Text

Proposed Changes to Tech Spec 3/4.8.1 to Achieve Overall Improvement in Diesel Generator Reliability & Availability
	ML20213G655
Person / Time
Site:	Wolf Creek
Issue date:	11/14/1986
From:	; KANSAS GAS & ELECTRIC CO.
To:	;
Shared Package
ML20213G654	List: ML20213G651; ML20213G655;
References
	TAC-63951, NUDOCS 8611180249
	Download: ML20213G655 (19)
	v • d • e

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3/4.8 ELECTRICAL POWER SYSTEMS s

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:

Two physically independent circuits between the offsite transmission a.

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 callons of fuel, 2)

A separate Fuel Oil Storage System containing a minimum volume of 85,300 gallons of fuel, and 3)

A separate fuel transfer pump.

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

ACTION:

a.

With cither an offsite circuit er dic c! gcncratcr of the above re uired A.C. electrical power sources inoperable, demonstrate the offsit OPERABILITY of the remaining *A.C. sources by performing Specifications-4.8.1.1.1 cnd '.S.1.1.20.') within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per Insert

,,A,,

8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter# restore at least two offsite circuits and twe

.icsel gencrctors to"DPERABLE 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 withi e following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

b.

Insert "B_"

c itfrone offsite circuit and one diesel generator of ',he above reouired A.C. electrical power sources inoperable, demonstrate the of site OPERABILITY of the remaininf'A.C. sourcet by performing Specification +

4.8.1.1.1 cnd '.S.1.1.20.') within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per Insert,,C, 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf tef*'; restore at least one of the inoperable sources to OPERABLE 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 nsed uDo 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Restore *ct !cc;t tuc effsite circuit: and tuc dic cl gencrate:: tc CPEPf,SLE ;tatu; within 72 hcur; frc the ti;c cf initic! ic;; or bc in at ica;t HOT STfMCSY within the next 5 hcur and ' COLD SHUTD0"" within the fellcuing 30 bcurs.

With one diesel generator inoperable in addition to ACTION 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 woir rRFFK - IINTT 1 3/4 8-1 8611180249 861114 PDR ADOCK 05000482 P

PDR

ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION ACTION (Continued) 2.

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

s 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 SHUT 00WN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

With two of the above required offsite A.C. circuits inoperable, demonstrate the OPERABILITY of two e

generators by performing Specification 4.8.1.1.2a.4) within v:nd at 100 t once ;:cr 8 heur: thereafter, unless the diesel generators are already operating; i.'

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 STANOBY within the next Insert

,,E,,

6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .* "ith erly one Offsite :cerce restered, re:ter: at 1 ::t tt0 Off it0 OfrC0ft; i OPEP^3'.E St0t0 With#^ 72 h00r: fr0- ti:0 Of 4-itic! 10:: er be i-4.J::::t MOT ST,^NDeY withir the n nt S heur:

and ir COLD SHUTOOWN withi-the fe!! wing 30 heur:.

h.

With two of the above required diesel generators inoperable, demonstrate the OPERABILITY of two offsite A.C. circuits by perform-ing Specification 4.8.1.1.1 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; 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 STANOBY 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 nse d,,F, following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .+ Re:ter at les;t two dit;:1 ;; ncreter; t OPER.^.BLE :tatu: within 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ; frc time of initic! 10::=cr be in

-4 east HOT ST^NOBY within the next S hour; had in COLO SHUT 00h'N "ithi-th0 f0!!0=ing 30 h;;r;.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class IE 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:

i 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, I

i l

WOLF CREEK - UNIT 1 3/4 8-2

/

i

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 3)

Verifying the fuel transfer pump starts and transfers fuel from the storage system to the day tank, 4)

Verifying the diesel starts frc ::bient condition and a eierates to at least 514 rpm in less than or equal to 12 seconds ** The generator voltage and frequency s all be 4160 + 160 - 420 volts and 60 + 1.2 Hz within 12 second

fter the' start signal.

The diesel generator shall be started for this test by using one of the following signals:

a)

Manual, or b)

Simulated loss-of-offsite power by itself, or c)

Safety Injection test signal.

raduall 0372 5)

Verifying the generator is synchronized, loaded to greater than or equal tc4241 kW " ler th:n er 0; 1 t: 50 :::;nd:,"* operates with a load greater than or equal to-6004-kW for at least and 60 minutes, and g

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 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking for and removing accumulated water from the day tanks; c.

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

By sampling new fuel oil in accordance with ASTM 04057 prior to addition to storage tanks and:

(1) By verifying in accordance with the tests specified in ASTM 0975-81 prior to addition to the storage tanks that the sample has:

(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 an 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 degrees;

- 4 e+e d_iesel generator starts from ambient conditions shall be performed only oHte per 184 days in these surveillance tests and all other engine starts for the purpose of this surveillarce testing 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 8-3

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

(b) A kinematic viscosity at 40 C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes, if gravity was not determined by comparison with the sup-plier's certification; (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 04176-82.

(2) By verifying within 30 days of obtaining the sample that the other properties specified in Table 1 of ASTM 0975-81 are met when tested in accordance with ASTM 0975-81 except that the analysis for sulfur may be performed in accordance with ASTM D1552-79 or ASTM D2622-82.

At least once every 31 days by obtaining a sample of fuel oil in e.

accordance with ASTM D2276-78, and verifying that total particulate contamination is less than 10 mg/ liter when checked in accordance wit ASTM 02276-78, Method A.

f

_ Insert '!G" At least~once per 18 months, during shutdown, by:

1)

Subjecting the diesel to an inspection in accordance with procedures preoared in conjunction 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 1352 kW (ESW pump) while maintaining voltage at 4160 + 160 - 420 volts and frequency at 6015.4 Hz, 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, and; a)

Verifying deenergization of the emergency busses and load shedding from the emergency busses, and b)

Verifying the diesel start n the auto-start signal, energizes the emergency busses with permanently connected loads within 12 seconds, energizes the auto-cor"1ected shutdown loads through the shutdown sequencer.' i 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 + 160 - 420 volts and 60 1 1.2 Hz during this test.

WOLF CREEK - UNIT 1 3/4 8-4

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 5)

Verifying that on a Safety Injection test j gnal without loss-of-offsite power, the diesel generator startP15n the auto-start sig-nal and operates on standby for greater than or equal to 5 minutes; and the offsite power source energizes the auto-connected emerg-ency (accident) load through the LOCA sequencer.

The generator voltage and frequency shall be 4160 + 160 - 420 volts and 60 +

1.2 Hz within 12 seconds after the auto-start signal; the genera-tor steady-state generator voltage and frequency shall be main-tained within these limits during this test; 6)

Simulating a loss-of-offsite power in conjunction with a Safety Injection test signal, and a)

Verifying deenergization of the emergency busses and load shedding from the emergency busses; b)

Verifying the diesel startkn 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 energiza-tion, the steady-state voltage and frequency of the emerg-(

ency busses shall be maintained at 4160 + 160 - 420 volts and 60 + 1.2 Hz during this test; and c)

Verifying that all automatic diesel generator trips, except high jacket coolant temperature, engine overspeed, low lube oil pressure, high crankcase pressure, start failure relay, 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 greater than or equal to 6821 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 greater than or equal to 6201 kW.

The generator voltage and frequency shall be 4160 + 160 - 420 volts and SO +

1.2 Hz, - 3 Hz within 12 seconds af ter the start signal; the steady-state generator voltage and frequency shall be maintained within 4160 1 160 - 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.

6)b

- - If Speci fication 4.8.1.1.

.6)b) is not satisfactorily completed, it is not necessary to repeat tae preceding 24-hour test.

Instead, the diesel generator i

may be operated at o201 kW for 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months or until operating temperature has stabilized.

WOLF CREEK - UNIT 1 3/4 8-5

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 8)

Verifying that the auto-connected loads to each diesel generator do not exceed 6201 kW; 9)

Verifying the diesel generator's capability to:

s 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 c)

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 power; 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 i

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 *hoth 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 h

At least once per 10 years by:

1)

Oraining 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 informa-tion recommended in Regulatory Position C.3.b of Regulatory Guide 1.108, Revi-sion 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 report shall be supplemented to include the additional information recommended in Regulatory Position C.

b of Regulatory Guide 1.108, Revision 1 August 1977.

Insert "I"

WOLF CREEK - UNIT 1 3/4 8-6

TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDU'LE '

NUMBER OF FAILURES IN NUMBER OF FAILURES I LAST 20 VALID TESTS @ LAST 100 VALID TEST TEST FREQUENCY g;

4 At least once per days-y 2@@

2:E 5 At least once per -1+ days At least on per 7 days p

At least ene per 3 days hriteriafordeterminingnumberoffailuresandnumberofvalidtestsshall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.108, Revision 1, August 1977, wher the 10:t 100 test; cr dete mined :

per

'uclear unit b::ic.

For the perpece ef thic tett schedule, cr!y n!id tc0t; cenducted efter th: : ;pletion f the precper-tional tc;t require;;nt;

-Of Rc;;ulatory Cuide 1.108, Revicien 1, Au;;u-t '07

hal' b ' cl"";" i-the

~

- utet 2cn o f t h " ' a

;' ' ^0 " ' i ' T: ^.. " but dete mi ed on a er diese generator asis, or the purposes of determining the required test frequency, the previous test failure count may be reduced to zero if a complete diesel overhaul to like-new conditions is completed, provided that the overhaul including appropriate post-maintenance operation and testing, is performed in accordance with vendor's technical manuals, 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), four tests, in accordance with Specification 4.8.1.1.2a.5).

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

WOLF CREEK - UNIT 1 3/4 8-7

3/4.8 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 OPERA 8ILITY of the A.C. and 0.C power sources and associated distri-

.bution 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 operation 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.

When one diesel generator is inoperable, there is an additional ACTION requirement to verify that all required systems, sub-systems, 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 loss 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 administratively check by examining logs or other information to determine if certain components are out of service for main-tenance or other reasons.

It does not mean to perform the Surveillance Requirements needed to 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.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies," Harch 10, 1971, 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 197(, and 1.137, " Fuel-Oil Systems for Standby Diesel Generators,"

Revision 1, October 1979.

as modified by Amendment No.

issued on Wolf Creek unit 1 8 3/4 8-1

1 ATTACH!!ENT IV i

Proposed Technical Specification Changes (typed) 1 1

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8 t

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T'"F Y

3/4.8 ELECTRICAL POWER SYSTEMS 1

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 Puel Oil Storage System containing a minimum volume of 85,300 gallons of fuel, and 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 offsite A.C.

source by performing Specification l 4.8.1.1.1 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 both diesel generators of the above required A.C.

electrical power sources have not been successfully tested within the past 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months se demonstrate OPERABILITY by performing Specification 4.8.1.1.2a.4) separately for each diesel generator within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Restore at least two offsite circuits to OPERABLE statta 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 .

b.

With one diesel generator of the above required A.C.

electrical power sources inoperable, demonstrate the OPERABILITY of the offsite A.C.

sources by performing Specification 4 8.1.1.1 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.

Demonstrate the OPERABILITY of the remaining OPERABLE diesel generator by performing Specification 4.8.1.1.2a.4) within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ; restore e

the inoperable diesel generator 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 SHWPDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

If the diesel generator became inoperable due to any cause other than preplanned preventative maintenance or testing, this test is required to be completed regardless of when the inoperable diesel generator is restored to OPERABLE.

e VOLP CREEK - UNIT 1 3/4 8-1

= _ - _ -

ELECTRICAL POWER SYSTEMS LIMITINC CONDITION FOR OPERATION s

ACTION (Continued) c.

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 Specification 4.8.1.1.1 within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter and Specification 4.8.1.1.2a.4) within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months on the redundant diesel generator; restore at least one of the inoperable sources to OPERABLE 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 with 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 remaining A.C.

electrical power source (offsite circuit 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 diesol generator OPERABILITY performed in accordance with Specification 4.0.1.1.2a.4) under this ACTION for au OPERABLE diesel generator or a diesel generator that was reatored to CPERABLE, satisfies the subsequent testing requirement of Specification 3 8.1.1 ACTION a.

or ACTION b. for an OPERABLE diesel generator.

d.

With one diesel generator inoperable in addition to ACTION b or o l 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 .

e.

With two of the above required offsite A.C.

circuits inoperable, l demonstrate the OPERABILITY of two diesel generators by performing Specification 4.8.1.1.2a.4) within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months unless the diesel l generators are already operating; restore at least one of the inoperable offsite sources to 0FERABLE 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 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 offaite 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.

WOLP CREEK - UNIT 1 34 8-2

- ~ ~,.

ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION ACTION (Continued) f.

With two of the above required diesel generators inoperable, l demonstrate the OPERABILITY of two offsite A.C.

circuits by performing Specification 4.8.1.1.1 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; 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 .

Pollowing 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.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class 18 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 leaat 514 rpm in less than or equal to 12 seconds.n* The generator l voltage and frequency shall be 4160 + 160 - 420 volts and 60

+

1.2 Hz within 12 seconds ** after the start signal.

The l diesel generator shall be started for this test by using one of the following signals:

a) Manual, or

- Diesel generator starts from ambient conditions shall be performed only l once per 184 days in those surveillance tests and all other engine starts for the purpose of this surveillance testing shall be preceeded by an engine prelube period and/or other warmup procedures recommended by the i

manufacturer so that the mechanical stress and wear on the diesel engine is minimized.

1 WOLF CREEK - UNIT 1 3/4 8-3 l

i

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) b) Simulated loss-of-offsite power by itself, or c) Safety Injection test signal.

5)

Verifying the generator is synchronized, gradually loaded to greater than or equal to 3721 kWe* and operates with a load greater than or equal to 3721 kW for at least 60 minutes, and 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 diecel where the period of operation was greater than or equal to 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking for and removing accumulated water from the day tanks; At least once per 31 days by checking for and removing accumulated c.

water from the fuel oil storage tanks; d.

By sampling new fuel oil in accordance with ASTM D4057 prior to addition to storage tanks and:

1)

By verifying in accordance with the tests specified in ASTM D975-81 prior to addition to the storage tanks that the sample hast a)

An API Gravity of within 03 degrees at O or a g

specific gravity of within 0.0016 at 60/60 P, when compared to the suppligr's certificate or an absolute specific gravity at 60/60 P of greater than or equal to 0.83 but leas 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 degrees; 0

b)

A kinematic viscosity at 40 0 of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes, if gravity was not determined by comparison with the supplier's certification; c)

A flash point equal to or greater tnan 125 P; and se Diesel generator starts from ambient conditions shall be performed only once per 184 days in these surveillance tests and all other engine starts for the purpose of this surveillance testin.g shall be preceeded 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.

WOLP CREEK - UNIT 1 3/4 8-4

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 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 ASTM D975-81 except that the analysis for sulfur may be performed in accordance with ASTM D1552-79 or ASTM D2622-82.

e.

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

f.

At least once per 184 days the diesel generators shall be startedet and accelerated to at least 514 rpm in less than or equal to 12 seconds. The generator voltage and frequency shall be 4160 + 160 - 420 volts and 60 + 1.2 Hz within 12 seconds after the start signal.

Subsequently verify the generator is loaded to greater than or equal to 6201 kW in less than or egeal to 60 seconds and operates with a load greater than or equal to 6201 kW for at least 60 minutes.

g.

At least once per 18 months, by:

l 1)

Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction 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 1352 kW (ESW pump) while maintaining voltage at 4160 + 160 - 420 volts and frequency at 60 + 5.4 Hz, 3)

Verifying the diesel generator capability to reject a load of 6201 kW without tripping.

The generator voltage shall not exceed 4784 volta during and following the load rejection,

- Diesel generator starts from ambient conditions shs11 be performed only once per 184 days in these surveillance tests and all other engine starts for the purpose of this surveillance testing shall be preceeded by an engine prelube period and/or other warmup procedures recommended by the manufacturer 80 that the mechanical stress and wear on the diesel engine is minimized.

WOLP CREEK - UNIT 1 3/48-5

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 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, l

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 la loaded with the shutdown loads.

After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 + 160 - 420 volts and 60 j; 1.2 Hz during this test.

5)

Verifying that on a Safety Injection test signal without loss-of-offsite power, the diesel generator starts ** on the l 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 j; 1.2 Hz within 12 seconds after the auto-start signal; the generator steady-s tate generator voltage and frequency shall be maintained within these limits during this test; 6)

Simulating a loss-of-offsite power in conjunction with a Safety Injection 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, l

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. Af ter energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 + 160 - 420 volts and 60 + 1.2 Hz during this test; snd

- Diesel generator starts from ambient conditions shall be performed only once per 184 days in these surveillance tests and all other engine starts for the purpose of this surveillance testing shall be preceeded 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.

WOLP CREEK - UNIT 1 3/4 8-6

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) c)

Verifying that all automatic diesel generator trips, except high jacket coolant temperature, engine overspeed, low lube oil pressure, high crankcase

pressure, start failure

relay, and generator differential, are automatically bypassed upon loss of voltage on the emergency buss 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 greater than or equal to 6821 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 greater than or equal to 6201 kW.

The generator voltage and frequency shall be 4160 + 160 - 420 volta and 60 + 1.2 Hz,

- 3 Hz within 12 seconds after the start signal; the steady-state generator voltage and frequency shall be malatained within 4160 + 160 - 420 volts and 60 + 1.2 Hz during this l test.

Within 5 minutes after completing this 24-hour test, perform Specification 4.8.1.1.2g.6)b) ***;

l 8)

Verifying that the auto-connected loads to each diesel generator do not exceed 6201 kW; 9)

Verifying the diesel generator's capability to:

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 c)

Be restored to its standby status.

- Diesel generator starts from ambient conditions shall be performed only once per 184 days in these surveillance tests and all other engine starts for the purpose of this surveillance testing shall be preceeded by an engine prelube period and/or other waissup procedures recommended by the manufacturer so that the mechanical stress and wear on the diesel engins is minimized.

ens If Specification 4.8.1.1.2g.6)b) is not satisfactorily completed, it is l l

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 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months or until operating temperature has stabilized.

WOLP CREEK - UNIT 1 3/4 8-7 l

l k

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

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 power;

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 OPERA 3LE 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 startingen 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 1.

At least once per 10 year by:

l 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 Repor.ts - 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, Ravision 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 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.

i et Diesel generator starts from ambient conditions shall be performed only once per 184 days in these surveillance tests and all other engine starts for the purpose of this surveillance testing shall be preceeded 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 l

is minimized.

l WOLP CREEK - UNIT 1 3/4 8-8 1

TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE Numbers of Pailures In Number of Pailures in Last 20 Valid Tests @

Last 100 Valid Tests @

Test Prequency l

<1

<4 At least once per 31 days 2; 299 2; 5 At least once per 7 days

@ Criteria for determining number of valid failures and number of valid l tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.108, Revision 1, August 1977, but determined on a per diesel generator basis.

Por the purposes of determining the required test frequency, the previous test failure count may be reduced to zero if a complete diesel overhaul to like-new conditions is completed, provided that the overhaul including appropriate post-maintenance operation and testing, in accordance with vendor's technical manuals, 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 testa shall be in accordance with Specification 4.8.1.1.2a.4),

four

tests, in accordance with Specification 4.8.1.1.2a.5).

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

WOLP CREEK - UNIT 1 3/4 8-9 l

3.4.8 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 distribution 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 CPR Part 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation.

The OPERABILITY of the power sources are consistent with the initial condition assumptions of the esfety analyses and are based upon maintaining at least one redundant set of onsite 4.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.

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 loss 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 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 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.

The Surveillance Requirements for demonstrating the OPERABILITY of the 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,"

Revision 1

August 1977 as modified by Amendment No.

issued on and 1.137,

" Fuel-Oil Systems for Standby Diesel Generators,"

Revision 1, October 1979.

WOLP CREEK - UNIT 1 B 3/4 3-1

._.

v t e Letter Sequence Request
TAC:63951, (Open)
Initiation Request, Request, Request, Request Acceptance... Administration Questions Answers Results Approval... Other: ML20214T961, ML20235C233
MONTHYEAR1987-04-17 [Table View]

ML20213G655

Text

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