ML20206Q974

Proposed Tech Specs,Changing 861114 Request for Amend to License NPF-42 for Facility to Achieve Overall Improvement in Emergency Diesel Generator Reliability & Availability

ML20206Q974
Person / Time
Site:	Wolf Creek
Issue date:	04/17/1987
From:	WOLF CREEK NUCLEAR OPERATING CORP.
To:
Shared Package
ML20206Q922	List: ML20206Q917 ML20206Q974
References
TAC-63951, NUDOCS 8704220074
Download: ML20206Q974 (13)

Text

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Attachment I to ET 87-0154 Pcgo 1 cf 11 April 17, 1987 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 offsite transmission network and the Onsite Class 1E Distribution System, and

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

1) A separate day tank containing a minimum volume of 390 gallons ,

of fuel,

! 2) A separate Fuel 011 Storage System containing a minimum volume g i of 85,300 gallons of fuel, and I

I 3) A separate fuel transfer pump.

APPLICABILITY: MODES 1, 2, 3, and 4 ACTION:

a. With an offsite circuit of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining offaite A.C. aource by performing Spootfloation 4.8.1.1.1 within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter. If either diesel generator of the above required A.C. electrical power sources haa not been avocessfully tested within the past 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> demonstrate OPER&BILITY by performing Spootfication 4.8.1.1.2a.4) #f separately for that diesel generator within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. 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 /> or be in at least 110T STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

ff The automatio_ start and sequence loading of a diesel _ generator satisfies the, testing requirements of Speoirication 4.8.1.1.2a.4) for this Action Statement.

WOLF CREEK - UNIT 1 3/4 8-1 0704220074 070417 P DFi ADOCK ODOOO4BP P P DF4

! Att :hment I to ET 87-0154 P:ga 2 of 11 April 17, 1987 l

t ELECTRICAL POWER SYSTEMS

! LIMITING CONDITION FOR OPERATION ACTION (Continued)

b. With one diesel generator of the above required A.C. electrical l power sources inoperable, demonstrate the OPERABILITY of the offsite A.C. sources by performing Spootfication 4.8.1.1.1 within 1 l hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter. Demonstrate the OPERABILITY of the remaining OPERABLE diesel generator by f performing Spootfication 4.8.1.1.2m.4) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />'; restore

the inoperable diesel generator to OPERABLE status 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 NOT STAND 8Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

l

o. With one offsite circuit and one diesel generator of the above l

required A.C. electrical power sources inoperable, demonstrate the

! OPERABILITY of the remaining offsite A.C. source by performing l Specification 4.8.1.1.1 within I hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />

( thereafter and Specification 4.8.1.1.2a.4) #d within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />

• on l the redundant diesel generatorg restore at least one of the l inoperable 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 STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Restore the remaining A.C.

electrical power source (offsite otrouit or diesel generator) to OPERABLE in accordance with Specification 3.8.1.1 ACTION a. or ACTION b. as applicable with the time requirement for the ACTION based on the time of the initial loss of the remaining inoperable A.C. electrical power source. A successful test of diesel generator OPERABILITY performed in accordance with ttpecification 4.8.1.1.2a.4) #_f, under this ACTION for an OPERABLE diesel generator or a diesel generator that was restored to OPERABLE, satisfies the subsequent testing requirement of Specification 3.8.1.1 ACTION a.

or ACTION b. for an OPERABLE diesel generator.

1. This test is required to be completed regardless of when the inoperable diesel generator is restored to OPERADLE status unless the diesel was l declared inoperable to do preplanned pr;eventative maintenance, testing,_

or maintenance to correct a condit. ion which, if left _ uncorrected, would not affect the operability _of the diesel generator.

1. 1. The automatio start and sequence _ loading of n_ diesel generator satisfies the testing requirements _of Specification 4.8.1.1.2a.4) for this Action Statement.

l WOLF CREEK - UNIT 1 3/4 8-2 e.______________________________________________-.__________

. Attachment I to ET 87-0154 P g? 3 cf 11 April 17, 1987 ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION ACTION (Continued)

d. With one diesel generator inoperable in addition to Ae, TION b or o 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 <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />,

e. With two of the above required offsite A.C. circuits inoperable, demonstrate the OPERABILITY of two diesel generators by sequentially performing Specification 4.8.1.1.2a.4) within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> unless the diesel generators are already operating restore at least one of the inoperable offsite sources to OPERABLE 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 STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Following restoration of one offsite A.C. electrical power source, follow ACTION a. above with the time requirement of ACTION

a. based on the time of the initial loss of the remaining inoperable offsite A.C. electrical power source. A successful test of diesel generator OPERABILITY performed in accordance with Specification 4.8.1.1.2a.4) ## under this ACTION for the OPERABLE diesel generators, satisfies the subsequent testing requirement of specification 3.8.1.1 ACTION a.

f. With two of the above required diesel generators inoperable, demonstrate the OPERABILITY of two offsite A.C. circuits by performing Specification 4.8.1.1.1 within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter restore at least one of the inoperable diesel generators to OPERABLE status within 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 STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Following restoration of one diesel generator follow ACTION b. with the time requirement of the ACTION based on the time of initial loss of the remaining inoperable diesel generator. A successful test of _.

diesel generator,__ operability,_ performed in accordance with Specification 4.8.1.1.2a.4) under this ACTf0N for the OPERABLE diesel generators, satisifes the subsequent , testing requirement of Sgeoirtoation_3 8.1.1 ACTION b.

1. 1. The nutomatio _ start and sequence loading of a__ diesel, generator satisfies the testing requirements of Spectriention 4.8.1.1.2a.4) for this Action Statement.

WOLF CREEK - UNIT 1 3/4 8-3

Attachment I to ET 87-0154 P:go 4 cf 11 April 17, 1987 ELECTRICAL POWER SYSTEMS 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 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,

2) Verifying the fuel level in the fuel storage tank,

3) Verifying the fuel transfer pump starts and transfers fuel from the storage system to the day tank,

4) Verifying the diesel starts and accelerates to at least 514 rpm in less than or equal to 12 seconds.es The generator voltage and frequency shall be 4160 + 160 - 420 volts and 60 1 1.2 llz within 12 seconds" after the start signal. The dienel generator shall be started for this test by using one of the following signals:

1 a) Manual, or l

l 5) Simulated loss-of-offsite power by itself, or c) Safety Injection test signal.

5) Verifying the generator is synchronized, gradually loaded to an_

indiented 6000 to 6201 kW ese for at least 60 minutes, and

1. 1. This test shall be_ E cceded_by an engine prelube_ ported _and/or_.other warmup procedures recommended by the manufnoturer so that the mechanioni stress and_ wear __on the diese_1 engine is minimized.

een This band is meant _as guidance to avoid routine ___ overloading of the_

en61ne. Lo_nds in excess of this band _ for_ specinQesting under direct monitoring or momentary _ var _intions due___to_chanding bus _lnads shall not invalidnte this test.

WOLF CREEK - UNIT 1 3/4 8 4

I Attachment I to ET 87-0154 P go 5 cf 11 April 17, 1987 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

6) Verifying the diesel generator is aligned to provide standby power to the associated emergency busses.

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 I hour by checking for and removing accumulated water from the day tanks

o. At least once per 31 days by checking for and removing accumulated water from the fuel oil storage tanks andt

d. By sampling new fuel oil in accordance with ASTM D4057 prior to addition to storage tanks andt

1) Dy verifying in accordance with the tests specified in ASTM E D975-81 prior to addition to the storage tanks that the samplo hast a) An API Gravity of within 0 3 degrees at 60 F or a specific gravity of within 0.0016 at 60/60 F, when compared to the supplier's certificate or on absolute specific gravity at 60/60 F of greater than or equal to 0.83 but less than or equal to 0.89 or an API gravity of greater than or equal to 27 degrees but less than or equal to 39 degreest b) A kinematio viscosity at 40 C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 contistokes, if gravity was not determined by comparison with the supplier's certiftoations c) A flash point equal to or greater than 125 F: and d) A clear and bright appearance with proper color when tested in accordance with ASTM D4176-82.

2) By verifying within 30 days of obtaining the sample that the other properties specified in Table 1 of ASTM D975-81 are met when tested in accordance with ASTH D975-81 except that the analysis for sulfur may be performed in accordance with ASTM D1552-790 or ASTM D2622-82.

e. At least once every 31 days by obtaining a nample of fuel oil in accordance with ASTM D2276-78, and verifying that total particulate contamination is less than 10 mg/ liter when checked in nocordance with ASTH D2276-78, Method A.

WOLF CREEK - UNIT 1 3/4 0-5

, Attachment I to ET 87-0154 P go 6 cf 11 April 17, 1987 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

f. At least once per 184 days the diesel generators shall be startedif f from ambient conditions (using the keep warm system) using one of the signals specified in 4.8.1.1.2a.4) and accelerated to at least 514 rps in less than or equal to 12 seconds. The generator voltage and frequency shall be 4160 + 160 - 420 volts and 60 1 1.2 Hs within 12 seconds after the start signal. Subsequently verify the generator is loaded to an indicated 6000 to 6201 kW'M in less than or equal to 60 seconds and operates at an indicated load of 6000 to 6201 kW "' for at least, 60 minutes.

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

1) Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with 1*.s manufacturer's recommendations for this class of standby servloe,

2) Verifying the diesel generator capability to reject a load of {

greater than or equal to 1352 kW (ESW pump) while maintaining voltage at 4160 + 160 - 420 volts and frequency at 60 1 5.4 !!z,

3) Verifying the diesel generator capability to reject a load of 6201 kW without tripping. The generator voltage shall not exceed 4784 volts during and following the load rejection,

4) Simulating a loss-of-offsite power by itself, ands 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 12 seconds, energizes the auto-connected shutdown loads through the shutdown sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energitation, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 + 160 - 420 volts and 60 1 1.2 Ha during this test.

~

iin This te t n5n11 be preceded _by_an_angt_ne_prelube_ period and/or other Wa.ry p_pr,oonduren recy monied _by,th_o_manurnoturer no that the mechantoni strens and wone on the dfanni enUnn ITmintmt_zad, see This band in__ meant an guidance to avoid routine overloading of the

~ ~~

en tne. 'G ada in encans or'IEin band Nr gootal t_enting unfer direot mon _ttor1,n L or momentalvariattons due to changing hun __ loads nTall not LarliAs__tbtataat- -

fif This tant shall be p,r_condad ,by_n,n_nngine_ prelubn _per_tod no that the mechanton1 strens and__wenr on the diesel _en[tne in mintmtfad.

W0lf CREEK - UNIT 1 3/4 8-6

Attachment I to ET 87-0154 Pcg2 7 cf 11 April 17, 1987 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

S) Verifying that on a Safety Injection test signal without loss-of-offsite power, the diesel generator startsee on the auto- .

start signal and operates on standby for greater than or equal  !

to 5 minutes; and the offsite power source energizes the auto- (

connected emergency (accident) load through the LOCA sequencer. The generator voltage and frequency shall be 4160 +

160 -

420 volts and 60 1 1.2 Hz within 12 seconds after the  ;

auto-start signal the generator steady-state generator voltage \

and frequency shall be maintained within those limits during ,

this test;

6) Simulating a loss-or-offsite power in conjunction with a Safety f' Injection test signal, and a) Verifying deenergization of the emergency busses and load shedding from the emergency busses; b) Verifying the diesel startsee on the auto-start signal, energizes the emergency busses with permanently connected loads within 12 seconds, energizes the auto-connected emergency (accident) loads through the LOCA sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with emergency loads. After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 + 160 - 420 volts and 60 1 1.2 Hz during this test; and c) Verifying that all automatio diesel generator trips, except high Jacket coolant temperature, engine overspeed, low lube oil pressure, high crankcase pressure, st. art failure relay, and generator differential, are automatically bypassed upon i loss of voltage on the emergency buss concurrent with a l Safety Injection Actuation signal, as Tht_n_ Jest t __shn11 he preceded by on engineJ relube period and/or other wn,rnunrocedures recommended _by the manufnet_urer_so that the _mechantoni stress and wear on the diesel en6tne is minimized.

WOLF CREEK - UNIT 1 3/4 8-7

Attachment I to ET 87-0154 P g3 8 cf 11 April 17, 1987 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

7) 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 />.

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 shall be loaded to an indicated 6600 to 6821 kW ###and during 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 be loaded to an indicated 6000 to 6201 kW ##8 The generator voltage and frequency shall be 4160 + 160 - 420 volts and 60 +

1.2 Hz, - 3 Hz within 12 seconds after the start signal; the steady-state generator voltsgo and frequency shall. be maintained within 4160 + 160 - 420 volts and 60 1 1.2 Hz during this test. Within 5 minutes after completing this 24-hour test, perform Specification 4.8.1.1.2g.6)b)#3

8) Verifying that the auto-connected loads to each diesel generator do not exceed 6201 kW;

9) Verifying the diesel generator's capability tot a) Synchronize with the offsite power source while the generator is loaded with its emergency loads upon a simulated restoration of offsite power, b) Transfer its loads to the offsite power source,and o) Be restored to its standby status.

10) 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 powers

1. If Specification 4.8.1.1.2g6)b) is not satisfactorily completed, it is not necessary to repeat the preceeding 24-hour test. Instead, the diesel generator may be operated at 6201 kW for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or until operating temperature has stabilized.

ese This band is meant as guidance to avoid routine overloading of the engine. Loads in excess _of_ this band for special testing under direct "onitoring or momentary variations due to changing bus loads shall not

@vlidatethistest.

WOLF CREEK - UNIT I 3/4 8-8

+

Attachment I to ET 87-0154 Pcga 9 of 11 April 17, 1987 -

ELECTRICAL POWER SYSTEMS l i

SURVEILLANCE REQUIREMENTS (Continued)

11) 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; and

12) Verifying that the automatic LOCA and Shutdown sequence timer is OPERABLE with the interval between each load block within + 10% of its design interval.

h. 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 514 rpm in less than or equal to 12 seconds; and

i. At least once per 10 year 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.

4.8.1.1.3 Reports - All diesel generator failures, valid or nonvalid, shall be reported in a Special Report to the Commission pursuant to Specification 6.9.2 within 30 days. Reports of diesel generator failures shall include the information recommended in Regulatory Position C.3.b of Regulatory Guide 1.108, Revision 1, August 1977. If the number of failures in the last 100 valid tests (on a per nuclear unit basis) is greater than or equal to 7, the l 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.

1. 1. This test shall be preceded by an engine prelube period and/or other warmup procedures recommended by the manufacturer so that the mechanical stress and wear on the diesel engine is minimized.

WOLF CREEK - UNIT 1 3/4 8-9

~

, Attachment I to ET 87-0154 Pcg2: 10 of 11 April 17, 1987 TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE Numbers of Failures in Number of Failure in Last 20 Valid Tests @ Last 100 Valid Tests @ Test Frequency

<1 <4 At least once per 31 days

-> 2@@ ->5 At least once per 7 days I

l 1

l 9 Criteria for determining number of valid failures and number of valid tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.1.08, Revision 1, August 1977, but determined on a per diesel generator basis. For the purposes of determining the required test frequency, the previous test failure count may be reduced j to zero if a complete diesel overhaul to like-new conditions is completed, provided that the overhaul including appropriate post-l maintenance operation and testing, is specifically approved by the manufacturer, and if acceptable reliability has been demonstrated. The reliability criterion shall be the successful completion of 14 consecutive tests in a single series. Ten of these tests shall be in accordance with Specification 4.8.1.1.2a.4) and 4.8.1.1.2a.5), four tests, in accordance with Specification 4.8.1.1.2f. If this criterion is not satisfied during the first series of tests, any alternate criterion to be used to transvalue the failure count to zero requires NRC approval.

99 The associated test frequency shall be maintained until seven consecutive failure free tests have been performed and the number of failures in the last 20 valid tests has been reduced to one.

WOLF CREEK - UNIT 1 3/4 8-10

• ~

. LAttechnent'I to ET 87-0154~ Pcgs 11 of 11 April :17. - 1987

~

3.4.8 ELECTRICAL POWER-SYSTEMS E

. - 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 AJC.. and D.C. power sources and associated' .

distribution systems during operation ensares 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 operation commensurate b with the level of degradation. The OPERABILITY of the power sources are

, consistent 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 i~ accident conditions. coincident with an assumed loss-of-offsite power and b single failure of the other onsite A.C. source. The A.C. and D.C. ~ source allowable. out-of-service Ltimes are based on Regulatory Guide. 1.93,

. " Availability of Electrical Power Sources", December 1974. . 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 steam-driven auxiliary feedwater pump is OPERABLE. This requirement is intended to provide assurance that a loss-of-offsite power event.will not result in a complete ~1oss of. safety function

of critical systems during the period one . of the diesel generators is inoperable. The -term verify as used in this context means . to .

l administratively- 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 j demonstrate the OPERABILITY of the component.

. The OPERABILITY of the minimum specified A.C. and D.C. power sources .and

[

- associated _ 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

. capability are available for monitoring and maintaining the unit status.

p The Surveillance Requirements for demonstrating the OPERABILITY of the ,

i diesel generators are in accordance with the recommendations of Regulatory Guides 1.9, " Selection of Diesel Generator Set Capacity for Standby Power

( Supplies," March 10, 1971, 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants,"

i -Revision 1, August'-1977 as modified by Amendment No. issued j  : on , and 1.137, " Fuel-Oil Systems for Standby Diesel Generators,"

l -Revision 1, October 1979.

I-WOLF CREEK - UNIT 1 B 3/4 8-1 L

I s

~ ---.;, -. - - - - - , . , . .-. _ _ . ,....-. - .- - - .

, April 17, 1987 ATTACHMENT II TO ET 87-0154 i DESCRIPTION OF CHANGES This attachment describes the changes to the proposed Technical Specification 3/4.8.1 originally transmitted by letter dated November 11,1986 (KMLNRC 86-212). These changes are considered minor in nature and are consistent with the conclusions of the Safety Evaluation and Significant Hazards Consideration transmitted by the aformementioned letter.

1. Actions 3.8.1.1.a , 3.8.1.1.c, and 3. 8.1.1.e A ff footnote has been added to clarify that for the purpose of these action statements, an automatic start and sequence loading of the D/G satisfies the testing requirements of 4.8.1.1.2a.4).

Surveillance 4.8.1.1.2a.4) verifies that the diesel starts and accelerates to rated speed and voltage within 12 seconds.

2. Actions 3.8.1.1.b and 3.8.1.1.c The # footnote has been revised to clarify that the testing of the OPERABLE D/G is not required when a diesel is declared inoperable to do preplanned preventive maintenance, testing, or maintenance to correct a condition which, if left uncorrected, would not affect the operability of D/G.

3. Action 3.8.1.1.e This action statement is applicable when two offsite circuits are inoperable. The statement has been changed to clarify that the demonstration of D/G- operability under 4.8.1.1.2.a.4) is to be performed sequentially for the two diesels.

4 Surveillances 4.8.1.1.2a.5), 4.8.1.1.2g.7)

These surveillance requirements have been changed to require the D/G be tested to a range near the rated load rather than to 60% of rated load as proposed in the original Amendment request.

The *** footnote addresses testing of the D/G at a range near 1005 rated load to prevent routine overloading of the D/G.

5. Surveillance 4.8.1.1.2g This change reverts to the original specification wording.

6. Surveillance 4.8.1.1.2f, ### footnote, and *** footnote This surveillance requirement and en footnote have been revised to clarify that the test will be performed from ambient conditions using one of the signals specified in 4.8.1.1.2a.4). Ambient conditions are clearly identified as using the keep warm system, and the ### footnote requires the test be preceded by an engine prelube period.

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Attb he:nt II to ET 87-0154 P gs 2 of-2

. April 17,l1987

7. -Table 4.'8-1 This G footnote addresses the requirements'to reduce the previous test- failure count. to zero.. The post-maintenance operation and testing is to be specifically approved by the manufacturer. An additional sentence .has been added to the 8 footnote.to clarify-that if the first series of tests is not satisfied,'NRC approval is required of any alternate criterion to reduce the failure count to Zero.

The 14 consecutive test series include ten tests in accordance with :

Specifications 4.8.1.1.2a.4) and 4.8.1.1.2a.5). .These include starting.the diesel, gradually loading to 100% rated -load and operating it for one hour. Four of the fourteen tests are to be in accordance with 4.8.1.1.2f, which in addition, loads the D/G within 60 seconds.-

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