ML20246B132

From kanterella
Revision as of 03:02, 9 March 2021 by StriderTol (talk | contribs) (StriderTol Bot change)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Proposed Tech Specs Re Steam Generator Testing Requirements
ML20246B132
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 07/03/1989
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20246B128 List:
References
NUDOCS 8907070208
Download: ML20246B132 (20)
v • d • e


Text

{{#Wiki_filter:, _ - _ _ - _ _ _ 

                                    ~

ATIACJIMEND PROPOSED CHAILGES TO THE IECIMIfAL_ SPECIFICATIONS FOR DEIEATRiQ LICEUSES NPF-11 AND NPF-18 l REVISED _fAGES: NPF-11 NPF-18 3/4.8-3 3/4 8-3 3/4 8-4 3/4 8-4 3/4 8-5 3/4 8-5 3/4 8-6 3/4 8-6 3/4 8-7* 3/4 8-7* B 3/4 8-1* B 1/4 8-1* Insert Page Insert Page

  • An unrelated amendment request, affecting these pages, was transmitted to the NRC in a W.E. Morgan letter dated March 16, 1989. This submittal is currently under review by NRR.

01917 8907070208 890703 PDR ADOCK 05000373 p PDC 

                                                       ~

e , F' 

                                                 . 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:
a. Determined OPERABLE.at least once per 7 days by verifying correct breakerLalignments and indicated power availability, and
b. Demonstrated OPERABLE at least once per 18 months during shutdown by

' manually transferring unit power supply from the normal circuit to the alternate circuit. 4.8.1.1.2 Each of the above required diesel generators shall be demonstrated OPERABLE:

a. In accordance with the frequency specified in Table 4.8.1.1.2-1 on a STAGGERED TEST BASIS by: "
1. Verifying the fuel level in the day fuel 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 fuel tank.
4. Verifying the diesel starts from ambient condition and Y ac rates to 900 rpm + 5%, -2% in less than or equal to 13 seconds
  • The i generator voltage and frequency sha e 4160 1 150 volts ana 60 + 3.0, -1.2 Hz within 13 second after the start signal.

5. 4g g jg * - - Verifying the diesel generator is synchroni loaded to ; ::t:r f 

                                                                                    ; 11 to 2600 kwtwithin 60 seconds              and operates with               l this load for at least 60] minutes.
6. Verifying the diesel generator is aligned to provide standby power to the associated emergency busses.
7. Verifying the pressure in all diesel generator air start receivers to be greater than or equal to 200 psig.
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 hour by i

checking for and removing accumulated water from the day fuel tanks.

c. At least once per 92 days and from new fuel oil prior to addition to the storage tanks.by verifying that a sample obtained in accordance 3 I

with ASTM-D270-1975 has a water and sediment content of less than or f equal to 0.05 volume percent and a kinematic viscosity @ 40*C of greater than or equal to 1.9 but less than or equal to 4.1 when tested in accordance with ASTM-0975-77, and an impurity level of less than 2 mg. of insolubles per 100 ml. when tested in accordance with ASTM-D2274-70. These diesel generator starts from ambient conditions shall be performed at p least once per 184 days in these' surveillance tests. All other engine starts Lasati 8 ' for the purpose of this surveillance testing shall be preceded by an engine , prelube period and/or other warmup procedures recommended by the manufacturer f so that mechanical stress and wear on the diesel engine is minimized. l Lesent C - LA SALLE - UNIT 1 3/4 8-3 j Amendcent No.16 _ _ _ _______ _ _ __ _ _ _____ _ _________. . - - - _ __ __ . - . J

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. At least once per 18 months during shutdown by:
1. Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of stand rvice.
2. Verifying the diesel generator capabili reject a load of greater than or equal to 1190 kW. for diese generator 0, greater.

than or equal to 638 kW for diesel generators 1A and 2A, and greater than or equal to 2381 kW for diesel generator 18 while maintaining engine speed less than or equal to 75% of the difference between nominal speed and the overspeed trip setpoint-or 15% above nominal, whichever is less

3. Verifying the diesel generator. capabili rejectaloadof 2600 kW without tripping. The generator voltage shall not exceed 5000 volts during and folio ing the load rejection.
4. Simulating a loss of offsite powe itself, and:

a) For Divisions 1 and 2 and for Unit 2 Division 2:

1) Verifying de energization of the emergency busses and load shedding from the emergency busses.
2) ' Verifying the diesel generator starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 13 seconds, energizes the auto-connected loads and operates for greater than or equal to 5 minutes while its generator is so loaded. After energization, the steady state voltage and frequency of the emergency busses shall be maintained at 4160 1 150 volts and 60 1 1.2 Hz during this test.

b) For Division 3: )

1) Verifying de-energization of the emergency bus. -{
2) Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads with- ,

in 13 seconds and operates for greater than or equal to 5 minutes while its generator is so loaded. After energization, the steady state voltage and frequency of the emergency bus shall be maintained at 4160 t i 150 volts and 60 i 1.2 Hz during this test.

5. Verifying that on an ECCS actuation test signal, with loss of offsite power, diesel generators 0, 1A and IB star the auto-start signal and operate on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 4160 + 416, -150 volts and 60 + 3.0, -1.2 Hz within 13 seconds after the auto-start signal; the steady state generator voltage and frequency shall be maintained within these limits during ,

i this test. INSERT d y LASALLE-UNIT 1 3/4 8-4 Amendment No. 63 

                       '.ELECTR_ICAL POWER SYSTEMS
                         . SURVEILLANCE REQUIREMENTS (Continued)
6. Simulating a loss of gffsite power in conjunction with an ECCS l actuation test signa 1N, and: ,

a) For Divisions 1 and 2:

1) Verifying de-energization of the emergency busses and load shedding from the emergency busses.
2) Verifying the diesel generator starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 13 seconds, energizes the auto-connected emergency loads.through the load sequencer ~and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After energization, the steady state voltage and frequency of the emergency busses shall be maintained at 4160 1 416-volts and 60 1 1.2 Hz during this test.

b) For Division 3:

1) Verifying de-energization of the emergency bus.
                                                       '2) Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads within 13 seconds and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After energization, the steady             J state voltage and frequency of the emergency bus shall be maintained at 4160 1 416 volts and 60 i 1.2 Hz during this test.
7. Verifying that all diesel generator 0, IA and 18 automatic trips l except the following are automatically bypassed on an ECCS actuation signal:

a) For Divisions 1 and 2 - engine overspeed, generator differential current, and emergency manual stop. b) For Division 3 - engine overspeed, generator differential or overcurrent, and emergency manual stop.

8. Verifying the diesel generator operates for at least 24 hours. l During the first 2 hours of this test, the diesel generator shall be loaded to greater than or equal to 2860 kw and during the remaining 22 hours of this test, the diesel generator shall be loaded to 2600 kw. The generator voltage and frequency shall be 4160 + 420, -150 volts and 60 + 3.0, -1.2 Hz within 13 seconds after the start signal; the steady state generator voltage and frequency shall be maintained within these limits during this  ;

test. Within 5 minutes after completing this 24 hour test, i L perform Surveillance Requirement 4.8.1.1.2.d.4.a).2) and b).2)

  • Wr )

l l h sEnr A -> Amendment No.18 i LA SALLE - UNIT 1 3/4 8-5 i

(- i 

        " ELECTRICAL P'0WER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)
                                                                                               ~
9. Verifyin[thattheauto-connectedloadstoeachdieselgenerator l do not exceed the 2000 hour rating of 2860 kW.
10. Verifying the diesel generator's capabilityIto: I 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. Verifyingthatwithdieselgenerator0,IAandIBoperatinfina  ;

test mode and connected to its bus: a) For Divisions 1 and 2, that a simulated ECCS actuation signal overrides the test mode by returning the diesel generator to standby operation. b) For Division 3, that a simulated trip of the diesel generator overcurrent relay trips the SAT feed breaker to bus 143 and that the diesel generator continues to supply normal bus loads.

12. Verifying that the automatic load sequence timer is OPERABLE I with the interval between each load block within i 10% of its design interval for diesel generators 0 and 1A. ,
13. Verifying that the following diesel generator lockout features l prevent diesel generator operation only when required:

a) Generator underfrequency. b) Low lobe oil pressure. c) High jacket cooling temperature d) Generator reversp power. e) Generator overcurrent. f) Gererator loss of field. g) Engine cranking lockout. , I 4 Y 1f Surveillance Requirement 4.8.1.1.2.d.4a)2) and/or b)2) are not satisfactorily completed, it is not necessary to repeat the preceding 24 hour test. Instead, the diesel generator may be operated at 2600 kW for 1 hour or until operating l temperature has stabilized. . _T_NSEeT A --y LA SALLE - UNIT 1 3/4 8-6 Amendment No. 18 i 

               ^

4 7W15 ' 74GE. IS ETAEc. Tap py 

                                                                                                                          . AN O TH E R.                     AMENDMENT 200 MEST -

St4BM ITT ED oN 3/16 /89 

          .-                               ELECTRICAL POWER SYSTEMS l
          , . -- SURVEILLANCE REQUIREMENTS (Continued)
e. At least once per 10 years or after any modifications whi h could ence by starting diesel gener-affect diesel ators 0,1A andgenerator IB simultaneously, interdepegduring shutdown, and verifying that all three diesel generators accelerate to 900 rpm + 5, -2% in less than or equal to 13 seconds.
f. At least once per 10 years by:
                                                                     -1. Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypochlorite or equivalent solution, and
                                                                     '2. Performing a pressure test of those portions of the diesel fuel oil system designed to Section III, subsection NO, of the ASME Code in accordance with ASME Code Section 11, Article IWD-5000.
4. 8.1.1. 3 Reports - All diesel generator failures, valid or non-valid, shall be reported to the Commission pursuant to Specification 6.6.C within 30 days. l 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 report shall be supplemented to
                                                            ~

include the additional informatiori recommended in Regulatory Position c.3.b of pr Regulatory Guide 1.108, Revision 1, August 1977. A 

                                           ?

TABLE 4.8.1.1.2-1 ~~ NEW PAGE. DIESEL GENERATOR TEST SCHEDULE Humber of Failures in Last 100 Valid Tests

  • Test Frecuency
                                                                      <1 At least once per 31 days 2                                             At least once per 14 days 3                                             At least once per 7 days
                                                                      >4                                               At least once per 3 days
                                                              " Criteria for determining number of failures and nurtber of valid tests shall be in accorcance with Regulatory Position C.2.e of Regulatory. Guide 1.108, Revision 1 August 1977, where the last 100 tests are determined on a per nuclear unit basis. With the exception of the semi-annual fast start, no starting time re-quirements are required to meet the valid test requirements of Regulatory Guide 1.108.

LA SALLE - UNIT 1 3/4 8-7 Amendment No. 23  ! 

          -[ .[~h. .                .                                                      THis p%c        is Effsc: Tap    sy ANODiEE      A M ENDMD/ T REotEsr
                                                                                                                                     ]

2BM TTED oN 3/S/09 3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1 and 3/4.8.2 A.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that suffi:::fent 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 sour. es and distribution systems satisfy the requirements of General Design Criteria 17 of Appendix "A" to 10 CFR 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 accident analyses and are based upon maintaining at least Division I or II of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failura of one of the two onsite A.C. sources. Division III supplies the high pressure core spray (HPCS) system only. . 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 is 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 Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Sup-plies," March 10, 1971, with the exception noted in Appendix B to the FSAR, and Regulatory Guide 1 108, 'Periodi: Testing nf Diesel Generator Units Used as Onsite Electric Power Systems _ at Nuclear Power Plants," Revision 1. August 1977. 5gf ' The diesel generator fast start surveillance requirements, based on a W 9 g4 study, are sufficient to demonstrate the onsite A.C. power system capability to i mitigate the consequences of the design basis event for the plant, i.e., large ( LOC /. coincident with a loss-of-offsite power, while minimizing the mechanical j 

                            \ stress and wear on the diesel engine.                                                       s f
                                      %-Ttnr1Idrve111atice requirements for descnstrating the OPERABILITY of the unit batteries are ir. accordance with the recommendations of Regulatory Guide 1.129, " Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Station and Substations."

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage onfloat charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high ( discharge rates and compares the battery capacity at that time with the rated capacity. La SALLE - UNIT 1 B 3/4 8-1 Amendment No.16

,, .. 9 ,. a y ~ l %l .- Ib > l ~ . 2HSEKI_A

  • All planned diese1' generator starts performed for the purpose of meeting these surveillance requirements may ba preceded by an engine

_- prelube period, as recommended by the manuf at tmi ar. INSERI_D 

                  **. Surveillance testing to verify the diesel generator start (13 second) and load (60'second) times from ambient conditions shall be performed                 i at least once per 184 days. All other engine starts performed for the purpose of meeting these surveillance requirements may be conducted in accordance with warmup and loading procedures,' as recommended by the manufacturer, in order to minimize mechanical stress and wear on the diesel generator. caused by fast starting and

[ loading of the diesel generator. IMSERT_C 

                 *** Transients, cutside of this load band, do not invalidate the surveillance tests.

INSERT _D The diesel generators are equipped with a pre-lubrication system which maintains a continuous flow of oil to the diesel engine moving parts while the engine is shutdown. The purpose of this system is to increase long term diesel generator reliability by reducing the stress and wear caused by frequent dry starting of the diesel generator. The diesel generator pre-lube may be accomplished either-through, normal operation.of the installed pre-lubrication system, or by manual pre-lubrication of the diesel generator in accordance with manufacturers instructions. Performance of a idle start of the diesel generator is not considered to be a means of pre-lubrication. Analysis has shown'that testing, which includes a bemi-annual fast start of the diesel generators, is sufficient to demonstrate the capability of the On-Site A.C. power systems to mitigete the consequences of the design basis event for the plant (i.e., large LOCA coincident with a loss-of-offsite-power). All other engine sta;ts, for the purpose of meeting the diesel generator nurve311ance requirements, may be preceded by a warm-up period of low opeed operation (idle start), and gradual loading procedures, as recommended by the manufacturer, so that the mechanical stress and wear on the diesel generators is minimized. The load band of 2400kw to 2600kw is provided only to avoid routine overloading of the diesel generators. Momentary transients, outside the load band, due to changing bus loads do not invalidate the surveillance tests. 0192T _ _ _ . --_____ --______-_ a

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:

a. Determined. OPERABLE at least once per 7 days by verifying correct breaker alignments and indicated power availability, and
b. Demonstrated OPERABLE at least once per 18 months during shutdown by manually transferring unit power supply from the normal circuit to the alternate circuit.

4.8.1.1.2 Each of the above required diesel generators shall be demonstrated OPERABLE:

a. In accordance with the frequency specified in Table 4.8.1.1.2-1 on a STAGGERED TEST BASIS by:
1. Verifying the fuel level in the day fuel 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 fuel tank.
4. Verifying the diesel starts from ambient conditionWand ac eierates to 900 rpm + 5%, -2% in less than or equal to 13 seconds.* The generator voltage and frequency shall b 4160 1 150 volts and 60 + 3.0, -1.2 Hz withir 13 second
  • fter the start signal.
5. Verifying the diesel generator is synchroni ed, loaded to ;;rcatcr N g g w eh;;. r e- M to 2600 kWiwithin 60 seconds,* and operates with 4' thisloadforatleast6OJminutes.
                                                                                                            ^
6. Verifying the diesel generator is aligned to provide standby power to the associated emergency busses.
7. Verifying the pressure in all diesel generator air start receivers to be greater than or equal to 200 psig.
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 hour by checking for and removing accumulated water from the day fuel tanks.
c. At least once per 92 days and from new fuel oil prior to addition to l

the storage tanks by verifying that a sample obtained in accordance with ASTM-D270-1975 has a water and sediment content of less than or equal to 0.05 volume percent and a kinematic viscosity @ 40 C of greater than or equal to 1.9 but less than or equal to 4.1 when tested in accordance with ASTM'-D975-77, and an impurity level of less than 2 mg of insolubles per 100 mL when tested in accordance with ASTM-D2274-70. n 

                                               ^
                                                                                                      )(

lTusetTA besedieselgeneratorstartsfromambientconditionsshallbe"performedonly] l

1
5FE
8 once per 184 days in these surveillance tests ahd all other engine starts for the purpose of this surveillance testing shall be preceded by an engine i IWWU g l prelube period and/or other warmup procedures recommended by the manufacturer u so that mechanical stress and wear on the diesel enaine is minimized.

LA SALLE - UNIT 2 3/4 8-3 '

ELECTRICA'l POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. At least once per 18 months during shutdown'by:
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 capabilityko reject a load of greater than or equal to 1190 kW for diesel generator 0, greater than or equal to 638 kW for diesel generators IA and 2A, and greater than or equal to 2381 kW for diesel generator 2B while maintaining engine speed less than or equal to 75% of the difference between nominal speed and the overspeed trip setpoint or 15% above nominal, whichever is less.
3. Verifyingthedieselgeneratorcapabilitykorejectaloadof 2600 kW without tripping. The generator voltage shall not exceed 5000 volts during and following the load rejection.
4. Simulating a loss-of-offsite poweMby itself, and:

a) For Divisions 1 and 2 and for Unit 1 Division 2:

1) Verifying deenergization of the emergency busses and load shedding from the emergency busses.
2) Verifying the diesel generator starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 13 seconds, energizes the auto-connected loads and operates for greater than or equal to 5 minutes while its generator is so loaded. After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 1 150 volts and 6011.2 Hz during this test.

b) For Division 3:

1) Verifying deeiergization of the emergency bes.
2) Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads with-in 13 seconds and operates for greater than or equal to 5 minutes while its generator is so loaded. After energization, the steady-state voltage and frequency of the emergency bus shall be maintained at 4160 2 150 volts a N 60 1 1.2 Hz during this test.
5. loss-VerifyingthatonanECCSactuationtestsignal,withougonthe of-offsite power, diesel generators 0, 2A, and 2B start auto-start signal and operate on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 4160 + 416. -150 volts and 60 + 3.0, -1.2 Hz within 13 seconds after the auto-start signal; the steady-state generator voltage and frequency shall be maintained within these limits during this test.

ItJSERT A --* LASALLE - UNIT 2 3/4 8-4 Amendment No. 44

9 ELECTRICALPOWERSYSTEMLS 

              - SURVEILLANCE REQUIREMENTS (Continued)
6. Simulating a loss-of-c,ffsite power in conjunction with an ECCS actuationtest'signaliand:

a) For Divisions 1 and 2:

1) Verifying deenergization of the emergency busses and load shedding from the emergency busses.
2) Verifying the diesel-generator starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 13 seconds, energizes the auto-connected emergency loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency' loads. After energization, the steady state voltage and frequency of the emergency busses shall be maintained at 4160 t 416 volts and 60 1.2 Hz during this test.

b) For Division 3:

1) Verifying deenergization of the emergency bus.
2) Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads within 13 seconds 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 bus shall be maintained at 4160 2 416 volts and 60 1 1.2 Hz during this test.
7. Verifying that all diesel generator 0, 2A, and 28 automatic trips except the following are automatically bypassed on an ECCS actuation signal:

a) For Divisions 1 and 2 - engine overspeed, generator differential current, and emergency manual stop. b) For Division 3 - engine overspeed, generator differential or overcurrent, and emergency manual stop.

6. Verifying the diesel generator operatesN for at least 24 hours.

During the first 2 hours of this test, the diesel generator shall be loaded to greater than or equal to 2860 kW and during the remaining 22 hours of this test, the diesel generator shall l be loaded to 2600 kW. The generator voltage and frequency shall l' be 4160 + 420, -150 volts and 60 + 3.0, -1.2 Hz within 13 seconds after the start signal; the steady-state generator voltage and , frequency shall be maintained within these limits during this I

test. Within 5 minutes after completing this 24 hour test, perform Surveillance Requirement 4.8.1.1.2.d.4.a).2) and b).2). 4 INSERr4 g LA SALLE - UNIT 2 3/4 8-5 1

i 

 >z a

ELECTRICAL POWER SYSTEMS SL*RVEILLANCE REQUIREMENTS (Continued)

9. Verifying.that the auto-connected loads to each diesel generator do not exceed the 2000-hour rating of.2860 kW. *
10. Verifyingthedieselgenerator'scapabilit/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 diesel generator 0, 2A, and 2B operatingiin a test mode and connected to its bus:

a) For Divisions 1 and 2, that a simulated ECCS actuation signal overrides the test mode by returning the diesel generator to standby operation. b) For Division 3, that a simulated trip of the diesel generator overcurrent relay trips the SAT feed breaker to bus 243 and that the diesel generator continues to supply normal bus loads.

12. Verifying that the automatic load sequence timer is OPE,RABLE with the interval between each load block within i 10% of its design interval for diesel generators 0 and 2A.
13. Verifying that the following diesel generator lockout features prevent diesel generator operation only when required:

a) Generator underfrequency. b) Low lube oil pressure. - c) High jacket cooling temperature. d) Generator reverse power. 

                              ,              e)    Generator overcurrent._

f) Generator loss of field. l g) Engine cranking lockout. Y 

              % hf Surveillance Requirements 4.8.1.1.2.d.4.a)2) and/or b)2) are not satisfactorily completed, it is not necessary to repeat the preceding 24 hour test. Instead, the diesel generator may be operated at 2600 kW for 1 hour or until operating temperature has stabilized.

LSERT A -r LA SALLE - UNIT 2 3/4 8-6

M IS PAGE IS effec.TED DY 

    '              '                                                       ANOTH E R    AME NDM ENT EEQMEST SMBM)TTED od         kib[64-ELECTRICAL POWER SYSTEMS
             - -- SURVEILLANCE REQUIREMENTS (Continued)

E

e. At least once per 10 years or after any modifications whhh could affect diesel generator interdepen nce by starting dieseG, gener-ators 0, 2A, and 2B simultaneous 1 during shutdown, and serifying that all three diesel generators accelerate to 900 rpm + h, -2% in less than or equal to 13 seconds.
f. At least once per 10 years by:
1. Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypochlorite or equivalent solution, and
2. Performing a pressure test of those portions of the diesel fuel oil system designed to Section III, subsection NO, of the ASME Code in accordance with ASME Code Section 11, Article IWD-5000.

4.8.1.1.3 Reports - All diesel generator failures, valid or non-valid, shall be reported to the Commission pursuant to Specification 6.6.C within 30 days. 

                     " ports 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 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. h5GRT' A N TABLE 4.8.1.1.2-1 DIESEL GENERATOR TEST SCHEDULE Nm pac,E Number of Failures in Last 100 Valid Tests

  • Test Frecuency
                                  <1                                    At least once per 31 days                    ,

2 At least once per 14 days 3 At least once per 7 days i l >4 At least once per 3 days i

  • Criteria for determining number of failures and number of valid tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.108, Revision 1, August 1977, where the last 100 tests are determined on a per nuclear unit basis. With the  !

exception of the semiannual fast start, no starting time require- l ments are required to meet the valid test requirements of  ! Regulatory Guide 1.108. LA SALLE - UNIT 2 3/4 8-7 Amendment No.Il

n , TWIS pGE is FS-FECTED BV 

                                ~

At40THER AMENpMENT REQ (4 EST 3/4.8 ELECTRICAL POWER SYSTEMS StGM LT'T E P 09 3/lb / 89 BASES 3/4.8.1 and 3/4.8.2 A.C. SOURCES and DNSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.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 consis-tent with the initia? condition assumptions of the accident analyses and are based upon maintain $.g at least Division I or II of the onsite A.C. and 0.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss-of-offsite power and single failure of one of the two onsite A.C. sources. Division III supplies the high pressure core spray (HPCS) system only. The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensur6s that (1) the facility can be maintained in the shutdown or refueling condition for extended time periods and (2) sufficient instrumentation and control capability is 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 Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power i Supplies," March 10, 1971, with the exception noted in Appendix B to the FSAR, and Regulatory Guide 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977. Mg The diesel generator fast start surveillance requirements, based on a PRA study, are sufficient to demonstrate the onsite A.C. power system capability to P Lt mitigate the consequences of the design basis event for the plant, i.e., large j LOCA coincident with a loss of-offsite power, while minimizing the mechanical ( stress and wear nn the diesel engine. / f T The surveillance requirements for demonstrating the OPERABILITY of the unit batteries are in accordance with the recommendations of Regulatory Guide 1.129, " Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Ststion and Substations." Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage onfloat charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity. 

 >         LA SALLE - UNIT 2                       B 3/4 6-1

                             .        .                                 11!HERT_A All planned diesel generator starts performed for the purpose of meeting these surveillance requirements may be preceded by an engine L                                           prelube period, as recommended by the manufacturer.

INSERT B 

                                        ** Surveillance testing to verify the diesel generater start (13 second) and load (60 second) times from ambient conditions shall be performed at least once per 184 days.      All other engine starts performed for the purpose of meeting these surveillance requirements may be conducted in accordance with warmup and loading procedures, as recommended by the manufacturer, in order to minimize mechanical stress and wear on the diesel generator caused by fast starting and i                                           loading of the diesel generator.

INSERI_C 

                                     *** Transients, outside of this load band, do not invalidate the surveillance tests.

IESERI_D The diesel generators are equipped w3th a pre-lubrication system which maintains a continuous flow of oil to the diesel engine moving parts while the engine is shutdown. The purpose of this system is to increase long term diesel generator reliability by reducing the stress and wear caused by freguent dry starting of the diesel generator. The diesel generator pre-lube may be accomplished either through, normal operation of the installed pre-lubrication system, or by manual pre-lubrication of the diesel generator in accordance with manufacturers instructions. Performance of a idle start of the diesel generator is not considered to be a means of pre-lubrication. Analysis has shown that testing, which includes a semi-annual fast start of the diesel generators, is sufficient to demonstrate the capability of the On-Site A.C. power systems to mitigate the consequences of the design basis  ! event for the plant (i.e., large LOCA coincident with a loss-of-offsite-power). All other engine starts, for the purpose of meeting the diesel generator surveillance requirements, may be preceded by a warm-up period of low speed j operation (idle start), and gradual loading procedures, as recommended by the ) manufacturer, so that the mechanical stress and wear on the diesel generators is minimized. The load band of 2400kw to 2600kw is provided only to avoid routine overloading of the diesel generators. Momentary transients, outside the load band, due to changing bus loads do not invalidate the surveillance  ! tests. ) l l 1 0192T 

 *s : ... ,
            -91                                                                ,

ATIACIMElfLC SIGNIFICANT llAZARDS CON _ SIDERATION Commonwealth Edison has evaluated the proposed Technical Specification Amendment bnd determined that it does not represent a significant hazards consideration. Based on the criteria for defining a significant hazards-consideration established in 10 CFR 50.92, operation of LaSalle County Station Units 1 and '2 in accordance with the proposed amendment wJ.lLng.t: _

1) Involve a significant increase in the probability or consequences of an accident previously evaluated because:

This proposed amendment is an administrative change intended to clarify the requirements for fast start and loading of the diesel generators. This proposal does not change the intent of the technical specifications,. as defined in the bases and in LaSalle SSER 7 (NUREG-0519), page 16-1.

2) Create the possibility of a new or different kind of accident from an accident previously evaluated because:

This proposed-amendment does not involve any changes to the facility or to the operation of the facility as described in UFSAR, therefore, it will not create the possibility of a new or different kind accident.

3) Involve a significant reduction in the margin of safety because:

This snendment provides a clarification of the current regui.ations . for fast start and loading of the diesel generators. Diesel generator reliability is enhanced by ensuring that the diesel generators are. i properlys pre-lubricated prior to starting, and warmed prior to loading. 

                                                                                                                                                                                                                          ]

A load range has been added to help ensure that the diesel generators are not routinely overloaded during normal operation. Therefore, these changes do not involve a significant reduction in the margin of safety. Guidance has been provided in 51 FR 7744 (Reference (a)), for the application of standards of license change requests for determination of the existence of significe.nt hazards considerations. This document provides m amples of amendments which are and are not likely considered to involve significant hazards considerations. This proposed smendment most closely resembles examples e(i) of those examples deemed not likely to involve a  ; significant hazards consideration. It is purely an administrative change meant to clarify the requirements. 1 i 1 i

4 This proposed amendment does pn involve a significant relaxation of the criteria use to establish safety limits, a significant relaxation of the bases for the limiting safety system settings or a significant relaxation of the bases for the limiting conditions. Therefore, based on the guidance provided in the Federal Register and the criteria established in 10 CFR 50.92(e), the proposed changes does not constitute a significant hazards consideration. 0192T

j -. ' . , 4 0 l.. 1 I ATIACIMl2iLD l NUREG-0519 SUPPLEMENT NO. 7 SAFETY EVALUATION REPORT RELATED TO OPERATION OF l LASALLE COUNTY STATION UNITS 1 AND 2 PAGES 16-1 AND 16-2 l i 0191T:7 I i I l 1 _ _ _ _ . _ . . - i

3 (% w' 16 TECHNICAL SPECIFICATIONS By letter dated December 9,.1983, CECO proposed revisions to the Lt.Salle Unit 1 The technical specification and the proposed Unit 2 Technical Specifications. changes involve redtetion in the number of required fast cold start survetilance All surveillance testing not required to be per-testing -of diesel ger.erators. formed at a fast cold start will be preceded by an engine prelube period and/or We other warmup procedures recommended by the diesel generator manufacturer. find the proposed technical specification changes to be acceptable based on the following justification. The NRC staff has for sometime had under review and assessment the m diesel generator testing. The present method of testing does not take into consideration those manufacturer recommended preparatory actions such is pre-g 00 lubrication and all moving parts and warmup procedures which are necessary to The existing stand-reduce engine wear, extend life and improve availability. ard technical specifiestions require cold fast starts for surveillance testing which in many engine designs and operating practices subject the diesel engine Nuclear industry related groups such to undue wear and stress on engine parts. as Institute of Nuclear Power Operations and American Nuclear Insurer have expressed concern based on operating experience that cold f ast start testing if proper pro-results in incremental degradation of diesel engines and that, cedures covering warmup prelubrication, loading / unloading etc. were taken, an While the require-improvement in reliability and availability would be gained. ments for cold f ast starts is based on the emergency diesel generator's functional requirements in response to a loss-of-coolant accident coincident with a loss of offsite power, preliminary analysis indicates that two f ast starts per year is a sufficient number to assure the required diesel generator reliability under design basis conditions. Thus, it is the NRC staff's technical judgement that an overall improvement in diesel engine reliability and availability can be gained by performing diesel generator starts for surveillance testing using 

  .yf3 engine prelube and other manufacturer recommended procedures to reduce engin stress and wear.
             "amma 1_                 _

16-1

l kg)TheNRCstaff,therefore,concludesthatCECobegiventheopportunitytoinsti-l tute technical specifications changes for LaSalle Units 1 and 2 surveillance testing which permit diesel engine prelube and other manufacturer recommended procedures. The Technical Specifications will retain the demonstration of fast start testing on an increment of every 184 days. This is consistent with the-proposed NRC staff resolution of the fast cold start issue. The number and i l period of surveillance tests specified in the Standard Technical Specifications remain unchanged. Though very unlikely, should final resolution of this issue result in changes to this position with respect to required diesel generator surveillance tasting, we will so inform CECO. This action is being taken on a plant specific interim basis, pending final approval of Generic Issue B-56, dealing with surveillance testing of diesel generators. It is also the NRC staff's conclusion that the health and safety of the public will be improved by these improved testing methods and, therefore, are acceptable. Q s..s e p:% 

       \;/

La Salle SSER 7 16-2 _ _ _ _ _ _ _ - - _ _ - - _ - - _ i}}

Retrieved from "https://kanterella.com/w/index.php?title=ML20246B132&oldid=3212961"