ML20215N812

Proposed Tech Specs Re Diesel Generator Reliability,Testing & Surveillance

ML20215N812
Person / Time
Site:	McGuire, Mcguire
Issue date:	10/30/1986
From:	DUKE POWER CO.
To:
Shared Package
ML20215N810	List: ML20215N809 ML20215N812
References
TAC-59263, TAC-59264, NUDOCS 8611070302
Download: ML20215N812 (14)

Text

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3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR CPERATION 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 Essential Auxiliary Power System, and b.

Two separate and independent diesel generators, each with:

1)

A separate day tank containing a minimum volume of 120 gallons of fuel, 2)

A separate Fuel Storage System containing a minimum vol'ume of 28,000 gallons of fuel, and 3)

A separate fuel transfer pump.

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

ACTION:

~

a.

either an offsite circuit or diesel generator of the ab b;

requir electrical power sources inoperable rate the 66 OPERABILITY of ining A.C. sources orming Specifica-N6kl tions 4.8.1.1.la. and 4...

in 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 p " ')

i per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter-a o offsite circuits and

'I l

two diesel en=

o OPERABLE status wi ours or be in at Af6tT' leas BY 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 COL N

FA66 in the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

b.

• h one offsite circuit and one diesel generator of the a req

.C. electrical power sources inoperable, d rate the

.566 OPERABILI he remaining A.C. sources by p ing Specifica-Ng,)

tions 4.8.1.1.la.

4.8.1.1.2a.4) with our 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; re at one of the inoperable k b.)

sources to OPERABLE status w' hours or be in at least HOT STANDBY within the ne urs and D SHUTDOWN within the N6N following 30 hou estore at least two o e circuits and two gg diesel ge

. s to OPERABLE status within 72 ho.

rom the time of i loss or be in at least HOT STANDBY within the 6 curs 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 />.b d

I WithonedieselgeneratorinoperableinadditiontoACTION/.orpl.

/

c.

a W,

above, verify that:

1.

All required systems, subsystems, trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emargency power are also OPERABLE, and 8611070302 861030 i

.{

PDR ADOCK 05000369 p

PDR McGUIRE - UNITS 1 and 2 3/4 8-1

With an offsite circuit of the above required A.C. electrical power sources a.

inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. sou'rces by performing surveillance requirement 4.8.1.1.la 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; separately demonstrate the operability of two,, diesel generators by ' performing surveillance requirements 4.8.1.1.2a.4 and 4.8.1.1.2a.5 within 24 hours unless this surveillance was performed within the previous 24 hours, or unless the diesel is operating **, restore at least two offsite circuits and two diesel generators to OPERABLE status within 72 y hours or be in at least HOT STANDBY within the next 6 hours and in COLD SHUTDOWN within the following 30 hours. b. With one offsite circuit and one diesel generator of the above required A.C. electrical power sources inoperable *, demonstrate the OPERABILITY of the remaining offsite A.C. source by performing surveillance requirement 4.8.1.1.la within 1 hour and at least once per 8 hours thereafter; demonstrate the operability.of the remaining diesel generator by performing (hh, surveillance requirements 4.8.1.1.2a.4 and 4.8.1.1.2a.5 within 8 hours unless this surveillance was performed within the previous 24 hours, or unless the diesel is operating **; restore at least one of the inoperable sources to OPERABLE status within 12 hours or be in at least HOT STANDBY within the next 6 hours and in ' COLD SHUTDOWN within the following 30 hours; with the diesel generator restored to OPERABLE status, follow action statement a; with the offsite circuit restored to OPERABLE, follow action statement d. l l

ELECTRICAL POWER SYSTEMS ACTION: (Continued) 2. When in MODE 1, 2, or 3 with a steam pressure greater than 900 psig, the steam-driven auxiliary.feedwater pump is OPERABLE. If these conditions are not satisfied within 2 hours be in at least HOT STANDBY within the next 6 hours and in COLD SHUTDOWN within the following 30 hours. d. two of the above required offsite A.C. circuits inoperable, demons e the OPERABILITY of two diesel generators by ing Mgcg Specificatio 8.1.1.2a.4) within 1 hour and a once per 8 hours thereafte, less the diesel e ors,are already operating; restore at le one e inoperable offsite-sources to Ik {g OPERABLE status within be in at least HOT STANDBY within the next 6 hour only one of source restored, restore at M least t site circuits to OPERABLE sta ithin 72 hours from pl66)j)e[ of initial loss or be in at least HOT STAN thin the next 6 hours and in COLD SHUTDOWN within the following 30 h n e. two of the above required diesel generators inoperabl' demons the OPERABILITY of two offsite A.C. cir ' by -performing Spe *

• ation 4.8.1.1.la. within r and at least once per 8 hours thereafte,

store at lea ne of,the inoperable diesel { ))' generators to OPERABLE statu 2 hours or be in at least HOT STANDBY within the next 6 s an LD SHUTDOWN within the-following 30 hours store at least two enerators to OPERABLE sta ithin 72 hours from time of initia s or be in least ANDBY within the next 6 hours and in COLD SHU w in the following 30 hours. 4% CMb Tao Fo0TdoT&S6E Qw A%Q SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Essential Auxiliary Power System shall be: a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignments; indicated power availability, and b. Demonstrated OPERABLE at least once per 18 months during shutdown by transferring (manually and automatically) unit power supply from the normal circuit to the alternate circuit. 4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE: l a. In accordance with the frequency specified in Table 4.8-1 on a l STAGGERED TEST BASIS, by: 1) Verifying the fuel level in the day tank, McGUIRE - UNITS 1 and 2 3/4 8-2 r

1 d. With a diesel generator of the above required A.C. electrical power sources inoperable *, demonstrate the OPERABILITY of the A.C. offsite sources by performing Surveillt 'e Requirement 4.8.1.1.la within I hour and at least once per 8 hours tF ceafter; and unless the inoperability of the diesel was due to preplanned _ssting or' maintenance, demonstrate the operability of the remaining diesel generator by performing Surveillance Requirements 4.8.1.1.2a.4 and 4.8.1.1.2a.5 within 24 hours or unless the diesel is operating **, restore diesel generators to OPERABLE status within 72 hours or be in at least HOT STANDBY within the next 6 hours and in COLD SHUTDOWN within the following 30 hours. With two of the above required offsite A.C. circuits inoperable, separately e. demonstrate.the OPERABILITY of two diesel generators by performing surveil-lancerequirements 4.8.1.1.2a.4and 4.8.1.1.2a.5within 8 hours, unless the diesel generators are already operating; restore at least one of the inoper-able offsite sources to OPERABLE status within 24 hours or be in at least HOT STANDBY within the next 6 hours and in cold shutdown within the following 30 hours. With only one offsite source restored, follow action statement a. f. With two of the above required diesel generators inoperable *, demonstrate the OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.la within I hour and at least once per 8 hours [g* thereafter; restore at least one of the inoperable diesel generators to OPERABLE status within 2 hours or be in at least HOT STANDBY within the next 6 hours and' in COLD SHUTDOWN within the following 30 hours. With one diesel generator restored, follow action statement d. f

• A diesel generator shall be considered to be inoperable from the time of 7

failure until it satisfies the requirements of Surveillance Requirements 4.8.1.1.2a.4 and 4.8.1.1.2a.5, ff

• • generator is restored to OPERABILITY.This test is required to be completed not applicable.

The provisions of Specification 3.0.2 are

ELECTRICAL POWER SYSTEMS SURVEILLANCE' REQUIREMENTS (Continued) 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 from ambient condition and accelerates to at least 488 rps in less than or equal to 11 secondW The generator voltage and frequency shall be 9 at least 4160 volts and 57 Hz within 11 seconds after 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) Simulated loss-of-offsite power in conjunction with an ESF Actuation test signal, or d) An ESF Actuation test signal by itself. 5) Verifying the generator is synchronized, loaded to greater than or equal to 3000 kW in less than or equal to 60 seconds, and to 4000 kW within 10 minutes and operates for at least 60 minutes, and 6) Verifying the diesel generator is aligned to provide standby power to the associated emergency busses. b. By removing accumulated water: 1) From the day tank at least once per 31 days and after each occasion when the diesel is operated for greater than 1 hour, and 2) From the storage tank at least once per 31 days. c. By sampling new fuel oil in accordance with ASTM 04057-81 prior to addition to the 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 A DD Farrt4 ff has: N 'y a) An API Gravity of within 0.3 degrees at 60*F or a specific 7 gravity of within 0.0016 at 60/60*F, when compared to the SH/f7 7c y 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 at 60*F of greater than or equal to 27 degrees but less than or equal to 39 degrees. l l McGUIRE - UNITS 1 and 2 3/4 8-3 Amendment No. (Unit 2) Amendment No. (Unit 1)

t (11 sec) from ambient conditions shall be per-All other

• The diesel generator s arformed at least once per 184 days i t

engine starts for the purpose of this surveillance recommended.by the d an engine prelube period and/or other warmup proce uresdiesel en h manufacturer so that mechanical stress and wear on t minimized. i 1 I

i ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) b)

1. ----tic vicosity at 40*C of greater than or amart-To

/SI 1.9 centistokes ^tc- - - =7~To 4.1 centistokes, M if gravity was n M, ous i... by comparison M Y f7.,) _r,riier s certification. M,6 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 31 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. d. At least once every 31 days by obtaining a sample of fuel oil from the storage tanks 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. e. At least once per 18 months, during shutdown, by: 1) Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction wirh its manufacturer's recommendations for this class of standby service; ~ 2) Verifying the generator capability to reject a load of greater than or equal to 576 kW while maintaining voltage at 4160 t 420 volts and frequency at 60 1 1.2 Hz; 3) Verifying the generator capability to reject a load of 4000 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 l l b) Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected i loads within 11 seconds, energizes the auto-connected blackout loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is t loaded with the blackout loads. After energization, the l steady-state voltage and frequency of the emergency busses l shall be maintained at 4160 t 420 volts and 60 1 1.2 Hz l during this test. l McGUIRE - UNITS 1 and 2 3/4 8-4 Amendment No. (Unit 2) Amendment No. (Unit 1) M I l

i 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, (alternatively, Saybolt viscosity, SUS at 100*F of greater than or equal to 32.6, but less than or equal to 40.1), if gravity was not determined by comparison with the supplier's certification.

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 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 at least 4160 volts and 57 Hz within 11 seconds after the auto-start signal; the steady state generator voltage and frequency shall be maintained within 4160 1 420 volts and 60 1 1.2 Hz during this test; 6) Veritying u n

*' lated loss of t edr oW, f

v.. /O with offsite power not avai ~, e2 6-- 1"from the a emergency. busses a s se the diesel gegat ne 4 cco h design requiremen (p /l) 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, energizes the emergency busses with permanently connected loads within 11 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 mai_ntained at 4160 + MfLAC6(Al! 420 volts and 60 + 1.2 Hz during this test; and - [f g [J c) ing that all automatic diesel generat except eed, lube oil e, and generator Qgg differential, an nerator breaker trips, l except r time overcurren, automatically l ed upon loss of voltage on the eme bus con-current with a Safety Injection Actuation sig (Jct >> W 4- + J 8 N6M bn ) Verifying the diesel generator operates for at least 24 hours. During the first 2 hours of this test, the diesel generator shall be loaded to greater tiian or equal to 4400 kW and during the remaining 22 hours of this test, the diesel generator shall be loaded to greater than or equal to 4000 kW. The generator voltage and frequency shall be at least 4160 volts and 57 Hz within 11 seconds after the start signal. The steady-state generator voltage and frequency shall be maintained within 4160 420 volts and 60 1.2 Hz during this test. 2"tS j i "._t:: :" ^ - e n er '.... g C '^ ~ t x t, ;;cfw. Ori'b l wa a ^ 9 i 9J \\LT. wwwiv.4 f.V. s . --..j-fy McGUIRE - UNITS 1 and 2 3/4 8-5 Amendment No. (Unit 2) Amendment No. (Unit 1)

c) Verifying that all automatic diesel generator trips, except engine overspeed, lube oil pressure, and generator differential are automatically bypassed upon loss of voltage on the emergency bus concurrent with a safety Injection Actuatic.i signal. Additionally, all diesel generator breaker trips, except generator time overcurrent, are verified to be automatically bypassed upon concurrent loss of voltage on the emergency bus and a Safety In.iection Actuation signal. 7. Operating for one hour at 4000kw to achieve temperature stability. 7, Within 5 minutes, restart and perform specification 4.8.1.1.2e)6b. j i l i

blo CHAD % To ~ THis Mss ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 9) Verifying that the auto-connected loads to each diesel generator do not exceed the 2-hour rating of 4400 kW;

10) 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.

11) 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;

12) 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;

13) Verifying that the automatic load sequence timer is OPERABLE with the interval between each load block are within the tolerances shown in Table 4.8-2;

14) Verifying that the following diesel generator lockout features prevent diesel generator starting only when required:

a) Turning gear engaged, and b) Emergency stop.

15) Verifying that with all diesel generator air start receivers pressurized to less than or equal to 220 psig and the compres-sors secured, the diesel generator starts at least 2 times from ambient conditions and accelerates to at least 488 rpm in less than or equal to 11 seconds.

f. 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 488 rpm in less than or equal to 11 seconds; and g. At least once per 10 years by: McGUIRE - UNITS 1 and 2 3/4 8-6 Amendment No. g (Unit 2) Amendment No. 23 (Unit 1)

e ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 1) Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypochlorite solution, 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 non-valid, shall be reported 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. f3 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. 4.8.1.1.4 Diesel Generator Batteries - Each diesel generator 125-volt battery bank and charger shall be demonstrated OPERABLE: a. At least once per 7 days by verifying that: 1) The electrolyte level of each battery is above the plates, and 2) The overall battery voltage is greater than or equal to 125 volts under a float chargs. b. At least once per 18 months.by verifying ~ that: 1) The-batteries, cell plates and battery racks show no visual indication of physical damage or abnormal deterioration; i 2) The battery-to-battery and terminal connections are clear, tight, free of corrosion and coated with anti-corrosion material; and 3) The battery capacity is adequate to supply and maintain in OPERABLE status its emergency loads when subjected to a battery l service test. l AmendmentNo.N((Unit l McGUIRE - UNITS 1 and 2 3/4 8-7 Amendment No. 4 Unit 2) l

TABLE 4.8-l DIESEL GENERATOR TEST SCHEDULE Number of Failures Number of Failures in in Last 100 Valid Last 20 Valid Tests

• Tests
• Test Frequency

<1 <4 Once per 31 days >2** >5 Once per 7 days l

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

For the purposes of determining the required test fFaquency, the previous I l test failure count may be reduced to zero if a comp'iete diesel overhaul l to like-new conditions is completed, provided that the overhaul including i appropriate post-maintenance operation and testing, is specifically approved by the manufacturer and if acceptable reliability has been demonstrated. The i reliability criterion shall be the successful completion of 14 consecutive tests in a single series. Ten of these tests shall be in accordance with Surveillance Requirement 4.8.1.1.2.a.4; four tests, in accordance with Surveillance Requirement 4.8.1.1.2.c. If this criterion is not satisfied during the first series of tests, any alternate criterion to be used to i transvalue the failure count to zero requires NRC approval.

• • 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.

MM/((E -d llT3 / /ht)4 2-A NORing - UNIT 2-3/4 8-5 g Amendment No. I

(SAG 36) CHANGES TO APRIL 15 SUBMITTAL 1. This paragraph was not lettered in the April 15 submittal. This becomes paragraph. c, and the three subsequent paragraphs become d, e, and f. In addition, the referenced paragraphs become b and d. 2. Changes made to paragraph a. The work " separately" is added to clarify that diesels are not tested a. simultaneously. b. Requirement added (4.8.1.1.2a.5) to load diesel as part of operability-test. Reference added to footnote (** - see Item 8, below) c. 3. Changes made to paragraph b. a. See Item 2.b. b.- "Unless. diesel is operating" added. c. See Item 2.c. d. Appropriate Action (d) referenced. '4. Changes to paragraph d (formerly c) Reference added to footnote (see Item 7). a. b. See Item 2.b. c. See Item 2.c. 5. Changes to paragraph e (formerly d) a. See Item 2.a. b. See Item 2.b. 6. Change to paragraph f (formerly e) a. Saa Item 4a b. ' Appropriate Action (d) referenced. 7. Footnote added to clarify operability. 8. Footnote added to clarify test requirements. 9. Asterisk not flagged as change in April 15, 1986 submittal. 10. Not flagged as change. 11. Grammar improved; no change in requirements. Not flagged as change. 12. Requirements added (one hour at 4000 KW) to assure temperature stabilization.

13. Returned to present specification.

14. Table replaced with table from North Anna Specification.}}