Text

Proposed Tech Specs Related to Ac Sources Operating
	ML20070M676
Person / Time
Site:	Vogtle
Issue date:	04/28/1994
From:	; GEORGIA POWER CO.
To:	;
Shared Package
ML20070M674	List: ML20070M671; ML20070M676;
References
	NUDOCS 9405020376
	Download: ML20070M676 (11)
	v • d • e

. - . ._- .- . . . . . .... .. .- .- . . .

r

'l ENCLOSURE 3

'VOGTLE ELECTRIC GENERATING PLANT REQUEST TO REVISE TECilNICAL SPECIFICATIONS RELATED TO AC SOURCES OPERATING PROPOSED TECIINICAL SPECIFICATION CIIANGES s .

I

'j

'I J

-3 l

- 9405020376 940428 PDR--.ADOCK- 05000424 P PDR

3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 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 of fsite transmission network and the onsite Class IE Distribution System, and

b. Two separate and independent diesel generators, each with:

1) A day tank containing a minimum volume of 650 gallons of fuel (52% of instrument span) (LI-9018, LI-9019),

2) A separate Fuel Storage System containing a minimum volume of 68,000 gallons of fuel (76% of instrument span) (LI-9024, LI-9025), and

3) A separate fuel transfer pump, APPLICABILITY: MODES 1, 2, 3, and 4.

ACTION:

a. With one offsite circuit of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C.

sources by performing Surveillance Requirement 4.8.1.1.1.a 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. If cithc. dicscl ge- "n+r M: net bccr cut cc: fully tc;tcd within thc past 2^ heure, der r:tr:tc it OPNS!LITY 4 p;rformin;; Curwille uc Rcc i , cm ~

4. 0.1. L 1 ' . ' nd " . 0.1.1. 2. c. 0 - f o r c och s uch J m 3 e i gc ac cet;F, upcra te'y , ithim 2^ Mur unles; the dic:c! ;;cncrator i; circedj Ta"'t4 9 Restore the offsite circuit to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months an invpereble wppotisyles onino4,0M4'Wfkr/44k C0"PMC080l'

b. With either iesel generator inoperable, demonstrate the OPERABILITY of the above requireo A.C. offsite sources by performing Surveillance Requirement 4.8.1.1.1.a 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. If the dit;sel generator became inoperable due to any cause other than preplanr.ed preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE diesel aenerator by perform-ing Surveillance Requirements 4.8.1.1.2..aF4 and 4.8.1.1.2.a.5 within

$ X hours *#j Restore the inoperable diesel generator to OPERABLE status M

within 72 h urs or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COL SHUTDOWN within the following 30 ho rs wksfAe geAeratW obwcc ofa n o%en.s/npoAvth/cowws meSt hilutNiMeJ (sm&ig dit tated.

This test is required to be completed regardless of when the inoperable ,

diesel generator is restored to OPERABILITY.

The diesel shall not be rendered inoperable by activities performed to support testing pursuant to the ACTIO.' Statement (e.g., an air roll).

I !

I V0 GILE UNITS - 1 & 2 3/4 8-1 '

i l

_ .. __ ~

an inoperable suytf sYl es on Ad p mkr//y khWe ceyw1/;y ~

ELECTRICA'l POWER SYSTEMS hfk ekswcc, ofmg/tw/At/ Chevnw1 awe is;/we. & He twswp kre/

LIMITING CONDITION FOR OPERATION d W M # M M M / d~ h d ACTION (Continued)

c. With one offsite cir uit a d one diesel generator of the above required-A.C. electrical pow- sou es inoperable, demonstrate the OPERABILITY of the remaining A. . off,ite source by performing Surveillance Re- '

quirement 4.8.1.1 .a w hin 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, f th diesel generator became inoperable due to any cause other than prep anned preventative maintenance or testing,-demon--

strate the OPERABI Y of the remaining OPERABLE diesel aenerator bv performing Surve ance Requirements 4.8.1.1.2. # and 4.8.1.1.2.a.5 b,{

within8go , unless the OPERABLE diesel generator is already operatingj Restore at least one of the inoperable sources to 0PERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore the other A.C. power source (offsite circuit or diesel generator) to OPERABLE status in accordance with the provisions of 3.8.1.1, ACTION Statement a or b, as appropriate, with the time requirement of that ACTION Statement based on the time of initial loss of the remaining inoperable A.C. power source.

OPERABILITY per Surveillance Requirements 4.8.1.1.2.aFr4 andA successfu 4.8.1.1.2.a.b performed under the ACTION Statement for an OPERABLE. ;

diesel generator or a restored to OPERABLE diesel generator satisfies the diesel generator test requirement of ACTION Statemente b.

d. With one diesel generator inoperable in addition to ACTION b, or c.

above, verify that:

1. All required systems, subsystems, trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emergency power are also OPERABLE, and

2. When in MODE 1, 2, or 3, the steam-driven auxiliary feedwater pump is OPERABLE. '

If these conditions are not satisfied within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and-in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . '

a

e. With two of the above required offsite A.C. circuits inoperable, i..a. '

-str:t: th: OPEPACILITY ;f ta diesel 3m m . m . . my;r;i:!) O ri ivi m

, H; t" evi r-tc c f Spec i'f ec ti on i. 0.1.1. 2. :. ;nd i . 0.1.1. E. a.1 ithin 0 h:ur?, rin, um d L ? ;:ncr:ter: cre 21re:dy ;:r;t..3, restore at least one of the inoperable offsite sources to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . Following restoration of one offsite source,-follow ACTION Statement'a with the time requirement of that ACTION-Statement based

This test is required to be completed regardless of when the inoperable EDG is restored to OPERABILITY.

The diesel shall not be rendered inoperable by activities performed to support testing pursuant to the ACTION Statement (e.g., an air roll).

v0GTLE UNITS - 1 & 2 3/4 8-2

' . ._-- _ _2

. j I

l ELECTRICAL POWER SYSTEMS 4

LIMITING CONDITION FOR OPERATION l ACTION (Continued) on the time of the initial loss of the remaining inoperable offsite a.c. circuit. A 3ucce;sful tc;t(s) of J; caul C" Cf"! LIT" per km m;'

'an;c Ccquir==t: '.9.1.1.2. .i :nd 0.9.1.1.2.2.5 perform;d muJc,

-thi; ACTICN Ctatc;;nt for th: OPE".T E dien.h ::ti;fim thm u.od

cr: rate: t v i. icqu;iemcut. for ACTICN Ctatc; cat a.

f. With two of the above required diesel generators inoperable, demonstrate the OPERABILITY of two offsite A.C. circuits by performing the require-ments of Specification 4.8.1.1.1.a. 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; restore at least one of the inoperable diesel-generators to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Following restoration of one diesel generator unit, follow ACTION Statement b with the time requirement of that ACTION Statement based on the time of initial loss of the remaining inoperable diesel generator. A successful ty t nf riiesel OPFRARif TTY -

per Surveillance Requirements 4.8.1.1.2..aGi and 4.8.1.1.2.a.5 performed under this ACTION Statement for a restored to OPERABLE diesel satisfies the diesel generator test requirements of ACTION Statement b.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class 1E Distribution System shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, and indicated power availability.

4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE:

a. In accordance with the frequency specified in Table 4.8-1 on a STAGGERED TEST BASIS by:

1) Verifying the fuel level in the~ day tank (LI-9018, LI-9019),-

2) Verifying the fuel level in the fuel storage tank (LI-9024, LI-9025),

3) Verifying the fuel transfer pump starts and transfers fuel from the storage system to the day tank, Acct /cro/t.r /0 Af M4.r/ g@ MMMM at

4) Verifying he diesel starts #an th;t '50 generator voltage-and frequency 4160 + 170, -135 volts and 60 + 1.2 Hz..it h 11." ;cc n t* Ofter th: ;ta,t a wool. The diesel generator shall be started for this test by using one of the following signals:

All diesel generator starts for the purpose of surveillance testing as required

by Specification 4.8.1.1.2 may be preceded by an er.gine prelube period as recommended by the manufacturer so that the mechanical stress and wear on the diesel engine is minimized.

V0GTLE UNITS - 1 & 2 3/4 8-3

ELECiRICAL POWER SYSTEMS onCl 0 WokJ dl MiJ l00dtccod/hp,1 SURVEILLANCE REQUIREMENTS (Continued) 1

2) Verifyingthegeneratorissynchronized,1kadedtoanindicated value ;f 0100 7000 V" k L.m Uac. n 4 :1 t: 50 :::=t ,

W M "1th : ic;.J of 6800-7000 kW***'for.at j least 60 minutes.

This test, if it is performed so it coincides with the testing required by Surveillance Requirement 4.8.1.1.2.a.5, may also serve to concurrently meet those requirements as well.

h. At least once per 18 months,** during shutdown, by:

1) Subjecting the diesel to an inspection in accordance with proce-dures prepared in conjunction with its manufacturers' recommenda-tions for this class of standby service;

2) Verifying the diesel generator capability to reject a load of greater than or equal to 671 kW (motor-driven auxiliary feedwater pump) while maintaining voltage at 4160 + 240, -410 volts and speed of less than 484 rpm (less than nominal speed plus 75%

of the difference between nominal speed and the Overspeed Trip Setpoint); and recovering voltage to within 4160 + 170, -410 volts within 3 seconds.

3) Verifying the diesel generator capability to reject a load of 7000 kW without tripping. The generator voltage shall not exceed 5000 volts.during and following the load rejection;

4) Simulating a loss-of-offsite power by itself, and:

a) Verifying deenergization of the emergency busses and load shedding from the emergency busses, and b) Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 11.5 seconds,* energizes the auto-connected shutdown loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 +170, -410 volts and 60 + 1.2 Hz during this test.

5) Verifying that on an ESF Actuation test signal, without loss-of-offsite power, the diesel generator starts

on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 4160

+170, -135 volts and 60 1 1.2 Hz within 11.4 seconds after the

All engine starts for the purpose of surveillance testing as required by Specification 4.8.1.1.2 may be preceded by an engine prelube period as recom-mended by the manufacturer to minimize mechanical stress and wear on the diesel engine.

- For any start of a diesel, the diesel must be operated with a load in accor-dance with the manuf acturer's recommendations.

- - This band is meant as guidance to avoid routine overloading of the engine.

Loads in excess of this band or momentary variations due to changing' bus loads shall not invalidate this test.

V0GTLE UNITS - 1 & 2 3/4 8-6

SURVEILLANCE RE0VIREMENTS auto-start signal; the steady-state generator voltage and frequency shall be maintained within these limits during this test;

6) Simulating a loss-of-offsite power in conjunction with an ESF Actuation test signal, and:

a) Verifying deenergization of the emergency busses and load shedding from the emergency busses; b) Verifying the diesel starts on the auto-start signal, ener-gizes the emergency busses with permanently connected loads within 11.5 seconds,* energizes the auto-connected emergency (accident) loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After energization, the steady-state voltage and frequency of the emergency busses .

shall be maintained at 4160 +170, -410 volts and 60 i 1.2 Hz I during this test; and c) Verifying that all automatic diesel generator trips, except engine oversp"eed, low lube oil pressure, high jacket water temperatures and generator differential, are automatically bypassed upon loss of voltage on the emergency bus concurrent with a Safety Injection Actuation signal.

7) Verifying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the diesel generator shall be loaded to an indicated 7600 to 7700 kW,** and during the remaining 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to an indicated 6800-7000 kW.** The generator voltage and frequency shall be 4160 + 170, - 135 volts 'and 60 i 1.2 Hz within 11.4 seconds after the start signal; the steady-state generator voltage and frequency shall be 4160 + 170, -410 volts and 60 i 1.2 m ; ..- oftc : =plet!7 tFi; 44=

Hz during this test. "ithir

' e r + M h perfor& Spec 4#icitier ' ? 1 1. :. 7 l 1456RT - u 9/) Verifying that the auto-connected loads to each diesel generator do not exceed the continuous rating of 7000 kW; p/) Verifying the diesel generator's capability to:

All engines starts for the purpose of surveillance testing as required by Specification 4.8.1.1.2 may be preceded by an engine prelube period as.

recommended by the manufacturer to minimize mechanical stress and wear on the diesel engine.

- This band is meant as guidance to avoid routine overloading of the engine.

Loads in excess of this band or momentary variations due to changing bus loads shall not invalidate the test.

Failure to maintain voltage and frequency requirements due to grid disturbances does not render a 24-hour test as a failure, f'If Spai ficeti= d ?.1.1 h." h =t athfeutu 11, c=phtd, it i; ' uJt '

l

c m ry te rep nt th:. p, a ney ve-nuu. 6;;t. beted ,"

scrareter my bc ep; rated at th; had r: wired h" ' n : < % . -...M j l

' C.1.1.E.e; ivi

. o u. . n i ,i,s, e f- ha..

1. 1. The high jacket water temperature trip may be bypassed.

V0GTLE UNITS - 1 & 2 3/4 8-7 Amendment No. 58 (Unit 1)

Amendment No. 37 (Unit 2) u

INSERT FOR PAGE 3/4 8-7

8) Verifying the diesel generator starts and that the generator voltage and frequency are 4160

+170, -135 volts and 60 i 1.2 Hz within 11.4 seconds. This surveillance shall be performed within 5 minutes of stopping the diesel generator aller having operated for a minimum of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months loaded to an indicated 6800 - 7000 kw. Momentary transients outside of the load range do not invalidate this test.

1 u

l

l TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE m Number in Last f(296 Failures Numbefof Ffilures/n !a'id-LasY20 Valid Tep(s* _

p Te ne* Test Frequency

/ ,

, LDemands -

_1 5 p .3 Once per 31 days

~> 2* / ~/fh

> Once per 7 days N

/ - -

(.b Q no if55 -f64% E4 hWff) ,

l Ad i de.mancis, rIA

Criteria for determining number of/\ failures a d number of va':2 tit: shall be in accordance with-Regulatory Position C.2.f of Regulatory Guide 1.'100,kWl'58'04 3j but determined on a per diesel generator basis.

For the urposes of de rmini g the r quired est frequency, the previous test ilure unt m be r uced t zero a comple . diesel verha to like new co ition s co eted, ovide hat the erhaul neludi g appro pr' ate po -mai nanc operat n and sting, is pecifi ly app ved by le ma actu r an if acce able r iability as been emonstr ed. Th reli 111ty rite on shal be the uccessfu complet n of 14 nsecut' e '

ter.s in sin serie Ten o these tee s shall e in acc dance th the utinef urva' lance quireme s 4.8.1. .2.a.4 a 4.8.1.1 c.a.5 a four teste'in a ordance 'ith th 84-day t ting re irement Survei ance Re irem t 4.8.1 . 2. f . f this cr' erion not sati ied dur'ng the irst c rie. f tests any al rnate cri erion t e used t transva e the ailure j cou . to Zero eonirm NPF nnnenuni '

pet.sfrom shnd by Condiiions QY lMN ~ (W1 Y6MQnd$ {

- The associat d test frequency shall be maintained until seven consecutive failure free &m: m have been performed, and the number of '- ' '

' n' 20 valid dumanda haa Luer, rcduced t,, ar,e, I l

l' V0GTLE UNITS - 1 & 2 3/4 8-9

~

i ELECTRICAL PDWER SYSTEMS SURVEILLANCE RE00lREMENTS (Continued) a) Synchronize with the offsite power source while the generator is loaded with its emergency loads upon a simu-lated restoration of offsite power, b) Transfer its loads to the offsite power source, and c) Be restored to its standby status.

jj )6) Verifying that with the diesel generator operating in a test mode, connected to its bus, a simulated Safety Injection signal overrides the test mode by: (1) returning the diesel generator to standby operation, and (2) automatically energizing the emergency loads with offsite power; Jg)() Verifying that the fuel transfer pump transfers fuel from each fuel storage tank to the day tank of each diesel via the installed cross-connection lines; f3 )() Verifying that the automatic load sequence timer is OPERABLE with the interval between each load block within 10% of its design interval;

i. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting both diesel generators simultaneously, during shutdown, and verifying that both diesel generators accelerate to at least 440 rpm in less than or-equal to 11.4 seconds; and i

j. At least once per 10 years by:

1) Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypochlorite solution, or equivalent, and

2) Performing a pressure test of those portions of the diesel. fuel oil system designed to Section III, subsection ND of the ASME-Code at a test pressure equal to 110% of the system design pressure.

. Reports - All diesel generator failures, valid or be repor 2 Commissi pecification 6.8.2 within 30 days. M'on in a iesel-Special gen.r Report . shall include the informa-tion recommended in Regula". r .. of Regulatory Guide 1.108,' Revi-sion 1, August 197 -

.. r of last!100 valid tests on-a per nucle ' asis is greater than or equal , et shall-be i supp' to include the additional information recommended tory '

apfP on C.3.b of Regulatory Guide 1.108, Revision 1, August 1977. -

V0GTLE UNITS - 1 & 2 3/4 8-8

r ELECTRICAL POWER SYSTEMS A.C. SOURCES s SHUTDOWN LIMITING CONDITION FOR OPERATION

3. 8.1. 2 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a.

One circuit between the offsite transmisiton network and the Onsite Class IE Distribution System, and

b. One diesel generator with:

o.

1) A day tank containing a minimum volume of 650 gallons (52% of instrument span) (LI-9018, LI-9019) of fuel,

2) A fuel storage system containing a minimus volume of 68,000 gallons of fuel (76% of instrument span) (LI-9024, LI-9025), and

3) A fuel transfer pump.

APPLICABILITY: MODES 5 and 6.

ACTION:

With less than the above minimum required A.C. electrical power sources OPERABLE, immediately suspend all operations involving CORE ALTERATIONS, positive re-activity changes, movement of irradiated fuel or crane operation with loads over the fuel storage pool, and provide re capability for the Reactor Cooiant System in accordance with Specificat wo 3.4.9.3. In addition, when in MODE 5 with the reactor coolant loops not filled, or in MODE 6 with the water level less than 23 feet above tM reactor vesse! flange, immediately initiate !

corrective action to .'estore th, required sources to OPERABLE status as soon as possible. ,

{

VEILLANCE REQUIREMENTS 4.8.1.2 The above required A.C. electrical power sources shall be demonstrated 9PERABLE by the performance of each of the requirements of Specifications 4.8.1.1.1gL4.8.1.1.2 (except for Specification 4.8.1.1.2a.5). =d d ? .1.10.

as f

V0GTLE UNIT! - 1 & 2 3/4 8-10

F ,

, 3/4.& ELECTRICAL POWER SYSTEMS BASES 3/4.8.1, 3/4.8.2, and 3/4.8.3 A.C. SOURCES, D.C. SOURCES, and ONSITE POWER DISTRIBUTION The OPERABILITY of the A.C. and D.C power sources and associated distribu-tion systems during operation 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 redundant A.C. and D.C.

power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix A to 10 CFR Part 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operat' q commensurate with the level of degradation. The OPERABILITY of the power sources are con-sistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least one redundant set of 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 the other onsite A.C. source. The A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.93, " Availability of Electrical Power Sources," December 1974 and Appendix A to Generic Letter 84-15, " Proposed Staff Position to Improve and Maintain Diesel Generator Reliability." When one-diesel generator is inoperable, there is an additional ACTION requirement to >

verify that all required systems, subsystems, trains, components and devices, that depend on the remaining OPERABLE diesel generator as a source of emergency power, are also OPERABLE, and that the ster.m-driven auxiliary feedwater pump is OPERABLE. This requirement is intended to mvids assurance that a loss-of-offsite power event will not result in a ce .te loss of safety function of critical systems during the period one of ta diesel generators is inoperable.

The term, verify, as used in this context means to administrative 1y check by '

examining logs or other information to determine if certain components are ,

out-of-service for maintenance or other reasons. It does not mean to perform the Surveillance Requirements needed to demonstrate the OPERABILITY of the component. >

The' OPERABILITY of the mi_nimum specified A.C. and D.C. power sources and asv.iated distribution systems during shutdown and refueling ensures that:

(1) the facility can be maintained in the shutdown or refueling condition for extended time periods, and (2) sufficient instrumentation and control.capa--

bility is bvailable forr-m nitoring and maintaining say kMufim,m/k% the unit stag 6ex^rfor14thb/or ofEimescy i The Surveillance Requirements for demonstratYng the OP.ERABILITY of the CAJ/l8 . 3 diesel gt erators are based on the re' m aendations of Regulatory Guides 1.9,

@hAtSt. - ' '

' ",, e}ecgong pgam y; gyoug {g1gg ((

i m w : =

- ., _..... n. rm,

=-e....,_=.,_,m,w n, _v =, . =. . . , =_ . =. _=, . . .

~

M. p t E77; and 1.137, " Fuel-011 Systems for Standby Diesel Generators,"L . g .j Revision 1, October 1979, Appendix A to Generic Letter 84-15;ea4 Generic Letter 7 8 U (

83-26, " Clarification of Surveillance Requirements for iesel fuel Impurity, R L ve1 Tests'"ths eneric Le& 93-0S " Mr.-Ifsm edniufS eciRcsdW .

If[UN &. M/ 8k "

J ') #

/MI'W t

ML20070M676

Text

Navigation menu

Search