 8, 1981 Mr.
A. Schwencer, Chief Licensing Branch 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
LaSalle County Station Units 1 and 2 Diesel Generator and ECCS i
System - FSAR Changes NRC Docket Nos. 50-373/374
Dear Mr. Schwencer:
Attached is a set of changes to the FSAR (pp. 6.3-40, 43, 43a, 7.3-17, 8.3-8, 8a, 9, 9a, 9.5-20,29, 29a,-32, B.1-12,12a,13, response to NRC Questions Q40.29 and Q40.30.
Also, three tables and Tech Spec pages 3/4 8-1 to 3/48-7 and B3/4 8-1, which are not for inclusion in the FSAR, are attached.
The attached Table A presents some typical diesel-generator starting times measured at LaSalle.
In order to accurately represent realistic diesel starting times within the LaSalle FSAR, it is first necessary to verify that these times did not compromise the Emergency Cort Cooling System response times used in the Design Basis Accident Analsis.
These required response times are identified in the "LaSalle Design Basis" columns of Table B and Table C.
Actual test data for these response times are shown in the remaining columns of Table B (LPCS and LPCI) of Table C (For HPCS).
Tables 6.3-2, and 6.3-3 have been revised to reflect the revised diesel start times and to correct the response criteria to reflect actual design and analysis inputs.
The description of the diesel air start systems has been clarified to demonstrate diesel start capability with one air start subsystem are within the revised diesel start times.
The diesel generator Technical Specification surveillances have been similarly revised to verify this start capability.
The LPCI description, 7.3-17, and. the description of the other diesel subsystems have been revised to reflect the revised diesel start times.
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0109100442 810908 PDR ADOCK 05000373 A-PDR
o'
, All of the diesel generators will start a minimum of five times on stored air with normal cranking cycles as required.
The Division 1 and 2 Diesel Generators also start 5 times on stored air with each subsystem, however Division 3 diesel generators will start 3 times on stored air per subsystem.
Since the Division 3 diesel generators are capable of three starts and one of its air start subsystems has an engine driven compressor, which is started manually or by a DC starter motor, the reliability of the system is not compromised by not meeting the 5 start criteria in Standard Review Plan 9.5.6.
The diesel generator output breaker circulty has been revised to incorporate a one-time trip of the breaker upon receipt of a LOCA signal under any operating condition, including test.
The FSAR has been revised to reflect this change.
Minor corrections to the diesel control Jescriptions have also been made.
These proposed changes have been reviewed witi, the NRC Staff (Messrs. A. Bournia and J. Knox) and we believe the changes are acceptable to them.
In the event you have any questions in this regard, please direct them to this office.
Very truly yours, o
L. O. DelGeorge Director of Nuclear Licensing Attachment cc:
NRC Resident Inspector 2500N l
~.
T1ble A Typical LaSalle 1)icsel Generator Starting Times (inseconds) e All Starting 5ysterns (')
Half StarringSystems(2)
Speed Voltage Speed voltage First start:
Cold
- 9. o
- 9.y
- t o. 4
t o. g *
- Hor 9,5
- f o. o *
- 4
- .9 Fifth start:
Cold 9 7*"
10.2 s t. 9 "
12 4 '*
- By tests on dieselgenerators o, sA,1B,1A By tests on dieselgenerator o na a s e By tests on dieselgenerators o,1A, tB (s) Four airstarting motors (2) Two air starting motors
Table B T
ECCS ResponseTimes Division I &2 ' Diesel Generators LaSalle Test
- LaSalle Test
- laSalle Data Basis Data Dasis Design Basis (Diesel not running)
(Diesel running)
LOCA occurs o sec.
O set o sec Diesel clases ento bus YJ sec 13 sec (assumed) 3 sec(actual)
LPCS pump 8eRHR ~Cpump No requirement 13 sec 3 sec starr LPCS pump &RHR'C~ pump
<27 Sec 22 sec 2 sec runmng RHR'N & RHR'B~ pumps No requirement is sec 8 sec start RHR A}&RHR B~ pumps
< 32 sec 27 sec 17 sec running LPCS k RHR "C~ injection
< Ao sec 30 sec 20 sec valves fullopen **
RHR*K&RHKYinjection
< 45 sec 30 sec 20 sec valves fullopen **
- Last sir entries in each column represent actual durations from diesel-generator l
availability as measured during LaSalle testing.
a s Valves are specified to cycle open in 20 seconds.
l
Table C ECC5 ResponseTimes
}
Division 5 Dicwl Generator LaSalle Test LaSalle Data Basis Design Basis (Diesel not running) 4 i
LOCA occurs o sec a sec l
Diesel closes onto bus No requirement ty sec (sssumed) k l
MPCS vain stans No requirement to open l
HPCS pump running No requirement 23 sec NPCS valve fullopen*
< 27 Sec 25.5 sec s valves specified to open in 11 seconds (cycle time).
I
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LSCS-FSAR
-AMENDMENP-- -MAY--197 0-TABLE 6.3-2 Ncte :
SIGNIFICANT INPUT VARIABLES USED IN THE l'a[ut.4 (Jac$a to correct erro LOSS-OF-COOLANT ACCIDENT ANALYSIS and te mnk this ta&{c c.m-
.aistent wir6 A.
PLANT PARAMETERS remnirifer cf
- ESAR, Core Thermal Power MWt M
^
6 Vessel Steam Output LB /hr x 10 m
Corresponding Percent percent 105 of Rated Steam Flow Vessel Steam Dome psia 1055 Pressure Maximum Recirculation ft 3.1 Line Break Area B.
EMERGENCY CORE COOLING SYSTEM PARAMETERS Low-Pressure Coolant Injection System Vessel pressure at psid (vessel 225 which flow may commence to drywell)
Minimum rated flow at gpm 21,200 vessel pressure psid (vessel 20 to drywell)
Initiating Signals Low water level ft above top
>l.0 or active fuel high drywell pressure psig 2.0 Maximum allowable time sec
<27 delay from initiating
- c-signal to4 pump 4 at rated speed Pressure at which psid
<750
[
injaction valve may open
'c ' Injection valve fully sec after DBA 40.0 3
open Injection tulves *KGs' fully cren see after DBA AS 0 fMuimum allowable time delay 5rerr sec
<n I
init'aringsignal to K&*S~yur*'rs at rated sreed 6.3-40
g*
LSCS-FSAR
-AMENDM"NT 32
+tAY 1978 TABLE 6.3-3 t
OPERATIONAL SEQUENCE OF EMERGENCY CORE COOLING SYSTEMS FOR DESIGN-BASIS ACCIDENT TIME (sec)
EVENTS 0
Design-basis loss-of-coolant accident assumed to start; normal auxiliary power assumed to be lost.
%0 Drywell high pressure and reactor low water level reached.
All diesel generators signaled to start; scram; HPCS, LPCS, LPCI signaled to start on high drywell pressure.
%3 Reactor low-low water level reached.
Main steam isolation valves close; HPCS receives second signal to start.
%7 Reactor low-low-low water level reached.
Second signal to start LPCI and LPCS; auto-depressuri-zation sequence begins.
m Alldieselgenerstorsre&dyicicad;{ncrgize""^'=-
'^
gg' y.
pump motor; open HPCS injection valve.
izing LPCI and LPCS pump mot Add inserr A
<27 HPCS injectio v
n and pump at design flow, which comple C
tup.
o
<40 and LPCS pumps at rated flow, 9 and LPCS injection valves open, which completes I
auu urua suerun s.
e See Figure Core effectively reflooded assuming worst single 6.3-21 failure; heatup terminated.
>10 min.
Operator shifts to containment cooling.
NOTE:
For the purpose of all but the next to last entry on this table, all ECCS equipment is assumed to function as designed.
Performance analysis calculations consider the effects of single equipment failures.
(See Sub-sections 6.3.2.5 and 6.3.3.3.)
6.3-43
-t Insert A
~ tp HTCS diesel generators ready to load; energize Hl'ce pump motor; open HPCS injection valve.
Division 1h2 diesel generators ready toload; start to close containment
< 1?
isolation valves.
HPCS injection valve oyen & pump atdesign flow,which completes
<27 HFCS startup; LfCS k LPCI(KHK 'C3 pumps at rated speed.
<31 1PCI(RHR 'f&'B') pumps at rated speed.
l LPCT 'C' and LFCS pt:ntys at rated flow, LECl *C*and L.FCS injurien 440 valves open,which completes the IPCI *C and LPCS Startups, LPC1 ~K& Ypumps at rated iIow, LtCI ~K&'B~ injection valves 445 open, uthich compleres LPCE Startup.
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6.3 - A5a i
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l LSCS-FSAR 9tMf'NDMENT-Mi dANUARY 1979 1
7.3.1.1.1.4.5 Redundancy and Diversity The LPCI is actuated by either reactor vessel low water level or drywell high-pressure.
Both of these conditions will result from a design-basis loss-of-coolant accident.
As described in Subsection 7.3.1.1.1.3.2, if one low level switch fails, the high drywell pressure or a combination of low level and drywell pressure switches will initiate LPCI.
i LPCI A initiation logic is common to the LPCS and is separated from the initiation logic for LPCI B and LPCI C.
Each initiation logic uses the same one-out-of-two twice form; however, one trip system uses only Division 1 sensors (LPCI A), and the other trip system uses only Division 2 sensors (LPCI B, LPCI C).
Each trip system consists of two level switches and two drywell high-pressure switches ccnnected into a cne-out-of-two twice configuration.
7.3.1.1.1.4.6 Actuated revices The f unctional control arrangement for the LPCI system pumps is shown in Figure 7.3-12.
LPCI system pumps start immediately if normal auxiliary power is available or are delayed as described in Subsection 7.3.1.1.1.4.3.
The time delays are provided by timers (see Table 7.3-1).
The delay times for the pumps to start l
when normal a-c power is not available include approximatcly 3 time recend for the start signal to develop after the actual reactor vessel low water level cr drywell high-pressure occurs, +G time ccccnd: for the standby power to become available, and a sequencing delay to prevent overloading the source of standby power.
The total delay times from the time of the accident to the start of the main system pumps are:
Pump A, 18 seconds; Pump B,
18 seconds; anc Pump C, 13 seconds.
If normal power is available, the delay time for all three pumps is 13 seconds.
The operator can also control the pumps manually from the main control room.
The main system pump motors are provided with overload protection.
The overload relays maintain power on the motor as long as possible without harming the motor or jeopardizing the emergency power system.
All automatic valves used in the LPCI function are equipped with remote / manual test capability.
The entire system can be operated from the control rocm.
Motor-operated valves have limit switches to turn off the motor when the full open or full closed positions are reached.
Torque switches are alsc provided to control valve motor forces when valves are closing.
Thermal overload devices are used to trip motor-opersted valves and to provide alarms.
Valves that also have primary containment and reactor vessel isolaticn requirements are described in subsection 7. 3.1.1. 2.
LPCI valves are required to travel full stroke within 40 seconds after the start of the maximum recirculation line break accident.
7.3-17
LSCS-FSAR The diesel generator sets have ample capacity to supply all power required for the safe shutdown of both units in the event of a total loss of offsite pcwer.
Ample capacity is provided for the condition in which cne unit may be involved in a loss-of-coolant accident while the remaining unit is being shut down without loss of coolant, as well as for the condition in which both units are concurrently being shut down without loss-of-coolant accidents.
The diesel generators are rated as indicated in Table 8.3-3.
The continuous ratings of the diesel generators are based on the maximum coincidental LOCA or shutdcwn load expected.
The startj g systems are described in Subsection 9.5.6.
Control power for each diesel generator is supplied from the 125-Vdc battery within its associated division.
Thc d c contrcic
-fcr dicccl gencretor "O", crc cup @ied-4 rom - the "ni-t 1 Divicica d c bc_ Add htscrt A and run in.
In the event of loss of all normal sources of power (onsite and offsite) to the class 1E power system, each diesel generator set is automatically started and loaded.
Controls and circuitry used to start and load the redundant units are independent of each other.
The starting circuitry and control power is provided by a 125-Vdc battery for each division Icad group.
The diesel generator automatic starting and loading proceeds as follows:
a.
Each diesel generator is automatically started by one of the following events (Figure 8. 3-2) :
1.
Undervoltage develops on the associated 4-kV bus.
2.
Low water level develops in the reactor vessel.
3.
High pressure develops in the primary containment.
b.
Should automatic f ast source transfer fail to occur kn!
upon loss of voltage p the 4160-volt.divicien buses. Idivisional!
all 4-kV motor loads on the Division 1 and Division 2 buses are shed.
Division 3 loads are not shed following a loss of bus voltage,sincc the rculconnected bus leadis within thc capabilityof the diesel-generator set.
l c.
Af ter each diesel generator set has attained a normal frequency and voltage, its breaker closes if no.
1 i
a-c power has been lost in the manner described above.
Tlris constiture.ie-the automatic slow transfer scheme.
d.
If normal a-c power is still present and the diesel generator was started by signals a.2 or a.3 preceding, the diesel generator breaker does not close, and the set remains at full frequency and voltage until manually shut down.
i 8.3-8
r l
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Inserr A The 125-Vdc contrcl power for diesel generator "O~is supplied from l
either Unir 1 Division s or Unit 1 Division s as determined by the position of an automatic transfer switch located in the diesel generator
'o control panel. The automatic transfer switch seeks Unir Division 1.
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l 8 3 -Sa f.~._._-_..___..________.__.,_,._,__,,
LSCS-FSAR
-AMENDMENP-5+
-dANUARY-1981-e.
If normal a-c power is lost and signals a. 2 and a.3 are not present, only the loads needed for i
safe shutdown are connected automatically or manually by the operator's action as station conditions require.
CM4]$3ILM auxili(ary breaker position switches, are provided to prevent an Electt cal interlocks, consisting of mechanically actuated operator from paralleling, through the unit ties, two standby diesel generators without an offsite source connected to one of the associated ESF buses.
Additional interlocks prevent automatic closure of a standby diesel generatcr breaker ':fter an ::tematic tert; to its associated 4160-volt bus (supplying ESF loads), unless the normal id1 offsite) source, the unit tie (#2 offsite) source, wwwb the bus tie (#1 onsite) source are all open, and en underecirge conJirion nisuon the bw.
g brukes All control circuits and their components including the bus l
transfer system are provided with means for manual testing during i
normal station operation and meet IEEE 279-1971 criteria.
Means are provided to permit connecting selected non-1E loads in the station to the diesel generator set within its capability.
l However, this is a strictly manual operation under the operator's t
full centrol.
Each diesel generatcr can be started manually either by a control switch located on the main control board or by a control switch located on the separate local control panel of the diesel generator (NOTE:
diesel generator "O" has a control switch on
[
both U 1 MCB and U-2 MCB).
Diesel generators 1B and 3B are each furnished with a two position selector switch (" remote" and
" local") located at the remote control station in the control room.
The fuel oil system, air starting system, and generator output and excitation systems of each diesel engine are equipped with i
instrumentation to monitor all important parameters and to annunciate abnormal conditions.
l Table 8.3-4 shows the protective and supervisory functions for each diesel generatcr, Instrumentation is shown on Figure 8.3-6.
The fuel oil storage and transfer systems are described in l
Subsection 9.5.4, lubrication systems in Subsection 9.5.7, and cooling systems in Subsection 9.5.5.
l 8.3-9
Insert A f.
If, while nperating as per item e, signal a.2 or a.3 appears, the Division 1 and Divison 2 diesel generator breakers are tripped caising all 4kV motor loads to be shed from these buses.
The Division 1 and Division 2 diesel generator breakers then reclose and the required class lE loads are started auter.ati-cally.
Division 3 does not require load shedding and, therefore, upon appearance of si(fjal a. 2 or a.1 the diesel generator breaker remains closed and the required Class lE loads are started automatically.
g.
If, while the diesel generator is connected to the bus during routine periodic load testing, signal a. or a.3 appears, the Division 1 and Division 2 diescl generator breakers are tripped.
If normal a-c power is still present the diesel generator breahors do not reclose ar.1 the sets remain at full frequency and voltage until manually shut down.
If normal a-c power is coincidentally or subsequently lost, all 4kV motor loads are shed, the diesel generator breakers are reclosed and the required Class lE loads are started automatically.
Ditision 3 does not require load shedding and, therefore, upon appearance of signal a.2 or a.3 the diese' generator breaker remains closed and the required class lE loads are started automatically.
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E.3-93 i
I LSCS-FSAR
-AMENDM ENP-2-3 SEPTEMBER-09t?-
As a supplement to the station battery supplied emergency g
lighting system, additional self-contained, battery operated emergency lighting units of a portable or semiportable type are provided where required. Theseareequippedwith4-hourbatterysup-l pl:es.
9.5.4 Diesel-Generator Fuel Oil Storage and Transfer l
System The design objective of the diesel fuel oil storage and transfer system is to supply fuel to the diesel generator during a loss-of-coolant accident (LOCA) as well as for all conditions of shutdown without a LOCA.
9.5.4.1 Design Bases 9.5.4.1.1 Safety Design Bases I
l Specific safety design bases for the five fuel oil storage and transfer systems are as follows:
a.
The system is designed consistent with automatic l
startup of each diesel generator set such that
(
required loads can be accepted in 10 cc=nac.within the nauirritime.
b.
All system piping and components required to assure a 7-day supply of fuel to the diesel generators are
(
designed to Seismic Category I and ASME Section III, Class 3 requirements and are protected from tornadoes, missiles, pipe whip, and floc-ds.
c.
The entire diesel-generator system consisting of five diesel generators including the associated fuel storage and transfer system is designed to meet single failure criteria.
Each fuel system or diesel generator in itself does not need to meet the single f ailure criteria.
d.
The minimum required fuel storage capacity for each Division 1 and 2 diesel generator is 31,250 gallons which is based on continuous diesel generator operation at rated capacity for 7 days.
Fuel consumption at rated capacity is 186 gph.
The minimum required storage capacity for each Division 3 diesel generator is 29,750 gallons which is based on the following criteria:
)
1.
High pressure core spray (HPCS) pump operation at maximum power demand conditions for 25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br />, after which tire the pump operates at runout flow for the balance of the 7-day period.
All other Division 3 loads operate at maximum power for the full 7-day period.
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9.5-20
(
LSCS-PSAR
,MiENDMENT-54 dANUARY-4 9 b1-
- (
Temperature switches installed at the engine outlet actuate local and control room alarms at 200* F and automatically trip the engine at a temperature of 208' F.
This automatic trip is bypassed, however, when the engine is started auto-natically during an emergency.
A temperature switch installed 1.
the lube oil cooler controls the electric immersion heater uses, to keep the engine in a warm standby condition.
Low-temperature switches on the Divi-sions 1, 2,
and 3 diesel generators actuate local and control room alarms if engine temperature drops below 85' F to detect failure of the diesel cooling water heaters.
9.5.6 Diesel-Generator Starting Air Systen The purpose of the diesel-generator starting air system is to provide a quick, reliable, and automatic start of the generators.
9.5.6.1 Design Bases 9.5.6.1.1 Safety Design Bases The design objective of cach diesel starting air system is to automatically start the associated diesel-generator unit such that rated frequency and voltage is achieved and the unit is ready to accept requircd loads within M-eeeende, the rceuired time.
The starting air system design is based on meeting single fail-ure criteria.
Each diesel generator is provided with two eee-
-p4et c f-ul-Hweit-y sta rt ing air subsystems, and each diesel-generator % starting air systemg s independent of the other ficsd gccmtars.
i four-s t-a r-t ifug-a-i r-sy s leas.
which (h.fts its Own)
The system design is based on seismic Category I requirements and incorporates protection from tornadoes, external missiles, floods, and other natural phenomena.
Idctc & Fachwliesel-generator-start.ing air-system-consists-of-te
- 33 s t a t t ing-s ubsys tems -and-ha s -su f f icien t-total-a i r--s torage-3
-capaci ty-for-a minimum of - six-normal crank i ng-cycles--4si-x-I"""A
-no rma l-- s t a r t s ).--W i th -a ll-f our --a i r -mo tor s-s i mul taneously,
<each -d iesel--will-achieve -900 -t pm -i-M in-les s -than--lbseconds-f o r -f ive--norma-1-s t a r t s-on-s tored-a i+.
Air--storage-capacity for-each..subsyster4 is-based-on-a-minimum of five-normal-crankingwycles in-rapid-succession-without l
.use o f--th e -a i r--compre s sor,- a s s umi ng -th e-r edund an t-subsy s tem-f-a i 1 s - to - ope ra te.- Th e -m i n i mum -receive r--pre s s u re-req u i red--to essu re-a -f a s t-s ta rt - is -approxima tely-2 20-ps ig -when -s ta r tin +y on -two-a i r -moto rs.
When -u t ili z ing-a ll-four---ai r--motors-simul-taneounly, -the-ninimum cranking-pressure-is -reduced-to-approx-l:
ina t ely - 14 0 -to.-155 -psig.---The -mi n imum -r ece ive r-p res su re-a t-l 4nitiation of-the--starting -sequence. is-assumed-to be -at the
. air-compressor-control-switch " start" -setpoint-r-9.5-29
Inserr A Each dieselgenerator starting air system consists of two startingsubsystems. The air storage capacity of each subsystem is based on a minimum of five normal cranking cycles in rapid succession without the use of the air compressor for the Division t and Division 1 Diesel Generators and three normal cranking cycles in rapid succession without the use of the air compressor for theDivision y Diesel Generators, assuming the redundant subsystem fails to operate. A normal cranking cycle is assumed to mean the Diesel Generator will Start and accelerate to 90o rpm +57,,-3% within :) seconds. The minimum receiver pressure ar initiation of the starting sequence is less than or caual to the air compressor auto start setpoint of approximately 2to psig.
The minimum air receiver pressure recuired to assure a single normal cranking cycle is approximately t6y psig when starring with one subsystem and approximately t40 to sgy psig when starting with both subsystems. Therefore, alow air pressure alarm is ser at abour 200 psig to ensure prompt notification to the Contro! Acom of an abnor,nalpressure condition below approximately 210 psig nor nal minimum header pressure.
9 5-29a
LSCS-FSAR AMENDMENT JANUARY-1981-1 for the Division 3 systems actuate local (Division 3 only) and control room alarms on low air pressure.
Each air compressor is controlled by a pressure switch connected to the corresponding air receiver.
The compressor is started at approvnutely 2:0 -Ee+ psig and is stopped at 240 psig.
l A
2fyreximately For the refrigerated air dryers'provitled, indicators are l
installed to identify a malfunction of the air dryer unit,when thc air ccmprewrs are running.
9.5.7 Diesel-Generator Lubrication System The function of the diesel generator lube oil system is to supply lube oil to the engine bearing surfaces at controlled pressure, temperature, and cleanliness conditions.
9.5.7.1 Design Bases 9.5.7.1.1 Sa f ety Desian Bases a.
The system is based on reliable f ast starting such that the diesel generator can accept loads within +4 the rcquired time recendc.
To accomplish this the lube oil is heated l (L-above 1000 F when the engine is not operating by an l
immersion heater in the engine cooling water system (Subsection 9.5.5).
The warm lube oil is circulated to the turbocharger bearing and oil filter during shutdown by an electric circulating pump.
b.
To meet the single failure criterion, each diesel-generator lube oil system is independent and located l
entirely on the diesel generator skid.
1 l
c.
System piping and components are designed to meet seismic Category I requirements.
Tornado, missile, and flood protection is provided by locating the diesel-generator skid within the Seismic Category I reinforced concrete diesel generator building.
Protection against pipe whip is not necessary as the only high energy piping located within the diesel-generator building is the diesel generator starting air system piping.
The diesel generators and their l
associated auxiliary systems are separated from each other by reinforced concrete walls.
l 9.5.7.1.2 Power Generation Design Bases Since the diesel generators' sole function is to provide an I
onsite source of standby power to safely shut down the plant and (I
mitigate the consequences of an accident, the diesel generators are not required to operate during plant power generation except 9.5-32
LSCS-FSAR
, AMENDMENT MARCH-197 &
During the preoperational testing, it is verified that the diesel
- I generators are capable of starting and accelerating to rated speed, in the required sequence, all the needed ESF and emergency shutdown loras, while maintaining the voltage and frequency within the limits specified in Fosition 4 Conformance.
During
. these ".ests, the overspeed limits are also verified.
f 1rvert!r )
The saitability of each standby diesel generator is confirmed by prototype qualification test data and by preoperational tests.
The HPCS diesel-generator unit is considered as a unique application, justifiable departure from the strict conformance to Regulatory Guide 1.9 - 1971 regarding voltage and frequency limits during the initial loading transient.
The HPCS system consa nts of one large pump and motor combination which represents more than 90% of the total load; consequently, limiting the momentary voltage drop to 25% and the momentary frequency drop to 5% would not significantly enhance the reliability of HPCS operation.
To meet the specific Regulatory Guide requirementt, a diesel generator unit approximately two to three times as large as that required to carry the continuous rated load, would be necessa ry.
The specific diesel engine-electric generator-pump assembly was designed specifically for this integre.1 operation.
The frequency and voltage overshoot requirements of Regulatory Guide 1.9 - 1971 are met.
A factory testing program on a prototype unit has verified the following functions:
a.
system fast-start capabilities, b.
load-carrying capability, c.
load shedding capability, d.
ability of the system to accept and carry the required loads, and e.
the mechanical integrity of the diesel-engine generator unit and all of the major system auxiliaries.
toNf GE Licensing Topical Report, "HPCS Power Supply," NEDO-t&9s, describes the theoretical analytical aspects of the unique application including prototype and reliability test conside ra tions.
The design of the HPCS diesel-generator conforms with the applicable sections of IEEE Criteria for Class IE " Electrical Systems for Nuclear Power Generation Stations," IEEE Standard 308-1971.
The generator has the capability of providing power for starting the required loads with operationally acceptable voltage and
(
f requency recovery characteristics.
A partial or complete load rejection will not cause the diesel-engine to trip on overspeed.
B.1-12
Inserr A Paition C.1.a.(s) of Regulatory Guide s. sos allows the Division t and Division 2 Diesel Generators to be running in standby at 50% speed droop. Under this rare condition the Division 1 and1 Diesel Generators do not meet the voltage requirements of Regulatory Guide s.9 during the ECCS pump starts. A test of the Division s Diesel Generator (wor.st case) w::s done for two conditions.
One test was a simultaneous Eccs initiation with bus undervoltage, while the diesel was in a test mode at 50% speed droop. The other test was an Ecc5 initiation signal v::th the diesel in a test mode at 50% speed droop, followed later by bus undervo:tage. The test verified the capability of the diesels to pick up the pump loads with no indication of any possible failures due to the voltage transient and recovery time.
B.1 - f2a
r.
LSCS-FSAR AMENDMENT +fARCH-19 7 &-
WJS 7
A special prototype test eill be conducted at the LSCS fa cility 5
to field (site) verify the hardware real load aspects of the HPCS power supply concept.
This test YIl1 50 conducted in 4M4. february,8971.
Thi< protosyge test verified the acceptability cf the Hrcs power supply concept.
The HPCS diesel generators utilized in LSCS Units 1 and 2 are in compliance with the intent of this guide through the alternate approach cited above.
The other standby-power diesel-generators and their loading schemes are in compliance with the guidance set forth in this guide.
O k
B.1-13
1 LSCS-FSAR ftMENDMENTHM-4EPTEMBER-19M-QUESTION 040.29
" Describe the sensors and alarms provided in your design of the diesel generator air starting system to warn the operator when design parameters are exceeded.
Discuss the operator actions during alarm conditions.
(SRP 9.5.6, Part III, Item 1. ) "
RESPONSE
All sensors and alarms for the diesel-generator starting I
air system are described in Subsection 9.5.6.5 and indicated on revised Figure 9.5-8.
Upon low-pressure alarm actuation, the operator must take appropriate steps to prevent further loss of air pressure; make the necessary repairs or adjustments; and restore the system to standby with air pressure in the normal range of 494 to 49& psig.
A b
appretimately2to approtimately 140 i
Q40.29-1
LSCS-FSAR AMENDMENT-M GEPTEMBER IT,'?
QUESTION 040.30 t
"Section 9.5.6.2 states that each subsystem except those associated with the Division 3 diesel-generator is pro-vided with a moisture separator and refrigerated air dryer between the air compressor ar d air receiver tank.
Explain why Divisions 1 and 2 have this feature while Division 3 does not.
Also, what is the affect on relia-bility for Division 3 without these components."
RESPONSE
The Oiiision 1 and 2 diesel-generator starting air systems have moisture separators and refrigerated air dryers to provide added assurance against moisture accumulations in the receiver tanks. 4he-lack-of-this-equipment 4 n-the-Divt-cien 3 ctar ting ci<-system-hac 0 cf4cet er reliability-e4 gr-iodic-inspec t ions-a re-used-to-detest and drair any moisture accrulation in the air-receiver +.
t i
040.30-1
LSCS-FSAR 4MENOMENT SEPTEMBER -1977-(
QUESTION 040.42
" Describe any sensors and alarms provided in your design of the diesel erigine combustion air intake and exhaust system to warn the operator when design parameters are exceeded.
Discuss the operator actions during an alarm condition.
(SRP 9.5.8, Part III, Item 1 & 4.)"
RESPONSE
The diesel-generator air intake and exhaust systems do not require monitoring or alarming of any parameters.
-Thc ci+
44-1-t e r-suppl i ed -wi t h--t.he -eng i ne -i s -prov ided -wi t ha -r4 st r io-
+ ion-indicator-discussed--in-Subsect-ion-9.-hed. Intake filters supplied with the engine are changed periodically.
Explanarcry cere: This correction shoi&fSare fun marfe y
in Amentfnent54 whenSection 9.5.s.+
r.rt was corrected There is noftwrestrict4n inificater.
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3/4.8 _ ELECTRICAL '0WER SYSTEMS 3/4.S.1 A.C. SOURCES A.C. SOURCES - OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:
a.
Two physically independent circuits between the offsite transmission network and the onsite Class 15 distribution system, and l
b.
Three separats and independent diesel generators with:
i.
For diesel generator 0 and 1A:
a)
A separate day fuel tank containing a minimum of 250 gallons of fuel.
b)
A secarate fuel storage system containing a minimum of 11,000 gallons of fuel.
2..
For diesel ger.srator 13, a separate fuel storage tank / day tank containing a minimum of 29,750 gallons of fuel.
3.
A separate fuel transfer cump.
APPLICABRITY: OPERATIONAL CONDITIONS 1, 2, and 3.
-.CTION:
A Itasis for change a.
With either one offsite circuit or diesel generator G or IA of the l
Re5 uide uosda<ribes above required A.C. electrical power sources inoperable, derenetr:t:
G m<<r cr<rsi.it,.'"' '# f,r,m,'.#
"# '"'f' C
.the-OFERABRIP of the-remain 4m; A.C. :oura::: by perfo-ing y rces u,
ServeH4ance-Reottirements 1. 8.1.1.1. a and 4. S.1.1. 2.. ?, wi thin saa l
Mu r, Reg GurJ< v.ros,8 hour-and-at-least-once-per-8-hour; thereaf teet restore at least two ragc 8. TaH4 4.s.f.8 2.f offsite circuits and diesel generators 0 and 1A to OPERABLE status mass alimsnu ra turesse within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT SHUTDOWN within tne next 12 "D
',y,'[#[
hours and in COLD SHUTDOWN within the follcwing 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
b.
With one offsite circuit and diesel generator 0 or IA of the above required A.C. electrical power sources inoperable, 4emonstrate-the.
Sam, hm*, j, 4PERABRHY-of-the-remaining-arc. :ources-by-performing-Surveillance
-Requirements-4.8c t %ure thereaf-ter-;. restore at least one of the
'l h 124ra-and 4. 8.1.1. 2. a r4-wi thi n-o ne-hour-and-et-utt,n 2, a,,,,,
. lea st-once-pe r-eigh inoperable A.C. sources to OPERABLE status within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or be in at least HOT SHUT 00WN within the next hours and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Restor at least two offsite circuits and diesel generators 0 and IA to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> frnm the time of initial loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
LA SALLE - UNIT 1 3/4 8-1 JAfi i1 5.
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LIMITING CONDITION FOR OPERATION (Continued) c.
With two of the above recuired offsite circuits inoperable,. demon-4tra te-the-CP E RABI LITY-o f-th r et - di e s e l-ge ne ra to rs-by-pe r fo rm i ng-hme basis J5 4urvei1-lence. Requirament 4.8.M.2.a.4.within-one hour--and-at444st Actirn 2. abwe.
ence-pe r-4 -hour s -the rea f te r,-un l e s 5 -the -d i e se l-ge ne ra to r s-a re-a l ready 4
. operating;. restore at least one of the inoperable offsite circuits to OPERASLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. With only one offsite circuit restored to OPERABLE status, restore at least two offsite circuits to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
d.
With diesel generr*. ors 0 and 1A of the above recuired A.C. electrical power sourcas inoperacle,.4emonstrete-tne-OPERASILITY-of-the-remainiuf-g,,,, 9 7,,,
AC.-sourcas-by-performing -Surveillance-Requirements-4.r8.1.1.1. : :nd-M.-1-t2 ;-e.4-wi th i n-one - hou r-and-a t 4 e a s t,-onc e-pe r-8-hou r s-t he re a f-ter+
Af"" 8 #N"-
restore at least one of the incoerable diesel generators 0 and 1A to
+
CPERABLE status witnin 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Restore both diesel generators 0 and 1A to OPERABLE status 1
I within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
e.
With diesel generator 13 of the above required A.C. electrical power sources inoperable,. demonstrate-the-CPERA8ILITY-of-the-romairaag h, bi, as AC. :cerces-by-performing-Surveillance-Requirements-4r8ciririra--aad-Arian a. Aws.
4.8.L-1. 2, a. 4-wi-th i n me -hour-and -a t4 e a s t-onc e-per-8-hours-thereaf-tee;-
restore the inoperable diesel generator 18 to OPERABLE status within i
72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or declare the HPCS system inoperable and take the ACTION l
required by Specification 3.5.1.
SURVEILLANCE REOUIREMENTS l
4.8.1.1.7 Each of the above required independent circuits between the offsite transmission network and the onsite Class IE distribution system shall be:
l a.
Determinad OPERABLE at least once per 7 days by verifying correct breaker alignments and indicated power availability, and b.
Demonstrated OPERABLE at least once per 18 months during shutdown by manually transferring unit power supply from the normal circuit to l
the alternate circuit.
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SURVEILLANCE REOUIREMENTS (Continued) 4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE:
In accordance with the frequency specified in Ta'ble 4.8.1.1.2-1 on a a.
STAGGERED TEST BASIS by-1.
Verifying the fuel level i.n the day fuel tank.
2.
Verifying the fuel ldvel in the fuel storage tank.
3.
Verifying the fuel transfer pump starts and transfers f*iel from Basis for chaMes_
the storage system to the day fuel tank.
g 900ryn is equinforcrto 40 Hr,tb 400, 8,o, 4.
Verifying the diesel starts frcm ambient condition and acceler-is eco ny,,. n ce..
ates to 900 rpm +g98s, -3% in less than or equal to,54-seconds. 55,f f 2.s J,, Wast,,,,e res The generator voltage and frequency shall be 4160 + 150 volts e
y b/d' ta ct,<< oate W ia and 60 + 3.0, -1.2 H: within (13) seconds after the start signal.
s 8 5 s<ua*.
The diesel-generate s hal' be starred for-4Ms._t.est 4y--us kg-one-ef-the-fo14 ewing 44 nalc "ith ctastup-on4ach-+4pnal veri fi ed at-Sasis for deler~cns 9
- f. Arevires usecf iumfers,wlila M
^^C W ' E 4 ;
sad roA oi decresse.4 rr*loWty.
e)
Manual 1.1rytnd regu'rrments of h 0d' ' 8#E i
-t }
Shulated-loss--of o?!siteper.-cy--i-tse4 f..
c)
S imul ated-lon of Of f+5te-pc=c r confune4.icr with cr EEr 4-cct = tic &-tc;t cig n' ESF nt_: tier t u t sig n1 :. it:
C t-5.
Verifying the diesel generator is synchronized, ioadedto greater than or equal to 2600 kw.nd operates for greater than or equal to 60 minutes.
6.
Verifying the diesel generator is aligned to provide standoy power to the associated emergency busses.
7.
Verifying the, pressure in +41. diesel ger.e-rator air start receivers fer at Itast ont subsys_r, car to be greater than or ecual tot'165%%psig.
l b.
At least once per 31 days 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 the day and engine-mounted fuel tanks.
c.
At least once per 92 days and from new fuel oil prior to addition to the storage tanks by verifying that a sample obtained in accordance with ASTM-D270-1975 has a water and sediment content of less than or equal to 0.05 volume percent and a kinematic viscosity @ 40 C of greater than or equal to 1.3 but less than or equal to 2.4 when tested in accordance with ASTM-0975-77, and an impurity level of less than 2 mg. of insolubles per 100 ml. when tested in accordance with ASTM-D2274-70.
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CiURICAL POWER SYSThMS SURVEILLANCE REOUIREMENTS (Continued) d.
At least once per 18 months during shutdown by:
1.
Subjecting the diesel to an inspection in accordance with procedures prepared in conjbaction with its manufacturer's recommendations for this class of standby service.
2.
Verifying the diesel generator capability to reject a load of greater than or equal to 1190 kw for diesel generator 0, greater than or equal to 638 kw for diesel generator lA, and greater i
than or equal to 2381 kw for diesel generator 1B while maintain-f ing engine speed less than or equal to 75% of the difference between nominal speed and the overspeed trip setpoint or 15%
above nominal, whichever is less.
3.
Verifying the diesel generator capability to reject a load of 2600 kw without tripping. The generator voltage shall not exceed 5000 volts during and following the load rejection.
l 4.
Simulating a loss of offsite power by itself, and:
j a)
For Divisions 1 and 2:
q 1
1)
Verifying de-energization of the emergency busses and load shedding from the emergency busses.
2)
Verifying the, diesel generator starts on the auto-start signal, energizes the emergency busses with permanently l
connected loads withingl@ seconds, energizes the auto-l13
[
connected loads and operates for greater than or equal
]
to 5 minutes while its generator is so loaded. After 7 -(-B seconds following energization, the steady state l
voltage and frequency of the emergency busses shall be maintained at 4160 150 volts and 60 1.2 Hz during this test.
i l
b)
For Division 3:
1)
Verifying de-energization of the emergency bus.
i I
i 2)
Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads with-4 ty ing19 seconds and operates for greater than or equal to 5 minutes while its generator is so loaded. After s-(--). seconds following energization, the steady state l
voltage and frequency of the emergency bus shall be maintained at 4160 150 volts and 60 1 1.2 Hz during this test.
his in deletion 5.
'!ee4 fy ing-tha t-on-an-ECCS-ac t u a tion-tes t-s i g na4r-wi thou t-lo s s ef-of f site-power -the-diesel-generator-starts-on-the-auto = star-t-f.Recm,rrs we of Juartes, r
eddiny risk.
.s4gnal-and-operates-on-standby-for-greater-than-or-equal to- -minutesr---The-generator-voitage-and-frequency-shall.-be 4160 ANeye,,j rrodrewnrs of A420, -150-volts -and-60-+-3.0v -172-Hz-within-13-seconds--after-l Rip Guide f, fos,
-the-a uto-s ta rt-s i gnal ;--the 4,teady_ state-generator-voitage-and-4reque ncy-s hal l-be - mai ntai ne d -withi n-the s e4imi ts-du ring -thi s-te st.
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SURVEILLANCE REOUIREMENTS (Continued)
Basis for deletion 4.
-Verifying that on.a-simulated lossaf the diesel generator,-
3cycnd requirernents with offsite power not available, the loads are shed from-the d Kig Grdde f.fcs.
emergency busses and-that. subsequent-loading of-the-diesel ge ne ra to r -i s -i n -acco rdance-wi th-de s ign-requ + rements.
7.
Simulating a loss of offsite power in conjunction with an ECCS actuation test signal, and:
a)
For Divisions 1 and 2:
1)
Verifying de-energization of the emergency busses and load shedding from the emergency busses.
2)
Verifying the diesel generator starts on the auto-start signal, energizes the emergency busses with permanently bl5 gr cgnge connected loads within g seconds, energizes the f3 geg. Guide i.9 and G.E.
auto-connected emergency loads through the load p;
3p;3, setjencer and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads.
After /+)-seconds-feHewi+wj energi-zation, the steady state voltage and frequency of the emergency busses chall be maintained at 4160 450 80%
volts and 60 1.2 Hz during this test,rsecyc fera secands Pasts for deletwn
'genr&ng start and stre a toas, "i)
. e ri fy i ng -th a t-a lbac tora t ic -d i es el-ge ne ra tost 44ps,
Feyond requ'rcenents of
.exce pt-e ngi ne-ove r spe ed r-generator-di f f e rent-i el--
Reg. Guide i. fos, curre nt,a nd-eme rge ncy-ma nual-s top r are-automat 4ce44y
. bypassed-upon loss-of--voltage-on--the-emergency bus.
.concurrentwith-an-ECCS-actuation signal.
b)
For Division 3:
1)
Verifying de-energization of the emergency bus.
2)
Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads Basis for cbnge within,<t0 seconds and operates for greater than or t3 equal to 5 minutes while its generator is loaded with Ecg. 6uide t.s and 6.f.
the emergency loads.
Af ter -(-)-seconds-foHowing Pd'8# S'".#'
energization, the steady state voltage and frequency of the emergency bus shall be maintained at 4160 10 %
450 volts and 60 1.2 Hz during this test,sunit forfsu,nh fellowing the stars saa stor d fonds.
3Jsis for deletion 3)
Ve ri fy i ng - th a t-a H-au toma t ic-d i es el-genera toe-t%
exc ept - e ngi ne-ov e r s peed r--genera to r-di ffe rential-er.
Feyond requirernents of
.ove rc u r re n te nd-eme rge ncy-ma nuabs top r-a re-auto-Reg Guide t.ros matica11y-bypassed-upon-loss-of-voltage-en the-.
emergency bus-concurrent-with-an-EEGS-actuatica ';1gn:1
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SURVEILLANCE REQUIREMENTS (Continued)
Ba<is for dunge Verifying the diesel generator operates for at'least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
8.
.t.LnJ ro censi rrntly.
During the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of this test, the diesel generator 2.Run D/G theur.
shall be loaded to greater than or equal to 2860 kw and during i sthu nudtr af fccS the remaining 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the diesel generator shall fump suru.
be loaded to 2600 kw. The generator voltage and frequency shall 4,rrectJ,,teriens relief be 4160 + 420, 150 volts and 60 + 3.0, -1.2 H: within 13 seconds frivi rut.drJullrif after the start signal; the steady state generator voltage and hring,ursp, a,%
frequency shall be maintained within these limits during this
,nfJ s u to aitial r,th, test.
Within 5 minutes after completing this 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test, perform Surveillance Requirement 4-Gd-4-hdne)4)-end+)-2).
A. s.s.s.2.d. A sna A.e.s.t.t 2 5.
SJdJ [Or deltrien. G -Verifying-that -the-auto-connected loads-to-each-diesel-generator t+o-not exceed -the -2000-hour-rating ci 2860-%--
Styond requireretnis cf Reg. Guide t.let.
Verifying the diesel generator's capability to:
10.
a)
Synchroilize with the offsite power source while t'he generator
- is loaded with its emergency loads upon a simulated restora-tion of offsite power, b)
Transfer its loads to the offsite power source, and c)
Be restored to its standby status.
T11. Verifying that with the diesel generator operating in a test mode and connected to its bus, a simulated safety injection signal overrides the test mode by (1) returning the diesel gener6 tor to standby operation, and (2) automatically energizes the emergency -loads with of f site' power.}
12.
Verifying that with all diesel generator air start receivers pressurized to less than4the comprcssors auto-start setpoint and the ccmpressors secured, the diesel generator starts at
[Fr iEDC least 5 tires +from ambient conditions and accelerates to IS2 4tuels W 900 rpm 5%, -2Y, in less than or equal to M seconds.
tin 188 f8F Ib' II d5 di"b 13.
Verifying that.the automatic load sequence timer is OPERABLE with the interval between each load block within 10% of its design interval for diesel generators 0 and 1A.
F Ve r4fyi ng -tha t-t h e-f o Ll owi ng -d ie s e b-ge ne ra to r-loc kout-fehs.
. prev e nt-di e s e l-g e n e ra t o r - s t a r t i ng-o nl y~-when-requi reth-L51s fer Jeferton c) cenerator-undercrequeney.
-b) tow-4ebe-oil-pressee..
Frycad recuirement, Mi h-jamt-cooking temperatm.
9 cf Reg.GuiJe f.scs.
d)
Generatorw everse-power _,.
e.}-Gene rator--ove rcurr.ent.
f.)~ Generator loss-of-fia14.
.g.)
Engine-cranking lockout.
LA SALLE - UNIT 1 3/4 8-6 AW 6199
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i SURVEILLANCE REOUIREMENTS (Continued)
At least once per 10 yeart or after any modifications which could e.
affect diesel generator interdependence by starting all three diesel generators simultaneously, durino shutdown, and verifying that all three diesel generators accelerau to 900 rpm + 5, -2% in less than
[
orequaltoyseconds.
f.
At least once per 10 years by:
1.
Draining each fuel oil storage tank, removing the accumulated sediment and cleaning tne tank using a sodium hypochlorite or equivalent solution, and 2.
Performing a pressure test of those pcrtions of the. diesel fuel oil system designed to Section III, subsection ND, of the ASME Code at a test pressure equal to 110 percent of-the :ycte-44es4 s-preswes. that.*pecturd in AsMt Section it samtton 1WD seco.
9 4.8.1.1.3 Recorts - All diesel generator failures, valid or non-valid, shall be reported to the Commission pursuant to Specification 6.6.S.
Reports of diesel generator failures shall include the information recommended in Regula-tory Postion C.3.b of Regulatory Guide 1.108, Revision 1, August 1977.
If the number of failut es in the last 100 valid tests, on a per nuclear unit basis, is greater than :r equal to 7, the report shall be supplemented to include the additional information recommended in Regulatory Position c.3.b of Regulatory Guide 1.108, Revision 1, August 1977.
TABLE 4.8.1.1.2-1 DIESEL GENERATOR TEST SCHEDULE Number of Failures in Last 100 Valid Tests
- Test Frecuency
<1 At least once per 31 days 2
At least once per 14 days 3
At least once per 7 days
>4 At least once per 3 days
" Criteria for determining number of failures and number of valid tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.108, Revision 1, August 1977, where the last 100 tests are determined on a per nuclear unit basis.
For the purposes of this test schedule, only valid tests conducted after the OL issuance date shall be incleded in the computation of the "last 100 valid tests." Entry into this test schedule shall be made at the 31 day test frequency.
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970-8--ELECTRICAL POWER SYSTEMS-a BASES 3/4.8.1 and 3/4.8.2 A.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during cperaUon ensures that sufficient power will be available to supply the safety related equipment required for (1) the safe shutdown of the facility and (2) the mitigation and control of accident conditions within the facility.
The minimum specified independent and l
redundant A.C. and D.C. power sources and distribution systems satisfy the requirements oi General Design Criteria 17 of Appendix "A" to 10 CFR 50.
l The ACTION requirements specified for the levels o' degradation of the power sources provide restriction upon continued facili.y operation commensurate with the level of degradation.
The OPERABILITY of the power sources are consistent with the initial condition assumptions of the accident analyses and are based upon maintaining at least Division I or II of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of one of the two onsite A.C. sources.
l Division III supplies the high pressure core spray (HPCS) system only.
The OPERAEILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refuel'ng ensures that (1) the facility can be maintained in the shutdown or refueling condition for with rhe extended time periods and (2) sufficient instrumentation and control esecreians capability is available for monitoring and maintaining the unit status.
notedin t
Appen6:5 The surveillance requirements for demonstrat*ng the OPERABILITY of'the ra ther5At diesel cenerators are in'accordance with the recommendations of Regulatory Guide 1.9,4 " Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971, Regulatory Guide T 108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977 (, and Regulatory Guide 1.137, " Fuel-Oil Systems for Standby Diesel Generators," Revision 1, October 1979).
g Inscrr A The surveillance requirements for demonstrating the OPERABILITY of the unit batteries are in accordance with the recommendations of Regulatory Guide 1.129, " Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Station and Substations."
Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage onfloat charge, connection resistance values and the performance of batterj service and discharge tests ensures the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity.
LA SALLE - UNIT 1 B 3/4 8-1
/.UE 6 1981
i i
l In.sertA Surveillance requirement +.8.1.1.2.a.+ acceleration time to soo rprn
+5%-3% s 11 seconds instead of sy suonds in order to verify tile i
diesel startin5 ability is not being degraded.
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